CN117385915A - Modularized open caisson reinforcement cage and open caisson construction method - Google Patents

Abstract

The invention relates to the construction of a steel reinforcement cage of an open caisson, in particular to a modularized open caisson steel reinforcement cage, which comprises a plurality of prefabricated modules which are regularly arranged, wherein each prefabricated module comprises a stiff framework, transverse steel bars, longitudinal steel bars and stirrups. A plurality of horizontal steel bars and longitudinal steel bars which are arranged in a flush manner are supported on the stiff framework. The transverse steel bars are connected through a transverse joint full section, the longitudinal steel bars are connected through a longitudinal joint full section, and the vertically adjacent stiff frames are rigidly connected. The transverse joint and the longitudinal joint are both primary joints. The invention also particularly relates to a construction method of the open caisson comprising the modularized open caisson reinforcement cage, which comprises the steps of preparing a prefabricated module; arranging and connecting prefabricated modules to form a bottom sunk well section; building another open caisson section above the bottom open caisson section and connecting the open caisson section with the bottom open caisson section; repeating the process for a plurality of times, and pouring concrete to form the multi-layer open caisson. The structure and the lap joint method are beneficial to improving the construction efficiency of the open caisson and improving the standardization of the open caisson reinforcement cage structure.

Description

Modularized open caisson reinforcement cage and open caisson construction method

Technical Field

The invention relates to construction of a steel reinforcement cage of an open caisson, in particular to a modularized open caisson steel reinforcement cage and an open caisson construction method.

Background

The open caisson is a shaft-shaped structure which overcomes the frictional resistance of the well wall by means of self gravity, then sinks to a designed elevation, and finally becomes a structural foundation after passing through a concrete back cover and filling a hole. According to building materials, open caissons can be classified into concrete open caissons, reinforced concrete open caissons, steel open caissons, brick open caissons, and the like, wherein reinforced concrete open caissons are most common.

At present, a reinforced concrete open caisson is generally constructed by fixing a stiff framework at a preset position, installing steel bars by taking the stiff framework as a standard object and pouring concrete. The open caisson is built by the method, and a lot of time is spent on building the reinforcement cage on the site after the site preparation is finished.

Disclosure of Invention

The invention aims to provide a modularized open caisson reinforcement cage convenient to quickly build and an open caisson building method.

In order to achieve the above purpose, the present invention provides the following technical solutions:

a modular open caisson rebar framework comprising:

the prefabricated module comprises a stiff framework, a plurality of transverse steel bars, longitudinal steel bars and stirrups, wherein the transverse steel bars and the longitudinal steel bars are supported on the stiff framework, the ends of the transverse steel bars are mutually flush, the ends of the longitudinal steel bars are mutually flush, and the stiff framework above is rigidly connected with the stiff framework below;

the transverse connectors are used for connecting the transverse steel bars corresponding to the positions in the adjacent prefabricated modules;

and the longitudinal joint is used for connecting the longitudinal steel bars corresponding to the positions in the adjacent prefabricated modules.

Optionally, the transverse reinforcement and the longitudinal reinforcement are both rigidly connected to the stiff skeleton.

Optionally, the transverse reinforcement and the longitudinal reinforcement are both connected to the stiff skeleton by spot welding.

Optionally, the transverse joint is configured to be selected as a primary mechanical connection joint when the diameter of the transverse rebar is any one of 25mm-36mm, and to be selected as a lap joint when the diameter of the transverse rebar is any one of 16mm or more and less than 25 mm; the longitudinal joint is configured to be selected as a primary mechanical connection joint when the diameter of the longitudinal bar is any one of 25mm to 36mm, and to be selected as a lap joint when the diameter of the longitudinal bar is any one of 16mm or more and less than 25mm.

Optionally, the prefabricated modules arranged at the same height are mutually connected to form a layer of open caisson section, and the prefabricated modules in the same open caisson section have the same height.

Optionally, the same open caisson section comprises a plurality of prefabricated modules with different structures.

Optionally, the modular open caisson reinforcement cage further comprises reinforcing ribs, wherein the reinforcing ribs are paved on the manual site.

In a second aspect, the invention also provides a method for constructing an open caisson comprising the modular open caisson reinforcement cage, which comprises the following steps:

s1, connecting the transverse steel bars and the longitudinal steel bars to preset positions of the stiff framework, and connecting the stirrups to form a prefabricated module;

s2, arranging and fixing a plurality of prefabricated modules at preset installation positions in a hoisting mode, and connecting the transverse joints with the transverse steel bars of the adjacent prefabricated modules to form a single-layer open caisson section;

s3, repeating the step S2 to form an upper open caisson section above the lower open caisson section, rigidly connecting the lower open caisson section with the stiffness framework of the prefabricated module of the upper open caisson section, and connecting the longitudinal steel bars of the prefabricated modules of the lower open caisson section and the upper open caisson section through the longitudinal connectors;

s4, stacking and fixing a plurality of layers of open caisson sections, and pouring concrete for a plurality of times to form the multilayer open caisson.

Optionally, stacking and fixing a plurality of layers of the open caisson sections in the step S4 and pouring with concrete several times, and forming the multi-layer open caisson includes:

s401, stacking and connecting a plurality of layers of open caisson sections to form a multi-section open caisson framework;

s402, pouring concrete into the multi-section open caisson skeleton to form a multi-layer open caisson.

Optionally, stacking and fixing a plurality of layers of the open caisson sections in the step S4 and pouring with concrete several times, and forming the multi-layer open caisson includes:

s410, stacking and fixing a plurality of layers of open caisson sections, and then pouring the partially fixed open caisson sections with concrete to expose the top of the stiff framework of the open caisson section on the top layer and the top of the longitudinal steel bars to form a bottom open caisson;

and S420, continuously stacking and fixedly connecting a plurality of layers of open caisson sections above the bottom open caisson, repeating the steps for a plurality of times until the total height reaches a preset height, and pouring the top layers of open caisson sections to form the multilayer open caisson.

According to a first aspect of the invention: and arranging and connecting a plurality of transverse steel bars, longitudinal steel bars and stirrups in a stiff framework regularly to form a prefabricated module, and assembling and connecting the prefabricated modules to form the complete open caisson steel bar framework. The prefabrication module performs prefabrication in advance through methods such as a jig frame method, and is simply assembled after finishing the construction site, and compared with the construction site which is finished and then begins to build the reinforcement cage, a large amount of time can be saved. Because most prefabricated module structures are the same or similar, the prefabricated modules can be manufactured through a pipelining method, the production efficiency is high, the structures of the prefabricated modules have high consistency, on one hand, the construction difficulty can be reduced, the requirements on construction technology of workers are lowered, on the other hand, the standardization of the reinforcement cage structure can be improved, and the quality of the reinforcement cage is improved. The upper part and the lower part are rigidly connected, so that the stability of the steel reinforcement framework is guaranteed. In the construction of the reinforcement cage, the joints among the reinforcement are arranged in a staggered mode generally so as to ensure the connection strength, and the prefabricated modules are required to be hoisted and placed and are tightly connected, so that the reinforcement cage is difficult to be applied. The prefabricated module is constructed into a structure with the horizontal steel bars being flush and the longitudinal steel bars being flush, so that the outer outline of the prefabricated module has a neat section, and the prefabricated module is convenient to place and assemble. Because the transverse steel bars and the longitudinal steel bars are connected by adopting full sections, according to the current industry standard, the mechanical joint is a primary joint for meeting the strength requirement, and the lap joint is a lap joint for meeting the lap length requirement.

Further, the transverse steel bars and the longitudinal steel bars are fixed on the stiff framework, the transverse steel bars are connected with the longitudinal stiff framework, the longitudinal steel bars are connected with the transverse stiff framework, the transverse steel bars, the longitudinal steel bars and the stiff framework form a joint stress body, the rigidity of the steel bar module is enhanced, the transverse steel bars and the longitudinal steel bars can be used as the stiff framework, the stability of the steel bar framework is improved, and the prefabricated module is convenient to store and transfer.

Further, each prefabricated module comprises a large number of transverse steel bars and longitudinal steel bars, namely, a large number of connecting points are arranged on the stiff framework and are connected in a spot welding mode, so that the connecting area is reduced under the condition of ensuring the connecting strength, and the excessive welding deformation of the stiff framework is avoided.

Further, when the diameter of the reinforcing steel bar is greater than or equal to 25mm, the mechanical connection joint is convenient to operate and higher in strength, and the joint is a primary joint due to the adoption of full-section connection.

Further, the modularized open caisson reinforcement cage is divided into multiple layers of open caisson sections, and the prefabricated modules in the open caisson sections are identical in height, so that the prefabricated modules can be assembled and connected conveniently.

Further, the open caisson has different structures at different positions, is suitable for open caisson layout requirements, and each open caisson section comprises prefabricated modules with different shapes and structures, so that construction convenience is improved under the condition of ensuring strength.

Further, the modularized open caisson reinforcement cage comprises prefabricated modules and reinforcing ribs, so that the strength of the modularized open caisson reinforcement cage is guaranteed, the construction difficulty of the prefabricated modules is reduced, and the efficiency is improved.

According to a second aspect of the invention: the transverse steel bars and the longitudinal steel bars are regularly arranged and connected to the stiff framework, the prefabricated modules are formed through the stirrup reinforcing structure, a plurality of prefabricated modules are connected to form single-layer open caisson sections, and the multiple-layer open caisson sections are stacked and connected and poured to form the multiple-layer open caisson. Through preparing prefabricated module in advance, transfer construction site to assemble and build, help improving and build efficiency, and easy operation is convenient, has higher universality and practicality, and can arrange the opportunity of pouring the subsidence in a flexible way according to the construction demand, be convenient for nimble adjustment construction plan.

Furthermore, after the open caisson reinforcement cage is built, pouring is performed uniformly, and the operation is simpler and more convenient.

Further, after the construction of the multiple layers of open caisson sections is finished, pouring is performed to form a bottom open caisson, sinking is performed, then construction and pouring are performed on the upper portion of the bottom open caisson, sinking is performed again until the multiple layers of open caisson with preset heights are formed, operation is distributed, operation height is reduced, and accordingly operation difficulty is reduced.

The foregoing description is only an overview of the present invention, and is intended to provide a better understanding of the present invention, as it is embodied in the following description, with reference to the preferred embodiments of the present invention and the accompanying drawings.

Drawings

FIG. 1 is a schematic diagram showing the distribution of prefabricated modules of a bottom section of an open caisson according to an embodiment of the present invention;

FIG. 2 is a schematic view of the structure and lifting manner of a stiff skeleton of a class D prefabricated module according to an embodiment of the present invention;

FIG. 3 is an enlarged schematic view at Z in FIG. 2;

FIG. 4 is a left side view of a B-class module and a stiffener attached to the B-class module according to one embodiment of the present invention;

FIG. 5 is a top view of a stiff skeleton of a class A preform module in accordance with an embodiment of the present invention;

fig. 6 is a front view illustrating a connection manner of a cross frame, a longitudinal frame, a transverse reinforcement and a longitudinal reinforcement according to a first embodiment of the present invention;

fig. 7 is a left side view illustrating a connection manner of a cross frame, a longitudinal frame, a transverse reinforcement and a longitudinal reinforcement according to a first embodiment of the present invention;

fig. 8 is a plan view illustrating a connection manner of a cross frame, a longitudinal frame, a transverse reinforcement and a longitudinal reinforcement according to a first embodiment of the present invention;

fig. 9 is a flowchart illustrating a method for constructing an open caisson according to an embodiment of the present invention.

Legend description: 1. a well wall; 2. partition walls; 21. a transverse wall; 22. a vertical partition wall; 3. prefabricating a module; 301. a class A prefabrication module; 3011. a transverse end; 3012. a vertical end; 3013. a corner end; 302. a B-type prefabricated module; 303. a C-1 type prefabricated module; 304. c-2 class prefabrication modules; 305. class D prefabrication module; 311. transverse steel bars; 312. longitudinal steel bars; 313. stirrups; 314. a stiff skeleton; 315. a cross frame; 3151. a long side; 3152. short sides; 3153. corner points; 316. a longitudinal frame; 3161. a hoisting hole; 317. a connecting frame; 318. a reinforcing frame; 319. reinforcing ribs; 4. and overlapping the steel bars.

Detailed Description

The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

In addition, the technical features of the different embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.

Referring to fig. 1, 2 and 4, the modular open caisson reinforcement cage according to the present invention comprises a plurality of prefabricated modules 3. The prefabricated module 3 includes a stiff skeleton 314, a plurality of transverse reinforcing bars 311 and longitudinal reinforcing bars 312 (see fig. 6) supported by the stiff skeleton 314, and stirrups 313, and the transverse reinforcing bars 311 and the longitudinal reinforcing bars 312 (see fig. 6) are arranged flush with each other, so that the prefabricated module 3 has a flat cross section. The prefabricated modules 3 are regularly arranged and connected at preset positions to form a single-layer open caisson section. And a plurality of open caisson sections are vertically stacked to form the modularized open caisson reinforcement cage. The adjacent transverse steel bars 311 with the same height are connected through a transverse joint full section, the stiffness frameworks 314 of the prefabricated modules 3 of the adjacent open caisson sections are rigidly connected, the longitudinal steel bars 312 (see fig. 6) corresponding to the positions of the adjacent open caisson sections are connected through a longitudinal joint full section, and the specifications of the transverse joint and the longitudinal joint are suitable for the specifications of the transverse steel bars 311 and the longitudinal steel bars 312 and meet the industry standard.

A plurality of transverse steel bars 311, longitudinal steel bars 312 (see fig. 6) and stirrups 313 are regularly arranged and connected to a stiff framework 314 to form a prefabricated module 3, and the prefabricated module 3 is assembled and connected to form a complete open caisson steel bar framework. The prefabrication module 3 is prefabricated in advance through methods such as a jig frame method, is simply assembled after finishing the construction site, and can save a large amount of time and reduce the requirement on the construction technology of staff compared with the construction site which is finished and then is started to build the reinforcement cage. Because the specification structure of the prefabricated module 3 has repeated or similar conditions, the prefabricated module 3 can be manufactured by a pipelining method, thereby obtaining higher production efficiency and ensuring that the structure of the prefabricated module 3 has high consistency. The prefabricated module 3 is built through the assembly line, so that the building difficulty can be reduced, the production efficiency is improved, the standardization of the steel reinforcement framework structure is also facilitated, and the overall quality of the steel reinforcement framework is improved.

In the construction of the reinforcement cage, the joints among the reinforcements are arranged in a staggered mode generally so as to ensure the connection strength, and the prefabricated modules 3 are required to be hoisted and placed, so that the adjacent prefabricated modules 3 are difficult to be tightly connected due to the staggered arrangement of the reinforcements. The prefabricated module 3 is constructed to have a structure that the ends of the transverse reinforcing steel bars 311 are flush and the ends of the longitudinal reinforcing steel bars 312 (see fig. 6) are flush, so that the outer contour of the prefabricated module 3 has a neat section, and the prefabricated module 3 is convenient to place and assemble. To meet the strength requirement, the first-stage joint is used for full-section connection of the transverse steel bars 311 and the longitudinal steel bars 312 (see fig. 6), so that the construction difficulty is reduced, and the quality requirement is met.

In some embodiments, the transverse steel bars 311 and the longitudinal steel bars 312 (see fig. 6) are fixedly connected to the stiff skeleton 314 through spot welding, so that the joint stress of the transverse steel bars 311 and the longitudinal steel bars 312 (see fig. 6) and the stiff skeleton 314 is realized, the larger connection strength is realized with a smaller connection area, and the overall strength of the steel bar skeleton is improved.

In some embodiments, the diameter of the transverse reinforcement 311 is any one of 25mm-36mm, for example, any one of 25mm, 32mm and 36mm, and the transverse joint is a primary mechanical connection joint, for example, a straight thread sleeve, a cold extrusion sleeve or a taper sleeve locking reinforcement joint; in some embodiments, the transverse bar 311 has a diameter greater than or equal to 16mm and less than 25mm, such as 16mm or 20mm, where the longitudinal joint is a lap joint. Longitudinal rebars 312 are similar to the longitudinal ties.

In some embodiments, the prefabricated modules 3 in different open caisson sections have different structures, the same open caisson section comprises a plurality of prefabricated modules 3 with different structures, the prefabricated modules 3 are convenient to assemble and connect to form the open caisson section with a shape structure meeting the design requirement, and the structure of each prefabricated module 3 is changed according to the design requirement of the height.

In some embodiments, reinforcing ribs are further arranged between adjacent open caisson sections 319, so that manufacturing difficulty of the prefabricated module 3 is reduced, and overall strength of the reinforcement cage is improved.

The method for constructing the open caisson, shown in another preferred embodiment of the application, comprises the following steps:

s1, connecting transverse steel bars 311 and longitudinal steel bars 312 (see FIG. 6) at preset positions of a stiff skeleton 314, and connecting stirrups 313 to form a prefabricated module 3;

s2, arranging and fixing a plurality of prefabricated modules 3 at preset installation positions in a hoisting manner, and connecting transverse reinforcing steel bars 311 of the adjacent prefabricated modules 3 through transverse connectors to form a single-layer open caisson section;

s3, repeating the step S2 to form an upper open caisson section above the lower open caisson section, rigidly connecting the lower open caisson section with a stiffness framework 314 of a prefabricated module 3 of the upper open caisson section, and connecting longitudinal steel bars 312 (see FIG. 6) of the prefabricated modules 3 of the lower open caisson section and the upper open caisson section through longitudinal connectors;

s4, stacking and fixing a plurality of layers of open caisson sections, and pouring concrete for a plurality of times to form the multilayer open caisson.

The transverse steel bars 311 and the longitudinal steel bars 312 (see fig. 6) are regularly arranged and connected to the stiff framework 314 to form prefabricated modules 3, a plurality of prefabricated modules 3 are connected to form single-layer open caisson sections, and multiple layers of open caisson sections are stacked and connected and poured to form the multi-layer open caisson. Through preparing prefabricated module 3 in advance, and transfer to construction site and assemble and build, help improving and build efficiency, and easy operation is convenient, has higher universality and practicality, and can arrange the opportunity of pouring the subsidence in a flexible way according to the construction demand, be convenient for nimble adjustment construction plan.

In some embodiments, step S4 includes:

s401, stacking and connecting a plurality of layers of open caisson sections to form a multi-section open caisson framework;

s402, pouring concrete into the multi-section open caisson skeleton to form the multi-layer open caisson.

In other embodiments, step S4 includes:

s410, after a plurality of layers of open caisson sections are stacked and fixed, the open caisson sections are fixed by concrete pouring, so that the top of the stiffness framework 314 of the top-layer open caisson section and the top of the longitudinal steel bars 312 (see FIG. 6) are exposed to form a bottom open caisson;

and S420, continuously stacking and fixedly connecting a plurality of layers of open caisson sections above the bottom open caisson, repeating the steps for a plurality of times until the total height reaches a preset height, and pouring all top layers of open caisson sections to form the multilayer open caisson.

After the open caisson reinforcement cage is built, casting is carried out uniformly, and the same operation is completed in a concentrated manner, so that the operation is simpler and more convenient, and the efficiency is improved; and pouring after the construction of a plurality of layers of open caisson sections is completed to form a bottom open caisson, sinking, then continuing to construct and pour above the bottom open caisson, sinking again until a multilayer open caisson with a preset height is formed, and reducing the operation height through distributed operation, so that the operation difficulty is reduced.

See in particular the examples below.

An embodiment one is a structure of a preferred modularized open caisson reinforcement cage and a construction method of the open caisson comprising the modularized open caisson reinforcement cage.

A modularized open caisson reinforcement cage is used for open caisson construction and is formed by assembling and building prefabricated modules 3 with different specifications and structures. The modularized open caisson reinforcement cage in the embodiment is formed by vertically stacking ten layers of open caisson sections, and each layer of open caisson section is formed by arranging prefabricated modules 3 with different specifications and structures at the same height and mutually connecting the prefabricated modules.

Referring to fig. 1, each layer of open caisson sections of the modular open caisson reinforcement cage in this embodiment includes a well wall 1 and a partition wall 2. The well wall 1 is of a rectangular wall-like structure. The partition wall 2 is vertically connected to the inner wall of the well wall 1, and comprises five rows of transverse partition walls 21 and five rows of vertical partition walls 22 which are uniformly distributed, so that the interior of the well wall 1 is uniformly divided into six rows and six columns of rectangular modules. The prefabricated modules 3 in the same layer of open caisson section have equal heights, so that the bottoms and the tops of the open caisson sections are flush, and the design and the standardization of the prefabricated modules 3 and the stacking connection of the open caisson sections are facilitated.

The open caisson section of the bottom layer in this embodiment includes five prefabricated modules 3 of different specifications including a class a prefabricated module 301, a class B prefabricated module 302, a class C-1 prefabricated module 303, a class C-2 prefabricated module 304 and a class D prefabricated module 305, wherein the well wall 1 portion includes two prefabricated modules 3 of different specifications including a class a prefabricated module 301 and a class B prefabricated module 302, and the partition wall 2 portion includes three prefabricated modules 3 of different specifications including a class C-1 prefabricated module 303, a class C-2 prefabricated module 304 and a class D prefabricated module 305. The A-type prefabricated module 301 is located at four corners of the well wall 1, the cross section of the A-type prefabricated module is L-shaped integrally and is provided with a transverse end 3011, a vertical end 3012 and an angle end 3013, wherein the distance between the transverse end 3011 and the angle end 3013 is 6m, the distance between the vertical end 3012 and the angle end 3013 is 3.5m, and the overall thickness is 2.6m. The transverse end 3011 and the vertical end 3012 of the class-A prefabricated module 301 are connected to the class-B prefabricated module 302, the section of the class-B prefabricated module 302 is rectangular as a whole, the length is 9m, the thickness is 2.6m, seven class-B prefabricated modules 302 are connected in series between two adjacent class-A prefabricated modules 301, and a closed rectangular well wall 1 is formed. The cross sections of the C-1 type prefabrication module 303, the C-2 type prefabrication module 304 and the D type prefabrication module 305 are all rectangular. The C-1 type preform module 303 has a length of 9m and a thickness of 2.6m. The C-2 type preform module 304 has a length of 8.5m and a thickness of 2.3m. The class D preform module 305 has a length of 6m and a thickness of 2.7m. Seven C-1 type prefabrication modules 303 are mutually connected in series, and one D type prefabrication module 305 is connected at one end and is used for adjusting the total length, so that a row of continuous transverse walls 21 with uniform thickness are formed, two ends of each transverse wall 21 are perpendicular to the inner wall of the well wall 1, and a gap of 0.4m is formed between each transverse wall 21 and the inner wall of the well wall 1. Five rows of transverse walls 21 with the same structure uniformly divide the interior of the well wall 1 into six rectangular spaces. The C-2 type prefabricated modules 304 are vertically connected to the transverse partition wall 21 to partition the rectangular space, thereby forming the vertical partition wall 22. Five C-2 type prefabricated modules 304 are uniformly divided into six closed rectangular modules in each rectangular space, and a gap of 0.115m is reserved between each C-2 type prefabricated module 304 and the inner wall of the well wall 1. The arrangement of the gaps can reduce the influence of errors in actual operation, enhance fault tolerance, and facilitate the transfer and arrangement of each prefabricated module 3 in a hoisting mode. The C-2 type prefabricated module 304 is connected with the C-1 type prefabricated module 303 and the B type prefabricated module 302 in a lap joint manner through the lap joint reinforcing steel bars 4, and two ends of the transverse wall 21 are connected with the B type prefabricated module 302 in a lap joint manner through the lap joint reinforcing steel bars 4, and the lap joint method is a conventional technology in the art, so that details are not repeated here.

Referring to fig. 2, 4 and 6, the prefabricated module 3 includes a stiff skeleton 314 and a plurality of transverse reinforcing bars 311 and longitudinal reinforcing bars 312 supported by the stiff skeleton 314, and the transverse reinforcing bars 311 and the longitudinal reinforcing bars 312 of the same prefabricated module 3 are arranged flush with each other, so that the outer profile of the prefabricated module 3 has a neat section, and is convenient for assembly and connection. The heights of the transverse steel bars 311 of each prefabricated module 3 in the same sunk well section are the same, and the intervals among the longitudinal steel bars 312 are the same. The prefabricated module 3 further comprises stirrups 313 for fixing the transverse steel bars 311 and the longitudinal steel bars 312, the stirrups 313 are vertically connected to the outer sides of the middle sections of the group of transverse steel bars 311 or the longitudinal steel bars 312, and the stirrups 313 are uniformly distributed, so that the strength of the prefabricated module 3 is improved. The arrangement and connection of the stirrup 313 are conventional in the art, and will not be described in detail.

Referring to fig. 2 and 3, the stiff skeleton 314 of the class d prefabricated module 305 (see fig. 1) includes cross frames 315, longitudinal frames 316, connecting frames 317, and reinforcing frames 318. The stiff skeleton 314 of the class D prefabricated module 305 (see fig. 1) includes two sets of structurally identical cross frames 315 and longitudinal frames 316. The group of cross frames 315 and vertical frames 316 includes three cross frames 315 and three vertical frames 316. Wherein, three crossbearers 315 are straight structure, and the level sets up, and the difference in height just the interval is equal flushes each other. The three longitudinal frames 316 are vertically arranged and respectively connected to the center of the transverse frame 315 and the positions near the two ends, the distance between the adjacent longitudinal frames 316 is equal, and each longitudinal frame 316 is connected with the three transverse frames 315. The junction of the vertical frame 316 and the top cross frame 315 is near the top of the vertical frame 316, and the junction of the vertical frame 316 and the bottom cross frame 315 is at a greater distance from the bottom of the vertical frame 316, near the distance between adjacent cross frames 315. Both ends of the transverse frame 315 and the longitudinal frame 316 are free ends without connection, which facilitates connection between the stiff skeletons 314. The top ends of the longitudinal frames 316 connected to the cross frames 315 near both ends are provided with circular hanging holes 3161 for hanging the stiff frames 314. The two groups of transverse frames 315 and the longitudinal frames 316 are connected through nine connecting frames 317, the connecting frames 317 are horizontally arranged, two ends of each connecting frame 317 are connected to the connecting positions of the transverse frames 315 and the longitudinal frames 316, and the connecting frames are perpendicular to the transverse frames 315 and the longitudinal frames 316. Two longitudinal frames 316 and three connecting frames 317 which are connected between the two longitudinal frames and correspond to each other in different groups form two adjacent rectangular frames, and diagonal points of the reinforcing frames 318 connected with the rectangular frames are arranged in an X-shaped mode. In this embodiment, the transverse frame 315, the longitudinal frame 316, the connecting frame 317 and the reinforcing frame 318 are all angle steels, wherein the angle steels of the longitudinal frame 316 have dimensions of 70mm×70mm×6mm, and the angle steels of the transverse frame 315, the connecting frame 317 and the reinforcing frame 318 have dimensions of 50mm×50mm×6mm. In this embodiment, the transverse frame 315 is not a continuous angle steel, but two angle steel are fixedly connected to corresponding positions on two sides of the longitudinal frame 316, so as to form a straight transverse frame 315. Similarly, in some embodiments, the longitudinal frame 316 is not a continuous angle, but two angle steel are fixedly connected to corresponding positions on two sides of the transverse frame 315, so as to form a straight longitudinal frame 316.

Referring to fig. 2 and 4, the stiffness skeleton 314 of the B-type prefabricated module 302 (see fig. 1) is different from the stiffness skeleton 314 of the D-type prefabricated module 305 (see fig. 1) in that the stiffness skeleton 314 of the B-type prefabricated module 302 includes four groups of transverse frames 315 and longitudinal frames 316, wherein the four groups of transverse frames 315 and longitudinal frames 316 are divided into two large groups, the two groups of transverse frames 315 and longitudinal frames 316 in the large groups are closer in distance, the tops are connected with each other and provided with a lifting hole 3161, the large groups are farther in distance, and the whole body is in a symmetrical structure.

Referring to fig. 2, 4 and 5, the stiffness frame 314 of the type a prefabricated module 301 (see fig. 1) is different from the stiffness frame 314 of the type B prefabricated module 302 (see fig. 1) in that the transverse frame 315 has a right-angle structure, is in an "L" shape, and includes a long side 3151, a short side 3152 and an angular point 3153, and is formed by two mutually perpendicular angle steels. The four sets of cross frames 315 are sized differently but are arranged flush such that the transverse end 3011 and the vertical end 3012 of the class a pre-cast module 301 are flush fractures perpendicular to the borehole wall 1. The long side 3151 and short side 3152 of the cross frame 315 of the stiff frame 314 of the class a precast module 301 correspond to the cross frame 315 of the class B precast module 302. The stiffness skeleton 314 of the class a preform module 301 includes three rows of connector frames 317, each row of connector frames 317 including five sections, each connected vertically to both the cross frames 315 and the longitudinal frames 316. Two of the two positions are respectively connected to the long side 3151 and the short side 3152 of the transverse frame 315 near the free end, one end of the two positions is connected to the right angle of the inner transverse frame 315, the other end of the two positions is connected to the long side 3151 and the short side 3152 of the outer transverse frame 315, and the last position is connected to the middle of the long side 3151 of the transverse frame 315.

The structure of the stiff skeleton 314 of the C-1 and C-2 class preform modules 304 is similar to that of the stiff skeleton 314 of the D class preform module 305, with only the length dimensions being different and not described in detail herein.

Referring to fig. 6, 7 and 8, the angle steel of the transverse frame 315 is disposed in a direction that the angle side is vertically upward, and two angle steel are welded and connected to corresponding positions on two sides of one angle side of the longitudinal frame 316, so as to form a flat transverse frame 315. The edges of the angle edges in the horizontal direction of the transverse frame 315 are flush with the edges of the angle edges of the longitudinal frame 316, and the directions of the other angle edges of the angle steel of the longitudinal frame 316 in the embodiment are different, so that no special design exists. The transverse reinforcing bars 311 are vertically connected to the outside of the longitudinal frames 316 in a spot-welded manner, parallel to the transverse frames 315, and the longitudinal reinforcing bars 312 are vertically connected to the outside of the transverse frames 315 in a spot-welded manner, parallel to the longitudinal frames 316. In this way, the joint stress of the transverse steel bars 311 and the longitudinal steel bars 312 and the stiffness framework 314 is realized, so that the transverse steel bars 311 and the longitudinal steel bars 312 can play a role in reinforcing in multiple directions, and the rigidity of the prefabricated module 3 is enhanced. The spot welding connection can realize great joint strength with less connecting area, helps improving the holistic intensity of reinforcement cage. Referring to fig. 4, 5 and 8, in this embodiment, the longitudinal bars 312 have a cross-sectional diameter of 20mm, are uniformly arranged on the transverse frames 315, and can be disposed between the slits of the transverse frames 315 and the longitudinal frames 316, so as to facilitate the arrangement of the longitudinal bars 312. The cross section diameters of the transverse bars 311 at different positions are different, but the heights are the same, and the transverse bars are uniformly distributed on the transverse frames 315. The cross-sectional diameter of the transverse bars 311 of the transverse frame 315 connected to the outer sides of the stiffness skeletons 314 of the class a and B pre-modules 301 (see fig. 1) and 302 (see fig. 1) is 36mm, the cross-sectional diameter of the transverse bars 311 of the longitudinal frame 316 connected to the inner sides of the stiffness skeletons 314 of the class a and B pre-modules 301 (see fig. 1) and 302 (see fig. 1) is 32mm, the cross-sectional diameter of the transverse bars 311 of the longitudinal frame 316 connected to the stiffness skeletons 314 of the class C-1 and 2 pre-modules 303 (see fig. 1) and 304 (see fig. 1) is 25mm, and the cross-sectional diameter of the stirrups 313 is 16mm.

Referring to fig. 1, 4 and 5, the transverse reinforcing bars 311 of the type a prefabrication module 301 are in one-to-one correspondence with the positions of the transverse reinforcing bars 311 of the type B prefabrication module 302, and are connected through transverse connectors. The positions of the transverse reinforcing bars 311 of the adjacent B-type prefabricated modules 302 are in one-to-one correspondence and are connected through transverse connectors. The positions of the transverse reinforcing bars 311 of adjacent C-1 type prefabricated modules 303 are in one-to-one correspondence and are connected through transverse connectors. The transverse reinforcing bars 311 of the class-D prefabricated module 305 are in one-to-one correspondence with the positions of the transverse reinforcing bars 311 of the class-C-1 prefabricated module 303, and are connected through transverse connectors. In this embodiment, the transverse joint is a straight threaded sleeve of the primary joint, and the connection mode is full-section connection. The stiff backbones 314 in the same open caisson section in this embodiment are not connected, but in other embodiments may be connected by welding or the like.

As shown in fig. 2 and 4, the modular open caisson reinforcement cage further includes reinforcing ribs 319, wherein the reinforcing ribs 319 are disposed on each layer of open caisson sections, and the reinforcing ribs 319 of the bottom layer open caisson sections in this embodiment are horizontally connected above the connecting frame 317 of the stiff frame 314 of the prefabricated module 3 and are parallel to the transverse reinforcing steel bars 311. The layer of reinforcing bars 319 are connected to the connecting frame 317 in the same manner as the longitudinal bars 312 (see fig. 6) are connected to the cross frame 315. Stirrups 313 are arranged on the longitudinal bars 312 (see fig. 6) at positions higher than the connecting frames 317, and another row of transverse reinforcing bars are fixedly connected above the stirrups 313 above the connecting frames 317, so that a double-layer reinforcing bar 319 is formed above the stiff skeleton 314. The height and arrangement rule of the double-layer reinforcing ribs 319 are the same as those of the transverse reinforcing steel bars 311, and the cross-sectional diameters of the reinforcing ribs 319 arranged at the top of the prefabricated module 3 through the connecting frame 317 and the stirrups 313 in the embodiment are 25mm.

In this embodiment, the reinforcing rib 319 is not included in the prefabricated module 3, and after the bottom open caisson section is built, the reinforcing rib 319 is manually connected to the bottom open caisson section, and then the second open caisson section is built and connected, so that the manufacturing difficulty of the prefabricated module 3 is reduced. In some embodiments, the reinforcing bars 319 are connected at the prefabrication stage, i.e. become part of the prefabrication module 3, and the manufacturing process of such prefabrication module 3 is difficult, but is advantageous for improving the efficiency of the construction.

In this embodiment, the distribution of the prefabricated modules 3 of each open caisson section is similar, that is, the prefabricated modules 3 of the lower layer in the adjacent open caisson sections are in one-to-one correspondence with the prefabricated modules 3 of the upper layer, and the positions of the longitudinal steel bars 312 of the lower layer are corresponding to the positions of the longitudinal steel bars 312 of the upper layer. The stiffness skeleton 314 of the lower prefabricated module 3 in the adjacent open caisson section is connected with the stiffness skeleton 314 of the upper prefabricated module 3 by welding, and the longitudinal steel bars 312 of the lower prefabricated module 3 in the adjacent open caisson section are connected with the longitudinal steel bars 312 of the upper prefabricated module 3 by longitudinal joints in full section, in this embodiment, the longitudinal joints are lap joints, and the minimum lap joint length is calculated according to the length of the longitudinal steel bars 312 and the current industry standard. In some embodiments, the prefabricated modules 3 of each layer of open caisson sections are arranged in a staggered manner, i.e. the prefabricated modules 3 of the lower layer in the adjacent open caisson sections do not correspond to the prefabricated modules 3 of the upper layer, and this structure helps to strengthen the overall strength.

In this embodiment, the prefabricated modules 3 of the second and third open caisson sections are different from the prefabricated modules 3 of the bottom open caisson section only in that each group of transverse frames 315 and longitudinal frames 316 only includes two transverse frames 315, the distance between them is reduced, and the other structures are similar, and the number of the prefabricated modules is adaptively changed only according to the number of the transverse frames 315. After the second layer and the third layer of open caisson sections are built, the reinforcing ribs 319 are connected to the bottom of each stiff framework 314 through stirrups 313 at the same height as the transverse reinforcing steel bars 311, and two rows of reinforcing ribs are arranged in total, and the diameters of the sections of the reinforcing ribs 319 arranged at the bottom of the prefabricated module 3 through the stirrups 313 in the embodiment are 12mm.

The prefabricated module 3 of the fourth and fifth layer open caisson sections differs from the prefabricated module 3 of the second layer open caisson section only in that the distance between only two cross frames 315 included in each set of cross frames 315 and longitudinal frames 316 is increased. After the fourth and fifth open caisson sections are built, two rows of reinforcing ribs 319 are respectively arranged at the top and bottom of the prefabricated module 3.

The prefabricated modules 3 of the sixth and seventh open caisson sections are different from the prefabricated modules 3 of the fourth open caisson section only in that the distance between each group of transverse frames 315 and the longitudinal frames 316, which only comprise two transverse frames 315, is increased, and the length of the position where the lifting hole 3161 is formed at the top end of the longitudinal frame 316 is reduced. After the sixth layer and the seventh layer of open caisson sections are built, a row of reinforcing ribs 319 are respectively arranged at the top and the bottom of the prefabricated module 3.

The prefabricated module 3 of the eighth and ninth open caisson sections differs from the prefabricated module 3 of the sixth open caisson section only in that the distance between only two cross frames 315 included in each set of cross frames 315 and longitudinal frames 316 becomes smaller. After the eighth layer and the ninth layer of open caisson sections are built, a row of reinforcing ribs 319 are respectively arranged at the top and the bottom of the prefabricated module 3.

The prefabricated module 3 of the tenth-layer open caisson node differs from the prefabricated module 3 of the eighth-layer open caisson node only in that the distance between only two crossbeams 315 included in each set of crossbeams 315 and longitudinal frames 316 becomes smaller. After the tenth open caisson section is built, a row of reinforcing ribs 319 are respectively arranged at the top and the bottom of the prefabricated module 3.

The arrangement mode of the reinforcing ribs 319 depends on the design scheme of the open caisson, in this embodiment, only the positions and the number of layers are different, and the specific connection modes are the same, which will not be described here again, and in other embodiments, the structure of each prefabricated module 3 and the arrangement of the reinforcing ribs 319 are adjusted according to the structural design of the open caisson.

As shown in fig. 9, the construction method of the open caisson comprising the modular open caisson reinforcement cage is as follows:

s1, building a stiff framework 314 according to the structures of the stiff frameworks 314 with different specifications, and regularly arranging and spot-welding transverse steel bars 311 and longitudinal steel bars 312 on the stiff framework 314 by a jig method to form a plurality of prefabricated modules 3 with different specifications. The jig method is prior art in the art and will not be described in detail herein. Because the type a prefabricated module 301 is relatively complex in structure, in some embodiments, the type a prefabricated module 301 is manufactured by a manual construction method.

S2, arranging and fixing the prefabricated modules 3 with different specifications at preset installation positions in a hoisting mode, connecting the transverse reinforcing steel bars 311 of the adjacent prefabricated modules 3 by using a first-stage sleeve joint to form a sunk well section of the bottom layer, and connecting reinforcing ribs 319 above the sunk well section of the bottom layer.

S3, repeating the step S2 to form a second-layer open caisson section above the bottom-layer open caisson section, connecting the bottom-layer open caisson section with a stiffness framework 314 of a prefabricated module 3 of the second-layer open caisson section through welding, and connecting the bottom-layer open caisson section with a longitudinal steel bar 312 of the prefabricated module 3 of the second-layer open caisson section through a primary lap joint.

S410, repeating the step S3 to construct and connect the third-layer open caisson node, pouring the bottom layer into the third-layer open caisson node by concrete, exposing the top of the stiffness framework 314 of the third-layer open caisson node and the top of the longitudinal steel bars 312 to form a bottom open caisson, and sinking the bottom open caisson.

S420, repeating the step S3 to build and connect the fourth layer, the fifth layer, the sixth layer and the seventh layer of open caisson sections, pouring and sinking again, repeating the step S3 to build and connect the eighth layer, the ninth layer and the tenth layer of open caisson sections again, and pouring all parts of the open caisson to form the multilayer open caisson.

The second embodiment is another structure of the modular open caisson reinforcement cage and the method for constructing the open caisson comprising the modular open caisson reinforcement cage.

The difference between the embodiment and the modularized open caisson reinforcement cage in the first embodiment is that: the prefabricated modules 3 of the same open caisson section are not identical in height, namely the connecting parts of adjacent open caisson sections are uneven folding lines, transverse steel bars 311 of the adjacent prefabricated modules 3 which are positioned in different open caisson sections but are horizontally connected through transverse connectors, and the design is beneficial to improving the structural rigidity and strength of the modularized open caisson steel bar framework.

The difference between the present embodiment and the method for constructing the open caisson in the first embodiment is that: and uniformly pouring and sinking after all the open caisson modularized open caisson steel reinforcement frameworks are built.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.

Claims (10)

1. A modular open caisson rebar framework, comprising:

a prefabricated module (3) comprising a stiff framework (314), a plurality of transverse steel bars (311) and longitudinal steel bars (312) supported on the stiff framework (314) and stirrups (313), wherein the ends of the transverse steel bars (311) are mutually flush, the ends of the longitudinal steel bars (312) are mutually flush, and the stiff framework (314) above is rigidly connected with the stiff framework (314) below;

the transverse connectors are used for connecting the transverse steel bars (311) corresponding to the positions of the adjacent prefabricated modules (3);

and the longitudinal joint is used for connecting the longitudinal steel bars (312) which are adjacent to the prefabricated modules (3) and correspond to the prefabricated modules in position.

2. A modular open caisson reinforcement cage according to claim 1, characterized in that the transverse reinforcement (311) and the longitudinal reinforcement (312) are both rigidly connected to the stiff skeleton (314).

3.A modular open caisson reinforcement cage as claimed in claim 2, characterized in that the transverse reinforcement (311) and the longitudinal reinforcement (312) are each connected to the stiff skeleton (314) by spot welding.

4. A modular open caisson reinforcement cage according to claim 1, characterized in that the lateral joint is configured to be chosen as a primary mechanical connection joint when the diameter of the lateral reinforcement (311) is any one of 25-36 mm, and as a lap joint when the diameter of the lateral reinforcement (311) is any one of 16mm or more and less than 25 mm; the longitudinal joint is configured to be selected as a primary mechanical connection joint when the diameter of the longitudinal bar (312) is any one of 25mm to 36mm, and to be selected as a lap joint when the diameter of the longitudinal bar (312) is any one of 16mm or more and less than 25mm.

5. A modular open caisson reinforcement cage as claimed in any one of claims 1-4, characterized in that said prefabricated modules (3) arranged at the same level are interconnected to form a layer of open caisson sections, said prefabricated modules (3) in the same open caisson section being of the same level.

6. A modular open caisson reinforcement cage according to claim 5, characterized in that the same open caisson section comprises a plurality of prefabricated modules (3) of different structures.

7. A modular open caisson reinforcement cage according to any one of claims 1-4, further comprising a reinforcement (319), which reinforcement (319) is laid by a man-made site.

8. A method of constructing an open caisson comprising a modular open caisson reinforcement cage according to any one of claims 1-7, comprising:

s1, connecting the transverse steel bars (311) and the longitudinal steel bars (312) to preset positions of the stiff framework (314), and connecting the stirrups (313) to form a prefabricated module (3);

s2, arranging and fixing a plurality of prefabricated modules (3) at preset installation positions in a hoisting mode, and connecting the transverse joints with the transverse steel bars (311) of the adjacent prefabricated modules (3) to form a single-layer open caisson section;

s3, repeating the step S2 to form an upper open caisson section above the lower open caisson section, rigidly connecting the lower open caisson section with the stiffness framework (314) of the prefabricated module (3) of the upper open caisson section, and connecting the lower open caisson section with the longitudinal steel bars (312) of the prefabricated module (3) of the upper open caisson section through the longitudinal connectors;

s4, stacking and fixing a plurality of layers of open caisson sections, and pouring concrete for a plurality of times to form the multilayer open caisson.

9. The method for constructing an open caisson according to claim 8, wherein the stacking and fixing a plurality of the open caisson sections in step S4 and pouring concrete several times to form a multi-layer open caisson comprises:

s401, stacking and connecting a plurality of layers of open caisson sections to form a multi-section open caisson framework;

s402, pouring concrete into the multi-section open caisson skeleton to form a multi-layer open caisson.

10. The method for constructing an open caisson according to claim 8, wherein the stacking and fixing a plurality of the open caisson sections in step S4 and pouring concrete several times to form a multi-layer open caisson comprises:

s410, stacking and fixing a plurality of layers of open caisson sections, and then pouring the partially fixed open caisson sections with concrete to expose the top of the stiff framework (314) and the top of the longitudinal steel bars (312) of the top-layer open caisson section to form a bottom open caisson;

and S420, continuously stacking and fixedly connecting a plurality of layers of open caisson sections above the bottom open caisson, repeating the steps for a plurality of times until the total height reaches a preset height, and pouring the top layers of open caisson sections to form the multilayer open caisson.