Combined open caisson wall structure

Abstract

The utility model discloses a combined open caisson wall structure. The structure is formed by combining a concrete section and a steel structure section, a groove is formed in the top face of the concrete section to assemble the steel structure section, and the steel structure section is composed of three-level steel bars, arc-shaped steel plates, H-shaped steel and other components. Through the design of the well wall structure, the construction process is simplified, the construction period is remarkably shortened, the field operation amount is reduced, and the material cost is reduced. The combined open caisson wall structure is efficient, economical, environmentally friendly and suitable for underground engineering such as municipal pipelines, and has wide application and popularization value.

Description

Technical Field

[0001] The utility model relates to the technical field of caisson construction, in particular to a combined caisson wall structure. Background Art

[0002] With the increasing demand for underground space in urban construction, especially in municipal pipeline projects, how to use underground space efficiently, economically and environmentally friendly has become an urgent problem to be solved. Caisson construction method has been widely used in underground engineering construction due to its advantages such as high rigidity, short construction period, relatively low cost and the enclosure structure can be used for other purposes. However, traditional reinforced concrete caisson still faces many challenges and shortcomings in practical applications, and urgently needs technological innovation and optimization.

[0003] First, there is a significant waste of materials in the traditional reinforced concrete caisson. In order to achieve the required buried depth of the pipeline, the caisson often needs to be built deeper, and its cross-section design usually includes a wider lower enclosure structure that also serves as a maintenance well, and a narrower upper passage. Since the upper passage needs to be cast additionally, the existing strength and rigidity of the caisson enclosure structure cannot be fully utilized, resulting in a large amount of reinforced concrete materials being wasted. This design not only increases construction costs, but also violates the concept of green building and sustainable development.

[0004] Secondly, the long construction period is another major drawback of traditional reinforced concrete caissons. During the construction process, as the excavation and sinking progress, a series of tedious processes such as steel bar binding, formwork installation, concrete pouring, maintenance and formwork removal need to be carried out section by section. This series of processes is not only time-consuming, but also has a long-term impact on the surrounding environment, which is not conducive to the overall control of the project progress and the realization of environmentally friendly construction. Especially when caisson construction is carried out on urban main roads with heavy traffic and complex construction environment or on roads without excavation working surfaces, the traditional method of making caissons in sections is even more difficult to meet the requirements of fast and efficient construction.

[0005] In summary, traditional reinforced concrete caissons have obvious deficiencies in terms of material usage and construction cycle, and these problems need to be overcome through technological innovation and optimized design. Utility Model Content

[0006] In view of the working needs and existing problems in the above-mentioned background technology, the present invention has made reflections and innovations thereon, with the aim of providing a combined caisson wall structure for fast and efficient caisson construction.

[0007] In order to solve the above problems and achieve the above purposes, the utility model adopts the following technical solutions:

[0008] A combined caisson wall structure, comprising:

[0009] A concrete segment (1), wherein the top surface of the concrete segment (1) is provided with grooves (3) evenly distributed along the center line of the circular arc;

[0010] A steel structure segment (2) is mounted on the groove (3), comprising:

[0011] A plurality of third-level steel bars (4) are pre-buried in the groove (3);

[0012] An expansion rubber water stop strip (5), wherein the expansion rubber water stop strip (5) has a plurality of strips and is placed in the groove (3);

[0013] The arc-shaped steel plate (6) is an arc-shaped structure, with two bolt holes at each of the left and right ends, and two groups of eight bolt holes evenly distributed at the bottom;

[0014] H-shaped steel (7), wherein two grooves of the H-shaped steel (7) are provided with expansion rubber water stop strips (5), and one end of two adjacent arc-shaped steel plates (6) is placed in the two grooves of the H-shaped steel (7) for limiting.

[0015] As a preferred embodiment of the utility model, the steel structure segment (2) also includes an adjustable steel plate strip (9), which is a rectangular structure as a whole, with a bolt hole at one end, the shape of the bolt hole corresponds one-to-one to the bolt holes at the left and right ends of the arc-shaped steel plate (6), and a waist-shaped hole at the other end.

[0016] As a preferred embodiment of the utility model, the steel structure segment (2) further includes a steel plate gasket (10), which is a rectangular structure as a whole and has a bolt hole, the shape of which corresponds one-to-one to the bolt holes at the left and right ends of the arc-shaped steel plate (6).

[0017] As a preferred embodiment of the utility model, the steel structure segment (2) also includes high-strength bolts (8), which pass through the bolt holes or waist-shaped holes on the adjustable steel plate strip (9), the steel plate gasket (10), and the bolt holes on the arc-shaped steel plate (6) in sequence, so that the arc-shaped steel plate (6) is detachably connected to the adjustable steel plate strip (9).

[0018] As a preferred embodiment of the utility model, the steel structure segment (2) further comprises a U-shaped bolt (11), and the U-shaped bolt (11) is a "U"-shaped structure as a whole. The arc-shaped structure of the U-shaped bolt (11) is inserted into the third-grade steel bar (4) to fit, and the straight end is fixed through the bolt hole at the bottom of the arc-shaped steel plate (6).

[0019] As a preferred solution of the utility model, all gaps in the steel structure segment (2) are prevented from seepage by using expansion rubber water stop strips (5).

[0020] The working principle of the utility model is: through the design of the shaft wall structure of the combination of concrete segments and steel structure segments, each component of the steel structure segment can be prefabricated and processed in the factory, and only needs to be assembled and connected on site, which greatly reduces the tedious processes such as on-site steel bar binding, template installation, concrete pouring, and demolding, and significantly shortens the construction period. In actual construction, after reaching the design elevation of the caisson, if there are any remaining steel structure segments extending out, they can be disassembled and reused, saving material costs. The sealing effect of the expansion rubber water stop ensures the overall waterproof performance of the caisson structure.

[0021] Beneficial effects of the utility model:

[0022] 1. This utility model improves construction efficiency: through the combined design of concrete segments and steel structure segments, the various components of the steel structure segments can be prefabricated in the factory, and only simple assembly and connection work is required on site. This innovative design greatly reduces the traditional cumbersome processes such as on-site steel bar binding, formwork installation, concrete pouring, and formwork removal, thereby significantly shortening the construction period and improving construction efficiency.

[0023] 2. The utility model reduces material costs: In the structural design, the combination of steel structure segments and concrete segments reduces the amount of concrete used. In addition, when the caisson reaches the design elevation, if there are remaining steel structure segments extending out, these components can be easily disassembled and reused, further reducing material costs and complying with the concept of green building and sustainable development.

[0024] 3. The utility model has excellent waterproof performance: the expansion rubber water stop strips are used for sealing at each connection point of the steel structure segment, especially the grooves, slots and bolt connections. This design ensures the overall waterproof performance of the caisson structure and effectively prevents the influence of groundwater penetration on the stability and service life of the structure.

[0025] 4. The utility model has strong structural stability: through the close combination of steel structure segments and concrete segments, as well as the pre-embedded tertiary steel bars and the fixing effect of U-bolts, a stable and reliable shaft wall structure is formed together, and the high-strength characteristics of the steel structure ensure the stability of the overall structure. This structural design not only improves the bearing capacity of the caisson, but also enhances its anti-deformation performance, ensuring the safety and stability of underground projects. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a front elevation view of the utility model;

[0027] Figure 2 It is the AA cross-sectional view of the utility model;

[0028] Figure 3 It is the BB cross-sectional view of the utility model;

[0029] Figure 4 It is a CC cross-sectional view of the utility model;

[0030] Figure 5 It is a schematic diagram of the three-dimensional structure of the curved steel plate;

[0031] Figure 6 This is the structural diagram of the connected elevation of the curved steel plate;

[0032] Figure 7 This is the connection plane structural diagram of the curved steel plate;

[0033] Figure 8 It is a schematic diagram of the structure of the adjustable steel slats;

[0034] Fig. 9 It is a structural schematic diagram of a steel plate gasket;

[0035] Fig.10 It is a structural schematic diagram of H-beam;

[0036] Fig.11 It is a structural schematic diagram of a high-strength bolt;

[0037] Fig.12 It is a schematic diagram of the structure of a U-bolt.

[0038] Among them, the numbers in the figure are: 1-concrete segment, 2-steel structure segment, 3-groove, 4-third-grade steel bar, 5-expansion rubber water stop strip, 6-arc steel plate, 7-H-shaped steel, 8-high-strength bolt, 9-adjustable steel plate strip, 10-steel plate gasket, 11-U-bolt. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solutions and advantages of the utility model patent more clear, the utility model patent is further described in detail with reference to the accompanying drawings and specific embodiments; it should be understood that these descriptions are only exemplary and are not intended to limit the scope of the utility model patent; in addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the utility model patent.

[0040] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] like Figure 1 — Figure 6 A combined caisson wall structure is shown, which comprises:

[0042] A concrete segment 1, wherein the top surface of the concrete segment 1 has grooves 3 evenly distributed along the arc center line;

[0043] The steel structure segment 2 is mounted on the groove 3 and comprises:

[0044] A plurality of third-level steel bars 4 are pre-buried in the groove 3;

[0045] An expansion rubber water stop strip 5, wherein the expansion rubber water stop strip 5 has a plurality of strips and is placed in the groove 3;

[0046] The arc-shaped steel plate 6 is an arc-shaped structure, with two bolt holes at each of the left and right ends, and two groups of eight bolt holes evenly distributed at the bottom;

[0047] H-shaped steel 7, wherein two grooves of the H-shaped steel 7 are provided with expansion rubber water stop strips 5, and one end of two adjacent arc-shaped steel plates 6 is placed in the two grooves of the H-shaped steel 7 for limiting.

[0048] Further, such as Figure 8 As shown, the steel structure segment 2 also includes an adjustable steel strip 9, which is a rectangular structure as a whole, has a bolt hole at one end, the shape of the bolt hole corresponds to the bolt holes at the left and right ends of the arc-shaped steel plate 6, and has a waist-shaped hole at the other end.

[0049] Further, such as Fig. 9 As shown, the steel structure segment 2 also includes a steel plate gasket 10. The steel plate gasket 10 is a rectangular structure as a whole and has a bolt hole. The shape of the bolt hole corresponds to the bolt holes at the left and right ends of the arc-shaped steel plate 6 one by one.

[0050] Further, such as Figure 6 , Figure 7 as well as Fig.11 As shown, the steel structure segment 2 also includes high-strength bolts 8, which pass through the bolt holes or waist-shaped holes on the adjustable steel plate strips 9, the steel plate gaskets 10, and the bolt holes on the arc-shaped steel plate 6 in sequence, so that the arc-shaped steel plate 6 is detachably connected to the adjustable steel plate strips 9.

[0051] Further, such as Figure 1 , Figure 3 , Figure 4 as well as Fig.12 As shown, the steel structure segment 2 also includes a U-shaped bolt 11. The U-shaped bolt 11 is a "U"-shaped structure as a whole. The arc-shaped structure of the U-shaped bolt 11 is inserted into the third-level steel bar 4 and is fixed by passing the straight end through the bolt hole at the bottom of the arc-shaped steel plate 6.

[0052] Specifically, Figure 6 As shown, all the gaps in the steel structure segment 2 are waterproofed with expansion rubber water stop strips 5 .

[0053] In summary, a more specific embodiment of the present invention is:

[0054] First, the arc-shaped steel plate 6 of the steel structure segment 2 is pre-customized in the factory according to the dimensions on the drawing. Each piece is 2200mm wide, 25-30mm thick, and 2-3m high. The width of the last spliced ​​arc-shaped steel plate 6 is adjusted according to the circumference of the caisson, and the arc-shaped steel plate 6 is reserved with bolt holes of 18mm in diameter according to the design requirements.

[0055] At the beginning of construction, the original caisson bottom seal and blade foot form remain unchanged, and a groove 3 with a width of 80mm and a depth of 50mm is reserved on the top surface of the concrete segment 1 along the arc center line. A 700mm long, Φ25 three-level steel bar 4 is embedded in the groove 3. Two three-level steel bars 4 are embedded in each arc steel plate 6, 300mm deep into the concrete. The spacing between the three-level steel bars 4 is 1000mm and 1230mm alternately, and the three-level steel bars 4 are 600mm away from the arc steel plate 6. After the strength of the concrete segment 1 reaches the design requirements, it can be sunk to the predetermined position according to regulations.

[0056] Furthermore, after placing a 15 mm thick expansion rubber waterstop strip 5 in the groove 3 and checking for compliance, the arc-shaped steel plate 6 is hoisted into the groove 3 with the expansion rubber waterstop strip 5. After the first arc-shaped steel plate 6 is placed at the designated position, two M16 U-shaped bolts 11 are used to vertically fix the third-level steel bar 4 and the arc-shaped steel plate 6. Then, the H-shaped steel 7 with the expansion rubber waterstop strip 5 on both sides of the groove 3 is placed as a slot. After checking that the rubber waterstop strip 5 is qualified, the second arc-shaped steel plate 6 is hoisted. The two arc-shaped steel plates 6 are tightly placed in the H-shaped steel 7 slot. The two arc-shaped steel plates 6 are horizontally connected using two horizontal bolts.

[0057] Furthermore, two adjacent curved steel plates 6 are horizontally connected by two 300mmX100mmX10mm adjustable steel strips 9, and the gap between the adjustable steel strips 9 and the curved steel plates 6 is filled with 100mmX100mmX18mm steel plate gaskets 10, and then M16 high-strength bolts 8 are used to pass through the adjustable steel strips 9, steel plate gaskets 10, and curved steel plates 6 in sequence to connect and fix; then all the curved steel plates 6 are connected and fixed.

[0058] Specifically, the curved steel plate 6 should be installed from the middle to both sides, and the installation accuracy should be checked in time to prevent the interface gap of the last curved steel plate 6 from being too large or too small, which is not conducive to waterproofing. During the installation of the curved steel plate 6, attention should be paid to uneven settlement, which can be corrected by counterweight or sinking soil to control the sinking quality.

[0059] Furthermore, the construction is repeated according to the combined caisson wall structure until the caisson design elevation is reached. If there are any remaining steel structure segments extending out, they can be disassembled and reused.

[0060] Finally, it should be understood that the above specific embodiments of the present invention are only used to illustrate or explain the principles of the present invention, and do not constitute a limitation on the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made without departing from the spirit and scope of the present invention should be included in the scope of protection of the present invention. In addition, the claims attached to the present invention are intended to cover all changes and modifications that fall within the scope and boundaries of the attached claims, or the equivalent forms of such scope and boundaries.

Claims

1. A combined caisson wall structure, characterized in that: It includes: A concrete segment (1), wherein the top surface of the concrete segment (1) is provided with grooves (3) evenly distributed along the center line of the circular arc; A steel structure segment (2) is mounted on the groove (3), comprising: A plurality of third-level steel bars (4) are pre-buried in the groove (3); An expansion rubber water stop strip (5), wherein the expansion rubber water stop strip (5) has a plurality of strips and is placed in the groove (3); The arc-shaped steel plate (6) is an arc-shaped structure, with two bolt holes at each of the left and right ends, and two groups of eight bolt holes evenly distributed at the bottom; H-shaped steel (7), wherein two grooves of the H-shaped steel (7) are provided with expansion rubber water stop strips (5), and one end of two adjacent arc-shaped steel plates (6) is placed in the two grooves of the H-shaped steel (7) for limiting.

2. A combined caisson wall structure according to claim 1, characterized in that: The steel structure segment (2) also includes an adjustable steel plate strip (9), which is a rectangular structure as a whole, has a bolt hole at one end, the shape of the bolt hole corresponds to the bolt holes at the left and right ends of the arc-shaped steel plate (6), and has a waist-shaped hole at the other end.

3. The combined caisson wall structure according to claim 1, characterized in that: The steel structure segment (2) also includes a steel plate gasket (10), which is a rectangular structure as a whole and has a bolt hole, the shape of which corresponds one-to-one to the bolt holes at the left and right ends of the arc-shaped steel plate (6).

4. The combined caisson wall structure according to claim 1, characterized in that: The steel structure segment (2) also includes high-strength bolts (8), which pass through the bolt holes or waist-shaped holes on the adjustable steel plate strip (9), the steel plate gasket (10), and the bolt holes on the arc-shaped steel plate (6) in sequence, so that the arc-shaped steel plate (6) and the adjustable steel plate strip (9) are detachably connected.

5. The combined caisson wall structure according to claim 1, characterized in that: The steel structure segment (2) also includes a U-shaped bolt (11), which is a "U"-shaped structure as a whole. The arc-shaped structure of the U-shaped bolt (11) is inserted into the third-level steel bar (4) and fits it, and the straight end passes through the bolt hole at the bottom of the arc-shaped steel plate (6) for fixation.

6. The combined caisson wall structure according to claim 1, characterized in that: All gaps in the steel structure segment (2) are sealed with expansion rubber water stop strips (5) to prevent seepage.

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