Ultra-large type geotechnical engineering three-dimensional model test system

The invention relates to an ultra-large type geotechnical engineering three-dimensional model test system, which comprises an ultra-large type model test device, a hydraulic loading system and a stress displacement test system, wherein the hydraulic loading system and the stress displacement test system are connected with the ultra-large type model test device respectively; the ultra-large type model test device comprises a door-type frame; the lower end of the door-type frame is arranged on a bottom plate device; and a model reverse wall positioned on the lower part of the door-type frame is arranged on the bottom plate device. The ultra-large type geotechnical engineering three-dimensional model test system has the advantages that: 1) the ultra-large type geotechnical engineering three-dimensional model test system has compact integrated structure, high strength and large rigidity and can bear kiloton reverse force; 2) the ultra-large type geotechnical engineering three-dimensional model ...

Large-sized combined dynamic and static multifunctional geotechnical engineering simulation testing device

The invention relates to a large-sized combined dynamic and static multifunctional geotechnical engineering simulation testing device which comprises a plurality of counterforce stand devices, a front visible counterforce beam, a rear loading counterforce beam, an arch-shaped dynamic counterforce frame, a hydraulic loading system, a servo dynamic loading system, a model elevating translational trolley system and the like, wherein each counterforce stand device is formed by connecting a top beam, a side beam and a bottom beam through flanges and high-intensity bolts and can be combined freely according to a testing model; the left and the right parts of the front and the rear counterforce beams are connected with the side beam; the upper and the lower parts of the front and the rear counterforce beams are connected with the model elevating translational trolley system through pull rods; the hydraulic loading system is arranged in a steel grid formed by the top beam, the side beam and the ...

Grouting reinforcement grout diffusion regulation method

The invention discloses a grouting reinforcement grout diffusion regulation method. The method comprises the steps that firstly, the grouting reinforcement action of the first stage is finished through a basic grouting reinforcement unit, and the purpose of grouting reinforcement of a surrounding rock is achieved; secondly, the full grouting process is monitored and judged through a grout piercing type diffusion judgment unit, and if the reinforcement grout piercing type diffusion situation is found, a response instruction is transmitted to a grout column spherical face diffusion regulation unit; thirdly, after the grout column spherical face diffusion regulation unit receives a grout piercing diffusion judgment conclusion and an action instruction, the grout diffusion mode is adjusted into the column spherical diffusion mode, and grouting continues to be carried out; fourthly, after the grouting of the first stage is finished, a grouting reinforcement effect evaluation unit is used for ...

Prestressed expanded pipe supporting structure for rock-soil body and construction process

The invention discloses a prestressed expanded body pipe supporting structure for rock-soil bodies and a construction process, and belongs to the technical field of geotechnical engineering supporting, the prestressed expanded body pipe supporting structure comprises an expanded body pipe, a hollow conical expanded body is arranged at the bottom of the expanded body pipe, and a reverse pressure cover plate is arranged at the top of the expanded body pipe; a hollow anchor cable body is arranged in the middle of the expansion body pipe in the axial direction in a full-length mode, and the hollow anchor cable body penetrates through the reverse pressure cover plate and the hollow conical expansion body. The side portion, close to the hollow conical expansion body, of the expansion body pipe is provided with an open seam, and the open seam is arranged in the axial direction of the expansion body pipe. By means of the expansion body pipe, the hollow conical expansion body, the hollow anchor ...

Yielding type special-shaped beam anchor rope truss roadway support system

The invention relates to a yielding type special-shaped beam anchor rope truss roadway support system. A metal net is laid on the surface of the roadway. A yielding type special-shaped beam anchor rope truss is arranged on the coal rock roof or roadside. The yielding type special-shaped beam anchor rope truss comprises special-shaped beams, a yielding device and anchor ropes or anchor rods, wherein each special-shaped beam is provided with a plurality of anchor ropes or anchor rods; the anchor ropes or anchor rods penetrate through the special-shaped beams and the metal net and are anchored into rock layers; and outer anchoring ends of the anchor ropes and anchor rods are provided with the yielding device and a tray for letting the end tips of the anchor ropes and anchor rods to be in contact with the special-shaped beams and exerting yielding action. The yielding type special-shaped beam anchor rope truss roadway support system has the advantages of large surface protecting area and high ...

Large-size freely combined model test device for high ground stress underground engineering

The invention relates to a large-size freely combined model test device for a high ground stress underground engineering, and the device provided by the invention comprises a plurality of split mounting type counter-force jack horse devices, wherein the whole test device has a narrower upper part and a wider lower part; the side face of the whole test device is a slope; each split mounting type counter-force jack horse device comprises a top beam, a side beam and a bottom beam; flanges and high-strength bolts are used for connecting the top beam to the side beam and connecting the side beam to the bottom beam; the counter-force jack horse devices can be connected mutually or be connected to front and back counter-force beams; the upper parts of the front and back counter-force beams are connected to left and right pulling rods while the lower parts of the front and back counter-force beams are connected to a model lifting translation trailer system on the bottom beam; the top beam and the ...

Flexibility uniform distribution pressure loading device applicable to geomechanical model test

The invention relates to a flexibility uniform distribution pressure loading device applicable to a geomechanical model test, comprising a hydraulic cylinder thrustor, wherein the upper end of the hydraulic cylinder thrustor is connected with a hydraulic cylinder by virtue of a spherical hinge, and the bottom of the hydraulic cylinder thrustor is provided with a flexible force-transfer cushion layer. The loading device can be connected with a counter-force frame by virtue of a preposition flange or a postposition flange of a hydraulic cylinder, the maximum load of 50t can be applied, the maximum load intensity on the model surface is 4.5MPa, the load intensity deviation is less than or equal to 5%, the stress on the model surface is uneven, and the depth is less than 100mm. The invention can realize flexible uniform distribution pressure loading on the model surface; the structure is simple, the assembling is flexible, the operation is easy, the size of single loading unit is reasonable ...

Semi-rigid abnormal beam anchor cable truss roadway supporting system

The invention relates to a semi-rigid abnormal beam anchor cable truss roadway supporting system. A metal net is paved on the surface of a roadway, a semi-rigid abnormal beam anchor cable truss is arranged at a coal-rock roof or a roadway side, the semi-rigid abnormal beam anchor cable truss is formed by abnormal beams with semi-rigid nodes and anchor cables or anchor rods, and each abnormal beam is provided with a plurality of anchor cables or anchor rods; the anchor cables and anchor rods are anchored into a rock layer by passing through the abnormal beams and the metal net and apply a prestress to form an extrusion and annular protection function on surrounding rocks; and outer anchor ends of the anchor cables and anchor rods are provided with trays and locks, the trays and the locks make the end heads of the anchor cables or anchor rods tightly matched with the abnormal beams. The invention has the advantages that: (1), the protective surface area is large, the rigidity is high, stability ...

Combined ultrathin flexible uniformly distributed pressure loading device for geomechanical model tests

The invention relates to a combined ultrathin flexible uniformly distributed pressure loading device for geomechanical model tests. The device comprises an ultrathin hydraulic oil cylinder thruster and a combined flexible force transfer cushion layer, wherein the center of the hydraulic oil cylinder thruster is provided with a loading oil cylinder; the top of an oil cylinder piston is provided with a connecting flange; and the bottom of the hydraulic oil cylinder thruster is provided with the combined flexible force transfer cushion layer. The device can be widely applied to the surface loading of various geomechanical model tests, has a simple structure and is flexibly assembled and convenient to operate, a single loading unit has a reasonable size, a hydraulic oil cylinder is a two-way oil cylinder with an oil inlet and an oil outlet, and a hydraulic station and a hydraulic automatic control system are matched to realize loading and unloading; meanwhile, a plurality of loading devices ...

Water circulation system of natural circulation fluidized bed boiler

The invention discloses a water circulation system of a natural circulating fluidized bed boiler, which is characterized in that the inlet end of a convection heating surface inlet header is connected with a distribution header through a first connecting pipe, and the first connecting pipe is a spiral pipe; the outlet end of the convection heating surface outlet header is connected with a boiler top collection header through a second connecting pipe; the inlet end and the outlet end of the in-boiler water cooling wall are connected with a water cooling wall lower collecting box and a water cooling wall upper collecting box respectively, and the outlet end of the boiler top collecting box is connected with the inlet end of the water cooling wall lower collecting box through a first descending pipe. A horizontal partition plate and a spiral flow dividing partition plate are arranged in the horizontal pipe section and the vertical pipe section of the first down pipe respectively, and the horizontal ...

Composite flexible uniform pressure loading device suitable for geomechanical model test

The invention relates to a composite flexible uniform pressure loading device suitable for a geomechanical model test. The device comprises a hydraulic oil cylinder thruster, wherein the upper end of the hydraulic oil cylinder thruster is connected with a hydraulic oil cylinder through a spherical hinge; and a composite flexible power transfer cushion layer is arranged at the bottom of the hydraulic oil cylinder thruster. The device can be widely applied to surface loading of various geomechanical model tests, has a simple structure, is flexible to assemble and convenient to operate and ensures rational size of a single loading unit; the hydraulic oil cylinder is a two-way oil cylinder with an oil inlet and an oil outlet; loading and unloading can be realized by matching a hydraulic station with a hydraulic automatic control system; meanwhile, a plurality of loading devices can be combined in different arrangement modes to realize gradient loading. In the device, the hydraulic oil cylinder ...

Large mechanical test system for combined adjustable constraint concrete arch frame

The invention relates to a large mechanical test system for a combined adjustable constraint concrete arch frame. The system comprises a monitoring system, a hollow cylindrical counter force structure, a hydraulic loading device and an auxiliary loading device, wherein the monitoring system is used for monitoring and collecting arch frame parameters and data. The inner cylindrical surface of the counter force structure is provided with multiple oil cylinder positioning holes, the hydraulic loading device is disposed in the oil cylinder positioning holes, the hydraulic loading device comprises a hydraulic oil cylinder arranged in the oil cylinder positioning holes, a force transmission dispersion device connected with the hydraulic oil cylinder and a control system, and the hydraulic oil cylinder achieves loading through contact of the force transmission dispersion device and an arch frame to be tested. By means of the system, a 1:1 mechanical test can be carried out on the constraint concrete ...

Ultra-thin flexible evenly distributed pressure loading device applicable to geomechanical model tests

The invention relates to an ultra-thin flexible evenly distributed pressure loading device applicable to geomechanical model tests, which comprises an ultra-thin hydraulic oil cylinder thruster and a flexible force transmission cushion layer, wherein a loading oil cylinder is arranged at the center of the hydraulic oil cylinder thruster, a linking flange is arranged at the top part of a piston of an oil cylinder, and the flexible force transmission cushion layer is arranged at the bottom of the hydraulic oil cylinder thruster. The device can be widely applied in surface loading of various geomechanical model tests, the device is simple in structure, flexible for assembly and convenient for operation, a single loading unit is reasonable in size, a hydraulic oil cylinder is a two-way oil cylinder with an oil inlet and an oil outlet, and loading and unloading can be realized by matching with a hydraulic station and a hydraulic automatic control system; simultaneously, a plurality of loading ...

Ultra-thin flexible evenly distributed pressure loading device applicable to geomechanical model tests

The invention relates to an ultra-thin flexible evenly distributed pressure loading device applicable to geomechanical model tests, which comprises an ultra-thin hydraulic oil cylinder thruster and a flexible force transmission cushion layer, wherein a loading oil cylinder is arranged at the center of the hydraulic oil cylinder thruster, a linking flange is arranged at the top part of a piston ofan oil cylinder, and the flexible force transmission cushion layer is arranged at the bottom of the hydraulic oil cylinder thruster. The device can be widely applied in surface loading of various geomechanical model tests, the device is simple in structure, flexible for assembly and convenient for operation, a single loading unit is reasonable in size, a hydraulic oil cylinder is a two-way oil cylinder with an oil inlet and an oil outlet, and loading and unloading can be realized by matching with a hydraulic station and a hydraulic automatic control system; simultaneously, a plurality of loading ...

Concrete-filled steel tube lagging jack with multi-scale textured surface as well as preparation method and application of concrete-filled steel tube lagging jack

The invention discloses a concrete-filled steel tube arch frame with a multi-scale textured surface and a preparation method and application thereof.The concrete-filled steel tube arch frame comprises a steel tube arch frame body, concrete is sprayed to the outer surface of the steel tube arch frame body, a plurality of protruding pieces are arranged on the outer wall face of the steel tube arch frame body at intervals, and each protruding piece is of a cylinder structure with the T-shaped section as a whole; the small-diameter ends of the protruding pieces are connected with the steel pipe arch frame, and the large-diameter ends of the protruding pieces are connected with concrete which is mixed with fibers. The steel pipe arch frames and the protruding pieces are subjected to surface roughening treatment; according to the concrete filled steel tube lagging jack provided by the invention, the bonding reinforced coating is arranged on the surface of the steel tube, roughening treatment ...

Bearing capacity determination method for concrete filled steel tube lagging jack

The invention discloses a bearing capacity determination method for a concrete filled steel tube lagging jack. The method comprises the following steps: step (1): establishing a mechanical calculation model of the concrete filled steel tube lagging jack, wherein the sections taken from the lagging jack are control sections S and the quantity of the sections S is predetermined as t; step (2): calculating the internal force of the ith control section Si, wherein i is greater than or equal to 1 but less than or equal to t; step (3): judging whether the control section Si of the lagging jack reaches the ultimate bearing capacity or not according to a positively eccentric criterion and a negatively eccentric criterion; and step (4): solving the bearing capacity of the concrete filled steel tube lagging jack, wherein the bearing capacity of the concrete filled steel tube lagging jack is the ultimate bearing capacity of the control section Si firstly emerging on the lagging jack; if the Si reaches ...

Pseudo-protogenetic rock mass structural plane splitting generation device and method

The invention discloses a quasi-primary rock mass structural plane cleavage generation device and method.The device comprises cleavage teeth, a check block, a cleavage box, a metal net, a lifting motor, a pressure sensor and a clamping seat, feeding windows are formed in the two sides of the cleavage box, and meanwhile linear sliding rails are fixedly connected to the centers of the two sides in the cleavage box; the linear sliding rails are slidably connected with sliding seats, limiting frames are connected to the sliding seats in an inserted mode, the limiting frames are formed by connecting check blocks corresponding to each other through groove buckles, metal nets are fixedly connected to the check blocks through groove buckles, and a controller and an information transmitter are arranged on the two sides of the top end of the outer portion of the splitting box body. The upper end and the lower end in the splitting box are fixedly connected with a double-shaft motor and a first fixing ...

Boiler tail flue gas waste heat recovery power generation device and use method thereof

The invention belongs to the technical field of boiler flue gas waste heat utilization, and discloses a boiler tail flue gas waste heat recovery power generation device and a using method thereof.The boiler tail flue gas waste heat recovery power generation device comprises a first smoke exhaust pipeline, a second smoke exhaust pipeline and a third smoke exhaust pipeline, and one end of the first smoke exhaust pipeline is used for being connected with the smoke exhaust end of a boiler tail flue; the other end of the first smoke exhaust pipeline is connected with one end of the second smoke exhaust pipeline and one end of the third smoke exhaust pipeline, and the other end of the second smoke exhaust pipeline is connected with an organic Rankine cycle power generation system. A renewable energy heating system used for heating gas in the first smoke exhaust pipeline is arranged on the first smoke exhaust pipeline, a temperature sensor is arranged at the position, close to the other end, of ...

Device and method for monitoring vault caving pressure of tunnel excavation working face

The device for monitoring the vault caving pressure of the tunnel excavation working face is characterized by comprising an anchor head, a steel strand, a steel arch frame and a pressure meter, the anchor head is located at the front end in a hole formed in the tunnel face and provided with an advanced guide pipe, the front end of the steel strand is fixedly connected with the anchor head, and the rear end of the steel strand penetrates through a steel pipe and is fixed to the pressure meter; a bearing mechanism is arranged on the steel strand between the anchor head and the steel pipe, and the anchor head is opened to be fixed in the hole. The monitoring method provided by the invention comprises the following steps of: a) punching a tunnel face; b) placing a monitoring device; c) opening and fixing the anchor head; d) connecting the steel strands; e) monitoring the state of the rock mass; and f) obtaining the pressure of the bearing area. According to the device and method for monitoring ...

Device and method for simulating occlusion type blocky rock mass by using quadrilateral cylinder with concave angle

The invention discloses a device and a method for simulating an occlusion type blocky rock mass by using a quadrilateral cylinder with a concave angle. The method comprises the following steps: step 1, geological exploration; 2, mechanical parameters are obtained; 3, preliminarily determining the size; 4, carrying out numerical simulation; 5, optimizing the size of the concave-angle quadrilateral cylinder; step 6, preparing similar materials; 7, carrying out a model test; step 8, processing and analyzing; according to the method, rock stratum attitude characteristics are obtained through field exploration, then rock mass mechanical parameters are obtained through a test, the size of a concave-angle quadrilateral cylinder used for testing is determined according to the distance and form distribution of geological section structural surfaces, size optimization is conducted, then the tamping assembly is used for tamping materials filled in the main body assembly, and the tamping effect is ...

Kiloton modular combined adjustable self-counter force rack device

The invention discloses a kiloton modular combined adjustable self-counter force rack device. The device has a door-type structure which consists of an assembled gliding soleplate device, upright posts, beams and connecting plates for the upright posts and the beams. The lower ends of the upright posts are fixed on the assembled gliding soleplate device. The symmetric connecting plates for the upright posts and the beams are arranged on the inner sides and the outer sides of the upright posts positioned on the same side of the door-type structure. The upper ends of the upright posts oppositely positioned on the two sides of the door-type structure are connected with the two ends of each of the beams through the connecting plate for the upright posts and the beams. Two ribbed handles connected in parallel are vertically arranged on the connecting plates for the upright posts and the beams, and the two connecting plate for the upright posts and the beams between the inner side and the outer ...

Square steel confined concrete arch center wall back filling bolting-grouting support system and construction method

The invention discloses a square steel confined concrete arch center wall back filling bolting-grouting support system and a construction method. The square steel confined concrete arch center wall back filling bolting-grouting support system comprises high-strength anchor rods, grouting anchor rods, grouting anchor cables and multiple square steel confined concrete arch centers, wherein adjacent square steel confined concrete arch centers are connected through longitudinal beams, anchor rod holes are formed in the longitudinal beams, longitudinal beam anchor rods penetrate the longitudinal beams through the anchor rod holes to be anchored into a surrounding rock, a wall back filling layer is arranged between the square steel confined concrete arch centers and the surrounding rock, and the square steel confined concrete arch centers, the wall back filling layer and the tunnel surrounding rock are connected through the longitudinal beam anchor rods. The high-strength anchor rods, the grouting ...

Composite flexible uniform pressure loading device suitable for geomechanical model test

The invention relates to a composite flexible uniform pressure loading device suitable for a geomechanical model test. The device comprises a hydraulic oil cylinder thruster, wherein the upper end of the hydraulic oil cylinder thruster is connected with a hydraulic oil cylinder through a spherical hinge; and a composite flexible power transfer cushion layer is arranged at the bottom of the hydraulic oil cylinder thruster. The device can be widely applied to surface loading of various geomechanical model tests, has a simple structure, is flexible to assemble and convenient to operate and ensures rational size of a single loading unit; the hydraulic oil cylinder is a two-way oil cylinder with an oil inlet and an oil outlet; loading and unloading can be realized by matching a hydraulic station with a hydraulic automatic control system; meanwhile, a plurality of loading devices can be combined in different arrangement modes to realize gradient loading. In the device, the hydraulic oil cylinder ...

Comprehensive quantitative determination method for grouting reinforcement effect of underground engineering crushed surrounding rocks

The invention discloses a comprehensive quantitative determination method for grouting reinforcement effect of underground engineering crushed surrounding rocks. The method is based on four technological detection meanings, and the four meanings comprise surrounding rock boring coring, detection by a ground penetrating radar, borehole inspection detection and in-situ strength detection on bored surrounding rock. By using the four detection meanings for respective statistics and analysis, the surrounding-rock boring coring enhancement rate, the damage area reinforcing enhancement rate, the crack closing enhancement rate, the strength parameter enhancement rate and other parameters before or after grouting are obtained. The grouting reinforcement effect is subjected to comprehensive quantitative analysis through a weight analysis method, and a quantitative evaluation index for the grouting reinforcement effect is established, and scientific reasonable evaluation is performed on the grouting ...

Flexibility uniform distribution pressure loading device applicable to geomechanical model test

The invention relates to a flexibility uniform distribution pressure loading device applicable to a geomechanical model test, comprising a hydraulic cylinder thrustor, wherein the upper end of the hydraulic cylinder thrustor is connected with a hydraulic cylinder by virtue of a spherical hinge, and the bottom of the hydraulic cylinder thrustor is provided with a flexible force-transfer cushion layer. The loading device can be connected with a counter-force frame by virtue of a preposition flange or a postposition flange of a hydraulic cylinder, the maximum load of 50t can be applied, the maximum load intensity on the model surface is 4.5MPa, the load intensity deviation is less than or equal to 5%, the stress on the model surface is uneven, and the depth is less than 100mm. The invention can realize flexible uniform distribution pressure loading on the model surface; the structure is simple, the assembling is flexible, the operation is easy, the size of single loading unit is reasonable ...

Prestress active support control process for underground excavation underground engineering

The invention discloses a prestress active support control process for underground excavation underground engineering, which belongs to the technical field of underground engineering excavation support and comprises the following steps: determining an excavation disturbance influence range of the underground excavation underground engineering; supporting beams are laid on the earth surface in the trend of the underground engineering to be excavated, and reserved holes are formed in the supporting beams; stratum drill holes are drilled in the range of the to-be-excavated section of the underground excavation underground engineering and in the boundary direction of the peripheral disturbance influence range along the reserved holes, and suspension supporting components penetrate through the reserved holes of the supporting beams and stretch into the bottoms of the stratum drill holes to be installed; the top end of the suspension supporting component is fixed above the supporting beam through ...

Visual test apparatus for permeable grouting of fractured coal rock mass and test method thereof

Long and short anchor cable coordinated energy-absorbing and yielding device and construction method