Subway tunnel foundation pit supporting device

Abstract

The utility model discloses a subway tunnel foundation pit supporting device, and relates to the technical field of foundation pit supporting, the subway tunnel foundation pit supporting device comprises a supporting frame fixedly installed in the middle of the interior of a tunnel foundation pit, moving grooves are formed in the two sides of the supporting frame in a penetrating mode, and a plurality of telescopic supporting structures are slidably connected in the moving grooves; buffering supporting structures are fixed to the two ends of each telescopic supporting structure and make contact with the two sides of the tunnel foundation pit for supporting, an auxiliary adjusting structure is fixed to the front portion of the supporting frame, and the auxiliary adjusting structure is matched with the multiple telescopic supporting structures to adjust the height position. Each telescopic supporting structure is driven by the auxiliary adjusting structure to move in the corresponding moving groove to adjust the height, then the telescopic supporting structures are controlled to stretch out, and therefore the buffering supporting structures on the two sides make contact with formworks on the two sides of the tunnel foundation pit for supporting, the auxiliary adjusting structures assist the telescopic supporting structures to adjust the height relatively conveniently, and manpower loss is reduced; and along with thickening of the delayed coagulation soil on the two sides of the tunnel foundation pit, the device can still continue to carry out supporting work, and rebuilding is not needed.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of foundation pit support, especially relates to subway tunnel foundation pit support device. BACKGROUND

[0002] The subway tunnel foundation pit is a temporary pit excavated for subway station or line construction. Its main role is to provide a working surface for subway construction and ensure the smooth progress of construction. The construction method of foundation pit is various, including slope excavation, enclosure structure construction, earth excavation, etc. The specific selection depends on geological conditions and surrounding environment. The subway tunnel foundation pit support is a support, reinforcement and protection measure taken to ensure the safety of underground structure construction and the surrounding environment of foundation pit. Among them, the reinforced concrete support of foundation pit is an important structure in the subway tunnel foundation pit support, which is used to balance the horizontal force outside the enclosure wall.

[0003] After the foundation pit is excavated to a certain depth, according to the design requirements, steel bars are erected between the underground continuous wall or enclosure structure on both sides and tied into the shape of support beam. Then, concrete pouring is carried out. The concrete is injected into the tied steel reinforcement framework by pumping or other ways to form reinforced concrete support. During the process of reinforced concrete pouring and molding, the support device is needed to support and protect the module to ensure the reinforced concrete pouring and molding.

[0004] At present, the template support for traditional tunnel reinforced concrete pouring and molding adopts manual erection of support, and then manual hydraulic cylinder is installed on the support frame. The template is supported by the extension of the up and down hydraulic cylinders. However, the traditional support device has great limitations in adjusting height and adapting to different foundation pit sizes. Construction personnel usually need to spend a lot of time and effort to erect and adjust the support to meet the needs of foundation pit support. Such complicated operation not only reduces the construction efficiency, but also increases the labor loss and cost expenditure. At the same time, the traditional support device also faces many difficulties in disassembly. Because the support structure is complex and closely connected, a lot of time and effort is needed to disassemble, and even the support device or foundation pit template may be damaged, which brings inconvenience to subsequent construction.

[0005] Therefore, it is necessary to design a subway tunnel foundation pit support device which is convenient to adjust and install to solve the problem. Utility model content

[0006] The utility model provides subway tunnel foundation pit support device, solves the technical problem proposed above.

[0007] The utility model provides a subway tunnel foundation pit support device, including the support frame of fixed installation in the middle part of tunnel foundation pit, the mobile groove is set up in the both sides of support frame and penetrates, mobile groove inside is connected with a plurality of groups of telescopic support structure of sliding, every group telescopic support structure both ends are fixed with buffer support structure and tunnel foundation pit both side contact support, the front part of support frame is fixed with auxiliary adjusting structure, and auxiliary adjusting structure and a plurality of groups of telescopic support structure cooperate and adjust height position.

[0008] Preferably, the tunnel foundation pit is provided with a formwork on both sides, the formwork is poured with concrete, and the plurality of telescopic support structures are extended through the buffer support structures to contact and support the formwork on both sides of the tunnel foundation pit.

[0009] Preferably, the telescopic support structure comprises a connecting seat slidably installed in the mobile groove of the support frame, a buffer structure is fixed to the top of the connecting seat, and two support hydraulic cylinders are symmetrically fixed to the both sides of the connecting seat, and the opposite telescopic ends of the two support hydraulic cylinders are fixedly connected with the buffer support structures.

[0010] Preferably, the buffer structure comprises a buffer rubber frame fixed to the top of the connecting seat, and a buffer spring I is fixed in the buffer rubber frame.

[0011] Preferably, the buffer support structure comprises a connecting plate fixed to the telescopic end of the support hydraulic cylinder, a plurality of buffer springs II are fixed to the outer end of the connecting plate, and a support plate is fixedly connected with the plurality of buffer springs II.

[0012] Preferably, the auxiliary adjusting structure comprises a plurality of hydraulic cylinders fixedly connected with the support frame, a U-shaped frame is fixed to the top of the plurality of hydraulic cylinders, a plurality of communication insertion grooves are formed in the U-shaped frame, and an auxiliary support is inserted into each communication insertion groove.

[0013] Preferably, the auxiliary support can be displaced to contact with a telescopic support structure on both sides of the support frame through the communication insertion groove.

[0014] Preferably, the plurality of support hydraulic cylinders and the plurality of hydraulic cylinders are connected with an external hydraulic pump station through a hose for oil supply.

[0015] Compared with the related art, the utility model provides the subway tunnel foundation pit support device with the following beneficial effects:

[0016] The utility model provides, through auxiliary adjusting structure to drive every group telescopic support structure moves in mobile groove and adjusts height, then controls telescopic support structure to stretch out, so that the buffer support structures on both sides contact and support the formwork on both sides of the tunnel foundation pit, the device is convenient for adjusting height of a plurality of groups of telescopic support structures through auxiliary adjusting structure, reduces the manpower loss, and as the two sides of the tunnel foundation pit are thickened with the slow setting concrete, the device can still continue to support, without the need to rebuild.

[0017] The utility model provides, through auxiliary adjusting structure, the extension length of accurate control of multiple hydraulic cylinder of external hydraulic pump station, construction personnel can very accurate adjusting height of auxiliary support and support hydraulic cylinder, and further realize the fine adjustment of telescopic support structure. This kind of adjusting mode not only improves construction accuracy, but also greatly shortens the time required for adjusting, improves the overall construction efficiency.

[0018] The utility model provides, install buffer structure on every group telescopic support structure, when telescopic support structure is in the moving groove and moves down and contacts and collides with another telescopic support structure, connecting seat and buffer rubber frame contact extrusion and buffer, and buffer rubber frame installs buffer spring no. 1 in, buffer rubber frame extrusion deformation drives buffer spring no. 1 contraction rebound, realize further buffer, effectively prevent the contact collision between the multiple telescopic support structure, improve security. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is the schematic diagram for the subway tunnel foundation pit support device of the utility model;

[0020] Figure 2 It is the three-dimensional schematic diagram for the subway tunnel foundation pit support device of the utility model;

[0021] Figure 3 It is the schematic diagram for telescopic support structure of the utility model;

[0022] Figure 4 It is the schematic diagram for auxiliary adjusting structure of the utility model.

[0023] Marked number in the drawing: 1, support frame;11, moving groove;2, telescopic support structure;21, support hydraulic cylinder;22, connecting seat;23, buffer structure;231, buffer rubber frame;232, buffer spring no. 1;3, buffer support structure;31, buffer spring no. 2;32, connecting plate;33, support plate;4, auxiliary adjusting structure;41, multiple hydraulic cylinder;42, U-shaped frame;43, communication slot;44, auxiliary support;5, tunnel foundation pit. DETAILED DESCRIPTION

[0024] Example one, by Figures 1-4 Give, subway tunnel foundation pit support device, including the support frame 1 of fixed installation in the middle part of tunnel foundation pit 5, the moving groove 11 is opened in the both sides of support frame 1 and is slidably connected with multiple telescopic support structures 2 in moving groove 11, and each telescopic support structure 2 is fixed with buffer support structure 3 at both ends and contacts and supports with the both sides of tunnel foundation pit 5, the auxiliary adjusting structure 4 is fixed in the front of support frame 1, and auxiliary adjusting structure 4 and multiple telescopic support structures 2 cooperate and adjust height position.

[0025] Specifically, when the templates on both sides of the tunnel foundation pit 5 are built to pour the slow-setting concrete, the device is installed in the middle of the tunnel foundation pit 5 for support, the support frame 1 is fixedly installed in the middle of the tunnel foundation pit 5, a plurality of telescopic support structures 2 are arranged in the moving groove 11 and driven by the auxiliary adjusting structure 4, each telescopic support structure 2 is adjusted in height in the moving groove 11, and then the telescopic support structure 2 is controlled to extend, so that the buffer support structures 3 on both sides are in contact with the templates on both sides of the tunnel foundation pit 5 for support. The device is convenient for the relative height adjustment of the plurality of telescopic support structures 2 by the auxiliary adjusting structure 4, reduces the labor loss, and can still continue to support as the slow-setting concrete on both sides of the tunnel foundation pit 5 thickens, without the need to rebuild.

[0026] In the embodiment, the telescopic support structure 2 comprises a connecting seat 22 slidingly installed in the moving groove 11 of the support frame 1, a buffer structure 23 fixed to the top of the connecting seat 22, and two support hydraulic cylinders 21 fixed to the two sides of the connecting seat 22, and the opposite telescopic ends of the two support hydraulic cylinders 21 are fixedly connected with the buffer support structures 3.

[0027] Specifically, when the height of the telescopic support structure 2 is adjusted by the auxiliary adjusting structure 4, the auxiliary adjusting structure 4 is in contact with the two support hydraulic cylinders 21 to lift them, the connecting seat 22 moves in the moving groove 11, and the two support hydraulic cylinders 21 are moved to a suitable height. When supporting, the external hydraulic pump is controlled to stop sending liquid to the plurality of hydraulic cylinders 41, and then sends liquid to the two support hydraulic cylinders 21. The two support hydraulic cylinders 21 extend, and the buffer structures 23 on both sides are in contact with the templates on both sides of the tunnel foundation pit 5 for support. The plurality of telescopic support structures 2 are operated and adjusted to a suitable height for foundation pit support. The operation is simple, the construction efficiency is high, and the labor is reduced.

[0028] In the embodiment, the buffer support structure 3 comprises a connecting plate 32 fixed to the telescopic end of the support hydraulic cylinder 21, a plurality of buffer springs two 31 fixed to the outer end of the connecting plate 32, and a support plate 33 fixedly connected with the buffer springs two 31. The buffer structure 23 is installed on each connecting seat 22. When the connecting seat 22 moves downward in the moving groove 11 and collides with another connecting seat 22, the connecting seat 22 is in contact with the buffer rubber frame 231 for buffering. The buffer rubber frame 231 is installed with a buffer spring one 232, the buffer rubber frame 231 is deformed to drive the buffer spring one 232 to contract and rebound, further buffering is realized, contact and collision between the plurality of telescopic support structures 2 are effectively prevented, and safety is improved.

[0029] In this embodiment, the auxiliary adjusting structure 4 comprises a plurality of hydraulic cylinders 41 fixedly connected with the support frame 1, a U-shaped frame 42 is fixed at the top of the plurality of hydraulic cylinders 41, a plurality of groups of communication slots 43 are formed in the U-shaped frame 42, an auxiliary support 44 is inserted into each group of communication slots 43, and the auxiliary support 44 can be displaced to the side of the support frame 1 and in contact with a group of telescopic support structures 2 through the communication slots 43.

[0030] Specifically, according to the position of the buffer support structure 3, the upper auxiliary support 44 or the lower auxiliary support is selected, the auxiliary support 44 is completely pushed into the communication slot 43, the auxiliary support 44 is U-shaped, the two ends of the auxiliary support 44 are moved to the two sides of the support frame 1, and the auxiliary support 44 is located below the buffer support structure 3 which needs to be adjusted in height, then the external hydraulic pump station is controlled to deliver oil to the plurality of hydraulic cylinders 41, the plurality of hydraulic cylinders 41 are extended to drive the auxiliary support 44 upward, the auxiliary support 44 is in contact with the buffer support structure 3 to lift the buffer support structure 3 in the moving groove 11, after the buffer support structure 3 is moved to the appropriate height, the external hydraulic pump is controlled to stop delivering oil to the plurality of hydraulic cylinders 41, and the buffer support structure 3 is delivered to extend, so that the two buffer structures 23 are in contact with the formwork on the two sides of the tunnel foundation pit 5 for support, and the plurality of telescopic support structures 2 are operated and adjusted to the appropriate height for foundation pit support, so that the operation is simple, the construction efficiency is high, and the labor loss is reduced.

[0031] Among them, the plurality of support hydraulic cylinders 21 and the plurality of hydraulic cylinders 41 are connected with the external hydraulic pump station through a hose for oil delivery.

[0032] In embodiment two, on the basis of embodiment one, the buffer structure 23 comprises a buffer rubber frame 231 fixed at the top of the connecting seat 22, and a buffer spring one 232 is fixed in the buffer rubber frame 231, and the buffer structure 23 is installed on each connecting seat 22, when the connecting seat 22 is moved downward in the moving groove 11 and in contact with another connecting seat 22, the connecting seat 22 is in contact with the buffer rubber frame 231 for buffering, and the buffer spring one 232 is installed in the buffer rubber frame 231, the buffer rubber frame 231 is deformed to drive the buffer spring one 232 to contract and rebound, so as to further buffer and effectively prevent the contact and collision between the plurality of groups of telescopic support structures 2, thereby improving the safety.

[0033] Working principle:

[0034] When the templates on both sides of the tunnel foundation pit 5 are built and the slow-setting concrete is poured, the device is installed in the middle of the tunnel foundation pit 5 for support, the support frame 1 is fixedly installed in the middle of the tunnel foundation pit 5, a plurality of sets of telescopic support structures 2 are arranged in the moving groove 11 and driven through the auxiliary adjusting structure 4, each set of telescopic support structure 2 moves in the moving groove 11 to adjust the height, and then the telescopic support structure 2 is controlled to extend, so that the buffer support structures 3 on both sides are in contact with the templates on both sides of the tunnel foundation pit 5 for support, the device is convenient for adjusting the height of the plurality of sets of telescopic support structures 2 through the auxiliary adjusting structure 4, reduces the labor loss, and as the slow-setting concrete on both sides of the tunnel foundation pit 5 thickens, the device can still continue to support without the need to rebuild.

[0035] When the height of the telescopic support structure 2 is adjusted using the auxiliary adjusting structure 4, the upper auxiliary support 44 or the lower support is selected according to the position of the buffer support structure 3, the auxiliary support 44 is completely pushed into the communication slot 43 by the construction personnel, the auxiliary support 44 is U-shaped, the two ends of the auxiliary support 44 are moved to both sides of the support frame 1 and below the buffer support structure 3 that needs to be adjusted in height, then the external hydraulic pump station is controlled to deliver oil to the multi-section hydraulic cylinder 41, the multi-section hydraulic pump extends to drive the auxiliary support 44 upward, the auxiliary support 44 is in contact with the two support hydraulic cylinders 21 to lift them, the connecting seat 22 moves in the moving groove 11, after the two support hydraulic cylinders 21 are moved to the appropriate height, the external hydraulic pump is controlled to stop delivering liquid to the multi-section hydraulic cylinder 41, and then the two support hydraulic cylinders 21 are delivered, the two support hydraulic cylinders 21 extend to drive the buffer structures 23 on both sides to contact the templates on both sides of the tunnel foundation pit 5 for support, a plurality of telescopic support structures 2 are operated and adjusted to the appropriate height for foundation pit support, the operation is simple, the construction efficiency is high, and the labor is reduced.

[0036] When disassembled later, the auxiliary support 44 is completely pushed into the communication slot 43, the two ends of the auxiliary support 44 are moved to both sides of the support frame 1, then the external hydraulic pump station is controlled to deliver oil to the multi-section hydraulic cylinder 41, the multi-section hydraulic pump extends to drive the auxiliary support 44 upward, and the auxiliary support 44 is in contact with the buffer support structure 3 and then stops working, the buffer support structure 3 is controlled to retract and separate from the template, and then the multi-section hydraulic cylinder 41 is controlled to retract, driving the buffer support structure 3 to descend and be collected, so that the disassembly is fast and convenient.

[0037] A buffer structure 23 is installed on each connecting seat 22, when the connecting seat 22 moves downward in the moving groove 11 and contacts and collides with another connecting seat 22, the connecting seat 22 is in contact with the buffer rubber frame 231 and is extruded for buffering, a buffer spring one 232 is installed in the buffer rubber frame 231, the buffer rubber frame 231 is extruded and deformed to drive the buffer spring one 232 to retract and rebound, further buffering is realized, contact and collision between a plurality of sets of telescopic support structures 2 are effectively prevented, and safety is improved.

[0038] By precisely controlling the extension length of the multiple hydraulic cylinders 41 through an external hydraulic pump station, the construction personnel can very accurately adjust the height of the auxiliary support 44 and the support hydraulic cylinder 21, thereby realizing fine adjustment of the telescopic support structure 2

[0039] The adjustment mode not only improves the construction precision, but also greatly shortens the time required for adjustment, improves the

[0040] Body construction efficiency

[0041] The buffer structure 23 is composed of the buffer spring two 31, the connecting plate 32 and the supporting plate 33. The supporting plate 33 is in contact with the formwork and bears the force to drive the buffer spring two 31 to return and compress to rebound, firmly resisting the module, and enhancing the stability and carrying capacity of the formwork support.

Claims

1. A subway tunnel foundation pit supporting device, comprising a support frame (1) fixedly installed in the middle of a tunnel foundation pit (5), characterized in that: The support frame (1) is provided with a moving groove (11) on both sides, a plurality of groups of telescopic support structures (2) are slidably connected in the moving groove (11), each group of telescopic support structures (2) is fixed with a buffer support structure (3) at both ends and contacts and supports the two sides of the tunnel foundation pit (5), the support frame (1) is fixed with an auxiliary adjusting structure (4), and the auxiliary adjusting structure (4) cooperates with the plurality of groups of telescopic support structures (2) to adjust the height position.

2. The subway tunnel foundation pit supporting device according to claim 1, characterized in that, The tunnel foundation pit (5) is provided with a formwork on both sides, the formwork is poured with concrete, and the plurality of groups of telescopic support structures (2) are extended through the buffer support structure (3) to contact and support the formwork on the two side walls of the tunnel foundation pit (5).

3. The subway tunnel foundation pit supporting device according to claim 1, characterized in that, The telescopic support structure (2) comprises a connecting seat (22) slidably installed in the moving groove (11) of the support frame (1), a buffer structure (23) fixed on the top of the connecting seat (22), and two support hydraulic cylinders (21) fixed on the both sides of the connecting seat (22), and the opposite telescopic ends of the two support hydraulic cylinders (21) are fixedly connected with the buffer support structure (3).

4. The subway tunnel foundation pit supporting device according to claim 3, characterized in that, The buffer structure (23) comprises a buffer rubber frame (231) fixed on the top of the connecting seat (22), and a buffer spring (232) fixed in the buffer rubber frame (231).

5. The subway tunnel foundation pit supporting device according to claim 3, characterized in that, The buffer support structure (3) comprises a connecting plate (32) fixed on the telescopic end of the support hydraulic cylinder (21), a plurality of buffer springs (31) fixed on the outer end of the connecting plate (32), and a support plate (33) fixedly connected by the plurality of buffer springs (31).

6. The subway tunnel foundation pit supporting device according to claim 3, characterized in that, The auxiliary adjusting structure (4) comprises a plurality of groups of hydraulic cylinders (41) fixedly connected with the support frame (1), a U-shaped frame (42) fixed on the top of the plurality of groups of hydraulic cylinders (41), a plurality of groups of communication insertion grooves (43) formed on the U-shaped frame (42), and an auxiliary support (44) inserted and connected in each group of communication insertion grooves (43).

7. The subway tunnel foundation pit supporting device according to claim 6, characterized in that, The auxiliary support (44) can be displaced to contact with a group of telescopic support structures (2) on both sides of the support frame (1) through the communication insertion groove (43).

8. The subway tunnel foundation pit supporting device according to claim 6, characterized in that, The plurality of support hydraulic cylinders (21) and the plurality of groups of hydraulic cylinders (41) are connected with an external hydraulic pump station through a hose for oil supply.

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