Vertical joint structure of fabricated diaphragm wall

Abstract

The utility model discloses an assembly type underground diaphragm wall vertical joint structure which comprises a first wall body unit and a second wall body unit, the first wall body unit and the second wall body unit are connected end to end, a combined type steel groove is formed in the tail portion of the first wall body unit, the combined type steel groove is flush with the tail side of the first wall body unit, and the second wall body unit is connected with the combined type steel groove. A combined steel slot is arranged in the first wall body unit, a combined steel plug-in is arranged in the second wall body unit, the combined steel plug-in extends out of the side wall of the second wall body unit and is matched with the combined steel slot, and an enclosed cavity is further formed between the first wall body unit and the second wall body unit. When the prefabricated underground diaphragm wall is inserted for construction, slab staggering between two adjacent wall bodies can be accurately controlled, and the construction precision is high. The self-compacting concrete is poured at the joint between the adjacent wall bodies, so that the shear capacity of the joint can be effectively improved, and the connection strength of the joint position is ensured.

Description

Technical Field

[0001] This utility model belongs to the field of underground structure engineering technology, specifically relating to a prefabricated diaphragm wall vertical joint structure. Background Technology

[0002] Traditional cast-in-place diaphragm wall construction has a long cycle, requiring on-site processes such as rebar tying and formwork installation, which is not only time-consuming but also affected by factors such as weather. Prefabricated diaphragm walls, through the use of prefabricated components, can significantly shorten on-site construction time. Cast-in-place construction generates substantial noise and dust pollution, while prefabricated construction can complete most of the work in a factory, reducing environmental pollution at the construction site. However, prefabricated diaphragm walls also have some drawbacks. The vertical joint structure of prefabricated diaphragm walls is a crucial part of this technology, involving the connection and sealing between prefabricated components to ensure the integrity and waterproofing performance of the underground wall. With continuous technological advancements, the vertical joint structure of prefabricated diaphragm walls is constantly being optimized to meet higher engineering requirements. Summary of the Invention

[0003] This utility model is proposed to solve the problems existing in the prior art, and its purpose is to provide a prefabricated diaphragm wall vertical joint structure.

[0004] The technical solution of this utility model is: a prefabricated diaphragm wall vertical joint structure, including a first wall unit and a second wall unit, the first wall unit and the second wall unit are connected end to end, a combined steel channel is provided in the tail of the first wall unit, the combined steel channel is flush with the tail side of the first wall unit, a combined steel insert is provided in the second wall unit, the combined steel insert protrudes from the side wall of the second wall unit and cooperates with the combined steel channel, and an enclosing cavity is also formed between the first wall unit and the second wall unit.

[0005] Furthermore, welded connectors are provided between the first wall unit and the second wall unit.

[0006] Furthermore, a large assembly groove is formed on the rear side of the first wall unit, which accommodates the combined steel channel, and a first groove is formed at the bottom of the large assembly groove.

[0007] Furthermore, the combined steel trough includes two first connecting steel members, which are L-shaped and arranged facing each other.

[0008] Furthermore, a third connecting steel member is embedded in the large mounting groove, and an installation gap is formed between the third connecting steel member and the groove wall of the large mounting groove. The first connecting steel member is inserted into the installation gap and fixed to the third connecting steel member.

[0009] Furthermore, the two first connecting steel pieces and the bottom of the mounting groove are combined to form a combined steel channel, with the first connecting steel pieces flush with the tail of the first wall unit.

[0010] Furthermore, the combined steel insert includes two second connecting steel pieces, which are L-shaped and arranged opposite to each other.

[0011] Furthermore, the opposite bent side of the second connecting steel member is inserted into the bottom of the first connecting steel member and the mounting large groove to form a combined steel groove.

[0012] Furthermore, a second groove is formed on the side wall of the second wall unit, and the openings of the second groove and the first groove face each other.

[0013] The beneficial effects of this utility model are as follows:

[0014] During the insertion construction of the prefabricated diaphragm wall of this utility model, the misalignment between two adjacent walls can be precisely controlled, resulting in high construction accuracy.

[0015] After the adjacent wall unit insertion construction is completed, the post-pouring self-compacting concrete and steel square tube grouting construction at the joint are carried out. This will not affect the subsequent insertion construction of the diaphragm wall, and significantly improves the construction efficiency.

[0016] The self-compacting concrete poured after the joint between adjacent walls can effectively improve the shear resistance of the joint and ensure the connection strength at the joint position. Attached Figure Description

[0017] Figure 1 This is a top view of the present invention;

[0018] Figure 2 This is a partially enlarged structural schematic diagram of the present invention;

[0019] Figure 3 This is a cross-sectional structural diagram of the first connecting steel component in this utility model;

[0020] Figure 4 This is a cross-sectional structural diagram of the second connecting steel member in this utility model;

[0021] Figure 5 This is a schematic cross-sectional view of the combined structure of the connecting steel parts in this utility model;

[0022] in:

[0023] 1 First wall unit 2 Second wall unit

[0024] 3 First connecting steel component 4 Second connecting steel component

[0025] 5. Third connecting steel component; 6. Post-pouring self-compacting concrete

[0026] 7 First groove 8 Second groove. Detailed Implementation

[0027] The present invention will now be described in detail with reference to the accompanying drawings and embodiments:

[0028] like Figures 1 to 5 As shown, a prefabricated diaphragm wall vertical joint structure includes a first wall unit 1 and a second wall unit 2, which are connected end to end. A combined steel channel is provided at the tail of the first wall unit 1, and the combined steel channel is flush with the tail side of the first wall unit 1. A combined steel insert is provided in the second wall unit 2, and the combined steel insert protrudes from the side wall of the second wall unit 2 and cooperates with the combined steel channel. An enclosed cavity is also formed between the first wall unit 1 and the second wall unit 2.

[0029] Furthermore, a welded connector is provided between the first wall unit 1 and the second wall unit 2.

[0030] Furthermore, a large assembly groove is formed on the tail side of the first wall unit 1, which accommodates the combined steel channel, and a first groove 7 is formed at the bottom of the large assembly groove.

[0031] Furthermore, the combined steel trough includes two first connecting steel parts 3, which are L-shaped and arranged facing each other.

[0032] Furthermore, a third connecting steel member 5 is embedded in the large mounting groove, and an installation gap is formed between the third connecting steel member 5 and the groove wall of the large mounting groove. The first connecting steel member 3 is inserted into the installation gap and fixed to the third connecting steel member 5.

[0033] Furthermore, the two first connecting steel parts 3 are joined with the bottom of the mounting groove to form a combined steel trough, and the first connecting steel parts 3 are flush with the tail of the first wall unit 1.

[0034] Furthermore, the combined steel insert includes two second connecting steel parts 4, which are L-shaped and arranged opposite to each other.

[0035] Furthermore, the opposite bent side of the second connecting steel member 4 is inserted into the bottom of the first connecting steel member 3 and the mounting large groove to form a combined steel groove.

[0036] Furthermore, a second groove 8 is formed on the side wall of the second wall unit 2, and the openings of the second groove 8 and the first groove 7 face each other.

[0037] Specifically, the second groove 8 and the first groove 7 are both open grooves. The second groove 8 and the first groove 7 are the same size. The cavity formed by the second groove 8 and the first groove 7 has a cross-section that is roughly hexagonal. The second groove 8 and the first groove 7 need to be combined with the groove depth of the large groove to form an octagonal cross-section.

[0038] More specifically, the cavity formed by the second groove 8, the first groove 7, and the assembly large groove is filled with self-compacting concrete during construction.

[0039] Specifically, the third connecting steel member 5 is a square steel, the first connecting steel member 3 and the third connecting steel member 5 are fixed together, and the third connecting steel member 5 has a perforated hole.

[0040] Specifically, the welded connector is an angle steel set on the side wall of the first wall unit 1 and the second wall unit 2. A part of the angle steel is inserted into the wall unit and fixed to the concrete. The tie part is the other side of the angle steel. Cement-based grout is injected into the cavity formed in the middle.

[0041] Specifically, the second groove 8 and the first groove 7 are located at corresponding positions in the middle of the first wall unit 1 and the second wall unit 2.

[0042] Specifically, the second groove 8 and the first groove 7 extend along the entire height of the wall, and correspondingly, the first connecting steel member 3, the second connecting steel member 4, and the third connecting steel member 5 also extend along the entire height of the wall.

[0043] As a variation, the first groove 7 and the second groove 8 extend along the local height of the wall, and correspondingly, the first connecting steel member 3, the second connecting steel member 4, and the third connecting steel member 5 also extend along the local height of the wall.

[0044] The construction method of this utility model is as follows:

[0045] A. In the precast reinforced concrete underground continuous wall, the first connecting steel member 3, the second connecting steel member 4, and the third connecting steel member 5 are pre-embedded and fixed at the corresponding positions of the wall unit during precasting.

[0046] B. Construction site enclosure, site leveling, and traffic diversion; trenching for diaphragm wall construction using mud slurry support.

[0047] C. Position and insert the first wall unit 1, and temporarily fix the first wall unit 1; align the groove of the first wall unit 1 with the groove of the second wall unit 2. During this process, ensure that the tie part of the second connecting steel member 4 is inserted into the first connecting steel member 3 so that they are tied together, which plays a positioning and guiding role.

[0048] D. Continuously insert subsequent wall units along the direction of the underground continuous wall trench. During the insertion of subsequent wall units, self-compacting concrete is poured into the cavity formed by the first groove 7 and the second groove 8 in the first wall unit 1 and the second wall unit 2, thereby improving the connection rigidity of adjacent wall units and the overall waterproof effect.

[0049] E. Inject cement-based grout into the steel pipe at the joint of the first wall unit 1 to seal the joint between the wall units and achieve waterproofing of the joint.

[0050] F. After constructing several sections of the underground continuous wall, cement grout is injected into the gaps between the precast wall units and the trench to replace the mud in the gaps and form an outer waterproof layer for the overall structure.

[0051] G. Continue following the steps above until the entire diaphragm wall construction is completed;

[0052] During the insertion construction of the prefabricated diaphragm wall of this utility model, the misalignment between two adjacent walls can be precisely controlled, resulting in high construction accuracy.

[0053] After the adjacent wall unit insertion construction is completed, the post-pouring self-compacting concrete and steel square tube grouting construction at the joint are carried out. This will not affect the subsequent insertion construction of the diaphragm wall, and significantly improves the construction efficiency.

[0054] The self-compacting concrete poured after the joint between adjacent walls can effectively improve the shear resistance of the joint and ensure the connection strength at the joint position.

Claims

1. A prefabricated diaphragm wall vertical joint structure, comprising a first wall unit (1) and a second wall unit (2), wherein the first wall unit (1) and the second wall unit (2) are connected end to end, characterized in that: A combined steel channel is provided at the tail of the first wall unit (1), and the combined steel channel is flush with the tail side of the first wall unit (1). A combined steel insert is provided in the second wall unit (2), and the combined steel insert protrudes from the side wall of the second wall unit (2) and cooperates with the combined steel channel. An enclosed cavity is also formed between the first wall unit (1) and the second wall unit (2).

2. The prefabricated diaphragm wall vertical joint structure according to claim 1, characterized in that: Welded connectors are also provided between the first wall unit (1) and the second wall unit (2).

3. The prefabricated diaphragm wall vertical joint structure according to claim 1, characterized in that: The first wall unit (1) forms a large mounting groove on its tail side, which accommodates the combined steel channel, and a first groove (7) is formed at the bottom of the large mounting groove.

4. The prefabricated diaphragm wall vertical joint structure according to claim 3, characterized in that: The combined steel trough includes two first connecting steel parts (3), which are L-shaped and arranged facing each other.

5. A prefabricated diaphragm wall vertical joint structure according to claim 4, characterized in that: The assembly groove is fitted with a third connecting steel piece (5), and an installation gap is formed between the third connecting steel piece (5) and the groove wall of the assembly groove. The first connecting steel piece (3) is inserted into the installation gap and fixed with the third connecting steel piece (5).

6. A prefabricated diaphragm wall vertical joint structure according to claim 5, characterized in that: The two first connecting steel parts (3) are enclosed with the bottom of the mounting groove to form a combined steel groove, and the first connecting steel parts (3) are flush with the tail of the first wall unit (1).

7. A prefabricated diaphragm wall vertical joint structure according to claim 6, characterized in that: The combined steel insert includes two second connecting steel parts (4), which are L-shaped and arranged opposite each other.

8. A prefabricated diaphragm wall vertical joint structure according to claim 7, characterized in that: The opposite bent side of the second connecting steel part (4) is inserted into the first connecting steel part (3) and the bottom of the large groove is assembled to form a combined steel groove.

9. A prefabricated diaphragm wall vertical joint structure according to claim 3, characterized in that: A second groove (8) is formed on the side wall of the second wall unit (2), and the openings of the second groove (8) and the first groove (7) face each other.

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