119 results about "Contraction joint" patented technology

The invention discloses an open cut tunnel crack control structure and method based on the concrete performance gradient, and belongs to the technical field of concrete construction. The open cut tunnel crack control method based on the concrete performance gradient comprises the steps that S1, the expansive concrete mix proportion is obtained; s2, the maximum expansion joint distance allowed by the wall is obtained; s3, expansive concrete is poured, and after the expansive concrete is poured, common concrete is poured at the two ends of the expansive concrete immediately; and S4, curing the expansive concrete and the common concrete until a stable expansive concrete wall and a stable common concrete wall are formed. Through the combination mode of the expansive concrete wall and the common concrete wall, expansive concrete is only arranged in the area with the large shrinkage stress influence, the temperature stress of the overall structure is reduced, the tensile stress is always lower than the tensile strength of concrete, and the overall stability and durability of the structure are improved; therefore, cracks in the open-cut tunnel are reduced, and materials, construction and time cost are saved.

The invention belongs to the technical field of building terraces, and particularly relates to a paint terrace shrinkage joint repairing device and a repairing method thereof.The repairing method includes the steps that intelligent recognition of crack features is achieved through a multi-modal sensing network, feature fusion is conducted on multi-source data through a convolutional neural network algorithm, structural cracks and surface cracks are automatically distinguished, and a repairing result is obtained. Obtaining a detection map; based on the detection map, comprehensively considering crack parameters, environmental conditions and construction period requirements, and automatically generating an optimal repairing scheme; the self-adaptive mixing system is driven to complete dynamic modulation of the repairing material; high-precision filling operation is executed through the intelligent mechanical arm; a full-periodicity performance evaluation model is constructed through an Internet of Things monitoring terminal, a repairing result is monitored, an intelligent mechanical arm is adopted, a path is re-planned in real time through an RRT algorithm, and Z-shaped layered filling is executed, so that the filling fullness is improved.

The invention relates to the technical field of pavement material mechanical property testing, and discloses a pavement material deformation adaptability fatigue testing machine, which comprises a servo drive and control system, a mechanical transmission system and a structure support and reference system, the servo drive and control system comprises a servo motor, a PLC, a servo driver and an analog quantity output module, the PLC is electrically connected with the analog quantity output module, the analog quantity output module is electrically connected with the servo driver, and the servo driver is electrically connected with the servo motor. The load coverage range is wide, the test requirements of pavement material test pieces with different strengths are met, the requirements of various mechanical property tests on loads are met, the loading modes are flexible and diversified, single loading such as horizontal stretching, stretching containing vertical deformation and fatigue stretching circulation can be achieved, and the test efficiency is improved. The device can be combined with MMLS3 small acceleration loading equipment to realize composite loading of tire cyclic load and test piece deformation, and composite working conditions of the seamless expansion joint in actual service are accurately simulated.

The utility model relates to a screeding device for bridge expansion joint anchoring area concrete, which comprises a shell with an open bottom, and a screeding mechanism and a flattening mechanism are arranged in the shell. The trowelling mechanism comprises a sliding assembly, a trowelling plate, a transmission assembly and a millstone assembly, the transmission assembly drives the sliding assembly to drive the trowelling plate to slide back and forth in the longitudinal direction of the shell, and meanwhile the millstone assembly is driven to rotate and trowelling; the flattening mechanism comprises driving assemblies fixed to the two sides of the shell, each driving assembly comprises a first connecting plate fixed to the inner wall of the shell, a transverse supporting rod is fixed to the lower portion of the first connecting plate, a first motor is arranged between the first connecting plate and the transverse supporting rod, and first rolling shafts are rotationally connected to the two ends of the lower portion of the transverse supporting rod. The output end of the first motor is rotationally connected with one end of the first rolling shaft. Through multi-stage trowelling of the first rolling shaft, the second rolling shaft, the trowelling plate and the grinding disc, the trowelling device has the advantages that mechanical loss is reduced, the trowelling efficiency is high, and the quality is good.

The application provides a telescopic joint device for energy-saving glass of curtain wall, and relates to the technical field of building, which comprises an outer frame structure, a horizontal clamping groove seat, a buffer device one, a corner telescopic joint mechanism, a vertical clamping groove seat and a buffer device two. The application has the characteristics of reasonable and simple structure, low production cost, convenient installation and complete functions. The outer frame structure is stably connected through a specific connecting structure, can provide stable support for the whole device, and guarantees the reliability of the device base frame. The elastic effect of the buffer device can effectively buffer the force generated when the curtain wall expands and contracts, and the limiting structure can guarantee the stability of the buffering process, improving the buffering effect and service life of the device. The telescopic joint mechanism arranged at the corner position can adapt to the complex expansion and deformation at the corner through the synergistic effect of the buffer connecting mechanism and the connecting device, avoid stress concentration, and ensure the safety of the corner position.

This invention discloses a waterproof structure and its construction method for building engineering, relating to the field of waterproofing technology for expansion joints in building engineering. The invention includes an elastic shell, with a transmission structure symmetrically and uniformly arranged around its center point within the inner cavity of the elastic shell. A connecting structure is slidably connected to the outer surface of the transmission structure, and splicing structures are symmetrically arranged on both sides of the connecting structure. A sliding snap-fit ​​structure is fixedly connected to the lower part of the outer surface of the elastic shell. A sealing shell is snap-fitted to one side of the elastic shell via the splicing structure. Through the snap-fit ​​structure and sliding ball bearing assembly, the sliding friction between the sliding frame and the snap-fit ​​block is converted into rolling friction, significantly reducing the splicing sliding resistance, decreasing the difficulty and intensity of manual assembly, and making the sliding assembly of the elastic shell and its inner cavity components smoother and more precise. This effectively improves the splicing efficiency of the waterproof structure. Through the snap-fit ​​cooperation between the connecting pin and the positioning groove of the transmission frame, rapid and precise docking of each section of the waterproof structure is achieved, ensuring the integrity and regularity of the overall structure.

The utility model discloses a profiled steel plate and concrete outer wall high low span position expansion joint anti -permeation node, including profiled steel plate outer wall, it sets at the topmost, fixed steel sheet, fixed steel sheet and profiled steel plate outer wall fixed connection, and fixed steel sheet includes first upper U shape part, first lower U shape part and first vertical part, and the lower side of fixed steel sheet is connected with the adjusting steel sheet, and the reinforcing steel plate is rectangular, and the connecting steel plate is arranged between the reinforcing steel plate and the adjusting steel plate, and the lower side of reinforcing steel plate is fixedly connected with the concrete parapet. The utility model discloses through the first lower U shape part of fixed steel sheet and the second upper U shape part of adjusting steel sheet and connects the joint, forms the non - rigid connection structure, effectively absorbs building settlement and temperature deformation stress, solves the joint cracking leakage problem caused by traditional rigid fixed.

The utility model relates to a slab culvert combining foundation pit supporting and bridge functions, and belongs to the technical field of hydraulic engineering, the slab culvert comprises retaining walls, a bottom protection bottom layer and a top cross beam, the retaining walls are symmetrically arranged on the two sides of the top cross beam, each retaining wall comprises a plurality of cast-in-place piles arranged side by side, platform caps are arranged at the tops of the cast-in-place piles, and the bottom protection bottom layer is arranged on the top cross beam. Side walls are fixed to the side portions of the cast-in-place piles, the caps are provided with notches, the two sides of the top cross beam are correspondingly arranged in the notches of the caps on the two sides respectively, the surfaces of the notches are coated with waterproof layers, elastic expansion joints are arranged at the ends of the cross beam and the side walls of the notches, and each elastic expansion joint comprises a bottom foam plastic layer and a top polyurethane adhesive layer. During construction, slope excavation is not needed, construction of the row-connected cast-in-place piles on the two sides only needs to be conducted, the cast-in-place piles serve as supporting piles in the construction period and directly serve as side wall structures of the slab culvert in the later period of a project, the construction cost is greatly reduced, and construction of a complex construction site can be met.

The invention provides a cold-resistant pouring type expansion joint structure and a construction method thereof.The structure comprises a bonding layer, a PUC elastomer layer and a wear-resistant surface layer which are sequentially arranged from bottom to top, and glass fiber gridding cloth is further arranged in the PUC elastomer layer; anchoring areas are arranged on the sections of the two sides of the structure, anchoring ribs are embedded in the anchoring areas, and a water guide groove is formed in the bottom of each anchoring area and communicated with a bridge drainage system through an inclined guide pipe. And a deformation joint is arranged between the PUC elastomer layer and the bridge deck pavement layer. The method is suitable for cold regions, reliable in performance and simple and convenient to construct.

This invention provides a system and construction method for treating arching defects in the pavement of operating tunnels located in underlying karst strata. The tunnel lining is pre-reinforced by installing an arc-shaped I-beam internal support frame. The height and tension of the I-beam internal support frame are adjusted using longitudinal steel beams. After pre-reinforcement, the concrete pavement layer and the underlying broken rock layer are excavated, and the middle section of the tunnel invert is poured. The surrounding rock pressure is transferred to the middle invert via the supporting steel frame. The surrounding rock at the arch foot is then excavated, and concrete is poured to form a closed structure, transferring the tunnel's surrounding rock pressure to the invert. After the closed invert is constructed, the concrete lining is reinforced using a combination of "W-shaped steel strip + anchor grouting + sprayed steel fiber concrete" to solve problems such as cracking, heave, deformation, and voiding in the operating tunnel. Grooves are cut at the transverse expansion joints where water seepage occurs, and channel steel is pre-embedded in the grooves as a water guiding channel to promptly drain seepage water from the pavement into the drainage ditches on both sides.

The utility model discloses a kind of seamless expansion joint drainage structures, solve the problem of water seepage falling and setting instability in prior art seamless expansion joint structure, expansion joint sets up drainage conduit and accesses bridge drainage main pipe to form expansion joint drainage structure system, with beneficial effect, specific scheme is as follows:a kind of seamless expansion joint drainage structure, including the end side concrete piece located at the length direction end side of each bridge beam body, end side concrete piece is bonded with bridge beam body, nut seat is set in end side concrete piece, nut seat is set along the width direction of bridge beam body, end side concrete piece on the both sides of expansion joint supports waterstop, waterstop is communicated with bridge drainage main pipe by water guide pipe, elastic expansion component straddles expansion joint and its both sides are respectively placed on the upper surface of corresponding side end side concrete piece, elastic expansion component respectively press sets the both sides of waterstop at corresponding side end side concrete piece, first fastener detachably connects elastic expansion component and nut seat, elastic sealing layer is laid between elastic expansion component and bridge deck pavement layer.

The invention discloses a wear-resistant composite terrace construction method, and particularly relates to the technical field of terrace construction, and the construction method comprises the following steps: step 1, pretreatment of a base layer; 2, interface agent treatment; thirdly, layered pouring and vibrating are conducted; step 4, spreading and curing a wear-resistant material; step 5, maintenance treatment; step 6, quality detection; and seventhly, expansion joint cutting and joint filling treatment are conducted. According to the invention, a layered pouring and vibrating method is adopted, and concrete mixture is paved and vibrated for multiple times, so that the thickness uniformity of the terrace is ensured, internal bubbles and cavities are effectively eliminated, the compactness and crack resistance of the terrace are improved, and the quality problem caused by internal defects of concrete is reduced; the curing agent is sprayed and the wear-resistant material is spread during initial setting of the concrete mixture, and the wear-resistant material and the concrete mixture are fully combined through multiple times of grinding, rubbing and grouting, so that the wear resistance and hardness of the terrace can be improved.

The utility model relates to the technical field of bridge expansion joints, and discloses a vibration reduction type bridge expansion joint device which comprises a concrete bridge deck slab, asphalt pavement layers and a filling layer, the asphalt pavement layers and the filling layer are arranged on the concrete bridge deck slab, and the filling layer is arranged between the asphalt pavement layers. A filling layer is arranged on the concrete bridge deck slab, high-strength resin concrete is arranged in the filling layer, an expansion joint gap is formed in the butt joint position of the concrete bridge deck slab, a joint crossing plate is arranged on the expansion joint gap, an extruded sheet is arranged on the joint crossing plate, and the extruded sheet divides the high-strength resin concrete into two sections. The device has the advantages of simple structure, high construction efficiency and long-acting durability.

The invention discloses a mounting structure and a mounting method of a concrete-free low-noise telescopic device, and belongs to the field of bridge expansion joints, the mounting structure comprises a telescopic groove, an L-shaped embedded steel plate is mounted in the telescopic groove, the mounting structure further comprises a pre-assembly part, the pre-assembly part comprises a leveling plate and two symmetrically-arranged telescopic parts, and the leveling plate is connected with the two telescopic parts. The two telescopic pieces are both detachably connected with the leveling plate, the space between the two telescopic pieces is further filled with noise reduction filler, by improving the mounting structure and the mounting method, the relative position of the two comb plates is more accurate, noise is reduced, and the problems that in the prior art, deviation is likely to be generated between the relative position of the bridge expansion joint comb plates and a design value, and noise is reduced are solved. And noise is easy to generate.

The present application relates to a kind of in-service large-span continuous box girder spanning type wide connection structure and its construction method.The structure includes: connecting main piece, including several groove pieces, top plate and several solid blocks;And connecting secondary piece, including several wedge-shaped solid blocks, and box type piece matched with another end of several wedge-shaped solid blocks;When existing old bridge and wide new bridge occur displacement or produce deflection difference, the connecting main piece occurs vertical rotation along the center axis of spherical hinge, wedge-shaped solid block and connecting main piece occur relative displacement, so that connecting main piece and connecting secondary piece occur limited displacement.The construction method includes the following steps: installing new bridge pavement, old bridge pavement;Install support;Assemble connecting main piece, connecting secondary piece and respectively install in wide new bridge and existing old bridge.Compared with prior art, the present application eliminates the problem of traditional expansion joint that may exist at the joint position, improves the comfort of vehicle driving.

The utility model relates to a device for controlling the thickness of virtual laying of cement soil, which belongs to the technical field of road laying and comprises a base, a vertical rod, a graduated scale, an indicating rod and a clamping mechanism. The vertical rod is vertically fixed on the base, a mounting groove is formed in the vertical rod in the vertical direction, and a graduated scale is arranged in the mounting groove; the indicating rod is provided with a limiting hole matched with the vertical rod, the indicating rod is provided with a contraction joint which enables the limiting hole to be communicated with the outside, and the side wall of the contraction joint is provided with a locking hole. The clamping mechanism comprises a locking rod, a cam and a deflector rod, the locking rod is slidably sleeved with the locking hole, one end of the locking rod is fixedly connected with a first limiting block, the other end of the locking rod is hinged to the cam, and the deflector rod is fixedly connected to the cam. The utility model effectively solves the problems that the existing device for controlling the false laying thickness of the cement soil rubs the scales on the scale rod when the indicating rod is adjusted in a sliding manner, so that the scales are lost and become fuzzy, the position adjustment of the indicating rod generates an error, and the construction quality is influenced.

The present application relates to a kind of highway reconstruction and expansion half-width alternate traffic quick replacement bridge expansion joint construction method, comprising the following steps: cutting joint on the both sides of original expansion joint structure is constructed;Original expansion joint structure is removed;Installation pouring formwork system;Setting up temporary installation stable hanger, hoist new expansion joint structure;Pouring steel fiber concrete at the end of main beam.The beneficial effects of the present application are: the strip-shaped protective box wraps the cutting operation surface therein, and delivers cooling water through the water inlet hole, and the water outlet hole extracts the sewage containing dust, so as to avoid dust pollution generated by cutting operation, and the structure is simple and reliable, can be completed by modifying existing cutting mechanical equipment, and the construction cost is lower;New expansion joint structure can be assembled in place first, and then hoisted to the installation position by temporary stable hanger, which can effectively improve the on-site operation efficiency compared with step-by-step installation, and ensure the installation positioning accuracy.

The utility model relates to the technical field of building construction, and discloses an expansion joint of an imitated brick facing, which comprises a concrete beam, a plurality of expansion joints and a plurality of expansion joints, a contraction joint; a brick layer; the buckle plate covers the relative upper part of the contraction joint; the edge of the buckle plate is in contact with the brick layer; the buckle plate is provided with a bayonet; the brick masonry is fixed at the bayonet, and the height of the brick masonry is consistent with that of the brick layer; the first waterproof layer covers an opening in one side of the contraction joint; the second waterproof layer blocks an opening in the other side of the contraction joint; according to the expansion joint of the imitated brick facing, the buckle plate is used for arranging the brick masonry located above the expansion joint relatively, the brick masonry is similar to a floor brick layer in structure and form, the brick masonry is parallel to the brick layer and is approximately continuous, and the purpose that the expansion joint of the imitated brick facing and the brick floor are integrated is achieved. And the waterproof performance is improved through the double-layer waterproof structure, double insurance is provided for the expansion joint, and it is guaranteed that the expansion joint always has the good waterproof performance.

The application relates to the technical field of traffic pavements, in particular to a bridge deck buffer expansion joint device and a construction method, which comprises a sliding layer arranged at the bottom between two bridge decks, an elastic glue arranged above the sliding layer, concrete blocks and a middle beam arranged above the elastic glue in sequence, embedded steel bars and anchoring steel bars arranged on the left and right sides of the concrete blocks respectively, side beams arranged on the left and right of the middle beam, a sealing water stop belt arranged between the side beams and the middle beam, one end of the sealing water stop belt connected with the side beam, the other end of the sealing water stop belt connected with the middle beam, and the anchoring steel bars welded and fixed with the side beams. The damping device, the elastic glue material and the damping pad and other components are used in the expansion joint, the structural vibration amplitude is effectively reduced, the stability of the bridge is improved, the structural vibration caused by the wind load and the vehicles is reduced, and the safety of the bridge is improved.

The application discloses a kind of bridge expansion joint position bumping phenomenon's quick handling construction method. Including step 1) measuring elevation: the elevation of the steel of bridge expansion joint two sides and the elevation of two sides asphalt surface are measured respectively, and the repair height of anchoring area is calculated;Step 2) base cleaning: the surface of the anchoring area (2) to be repaired is polished and cleaned;Step 3) formwork is set on the two sides of expansion joint, and movable angle steel is installed according to the repair height obtained in step 1);Step 4) deploy fast hard mortar;Step 5) the mortar is smoothed on the surface of the anchoring area (2) to be repaired, and is cured;Step 6) remove formwork;Step 7) restore traffic.The application not only can improve the bumping phenomenon on the two sides of expansion joint, improve driving safety and comfort, but also can repair the local damaged concrete of expansion joint anchoring area, prolong the service life of expansion joint.

A maintenance and replacement method for a bridge expansion device comprises the following steps that S1, the expansion device in a maintenance area is dismantled; s2, an expansion joint groove area is dug, and a bracket and a water stop belt are dismantled; s3, an expansion joint groove area is trimmed and cleaned; s4, a lower connecting structure of the telescopic device is welded; s5, installing a water-tight belt; s6, a formwork is installed; s7, a concrete end formwork and an elastic sealing material end formwork are installed; s8, concrete and an elastic sealing material are poured; s9, mounting a telescopic device; s10, maintenance is carried out; s11, replacement preparation work of the telescopic devices in the adjacent to-be-maintained areas is carried out; s12, performing joint treatment on the maintenance transition area; and S13, the telescopic devices of the adjacent to-be-maintained areas are replaced. According to the maintenance and replacement method for the bridge expansion device, the replaced expansion device is of a full-water-sealing structure and can adapt to expansion deformation of a beam body, the water sealing performance is guaranteed, the mode of concentrated drainage of the expansion device is converted into the mode of bridge floor drainage, single-lane replacement can be achieved, and the problem of full-width road sealing caused by whole-lane replacement is solved.

The invention discloses an assembly type profile steel telescopic device and an installation method thereof.The telescopic device comprises a prefabricated part assembly, a steel plate assembly and a detachable reinforcing assembly, the steel plate assembly is detachably embedded in the prefabricated part assembly, and the detachable reinforcing assembly detachably connects the prefabricated part assembly and the steel plate assembly into a contraction joint notch; the prefabricated part assembly is provided with a first notch and a second notch, the steel plate assembly comprises first deformed steel and second deformed steel, the first deformed steel is arranged in the first notch, the second deformed steel is arranged in the second notch, and a water stop belt formed in a cast-in-place mode is arranged between the first deformed steel and the second deformed steel. The prefabricated part assembly and the steel plate assembly are of an assembly type structure and are detachably connected with the bridge body through the detachable reinforcing assembly, and therefore the replacement efficiency of the expansion joint structure is high. The two sides of the water stop belt formed through cast-in-place are embedded in the first deformed steel and the second deformed steel correspondingly, and the stability and durability of the expansion joint structure are guaranteed.

The present invention relates to an inverted integral installation reverse copper sheet water-stop fixing device and construction method, belonging to the technical field of water conservancy engineering, including an asphalt box, tar paper, a copper sheet water-stop, a hot-dip galvanized steel plate and a reinforcement. The present invention adopts the process of overall prefabrication and overall installation, which completely solves the problems of inaccurate installation positioning of the copper sheet water-stop and leakage caused by the loose one-time pouring of the asphalt well, and ensures the vertical water-stop effect of the expansion joint of the water-passing structure; the horizontal pouring inverted reverse construction method is adopted to overcome the limitation of first installing the copper sheet water-stop and then pouring the asphalt well. The on-site construction is more flexible, and the asphalt box assembled by a simple template is simple to manufacture. Moreover, the asphalt well can be quickly cycled and mass-produced according to the needs of the project, which can save materials and labor costs, and has significant economic benefits.

The application discloses a bare concrete prefabricated bridge expansion joint device, which comprises a left structure and a right structure, wherein the left structure and the right structure are the same in structure and are mirror image arranged, box top plates and box bottom plates are oppositely arranged on the left structure, a box rear plate connected with the box bottom plate is arranged on one side of the box top plate away from the right structure, a side beam steel connected with the box top plate is arranged on the upper portion of the other side, a box front plate connected with the box bottom plate is arranged on the lower portion, and a reinforcing rib and a special-shaped rib are arranged in the left structure. The reinforcing rib and the special-shaped rib can ensure the strength of the bridge expansion joint, the structure is simple, firm and durable, the thermal expansion and cold contraction deformation of the highway bridge caused by the change of the environmental temperature can be solved, and the application is widely used in various highway bridges.

This invention discloses a seamless expansion joint compound suitable for medium expansion and contraction and its preparation method, comprising 22-28 parts polyurethane and 100 parts aggregate and rubber particles. By adjusting the proportion of rubber particles, it can accommodate seamless expansion joints with medium expansion and contraction of 50mm-80mm and tensile deformation rate of 5%-8%. In this invention, polyurethane provides excellent elastic recovery and adhesion, rubber particles contribute high toughness and damping properties, and aggregates of specific particle sizes provide skeletal support and compressive strength. The three components work synergistically, enabling the compound to flexibly absorb stress and prevent cracking under medium expansion and contraction, while rigidly resisting traffic loads and preventing rutting and permanent deformation. By adjusting the proportions of the three components, the elastic modulus of the seamless expansion joint compound can be precisely controlled, placing it between that of highly elastic pure polyurethane and rigid cement-based materials, thereby achieving better modulus matching with adjacent pavement structures, reducing stress concentration at joints, and extending service life.

The utility model discloses a pavement structure of a non-expansion joint low-noise bridge floor, which sequentially comprises a stable layer, a waterproof crack-inhibiting layer, a sliding layer, a middle surface layer and an upper surface layer from bottom to top, each layer is a continuous pavement layer, and the surface is non-expansion joint; a gap is formed between the beam body and the bridge abutment, and an anti-leakage net is arranged at the one-third depth position of the gap; a first arc is arranged between the gap and the abutment, the circle center corresponding to the first arc and the leakage-proof net are located on the same horizontal line, the central angle corresponding to the first arc is 90 degrees, and the radius of the corresponding circle is one third of the depth of the gap; a second arc is arranged between the gap and the beam body, the circle center corresponding to the second arc and the leakage-proof net are located on the same horizontal line, and the circle radius corresponding to the second arc is two thirds of the depth of the gap. According to the bridge deck pavement structure, the asphalt mixture is paved in a continuous through paving mode, no expansion joint exists in the whole structure and all layers of structures, the bridge deck pavement can reduce traffic noise, and the problem that the bridge deck pavement is high in noise is solved.

The utility model discloses a wear-resistant floor modular expansion joint which comprises floors, a buffer assembly is arranged between the floors, the buffer assembly prevents floor materials from being cracked, cracked and warped due to change of internal stress in winter and summer, the buffer assembly is placed between the two modular floors, and the two modular floors are connected through the buffer assembly. Then, the buffer assembly is forcibly embedded into a gap between the two terraces from top to bottom, the insertion block can deform under pressure and be arranged at the bottoms of the two terraces, meanwhile, the buffer cylinder in the middle of the buffer assembly can make contact with the position between the two terraces, and the self-locking effect can be achieved through cooperation of the deformable buffer cylinder and the insertion block; the floor buffer device is simple in structure and convenient to use, the floor buffer device can be quickly mounted between two floors, the interior of the buffer cylinder is circular, and a second pressure relief groove is formed, so that the buffer cylinder can buffer the floors through deformation, and ground cracks and deformation caused by expansion caused by heat and contraction caused by cold of the floors are prevented.

The invention discloses a stone arch bridge main arch ring rib type cover arch reinforcing method, relates to the related field of stone arch bridge reinforcing and reconstruction, and aims at improving the bearing capacity of a bridge and enhancing the safety and durability of the bridge through a comprehensive reinforcing system combining main arch ring arch foot local increased section reinforcing, web arch cover arch reinforcing, carbon fiber grid reinforcing and bridge floor system reconstruction. The durability of the structure is improved. The reinforcing method comprises the following steps that S1, section increasing reinforcing treatment is conducted on the arch feet of the main arch ring locally; s2, a web arch close to the pier is reinforced by adopting a cover arch method; s3, other web arch rings are reinforced by adopting a carbon fiber grid hanging treatment method; s4, reinforcing the web arch ring of the bridge abutment by adopting a carbon fiber grid hanging treatment method; s5, the bridge deck pavement above the plane where the bottom face of the original guardrail outrigger is located is chiseled away; and S6, bridge deck pavement and rebuilding, bridge deck guardrail replacement and expansion joint addition.

A concrete expansion joint insert includes a body having a length between a first end and a second end, a thickness between a first side and a second side, and a height between a first edge and a second edge. The body includes a first portion having the thickness, the length, and a first amount of the height. The body includes a second portion having the thickness, the length and a second amount of the height. The first portion of the body is predisposed to be separable from the second portion of the body. A separation support member is situated within the first portion along a substantial portion of the length.

The invention relates to a method for repairing a cement road, which comprises the following steps of: 1, washing mud on the surface of the cement road to be repaired by using high-pressure water, and strictly prohibiting washing with water and preventing the mud from permeating into a foundation at the position where expansion joints and pouring seams are lost; 2, wiping oil stains on the surface of the cement road by using a steel wire brush to remove the oil stains on the surface; 3, the cleaned mud is washed away through high-pressure water; 4, scabbling the surface of the cement road after the road surface is dried; 5, chiseled disintegrating slag is removed, and a roller is used for brushing an adhesion agent; 6, after the interface agent is air-dried for 1-3 hours, pouring epoxy resin and curing agent quick repair mortar with the ratio of 2: 1; 7, after self-leveling, hydraulic engineering flattening is carried out on local uneven places; and 8, maintaining for 3 days to enable the road to pass. The problem of slab staggering of cement road plates can be solved in time, project investment is reduced, the construction period is shortened, and the disadvantage of passage obstacles of an original road is greatly reduced.