52results about How to "Increase anchoring force" patented technology

The utility model provides an anchoring device for preventing landslide geological disasters, and relates to the technical field of anchoring equipment, the anchoring device comprises an anchor rod assembly, a transmission assembly is arranged in the anchor rod assembly, the transmission assembly comprises a lead screw rotationally connected to the inner wall of the anchor rod assembly, and the upper end of the lead screw penetrates through the top surface of the anchor rod assembly. According to the anchoring device for preventing the landslide geological disaster, a sliding block and a first trapezoidal block can be driven to extrude a second trapezoidal block through rotation of a lead screw, and then the second trapezoidal block drives a push plate and a spine block to move towards the outer side of an anchor rod body till the push plate and the spine block are inserted into soil; the firmness of the device is effectively improved by inserting the push plate and the spine blocks into soil, the anchoring capacity is improved, the device can rapidly anchor the protective net and the protective plate, the anchoring effect is good, and practicability is high.

The invention belongs to the technical field of slope supporting, discloses a slip-releasing slope surface supporting method based on a grouting steel pipe pile-lattice beam pre-stressed anchor cable, and aims to solve the problem that in an existing supporting system, a grouting steel pipe pile cannot provide enough shear capacity for a soil body around the pre-stressed anchor cable. The method comprises the following steps: (1) slope treatment; (2) surveying and setting out are conducted, and the positions of the pre-stressed anchor cables and the grouting steel pipe piles are determined; the pre-stressed anchor cables and the grouting steel pipe piles are arranged in a staggered mode. (3) pre-stressed anchor cables and grouting steel pipe piles are constructed; the pre-stressed anchor cables and the grouting steel pipe piles are arranged in the rock-soil body in the direction perpendicular to the slope surface of the side slope. And (4) lattice beam construction, wherein each connecting node of the lattice beam corresponds to a pre-stressed anchor cable or a grouting steel pipe pile. By changing the arrangement mode of the grouting steel pipe piles, the grouting steel pipe piles can provide more shear resistance for soil around the pre-stressed anchor cables, and then the stability of slope supporting is improved.

The invention relates to an improved novel wall connecting piece, and relates to the technical field of building construction, the improved novel wall connecting piece is mounted on a wall template so as to be conveniently embedded in a wall, the wall connecting piece comprises a connecting piece inserted into the wall template, the connecting piece penetrates through the wall template so as to form an overhanging end on the inner side of the wall template, and the overhanging end is connected with the wall template through a connecting rod. A connecting end is formed on the outer side of the wall formwork, the width of the end, away from the wall formwork, of the anchoring part is enlarged to form an anchoring part expanding head, more contact parts are increased during concrete pouring through the anchoring part expanding head, and after the concrete is completely dried to form the wall, the anchoring part expanding head is expanded to form the anchoring part. The anchoring part can generate a larger contact area during concrete pouring, then the connecting part is connected with the anchoring part, the anchoring part expanding head is reliably connected with the wall body, and the connecting effect is improved by generating more contact parts between the anchoring part expanding head and the wall body; and the wall connecting piece cannot deviate or fall off in the concrete pouring and vibrating operation process.

The invention discloses an inorganic facing layer thermal insulation decorative plate and an outer wall external thermal insulation system, belongs to the technical field of outer wall thermal insulation decorative plates, and aims to overcome the defects that a decorative panel in an existing thermal insulation decorative plate is easy to fall off from an outer wall and the anchoring force is small. The heat preservation plate and the decorative surface layer are connected together through the inorganic composite layer, the multiple built-in anchor rods are arranged in the middle area of the heat preservation plate, and the anchor plates fixedly connected with the built-in anchor rods are arranged in the inorganic composite layer or the decorative surface layer, so that inorganic bonding of the decorative surface layer and the heat preservation plate is achieved, and meanwhile the heat preservation plate and the decorative surface layer are bonded together. Connecting points for anchoring the insulation board are arranged on the inner side face of the insulation board, anchoring connection of the middle area of the insulation board is achieved, and the safety performance of the insulation decorative board is improved.

The utility model relates to an assembly type building supporting seat which effectively solves the problem that contradiction exists between the requirement for large anchoring force and the requirement for easy disassembly of an anchoring part. According to the technical scheme, the device comprises a bottom plate, a top plate and a plurality of anchoring units, each anchoring unit comprises a vertical anchor rod and two arc-shaped racks, the anchor rod penetrates through the top plate and the bottom plate, the two arc-shaped racks are symmetrically arranged on the two sides of the anchor rod in a left-right mode, one end of each arc-shaped rack is hinged to the bottom plate through a connecting arm, and a hinge shaft is coaxial with the arc-shaped racks; the left side and the right side of a rod body of the anchor rod are each fixedly provided with a straight rack, when the anchor rod moves downwards, the two straight racks can be meshed with the arc-shaped racks on the same side to drive the arc-shaped racks to rotate, the anchor rod is vertically inserted into a soil body, and the two arc-shaped racks can be inserted into the soil body along a circular track; the anchor rod can be pulled out with small pulling force when the anchor rod is dismantled while larger anchoring force is provided, and therefore the problem of contradiction between the anchoring force and the pulling force when the anchor rod is dismantled is solved.

The utility model relates to the technical field of building wall fixing tools, in particular to a combined heat preservation nail which comprises a sleeve, an anchor disc fixedly connected to one end of the sleeve, an expansion pipe detachably connected to the other end of the sleeve, an expansion screw expansion plug connected to one end of the expansion pipe in a sliding mode in the axial direction, and a screw rotationally arranged on the anchor disc, the sleeve and the expansion pipe in a penetrating mode. The screw rod penetrates through the expansion screw expansion plug in a threaded mode, and the expansion screw expansion plug is used for forcing the expansion pipe to expand. The expansion pipe and the sleeve are detachably connected, split installation of the expansion pipe and the sleeve is achieved, the sleeve or the expansion pipe with the adaptive length is installed according to a construction site, the overall length of the heat preservation nail can be adjusted, and the damaged expansion pipe or the damaged sleeve can be replaced conveniently.

The utility model discloses a sheet pile supporting structure which comprises supporting sheet piles used for supporting the wall of a foundation pit, supporting enclosing purlins used for supporting a plurality of adjacent supporting sheet piles at the same time and positioning sheet piles fixed to the periphery of the foundation pit, and the positioning sheet piles pull the supporting enclosing purlins through tension lines. And each supporting enclosing purlin is pulled by a group of positioning sheet piles through a group of tensioning wires. According to the utility model, the tensioning line is connected to the outer side of the supporting sheet pile to realize traction of the supporting sheet pile, so that a supporting system is prevented from being arranged in a foundation pit.

The invention relates to static sounding equipment capable of being used for special scenes and a sounding method.The static sounding equipment comprises a probe rod, a probe, a telescopic clamping rod assembly, a driving mechanism, a ground anchor, a probe rod automatic loading and unloading assembly and a power supply assembly, the ground anchor is fixed to the top of a bank slope, and the driving mechanism is arranged on the side edge of the offshore side of the ground anchor; the telescopic clamping rod assembly is installed at the driving end of the driving mechanism, the probe rod can be installed on the offshore side of the telescopic clamping rod assembly through the probe rod automatic assembling and disassembling assembly, the driving mechanism can drive a probe to ascend and descend, and the power supply assembly is electrically connected with the driving mechanism. The probe rod is installed on the offshore side of the telescopic clamping rod assembly through the probe rod automatic loading and unloading assembly, the probe rod and the probe are driven by the telescopic clamping rod assembly to move to the position above a target detection point, the probe rod and the probe are driven by the driving mechanism to ascend and descend, detection point exploration testing of special terrains is achieved, the testable range is enlarged, and the testing efficiency is improved. The probe rod is automatically assembled and disassembled through the probe rod automatic assembling and disassembling assembly, and the safety of operators is guaranteed.

The utility model discloses a kind of steel wire rope anchoring devices for cantilevered scaffold, including connecting piece, connecting piece includes screw rod, the front end of screw rod is provided with protruding head, pre-buried sleeve is set on the outside of connecting piece, pre-buried sleeve includes thread section and expansion section, expansion section is located at the front end of pre-buried sleeve, expansion section outside is embedded with clamping plate, steel wire rope connecting block is set in the rear end of screw rod, steel wire rope connecting block includes pressing block and shell, pressing block is set in the inside of shell, spring b is arranged between the bottom of pressing block and shell.The utility model is pressed by pressing steel wire rope connecting block, steel wire rope passes, pressing block is lifted under the action of spring b, so that steel wire rope is clamped by shell and pressing block, so that connecting block can adapt to steel wire rope of different diameters, effectively prevent steel wire rope from sliding, and the expansion joint of expansion section and clamping plate design enhances anchoring force and adapts to concrete slight deformation, improves stability.

The FRP rod type combined tie piece comprises a five-direction communicating structural piece, a reinforcing steel bar bolt and a fiber reinforced composite material rib, the five-direction communicating structural piece comprises two horizontal connecting pipes which are perpendicular to each other, and a vertical connecting pipe is arranged at the communicating point of the two horizontal connecting pipes; the two ends of the fiber reinforced composite material rib are inserted into the vertical connecting pipes of the two five-way communicating structural parts respectively and are fixedly connected with the five-way communicating structural parts in an inserted mode through the reinforcing steel bar plug pins, and the combined tying part is formed. In practical application, leaf plate steel bars of the sandwich thermal insulation wallboard directly penetrate into the two horizontal connecting pipes which are vertically arranged to form a binding-free three-dimensional steel bar net rack, and after concrete is poured, the pulling pieces and the concrete form a composite stress body through the occlusion effect of aggregate. In the building construction process, the construction efficiency is improved, the anchoring problem of the tie piece is solved, the overall mechanical property of the sandwich heat preservation wallboard is guaranteed, and the FRP tie piece has important significance for overcoming the defects of a common commercial FRP tie piece.

The utility model relates to the field of underground coal mine fully mechanized coal mining face and crossheading mining and conveying, in particular to a belt self-moving tail with a modularized anchoring mechanism, which mainly comprises a head end frame, the anchoring mechanism, a base frame and a tail end frame. A group of anchoring mechanisms are respectively arranged on the left side and the right side of the head end and the tail end frame of the belt self-moving machine tail, a pin connection structure is adopted, the disassembly and assembly are more convenient, the problem that the belt self-moving machine tail is pulled back when a reversed loader moves forwards is solved, and meanwhile, an anchoring part of each anchoring mechanism adopts a universal structure and can rotate by 360 degrees so as to adapt to non-uniform stress caused by unevenness of a gate road top plate.

The invention discloses an ecological slope protection supporting structure for hydraulic engineering, and relates to the technical field of hydraulic engineering, the ecological slope protection supporting structure comprises a concrete plate arranged at the top of a slope surface, the top and the bottom of the concrete plate are provided with an insertion hole and a resistance plate mounting groove respectively, and an auxiliary resistance plate is movably inserted into the inner wall of the resistance plate mounting groove; a bearing insertion hole is formed in the top of the slope surface, an insertion cylinder is movably inserted into the inner wall of the bearing insertion hole, and a positioning cylinder movably connected to the top of the insertion cylinder in a sleeving mode is fixedly connected to the center of the bottom of the auxiliary resistance plate. By rotating the single center adjusting column, the conical arc plate at the bottom can be synchronously driven to form a pile head, the transverse moving conical rod in the middle can be synchronously driven to penetrate in the radial direction, the anchoring arc rod on the upper portion can be synchronously driven to expand in the circumferential direction, and multi-layer and three-dimensional anchoring from deep to shallow and from the radial direction to the circumferential direction is achieved. Due to the synergistic effect, the overall anchoring force, pulling resistance and shearing resistance of the structure are greatly enhanced, and instability and landslide of the slope protection structure are effectively prevented.

The utility model discloses an anti-pulling and anti-compression prestressed jet expansion frustum press-grouting pile. The press-grouting pile is composed of a pile body and a prestressed rod body combined component located in the pile body. The pile body comprises a pile cap and a pile body which are of an integrated structure, at least three rib plates are arranged on the peripheral face of the pile body, and at least one double-frustum expanding body is arranged below the pile body. The prestressed rod body combined component comprises a rod body tensioning end component, a rod body steel pull rod component and a rod body anchoring end component which are sequentially connected from top to bottom. The pile type can be used for an uplift pile and an uplift and compression resistant pile, and is high in bearing capacity, small in deformation and low in manufacturing cost; the prestress is applied at the top of the pile, so that cross construction of raft plates is avoided, and the construction period is shortened; a pile cap is arranged at the top of the pile to prevent local compression damage of pile end concrete during prestress tensioning; the pile end is of a bottom anchor type structure, and stress is reasonable; the steel pull rod in the double-frustum expanding body is sleeved with the external thread anchoring steel pipe and filled with the high-strength grouting material, corrosion resistance is good, and anchoring is stable and reliable.

The present invention relates to a multifunctional drainage hole orifice device that is adaptive to irregular hole wall structures. The orifice device includes a main pipe, an end cover, a pressure ring and a pressure cover. The main pipe is provided with an end cover at one end and a pressure cover at the other end. A plurality of pressure rings are sleeved on the main pipe, and the plurality of pressure rings are arranged between the end cover and the pressure cover. Rubber rings and water-expandable water-stop rings are alternately arranged between adjacent pressure rings. The present invention solves a series of problems that the existing orifice device is not adapted to irregular hole wall structures, has a single purpose, is not adaptable, is inconvenient to install, has insufficient anchoring force, has a small flow area, and is inconvenient to repair. Compared with the existing drainage hole orifice device, the present invention is adapted to various irregular hole wall structures and has a good water-stopping effect. A plurality of water-expandable water-stop rings are used to replace elastic rubber rings. When there is water in the drainage hole, the water-expandable water-stop ring will further expand fully to actively fill the irregular gaps, ensure close contact with the irregular hole wall, and exert a good water-stopping effect.

The utility model relates to the technical field of hexsteel, in particular to a hexsteel high-temperature wear-resistant composite layer which comprises a framework and a wear-resistant coating, the framework is composed of a first hexsteel structure and a second hexsteel structure, the wear-resistant coating is made of fire-resistant paint, and the second hexsteel structure is located on the outer side of the first hexsteel structure. Fixing blocks are arranged at the ends, close to each other, of the first hexsteel and the second hexsteel, clamping grooves are formed in the ends, close to each other, of the two fixing blocks, reinforcing blocks are arranged at the ends, close to each other, of the first hexsteel and the second hexsteel, and connecting grooves are formed in the two ends of the first hexsteel and the two ends of the second hexsteel; the outer side of the first hexsteel and the outer side of the second hexsteel are each wrapped with a fireproof layer, the fireproof coating is located on the outer side of the fireproof layer, the fireproof layers, the fireproof coating, the first hexsteel and the second hexsteel form a composite layer, and compared with an existing hexsteel, the overall practicability of the hexsteel can be improved through the design.

This invention relates to the field of construction, specifically to a method for constructing a pressure-bearing composite chamber anchor bolt, comprising the following steps: S1, locating drilling points in the soil layer; S2, drilling holes in the soil layer; S3, placing the anchor bolt into the drilled hole; S4, grouting the chamber of the anchor bolt to expand it, and grouting into the drilled hole; S5, after grouting, applying prestress to the anchor bolt; S6, completing the construction. This invention can calculate the optimal prestress locking value applied to the anchor bolt under different working conditions during anchor bolt construction, thereby maximizing the strength and durability of the anchor bolt.

The present invention provides a mixed reinforced prefabricated pile and a production method thereof, comprising a concrete pile body and a pile end anchor plate; the concrete pile body is provided with prestressed steel bars, non-prestressed steel bars and spiral stirrups; the spiral stirrups are wound around the prestressed steel bars and non-prestressed steel bars to form a steel skeleton cage, and the concrete wraps the prestressed steel bars, non-prestressed steel bars and spiral stirrups; the pile end anchor plate is at least provided at one end of the concrete pile body, and the end of the prestressed steel bar is connected to the pile end anchor plate; at least one end of the non-prestressed steel bar is provided with a connecting piece; the non-prestressed steel bar is anchored to the concrete or connected to the pile end anchor plate through the connecting piece. The present invention reduces the deformation of the end of the pile under horizontal bearing capacity, improves the rigidity of the end, has the characteristics of simple structure, high pull-out resistance and horizontal bearing capacity, low cost, high construction efficiency, etc., and can effectively improve the displacement ductility of the pile body and the quality of the connection between piles.

The utility model relates to the field of handrails, in particular to an all-glass handrail which comprises a clamping mechanism. A fixing mechanism is arranged at the upper end of the clamping mechanism, a glass body is arranged at the upper end of the fixing mechanism, and a protection mechanism is arranged on the side wall of the glass body. The anti-pulling capability is remarkably improved through the clamping mechanism, the maintenance cost is reduced through the fixing mechanism, and the problems that in the prior art, a device is usually fixed through glass cement or a simple metal clamp, the connecting strength of glass and the ground or a stand column is limited, the edge is prone to cracking due to stress concentration or tiny vibration, and the service life is short are solved. The problems of complex process and high construction precision requirement, the overall structure needs to be dismantled during later maintenance or glass replacement, the cost is high, and a metal frame or a clamp shields sight lines, so that the transparency of the glass handrail and the overall attractiveness of a building are influenced are solved.

The utility model discloses a large-gradient curved surface side slope base layer fixing structure, and particularly relates to the technical field of side slope protection, the large-gradient curved surface side slope base layer fixing structure comprises a side slope soil layer, an anchor rod is arranged in the side slope soil layer, one end of the anchor rod is arranged as an anchoring end, the other end of the anchor rod is arranged as an exposed end, and a reinforcing mechanism is arranged on one side of the anchor rod. The reinforcing mechanism comprises a plurality of expansion heads fixedly arranged outside the anchor rods, a plurality of geocells are arranged on one side of the slope soil layer, a plurality of through holes are formed in the surfaces of the geocells and connected with the anchor rods in a matched mode, and a plurality of connecting grooves and a plurality of connecting blocks are arranged on the side faces of the geocells. The earthwork standard rooms are connected in a matched and clamped mode through the connecting grooves and the connecting blocks. The expansion head of the anchor rod increases anchoring force, connection is convenient through the exposed end, stability is enhanced, installation is convenient, meanwhile, rain wash is reduced through the plant fiber blanket, stability and ecological restoration are both considered, and the stability of the slope structure is enhanced.

The present application provides an ecological slope protection system and a construction method thereof, the ecological slope protection system comprising an interface treatment layer, a frame structure layer, an ecological substrate layer and a vegetation layer, the interface treatment layer being arranged on a slope surface; the frame structure layer being arranged on the interface treatment layer, the frame structure layer being formed by splicing a plurality of frame units, each frame unit comprising a frame body, the frame body being a hexagonal structure, a tenon or a groove being arranged on the outer side wall of each side, any two adjacent frame units being connected through the tenon and the groove, and a filling layer being arranged in each frame body; the ecological substrate layer being laid on the frame structure layer; and the vegetation layer being formed by growing plant seeds sowed on the ecological substrate layer. The present application can make the ecological slope protection system have reliable structural stability and the ability to flexibly adapt to slight deformation.

The application relates to a tunnel anchor cable based on a hot-melt structure, which at least comprises a monitoring part for monitoring anchoring force of the anchor cable, the monitoring part is installed on an anchor cable bundle, which at least comprises a strain sensor for monitoring and transmitting stress change data of the anchor cable bundle; a sampling period of the strain sensor is set according to a preset strain amplitude corresponding to stress change of the anchor cable bundle; in the process of recovering the anchor cable bundle, time-related stress change information of the anchor cable bundle is recorded and transmitted through the strain sensor with the preset strain amplitude of the anchor cable bundle as a starting event.

The present application relates to a tunnel hot melt anchor cable recovery method, comprising: filling and packaging hot melt reagent in the shell; install heating assembly to the shell, and make it in physical contact with the hot melt reagent; the shell is clamped to the anchor cable bundle, and the working of the heating assembly is controlled by the controller; the heating assembly is controlled to implement physical heating to the hot melt reagent, so that the hot melt reagent releases chemical reaction heat; the hot melt reagent is contacted with the anchor cable bundle to melt the anchor cable bundle by means of chemical reaction heat and recycle. It also includes: install monitoring and grouting to the anchor cable bundle; the stress change of the anchor cable bundle is monitored in real time through the strain sensor of the monitoring part; when the anchoring force of the anchor cable bundle is lower than the set threshold, secondary grouting is carried out to the anchor cable through the grouting part. The recovery method of the present application can realize the recyclability of the anchor cable and the anchor rod, and can reduce the consumption of materials and reduce the engineering cost.

This invention discloses a method for constructing lateral side openings in TBM tunnels under complex geological conditions, aiming to solve the technical problems of poor safety and low efficiency in traditional construction methods under complex geological conditions. Before constructing the side opening, a three-dimensional geological model is built and a warning threshold is set. When the detected data exceeds the warning threshold, an alarm is triggered and construction parameters are adjusted. A folding sliding track equipped with excavation equipment is deployed near the TBM equipment on the side of the side opening to be excavated. Small guide pipe holes and anchor bolt holes are drilled along the outer side of the excavation outline at the designed opening location of the side opening. After installing a double-section H175 steel arch frame optimized by finite element topology, shotcrete is used to seal and form a locking structure. Once the locking structure reaches the design strength, the side opening is excavated from the inside of the locking structure using a partitioned-step coupled excavation algorithm, and unbonded anchor cables are installed at the edge arch of the excavated side opening area. This method makes the excavation of side openings in complex geological environments extremely safe and efficient.

The utility model discloses a TBM driving anchor rod positioning device, including anchor rod, the outer wall of anchor rod is provided with screw threads, and the inner chamber of anchor rod is hollow setting, the bottom welding of anchor rod has the anchor head, the outer wall of anchor head is seted up and has vertical strip through -hole, the inner chamber of anchor head is hollow setting, and the bottom setting of anchor head is concave, and the outer wall of anchor head is fixedly connected with the positioning structure. The device is applied to the positioning link of anchor rod during TBM driving, ensures that the anchor rod is in the middle, the positioning structure can prevent the anchor rod from deviating or contacting the hole wall in the grouting process, avoids forming " dry hole section " to cause grouting not to be dense, improves the uniformity of anchoring force, and the central anchor rod makes the slurry evenly wrap the pole body, forms the complete anchoring body, and the standard preparation work and operation process are the basis of grouting anchor rod construction, and through the vertical strip through -hole of anchor head and hollow setting, the grouting quality is optimized.

The utility model relates to the technical field of geotechnical engineering side slope reinforcement, disclose a kind of geotechnical engineering side slope reinforcement device, including multiple reinforcing plates, the reinforcing plate left side outer wall is fixedly connected with two connecting blocks, the reinforcing plate right side outer wall is fixedly connected with two fixed blocks, the fixed block inside is provided with installation assembly, the reinforcing plate bottom is fixedly connected with multiple tapers, the taper inside is provided with extension assembly, the installation assembly includes sliding plate, the sliding plate outer wall slidingly connects in the connecting block inside, the sliding plate outer wall is fixedly connected with two ropes, the rope is fixedly connected with limit block one on the side away from the sliding plate, in the utility model, the synergies of sliding plate, rope, clamping block and spring one, the quick splicing of reinforcing plate is realized.When installing, clamping block is automatically slid under extrusion, after being inserted in place, spring one releases potential energy to complete clamping;When removing, sliding plate can be separated by pulling.

The application provides a garden greening ground insertion type sprinkling device, which comprises a sprinkler and a ground insertion device. The sprinkler is provided with a hollow rod, the hollow rod is provided with a water inlet and a water nozzle in communication, and the lower end of the sprinkler is provided with an anchor insertion part. The ground insertion device comprises a base sleeve, the lower side end of the base sleeve is centrally provided with a lower insertion part, the lower insertion part is inserted into a soil layer, the lower insertion part is centrally provided with a first adaptive slot hole, the base sleeve is internally provided with an adaptive sleeve, the adaptive sleeve is centrally provided with a second adaptive slot hole, the first adaptive slot hole and the second adaptive slot hole are in communication and alignment, and the lower end of the anchor insertion part penetrates through the second adaptive slot hole and the lower insertion part to be inserted into the soil layer, thereby solving the problem that the existing lower insertion type sprinkler is difficult to be inserted tightly.

The present invention discloses an umbrella-shaped electric anchor rod, comprising an anchor rod body, a rotating motor, an electric push rod assembly, an expansion assembly, an anchor head, a mud bin, a spiral push rod and a mud channel, wherein the mud bin is arranged inside the anchor rod body, the anchor head is arranged at the front end of the anchor rod body, the mud channel is arranged outside the anchor head, the rotating motor is arranged inside the rear end of the anchor rod body and is connected to the spiral push rod, the electric push rod assembly and the expansion assembly are both arranged outside the anchor rod body, and the electric push rod assembly is connected to the expansion assembly. The expansion process of the expansion rod of the anchor rod of the present invention is completely completed by the electric system, which greatly saves construction time and manpower. Even in a relatively hard soil layer, the construction can be easily completed, and the work efficiency is improved. The electric push rod assembly not only provides thrust for the expansion assembly, but also bears a part of the shear force, thereby enhancing the overall stability of the anchor rod. The thorn design on the first push rod makes the anchor rod more stable in the soil layer and not easy to slide or loosen.

The invention relates to a municipal engineering deep foundation pit supporting structure and a construction method, and relates to the technical field of geotechnical engineering and building construction, and the municipal engineering deep foundation pit supporting structure comprises a supporting pile assembly, a waterproof curtain assembly, a retention wall, an inner supporting assembly and an anchor cable assembly. The supporting pile, the waterproof curtain, the anchor cable, the inner support and the retention wall are integrated into an organic integral supporting system; the support piles and the occlusion waterproof curtains form a first'structure-waterproof 'integrated defense line; the anchor cables and the inner supports provide horizontal resistance in stages and areas according to the excavation depth, and a composite supporting mechanism of pulling first and then jacking and combining rigidity and softness is formed; according to the multi-fortification system, the overall stability and safety redundancy of deep foundation pit engineering are greatly improved, and various complex working conditions and accidental loads can be effectively dealt with.

The present invention provides a columnar specimen fatigue test loading device, which belongs to the field of material testing devices, and includes: a load transfer member, a first limit end is arranged in the middle of its inner wall; a force member, the outer diameter of which matches the inner diameter of the load transfer member, and a second limit end is arranged on its inner wall; one end of the force member is detachably connected to the load transfer member, and the other end is provided with a through hole; the first limit end and the second limit end are both truncated cone structures with cavities; a clamping assembly, which includes two symmetrically arranged clamping blocks; when the clamping assembly is used, it is located between the load transfer member and the force member, and when a columnar specimen is clamped between the two clamping blocks, the two clamping blocks form a spindle-shaped structure, and at this time, the two side conical surfaces of the spindle-shaped structure formed by the two clamping blocks are respectively abutted against the inner walls of the first limit end and the second limit end. The device can ensure uniform stress distribution at the ends of the columnar specimens in fatigue tests, and avoid brittle failure caused by concentrated force at the ends of the columnar specimens.

The utility model discloses a kind of reinforced self-tapping anchorage devices of building outer wall in situ repair, it is related to the field of fastener technology, it includes anchoring sleeve pipe and anchoring bolt, anchoring sleeve pipe includes expansion section and straight section, expansion section is opened with expansion fissure along length direction, expansion section is equipped with lining boss cover, linear slit is opened with length direction on lining boss cover, support ring is equipped with on the both sides of linear slit, straight section and expansion section outer wall are provided with boss structure along circumference, anchoring bolt outside is equipped with anti-rotation rib, anti-rotation rib is sleeved on anchoring bolt, recess is opened with circumference on anti-rotation rib.The application has the effect of improving the anchoring force of screw.