Prediction method for surrounding rock mechanical behaviors after tunnel excavation under different stratum conditions

The invention discloses a method for predicting the mechanical behavior of surrounding rock after tunnel excavation under different stratum conditions, and the method comprises the following steps: building a numerical model according to the tunnel excavation diameter 2R, the upper soil covering thickness h and a tunnel full-section mode; a Mohr-Coulomb model is adopted for the constitutive relation of the surrounding rock and is used for expressing the plastic flow characteristic of the surrounding rock soil body; the method comprises the following steps: calculating the stress ratio of tunnel surrounding rock to obtain a stress ratio cloud picture, and giving a boundary line with the stress ratio of 1.0 in the stress ratio cloud picture; and drawing a stress ratio curve of the tunnel surrounding rock according to the stress ratio of the tunnel surrounding rock. The method has the advantages that on the basis of numerical simulation software, surrounding rock boundary conditions and constitutive ...

Loading test device

The invention discloses a loading test device. The loading test device comprises a support framework, a positive loading device and a lateral loading device; the support framework comprises a top frame, a base and two vertical side frames; the positive loading device is positioned between the two side frames, the height of the positive loading device is adjustable, and a loading end at the lower part of the positive loading device can move up and down and move little in the side direction; and the lateral loading device is positioned at the lower part of the positive loading device, is connected with the loading end and moves up and down together with the movement of the loading end. Through the loading test device provided by the invention, positive loading and lateral loading can be simultaneously realized for a static or moving device to be tested; and the loading test device has simple structure, is easy to manufacture and operate, and is suitable for testing various vertical lifting ...

一种煤制备橡胶补强填充剂的工艺方法

A reinforcing filler for rubber is prepared from coal through pulverizing to required granularity, and adding chemical assistant to change its physical and chemical properties. Its advantages are high electric insulating performance, good properties and low cost.

Method for crossing active fault to avoid rail damage

The invention relates to the technical field of railway track traffic, in particular to a method for avoiding track damage by crossing a movable fault, which comprises the following steps of: respectively and sequentially arranging a plurality of rows of hydraulic cylinders on two sides and the bottom of a track on one side of the fault; under the working condition that the allowable turning radius, the allowable gradient and the train passing requirements of the rail are met at the same time, the relative horizontal and vertical slippage amount of the fault is sequentially reduced from the fault in an equal difference mode in real time through a hydraulic cylinder, turning and slope slowing treatment is intelligently and automatically conducted on the rail on one side of the fault at the same time, and therefore deformation of steel rails on the two sides of the fault is eliminated; the method has the advantages that when the fault is activated, turning and sloping treatment can be intelligently ...

Horizontal multi-dimensional multi-stage shock absorption and energy consumption rolling support for underground station supporting column

The invention discloses a horizontal multi-dimensional multi-stage damping and energy-consuming rolling support for an underground station supporting column. The horizontal multi-dimensional multi-stage damping and energy-consuming rolling support comprises an upper base plate and a lower base plate. The lower seat plate comprises a lower connecting plate, a rigid supporting plate and a plurality of rigid wear-resistant balls; a plurality of semispherical rolling grooves are distributed in the upper surface of the rigid supporting plate, and the rigid wear-resistant balls are correspondingly mounted in the semispherical rolling grooves; the upper seat plate is provided with a rigid annular fence which extends downwards and sleeves the outer side of the rigid supporting plate, and a plurality of multi-stage anti-seismic dampers are arranged between the rigid annular fence and the rigid supporting plate at intervals in the annular direction. The support has the advantages that when horizontal ...

DCM construction method for offshore deep cement mixing pile with horizontal cantilever

The invention discloses a DCM construction method for an offshore deep cement mixing pile with a horizontal cantilever. The DCM construction method comprises the following steps that a DCM engineering ship is driven to a preset position; based on the stratum distribution data and the design construction coordinates of the cement soil mixing piles, the construction mode of the mixing piles is determined; if the gradient of the rock stratum at the construction position is smaller than a gradient threshold value, a direct stirring construction mode is adopted; if the gradient of the rock stratum at the construction position is larger than a gradient threshold value, a horizontal cantilever reinforcing and stirring construction mode is adopted, specifically, a variable-diameter drill bit mechanism in a drilling machine system is used for downwards stretching into the surface of the rock stratum and drilling to form a conical hole located in the surface of the rock stratum, and a horizontal ...

Soymilk and its fresh-keeping method

Self -adaptation blanking plug

The utility model provides a self -adaptation blanking plug, including elasticity obturating element, elasticity obturating element is along vertical including first side and the second side relative with first side, the second side is compared with first side when placing in treating the plugging hole way and is more approached the pore outside, and obturating element is first radial external dimensions under free state, be the second radial external dimensions bigger than first radial external dimensions under expanded state, this blanking plug still includes the first threaded component of one side male and opposite side and the threaded component of first threaded component complex second in obturating element's first side is inclined from obturating element's first side and the second side with the second, this blanking plug is constructed and is made obturating element expand to the radial external dimensions of second from first radial external dimensions through one in the threaded ...

Telescopic horizontal cantilever slide-resistant pile capable of solving tunnel bias and construction method of telescopic horizontal cantilever slide-resistant pile

The invention discloses a telescopic horizontal cantilever anti-slide pile for solving tunnel bias pressure and a construction method thereof.The telescopic horizontal cantilever anti-slide pile is arranged on the bias pressure side of a tunnel and comprises a vertically-arranged reinforcement cage, a horizontally-arranged telescopic horizontal cantilever and concrete wrapped between the reinforcement cage and the telescopic horizontal cantilever; one end of the telescopic horizontal cantilever is connected with the side wall of the top face of the slide-resistant pile built-in section reinforcement cage, and the other end of the telescopic horizontal cantilever extends towards the lower portion of the tunnel. The cantilever structure has the advantages that the bias pressure part of the rock-soil body can be converted into the vertical load borne by the cantilever structure, and the bias pressure load borne by the tunnel is reduced; the cantilever structure can resist tunnel inverted arch ...

DCM construction method for offshore deep cement-soil mixing pile

The invention discloses a DCM construction method for an offshore deep cement soil mixing pile. The DCM construction method comprises the following steps that a DCM engineering ship is driven to a preset position; based on the stratum distribution data and the design construction coordinates of all the cement soil mixing piles, the construction mode of all the mixing piles is determined, and the construction mode is direct mixing construction or composite reinforcement mixing construction; if the gradient of the rock stratum at the construction position is smaller than a gradient threshold value, a direct stirring construction mode is adopted; if the slope of the rock stratum at the construction position is larger than the slope threshold value, a composite reinforcing and stirring construction mode is adopted, and the composite reinforcing and stirring construction mode is that a variable-diameter drill bit mechanism in a drilling machine system is used for downwards stretching into the ...

Welding-free corrugated plate-sprayed concrete tunnel primary supporting method

The invention discloses a welding-free corrugated plate-sprayed concrete tunnel primary supporting method. The method comprises the steps that a grouting steel pipe is installed and fixed on a steel corrugated plate; excavating a tunnel, and mounting a steel corrugated plate on the surface of tunnel surrounding rock; the reinforcing mesh abuts against the inner wall of the corrugated plate, the end, located on the inner side of the steel corrugated plate, of the grouting steel pipe penetrates through the reinforcing mesh, and the reinforcing mesh is fixed to the inner wall of the corrugated plate through a linear steel sleeve; a sealing piece is installed on a port, located on the inner side of the steel corrugated plate, of the grouting steel pipe, concrete is sprayed on the inner side of the steel corrugated plate, and a concrete surface layer is constructed; and the sealing piece is taken down, grouting is conducted in the gap between the surrounding rock of the tunnel and the steel ...

Construction method of shield negative ring combined duct piece

The invention discloses a construction method of a shield negative ring combined type duct piece. The construction method comprises the steps that the shield negative ring combined type duct piece is installed and dismantled; the installation method of the shield negative ring combined type duct piece comprises the following steps that the duct piece supporting cushion block is installed in a shield tail shell of a shield tunneling machine; the pipe pieces are symmetrically installed on the pipe piece supporting cushion block according to the principle from bottom to top, and a pipe piece ring is formed through assembling; after each segment ring is assembled, the segment rings are pushed out of the shield tail of the shield tunneling machine through a thrust oil cylinder of the shield tunneling machine and pressed on a counter-force frame; and after a cutter head of the shield tunneling machine makes full contact with a tunnel face, the segment ring is tightly jacked, the segment supporting ...

Damping device for dewatering screen

The invention discloses a dewatering screen vibration reduction device which comprises a connecting bolt, an exciting force transmission protruding block and a damping vibration reduction mechanism, a connecting base is fixed to a top transverse plate of a dewatering screen through the connecting bolt, a mounting groove is formed in the top transverse plate, and the exciting force transmission protruding block is correspondingly assembled in the mounting groove; the damping vibration attenuation mechanism comprises a hoop, a forked connecting rod, a stand column and a vibration absorption end, the hoop is fastened to the connecting bolt in a sleeving mode, the forked connecting rod comprises a bent rod and a plurality of branch rods forked from the front end of the bent rod, the branch rods are fixed to the corresponding connecting bolts respectively, and the rear end of the bent rod is connected with the vibration absorption end. The device has the advantages that the exciting force transmission ...

Method for crossing positive and negative active faults to avoid rail damage

The invention relates to the technical field of railway track traffic, in particular to a method for crossing positive and negative active faults to avoid track damage, which comprises the following steps: arranging a hydraulic oil cylinder below a track positioned on a footwall of a fault, and sequentially reducing the relative slippage of the positive and negative faults from the fault in real time in an equal difference manner through jacking of the hydraulic oil cylinder according to the relative slippage of the fault. The method has the advantages that the regulation and control device is only arranged on one side of the fault, the construction and maintenance cost is saved, the method can adapt to large slippage of the forward fault and the reverse fault, the requirement for passing of a train without speed reduction can be met, deformation of the steel rails is eliminated, and the service life of the train is prolonged. And safe operation of the railway and personal safety of passengers ...

Plate and frame type slurry filter press with filter plate unloading assisting mechanism

The invention discloses a plate frame type slurry filter press with a filter plate unloading assisting mechanism. The plate frame type slurry filter press comprises a rack and a plurality of plate frames arranged on the rack at intervals, the interior of a cavity of the plate frame is divided into a filter pressing cavity and a clear water cavity by a vertical filter plate; a foldable dismounting assisting mechanism is arranged in the filter pressing cavity of every two adjacent plate frames, the lower end of each foldable dismounting assisting mechanism is hinged to the corresponding filter plate, the other end of each foldable dismounting assisting mechanism is hinged to a sliding block in a sliding groove of a top plate of the corresponding plate frame, and a connecting rod is fixedly arranged at the front end of each sliding block and horizontally extends to the opposite plate frame to be fixed. The plate frame type mud filter press has the advantages that the plate frame type mud filter ...

Multi-stage deformation yielding device for tunnel steel arch adaptive to large deformation of surrounding rock

The invention discloses a multi-level deformation yielding device for a tunnel steel arch suitable for large deformation of surrounding rocks, a plurality of multi-level deformation yielding devices are arranged on the steel arch in a surrounding rock tunnel at intervals, the steel arch is composed of a plurality of steel arch assemblies, and every two adjacent steel arch assemblies are connected through the corresponding multi-level deformation yielding device; the multi-stage deformation yielding device comprises a box body, a steel cover plate, steel pressing plates and a multi-stage deformation spring, the box body is hollow, the two sides of the box body are not covered, the steel pressing plates and the multi-stage deformation spring are arranged in the box body, and the two ends of the multi-stage deformation spring are each provided with one steel pressing plate. The lower ends of the multi-stage deformation springs are fixedly connected with one steel pressing plate, the upper ...

Multi-dimensional graded shock absorption and energy consumption anti-seismic joint device

The invention discloses a multi-dimensional graded shock absorption and energy dissipation anti-seismic joint device which is arranged in an anti-seismic joint between beams or between plates and comprises a base, a cover plate and a plurality of multi-stage anti-seismic dampers. The base comprises two base plates which are oppositely arranged, and the base plates are arranged along the anti-seismic joint; the multi-stage anti-seismic dampers are distributed at intervals in the longitudinal direction of the base plate, and the two ends of each multi-stage anti-seismic damper are hinged to the base plate. The upper end face and the lower end face of the base are each provided with a cover plate in a packaging mode. The multi-stage anti-seismic damper has the advantages that under different stages of earthquakes, the purpose of automatic graded damping and energy consumption can be achieved through the multi-stage anti-seismic damper; the multi-stage anti-seismic damper occupies a small space ...

Method for crossing horizontal active fault to avoid rail damage

The invention discloses a method for crossing a horizontal active fault to avoid rail damage, which is characterized in that a rail intelligent control slip structure is arranged on one side of the fault, the relative slip amount of the fault is sequentially reduced from the fault at equal difference in real time through a hydraulic cylinder according to the real-time monitored relative slip amount of the fault, and an upper rail on one side of the fault is automatically turned. The method has the advantages that when the fault is activated, the upper rail on one side of the fault is intelligently and automatically turned in real time, the method can adapt to large slippage of the fault, the passing requirement of a train is met, the train can pass without speed reduction, the deformation of the steel rails is eliminated, and the rail cannot be damaged, so that the maintenance cost is saved; and safe operation of the railway and personal safety of passengers can be ensured.

Multi-dimensional and multi-level shock absorption and energy consumption rolling support for underground structure supporting column

The invention discloses a multi-dimensional and multi-level damping and energy dissipation rolling support for an underground structure supporting column. The multi-dimensional and multi-level damping and energy dissipation rolling support comprises an upper seat plate fixed to the lower surface of a top beam and a lower seat plate fixed to the upper surface of the supporting column. The lower seat plate comprises a lower connecting plate, a rubber block, a rigid supporting plate, a plurality of vertical multi-stage anti-seismic dampers, a plurality of horizontal multi-stage anti-seismic dampers and a plurality of rigid wear-resistant balls; the upper seat plate is provided with a rigid annular fence arranged on the outer side of the rigid supporting plate in a sleeving mode, a plurality of horizontal multi-stage anti-seismic dampers are installed between the rigid annular fence and the rigid supporting plate in the annular direction, and a circle of vertical multi-stage anti-seismic dampers ...

Multi-dimensional shock absorption and energy consumption rolling support for underground structure supporting column

The invention discloses a multi-dimensional damping energy dissipation rolling support for an underground structure supporting column, which is arranged between a top beam and the supporting column and comprises an upper seat plate and a lower seat plate, the upper seat plate is fixed on the lower surface of the top beam, and the lower seat plate is fixed on the upper surface of the supporting column; the lower seat plate comprises a lower connecting plate, a rubber block, a rigid supporting plate, a vertical damping spring, a horizontal damping spring and a rigid wear-resistant ball; the upper seat plate is provided with a rigid annular fence arranged on the outer side of the rigid supporting plate in a sleeving mode, a plurality of horizontal damping springs are annularly arranged between the rigid annular fence and the rigid supporting plate, and a circle of vertical damping springs are annularly distributed on the outer side of the rubber block. The support has the advantages that when ...

Loading test device

Automatic mud cake falling-off device of filter press and working method of automatic mud cake falling-off device

The invention discloses a filter press mud cake automatic falling device and a working method thereof.The device is arranged on a dewatering screen and comprises a fixing plate connected with a side plate of the dewatering screen and a plurality of lever type vibration amplifying devices installed on the fixing plate; the lever type vibration amplifying device comprises a support installed on the ground and a supporting rod rotationally connected with the support, the end, facing the dewatering screen, of the supporting rod is connected with the fixing plate through a spring, and the end, back to the dewatering screen, of the supporting rod is connected with a metal ball which is placed on the top of a filter plate of the filter press. The supporting rod is divided into a first force arm rod and a second force arm rod by the support, the first force arm rod faces the dewatering screen, the second force arm rod is arranged back to the dewatering screen, and the first force arm rod is longer ...

Horizontal multi-dimensional shock absorption and energy consumption rolling support for underground subway station supporting column

The invention discloses a horizontal multi-dimensional shock absorption and energy dissipation rolling support for an underground subway station supporting column. The horizontal multi-dimensional shock absorption and energy dissipation rolling support comprises an upper seat plate fixed to the lower surface of a station top beam and a lower seat plate fixed to the upper surface of the supporting column. The lower seat plate comprises a lower connecting plate, a rigid supporting plate and a plurality of rigid wear-resistant balls, and the rigid wear-resistant balls are correspondingly mounted in the hemispherical rolling grooves of the rigid supporting plate; a rigid annular fence is arranged on the outer side of the rigid supporting plate, and a plurality of high-elasticity damping springs are evenly distributed between the rigid supporting plate and the rigid annular fence in the annular direction. The support has the advantages that when horizontal earthquake force and the running direction ...

Convenient construction method for partition wall of gravel bin of mixing plant

The invention discloses a convenient construction method for a mixing plant sandstone bin partition wall, which comprises the following steps: clearing up a site, and hoisting a prefabricated base to the setting position of the mixing plant sandstone bin partition wall; the prefabricated base and an underground rock-soil layer are anchored through twisted steel; the first section of sectional wall body is installed in a sliding groove of the prefabricated base and pushed to the corresponding position in the length direction of the sliding groove; the second section of the sectional wall body is installed in the sliding groove of the prefabricated base, the second section of the sectional wall body is pushed to move, and a concave-convex matching structure is formed between the second section of the sectional wall body and the first section of the sectional wall body; and the steps are repeated until all the sectional type wall bodies are installed, and a mixing plant sandstone stock bin ...

Multi-functional intelligent switch controller operating device

The invention relates to a multi-functional intelligent switch controller operating device and belongs to the field of power supply units. The device comprises a telescopic main operating rod, wherein a connecting sleeve is arranged on the top of the telescopic main operating rod, a triangular bolt operating head is arranged on the top of the connecting sleeve, a supporting separation blade is fixed between the triangular bolt operating head and the connecting sleeve, the included angle between the supporting separation blade and the connecting sleeve is 90 degrees, the included angle between the supporting separation blade and the triangular bolt operating head is 90 degrees, a U-shaped control knob operating head and an L-shaped auxiliary drag hook piece are arranged on the side face of the connecting sleeve, the U-shaped control knob operating head and the supporting separation blade are oppositely arranged, the included angle between the U-shaped control knob operating head and the ...