Subway station deep foundation pit composite supporting structure

Abstract

The utility model discloses a composite supporting structure for a deep foundation pit of a subway station, which belongs to the technical field of building construction and is characterized in that a reinforcing bottom plate is fastened on the surface of the foundation pit ground through expansion bolts, concrete walls are arranged on the surfaces of the foundation pit ground and the reinforcing bottom plate, and supporting upright posts are fixedly welded on the surface of the reinforcing bottom plate. The subway station deep foundation pit combined type supporting structure comprises a concrete wall body, a supporting stand column is arranged on the concrete wall body, a through hole is formed in the side face of the supporting stand column, a pull rod is slidably connected to the inner wall of the through hole in a sleeved mode, and the supporting stand column and the pull rod are both bonded with the concrete wall body into a whole. Meanwhile, the supporting firmness of the supporting stand column is improved, the height and the inclination angle of the supporting end of the supporting stand column can be adjusted through the adjusting rod, the adjusting sleeve and the supporting plate, meanwhile, the supporting area of the supporting stand column and the top of the deep foundation pit is increased, and use convenience and supporting safety are greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of building construction technology, and more specifically, to a composite support structure for deep foundation pits in subway stations. Background Technology

[0002] During the construction of subway stations, support structures are needed to support the deep foundation pits of the subway stations. However, common composite support structures usually include walls and steel columns. However, once the steel columns are fixed to the walls, the support angle and height cannot be adjusted. At the same time, the support may be less robust and safe due to insufficient strength of the walls.

[0003] For example, CN212104118U discloses a composite support structure for deep foundation pits in subway stations, which includes a deep foundation pit ground surface, a foundation, a cement wall underground soil, cement, reinforcing bars, and channel steel columns; the foundation is fixed to the top of the deep foundation pit ground surface, the cement wall is fixed to the top of the foundation, the reinforcing bars are deeply embedded in the interior of the left and right sides of the cement wall, and the channel steel columns are deeply embedded in the top of the cement wall.

[0004] As can be seen from the above-mentioned publicly available scheme, the cement wall is poured together with underground soil and cement and adhesive. At the same time, the connection area with the channel steel column is small, which may reduce the support strength of the cement wall and the support stability of the channel steel column. Furthermore, when the channel steel column bonded to the cement wall supports the top of the deep foundation pit, the support height cannot be adjusted, which not only results in a small support area, but also means that the support is used when the top of the deep foundation pit descends, which cannot guarantee its support safety. Utility Model Content

[0005] To address the problems existing in the prior art, the purpose of this utility model is to provide a composite support structure for deep foundation pits in subway stations. This composite support structure for deep foundation pits in subway stations, through supporting columns, reinforced base plates, and tie rods, can not only greatly increase the support strength of the concrete walls, but also improve the support stability of the supporting columns. Furthermore, through the setting of adjusting rods, adjusting sleeves, and supporting plates, the height and tilt angle of the supporting column support ends can be adjusted, while increasing the support area with the top of the deep foundation pit, greatly improving the convenience of use and the safety of support.

[0006] To solve the above problems, the present invention adopts the following technical solution.

[0007] A composite support structure for deep foundation pits in subway stations includes a pit floor. A reinforcing base plate is fastened to the surface of the pit floor using expansion bolts. Concrete walls are formed on the surfaces of the pit floor and the reinforcing base plate. Support columns are fixedly welded to the surface of the reinforcing base plate. Each support column has a through hole on its side, and a tie rod is slidably fitted onto the inner wall of the through hole. Both the support column and the tie rod are integrally bonded to the concrete wall. An adjusting rod is movably fitted to one end of each support column. An adjusting sleeve is threaded onto the surface of the adjusting rod, and one end of the adjusting rod is fixedly connected to... The shaft seat has a shaft rod on its inner side, and a connecting block is rotatably connected to the surface of the shaft rod. One end of the connecting block is fixedly connected to a support plate. This composite support structure for deep foundation pits in subway stations can greatly increase the support strength of concrete walls through support columns, reinforced base plates, and tie rods. It can also improve the support stability of the support columns. Furthermore, the height and tilt angle of the support column support end can be adjusted through the setting of adjustment rods, adjustment sleeves, and support plates, while increasing the support area with the top of the deep foundation pit, greatly improving the convenience of use and the safety of support.

[0008] Furthermore, one end of the support column is provided with an adjustment hole, one end of the adjustment rod is located in the adjustment hole, the inner diameter of the adjustment hole is larger than the outer diameter of the adjustment rod, the surface of the adjustment rod is provided with external threads, and the adjustment hole facilitates the manual quick installation and removal of the adjustment rod.

[0009] Furthermore, the side of the supporting column is provided with two radially symmetrical diagonal bracing plates. The bottom of the diagonal bracing plates is fixedly welded to the surface of the reinforcing base plate. Both the diagonal bracing plates and the reinforcing base plate are made of steel plates. The diagonal bracing plates and the reinforcing base plate can increase the support strength and support stability of the bottom of the supporting column.

[0010] Furthermore, the center of the adjusting sleeve is provided with a threaded hole that matches the external thread of the adjusting rod, and the side of the adjusting sleeve is provided with annularly spaced striking blocks, which facilitates the user to rotate the adjusting sleeve by striking the striking blocks with a hammer.

[0011] Furthermore, the through holes are equidistantly distributed along the height direction of the support column, and the number of through holes provided in each support column is the same as the number of tie rods, which facilitates the quick positioning and connection of the tie rods.

[0012] Furthermore, the tie rod is made of threaded steel bars and is positioned by binding it to the surface of the support column with iron wire, thereby increasing the support strength of the concrete wall.

[0013] Furthermore, the supporting surface of the support plate is a flat or curved surface, which can increase the contact area with the top of the deep foundation pit.

[0014] Compared with existing technologies, the advantages of this utility model are:

[0015] (1) This solution can not only greatly increase the support strength of the concrete wall by supporting columns, strengthening the base plate and tie rods, but also improve the support stability of the supporting columns.

[0016] (2) This scheme can adjust the height and tilt angle of the support column by setting the adjustment rod, adjustment sleeve and support plate, and at the same time increase the support area with the top of the deep foundation pit, which greatly improves the convenience of use and the safety of support. Attached Figure Description

[0017] Figure 1 This is a three-dimensional view of the overall structure of this utility model;

[0018] Figure 2 This is a side view of the mounting structure of the supporting column and the reinforced base plate of this utility model;

[0019] Figure 3 This is a three-dimensional view of the supporting column and supporting plate structure of this utility model;

[0020] Figure 4 This is a perspective view of the overall structure of the adjusting rod of this utility model;

[0021] Figure 5 for Figure 3 A top view of the supporting column structure.

[0022] Explanation of the labels in the diagram:

[0023] 1. Excavation pit ground, 2. Reinforced base plate, 21. Expansion bolt, 3. Support column, 31. Through hole, 32. Diagonal brace plate, 33. Tie rod, 34. Adjustment hole, 4. Adjustment rod, 41. Adjustment sleeve, 42. Impact block, 43. Shaft seat, 44. Shaft rod, 5. Support plate, 51. Connecting block, 6. Concrete wall. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Example 1

[0026] Please see Figure 1-5A composite support structure for deep foundation pits in subway stations includes a pit floor 1. A reinforcing base plate 2 is fastened to the surface of the pit floor 1 using expansion bolts 21. Concrete walls 6 are provided on the surfaces of the pit floor 1 and the reinforcing base plate 2. Supporting columns 3 are fixedly welded to the surface of the reinforcing base plate 2. The supporting columns 3 are arranged in an array, belonging to existing technology, and are made of steel columns. Through holes 31 are provided on the sides of the supporting columns 3. Tie rods 33 are slidably sleeved on the inner walls of the through holes 31. The tie rods 33 are made of threaded steel bars and are tied and positioned to the surface of the supporting columns 3 by wire. The tie rods 33 increase the support strength of the concrete wall 6. Both the supporting columns 3 and the tie rods 33 are attached to the concrete wall. The body 6 is bonded as one piece. One end of the support column 3 is movably sleeved with an adjusting rod 4. The surface of the adjusting rod 4 is connected to an adjusting sleeve 41 by a thread. The adjusting sleeve 41 can be adjusted in position on the surface of the adjusting rod 4 by the thread, thereby supporting one end of the support column 3 and adjusting the lifting height of the other end support plate 5. This facilitates the contact and compression between the support plate 5 and the top of the deep foundation pit for support. One end of the adjusting rod 4 is fixedly connected to a bearing 43. The inner side of the bearing 43 is provided with a shaft 44. The surface of the shaft 44 is rotatably connected to a connecting block 51. One end of the connecting block 51 is fixedly connected to a support plate 5. The support surface of the support plate 5 is a flat or arc-shaped surface, which can increase the contact area with the top of the deep foundation pit.

[0027] One end of the support column 3 is provided with an adjustment hole 34, and one end of the adjustment rod 4 is located inside the adjustment hole 34. The inner diameter of the adjustment hole 34 is larger than the outer diameter of the adjustment rod 4. The surface of the adjustment rod 4 is provided with external threads. The adjustment hole 34 facilitates the manual and quick installation and removal of the adjustment rod 4. The side of the support column 3 is provided with two radially symmetrical diagonal bracing plates 32. The bottom of the diagonal bracing plates 32 is fixedly welded to the surface of the reinforcing base plate 2. Both the diagonal bracing plates 32 and the reinforcing base plate 2 are made of steel plates. The diagonal bracing plates 32 and the reinforcing base plate 2 can increase the support strength and support stability of the bottom of the support column 3.

[0028] The center of the adjusting sleeve 41 is provided with a threaded hole that matches the external thread of the adjusting rod 4. The side of the adjusting sleeve 41 is provided with annularly distributed striking blocks 42, which makes it easy for the user to rotate the adjusting sleeve 41 by striking the striking blocks 42 with a hammer. The through holes 31 are distributed at equal intervals along the height direction of the support column 3. The number of through holes 31 provided in each support column 3 is the same as the number of pull rods 33, which facilitates the quick positioning and connection of the pull rods 33.

[0029] During the construction of the composite support structure for the deep foundation pit of this subway station, the reinforced base plate 2 is first fixed. Then, the support columns 3 and diagonal bracing plates 32 are welded to the surface of the reinforced base plate 2. Next, tie rods 33 are inserted and tied to the surface of the support columns 3. Then, a concrete wall 6 is poured and formed using wall formwork and concrete grout. After the concrete wall 6 has completely solidified, the adjusting rod 4 connected to the support plate 5 is inserted into the top of the support column 3. Then, the support plate 5 is brought into contact with the top of the deep foundation pit for support. At the same time, the adjusting sleeve 41 is rotated clockwise or counterclockwise to adjust the position of the support. The sleeve 41 contacts and presses against one end of the support column 3, causing the support column 3 and the support plate 5 to bear the downward pressure from the top of the deep foundation pit, thereby supporting them. The support column 3, the reinforced base plate 2 and the tie rod 33 can not only greatly increase the support strength of the concrete wall 6, but also improve the support stability of the support column 3. Furthermore, the height and tilt angle of the support end of the support column 3 can be adjusted by the adjustable rod 4, the adjustable sleeve 41 and the support plate 5, while increasing the support area with the top of the deep foundation pit, which greatly improves the convenience of use and the safety of support.

[0030] The above description is merely a preferred embodiment of this utility model; however, the protection scope of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and its improved concept, should be included within the protection scope of this utility model.

Claims

1. A composite support structure for deep foundation pits in subway stations, comprising the foundation pit ground (1), characterized in that: The surface of the pit floor (1) is fastened to the reinforcing base plate (2) by expansion bolts (21). The surface of the pit floor (1) and the reinforcing base plate (2) is provided with concrete walls (6). The surface of the reinforcing base plate (2) is fixedly welded with a support column (3). The side of the support column (3) is provided with a through hole (31). The inner wall of the through hole (31) is slidably sleeved with a tie rod (33). The support column (3) and the tie rod (33) are both bonded to the concrete wall (6). One end of the support column (3) is movably sleeved with an adjusting rod (4). The surface of the adjusting rod (4) is connected with an adjusting sleeve (41) by a thread. One end of the adjusting rod (4) is fixedly connected with a bearing seat (43). The inner side of the bearing seat (43) is provided with a shaft rod (44). The surface of the shaft rod (44) is rotatably connected with a connecting block (51). One end of the connecting block (51) is fixedly connected with a support plate (5).

2. The composite support structure for deep foundation pits in subway stations according to claim 1, characterized in that: One end of the support column (3) is provided with an adjustment hole (34), and one end of the adjustment rod (4) is located inside the adjustment hole (34). The inner diameter of the adjustment hole (34) is larger than the outer diameter of the adjustment rod (4), and the surface of the adjustment rod (4) is provided with an external thread.

3. The composite support structure for deep foundation pits in subway stations according to claim 1, characterized in that: The side of the supporting column (3) is provided with two radially symmetrical diagonal bracing plates (32). The bottom of the diagonal bracing plates (32) is fixedly welded to the surface of the reinforcing base plate (2). Both the diagonal bracing plates (32) and the reinforcing base plate (2) are made of steel plates.

4. The composite support structure for deep foundation pits in subway stations according to claim 1, characterized in that: The center of the adjusting sleeve (41) is provided with a threaded hole that matches the external thread of the adjusting rod (4), and the side of the adjusting sleeve (41) is provided with annularly spaced striking blocks (42).

5. A composite support structure for deep foundation pits in subway stations according to claim 1, characterized in that: The through holes (31) are equidistantly distributed along the height direction of the support column (3), and the number of through holes (31) provided in each support column (3) is the same as the number of tie rods (33).

6. A composite support structure for deep foundation pits in subway stations according to claim 1, characterized in that: The tie rod (33) is made of threaded steel bar and is positioned by binding the tie rod (3) to the surface of the support column (3) with iron wire.

7. A composite support structure for deep foundation pits in subway stations according to claim 1, characterized in that: The support surface of the support plate (5) is a plane or an arc-shaped surface.

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