47results about How to "Guaranteed shear performance" patented technology

The present invention relates to a technical process for reinforcing functional gradient material interface of shield-driven tunnel concrete segment by utilizing FRP rib. Said technical process includes the following steps: (1), creating FRP rib anchorage reinforcement transition zone; laying and sticking flexible FRP mesh fabric on the surface of reinforcing cage in reinforced concrete segment steel mould, on the mesh fabric distributing FRP ribs according to the point lattice form to form FRP rib anchorage reinforcement transition zone, in which the FRP ribs and FRP mesh fabric are adhered together and formed into an integral structure; (2), in the reinforced concrete segment steel mould pouring the high-performance concrete whose strength grade is greater than C50 to upper surface of reinforcing cage to form reinforced concrete structure layer; and (3), utilizing pumping process to pour high-antipermeable protective concrete to surface of steel mould on the reinforced concrete structure layer to form high-antipermeable protective layer.

The invention discloses a core tube inverse superimposed underground diaphragm wall. The core tube inverse superimposed underground diaphragm wall comprises a core tube underground diaphragm wall body below a raft top elevation and a core tube underground diaphragm wall body above the raft top elevation. The underground diaphragm wall body below the raft top elevation comprises first advance width sections and first follow-up width sections. The underground diaphragm wall body above the raft top elevation comprises second advance width sections, second follow-up width sections, connecting beams, post-pouring gap sections arranged at the connecting positions of the second advance width sections and the second follow-up width sections and the connecting positions of the width sections and the connecting beams, and outer lining walls arranged at the outer sides of the width sections and the post-pouring gap sections. Wall body lacing wires and stirrups are pre-embedded in the two side edges of steel reinforcement cages of the second advance width sections and the second follow-up width sections respectively. Box irons are pre-embedded in the end portions of the two sides of the second advance width sections and the second follow-up width sections, and the box irons stretch into the underground diaphragm wall body below the raft top elevation. The invention further discloses a construction method for the core tube inverse superimposed underground diaphragm wall. According to the core tube inverse superimposed underground diaphragm wall, the outer lining walls are arranged additionally on the two sides of the underground diaphragm wall body above the raft top elevation, and the problem that an existing underground diaphragm wall is insufficient in carrying capacity is solved; in addition, two different underground diaphragm wall connecting modes are adopted, so that not only are requirements for stressing and constructing met, but also the shear performance of the underground diaphragm wall is guaranteed.

The invention relates to a prefabricated pile foundation pier and a construction method thereof, comprising a prefabricated pile, a prefabricated bearing cap and a prefabricated pier column, wherein the pile foundation pier is integrally connected by a first connection structure for connecting the prefabricated pile and the prefabricated bearing cap and a second connection structure for connectingthe prefabricated pier column and the prefabricated bearing cap; the first connection structure connects the precast pile and the bearing cap into a whole, which ensures the reliability of the connection between the pile and the bearing cap, and at the same time satisfies the sufficient compression, bending and shearing capacity and certain tensile capacity at the pile top. The second connectionstructure connects the precast pier column with the cap, and ensures that the bottom of the pier has sufficient compression, bending, shear and ductility seismic capacity. Compared with the prior art,the invention is conducive to realizing the whole bridge segment assembly construction of the concrete bridge, improving the construction quality, greatly accelerating the construction process, shortening the construction period, reducing the adverse impact on the environment, reducing the construction noise and the like.

The invention relates to the technical field of assembled steel tube high-strength concrete columns, and discloses the assembled steel tube high-strength concrete columns and a construction method thereof. The assembled steel tube high-strength concrete columns are formed by sequential connecting of prefabricated standard column joints, and the standard column joints comprise steel tubes, high-strength concrete, stiffening ribs and ordinary concrete, wherein the high-strength concrete is poured in the steel tubes; the stiffening ribs are arranged on the outer side of the steel tubes in a surrounding mode, and the ordinary concrete is poured at the outside of the steel tubes; the high-strength concrete is high-strength concrete with added iron tailings and construction waste; vertical rib groups are fixed to the inner walls of the steel tubes in a welded mode; horizontal end plates are arranged on the outer circumferences of the steel tubes along the section direction in a surrounding mode; through holes are evenly formed in the horizontal end plates at intervals; the stiffening ribs penetrate through the through holes and are arranged in the length directions of the steel tubes in a full-length mode; one ends of the stiffening ribs extend out of the standard column joints, and the other ends of the stiffening ribs are provided with half grouting sleeves which are connected with the stiffening ribs extending out of the adjacent standard column joints. The assembled steel tube high-strength concrete columns are fireproofing, corrosion resisting, high in bearing capacity, and excellent in durability.

The invention provides a hollow pier prefabricated inter-segment connecting device and a construction method thereof.The connecting device comprises embedded steel plates, U-shaped steel bars, rubberplates, upper/lower connecting steel plates, upper/lower shear-resistant steel plates and filling plates, the embedded steel plates are embedded in the inner surfaces of prefabricated segments, the U-shaped steel bars are welded to the embedded steel plates, parts of the U-shaped steel bars extend into the prefabricated segments, and parts extend out of the embedded steel plates; threads are arranged on the extending portions, and the rubber plate, the upper connecting steel plate and the lower connecting steel plate are connected with the embedded steel plate through connecting bolts. And after the upper prefabricated segment and the lower prefabricated segment are assembled, the upper shear-resistant steel plate is connected with the upper connecting steel plate through high-strength bolts, the lower shear-resistant steel plate is connected with the lower connecting steel plate through high-strength bolts, filling plates are plugged between the upper shear-resistant steel plate and the lower shear-resistant steel plate, and the upper shear-resistant steel plate is connected with the lower shear-resistant steel plate through high-strength bolts. The connecting device disclosed bythe invention meets the requirements of different procedures in the assembling process of the prefabricated sections, and realizes the functions of hoisting, section position positioning, section linear adjustment, section glue joint prepressing, temporary locking and the like.

The invention discloses a highly seismic region prefabricated assembled bridge central pier stud-cover beam node pouring connection mode and construction and belongs to the field of bridge engineering. The construction comprises a prefabricated pier stud and a prefabricated cover beam. The prefabricated pier stud and the prefabricated cover beam are connected into a bridge pier system through pouring of high-performance materials and splicing. The prefabricated pier stud is composed of a pier stud longitudinal bar, a pier stud stirrup, an overlap-joint large-diameter longitudinal bar, an overlap-joint stirrup and an inclined rebar jointly. The prefabricated cover beam comprises a grouting pipeline, a cover beam construction stirrup and a pouring inserting groove. The splicing quantity of the pier stud longitudinal bar is only a half or much less of the total quantity of longitudinal stressed rebars, and high-performance materials are adopted for pouring splicing. Small damage to a post-earthquake pier stud plastic hinge region is ensured while a large-diameter overlap joint longitudinal bar meets the bridge anti-seismic requirement in a highly seismic region. The bridge building speed can be increased greatly and construction convenience is improved greatly while the bridge anti-seismic requirement in the highly seismic region is met and construction quality is ensured, and a completely novel technical solution can be provided for prefabricated assembled bridge engineering application in the highly seismic region.

The invention discloses a reinforced masonry wall structure filled with rammed earth and a construction method thereof. The masonry wall structure is formed by bonding a plurality of hollow blocks with mortar, wherein the hollow blocks are arranged in sequence in the vertical direction. Every two hollow blocks adjacent in the vertical direction are connected in a staggered-seam lap joint mode, cavities of the hollow blocks are aligned one by one, and thus through cavities extending from first hollow blocks to the top hollow blocks are formed; all the through cavities are filled with rammed earth, and thus rammed earth core columns are formed. The construction method includes the steps that firstly, bottom mortar is laid, and the first hollow blocks are stacked on the bottom mortar; secondly, mortar is smeared on the upper surfaces of the first hollow blocks, the second hollow blocks are stacked in a staggered-seam lap joint mode, and the cavities are completely aligned in the vertical direction; thirdly, the cavities of the blocks are filled with mixed raw earth, and filling and ramming are performed at the same time till the 1/3-1/2 height position of the second hollow blocks is reached; fourthly, the third hollow blocks are built and then filled with raw earth, ramming is performed till the 1/3-1/2 height position of the third hollow blocks is reached, and the process is performed in this way till the last hollow block is built and the cavities are full of the rammed earth. The anti-shear property and integrality of the masonry wall are guaranteed.

The invention provides an integrated formwork-removal-free building system and a construction method thereof, and belongs to the technical field of fabricated buildings. The system comprises a floor support plate, a shear wall, a structural column and a structural beam. A bottom face of the floor support plate, two side faces of the shear wall, side faces of a periphery of the structural column and side faces and a bottom face of the structural beam are all of an integrated formwork-removal-free face structure. The integrated formwork-removal-free face structure comprises a removal-free formwork, a plurality of first connecting strips and a plurality of trusses sequentially arranged from outside to inside; the trusses on the floor support plate, the structural column and the structural beam are all connected with structural main reinforcements; two sets of second connecting strips and a heat preservation plate are further arranged between two side faces of the shear wall; and the floor support plate, the shear wall, the structural column and the removal-free formwork of the structural beam are all spliced in a sealed mode. The construction method is used for constructing the system. The whole structure of the integrated formwork-removal-free building system belongs to a fabricated structure, the reinforced concrete structure can be continuously poured, such that the whole structure is integrated, the structural strength can be guaranteed, construction can be facilitated, and forming quality is good.

A hinge joint sealing connection device comprises a connection part for connecting two adjacent hollow plates, a filling part filled in the hinge joint and a bridge deck pavement layer laid on the topsurface of the hollow plates. The hinge joint sealing connection device comprises a connection part for connecting two adjacent hollow plates, a filling part filled in the hinge joint and a bridge deck pavement layer laid on the top surface of the hollow plates. The connecting part comprises a plurality of sets of connecting pieces arranged in the hinge joint at intervals along the width direction of the bridge; The connector comprises a connecting plate which is laid on the top surfaces of two adjacent hollow plates and covers the hinge joints along the bridge length direction, and the two ends of the connecting plate along the bridge length direction are fixed on the top surfaces of the two adjacent hollow plates by fixing devices respectively. The connectors also include an upper horizontal connection group, a lower horizontal connection group, and a cross connection group. The filling portion is a first concrete filled in the hinge joint. The pavement layer comprises a concrete layer formed by pouring a second concrete on the top surface of the hollow slab, and the concrete layer is paved with a reinforcing steel mesh which is fixedly connected with the connecting part.

The invention discloses a high-strength box-type combination column and a preparation method thereof. The high-strength box type combination column is characterized in that the high-strength box-type combination column comprises two C-type steel plates and four column plates made of bamboo/wood, the two C-type steel plates define a box-type framework, the four column plates are respectively pasted and fixed on four outer surfaces of the box-type framework, a plurality of transverse partition plates distributed at intervals in the length direction are arranged in the box-type framework, a connecting screw rod penetrates through a first connecting hole, a second connecting hole and a third connecting hole, then the two ends of the connecting screw rod are fixed through cushion blocks and nuts, and polygonal holes are formed in the cushion blocks. The high-strength box-type combination column has the advantages that the overall weight and cost are reduced, and meanwhile the bending resistance and the shearing resistance of the box-type column are guaranteed; and in addition, due to the fact that the transverse partition plates are fixedly connected with the box-type framework through the connecting screw rod, later replacement and maintenance of the box-type combination column are facilitated, when the box-type combination column is damaged due to stress, the box-type combination column can be conveniently disassembled only by heating to melt epoxy resin glue, and repeated use can be achieved by replacing the damaged part of the box-type combination column.

The invention discloses a hollow brick with a U-shaped section. The hollow brick comprises a main body, wherein the section of the main body is a U-shaped section; the U-shaped section is divided into a vertical wall A and a vertical wall B, wherein the wall A is 3-4 times thicker than the wall B; a heat-preserving-material filling hole is formed in the inner part of the wall A; through holes are formed in the inner part of the wall B, surrounding the heat-preserving-material filling hole, and the bottom of the main body. The hollow brick disclosed by the invention has the benefits that because the section of the main body of the hollow brick is the U-shaped section, when concave wall bodies are needed during building construction, a formed hollow-brick structure does not need to be damaged by building workers, so that the anti-shock performance of the hollow brick and the anti-shear performance of the hollow brick are guaranteed; besides, the heat-preserving-material filling hole is formed in the inner part of the wall A, and the heat preserving materials can be directly added in the heat-preserving-material filling hole during production to realize factory prefabrication, so that the time for building construction is greatly shortened.

The invention discloses a post insulator and a composite cross arm. The post insulator comprises: an insulator; an umbrella skirt wrapping the periphery of the insulator; and a first connecting fitting connected with the end of the insulator and comprising a flange cylinder, wherein the flange cylinder is of a hollow structure in the axial direction and is arranged at the end of the insulator in a sleeving mode, the inner wall of the flange cylinder is provided with a plurality of cementing grooves formed in the axial direction at intervals, the cementing grooves are equal in width, and the width of each cementing groove is smaller than the width of the interval between every two adjacent cementing grooves. Through the arrangement, the strength of the post insulator can be improved.

The invention relates to a channel steel-concrete composite beam and a manufacturing method thereof, and belongs to the technical field of bridge engineering. The channel steel-concrete composite beamcomprises a steel beam and a bridge deck, wherein the steel beam comprises an outer beam and an inner beam which are made of large channel steel and small channel steel respectively; the inner beam is placed in a groove cavity of the outer beam, a bottom plate of the inner beam is abutted with a bottom plate of the outer beam, and series connection holes are respectively formed in side plates onthe left and right sides of the outer beam and the inner beam and are connected in series through series connection ribs; inclined notches and vertical notches which are in one-to-one correspondence are formed in the top ends of the side plates of the inner beam and the outer beam; and the bridge deck stretches across the steel beam, at least one part of steel bars at the bottom of the bridge deckpenetrate through the inclined notches and the vertical notches, and concrete of the bridge deck wraps the steel bars, the series connection bars and the top end of the steel beam, so that the steelbeam and the reinforced concrete bridge deck are connected into a whole. The channel steel-concrete composite beam has the advantages of the simple structure, no need of welding and high bearing capacity.

The invention relates to a bolt connection structure for manufacturing a tank body and a manufacturing method thereof and belongs to the field of civil engineering. The bolt connection structure for manufacturing the tank body and the manufacturing method thereof are used for solving the problems that tank body structures of nuclear power station containments and oil storage tanks in large energystructure engineering in the prior art are high in site construction difficulty, long in period, high in construction cost, inconvenient to construct during site welding construction and low in safetycoefficient. The bolt connection structure comprises four square modules and four hexagonal joint modules; the four square modules are spliced into a square block body, and every two adjacent squaremodules are fixedly connected through a corresponding hexagonal joint module and a plurality of bolts; and the connection positions of the square modules and the hexagonal joint modules are fixedly connected through self-compacting concrete.

The invention discloses a local UHPC (Ultra High Performance Concrete) recoverable function self-resetting prefabricated bidirectional coupled high-speed rail pier which comprises a bearing platform and a cover beam supported above the bearing platform through a vertical supporting structure, and the cover beam is a prefabricated part; the vertical supporting structure comprises a prefabricated pier bottom section, a prefabricated pier-coupling beam section and an unbonded prestressed steel strand; the prefabricated pier bottom sections are fixed on the bearing platform in a matrix arrangement manner; a prefabricated pier-coupling beam section is arranged on the top surface of the prefabricated pier bottom section; the prefabricated pier-coupling beam section comprises a prefabricated pier section and a prefabricated coupling beam; a feasible structural form is provided for applying a prefabrication construction technology to the high-speed rail bridge pier, by means of the structural form, the structural rigidity requirement and the rapid construction requirement can be both considered, the shear state of the bridge pier is improved, it can be guaranteed that the bridge pier has good deformation capacity under the earthquake action, and only replaceable damage elements are damaged; the prefabricated high-speed rail pier is further developed into a post-earthquake function recoverable structure, and the requirement for toughness and earthquake resistance is met.