Underground diaphragm wall supporting device in deep foundation pit

Abstract

The utility model discloses an underground diaphragm wall supporting device in a deep foundation pit. The first embedded part and the second embedded part are embedded in a first underground diaphragm wall and a second underground diaphragm wall on the opposite sides of the deep foundation pit, the first profile steel enclosing purlin and the first steel support correspond to the first embedded part, and the second profile steel enclosing purlin and the second steel support correspond to the second embedded part. The first embedded part is fixedly connected with the first profile steel enclosing purlin, the first profile steel enclosing purlin is fixedly connected with one side of the first steel support, the first flange piece is fixed to the other side of the first steel support, the second embedded part is fixedly connected with the second profile steel enclosing purlin, and the second profile steel enclosing purlin is fixedly connected with one side of the second steel support. According to the method, the corresponding steel supports on the horizontal plane are connected into a whole, the limitation that the steel supports conduct single-point jacking on the enclosure structure is overcome, the construction speed is increased, and the foundation pit exposure time is shortened.

Description

Technical Field

[0001] This utility model relates to the field of deep pit civil engineering construction, and in particular to the field of construction using a combination of steel supports and steel walers in deep foundation pits. Background Technology

[0002] In conventional construction methods for deep foundation pits near subway stations, iron components are typically embedded in the foundation wall, which are then connected to and supported by steel supports erected during the later excavation process. As excavation and structural reconstruction proceed, the foundation wall will be affected and deformed. To address this deformation, axial force is typically controlled using a servo system.

[0003] However, in actual implementation, the conventional approach is to transform the foundation pit into an independent location, which requires multiple steel supports erected on the horizontal surface to address the pit deformation issue. This construction process is cumbersome and time-consuming. Especially when constructing foundation pits near the subway, the deformation of the pit directly affects the safety of the subway platform and tunnel structure, as well as the safety of people and property on the operating subway line. Only by accelerating the construction speed of the foundation pit closure and improving the structural quality and safety of the foundation pit can the safety of the subway line be guaranteed.

[0004] To expedite the construction of the foundation pit adjacent to the subway station, quickly form the bracing and top slab structure, and ensure that the support and retaining structures form an effective whole, thereby reducing construction interruptions, is an urgent problem that needs to be solved for the existing steel-supported retaining structure system. Utility Model Content

[0005] This utility model addresses the problems and shortcomings of existing technologies by providing a support device for underground continuous walls in deep foundation pits.

[0006] The present invention solves the above-mentioned technical problems through the following technical solution:

[0007] This utility model provides a diaphragm wall support device for deep foundation pits, characterized in that it includes a first embedded part pre-embedded in a first diaphragm wall on opposite sides of the deep foundation pit and a second embedded part pre-embedded in a second diaphragm wall, a first steel waler and a first steel support corresponding to the first embedded part, and a second steel waler and a second steel support corresponding to the second embedded part. The first embedded part is fixedly connected to the first steel waler, the first steel waler is fixedly connected to one side of the first steel support, and a first flange is fixed to the other side of the first steel support. The second embedded part is fixedly connected to the second steel waler, the second steel waler is fixedly connected to one side of the second steel support, and a second flange is fixed to the other side of the second steel support. The first flange and the second flange are fixedly connected.

[0008] Preferably, the first embedded part includes multiple first transverse anchor bars and a first square steel plate fixed to the multiple first transverse anchor bars. One end of the multiple first transverse anchor bars is fixed to the inner side of the first square steel plate. The outer side of the first square steel plate is flush with the outer surface of the first diaphragm wall. The first square steel plate is fixedly connected to the first steel waler. The second embedded part includes multiple second transverse anchor bars and a second square steel plate fixed to the multiple second transverse anchor bars. One end of the multiple second transverse anchor bars is fixed to the inner side of the second square steel plate. The outer side of the second square steel plate is flush with the outer surface of the second diaphragm wall. The second square steel plate is fixedly connected to the second steel waler.

[0009] Preferably, the multiple first transverse anchor bars are of equal length and evenly spaced, and the multiple second transverse anchor bars are of equal length and evenly spaced.

[0010] Preferably, both the first steel support and the second steel support are steel cylinder structures.

[0011] Preferably, a plurality of first reinforcing ribs are uniformly reinforced between the first steel support and the first flange along the circumferential direction, and a plurality of second reinforcing ribs are uniformly reinforced between the second steel support and the second flange along the circumferential direction.

[0012] Preferably, a first fixing plate is fixed to the side of the first steel support near the first steel waler, and the first fixing plate is fixedly connected to the first steel waler; a second fixing plate is fixed to the side of the second steel support near the second steel waler, and the second fixing plate is fixedly connected to the second steel waler.

[0013] Preferably, a plurality of third reinforcing ribs are added between the first steel support and the first fixed plate, and a plurality of fourth reinforcing ribs are added between the second steel support and the second fixed plate.

[0014] Preferably, the first steel waler is an angle steel with the horizontal part at the top and the vertical part welded to the first square steel plate, and the second steel waler is an angle steel with the horizontal part at the top and the vertical part welded to the second square steel plate.

[0015] Preferably, the first flange and the second flange are anchored together.

[0016] The positive and progressive effects of this utility model are as follows:

[0017] Compared with existing technologies, this invention connects two corresponding steel supports on a horizontal plane into a single unit, overcoming the limitations of single-point support for the retaining structure. It also reduces the number of horizontal supports, accelerates construction, and shortens the exposure time of the foundation pit, thus enabling faster completion of basement structure construction. Furthermore, this support device is simple in structure, low in cost, and easy to manufacture. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the horizontal structure of the underground continuous wall support device in a deep foundation pit, which is a preferred embodiment of the present invention.

[0019] Figure 2 This is a structural schematic diagram of the underground continuous wall support device in a deep foundation pit, which is a preferred embodiment of the present invention. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0021] like Figure 1 and Figure 2 As shown, this embodiment provides a diaphragm wall support device in a deep foundation pit, which includes a first embedded part 2 and a second embedded part embedded in a first diaphragm wall 1 on opposite sides of the deep foundation pit, a first steel waler 3 and a first steel support 4 corresponding to the first embedded part 2, and a second steel waler and a second steel support 10 corresponding to the second embedded part. The first embedded part 2 is fixedly connected to the first steel waler 3, the first steel waler 3 is fixedly connected to one side of the first steel support 4, and a first flange 5 is fixed to the other side of the first steel support 4. The second embedded part is fixedly connected to the second steel waler, the second steel waler is fixedly connected to one side of the second steel support 10, and a second flange 6 is fixed to the other side of the second steel support 10. The first flange 5 and the second flange 6 are fixedly connected.

[0022] The first embedded part 2 includes multiple first transverse anchor bars 21 and a first square steel plate 22 fixed to the multiple first transverse anchor bars 21. One end of the multiple first transverse anchor bars 21 is fixed to the inner side of the first square steel plate 22. The outer side of the first square steel plate 22 is flush with the outer surface of the first underground continuous wall 1. The first square steel plate 22 is fixedly connected to the first steel waler 3. The second embedded part includes multiple second transverse anchor bars and a second square steel plate fixed to the multiple second transverse anchor bars. One end of the multiple second transverse anchor bars is fixed to the inner side of the second square steel plate. The outer side of the second square steel plate is flush with the outer surface of the second underground continuous wall. The second square steel plate is fixedly connected to the second steel waler.

[0023] Among them, multiple first transverse anchor bars 21 are of equal length and evenly spaced, and multiple second transverse anchor bars are of equal length and evenly spaced.

[0024] The first steel support 4 and the second steel support 10 are both steel cylinder structures. Multiple first reinforcing ribs 7 are uniformly reinforced between the first steel support 4 and the first flange 5 along the circumferential direction. Multiple second reinforcing ribs 11 are uniformly reinforced between the second steel support 10 and the second flange 6 along the circumferential direction. The first flange 5 and the second flange 6 are connected by anchor bolts.

[0025] Among them, a first fixing plate 8 is fixed on the side of the first steel support 4 near the first steel waler 3, and the first fixing plate 8 is fixedly connected to the first steel waler 3; a second fixing plate is fixed on the side of the second steel support 10 near the second steel waler, and the second fixing plate is fixedly connected to the second steel waler; a plurality of third reinforcing ribs 9 are reinforced between the first steel support 4 and the first fixing plate 8; and a plurality of fourth reinforcing ribs are reinforced between the second steel support 10 and the second fixing plate.

[0026] The first type of steel waler 3 is made of angle steel with the horizontal part at the top and the vertical part welded to the first square steel plate 22. The second type of steel waler is made of angle steel with the horizontal part at the top and the vertical part welded to the second square steel plate.

[0027] The construction steps for the support device of the diaphragm wall 1 in the deep foundation pit are as follows:

[0028] Step 1: When the underground continuous wall 1 in the deep foundation pit is constructed to a certain height, the first transverse anchor bars 21 of multiple first embedded parts 2 and the second transverse anchor bars of the second embedded parts are evenly and equally spaced in the underground continuous wall 1, and the first square steel plate 22 and the second square steel plate of the first embedded parts 2 and the second embedded parts are exposed outside the underground continuous wall 1 and flush with the underground continuous wall 1.

[0029] Step 2: Bend the steel plate to form the first type of steel waler 3 and the second type of steel waler of the angle steel structure. Weld multiple first type of steel walers 3 to the first square steel plate 22 on the underground continuous wall 1. Similarly, weld multiple second type of steel walers to the second square steel plate on the other side of the underground continuous wall 1.

[0030] Step 3: First, prepare multiple steel cylinder structures, including the first steel support 4 and the second steel support 10, multiple first fixing plates 8 and the second fixing plates, multiple first flanges 5 and the second flanges 6, multiple first reinforcing ribs 7, second reinforcing ribs 11, third reinforcing ribs 9 and fourth reinforcing ribs.

[0031] One end of the first steel support 4 is welded to the first fixed plate 8, and the two are reinforced by multiple third reinforcing ribs 9. The other end of the first steel support 4 is welded to the first flange 5, and the two are reinforced by multiple first reinforcing ribs 7. Using the same method, one end of the second steel support 10 is welded to the second fixed plate, and the two are reinforced by multiple fourth reinforcing ribs. The other end of the second steel support 10 is welded to the second flange 6, and the two are reinforced by multiple second reinforcing ribs 11.

[0032] Step 4: Weld the first fixing plate 8 to the first steel waler 3, and similarly weld the second fixing plate to the second steel waler. When welding, pay attention to the relative position of the bolt holes on the first flange 5 and the second flange 6. The holes should be aligned. Then connect the corresponding first flange 5 and second flange 6 with anchor bolts.

[0033] Step 5: When the construction is completed and the support device needs to be removed, firstly, remove the first flange 5 and the second flange 6 using anchor bolts; secondly, use flame cutting to separate the first fixing plate 8 and the first steel waler 3, the second fixing plate 8 and the second steel waler, and then use a cutting machine or flame cutting to cut the first steel waler 3 and the second steel waler from the underground continuous wall 1; finally, grind the outer surfaces of the first square steel plate 22 and the second square steel plate smooth.

[0034] While specific embodiments of this utility model have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of this utility model is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of this utility model, but all such changes and modifications fall within the scope of protection of this utility model.

Claims

1. A support device for a diaphragm wall in a deep foundation pit, characterized in that, It includes a first embedded part embedded in a first diaphragm wall on the opposite side of the deep foundation pit and a second embedded part embedded in a second diaphragm wall, a first steel waler and a first steel support corresponding to the first embedded part, and a second steel waler and a second steel support corresponding to the second embedded part. The first embedded part is fixedly connected to the first steel waler, the first steel waler is fixedly connected to one side of the first steel support, and a first flange is fixed to the other side of the first steel support. The second embedded part is fixedly connected to the second steel waler, the second steel waler is fixedly connected to one side of the second steel support, and a second flange is fixed to the other side of the second steel support. The first flange is fixedly connected to the second flange.

2. The diaphragm wall support device in a deep foundation pit as described in claim 1, characterized in that, The first embedded part includes multiple first transverse anchor bars and a first square steel plate fixed to the multiple first transverse anchor bars. One end of the multiple first transverse anchor bars is fixed to the inner side of the first square steel plate. The outer side of the first square steel plate is flush with the outer surface of the first underground continuous wall. The first square steel plate is fixedly connected to the first steel waler. The second embedded part includes multiple second transverse anchor bars and a second square steel plate fixed to the multiple second transverse anchor bars. One end of the multiple second transverse anchor bars is fixed to the inner side of the second square steel plate. The outer side of the second square steel plate is flush with the outer surface of the second underground continuous wall. The second square steel plate is fixedly connected to the second steel waler.

3. The diaphragm wall support device in a deep foundation pit as described in claim 2, characterized in that, Multiple first transverse anchor bars are of equal length and evenly spaced, and multiple second transverse anchor bars are of equal length and evenly spaced.

4. The diaphragm wall support device in a deep foundation pit as described in claim 1, characterized in that, Both the first steel support and the second steel support are steel cylinder structures.

5. The diaphragm wall support device in a deep foundation pit as described in claim 4, characterized in that, A plurality of first reinforcing ribs are uniformly reinforced between the first steel support and the first flange along the circumferential direction, and a plurality of second reinforcing ribs are uniformly reinforced between the second steel support and the second flange along the circumferential direction.

6. The diaphragm wall support device in a deep foundation pit as described in claim 1, characterized in that, A first fixing plate is fixed to the side of the first steel support near the first steel waler, and the first fixing plate is fixedly connected to the first steel waler. A second fixing plate is fixed to the side of the second steel support near the second steel waler, and the second fixing plate is fixedly connected to the second steel waler.

7. The diaphragm wall support device in a deep foundation pit as described in claim 6, characterized in that, Multiple third reinforcing ribs are added between the first steel support and the first fixed plate, and multiple fourth reinforcing ribs are added between the second steel support and the second fixed plate.

8. The diaphragm wall support device in a deep foundation pit as described in claim 1, characterized in that, The first steel waler is made of angle steel with the horizontal part at the top and the vertical part welded to the first square steel plate. The second steel waler is also made of angle steel with the horizontal part at the top and the vertical part welded to the second square steel plate.

9. The diaphragm wall support device in a deep foundation pit as described in claim 1, characterized in that, The first flange is anchored to the second flange.

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