T-shaped joint box for underground diaphragm wall

Abstract

The utility model discloses a T-shaped joint box for an underground diaphragm wall, which comprises a rear box body, an upper box body and a lower box body, the section of the front box body is cuboid, the front box body is arranged on the front side of the rear box body, and the rear box body and the front box body are matched to form a T-shaped section; the two groups of plate-shaped joints are arranged at the tops of the rear box body and the front box body, and connecting holes are formed in the plate-shaped joints; each of the rear box body and the front box body is formed by welding four groups of steel plates, and stiffened plates are welded in the rear box body and the front box body. The joint box is designed to be of the T-shaped structure, the cuboid isolation plate formed by splicing the four steel plates and reinforcing the stiffened plates is adopted, the rigidity and stability of the structure are remarkably enhanced, deformation of the isolation plate is reduced, repeated utilization of the joint box is achieved, meanwhile, the contact area between the joint box and the underground diaphragm wall is increased, and the construction efficiency is improved. Damage to the wall is effectively avoided, the gravity center distribution of the connector box is effectively changed, and the installation perpendicularity is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of underground continuous wall construction, in particular to an underground continuous wall T-shaped joint box. Background Art

[0002] As an important foundation pit retaining structure and water-cutting curtain technology, underground continuous wall plays a vital role in modern infrastructure construction. Its construction process is roughly as follows: first, a deep trench is excavated at a predetermined location using special machinery, and mud is used to maintain the stability of the trench wall; then a steel cage is placed to enhance the structural strength, and finally concrete is poured through the conduit to form a solid wall unit. This process is repeated until the entire circle of closed continuous wall is built, which can effectively achieve multiple functions such as water cutoff, anti-seepage, and load-bearing.

[0003] In this process, the use of joint boxes (or joint pipes) is particularly critical. It not only helps prevent concrete leakage during pouring, but also provides necessary support for the ground-connected wall steel joints during continuous wall concrete pouring. However, the pulling out of the joint box will be affected by the friction of the groove wall, the adhesion of concrete and its own weight, making it difficult to pull out. At the same time, the joint box (or joint pipe) of conventional projects is relatively small in length and volume, and the form is relatively common. In previous projects, a pipe pulling machine was often used for pulling out.

[0004] Therefore, the use of a special pulling device, such as a pipe pulling machine, is an important measure to ensure the smooth removal of the joint box and to ensure construction efficiency and quality. The patent application number CN202321918806.X in the prior art discloses a rigid joint ground-wall joint box and a pulling device, which realizes the combination of different joint boxes through a plug, a support frame and a connecting flange. It has a simple structure and higher strength after connection, thereby increasing the service life of the joint box, having low manufacturing cost and being easy to use.

[0005] However, the joint box disclosed in the existing patent still has the following deficiencies in actual use: (1) The isolation plate is only a piece of steel plate with low rigidity, and is easily deformed and unusable after repeated use; (2) It is subject to large lateral pressure from concrete during the pouring process and is prone to plastic deformation; (3) It is easy to tilt during the lowering process, resulting in verticality that cannot meet the design requirements; (4) During the construction process, the isolation plate is easy to cut the ground-connected wall groove section, affecting the construction quality.

[0006] To this end, the present application specifically proposes an underground continuous wall T-joint box to solve the above technical problems. Utility Model Content

[0007] The main purpose of the utility model is to provide an underground continuous wall T-type joint box to solve the above technical problems.

[0008] In order to solve the above technical problems, the utility model provides an underground continuous wall T-joint box, comprising:

[0009] The rear box body has a cross section set to be a rectangular parallelepiped;

[0010] A front box body, which has a rectangular cross section and is arranged at the front side of the rear box body, wherein the rear box body cooperates with the front box body to form a T-shaped cross section;

[0011] Two sets of plate-shaped joints are arranged on the top of the rear box body and the front box body, and the plate-shaped joints are provided with connection holes;

[0012] The rear box body and the front box body are both formed by welding four groups of steel plates, and stiffening plates are welded inside the rear box body and the front box body.

[0013] Furthermore, the side walls at the upper and lower ends of the front box body are provided with mounting holes for connecting with the connecting holes of another junction box through high-strength bolts or fixed cross bars.

[0014] Furthermore, the connection holes are provided in four groups and are symmetrically and evenly arranged on two groups of plate-like joints, and the front box body is tightly fitted with the plate-like joints of the other group of joint boxes.

[0015] Furthermore, the installation holes and the connection holes are arranged at corresponding positions to ensure that the upper and lower sets of junction boxes can be smoothly matched by high-strength bolts or fixed cross bars.

[0016] The beneficial effects of the utility model are embodied in:

[0017] 1. The utility model adopts a rectangular isolation plate structure of a stiffening plate formed by splicing four steel plates in the joint box, which significantly enhances the rigidity and stability of the isolation plate and effectively reduces the degree of deformation during use, thereby realizing multiple reuse of the joint box, greatly improving construction efficiency and reducing costs.

[0018] 2. The utility model increases the contact area with the underground continuous wall groove section by adjusting the isolation plate of the joint box to a rectangular shape composed of four steel plates, effectively disperses the pressure on the butt-jointed wall groove section, avoids unnecessary damage or cutting to the sensitive wall structure, and ensures the overall safety and integrity of the underground structure.

[0019] 3. The utility model can further change the center of gravity distribution of the joint box by changing the joint box structure to a T-shape, thereby ensuring the accurate verticality of the joint box during installation and use. The front box body of the T-shaped joint box can fit tightly against the web of the H-shaped steel joint of the underground continuous wall. When pouring concrete, it can tightly resist the deformation of the H-shaped steel joint of the underground continuous wall, meeting the construction requirements, thereby not only improving the stability of the structure, but also simplifying the construction difficulty, ensuring the high standards and high quality of the underground continuous wall construction, and improving the quality and safety of the overall project. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0021] Figure 1 It is an overall three-dimensional schematic diagram of the utility model;

[0022] Figure 2 It is a plan view of the utility model in use state.

[0023] In the figure:

[0024] 1. Rear box body; 2. Steel plate; 3. Stiffening plate; 4. Front box body; 5. Plate joint; 6. Connection hole; 7. Installation hole. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. In the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0026] In the embodiment, see Figure 1 and Figure 2 .

[0027] like Figure 1 and Figure 2 As shown, the utility model provides an underground continuous wall T-joint box, comprising:

[0028] The rear box body 1 has a rectangular cross section;

[0029] The front box body 4 has a rectangular cross section and is arranged at the front side of the rear box body 1. The rear box body 1 cooperates with the front box body 4 to form a T-shaped cross section;

[0030] Two sets of plate-shaped joints 5 are arranged on the top of the rear box body 1 and the front box body 4 , and connecting holes 6 are opened on the plate-shaped joints 5 .

[0031] Specifically, the joint box adopts a rectangular isolation plate structure formed by splicing four steel plates 2 to form a stiffening plate 3, which can significantly enhance the rigidity and stability of the isolation plate and effectively reduce the degree of deformation during use, thereby realizing multiple reuse of the joint box, greatly improving construction efficiency and reducing costs.

[0032] In addition, by adjusting the joint box isolation plate to a rectangular shape composed of four steel plates 2, the contact area with the underground continuous wall groove section is increased, the pressure on the connecting wall groove section is effectively dispersed, unnecessary damage or cutting to the sensitive wall structure is avoided, and the overall safety and integrity of the underground structure is ensured.

[0033] At the same time, by changing the joint box structure to a T-shape, the center of gravity distribution of the joint box can be further changed, ensuring that the verticality of the joint box is accurate during installation and use. The front box body 4 of the T-shaped joint box can be close to the web of the H-shaped steel joint of the underground continuous wall. When pouring concrete, it can tightly resist the deformation of the H-shaped steel joint of the underground continuous wall, meeting the construction requirements, thereby not only improving the stability of the structure, but also simplifying the construction difficulty, ensuring the high standards and high quality of the underground continuous wall construction, and improving the quality and safety of the overall project.

[0034] In summary, the joint box is designed as a T-shaped structure and a rectangular isolation plate spliced ​​by four steel plates 2 and reinforced with a stiffening plate 3 is used to replace the conventional isolation plate plus a support frame joint box form. The T-shaped joint box has the characteristics of high strength and rigidity, stable center of gravity, and a flat structure on the side of the rear box body 1. It not only significantly enhances the rigidity and stability of the structure, prevents the isolation plate from deforming during the concrete pouring process, and realizes the repeated use of the joint box, but also increases the contact area with the underground continuous wall, avoids the cutting of the ground-connected wall groove wall by the rear box body 1, effectively avoids damage to the wall, and effectively changes the center of gravity distribution of the joint box, ensuring the verticality of the installation, and solving the problem that the verticality does not meet the design requirements due to the unstable center of gravity of the joint box during lifting.

[0035] in:

[0036] The rear box body 1 and the front box body 4 are both formed by welding four sets of steel plates 2, and stiffening plates 3 are welded inside the rear box body 1 and the front box body 4;

[0037] The side walls at the upper and lower ends of the front box body 4 are provided with mounting holes 7 for connecting with the connecting holes 6 of another junction box through high-strength bolts or fixed cross bars.

[0038] Therefore, the specific use of the joint box in actual construction operations includes:

[0039] Step 1: After the steel cage of the ground-connected wall is lowered, the first joint box is hoisted to the lowering position and slowly lowered. When the plate joint 5 is close to the ground elevation, the T-joint box is temporarily fixed to the ground by passing the fixing cross bar through the connecting hole 6;

[0040] Step 2: After the temporary fixation of the T-joint box is completed, lift another T-joint box, align the bottom mounting hole 7 of the joint box with the plate-shaped joint 5 of the temporarily fixed T-joint box, at this time, the connection hole 6 of the bottom T-joint box is coaxially connected with the mounting hole 7 of the upper T-joint box, so that the two T-joint boxes can be connected conveniently by high-strength bolts, and finally, slowly lower the upper T-joint box until the plate-shaped joint 5 of the upper T-joint box is close to the ground elevation, and use the fixing cross bar to pass through the connection hole 6 to temporarily fix the upper T-joint box on the ground;

[0041] Step 3: Repeat the second step until the T-junction boxes connected in series up and down reach the specified position.

[0042] In addition, it should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0043] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or schemes that A and B meet at the same time. In addition, in the embodiments of the utility model, "multiple" refers to more than two. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

Claims

1. An underground continuous wall T-joint box, characterized in that: include: The rear box body (1) has a rectangular parallelepiped cross section; The front box body (4) has a rectangular parallelepiped cross section and is arranged at the front side of the rear box body (1), and the rear box body (1) cooperates with the front box body (4) to form a T-shaped cross section; Two groups of plate-shaped joints (5) are arranged on the top of the rear box body (1) and the front box body (4), and the plate-shaped joints (5) are provided with connection holes (6); The rear box body (1) and the front box body (4) are both formed by welding four groups of steel plates (2), and stiffening plates (3) are welded inside the rear box body (1) and the front box body (4).

2. The underground continuous wall T-joint box according to claim 1, characterized in that: The side walls at the upper and lower ends of the front box body (4) are provided with mounting holes (7) for connecting with the connecting holes (6) of another junction box through high-strength bolts or fixed cross bars.

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