1733 results about "Mesh reinforcement" patented technology

The invention provides a reinforcing mesh multi-welding-spot quality detection method and system based on infrared thermal imaging. Wherein for each crossed steel bar welding spot, the fusion form of the crossed steel bar welding spot is identified based on the thermal radiation image; based on the fusion forms of all the crossed steel bar welding spots, quality detection results of the multiple welding spots of the steel bar mesh are generated, and the quality detection results comprise geometric judgment results used for representing whether the fusion forms meet preset form requirements or not; and according to the quality detection result, a corresponding early warning mode is adopted for self-adaptive early warning, and welding parameters adopted by the next electric resistance welding process are adjusted according to early warning information. According to the technical scheme provided by the invention, millisecond-level multi-welding-spot synchronous quality detection and process closed-loop optimization are realized, and the production yield and the process adaptability of the large reinforcing mesh are greatly improved.

Disclosed in the present invention are a prefabricated composite floor slab and steel bar truss floor deck directly utilizing old slabs, and a method. The prefabricated composite floor slab comprises new concrete, old concrete slabs, a slab bottom reinforcing mesh, a slab surface reinforcing mesh, steel bar trusses, steel dowel bars, and post-cast concrete. The steel bar truss floor deck comprises new concrete, old concrete slabs, a steel base plate, a slab surface reinforcing mesh, steel bar trusses, steel dowel bars, and support steel bars. According to the present invention, the old concrete slabs are directly utilized instead of being crushed into recycled blocks or recycled aggregates for reuse, thereby greatly simplifying processing procedures, significantly increasing the recycling rate of old concrete, and significantly reducing the usage amounts of new concrete and corresponding cement, thus achieving a significant carbon emission reduction effect; through holes are vertically drilled in the old concrete slabs, the steel dowel bars are inserted into the through holes, gaps between the steel dowel bars and the through holes are then filled with a high-strength grouting material, and shear resistance members are arranged on the side edges of the old concrete slats to enhance the shear resistance at the interface between the new concrete and the old concrete.

The invention discloses a ganged brick wall construction method. The ganged brick wall construction method comprises the following steps that firstly, construction preparation is conducted; 2, anti-overturning design and brick arrangement deepening of outer wall bricks are carried out; step 3, treating a base layer; step 4, surveying and setting out; 5, bricks are arranged at the bottom; sixthly, vertical penetrating reinforcing steel bars are constructed; seventhly, ganged bricks are built, specifically, corners are coiled firstly, then a story pole is erected, and then double-face hanging line building is conducted; eighthly, horizontal and transverse tie bars are constructed; 9, vertical through hole grouting is conducted, specifically, every eight layers of bricks are built, grouting materials are adopted to conduct grouting on the through holes penetrating through the reinforcing steel bars; tenthly, pointing and cleaning protection are conducted; and step 11, brushing an organic silicon coating. According to the method, the vertical reinforcing steel bars, the transverse reinforcing steel bar meshes, the main body structure tie steel bars and the like are fixed to the main body structure, a stable keel stress and anti-seismic system is formed, the ganged brick wall body and the main body structure are effectively tied, and the stability of the wall body is guaranteed.

The invention discloses a prefabricated box girder reinforcement cage forming method suitable for factory manufacturing, which is characterized in that a box girder reinforcement cage obtained by assembling an existing closed hoop is improved into a structure of a bottom web double-U mesh and a top plate double-layer mesh according to a'double-U + top plate 'forming and assembling thought; each type of reinforcing mesh can be automatically produced by bending, binding and welding equipment at the same time, the mesh is moved to a reinforcing steel bar framework assembling area through a special lifting appliance to form a box girder reinforcing steel bar framework, and meanwhile prestressed pipeline strand penetrating installation is carried out. The construction quality problems of strand pulling displacement, deformation damage and the like of the prestressed pipeline are solved, the subsequent prestressed tension safety quality is guaranteed, and the service life of the prefabricated PC box girder is prolonged.

The automatic production equipment for the U-shaped reinforcing mesh in the box girder comprises a straightening structure, a bending structure and a welding assembly, the straightening structure is arranged on the upstream portion of the bending structure, and the welding assembly is arranged on the downstream portion of the bending structure; the reinforcing steel bars sequentially pass through the straightening structures, the bending structures and the welding assemblies to form an inner U-shaped reinforcing steel bar net. Steel bars are automatically produced to form inner U-shaped steel bars, then the inner U-shaped steel bars are in lap joint with longitudinal steel bars conveyed in the limiting holes, a plurality of lap joint welding spots are welded and fixed through the first welding gun and the second welding gun, the inner U-shaped steel bar mesh with the stable structure is formed, automatic control is achieved in the whole process, and the production efficiency is high; meanwhile, manual intervention is avoided, and the formed inner U-shaped reinforcing mesh is good in consistency, high in strength and suitable for continuous large-scale production.

The invention discloses a pipe gallery concrete lining vibration quality monitoring method and system, and relates to the technical field of pipe gallery concrete lining construction monitoring, and the method comprises the steps: arranging a three-way vibration sensor network at a lining reinforcing mesh key node according to a pipe gallery structure cross-section diagram; acquiring original data of the three-way vibration sensor in real time, and preprocessing the original data to generate standardized vibration characteristic data; based on power spectrum density analysis, establishing a correlation model of the vibration characteristic data and vibration energy so as to calculate the vibration energy value of each area in the vibration process; according to a concrete mix proportion and a vibrator frequency parameter, establishing an association relationship among vibration energy, compactness and a bubble rate so as to calculate the compactness and the bubble rate; and comparing the calculated values of the compactness and the bubble rate with respective set reference values, triggering a dynamic regulation and control mechanism according to a comparison result, and generating a vibration quality report. And the efficiency and reliability of pipe gallery concrete construction are effectively improved.

The invention provides a construction method of a CRTS III type slab ballastless track, and relates to the technical field of high-speed rail construction, and the construction method comprises the following steps: mounting base plate steel bars, side forms, end templates and limiting groove templates, placing foam plates at expansion joints, and reserving track slab pressing and anchoring holes; base plate concrete is poured, and base plate concrete formwork removal, surface finishing, maintenance and expansion joint construction are carried out after pouring; constructing a geotextile isolation layer and an elastic cushion layer; limiting groove steel bars and self-compacting concrete layer steel bar meshes are installed, and track plates are placed; before and after the track plate and the base plate are fastened by the pressing device, the track plate is finely adjusted by the fine adjustment device; and a self-compacting concrete formwork is installed, self-compacting concrete is poured, and post-pouring treatment and curing are conducted. The track plate and the base plate are fastened through the pressing device, so that the track plate, the base plate and the self-compacting concrete layer are tightly attached in the self-compacting concrete pouring period, and the situation that reworking or track laying is difficult due to the fact that the floating amount of the track plate is too large is avoided.

The invention belongs to the technical field of tunnel supporting, and discloses a supporting structure of a long-distance deeply-buried TBM inclined shaft water-rich complex rock stratum and a working method.The supporting structure comprises graded yielding control anchor rods, anchor cables, a steel bar row, a steel bar net and a sprayed concrete layer, and the steel bar row, the steel bar net and the sprayed concrete layer are sequentially arranged on the tunnel surrounding rock surface from outside to inside; the graded yielding control anchor rod comprises a rod body, an outer ring, a yielding sleeve and an inner ring. In an initial state, the rear end of the rod body presses the inner ring on the rear port of the inner cavity of the yielding sleeve through a nut; the front end of the yielding sleeve extends into the drill hole and tightly presses the outer ring on the surrounding rock on the outer side of the drill hole; primary yielding friction fit is formed between the inner ring and an inner cavity of the yielding sleeve; and the front end of the yielding sleeve is in secondary yielding friction fit with the outer ring. The method has the advantages that the bearing capacity of the surrounding rock is fully exerted, and passive support is converted into active support; the graded yielding control anchor rods and the anchor cables are jointly supported, and the supporting structure is good in integrity and high in strength.

The utility model provides a split mounting type ALC partition wall board which comprises a bearing board, the bearing board comprises a three-dimensional steel bar net rack and a concrete layer covering the three-dimensional steel bar net rack, a plurality of first strip-shaped grooves and first strip-shaped protrusions which are arranged in parallel at intervals are arranged on the two sides of the bearing board, and a plurality of second threaded sleeves are arranged on the two sides of the bearing board; the bearing plate is used as a main body structure, the three-dimensional steel frame net rack is embedded into the bearing plate, and the bearing plate can bear the load; during manufacturing, the threaded sleeve structure is embedded, and the threaded sleeve structure is connected with a steel bar net rack and can be used for being fixedly connected with an adjacent structure.

The utility model relates to an assembly type enclosure pier, which belongs to the technical field of power transmission line engineering and comprises a splicing pier body sleeved on an electric pole, the splicing pier body comprises two half pier bodies which are detachably spliced with each other, and reinforcing meshes are arranged in the half pier bodies; mounting grooves are formed in the two ends of each half pier body, the mounting grooves of the two half pier bodies are mutually spliced to form a clamping groove, a steel plate is clamped in the clamping groove, and the steel plate is detachably connected with the two half pier bodies through a plurality of connecting pieces. Only simple assembly is needed on site, the construction efficiency can be greatly improved, the environmental pollution can be reduced, and the construction quality can be well controlled.

The invention belongs to the technical field of concrete prefabricated parts, and relates to an autoclaved aerated concrete composite thermal insulation wallboard and a manufacturing process thereof. The autoclaved aerated concrete composite thermal insulation wallboard is of a three-layer composite structure and comprises autoclaved aerated concrete layers on the two sides and a phenolic aldehyde board arranged between the autoclaved aerated concrete layers on the two sides. The manufacturing process comprises the following steps: carrying out high-temperature steam curing on the phenolic aldehyde plate in advance through a still kettle, then obliquely inserting and fixing the phenolic aldehyde plate by using a reinforcing mesh (the area of the reinforcing mesh is larger than that of the phenolic aldehyde plate), sinking into a mold filled with slurry for pre-curing, cutting after the composite thermal insulation wallboard is preliminarily formed, punching two sides of the wallboard, and then putting into the still kettle for autoclaved curing, thereby obtaining the composite thermal insulation wallboard. According to the manufacturing process, the phenolic aldehyde board is effectively prevented from being separated from the autoclaved aerated concrete layer, cracks are effectively prevented from occurring at the edge intersection position of the autoclaved aerated concrete and the phenolic aldehyde board, the percent of pass of the wallboard is increased, the service life of the wallboard is prolonged, and the autoclaved aerated concrete composite wallboard has wide market prospects.

The application discloses a cast-in-situ concrete slope protection plate construction process, which comprises the following steps: measuring and lofting, determining the total construction range of the cast-in-situ concrete slope protection plate; extending and excavating a groove downward along the slope surface at the slope foot of the total construction range of the cast-in-situ concrete slope protection plate; leveling and tamping the slope surface in the total construction range of the cast-in-situ concrete slope protection plate; dividing the construction range of each cast-in-situ concrete slope protection plate on the slope surface; supporting the formwork of the cast-in-situ concrete slope protection plate on the slope surface; fixing the pre-bundled steel mesh of the cast-in-situ concrete slope protection plate, pouring concrete, ironing the concrete surface, and removing the formwork; supporting the formwork of the cast-in-situ concrete slope protection plate of the later-poured cast-in-situ concrete slope protection plate beside the previously-poured cast-in-situ concrete slope protection plate; fixing the steel mesh, pouring concrete, ironing the concrete surface, and removing the formwork. The application can avoid the seepage and overflow of concrete slurry along the bottom of the U-shaped structure formed by the formwork of the cast-in-situ concrete slope protection plate, reduces the waste of concrete, and facilitates the ironing of the concrete surface.

The invention discloses a trapezoidal sleeper track integrated construction method, and relates to the technical field of track construction, the method comprises the following steps: assembling a steel rail, a fastener and a trapezoidal sleeper into a track panel to be treated according to the length requirement of the track panel, and binding a track bed reinforcing mesh; a to-be-processed rail row is placed above the elastic vibration reduction parts of the trapezoidal sleepers, the prefabricated base sleepers are placed below the trapezoidal sleepers, the trapezoidal sleepers and the prefabricated base sleepers are fixed through angle steel or bolts to form an assembly structure, and the assembly structure and a ballast bed reinforcing mesh are bound and connected to obtain a to-be-processed device; and after the to-be-machined device is conveyed to the laying position of the construction working face, ballast bed pouring treatment and ballast bed formwork removal treatment are conducted, and construction is completed. The prefabricated foundation sleeper structure is introduced between the ballast bed and the trapezoidal sleeper, the prefabricated foundation sleeper and the ballast bed are bound through the reserved steel bars, the trapezoidal sleeper is directly arranged on the prefabricated foundation sleeper and does not need to participate in the ballast bed pouring process, the construction efficiency can be improved, and it is guaranteed that the damping effect of the trapezoidal sleeper is effectively exerted.

The invention relates to the technical field of building construction, in particular to a building machine wall-attached support accurate pre-embedding construction method which comprises the steps that a theoretical position point set of a wall-attached support embedded part and an actual structure point set of a bound reinforcing mesh are obtained, and space coordinate system alignment is conducted; constructing a spatial distance field of the theoretical position point set and the actual structural point set, obtaining an adjustment strategy of the theoretical position points of the wall-attached support embedded part according to the spatial distance field, and solving a collision-free adjustment path of the adjustment strategy to adjust the theoretical position points having position conflicts with the actual structural point set; and the deviation condition of the theoretical position point in the pouring process is detected, and adjustment is conducted. According to the method, through systematic steps and innovative technologies, precise pre-embedding construction of the wall-attached support is achieved, the construction precision and efficiency are remarkably improved, the safety of the construction process is enhanced, a good foundation is laid for subsequent engineering implementation, and a reference mode is provided for future building construction.

The invention discloses a networking system of aerated plate reinforcing mesh cages, and belongs to the technical field of aerated plate production. Comprising an automatic plastic clip mounting unit, a steel chisel transfer unit and a mesh clamping unit, the automatic plastic clamp mounting unit is used for achieving automatic assembly of plastic clamps and steel chisels, the steel chisel transferring unit is used for transporting the steel chisels, and the mesh clamping unit is used for clamping meshes to the plastic clamps. Full-automatic production of the plastic clamps, the steel chisels and the meshes from transportation to mesh arrangement to a to-be-welded state can be achieved, and the production efficiency of the reinforcing mesh cage is greatly improved.

The invention belongs to the technical field of mining construction, and particularly relates to an artificial roof structure and a construction process thereof. The construction process comprises the steps that S1, anchor rod holes are constructed in the positions, 1 m away from a bottom plate, of two sides of a stope, S2, ore cushion layers with the thickness of 200 mm are laid and leveled, S3, I-shaped steel bottom beams are erected and fixed through round steel anchoring parts and welding base plates, S4, a reinforcing mesh is laid, main ribs and auxiliary ribs are bound in a crossed mode and welded to anchor rods, according to the composite structure design of the double-layer reinforcing mesh, the steel wire mesh and the hanging bar system, a three-dimensional stress system is formed, the bending resistance and the shearing resistance of the false roof are remarkably improved, the problem that a traditional false roof is prone to cracking and sinking is solved, and the false roof has the advantages of being simple in structure, convenient to use, economical and practical. Due to the layered matching design of the full-tailing cemented filling body, the bearing strength is guaranteed, seamless roof contact is achieved, the risk of roof hollowing is reduced, the pressure of stope operation circulation is relieved, the ore removal efficiency is improved, and the mining cost is reduced.

The invention discloses a tunnel full-section excavation support forming construction method with an inverted arch. The method comprises the following steps that construction preparation is conducted; an arch frame is manufactured, the arch frame comprises an arch wall section and an inverted arch section, and the arch wall section and the inverted arch section are spliced and connected; performing drilling construction on the tunnel face to obtain blast holes, installing detonators in the blast holes, and performing blasting to obtain a tunnel section; trimming the contour line of the tunnel section; mounting the arch frame to the tunnel section, connecting a reinforcing mesh to the arch frame, and hanging the reinforcing mesh; wet-spraying concrete to the inverted arch section and the arch wall section to form a closed support ring; and the tunnel section is monitored and measured. According to the construction method, the problems that in the prior art, inverted arch construction often needs to be independently operated after an arch wall is closed, the opening time is long, the construction difficulty is large, a structure of'the arch wall is closed but the inverted arch is not closed 'is formed, circumferential stress is incomplete, and the overall stability is poor are solved.

The present invention relates to a combined prevention and control deep foundation pit pit-in-pit in a high-confined water formation and a construction method. The construction method includes the following steps: construction platform erection, reinforcement construction of the pit-in-pit, formwork construction, and waterproof coiled material laying. The beneficial effects of the present invention are as follows: A simple steel bar binding bench device is developed. The simple steel bar binding bench is composed of bolts, profiled steel, pin parts, etc., and the binding parameters of the cushion steel bar mesh can be accurately controlled by moving the spacing of the pin parts, reducing the difficulty of binding the cushion steel bar mesh; The hanging platform system is composed of a track groove, a construction platform, telescopic hanging rods, etc., realizing the arbitrary movement of the construction platform in the space of the pit-in-pit and reducing the construction difficulty; The mobile system used can also be used for the subsequent coiled material spreading rack; The attitude adjustment of the steel bar mesh during hoisting is realized through mobile clamping and hoisting, reducing the hoisting difficulty.

The invention provides a multi-source dynamic disturbance rockburst combined support prevention and control system and method, and relates to the technical field of rockburst disaster prevention and control, the system comprises stress release holes, wave-absorbing grouting holes, energy-absorbing anchor rods and a passive pressure-bearing structure; the stress release holes are formed in a rockburst high-risk area of the tunnel surrounding rock; the wave-absorbing grouting holes are distributed around the rockburst high-risk area in a staggered mode, the wave-absorbing grouting holes are filled with wave-absorbing grouting materials, and a three-dimensional wave-absorbing grouting area is formed; the energy-absorbing anchor rod is arranged in the three-dimensional wave-absorbing grouting area; the passive pressure-bearing structure comprises a quick-setting concrete layer, a concrete layer containing rubber particles, a steel arch and a steel fiber concrete layer, the concrete layer containing rubber particles is arranged behind the reinforcing mesh, the steel arch is arranged behind the concrete layer containing rubber particles, and steel fiber concrete is arranged behind the steel arch. By constructing the pressure relief-wave absorption-energy absorption-passive pressure bearing four-stage combined supporting system, the safety and adaptability of the supporting system for the rockburst high-risk area are remarkably improved.

The utility model discloses a tunnel safety supporting device which comprises a steel bar net face arranged on the inner wall of a tunnel, a plurality of first anchor rods supporting the steel bar net face, arch frames, second anchor rods forming hoops for the arch frames and clamping plates fixing the adjacent arch frames. The end, used for splicing, of the steel frame is provided with an installation face used for fixed connection, the second anchor rods are installed on the two sides of the steel frame in pairs and anchored on the inner wall of the tunnel in an inclined mode, the second anchor rods are provided with bent parts, and the bent parts are welded to the steel frame. According to the technical scheme, the inclined anchor rods are arranged at multiple positions of the lagging jack to lift and fix the whole, and the clamping plates between the lagging jacks can further improve the rigidity and stability of the lagging jack in the longitudinal direction of the tunnel.

The invention provides a tunnel hidden defect simulation detection system, and relates to the technical field of tunnel detection. The method comprises a lining structure, a hidden defect simulation assembly, a radar assembly and a signal processing assembly. The lining structure comprises reinforcing meshes with different mesh sizes and internal defect simulation components; the reinforcing meshes with different mesh sizes are used for simulating the reinforcing meshes under different conditions, and the internal defect simulation component is used for simulating a lining structure under different internal defects; the hidden defect simulation assembly comprises a frame, a hidden defect simulation component and surrounding rock; the radar assembly is used for transmitting and receiving electromagnetic waves in a preset frequency range. The signal processing assembly is used for processing radar echo signals received by the radar, determining radar signal characteristics under the conditions of internal defects of different lining structures and tunnel hidden defects according to the radar echo signals, and constructing a hidden defect simulation detection database. According to the invention, tunnel simulation detection under different working conditions can be realized.

The present application provides a rebar tying robot capable of automatic track switching. The rebar tying robot comprises: a mounting frame; and a walking mechanism, a track switching mechanism, and a tying mechanism arranged on the mounting frame. The walking mechanism is used for driving the robot to move in an X direction. The track switching mechanism comprises a first support assembly, a second support assembly, and a translation assembly. The first support assembly and the second support assembly can be alternately supported on a rebar mesh, and a contact surface of each of the first and second support assemblies with the rebar mesh is planar. The translation assembly is connected to the first support assembly or the second support assembly, and is used for driving the robot to move in a Y direction. The tying mechanism is used for tying rebars. According to the rebar tying robot capable of automatic track switching in an embodiment of the present application, the first support assembly and the second support assembly are alternately supported on the rebar mesh and, in coordination with the translation assembly, drive the robot to move in the Y direction, thereby enabling the robot to automatically switch tracks.

An underground roadway waterproof supporting construction method comprises the following steps that anchor rods are constructed on the surface of a to-be-supported roadway after drainage, and a first reinforcing mesh and a second reinforcing mesh are installed on the constructed anchor rods; reinforcing ribs are arranged on the first reinforcing mesh at intervals; the second reinforcing mesh comprises a layer of reinforcing mesh sheet and a layer of mining flame-retardant plastic mesh, and the mining flame-retardant plastic mesh is located between the first reinforcing mesh and the reinforcing mesh sheet; a first material is sprayed on the surface of the second reinforcing mesh to construct a supporting layer, grouting holes are reserved in the supporting layer, and the supporting layer is used for providing high-strength waterproof anti-seepage support for the roadway; after the supporting layer is finally set, grouting of a second material is conducted between the supporting layer and the surface of the roadway to be supported through the grouting holes so as to construct a buffer layer, and the buffer layer is used for providing buffer for deformation and movement of the roadway; a gap between every two adjacent supporting layers serves as an expansion joint, and a back-attached type waterproof structure and / or a middle-buried type water bag waterproof structure are / is constructed at the expansion joints.

The application discloses a track with adjustable vertical linear rail beam and a construction method thereof. The track comprises two parallel steel beams, and the top of the steel beam is provided with an adjustable low beam. The adjustable low beam is a vertically adjustable beam. The opposite side walls of the adjustable low beam are guide walls, and the guide walls are in contact with guide wheels of a cloud bus rubber-tyred tramcar. The construction method comprises the following steps: processing the steel beam; marking the threaded steel bolt; welding the threaded sleeve; welding the top steel plate and the threaded steel bolt; adjusting the position of the steel beam; welding the steel beam and the threaded steel bolt; hoisting; linear adjustment of the two-way steel mesh construction; installation and reinforcement of the outer side formwork; installation and reinforcement of the inner side formwork; and installation and reinforcement of the inner side formwork. The application can adjust the vertical linear rail beam body, reduces the difficulty of linear rail beam body adjustment before operation, is convenient to construct, has low cost, increases the overall rigidity of the rail beam, and improves the train driving comfort.

The invention belongs to the field of building robot operation, and particularly relates to a vertical steel bar binding robot system and a control method, and the vertical steel bar binding robot system comprises a robot body, and a walking mechanism, a sensing system, a positioning and height adjusting module, a binding execution mechanism and a central control system which are arranged on the robot body; the walking mechanism is installed on the lower portion of the robot body. The positioning and height adjusting module comprises a stirrup positioning mechanism and a vertical height adjusting mechanism; the walking mechanism, the sensing system, the binding executing mechanism and the positioning and height adjusting module are all in communication connection with the central control system. The technical problems that in the prior art, an automatic binding scheme mostly aims at a horizontal reinforcing mesh, and for a vertical reinforcing steel bar binding scene, a systematic solution capable of achieving autonomous movement, precise positioning of transverse reinforcing steel bars and efficient binding of dense nodes is lacked are effectively solved.

The utility model belongs to the technical field of bridge engineering, and discloses a corrugated steel bottom plate-T-shaped steel rib plate-UHPC combined bridge deck slab which comprises a corrugated steel bottom plate, wave crests and wave troughs of the corrugated steel bottom plate are sequentially and alternately arranged in the transverse direction of a bridge deck and extend in the longitudinal direction of the bridge deck, and the wave crests and the wave troughs of the corrugated steel bottom plate are arranged in the longitudinal direction of the bridge deck. A longitudinal T-shaped steel rib plate is fixed in each trough of the corrugated steel bottom plate, a plurality of steel bar through holes are evenly distributed in the tops of webs of the T-shaped steel rib plates in the longitudinal direction, the positions of the steel bar through holes of the longitudinal T-shaped steel rib plates correspond one by one in the transverse direction, transverse steel bars penetrate through the longitudinal T-shaped steel rib plates, and a plurality of longitudinal steel bars are evenly distributed on the transverse steel bars. An ultra-high performance concrete filling layer is poured in a space formed by the corrugated steel bottom plate, the T-shaped steel rib plate and the reinforcing mesh; the problems that an orthotropic steel bridge deck is cracked due to fatigue, an asphalt pavement layer of a steel bridge deck is damaged, and a steel-UHPC combined bridge deck is complex in construction, low in speed and the like are solved.

The invention relates to the technical field of mining, and discloses a high and large stope barren rock and tailing cemented filling body artificial false bottom and a manufacturing method thereof. The artificial bottom comprises a framework structure, a waste rock layer and a tailing cementing material layer; wherein the skeleton structure comprises an upper-layer reinforcing mesh structure, a lower-layer anchor mesh structure and a steel fiber rope for connecting the upper layer and the lower layer; the skeleton structure is filled with the waste rock layer; gaps between the framework structure and the waste rock layer are filled with the tailing cementing material layer. According to the high and large stope barren rock and tailing cemented filling body artificial false bottom and the manufacturing method thereof, underground barren rock is used as main aggregate, the using amount of a cementing agent is greatly reduced, a reinforcing mesh-barren rock-cementing slurry composite flexible structure has extremely high mechanical performance, the maintenance period is remarkably shortened, the construction efficiency is improved, and the construction cost is reduced. And the construction cost is reduced.

The utility model belongs to the technical field of tunnel engineering construction, and discloses an assembly type corrugated steel plate preliminary bracing structure for a vertical shaft, which comprises an assembly type corrugated steel plate layer and a plurality of anchor rods, the assembly type corrugated steel plate layer is formed by splicing a plurality of corrugated steel plate units, and one end of each anchor rod is fixed on surrounding rock. The other end of the anchor rod is fixedly connected with the corrugated steel plate unit, and a grouting layer is filled between the assembly type corrugated steel plate layer and the surrounding rock, so that the complex links of material field processing, layered concrete spraying and the like are reduced, and the construction process is greatly simplified; in terms of construction pollution, a large amount of dust generated by sprayed concrete is avoided, the construction environment is improved, the corrugated steel plate layer cooperates with the anchor rod, the grouting layer, the reinforcing mesh and the like to form a stable supporting system, the arc-shaped corrugated steel plate body is attached to the surrounding rock, the zinc coating enhances corrosion resistance, and the foam pad improves the durability of the structure. The tunnel supporting target which is efficient, environmentally friendly, economical, stable and reliable is achieved on the whole.

The invention discloses a lightweight concrete fabricated building grouting sleeve and a grout supplementing method, and relates to the technical field of constructions.The lightweight concrete fabricated building grouting sleeve comprises a guide rail, two oppositely-arranged pouring mechanisms are slidably mounted at the upper end of the guide rail, and a bottom pouring plate is jointly arranged at the bottoms of the two pouring mechanisms; and two reinforcing meshes are symmetrically arranged at the upper end of the bottom pouring plate. The interface activity modifier is applied to an old slurry interface before slurry supplementing, deep strengthening of a lightweight concrete grouting sleeve connecting area is achieved, the interface activity modifier is guided in through the lower through pipe and the upper through pipe and evenly sprayed to a glass fiber sleeve and the inner wall of a building sleeve mechanism through the through pipe and the transverse pipe, and the strength of the building sleeve mechanism is improved. It is ensured that the modifier can effectively cover the juncture area of new and old slurry, wetting, permeating and chemical activation are conducted on the hardened cement surface, and the bonding strength of follow-up slurry supplementing materials and an original interface is improved.

The present application belongs to the field of coal mine roadway construction, and particularly relates to a method for self-forming a roadway by top cutting at a negative angle. The method comprises the following steps: drilling a field in front of a working face and close to a right side of a mining roadway; drilling anchor holes and top cutting holes along a strike and staggered construction, and installing grouting anchor cables in the field; cutting the basic roof and the immediate roof at a negative angle through the top cutting holes at the back of the working face, constructing a roadway-side gangue retaining structure, grouting through the grouting anchor cables and anchoring the grouting anchor cables on the roadway-side gangue retaining structure; and monitoring the deformation of the steel mesh at the grouting anchor cable and adjusting through a nut. The present application can ensure that the construction position of the roadway-side gangue retaining structure does not affect the width of the self-supporting roadway and the integrity of the roof by constructing a field of a certain width in advance. The negative angle top cutting holes can cut a section that is deviated to the direction of the goaf, so that the gangue formed by the collapse of the immediate roof moves to the direction of the goaf and does not move to the mining roadway in large quantities, thereby ensuring the safety of the construction in the mining roadway.