A comb-shaped post-poured strip structure for the junction of adjacent foundation pits

Abstract

The utility model relates to a comb tooth shape post-pouring band structure for the junction of adjacent foundation pits, belongs to the field of building construction technology, in particular to a comb tooth shape post-pouring band structure for the junction of adjacent foundation pits, which comprises a bottom plate and a diaphragm wall, the diaphragm wall is arranged on one side of the bottom plate, a plurality of groups of structural reinforcement one and structural reinforcement two are fixedly installed at equal intervals in the bottom plate, and a pair of stirrups is fixedly installed on each group of structural reinforcement two, the utility model can be more safe and efficient, save construction period and improve quality effect, solve the problem that the post-pouring band part is reserved as a whole by traditional methods, only steel bars are bound, and concrete is not poured temporarily, but if construction is carried out in this way, the diaphragm wall and other enclosure structures between the two adjacent foundation pits lose the support of the bottom plate and leave safety hazards, and if the post-pouring band part is filled with plain concrete, although support can be provided, the amount of chiseling of the plain concrete in the later stage is increased, and the protection of the waterproof coiled material is adversely affected.

Description

Technical Field

[0001] This utility model relates to the field of building construction technology, and in particular to a comb-shaped post-pouring strip structure for the junction of adjacent foundation pits. Background Technology

[0002] As China's urbanization process accelerates, the scale of subway construction continues to expand. However, the design of urban core areas involves many existing structures and complex distribution of various pipelines, which means that the foundation pits for subway construction may be divided into multiple phases. In order to prevent cracks in the concrete base slab, post-pouring strips are generally set at the junction of adjacent foundation pits.

[0003] However, traditional methods often have the following problems when used;

[0004] First, the post-pouring strip is reserved as a whole, and only the steel bars are tied. The concrete is not poured for the time being. However, if the construction is carried out in this way, the retaining structure such as the diaphragm wall between the two adjacent foundation pits will lose the support of the bottom plate, leaving a safety hazard.

[0005] Secondly, if the post-cast strip is completely filled with plain concrete, this will increase the amount of plain concrete to be removed later, and will also have an adverse effect on the protection of the waterproof membrane.

[0006] Based on this, the present invention proposes a comb-shaped post-pouring strip structure for the junction of adjacent foundation pits. Utility Model Content

[0007] To address the aforementioned technical problems, this utility model proposes a comb-shaped post-pouring strip structure for the junction of adjacent foundation pits, which is safer and more efficient, and can save construction time and improve quality.

[0008] The technical solution to achieve the purpose of this utility model is: a comb-shaped post-cast strip structure for the junction of adjacent foundation pits, including a base plate and a diaphragm wall, wherein the diaphragm wall is set on one side of the base plate, and multiple sets of structural steel bars I and II are fixedly installed at equal intervals inside the base plate, and a pair of stirrups are fixedly installed on each set of structural steel bars II, and a formwork support assembly is also included.

[0009] The formwork assembly is disposed on both sides of the structural steel reinforcement.

[0010] The formwork assembly includes support templates fixedly installed on both sides of each group of structural steel bars, and a pair of wooden blocks and a support frame are fixedly installed on one side of each support template.

[0011] In some embodiments, a plurality of steel bar connectors are fixedly installed on the side of the diaphragm wall near the second structural steel bar, and each steel bar connector is interconnected with the corresponding second structural steel bar.

[0012] In some embodiments, multiple polystyrene boards are fixedly installed at equal intervals on one side of the base plate, and a waterproof membrane and a padding layer are fixedly installed sequentially on the bottom of the base plate.

[0013] Compared with existing technologies, the significant advantages of this invention are:

[0014] Firstly, this utility model, by setting structural steel bars of different lengths, can form a concave-convex structure, thereby casting the protruding steel bar parts to form a comb-like structure, which can effectively support the wall or other enclosure structure, thereby improving the safety of the entire construction process.

[0015] Secondly, compared with the overall pre-reservation of the post-pouring strip, the protruding part of the comb-shaped post-pouring strip can contact the retaining structure such as the diaphragm wall, thereby realizing the supporting function of the retaining structure such as the diaphragm wall. Moreover, compared with plain concrete filling, the recessed part of the comb-shaped post-pouring strip does not need to be removed twice, reducing labor and saving construction time.

[0016] This method solves the problem of reserving the entire post-cast strip area in the traditional way, only binding the steel bars and not pouring concrete temporarily. However, if construction is carried out in this way, the retaining structure such as the diaphragm wall between the two adjacent foundation pits will lose the support of the bottom slab, leaving a safety hazard. Furthermore, if the entire post-cast strip area is filled with plain concrete, although it can provide support, this will increase the amount of plain concrete to be removed later, and will also have an adverse effect on the protection of the waterproof membrane. Attached Figure Description

[0017] The present invention will be further explained below with reference to the accompanying drawings and embodiments:

[0018] Figure 1 This is a schematic diagram of the overall three-dimensional structure provided by this utility model;

[0019] Figure 2 This is a schematic diagram of the supporting template and structural steel reinforcement provided by this utility model;

[0020] Figure 3 This is a top view schematic diagram of the overall structure provided by this utility model.

[0021] Explanation of reference numerals in the attached figures:

[0022] 1. Base slab; 2. Waterproof membrane; 3. Subbase; 4. Diaphragm wall; 5. Polystyrene board; 6. Support formwork; 7. Structural reinforcement 1; 8. Structural reinforcement 2; 9. Stirrups; 10. Reinforcement connector; 11. Timber; 12. Support frame. Detailed Implementation

[0023] The present invention will now be described in detail, and the technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present invention.

[0024] This utility model provides an improved comb-shaped post-cast strip structure for the junction of adjacent foundation pits. The technical solution of this utility model is as follows:

[0025] like Figures 1-3 As shown, a comb-shaped post-cast strip structure for the junction of adjacent foundation pits includes a base slab 1 and a diaphragm wall 4. The diaphragm wall 4 is located on one side of the base slab 1. Multiple sets of structural steel bars 1-7 and structural steel bars 2-8 are fixedly installed at equal intervals inside the base slab 1. Each set of structural steel bars 2-8 is fixedly equipped with a pair of stirrups 9. The structure also includes a formwork assembly. The structural steel bars 1-7 and structural steel bars 2-8 can effectively ensure the formation of the comb-shaped structure, thereby reducing the workload of traditional chiseling while improving the mutual support between the base slab 1 and the diaphragm wall 4 or other enclosure components, thus improving the structural stability of the entire construction process.

[0026] The formwork assembly is set on both sides of the structural reinforcement bar 28.

[0027] The formwork assembly includes support templates 6 fixedly installed on both sides of each group of structural steel bars 8. Each support template 6 has a pair of wooden blocks 11 and a support frame 12 fixedly installed on one side. The support templates 6 ensure the smooth progress of the concrete pouring process of the comb-shaped structure.

[0028] Furthermore, multiple steel bar connectors 10 are fixedly installed on the side of the diaphragm wall 4 near the structural steel bar 2 8. Each steel bar connector 10 is connected to the corresponding structural steel bar 2 8. The steel bar connectors 10 can quickly connect the structural steel bar 2 8, which greatly improves the steel bar connection efficiency and construction efficiency.

[0029] Furthermore, multiple polystyrene boards 5 are fixedly installed at equal intervals on one side of the base plate 1, and waterproof membrane 2 and padding layer 3 are fixedly installed sequentially on the bottom of the base plate 1. The polystyrene boards 5 can effectively protect the waterproof membrane 2 during the concrete pouring process, ensuring the overall integrity of the waterproof membrane 2 and improving the waterproof effect of the building structure.

[0030] The specific working method is as follows: According to the shape of the comb-shaped post-pouring strip, connect the structural steel bar 28 with the steel bar connector 10. The connector is pre-embedded with HRB400 grade steel bar sleeves. According to the shape of the comb-shaped post-pouring strip, the traditional water-stop steel plate is pre-embedded. The water-stop steel plate is made of rubber putty steel plate water-stop. Fix and install the formwork components to ensure the smooth progress of the subsequent concrete pouring process. The formwork contacts the diaphragm wall 4 and the seal between the formwork and the diaphragm wall 4 should be done to prevent grout leakage. The waterproof membrane 2 between the pad 3 and the base plate 1 is pre-turned up and protected. The turning-up length is 200mm to 500mm. The turned-up membrane is pre-treated. Polystyrene board 5 is used to fill the cavity of the comb-shaped post-pouring strip. Then, concrete is poured to form the comb-shaped post-pouring strip.

[0031] The technical means disclosed in this utility model are not limited to those described above, but also include technical solutions composed of equivalent substitutions of the above technical features. Matters not covered in this utility model are common knowledge to those skilled in the art.

Claims

1. A comb-shaped post-cast strip structure for the junction of adjacent foundation pits, comprising a base slab (1) and a diaphragm wall (4), wherein the diaphragm wall (4) is disposed on one side of the base slab (1), characterized in that: The base plate (1) is fixedly installed with multiple sets of structural steel bars one (7) and structural steel bars two (8) at equal intervals inside. Each set of structural steel bars two (8) is fixedly installed with a pair of stirrups (9), and also includes; A formwork assembly is provided on both sides of the structural reinforcement bar 2 (8); The formwork assembly includes support templates (6) fixedly installed on both sides of each set of structural steel bars (8), and a pair of timbers (11) and a support frame (12) are fixedly installed on one side of each support template (6).

2. The comb-shaped post-cast strip structure for the junction of adjacent foundation pits according to claim 1, characterized in that: The diaphragm wall (4) is fixedly installed with a plurality of steel bar connectors (10) on the side near the second structural steel bar (8), and each steel bar connector (10) is connected to the corresponding second structural steel bar (8).

3. A comb-shaped post-cast strip structure for the junction of adjacent foundation pits according to any one of claims 1-2, characterized in that: Multiple polystyrene boards (5) are fixedly installed at equal intervals on one side of the base plate (1), and waterproof membrane (2) and padding layer (3) are fixedly installed sequentially on the bottom of the base plate (1).

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