Extra-large area concrete floor structure shrinkage control construction technology

The invention relates to an extra-large area concrete floor structure shrinkage control construction technology which effectively controls the extra-large area concrete cracks. When the shrinkage control construction technology is applied, control is mainly performed in the aspects of design and construction technology and comprises design control, material control, construction control and on-site monitoring control. According to the extra-large area concrete floor structure shrinkage control construction technology, the integrality of the floor structure can be effectively ensured, the concrete floor structure durability is improved, construction is reasonably organized, the construction period can be greatly shortened compared with standard arrangement post-cast strip scheme, and the giant economic benefits are brought to engineering projects, particularly industrial projects.

Construction method for quality control of fabricated concrete member

The invention provides a construction method for quality control of a fabricated concrete member, and relates to the technical field of fabricated buildings. The construction method for the quality control of the fabricated concrete member comprises the following steps: 1, construction; 1, preparing a mold; 2, preparing an embedded part; 3, preparing reinforcing steel bars; 4, concrete manufacturing; 5, steel bars and embedded parts are put into the mold; and sixthly, concrete pouring, curing and on-site installation are conducted, control over the quality of the fabricated concrete building is achieved, secondary quality defects such as honeycombs, pitted surfaces, bubbles and missing edges and corners and main treatment defects such as cracks, insufficient strength and steel bar protection layer problems are avoided, and the requirements of people for the building can be met.

Debonding detection method of concrete filled steel tube

The invention discloses a debonding detection method of a concrete filled steel tube. The method includes: an S1 step of disposing a plurality of detection points along the axial direction on the outer wall of the concrete filled steel tube to be detected, and putting an acceleration sensor on each of the detection positions; an S2 step of knocking the steel tube, with a rubber hammer, among the sensors or at the opposite surfaces of the positions where the sensors are installed, measuring acceleration response signals of the detection points through the acceleration sensors, and inputting the acceleration response signals into an analyzing and processing module; and an S3 step of analyzing by the analyzing and processing module to obtain a nonlinear vibration level of each detection point and preforming debonding identification according to the nonlinear vibration level of each detection point. The method is based on the nonlinear vibration theory, the acceleration signals of a free vibration ...

Method for controlling nitrogen content in process of producing aluminium deoxidation high-carbon steel

The invention relates to a method for controlling the nitrogen content in the process of producing aluminium deoxidation high-carbon steel. The outlet steel temperature and the end point carbon content are controlled in the steel outlet process of an electric converter, deoxidizing agents are added in a step-by-step measurement mode in the steel outlet process, the slugging effect is improved, the outlet steel argon blowing pressure is controlled, foaming slag is manufactured in the refining process, the refining electricity conduction time, the outlet sulfur content and the aluminum content are controlled strictly, the vacuum nitrogen removal efficiency is improved, continuous casting protective casting is reinforced, and molten steel is prevented from absorbing massive nitrogen. The method effectively and quantitatively uses the double functions of nitrogen absorption and denitrification of surface-active elements in the molten steel, lays emphasis on nitrogen control in the key links ...

Measurement device for inside hygrometry of concrete and temperature

The utility model provides a measurement device for inside hygrometry of concrete and temperature, including hollow columniform section of thick bamboo body, temperature humidity sensor, terminal equipment, wherein the temperature humidity sensor set up a section of thick bamboo is originally just internal temperature humidity sensor's one end certainly the one end of section of thick bamboo body is outstanding, temperature humidity sensor's the other end passes through the electric wire and is connected with terminal equipment, be stained with the mackintosh on the other end of section of thick bamboo body, the electric wire with the cover is equipped with the PVC pipe around the temperature humidity sensor hookup location, PVC pipe with it has sealed glue to fill between the electric wire. The utility model has the advantages of can accurate detect out and mix inside hygrometry in territory and temperature.

Microwave multiparameter measuring device, and detecting method

Debonding detection system of concrete filled steel tubes

The invention discloses a debonding detection system ofconcrete filled steel tubes. The system comprises acceleration sensors, a signal collecting device and an analysis processing module, wherein the acceleration sensors are arranged on the outer wall of a concrete filled steel tube to be detected, and when using a force hammer to knock the concrete filled steel tube between the acceleration sensors or in the position opposite to that where the acceleration sensors are arranged, acceleration response signals are detected by the acceleration sensors, and are input into the analysis processing module by the signal collecting device; the analysis processing module is used for analyzing the acceleration response signals, inspecting the nonlinear vibration degree of the concrete filled steel tube, and performing debonding recognition according to the nonlinear vibration degree of the concrete filled steel tube. The system adopted by the invention is based on the nonlinear vibration theory, ...

Three-crankcase steel connecting bridge and manufacturing method thereof

The invention discloses a three-crankcase steel connecting bridge. The bridge consists of a top plate, a bottom plate, longitudinal web plates, a longitudinal stiffening plate, a transverse partition plate, an end cladding plate and bridge pier supports; the longitudinal web plates are fixed on the bottom plate, and the longitudinal stiffening plate is parallel to the longitudinal web plates and arranged between the longitudinal web plates; the transverse partition plate is arranged between the longitudinal web plates; the bridge pier supports are arranged at two ends of the bottom plate; and the top plate is covered on the longitudinal web plates and the longitudinal stiffening plate. The invention also discloses a manufacturing method of the three-crankcase steel connecting bridge. The three-crankcase steel connecting bridge has skilful structural design, unique shape, novel structure and smooth line type, and is light and attractive. According to the manufacturing method, a zone integrated ...

Water permeability measuring device of concrete permeates water

The utility model provides a water permeability measuring device of concrete permeates water, its includes a first measurement body, is wherein first measurement body has a first chamber that holds, and the surface of first measurement body is equipped with a scale, the body is measured to a second, wherein second measurement body has a second and holds the chamber, first measurement body extend integratively in the upper portion of body is measured to the second, and an inoxidizing coating, wherein the inoxidizing coating is located the second hold the chamber and attached in the inner wall of body is measured to the second, with form a test cavity between the inoxidizing coating, first hold the chamber communicate in the test cavity, and the first size of holding the chamber is less than or equals the size of test cavity.

Damage detection system for semirigid connections of structure members

The invention discloses a damage detection system for semirigid connections of structure members. Free-vibration signals of the members are acquired by sensors distributed near the semirigid connections of the end parts of the detected members, and after the signals are analyzed and processed by certain analysis and processing modules, an amplitude-time curve and a frequency-time curve of the end parts of the members are obtained, and further a frequency-amplitude curve of the end parts of the members is obtained; frequency change values in same amplitude intervals in the curves are compared to judge the damages of the semirigid connections, and the larger the frequency value change is, the more serious the damage is. In actual detection, multiple members with same installation state can be detected, then the frequency-amplitude curve of each end of all the members is obtained, and damage of the semirigid connections and the damage degree can be judged by comparing the frequency change ...

Pouring device and method for pouring high-similarity concrete

The invention discloses a pouring device for pouring high-similarity concrete. The pouring device comprises mounting frames, a plurality of bearing molds are mounted between the two mounting frames, reciprocating lead screws are rotationally connected to the mounting frames, a plurality of funnels which are connected into a whole are in threaded connection to the reciprocating lead screws, and one end of each reciprocating lead screw is connected with a driving motor; a plurality of strip-shaped teeth are installed between the two installation frames side by side, a gear ring meshed with the strip-shaped teeth is rotationally connected into the funnel, the gear ring is connected with a connecting frame, and a plurality of stirring rods are installed on the connecting frame. The pouring method for pouring the high-similarity concrete comprises the steps that the concrete is poured into the funnel; the driving device is started to enable the concrete in the funnel to be poured into the receiving ...

Square connection gridding single-layer arch-shaped net shell roof structure and manufacturing method thereof

The invention discloses a square connection gridding single-layer arch-shaped net shell roof structure. A plurality of groups of box-shaped double curved arches in two different directions are connected crossly so as to form a net shape. The square connection gridding single-layer arch-shaped net shell roof structure is characterized by being formed by assembling an X-shaped joint (1), a Y-shaped joint (2) and a box-shaped inclined rod (3). The invention also discloses a manufacturing method for the square connection gridding single-layer arch-shaped net shell roof structure. The square connecting gridding single-layer arch-shaped net shell is convenient to process under the premise of guaranteeing the structure requirement.

Method for comprehensively preventing and treating indirect cracks in premixed concrete construction periods

The invention discloses a method for comprehensively preventing and treating indirect cracks in premixed concrete construction periods. The method includes steps of firstly, optimizing structures; secondly, optimally selecting raw materials; thirdly, selecting anti-crack construction mix proportions; fourthly, controlling and monitoring construction procedures; fifthly, finding out the cracks, investigating conditions, finding out reasons, and analyzing and judging the reasons; sixthly, determining remedial measures, and repairing, strengthening and reinforcing surfaces. The method for comprehensively preventing and treating the indirect cracks in the premixed concrete construction periods has the advantages that early-age shrinkage parameters and the like of premixed concrete walls can be scientifically tested by the aid of the steps for analyzing and judging the reasons and repairing or strengthening and reinforcing the surfaces, so that the problem of indirect cracks in premixed concrete ...

Multi-frame circulating rolling display device

The invention provides a device prestoring multiple frames for circulating rolling display. In the device, a group of magnet wheels (discs) are arranged on the upper part in a window frame type deviceThe invention provides a device prestoring multiple frames for circulating rolling display. In the device, a group of magnet wheels (discs) are arranged on the upper part in a window frame type device, and are fixed on at two ends of a transverse shaft a through the circle center; an iron transverse rod is bonded on the tail end of a frame to densely suspend the frame on the rod; a picture can be, and are fixed on at two ends of a transverse shaft a through the circle center; an iron transverse rod is bonded on the tail end of a frame to densely suspend the frame on the rod; a picture can bechanged according to the content at any time, and the frame is made of a flexible terylene film; the picture can be changed through overlapped adhesion, two longitudinal edges of the device machine archanged ...

Actual load measuring method of ultra-high-rise steel and concrete combination structure

The invention discloses an actual load measuring method of the ultra-high-rise steel and concrete combination structure. The actual load measuring method includes the following steps that a reasonable measurement manner is adopted for carrying out load bearing entity measurement on the full process of concrete frame core cylinder structure construction; by combining with an actual measurement result, a finite element analysis SAP 2000 is used for setting up a reasonable concrete frame core cylinder structure construction stage vertically stressed and deformation analysis model which is used for numerical analysis and calculation; entity measurement and analog computation are analyzed. According to the actual load measuring method of the ultra-high-rise steel and concrete combination structure, the method combining on-spot entity measurement and numerical analysis computing is adopted, the reasonable measurement manner is used for carrying out load bearing entity measurement on the full ...

Building energy consumption predicting and analyzing system based on cloud computing

The invention discloses a building energy consumption predicting and analyzing system based on cloud computing. The building energy consumption predicting and analyzing system comprises a material obtaining module used for obtaining various design drawings and corresponding design parameters of a building, a building model generating module which is connected with the material obtaining module and used for producing a model of the corresponding material building, a building energy consumption model generating module which is connected with the building model generating module and used for generating a building energy consumption model, a judging and evaluating module which is connected with the building energy consumption model generating module and used for computing and comparing energy consumption of the building, and a summarization storage module which is connected with the judging and evaluating module and used for further organization and storage of the judging and evaluating module ...

Assembled steel structure of external wall

The utility model discloses an assembled steel structure of external wall, include: an assembled steel structure of external wall, includes: be located outdoor ALC wallboard, the ALC wallboard meets the position and is equipped with the layer board, and the top that lies in the 2nd ALC board of bottom and the lower part of a ALC board on upper portion in the two ALC wallboards that meet lies in indoor one side and all be equipped with the ALC externally -hanging wallboard node, just is equipped with the structure roof beam between the two ALC externally -hanging wallboard nodes, be equipped with lining wall on the structure roof beam, lining wall and ALC wallboard fixed connection. The utility model discloses in an assembled steel structure of external wall, it adopts narrower structure roof beam, its thickness of attenuate is, increases its height, guarantee its with the constructional column welding after have sufficient anti lateral stabilty, the rethread sets up lining wall above that ...

Movable jig frame for mounting roof truss

The invention discloses a movable jig frame for roof truss installation, and belongs to the technical field of truss installation auxiliary frame structures. When a telescopic rod is shortened, an included angle between a supporting rod and a vertical frame is reduced, a vertical seat gradually descends and abuts against the ground on the side face of a temporary rail, and supporting threaded columns on the two sides of the vertical frame can be adjusted respectively; according to the movable jig frame, the vertical seats on the two sides are supported on the bottom face, through supporting of the vertical seats, the vertical seats are in surface contact with the ground, the contact face of the whole movable jig frame and the ground is increased, and it is guaranteed that the movable jig frame cannot deviate on a temporary rail when the movable jig frame is located at the fixed position by means of friction stress between the ground and the vertical seats; according to the structure, the ...

Fabricated building structure thermal insulation wallboard capable of being rapidly built

The invention discloses an assembly type building structure heat preservation wallboard for rapid construction, and belongs to the technical field of assembly type buildings, the assembly type building structure heat preservation wallboard comprises a wallboard body, a heat preservation layer is arranged in the wallboard body close to the inner side of the wallboard body, a plurality of column grooves are distributed in the outer side surface of the wallboard body, and the axes of the column grooves are perpendicular to the heat preservation wallboard; heat conduction assemblies are arranged in the column grooves in a one-to-one correspondence manner; the heat conduction pipe is coaxially arranged in the column groove, one end of the heat conduction pipe extends out of an opening of the column groove, the other end of the heat conduction pipe is connected to the heat preservation layer, the outer end of the heat conduction pipe is rotationally matched with an induction assembly, the outer ...

Cracking prediction method based on elasticity modulus of concrete under action of capillary pore stress

The invention provides a concrete elastic modulus cracking prediction method based on the action of capillary pore stress, and the method comprises the steps: obtaining the first capillary pore stress of concrete at a first moment and the second capillary pore stress of the concrete at a second moment according to an established concrete shrinkage model, and calculating the cracking of the concrete according to the first capillary pore stress; acquiring a first shrinkage strain of the concrete at the first moment according to the first capillary pore stress, acquiring a second shrinkage strain of the concrete at the second moment according to the second capillary pore stress, and acquiring an average elastic modulus of the concrete from the first moment to the second moment according to the first shrinkage strain and the second shrinkage strain, the average elastic modulus is obtained by adopting the following formulas: Et (delta t) = (sigmac (t2)-sigmac (t1))/(epsilonf (t2)-epsilonf (t1 ...

Complex annular shed bending and twisting component and manufacturing method thereof

The invention discloses a complex annular shed bending and twisting component. The complex annular shed bending and twisting component comprises shed bending and twisting members and secondary rib rod pieces, wherein each shed bending and twisting member comprises a main rib body, secondary rib corbel connecting pieces, curtain wall rod piece connecting pieces, curtain wall rod pieces, secondary rib corbels, a box-shaped corbel and the like; the curtain wall rod piece connecting pieces, the secondary rib corbel connecting pieces, the secondary rib corbels, the curtain wall rod pieces and the box-shaped corbel are welded on the body side of the main rib body; the curtain wall rod pieces are welded on the curtain wall rod piece connecting pieces; the secondary rib corbels are welded on the secondary rib corbel connecting pieces; and the secondary rib rod pieces are connected with the secondary rib corbels to connect the two groups of shed bending and twisting members together. The invention ...

Method for detecting damage to semi-rigid connection of structural member

The invention discloses a method for detecting damage to semi-rigid connection of a structural member, wherein a sensor arranged near to the semi-rigid connection of the end part of the member acquires a free vibration signal of the member, the signal is analyzed and processed to finally obtain a amplitude-time cure and a frequency-time curve for the end part of the member, then a frequency-amplitude curve for the end part of the member is further obtained, the change values of the frequency within the same amplitude interval in the curve are compared to judge the damage of the semi-rigid connection, the high the change value of the frequency is, then the more serious the damage is, a plurality of members in the same installation state are detected in the practical detection, then the frequency-amplitude curve for each end of each member is obtained, and the change values of the frequency within the same amplitude interval in the curve are compared to judge the damage and the damage degree ...

Smelting process of high-carbon bearing steel

The invention discloses a smelting process of high-carbon bearing steel. High-alkalinity refining slag with the alkalinity value of 6-9 is obtained through adding conditioned slag and a deoxidizing agent, so that relatively good desulfuration and deoxidization effects are achieved, the content of S can be reduced to about 0.002%, and the content of O can be reduced to be less than 7ppm. Meanwhile, in order to avoid brittle impurity generation caused by overhigh alkalinity of refining slag, the content Al of the molten steel is strictly controlled in a smelting process, enough aluminum blocks for deoxidizing are added at one step in a tapping process, and no aluminum is replenished in the subsequent process, so that a deoxidized product is prevented from being floated; the content of Al in the refining slag is controlled at about 0.010%, so that secondary oxidation caused in a pouring process is reduced. On the other hand, the value of CaO/Al2O3 in the refining slag is controlled at about ...

Simulation method for full steel structure lifting process based on 3D (third-dimensional) visualization technology

The invention discloses a simulation method for a full steel structure lifting process based on a 3D (third-dimensional) visualization technology. The simulation method comprises the following steps of selecting visualization software; manufacturing a steel structure through 3DMax, and modeling a construction scheme; mounting the steel structure; mounting a skylight-steel structure. The visualization technology of the simulation method is applied to construction of building engineering; each step and each detail in an engineering construction process can be subjected to analog calculation in advance; data are dynamically and three-dimensionally displayed on a screen by an advanced rendering technology, and process information is intuitively and vividly supplied, so that a construction organization designer can be helped to select the construction scheme and preferably select construction parameters. Due to the visualization technology, each step in the construction process can be tracked ...

Complex annular shed bending and twisting component and manufacturing method thereof

The invention discloses a complex annular shed bending and twisting component. The complex annular shed bending and twisting component comprises shed bending and twisting members and secondary rib rod pieces, wherein each shed bending and twisting member comprises a main rib body, secondary rib corbel connecting pieces, curtain wall rod piece connecting pieces, curtain wall rod pieces, secondary rib corbels, a box-shaped corbel and the like; the curtain wall rod piece connecting pieces, the secondary rib corbel connecting pieces, the secondary rib corbels, the curtain wall rod pieces and the box-shaped corbel are welded on the body side of the main rib body; the curtain wall rod pieces are welded on the curtain wall rod piece connecting pieces; the secondary rib corbels are welded on the secondary rib corbel connecting pieces; and the secondary rib rod pieces are connected with the secondary rib corbels to connect the two groups of shed bending and twisting members together. The invention ...

Quickly-built assembly type foundation for earthquake relief work

The invention discloses a quickly-built fabricated foundation for earthquake relief work, and belongs to the technical field of building construction, the quickly-built fabricated foundation comprises a plurality of foundation beams, connecting foundations are arranged at connecting points of adjacent foundation beams, cavities are formed in the connecting foundations, and a plurality of ports are formed in the side walls of the cavities; a coaxial first annular groove is formed in the side wall of the middle of the port, a connecting sleeve is arranged at the port, a coaxial annular plate is fixed to the peripheral side of the connecting sleeve, the annular plate extends into the first annular groove and is in sliding connection with the first annular groove, and a driving structure used for driving the annular plate to move in any longitudinal direction is arranged in the annular groove; movable columns are slidably connected into the connecting sleeves, fixed sleeves are detachably connected ...

Multi-frame circulating rolling display device

The invention provides a device prestoring multiple frames for circulating rolling display. In the device, a group of magnet wheels (discs) are arranged on the upper part in a window frame type device, and are fixed on at two ends of a transverse shaft a through the circle center; an iron transverse rod is bonded on the tail end of a frame to densely suspend the frame on the rod; a picture can be changed according to the content at any time, and the frame is made of a flexible terylene film; the picture can be changed through overlapped adhesion, two longitudinal edges of the device machine are respectively provided with a transmission chain belt respectively, and a 90-degree rotatable metal hook is fixed on the synchronous position of each transmission chain belt; after the device is started, through A point, a non-magnetic transverse rod on the head end of the frame is hooked, does not attract a magnetic transverse rod, and smoothly runs to a visible window (0) to form rolling visual ...

Method for monitoring construction engineering foundation pit

The invention discloses a method for monitoring a construction engineering foundation pit. The method for monitoring the construction engineering foundation pit comprises the following steps of selecting displacement values of five monitoring points; using data of the monitoring points as input vectors of samples, and using rock-soil body parameters corresponding to the samples as output vectors; performing non-linear mopping on prototype samples to produce actual training samples; often drawing the monitored data to form a curve changing with time. Based on deformation dynamic prediction and safety control in the soil and rock combined foundation pit construction process and by combining a BP neural network and a sharp point mutation theory, safety evaluation and dynamic control are implemented on the working condition of a deep foundation pit project, actual load, deformation and an internal force value borne by a surrounding soil layer and a supporting structure are monitored at any ...

Control method for cracks generated during construction period of basement baseboard

The invention discloses a control method for cracks generated during the construction period of a basement baseboard. The control method comprises the following steps: step 1, dividing a construction segment and determining the pouring sequence; step 2, carrying out the anti-crack design on the mix proportion of concrete; step 3, monitoring temperature, insulating, storing heat and maintaining; step 4, performing effective control and effect detection on the construction process. Through the reasonable arrangement of reinforcements, the reasonable reserving of expansion joints and the selection method of sand, after test and engineering practice, the control over mass concrete cracks on the baseboard is effective, and the problem that during the construction process, the cracks are generated in the structure can be solved. The control method makes the best of the advantages of crack control to change the condition that in past, the crack control is not ideal. In addition, the control method ...