85results about How to "Reduce wet work load" patented technology

The invention relates to a prefabricated reinforced concrete beam-column joint, in particular to a single-layer prefabricated assembly type reinforced concrete beam-column joint. In order to solve the problem that the connection integrity of existing prefabricated beams and prefabricated columns is hard to guarantee, the prefabricated joint for one-piece casting manufacturing of a column section and part of beam sections is provided according to the concept of the point of inflection. The single-layer prefabricated assembly type reinforced concrete beam-column joint is formed by overall manufacturing of a vertical column section (1) and joint superposed beam sections (2) in a factory for prefabrication. A manufacturing method comprises the steps of beam-column longitudinal bar and stirrup binding, connector pre-burying, formwork erecting and concrete pouring and curing. The height of the vertical column section (1) of the joint is 1/2 of the storey height, and the length of each joint superposed beam section (2) is 1/3 of the span of adjacent columns. The vertical column section (1) comprises a pouring section (1-1), a concrete filled steel tube connector (1-2), a steel tube connector (1-3) and column section longitudinal bars (1-4). Each joint superposed beam section (2) comprises a groove-shaped pouring section (2-1), inverted-T-shaped structural steel connectors (2-2) and a reinforcement cage framework (2-3). The single-layer prefabricated assembly type reinforced concrete beam-column joint is applied to the construction industry.

The invention relates to a dual-way steel-laminated slab concrete composite floor, belonging to a new large span floor structure, comprising a cross steel beam, a prefabricated slab and a later pouring concrete layer, wherein the cross steel beam is an I shaped cross section or box section steel beam; the prefabricated slab, a common reinforced concrete slab or a prestressed concrete slab, is held on the cross steel beam and covered on the grids between the steel beams; the later pouring concrete layer is concrete poured on the prefabricated slab and the steel beam. The invention has the advantages of low structure height, high bearing capacity, stiffness, bilateral support effect, saved forming procedure and formwork, reduced the wet work amounts of site concrete, favorableness to the three-dimensional construction, and shortened construction period.

The invention relates to a connecting method of a steel beam and an existing reinforced concrete column, which can be used for reinforced modification of an existing reinforced concrete structure, and belongs to the technical field of structural engineering. The method comprises the steps of: scabbling, planting bars and binding reinforced mesh pieces on the surface around with a node connection domain of the original reinforced concrete column; processing two pieces of channel steel and welding a stud connection piece inside; extending an extending bracket and external reinforcing plate on the channel steel connected to the steel beam; buckling the two pieces of channel steel and wrapping the original reinforced concrete column; welding in an abut manner; pouring node area concrete; and finally connecting the steel beam. The method overcomes the deficiencies of the conventional connection method, is simple in structure, quick and convenient to construct, good in stress performance of the connecting node, reliable in force transfer, and can efficiently prevent a node core area from cracking and being exposed. The core area concrete is wrapped by a steel plate so that the concrete is strongly constrained, and the quake-proof ductility of the node is good. The method has high practicality and wide application prospect.

The invention discloses a locally uncombined suspension bridge steel-concrete combined bridge deck system and a construction method of the combined bridge deck system, and belongs to the technical field of bridge structures. The bridge deck system consists of concrete slabs, longitudinal steel beams, cross steel beams, air nozzles and toggle pin connectors; and a suspension bridge section steel-concrete combined bridge deck system is prefabricated in a factory. The prefabricated concrete slabs and section steel main beams form a whole through concrete wet joints and the toggle pin connectors. The prefabricated concrete slabs and cast-in-place concrete joints are only connected with the cross steel beams to form a whole through the toggle pin connectors, the longitudinal steel beams are not provided with the toggle pin connectors, and meanwhile, the toggle pin connectors are not arranged in a certain area of the ends of the cross steel beams at hoisting points. The problems of cracking, complex structures of toothed grooves at the slab ends of the prefabricated concrete slabs and the like due to the factors of temperature, contraction, creep and the like of the concrete slabs of the traditional suspension bridge combined bridge deck system are solved by adopting a locally uncombined technology on the premise of keeping the consumption of steel, the manufacturing process of the prefabricated slabs is simplified, the bearing capacity, the rigidity and the cracking resistance of the structure are improved, and the durability of the structure is improved.

The invention discloses a connecting node of an assembled whole thick prefabricated slab. Connecting steel bars are reserved on the connecting surface of a prefabricated slab unit in the mode, the exposed parts of the connecting steel bars are ' '-shaped, and the exposed parts and the connecting surface form a closed polygon. In the connecting mode for the prefabricated slab unit and a beam or a wall, the connecting steel bars of the prefabricated slab unit are inserted with steel bars configured for the beam or the wall together at the connecting positions in a penetrating mode. Viewing from the cross section of the whole connecting node, the connecting steel bars and the steel bars configured for the beam or the wall form a single closed stirrup or a composite stirrup, and longitudinal bolt steel bars penetrate into the inner corner position of the single closed stirrup or the composite stirrup. The connecting node of the whole thick prefabricated slab unit can achieve the equivalent performance as a prefabricated slab connecting nodes and a cast-in-place concrete structure while achieving higher prefabrication rate and assembly rate. The invention further provides the whole thick prefabricated slab unit for achieving the connecting mode.

Disclosed are an assembly-type T-shaped mixed coupled wall and a construction method thereof. The assembly-type T-shaped mixed coupled wall comprises a first wall unit and a second wall unit which are connected together perpendicularly and form a T shape. Both the first wall unit and the second wall unit are prefabricated parts, and the first wall unit and the second wall unit are connected through a joint post-pouring belt. According to the assembly-type T-shaped mixed coupled wall, steel beams are used for replacing concrete beams and section steel columns are used for replacing edge constraint reinforced concrete embedded columns, so that the mixed coupled wall has better energy-dissipating capacity and progressive-collapse-resistant capacity than a traditional coupled wall; prefabrication and on-site installation are conducted at the same time, therefore, the problems that the quantity of wet construction on a construction site is large and a lot of construction waste is generated are solved, building operating requirements can be met conveniently, and assembly procedures can be simplified conveniently; after butt welding is conducted on joint short beams, high rigidity is formed between the wall units, therefore, the stability of wall bodies in the construction process is facilitated, the procedure that a shear wall is prefabricated to be used as a temporary support is omitted and the construction efficiency is guaranteed. The construction method can be widely applied to construction of mixed coupled walls in constructional engineering.

The invention relates to the field of prefabricated concrete structures, in particular to an assembly type concrete truncated pyramid type foundation and column steel connecting structure and an assembling method. A prefabricated column is composed of in-column longitudinally stressed rebars, column tie-bars, a prefabticated member under the columns and concrete, the in-column longitudinally stressed rebars vertically arranged in the shaped of a square are connected through the column tie-bars to form a frame structure, the bottom face of the frame structure is welded to the prefabticated member under the columns. Bolt bar assemblies in the truncated pyramid type foundation are arranged in the longitudinally stressed rebars in the truncated pyramid type foundation, and uniformly provided with long bolt bars through a long bolt bar constraint steel plate, prefabricated truncated pyramid type foundation framework is formed, concrete is poured around a prefabricated truncated pyramid typefoundation framework, and the prefabricated truncated pyramid type foundation is obtained. Accordingly, on the premise that prefabricated concrete members are connected, the workload of wet construction is reduced as much as possible, the construction speed is greatly increased, and construction quality is greatly improved.

The invention discloses an assembled concrete structure construction method. According to the construction method, a reversed construction procedure is adopted for installation of a vertical component of a currently constructed floor, that is, before connection assembly of a horizontal component of the currently constructed floor, the vertical component connected to the upper portion of the horizontal component is hoisted firstly, and finally connection concrete is poured at a time to connect the horizontal component with the vertical component of the currently constructed floor into a whole. The construction method adopts the reversed construction procedure, so that construction links are reduced, and the construction period is shortened; the method is suitable for assembled concrete building construction for structure systems such as precast shear walls, composite wallboards and frameworks, and has the advantages of convenient construction, time saving, economy, environment friendliness and the like; and meanwhile, the requirement for identical performance as a cast-in-place structure is met.

The invention relates to the field of prefabricated assembly type concrete structure buildings, in particular to a concealed beam type connecting fully-prefabricated concrete plate structure and manufacturing and assembling methods. Fully-prefabricated concrete plates are formed in the mode that concrete is poured into formwork structures; longitudinal steel bars and transverse steel bars are arranged in the fully-prefabricated concrete plates horizontally and are each of the structure with the two ends being bent on the inner side of the corresponding fully-prefabricated concrete plate; and vertical sections between the bottom edges of the longitudinal steel bars and the transverse steel bars and the bent sections of the longitudinal steel bars and the transverse steel bars are arranged on the outer sides of the fully-prefabricated concrete plates. According to the concealed beam type connecting fully-prefabricated concrete plate structure, concealed beam longitudinal steel bars penetrate through closed hoops formed by lap joint of the exposed steel bars of the two prefabricated concrete plates, then, concrete is poured, and thus the plates are connected; the concealed beam longitudinal steel bars penetrate through the closed hoops formed by lap joint of in-beam reserved connecting steel bars and the exposed steel bars of the prefabricated concrete plates, then, the concrete is poured, and thus fixing of the plates on beams is completed; and the requirement for plate and beam connection in actual engineering is completely met.

The invention discloses a truss concrete superposed beam comprising a prefabricated layer and a superposed layer, wherein the prefabricated layer comprises a truss reinforcing mesh and a concrete layer at the lower part of the truss reinforcing mesh; the truss reinforcing mesh comprises a truss, erection steel bars and stirrups; the truss comprises a lower chord member, an upper chord member and a web member for connecting the lower chord member and the upper chord member; the upper chord member of the truss is positioned above the concrete of the prefabricated layer; the superposed layer is a cast-in-place concrete layer positioned on the prefabricated layer. The truss concrete superposed beam disclosed by the invention has the advantages of convenience and quickness in construction without temporary shoring, capability of providing a relatively longer laying length for a floor slab, quality guarantee, good integrity and good economical efficiency.

Disclosed are an assembly-type cross-shaped mixed coupled wall and a construction method thereof. The assembly-type cross-shaped mixed coupled wall comprises first wall units and a second wall unit which are connected together perpendicularly and form a cross shape. The first wall units are symmetrically distributed on the two sides of the second wall unit, the first wall units and the second wall unit are all prefabricated parts, and the first wall units and the second wall unit are connected through joint post-pouring belts. According to the assembly-type cross-shaped mixed coupled wall, steel beams are used for replacing concrete beams and section steel columns are used for replacing edge constraint reinforced concrete embedded columns, so that the mixed coupled wall has better energy-dissipating capacity and progressive-collapse-resistant capacity than a traditional coupled wall; prefabrication and on-site installation are conducted at the same time, therefore, the problems that the quantity of wet construction on a construction site is large and a lot of construction waste is generated are solved and assembly procedures are simplified; after butt welding is conducted on joint short beams, high rigidity is formed between the wall units, therefore, the stability of wall bodies in the construction process is facilitated, the procedure that a shear wall is prefabricated to be used as a temporary support is omitted and the construction efficiency is guaranteed. The construction method can be widely applied to construction of mixed coupled walls in constructional engineering.

The invention provides an assembly method of upper and lower interior walls and floors, including the following steps: S1, prefabricating interior wall shear walls and floors; S2, hoisting and installing: a first interior wall shear wall is hoisted and positioned, a first floor and a second floor are respectively hoisted on the two end faces of the top side of the first interior wall shear wall, asecond interior wall shear wall is hoisted on the top side of the first interior wall shear wall, and the two ends of the bottom side of the second interior wall shear wall are respectively pressed on the supporting ribs on the top sides of the first floor and the second floor; a cavity is formed between the floors and the first and second interior wall shear walls, and longitudinal steel bars, lacing wires and anchoring parts are ingeniously arranged in different ways; and S3, casting connection: concrete is poured into the cavity to form a double-overlapping post-poured connecting beam or adouble-anchorage horizontal post-poured strip which connects the floors and the interior wall shear walls together. The on-site construction work for the connection joint is less. The construction cost is lowered, and the construction period is shortened. The integrality and seismic strength of the building are greatly improved.

The invention relates to a prefabricated concrete-filled steel tube overlapped pier and belongs to the technical field of bridge engineering. The prefabricated concrete-filled steel tube overlapped pier comprises a prefabricated concrete-filled steel tube column, a prefabricated concrete-filled steel tube sleeve, rebar connecting parts, steel tube connecting parts, a concrete post-cast strip, short rebars in the steel tube connecting parts, and short rebars in the rebar connecting parts. The prefabricated concrete-filled steel tube sleeve is installed outside the prefabricated concrete-filled steel tube column. The prefabricated concrete-filled steel tube column bears main constant loads of the upper structure after being connected. Self-compaction micro-expansion concrete is poured into the concrete post-cast strip. The prefabricated concrete-filled steel tube overlapped pier can be used for steel-concrete composite structure bridge systems of urban viaducts, expressway viaducts and high-speed railway viaducts, has the advantages of being high in bearing capacity and excellent in anticorrosion capacity, can improve the capacity of resisting rare occurrence earthquakes by a bridge and durability, is high in construction speed and low in influence on traffic, and has wide engineering application prospects.

The invention discloses a combined type base of a building, a ring beam and a combined type shell frame formed by the bases and the ring beams. Each part is a concrete prefab standard element. When a house is built, the prefab standard elements only need to be carried to a jobsite and can be assembled into the shell frame according to the building requirements of the house. In the course of the assembly of the shell frame, the invention has no wet construction, and the labor intensity of an operator is low. More importantly, the construction period is greatly shortened. If a prefab lamella cast-in-situ superimposed hollow floor in a patent application submitted by the inventor previously is used, the wet construction in the course for building the house can be lowered to be the lowest, the construction period can be lowered to be the shortest, and especially when serious disasters and accidents happen, the house with the combined type shell frame structure has more outstanding advantages.

The invention belongs to the field of prefabricated building structures, and particularly relates to a spliced joint of prefabricated concrete shear walls and a construction method thereof. The spliced joint comprises a prefabricated concrete wall body and a double-layer reinforcing mesh arranged in the prefabricated concrete wall body; and splicing steel plates used for connecting an upper prefabricated concrete shear wall and a lower prefabricated concrete shear wall are pre-buried in the upper end and the lower end of the prefabricated concrete wall body and extend out of the prefabricatedconcrete shear walls to be arranged. According to the spliced joint and the construction method thereof, the prefabricated concrete shear walls connected by adopting the steel plates are manufacturedin a workshop, the upper shear wall and the lower shear wall can be spliced on site just in a bolted connection mode or a welded mode, the advantage that steel structures are convenient to connect andthe advantage of the strength of concrete are well combined, and therefore the traditional site wet construction amount can be greatly decreased, the defect that site construction is difficult due tothe fact that the prefabricated concrete shear walls are connected by adopting a grouting sleeve can be overcome, the prefabrication rate and the construction speed can be increased, and the splicedjoint and the construction method thereof are particularly suitable for prefabricated buildings.

The invention discloses a steel structure support-free fully-prefabricated concrete floor slab connecting joint and a connecting method, and solves the technical problem that in the prior art, the overall construction progress is influenced by low construction efficiency caused by large wet construction amount during steel structure house floor slab construction. The connecting joint comprises a steel beam, a first span concrete prefabricated slab, a first connecting piece, a second span concrete prefabricated slab, a second connecting piece and a filling structure. The connecting method mainly comprises the steps that the angle steel is anchored to the ends of the concrete prefabricated slabs, the ends of the concrete prefabricated slabs are directly connected to the steel beam in a lap joint mode, the angle steel is connected through bolts, the angle steel is connected with the steel beam through bolts, and finally micro-expansion fine aggregate concrete is densely poured on an upperwing plate of the steel beam. The connecting joint is simple in structure, scientific and reasonable in design and convenient to use, and the fully-prefabricated floor slabs are stably connected in the steel structure, so that the wet work amount during steel structure house floor slab construction is reduced, the overall construction efficiency is improved, and the construction progress is guaranteed.

The invention relates to a structure of a steel-concrete combined structural aqueduct and a construction method thereof, and belongs to the technical field of building structures. The steel-concrete combined structural aqueduct comprises an upper concrete groove body, a groove body top steel pull rod and a lower steel beam, wherein the upper concrete groove body adopts a rectangular or U-shaped cross section, and the lower steel beam is arranged along the longitudinal through length of the groove body, and is connected with the upper concrete groove body through a connecting piece to form a whole; the side wall of the groove body is reinforced through the mode that a variable cross section is adopted, an L-shaped thin steel plate is pasted on the inner side or prestressed reinforcements are arranged in the vertical direction; and the top of the side wall of the groove body is connected in a pulled mode through adopting the steel pull rod. According to the structure of the steel-concrete combined structural aqueduct, the stress state and the construction detail of a traditional concrete aqueduct are changed, so that the aqueduct does not need to rely on a large amount of prestressedtendons to control concrete cracking, the water conveying safety of the aqueduct is greatly improved, the structure is simple, the construction is convenient, and the economy and the practicability are achieved.

The invention relates to the technical field of building floor slabs, in particular to a building floor slab and a composite floor system. A precast concrete slab is included, bottom steel bars are embedded in the bottom of the precast concrete slab, a plurality of edge reinforcement pieces are embedded on the precast concrete slab, the edge reinforcement pieces and the bottom steel bars are fixed, the edge reinforcement pieces are located at the edge portions of the precast concrete slab, and the boundary connection strength is better.

The invention discloses a T-shaped rigid seam coupled wall with a pre-embedded seam beam segment, and a construction method thereof. The coupled wall comprises a first wall unit and a second wall unit which are mutually vertically connected and form a T shape, wherein the first wall unit and the second wall unit are both prefabricated members and the two are connected through a seam post-cast strip. The node connection is safe and reliable, the antivibration performance is good, and at the same time, factory fabrication and onsite installation are also carried out simultaneously; and wall assembling units are prefabricated in a factory, splicing installation is performed in a field, structural members are manufactured and installed at the same time, the construction speed of a main body structure is improved, it is guaranteed that a construction project is completed on schedule, in a construction process, through structural assembling and combination, the wet construction amount of a concrete field is reduced, the application quantities of templates and temporary supports are reduced, building garbage is reduced, the requirements for saving materials and protecting environment are realized, and the purpose of green construction is ahiceved.