A foundation pit supporting device for subway station construction based on L-shaped diaphragm wall

Abstract

The application discloses a kind of based on L type ground connected wall subway station construction with foundation pit supporting device, belong to foundation pit supporting technical field.The foundation pit supporting device, including the base being arranged at the bottom of foundation pit and the column being fixedly connected with the base, further include: transverse supporting component, transverse supporting component is provided with multiple, and multiple transverse supporting components are symmetrically arranged on column, for supporting the inner wall of construction foundation pit;Pneumatic assembly, pneumatic assembly is arranged in column, for driving transverse supporting component to carry out supporting action.The present application sets up transverse supporting component and can realize the quick support and disassembly of device to foundation pit, facilitate to reduce the workload of staff, improve construction progress;And can be automatically adjusted according to the angle of inner wall of foundation pit, wide application range;While positioning component improves the stability of device, avoids its loosening, guarantees its supporting effect.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of foundation pit support, in particular to a foundation pit support device for subway station construction based on L-shaped diaphragm wall. BACKGROUND

[0002] The foundation construction of urban subway requires excavation of foundation pit, and the main structure construction such as platform is carried out after the completion of foundation pit construction. Foundation pit engineering mainly includes foundation pit support system design and construction and earth excavation, which is a very strong systematic engineering, and requires close cooperation of geotechnical engineering and structural engineering technical personnel. Foundation pit support is a support, reinforcement and protection measure used for foundation pit side wall and surrounding environment to ensure the safety of underground structure construction and surrounding environment. Foundation pit support engineering is a temporary engineering and is no longer needed after the completion of underground engineering construction.

[0003] The existing foundation pit support stabilizing device has the problems that on the one hand, it is difficult to ensure the stability of support, and the device is prone to deflection after long-term use, resulting in poor support effect; on the other hand, the existing support stabilizing device can only support the foundation pit with vertical inner wall, and cannot achieve support effect for the foundation pit with inclined side, resulting in that the application range of the existing device is too small, different support equipment needs to be used when facing different working environments, which greatly increases the use cost; and the existing support structure is generally connected by bolts, so that the installation and disassembly of the support structure are extremely inconvenient, the labor of workers is large, and the progress of engineering construction is seriously restricted. SUMMARY

[0004] The purpose of the present application is to solve the problems in the prior art and provide a foundation pit support device for subway station construction based on L-shaped diaphragm wall.

[0005] In order to achieve the above purpose, the present application adopts the following technical scheme:

[0006] A foundation pit support device for subway station construction based on L-shaped diaphragm wall, comprising a base arranged at the bottom of the foundation pit and a stand column fixedly connected with the base, further comprising:

[0007] A plurality of lateral support assemblies are symmetrically arranged on the stand column and used for supporting the inner wall of the foundation pit under construction.

[0008] A pneumatic assembly is arranged in the stand column and used for driving the lateral support assembly to perform a support action.

[0009] A limiting assembly is arranged on the lateral support assembly and used for limiting the support distance of the lateral support assembly.

[0010] A positioning assembly is arranged at the top of the column and used to fix the supporting position of the lateral supporting assembly.

[0011] Preferably, the lateral supporting assembly comprises a lateral pipe arranged on the column and in communication with the column, a fixing plate arranged in the lateral pipe, a first elastic element arranged on the fixing plate, a first piston arranged in the lateral pipe and connected to the first elastic element, a connecting plate arranged on the first piston, and a supporting plate movably connected to the connecting plate.

[0012] Preferably, the pneumatic assembly comprises a gas pump arranged on the base, a gas guide pipe arranged between the gas pump and the column, a second piston arranged in the column, and a second elastic element arranged between the second piston and the inner wall of the top of the column.

[0013] Preferably, the limiting assembly comprises a limiting frame arranged on the lateral pipe, a movable plate slidably connected to the limiting frame, a mounting plate arranged on the movable plate, a third elastic element arranged outside the movable plate, the two ends of the third elastic element connected to the limiting frame and the mounting plate respectively, a first rotating shaft arranged on the movable plate, a first torsion spring arranged between the first rotating shaft and the movable plate, a one-way clamping tooth arranged on the first rotating shaft, and a first rack plate arranged on the connecting plate and matched with the one-way clamping tooth.

[0014] Preferably, the positioning assembly comprises an ear plate arranged on the column, a second rotating shaft arranged on the ear plate, a driving gear arranged on the second rotating shaft, a second rack plate arranged on the second piston and engaged with the driving gear, an oscillating plate arranged on the second rotating shaft, and a second torsion spring arranged on the second rotating shaft and used to reset the oscillating plate.

[0015] Preferably, the movable plate is slidably connected to a sliding plate, the sliding plate is provided with a side plate, the fourth elastic element is arranged between the side plate and the sliding plate, and the oscillating plate is movably abutted against the sliding plate.

[0016] Preferably, the sliding plate is provided with a first extrusion inclined surface matched with the oscillating plate.

[0017] Preferably, the column is provided with a fixing rod, the fixing rod is provided with a fixing block at the end away from the column, the sliding plate is provided with a movable slot matched with the fixing block, and the movable slot is provided with a second extrusion inclined surface movably abutted against the fixing block.

[0018] Preferably, the number of the lateral supporting assemblies is not less than four, and the lateral supporting assemblies are symmetrically arranged on both sides of the column.

[0019] Preferably, the base and the support plate are provided with anti-skid patterns.

[0020] Compared with the prior art, the application provides a foundation pit supporting device for subway station construction based on an L-shaped diaphragm wall, which has the following beneficial effects:

[0021] 1. The foundation pit supporting device for subway station construction based on an L-shaped diaphragm wall can realize rapid supporting and dismounting of the device on the foundation pit through the transverse supporting assembly, thereby reducing the workload of the workers and improving the construction progress; and the device can be automatically adjusted according to the angle of the inner wall of the foundation pit, has a wide application range and high practicability.

[0022] 2. The foundation pit supporting device for subway station construction based on an L-shaped diaphragm wall improves the stability of the device when supporting the foundation pit through the positioning assembly, avoids loosening, and ensures the supporting effect.

[0023] 3. The foundation pit supporting device for subway station construction based on an L-shaped diaphragm wall can limit the supporting distance of the transverse supporting assembly through the limiting assembly, avoids the return of the connecting plate into the transverse pipe, and affects the supporting effect of the device on the inner wall of the foundation pit. DETAILED DESCRIPTION

[0024] Figure 1 It is a structural schematic diagram of the application;

[0025] Figure 2 It is a structural schematic diagram of the application; Figure 1 It is a partial enlarged structural schematic diagram of part A of the application;

[0026] Figure 3 It is a partial enlarged structural schematic diagram of part B of the application; Figure 1 It is a partial enlarged structural schematic diagram of part B of the application;

[0027] Figure 4 It is a sectional structural schematic diagram of the application;

[0028] Figure 5 It is a partial enlarged structural schematic diagram of part C of the application; Figure 4 It is a partial enlarged structural schematic diagram of part C of the application;

[0029] Figure 6 It is a structural schematic diagram of the sliding plate and the fixing block of the application; Figure 1 ;

[0030] Figure 7 It is a structural schematic diagram of the sliding plate and the fixing block of the application. Figure 2 .

[0031] In the figure: 1, base; 2, stand; 3, transverse support assembly; 4, pneumatic assembly; 5, limiting assembly; 6, transverse pipe; 601, fixed plate; 6011, first elastic element; 602, first piston; 603, connecting plate; 6031, first rack plate; 604, support plate; 7, air pump; 8, second piston; 801, second elastic element; 802, second rack plate; 9, movable plate; 901, mounting plate; 902, third elastic element; 903, first rotating shaft; 9031, one-way clamping tooth; 10, limiting frame; 11, positioning assembly; 111, ear plate; 112, second rotating shaft; 113, driving gear; 114, swing plate; 115, arc-shaped positioning rod; 12, sliding plate; 121, side plate; 122, fourth elastic element; 123, first extrusion inclined surface; 124, movable groove; 1241, second extrusion inclined surface; 13, fixed rod; 131, fixed block; 14, anti-skid pattern. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application.

[0033] Embodiment:

[0034] With reference to Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 , the present application is based on a foundation pit support device for subway station construction of L-shaped diaphragm wall, which comprises a base 1 arranged at the bottom of the foundation pit and a stand 2 fixedly connected with the base 1, and further comprises:

[0035] a plurality of transverse support assemblies 3, which are symmetrically arranged on the stand 2 and used for supporting the inner wall of the foundation pit under construction;

[0036] a pneumatic assembly 4 arranged in the stand 2 and used for driving the transverse support assembly 3 to perform a supporting action;

[0037] a limiting assembly 5 arranged on the transverse support assembly 3 and used for limiting the supporting distance of the transverse support assembly 3; and

[0038] a positioning assembly 11 arranged at the top of the stand 2 and used for fixing the supporting position of the transverse support assembly 3.

[0039] Specifically, when the device is used, the base 1 is placed at the bottom of the construction foundation pit, then the pneumatic assembly 4 is driven to operate, the pneumatic assembly 4 drives the lateral supporting assembly 3 to act, the lateral supporting assembly 3 is stretched and abuts against the inner wall of the foundation pit, and is automatically adjusted according to the angle of the inner wall of the foundation pit, the supporting distance of the lateral supporting assembly 3 is limited by the limiting assembly 5, so that the device is prevented from resetting and affecting the supporting effect on the foundation pit, and after the supporting action of the lateral supporting assembly 3 is completed, the positioning assembly 11 works, so that the positioning assembly 11 is in contact with the ground and is fixedly arranged between the positioning assembly 11 and the ground, the positioning effect of the supporting device is realized, and the foundation pit is prevented from loosening during supporting; the device can realize rapid supporting and dismounting of the foundation pit, the workload of the workers is reduced, and the construction progress is improved; the device can be automatically adjusted according to the angle of the inner wall of the foundation pit, has wide application range, the stability of the device is improved, the device is prevented from loosening, and the supporting effect is ensured.

[0040] With reference to Figure 4 and Figure 5 , as a preferred technical scheme of the present application, the lateral supporting assembly 3 comprises a lateral pipe 6 arranged on the stand column 2 and in communication with the stand column 2, a fixed plate 601 is arranged in the lateral pipe 6, a first elastic element 6011 is arranged on the fixed plate 601, one end of the first elastic element 6011 away from the fixed plate 601 is connected with a first piston 602 slidingly arranged in the lateral pipe 6, a connecting plate 603 is arranged on the first piston 602, and one end of the connecting plate 603 away from the first piston 602 is movably connected with a supporting plate 604; specifically, when the pneumatic assembly 4 works, air pushes the first piston 602 to move in the lateral pipe 6, the first piston 602 drives the supporting plate 604 to move towards the inner wall of the foundation pit and abut against the inner wall of the foundation pit through the connecting plate 603, so that the foundation pit is supported, and the first elastic element 6011 facilitates automatic resetting of the first piston 602.

[0041] With reference to Figure 1 , Figure 4 and Figure 5 , as a preferred technical scheme of the present application, the pneumatic assembly 4 comprises a gas pump 7 arranged on the base 1, the gas pump 7 is in communication with the stand column 2 through a gas guide pipe, a second piston 8 is arranged in the stand column 2, and a second elastic element 801 is arranged between the second piston 8 and the inner wall of the top of the stand column 2; specifically, the gas pump 7 is controlled to operate, air is introduced into the stand column 2 by the gas pump 7, the stiffness coefficient of the second elastic element 801 is greater than that of the first elastic element 6011, the air first acts on the first piston 602 connected with the first elastic element 6011, so that the first piston 602 moves and drives the supporting plate 604 to support the foundation pit through the connecting plate 603, after the supporting plate 604 abuts against the inner wall of the foundation pit, the first piston 602 cannot be continuously pushed, at this time, the air acts on the second piston 8, so that the second piston 8 is displaced.

[0042] With reference toFigure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5 , as a preferred technical scheme of the present application, the limiting assembly 5 comprises a limiting frame 10 arranged on the transverse pipe 6, a movable plate 9 is slidably connected in the limiting frame 10, the movable plate 9 is provided with a mounting plate 901, a third elastic element 902 is sleeved outside the movable plate 9, the two ends of the third elastic element 902 are connected with the limiting frame 10 and the mounting plate 901 respectively, a first rotating shaft 903 is arranged on the movable plate 9, a first torsional spring is arranged between the first rotating shaft 903 and the circumference of the movable plate 9, a one-way clamping tooth 9031 is arranged on the end of the first rotating shaft 903 away from the movable plate 9, and a first rack plate 6031 matched with the one-way clamping tooth 9031 is arranged on the connecting plate 603; specifically, when the connecting plate 603 drives the supporting plate 604 to move close to the inner wall of the foundation pit, the first rack plate 6031 on the connecting plate 603 abuts against the one-way clamping tooth 9031, so that the one-way clamping tooth 9031 drives the first rotating shaft 903 to rotate on the movable plate 9, and when the connecting plate 603 is retracted into the transverse pipe 6, the first rack plate 6031 abuts against the one-way clamping tooth 9031 to avoid resetting of the device, at this time, the one-way clamping tooth 9031 cannot drive the first rotating shaft 903 to reverse (a baffle is arranged on the first rotating shaft 903 to limit reverse rotation of the first rotating shaft 903), so that the connecting plate 603 drives the supporting plate 604 to keep abutting against the inner wall of the foundation pit, thereby ensuring the supporting effect on the foundation pit.

[0043] Referring to Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5 , as a preferred technical scheme of the present application, the positioning assembly 11 comprises an ear plate 111 arranged on the stand column 2, a second rotating shaft 112 is arranged on the ear plate 111, a driving gear 113 is arranged on the second rotating shaft 112, a second rack plate 802 engagedly connected with the driving gear 113 is arranged on the second piston 8, a swing plate 114 is arranged on the second rotating shaft 112, a second torsional spring for resetting rotation of the swing plate 114 is further sleeved on the second rotating shaft 112, and an arc-shaped positioning rod 115 is connected to the end of the swing plate 114 away from the second rotating shaft 112; specifically, after the supporting action of the transverse supporting assembly 3 is completed, the supporting plate 604 abuts against the inner wall of the foundation pit, and the first piston 602 cannot be continuously pushed, at this time, the air force acts on the second piston 8, so that the second piston 8 drives the second rack plate 802 to move upwards, the second rack plate 802 is engaged with the driving gear 113, the driving gear 113 drives the swing plate 114 to swing through the second rotating shaft 112, so that the arc-shaped positioning rod 115 at the other end of the swing plate 114 is inserted into the soil of the ground with the second rotating shaft 112 as the center, thereby realizing positioning of the supporting device, avoiding loosening during supporting of the foundation pit, and improving the stability of installation of the device.

[0044] With reference to Figure 1 , Figure 6 and Figure 7 , as a preferred technical solution of the present application, the sliding plate 9 is slidably connected with a sliding plate 12, the sliding plate 12 is provided with a side plate 121, the fourth elastic element 122 is arranged between the side plate 121 and the sliding plate 12, and the swing plate 114 is in movable abutment with the sliding plate 12.

[0045] Further, the sliding plate 12 is provided with a first extrusion inclined surface 123 matched with the swing plate 114.

[0046] Further, the outer side of the stand column 2 is provided with a fixed rod 13, the fixed rod 13 is provided with a fixed block 131 at the end away from the stand column 2, the sliding plate 12 is provided with a movable groove 124 matched with the fixed block 131, and the movable groove 124 is provided with a second extrusion inclined surface 1241 in movable abutment with the fixed block 131.

[0047] Specifically, when the swing plate 114 drives the arc-shaped positioning rod 115 to insert into the soil of the ground, the swing plate 114 abuts against the first extrusion inclined surface 123 on the sliding plate 12, so that the sliding plate 12 slides on the movable plate 9, and the fourth elastic element 122 is stretched. With the rotation of the swing plate 114, the swing plate 114 moves to the lower side of the sliding plate 12, and the sliding plate 12 is reset under the elastic force of the fourth elastic element 122. When it is necessary to disassemble the supporting device, the swing plate 114 is reset and rotates upward. In this process, the swing plate 114 drives the movable plate 9 to move upward through the sliding plate 12, so that the one-way clamping teeth 9031 connected to the outer side of the movable plate 9 no longer resist the first rack plate 6031. At this time, the first piston 602 can be reset under the pulling of the first elastic element 6011, and the connecting plate 603 is retracted into the transverse pipe 6. When the movable plate 9 moves upward to a certain height, the fixed block 131 is in the movable groove 124 and abuts against the second extrusion inclined surface 1241, so that the sliding plate 12 slides horizontally on the movable plate 9. The sliding plate 12 no longer abuts against the swing plate 114. After the swing plate 114 passes the sliding plate 12, the sliding plate 12 is reset and moves downward under the elastic force of the third elastic element 902, thereby preparing for subsequent supporting work. The operation is simple, and the staff does not need to participate, thereby reducing the workload of the staff and improving the disassembly speed of the device.

[0048] With reference to Figure 1 and Figure 4 , as a preferred technical solution of the present application, the number of the transverse supporting assemblies 3 is not less than four, and the transverse supporting assemblies 3 are symmetrically installed on both sides of the stand column 2. Specifically, the transverse supporting assemblies 3 ensure the supporting effect of the foundation pit.

[0049] With reference to Figure 1 , as a preferred technical solution of the present application, the base 1 and the supporting plate 604 are both provided with anti-skid lines 14. Specifically, the anti-skid lines 14 improve the anti-skid ability of the supporting device and the stability of the device installation.

[0050] Specifically, when the device is used, the base 1 is placed at the bottom of the construction foundation pit, and then the pneumatic assembly 4 is driven to operate, so that the pneumatic assembly 4 drives the transverse support assembly 3 to act, and the air pump 7 introduces air into the stand column 2. The stiffness coefficient of the second elastic element 801 is greater than that of the first elastic element 6011. These air first acts on the first piston 602 connected with the first elastic element 6011, so that the first piston 602 moves and drives the support plate 604 to support the foundation pit through the connecting plate 603. The support plate 604 abuts against the inner wall of the foundation pit, and the placement angle of the support plate 604 can be automatically adjusted according to the angle of the inner wall of the foundation pit. The one-way clamping tooth 9031 limits the first rack plate 6031 to avoid the device resetting. When the first piston 602 cannot be continuously pushed, the air acts on the second piston 8 at this time, so that the second piston 8 is displaced, the second piston 8 drives the second rack plate 802 to move upwards, the second rack plate 802 is engaged with the driving gear 113, the driving gear 113 drives the swing plate 114 to swing through the second shaft 112, so that the arc-shaped positioning rod 115 at the other end of the swing plate 114 is inserted into the soil in the ground with the second shaft 112 as the center, realizing the positioning of the support device, avoiding loosening when supporting the foundation pit, and improving the stability of the device installation. When it is necessary to disassemble the support device, the swing plate 114 is reset to rotate upwards. In this process, the swing plate 114 drives the movable plate 9 to move upwards through the sliding plate 12, so that the one-way clamping tooth 9031 connected to the outside of the movable plate 9 no longer blocks the first rack plate 6031. At this time, the first piston 602 can be reset under the pulling of the first elastic element 6011. The connecting plate 603 is retracted into the transverse pipe 6. When the movable plate 9 moves to a certain height, the fixed block 131 is in the active groove 124 and abuts against the second extrusion inclined surface 1241, so that the sliding plate 12 slides transversely on the movable plate 9. The sliding plate 12 no longer abuts against the swing plate 114. After the swing plate 114 passes the sliding plate 12, the sliding plate 12 is reset and moves downward under the elastic force of the third elastic element 902, preparing for the subsequent support work. The operation is simple, without the need for workers to participate, reducing the workload of workers and improving the disassembly speed of the device.

Claims

1. A foundation pit supporting device for subway station construction based on L-type diaphragm wall, comprising a base (1) arranged at the bottom of the foundation pit and a stand (2) fixedly connected with the base (1), characterized in that, Also include: The lateral support assembly (3) is provided with a plurality of, and a plurality of the lateral support assembly (3) is symmetrically arranged on the column (2), which is used for supporting the inner wall of the foundation pit under construction; The pneumatic assembly (4) is arranged in the column (2), which is used for driving the lateral support assembly (3) to support the action; The limiting assembly (5) is arranged on the lateral support assembly (3), which is used for limiting the support distance of the lateral support assembly (3); and The positioning assembly (11) is arranged on the top of the column (2), which is used for fixing the support position of the lateral support assembly (3); The lateral support assembly (3) includes a lateral pipe (6) arranged on the column (2) and communicated with the column (2), a fixing plate (601) arranged in the lateral pipe (6), a first elastic element (6011) arranged on the fixing plate (601), a first piston (602) slidably arranged in the lateral pipe (6) and connected to the end of the first elastic element (6011) away from the fixing plate (601), a connecting plate (603) arranged on the first piston (602), and a support plate (604) movably connected to the end of the connecting plate (603) away from the first piston (602); The column (2) is provided with a second piston (8), and a second elastic element (801) is arranged between the second piston (8) and the inner wall of the top of the column (2); the stiffness coefficient of the second elastic element (801) is greater than that of the first elastic element (6011); The positioning assembly (11) includes an ear plate (111) arranged on the column (2), a second rotating shaft (112) arranged on the ear plate (111), a driving gear (113) arranged on the second rotating shaft (112), a second rack plate (802) arranged on the second piston (8) and engaged with the driving gear (113), an oscillating plate (114) arranged on the second rotating shaft (112), and a second torsional spring arranged on the second rotating shaft (112) for resetting the rotation of the oscillating plate (114), and an arc-shaped positioning rod (115) connected to the end of the oscillating plate (114) away from the second rotating shaft (112).

2. The foundation pit supporting device for constructing a subway station based on the L-type diaphragm wall according to claim 1, characterized in that, The pneumatic assembly (4) includes a gas pump (7) arranged on the base (1), and the gas pump (7) is communicated with the column (2) through a gas guide pipe.

3. The foundation pit supporting device for constructing a subway station based on the L-type diaphragm wall according to claim 2, characterized in that, The limiting assembly (5) comprises a limiting frame (10) arranged on the transverse pipe (6), a movable plate (9) is slidably connected in the limiting frame (10), the movable plate (9) is provided with a mounting plate (901), a third elastic element (902) is arranged outside the movable plate (9), the two ends of the third elastic element (902) are connected with the limiting frame (10) and the mounting plate (901) respectively, a first rotating shaft (903) is arranged on the movable plate (9), a first torsional spring is arranged between the first rotating shaft (903) and the movable plate (9) in the circumferential direction, a one-way clamping tooth (9031) is arranged at the end of the first rotating shaft (903) away from the movable plate (9), and the connecting plate (603) is provided with a first rack plate (6031) matched with the one-way clamping tooth (9031).

4. The foundation pit supporting device for constructing a subway station based on the L-type diaphragm wall according to claim 3, characterized in that, The movable plate (9) is slidably connected with a sliding plate (12), the sliding plate (12) is provided with a side plate (121), a fourth elastic element (122) is arranged between the side plate (121) and the sliding plate (12), and the swinging plate (114) is in movable abutment with the sliding plate (12).

5. The foundation pit support device for constructing a subway station based on the L-type diaphragm wall according to claim 4, characterized in that, The sliding plate (12) is provided with a first extrusion inclined surface (123) matched with the swinging plate (114).

6. The foundation pit supporting device for constructing a subway station based on the L-type diaphragm wall according to claim 5, characterized in that, The outer side of the stand column (2) is provided with a fixing rod (13), one end of the fixing rod (13) away from the stand column (2) is provided with a fixing block (131), the sliding plate (12) is provided with a movable groove (124) matched with the fixing block (131), and the movable groove (124) is provided with a second extrusion inclined surface (1241) in movable abutment with the fixing block (131).

7. The foundation pit supporting device for constructing a subway station based on the L-type diaphragm wall according to claim 1, characterized in that, The number of the transverse support assemblies (3) is not less than four, and the transverse support assemblies (3) are symmetrically arranged on the two sides of the stand column (2).

8. The foundation pit supporting device for constructing a subway station based on the L-type diaphragm wall according to claim 1, wherein The base (1) and the support plate (604) are provided with anti-skid lines (14).

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