Underground diaphragm wall sealing structure

Abstract

The utility model discloses an underground diaphragm wall sealing structure. Comprising joint profile steel, one side of the joint profile steel is welded to the two ends of a first underground diaphragm wall steel bar, an embedded steel plate is embedded in the portion, located on the other side of the joint profile steel, of the underground diaphragm wall, and a rear sealing water stop steel plate is connected to the soil back side of the joint profile steel in a sealed mode; the side, welded to the joint profile steel, of the rear sealing water stop steel plate is further connected with the embedded steel plate in a sealed mode. The utility model has the technical effects that the embedded steel plate is embedded on the underground diaphragm wall, so that the embedded steel plate and the underground diaphragm wall are integrated, the soil facing side of the rear sealing water stop steel plate is welded with the embedded steel plate, and the joint between the two underground diaphragm walls is sealed; the joint of the underground diaphragm wall is sealed by replacing the connection of a water stop plate and a screw anchored on the underground diaphragm wall, and underground water is prevented from flowing into a foundation pit from the joint between the underground diaphragm walls.

Description

Technical Field

[0001] The utility model relates to the field of underground continuous wall structures, in particular to an underground continuous wall sealing structure. Background Art

[0002] In underground engineering construction, underground continuous walls are widely used as foundation pit support structures due to their excellent water tightness and structural stability. However, since underground continuous walls inevitably produce joints during construction, these joints become potential channels for groundwater infiltration, which may cause a series of engineering safety problems such as foundation pit water gushing and surrounding building settlement.

[0003] At present, the commonly used structure at the joint is to use the rear-sealed water-stopping steel plate and the expansion bolts to anchor and seal the underground continuous wall joints. The rear-sealed water-stopping steel plate and the underground continuous wall are anchored and connected with the expansion screws. There is a gap between the rear-sealed water-stopping steel plate and the underground continuous wall. Groundwater may flow out from the above gap, causing leakage at the joint of the two underground continuous walls. Utility Model Content

[0004] The technical problem to be solved by the utility model is that the joints between existing underground continuous walls may leak, and the purpose is to provide an underground continuous wall sealing structure to solve the problem of possible water leakage at the joints of the existing underground continuous walls.

[0005] The utility model is realized by the following technical solutions:

[0006] A sealing structure for an underground continuous wall comprises a joint steel, a rear-sealing water-stopping steel plate and an embedded steel plate. One side of the joint steel is welded to the steel bars of a first underground continuous wall, the embedded steel plate is connected to a second underground continuous wall on the other side of the joint steel, the rear-sealing water-stopping steel plate is sealingly connected to the back-of-soil side of the joint steel, and the side of the rear-sealing water-stopping steel plate welded to the joint steel is also sealingly connected to the embedded steel plate to prevent water leakage from the expansion joint.

[0007] The utility model adopting the above scheme provides a joint steel and welds one side of the joint steel to the two ends of the first underground continuous wall steel bars to seal the first underground continuous wall and the joint steel. An embedded steel plate is embedded in the underground continuous wall on the other side of the joint steel to make the embedded steel plate and the underground continuous wall on the other side of the joint steel become one. A rear-sealing water-stopping steel plate is connected to the end of the joint steel away from the side wall of the foundation pit, and the side of the rear-sealing water-stopping steel plate welded to the joint steel is also sealed to the embedded steel plate, thereby sealing the joint between the two underground continuous walls, instead of welding the water-stop plate to the screws anchored on the underground continuous wall to seal the joint between the underground continuous walls, to prevent groundwater from flowing from the joint between the underground continuous walls into the foundation pit.

[0008] Preferably, the joint steel is an I-beam, one end of the first underground continuous wall reinforcement close to the side wall of the foundation pit is connected to the outer side of the I-beam wing plate, and the other end of the first underground continuous wall reinforcement is connected to the inner side of the I-beam wing plate.

[0009] In this way, by using I-beams as the joint steel, it is convenient to utilize the wide characteristics of the two wing plates of the I-beam. When one end of the first underground continuous wall steel bar close to the side wall of the foundation pit is connected to the outer side of the wing plate of the I-beam and the other end of the first underground continuous wall steel bar is connected to the inner side of the wing plate of the I-beam, sufficient welding space is guaranteed, thereby ensuring the strength and rigidity of the welding point.

[0010] Preferably, the first underground continuous wall reinforcement is overlap-welded to the I-beam.

[0011] In this way, the first underground continuous wall reinforcement and the I-beam are overlap-welded to improve the strength and rigidity of the welding point.

[0012] Preferably, a plurality of anchor hooks are connected to the embedded steel plate, and the embedded steel plate is connected to the second underground continuous wall steel bars through the anchor hooks.

[0013] In this way, by connecting a plurality of anchor hooks to the embedded steel plate, it is convenient to connect the embedded steel plate with the second underground continuous wall steel bar through the anchor hooks, thereby ensuring the connection strength and rigidity between the embedded steel plate and the underground continuous wall steel bar.

[0014] Preferably, the hook-shaped end of the anchor hook is welded to the second underground continuous wall steel bar, and the other end of the anchor hook is welded to the embedded steel plate.

[0015] In this way, by welding the hook-shaped end of the anchor hook to the second underground continuous wall steel bar and also welding the other end of the anchor hook to the embedded steel plate, the strength and rigidity of the connection point can be improved.

[0016] Preferably, the embedded steel plate is a rectangular steel plate, and the embedded steel plate is located on the back soil side of the second underground continuous wall.

[0017] In this way, by using rectangular steel plates as the embedded steel plates and setting the embedded steel plates on the soil-facing side of the second underground continuous wall, it is convenient to weld the embedded steel plates with the rear sealing water-stop plates, and the expansion joint between the two continuous walls can be sealed from one side of the foundation pit side wall.

[0018] Preferably, the soil-facing side of the rear water-stopping steel plate is fully overlapped and welded with the joint steel section and the embedded steel plate.

[0019] In this way, by overlapping and fully welding the soil-facing side of the rear sealing water-stopping steel plate with the joint steel and the embedded steel plate, the effect of sealing the expansion joint can be easily achieved.

[0020] Preferably, the distance between the anchor hook and the side edge of the embedded steel plate is 24 mm to 25 mm.

[0021] In this way, by setting the distance between the anchor hook and the side of the embedded steel plate to 24mm~25mm, it is convenient to locate the connection point in the middle of the embedded steel plate, and the stress point of the embedded steel plate is located in the middle of the embedded steel plate, thereby preventing the embedded steel plate from deforming during use and affecting the sealing effect of the joint between the two underground continuous walls.

[0022] Preferably, the rear water-stopping steel plate and the embedded steel plate are fully overlapped and welded.

[0023] In this way, the strength and rigidity of the connection point can be ensured by overlapping and fully welding the rear sealing water-stopping steel plate with the embedded steel plate.

[0024] Preferably, the overlap full weld width is 7.5 mm to 8 mm.

[0025] Compared with the prior art, the utility model has the following advantages and beneficial effects:

[0026] 1. By pre-embedding the embedded steel plate in the underground continuous wall, the embedded steel plate underground continuous wall becomes one, the soil-facing side of the rear-sealed water-stop steel plate is welded to the embedded steel plate, and the joint between the two underground continuous walls is sealed, instead of connecting the water-stop plate with the screws anchored on the underground continuous wall to seal the underground continuous wall joint, so as to prevent groundwater from flowing into the foundation pit from the joint between the underground continuous walls.

[0027] 2. By setting up embedded steel plates, material costs and labor costs are reduced, and economic benefits are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The drawings described herein are used to provide a further understanding of the embodiments of the present utility model, constitute a part of this application, and do not constitute a limitation of the embodiments of the present utility model. In the drawings:

[0029] Figure 1 It is a top view of the utility model;

[0030] Figure 2 It is a three-dimensional schematic diagram of the utility model;

[0031] Figure 3 It is an assembly diagram of the embedded steel plate and the anchor hook in the utility model;

[0032] Figure 4 This utility model Figure 3 Side view of.

[0033] Marks and corresponding parts names in the attached drawings:

[0034] I-beam 1, embedded steel plate 2, anchor hook 3, rear sealing water-stopping steel plate 4, first underground continuous wall steel bar 51, second underground continuous wall steel bar 52, welding area 6. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solutions and advantages of the utility model more clearly understood, the utility model is further described in detail below in conjunction with embodiments and drawings. The schematic implementation manner of the utility model and its description are only used to explain the utility model and are not intended to limit the utility model.

[0036] Throughout the specification, references to "one embodiment," "an embodiment," "an example," or "an example" mean that a particular feature, structure, or characteristic described in conjunction with the embodiment or example is included in at least one embodiment of the present invention. Therefore, the phrases "one embodiment," "an embodiment," "an example," or "an example" appearing in various places throughout the specification do not necessarily all refer to the same embodiment or example. In addition, particular features, structures, or characteristics may be combined in one or more embodiments or examples in any appropriate combination and / or sub-combination. In addition, it will be appreciated by those of ordinary skill in the art that the diagrams provided herein are for illustrative purposes, and the diagrams are not necessarily drawn to scale. The term "and / or" used herein includes any and all combinations of one or more of the associated listed items.

[0037] In the description of the present invention, the terms "front", "rear", "left", "right", "up", "down", "vertical", "horizontal", "high", "low", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limiting the scope of protection of the present invention.

[0038] The terms "first", "second", etc. used in the present invention are only used to distinguish the corresponding components for the purpose of clarity of description, and are not intended to limit any order or emphasize importance, etc. In addition, the term "connected" used in this article can be directly connected or indirectly connected via other components without special explanation.

[0039] Example 1

[0040] This embodiment 1 provides an underground continuous wall sealing structure, such as Figure 1-Figure 4As shown, the position where the underground continuous wall needs to be sealed has a first underground continuous wall and a second underground continuous wall adjacent to each other, and the first underground continuous wall and the second underground continuous wall are respectively provided with a first underground continuous wall steel cage and a second underground continuous wall steel cage, and the first underground continuous wall steel cage and the second underground continuous wall steel cage are respectively composed of a plurality of first underground continuous wall steel bars 51 and a second underground continuous wall steel bars 52. The underground continuous wall sealing structure of this embodiment includes a joint steel and an embedded steel plate 2, the joint steel is arranged between the first underground continuous wall and the second underground continuous wall, and the embedded steel plate 2 is arranged on the side wall of one of the continuous walls close to the foundation pit. In this embodiment, the embedded steel plate 2 is arranged on the side wall of the second underground continuous wall; for the convenience of description, the following description is made with the first underground continuous wall being located on the left side of the joint steel, the second underground continuous wall being located on the right side of the joint steel, the side close to the side wall of the foundation pit being the soil facing side, and the side away from the side wall of the foundation pit being the soil backing side.

[0041] The left side of the joint steel is welded to the first underground continuous wall reinforcement 51, and the back-to-earth side is connected to the embedded steel plate 2 through the rear sealing water-stopping steel plate 4. One side (left side) of the rear sealing water-stopping steel plate 4 is connected to the back-to-earth side of the joint steel, and the other side (i.e., the side away from the joint steel, the right side) of the rear sealing water-stopping steel plate 4 is sealed and connected to the embedded steel plate 2 to prevent water leakage in the expansion joint.

[0042] See also Figure 1 and Figure 2 The joint steel adopts I-beam 1, which includes ribs and two wing plates respectively connected to the two ends of the ribs. The first underground continuous wall and the second underground continuous wall are located on both sides of the ribs, so that one wing plate is close to the side wall of the foundation pit, and the other wing plate is far away from the side wall of the foundation pit. The end of the first underground continuous wall reinforcement 51 close to the side wall of the foundation pit is connected to the outer side of the wing plate of the I-beam 1 close to the side wall of the foundation pit, and the other end of the first underground continuous wall reinforcement 51 is connected to the inner side of the other wing plate of the I-beam 1 (far away from the end of the side wall of the foundation pit). The joint steel adopts I-beam 1 to facilitate the use of the characteristics of the width of the two wing plates of the I-beam 1. When the end of the first underground continuous wall reinforcement 51 close to the side wall of the foundation pit is connected to the outer side of the wing plate of the I-beam 1 and the other end of the first underground continuous wall reinforcement 51 is connected to the inner side of the wing plate of the I-beam 1, sufficient welding space is guaranteed, thereby ensuring the strength and rigidity of the welding point.

[0043] See also Figure 1 and Figure 2 The first underground continuous wall reinforcement 51 is overlap-welded with the flange of the I-beam 1. The I-beam 1 can also be replaced by other steel sections, such as H-beam and channel steel, etc. As long as there is enough welding space, the strength and rigidity of the welding point can be guaranteed.

[0044] See also Figure 3 and Figure 4 A plurality of anchor hooks 3 are connected to the embedded steel plate 2, and the embedded steel plate 2 is connected to the second underground continuous wall steel bar 52 through the anchor hooks 3, so as to facilitate the connection of the embedded steel plate 2 to the second underground continuous wall steel bar 52 through the anchor hooks 3, thereby ensuring the connection strength and rigidity between the embedded steel plate 2 and the underground continuous wall steel bar.

[0045] See also Figure 1 The hook-shaped end of the anchor hook 3 is welded to the second underground continuous wall steel bar 52, and the other end of the anchor hook 3 is welded to the embedded steel plate 2, so as to improve the strength and rigidity of the connection point.

[0046] See also Figure 3 and Figure 4 The embedded steel plate 2 adopts a rectangular steel plate structure, and the embedded steel plate 2 is located on the back soil side of the second underground continuous wall 52.

[0047] Specifically, the width of the embedded steel plate 2 is 100 mm, the thickness of the embedded steel plate 2 is 6 mm, and the length of the embedded steel plate 2 is consistent with the length of the second underground continuous wall reinforcement 52. The distance between two adjacent anchor hooks 3 is 400 mm.

[0048] See also Figure 3 and Figure 4 The rear sealing water-stopping steel plate 4 is overlapped and fully welded with the joint steel on the soil-facing side, and is overlapped and fully welded with the embedded steel plate 2 on the other side.

[0049] Specifically, the distance between the anchor hook 3 and the side of the embedded steel plate 2 is 24mm to 25mm, so that the connection point is located in the middle of the embedded steel plate 2 and the stress point of the embedded steel plate 2 is located in the middle, preventing the embedded steel plate 2 from deforming during use and affecting the sealing effect of the joint between the two underground continuous walls.

[0050] See also Figure 3 and Figure 4 , the rear sealing water-stopping steel plate 4 is overlapped and fully welded with the pre-buried steel plate 2. In this way, the strength and rigidity of the connection point are ensured by overlapping and fully welding the rear sealing water-stopping steel plate 4 with the pre-buried steel plate 2.

[0051] See also Figure 3 and Figure 4 , the lap joint full weld width is 7.5mm to 8mm. Specifically, the welding area 6 formed by the lap joint full weld is a rectangle with a length the same as the height of the underground continuous wall and a width of 7.5-8mm.

[0052] The following takes the overlap full weld width of 8 mm and the distance between the anchor hook 3 and the side of the embedded steel plate 2 of 25 mm as an example to illustrate the specific construction steps of the sealing structure in this embodiment during construction. The specific construction includes the following steps:

[0053] 1. During the production of the first-phase trench section steel cage of the underground continuous wall, the steel cage composed of the I-beam 1 and the first underground continuous wall steel bar 51 is welded as a whole. The bottom of the I-beam 1 plate is 250 mm above the bottom elevation of the first underground continuous wall, and the top is 500 mm above the top elevation of the first underground continuous wall.

[0054] 2. During the production of the second-phase slot section steel cage of the second underground continuous wall, a space for the embedded steel plate 2 is reserved at the design required position. Specifically, the embedded steel plate 2 is set to have a width of 100 mm and a thickness of 6 mm, and its length is consistent with the length of the underground continuous wall steel bars. A pair of anchor hooks 3 are welded on one side of the embedded steel plate 2 with a spacing of 400 mm. The anchor hooks 3 are 25 mm away from the edge of the steel plate and are welded and fixed to the second underground continuous wall steel bars 52; the other side will be fully welded and fixed to the rear water-stop steel plate 4.

[0055] 3. After the underground continuous wall construction is completed, the rear sealing water-stopping steel plate 4 is placed inside the foundation pit and welded to the pre-buried steel plate 2 and the I-beam 1 pre-buried in the second underground continuous wall. Specifically, the width of the rear sealing water-stopping steel plate 4 is set to 400mm, the thickness is 6mm, the length is consistent with the length of the ground-connected wall steel bar, and the height of the weld is set to 8mm.

[0056] 4. After welding is completed, conduct a comprehensive inspection of the weld to ensure that the welding quality meets the relevant engineering standards and specifications.

[0057] The specific implementation methods described above further illustrate the purpose, technical solutions and beneficial effects of the utility model in detail. It should be understood that the above description is only the specific implementation method of the utility model and is not used to limit the protection scope of the utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. An underground continuous wall sealing structure, characterized in that: It includes a joint steel, a rear-sealing water-stopping steel plate and an embedded steel plate. One side of the joint steel is welded to the first underground continuous wall steel bar, and the embedded steel plate is connected to the second underground continuous wall on the other side of the joint steel. The rear-sealing water-stopping steel plate is sealed and connected to the back-soil side of the joint steel. The side of the rear-sealing water-stopping steel plate welded to the joint steel is also sealed and connected to the embedded steel plate to prevent water leakage in the expansion joint.

2. The underground continuous wall sealing structure according to claim 1, characterized in that: The joint steel is an I-beam, one end of the first underground continuous wall reinforcement close to the side wall of the foundation pit is connected to the outer side of one wing plate of the I-beam, and the other end of the first underground continuous wall reinforcement is connected to the inner side of the other wing plate of the I-beam.

3. The underground continuous wall sealing structure according to claim 2, characterized in that: The first underground continuous wall reinforcement is overlap-welded with the I-beam.

4. The underground continuous wall sealing structure according to claim 1, characterized in that: The embedded steel plate is connected with a plurality of anchor hooks, and the embedded steel plate is connected with the second underground continuous wall reinforcement through the anchor hooks.

5. The underground continuous wall sealing structure according to claim 4, characterized in that: The hook-shaped end of the anchor hook is welded to the second underground continuous wall steel bar, and the other end of the anchor hook is welded to the embedded steel plate.

6. The underground continuous wall sealing structure according to claim 4, characterized in that: The embedded steel plate is a rectangular steel plate, and the embedded steel plate is located on the back soil side of the second underground continuous wall.

7. The underground continuous wall sealing structure according to claim 6, characterized in that: The soil-facing side of the rear water-stopping steel plate is fully overlapped and welded with the joint steel and the embedded steel plate.

8. The underground continuous wall sealing structure according to claim 6, characterized in that: The distance between the anchor hook and the side edge of the embedded steel plate is 24 mm to 25 mm.

9. The underground continuous wall sealing structure according to any one of claims 1 to 8, characterized in that: The rear water-stopping steel plate and the embedded steel plate are overlapped and fully welded.

10. The underground continuous wall sealing structure according to claim 9, characterized in that: The overlap full weld width is 7.5 mm to 8 mm.

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