Gravity type supporting system for protecting closely-attached subway station and construction method

Abstract

The invention discloses a gravity type supporting system for protecting a closely attached subway station and a construction method, and relates to the technical field of foundation pit supporting, the gravity type supporting system comprises a supporting frame and bearing platforms arranged layer by layer, the bearing platforms are provided with a plurality of water tanks, and the water tanks are provided with connecting pipes and bearing locking mechanisms; the connecting pipe is horizontally connected to the bottom of the water tank; the bearing locking mechanism is used for bearing the connecting pipe and locking the connecting pipe. According to the gravity type supporting system for protecting the close subway station and the construction method, when the water tank ballast system is arranged, the connecting pipe of one water tank is inserted into the bearing locking mechanism of the other water tank, and the connecting pipe can be connected and locked through the bearing locking mechanism; every two adjacent water tanks are communicated and locked together through the corresponding connecting pipe, and then water is injected into one water tank, so that the same liquid level height can be kept in the multiple communicated water tanks.

Description

Technical Field

[0001] The invention relates to the technical field of foundation pit support, and in particular to a gravity support system and a construction method for protecting a closely attached subway station. Background Art

[0002] Foundation pit support refers to the support measures taken during the earth excavation process to ensure the safety and stability of the foundation pit and prevent adjacent structures from being affected. For foundation pit support near subway stations, a more stringent support system is required to avoid affecting the subway stations.

[0003] For example, the patent document with the authorization announcement number CN115305966B and the authorization announcement date October 13, 2023, and the name of the patent document is "A construction method for a gravity support system for protecting a close-fitting subway station", which includes: constructing a foundation pit retaining structure outside the subway station, excavating the foundation pit and reserving a back pressure soil on the side of the foundation pit retaining structure close to the subway station, excavating the back pressure soil, pouring concrete to form a support frame, and laying a combined water tank ballast system on the existing support frame until the back pressure soil is excavated. This patent avoids the impact of large-scale excavation and unloading of a single-sided foundation pit on the structural safety of an operating subway station.

[0004] In the prior art, a water tank ballast system is arranged layer by layer as the foundation pit is excavated. For several water tanks on the same layer, it is rather cumbersome to fill water into the several water tanks separately, and it is not convenient to synchronously control the liquid level heights in the several water tanks. Summary of the invention

[0005] The purpose of the present invention is to provide a gravity support system and construction method for protecting a close-fitting subway station, so as to solve the above-mentioned deficiencies in the prior art.

[0006] In order to achieve the above object, the present invention provides the following technical solutions: A gravity support system for protecting a subway station, comprising a support frame and a load-bearing platform arranged layer by layer, wherein the load-bearing platform is provided with a plurality of water tanks, and the water tanks are provided with: A connecting pipe horizontally connected to the bottom of the water tank; The receiving and locking mechanism is used to receive the connecting pipe and lock the connecting pipe.

[0007] The above-mentioned gravity support system is used to protect the subway station closely. The receiving and locking mechanism includes a receiving pipe fixedly connected to the water tank and a slide plate slidably connected to the water tank. A clamping groove is constructed on the connecting pipe.

[0008] The above-mentioned gravity support system is used to protect a subway station in close proximity. A first blocking plate is hinged on the slide plate, and a first torsion spring is arranged between the slide plate and the first blocking plate.

[0009] The above-mentioned gravity support system is used to protect a subway station in close proximity, and the sum of the thicknesses of the slide plate and the first blocking plate is the same as the width of the clamping groove.

[0010] The above-mentioned gravity support system for protecting and closely fitting a subway station, the receiving and locking mechanism also includes a limiting block fixed to the inner wall of the water tank and a first elastic member for forcing the slide plate to approach the limiting block.

[0011] The above-mentioned gravity support system is used to protect the subway station closely. A handle is vertically inserted into the inner wall of the water tank. The top of the handle is exposed from the water tank, and the bottom is fixed to the slide plate.

[0012] The above-mentioned gravity support system is used to protect a close-fitting subway station. A second sealing plate is hinged in the water tank, and a second torsion spring is arranged on the water tank to force the second sealing plate to seal the connecting pipe.

[0013] The above-mentioned gravity support system is used to protect a subway station in close proximity. A sliding rod is slidably connected in the connecting pipe. One end of the sliding rod is constructed with a wedge-shaped surface and the wedge-shaped surface is located in the clamping groove, and the other end is in contact with the second blocking plate.

[0014] The above-mentioned gravity support system is used to protect a close-fitting subway station. A first mounting seat and a second mounting seat are fixed to the bottom of the water tank. The first mounting seat is rotatably connected to a first roller, and the second mounting seat is rotatably connected to a second roller. The first mounting seat is slidably connected to a brake rod, and the brake rod extends into the water tank. The brake rod has a wedge-shaped portion at the top and a friction portion at the bottom. A second elastic member is arranged in the water tank to force the friction portion away from the first roller.

[0015] A construction method for protecting a gravity support system of a close-fitting subway station is provided. The method is based on any of the above support systems and connects and locks two adjacent water tanks through a connecting pipe and a receiving locking mechanism.

[0016] In the above technical scheme, the present invention provides a gravity support system and construction method for protecting a close-fitting subway station. When laying out the water tank ballast system, the connecting pipe of one water tank is inserted into the receiving and locking mechanism of another water tank. The connecting pipe can be connected and locked through the receiving and locking mechanism, so that two adjacent water tanks are connected and locked together through the connecting pipe. Subsequently, water is poured into one water tank to maintain the same liquid level height in multiple interconnected water tanks. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0018] Figure 1 A schematic diagram of the overall structure provided by an embodiment of the present invention; Figure 2 A top view of two adjacent water tanks provided in yet another embodiment of the present invention; Figure 3 A front view of two adjacent water tanks provided in yet another embodiment of the present invention; Figure 4 A schematic diagram of the structure of a receiving pipe and a connecting pipe provided in yet another embodiment of the present invention; Figure 5 A schematic diagram of a sliding rod structure provided in yet another embodiment of the present invention; Figure 6 A schematic diagram of the structure of a second blocking plate provided in yet another embodiment of the present invention; Figure 7 A schematic diagram of a card slot structure provided in yet another embodiment of the present invention; Figure 8 A schematic diagram of the structure of a brake rod and a resistance rod provided in another embodiment of the present invention.

[0019] Description of reference numerals: 1. Support frame; 2. Load-bearing platform; 3. Water tank; 4. Connecting pipe; 5. Top cover; 6. Receiver pipe; 7. Slide plate; 8. Snap-in groove; 9. First blocking plate; 10. Limiting block; 11. First elastic member; 12. Handle; 13. Second blocking plate; 14. Slide bar; 141. Wedge-shaped surface; 15. First mounting seat; 16. Second mounting seat; 17. First roller; 18. Second roller; 19. Brake rod; 191. Wedge-shaped part; 192. Friction part; 20. Second elastic member; 21. Resistance rod; 211. First resistance part; 212. Second resistance part; 22. Sealing cloth. DETAILED DESCRIPTION

[0020] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0021] Reference Figure 1-8An embodiment of the present invention provides a gravity support system for protecting a close-fitting subway station, including a support frame 1 and a bearing platform 2 arranged layer by layer, wherein a plurality of water tanks 3 are arranged on the bearing platform 2, and a connecting pipe 4 and a receiving and locking mechanism are arranged on the water tank 3, wherein the connecting pipe 4 is horizontally connected to the bottom of the water tank 3; and the receiving and locking mechanism is used to receive the connecting pipe 4 and lock the connecting pipe 4.

[0022] Specifically, when excavating a foundation pit at a location close to a subway station, counter-pressure soil will be reserved on the side of the foundation pit close to the subway station to maintain the stability of the foundation pit and the subway station. The cross-section of the counter-pressure soil is generally triangular or trapezoidal. Subsequently, steel structure and concrete are arranged on the counter-pressure soil to form a support frame 1, and then the counter-pressure soil can be excavated layer by layer. After completing the excavation of one layer, it is necessary to build a bearing platform 2 on that layer and lay a water tank ballast system to simulate the weight of the counter-pressure soil. In this way, the support system of the foundation pit close to the subway station can be formed by excavating the soil layer by layer and laying out the water tank ballast system. The above are all existing technologies and will not be repeated here. The innovation of the embodiment of the present invention is that a connecting pipe 4 and a receiving and locking mechanism are arranged on the water tank 3, the connecting pipe 4 is connected to the water tank 3 and is horizontally arranged at the bottom of the water tank 3, and the receiving and locking mechanism can be a combination of a pipe body and a locking structure, so that the connecting pipe 4 of one water tank 3 can be inserted into the pipe body of another water tank 3 and the pipe body and the connecting pipe 4 can be locked by the locking structure, so that the two adjacent water tanks 3 can be connected through the connecting pipe 4, and the relative positions of the two adjacent water tanks 3 can be limited by the connecting pipe 4. The advantage of such a configuration is that after two adjacent water tanks 3 are connected and locked through the connecting pipe 4, it is only necessary to inject water into one water tank 3 to maintain the same liquid level height in the multiple water tanks 3 that are interconnected through the connecting pipe 4. The amount of water injected is then controlled to control the total weight of the water tank ballast system of this layer to be the same as the weight of the back-pressure soil excavated in this layer, thereby simulating the load applied by the original back-pressure soil to the support frame 1 through the supporting platform 2 and the multiple water tanks 3 on the supporting platform 2. Since the liquid level heights in the multiple water tanks 3 are basically the same, the loads applied by the multiple water tanks 3 to the supporting platform 2 are basically the same, thereby improving the stability of the overall support frame 1.

[0023] It should be noted that a top cover 5 is constructed on the top of the water tank 3. After the top cover 5 is opened, water can be poured into the water tank 3. Air holes are reserved on the top cover 5 to connect the top of the water tank 3 with the outside air, so that after two adjacent water tanks 3 are connected to each other, the liquids in the water tanks 3 can flow to each other to form the same liquid level height.

[0024] An embodiment of the present invention provides a gravity support system for protecting a close-fitting subway station. When a water tank ballast system is laid out, a connecting pipe 4 of one water tank 3 is inserted into a receiving and locking mechanism of another water tank 3. The connecting pipe 4 can be connected and locked through the receiving and locking mechanism, so that two adjacent water tanks 3 are connected and locked together through the connecting pipe 4. Subsequently, water is injected into one water tank 3 to maintain the same liquid level height in multiple water tanks 3 that are connected to each other.

[0025] In another embodiment of the present invention, as an alternative to the above-mentioned receiving and locking mechanism, the receiving and locking mechanism preferably comprises a receiving tube 6 fixedly connected to the water tank 3 and a slide plate 7 slidably connected to the water tank 3, and a clamping groove 8 is configured on the connecting tube 4. Specifically, Figure 4-Figure 6 They are the connecting pipe 4 and the receiving pipe 6 parts of two adjacent water tanks 3 that are plugged into each other; the receiving pipe 6 and the connecting pipe 4 are both horizontally arranged and respectively located on opposite sides of the water tank 3, and the receiving pipe 6 and the horizontal pipe (central axis) are located at the same height at the bottom of the water tank 3, and the two can be plugged in through interference fit. Preferably, the inner diameter of the receiving pipe 6 is slightly larger than the outer diameter of the connecting pipe 4, and a number of rubber sealing rings are embedded in the inner wall of the receiving pipe 6 to enable the connecting pipe 4 and the receiving pipe 6 to be plugged in and sealed with each other; the slide plate 7 is slidably connected to the inner wall of the water tank 3, and the sliding rail structure in the prior art can be selected as the sliding connection method between the two; the clamping groove 8 is constructed at the top of the connecting pipe 4, and the slide plate 7 is located at the top of the receiving pipe 6. In this embodiment, the slide plate 7 is adapted to the clamping groove 8, and a manual or electric linear drive structure (such as an electric push rod or a cylinder) can be set in the water tank 3 to drive the slide plate 7 to embed into the corresponding clamping groove 8, thereby locking the relative positions of the connecting pipe 4 and the receiving pipe 6. The advantage of such an arrangement is that when multiple water tanks 3 are arranged, the positions of the water tanks 3 can be arranged in sequence so that the connecting pipe 4 on the second water tank 3 is inserted into the receiving pipe 6 of the first (i.e., the adjacent) water tank 3, thereby locking the connecting pipe 4 on the second water tank 3 through the slide 7 in the first water tank 3, thereby limiting the positions of the two adjacent water tanks 3 and avoiding the position displacement of the water tanks 3 on the supporting platform 2 as much as possible. At the same time, the connecting pipe 4 and the receiving pipe 6 are connected to each other so that the two adjacent water tanks 3 can be connected to each other, thereby keeping the liquid levels in the two adjacent water tanks 3 at the same height.

[0026] As an alternative solution for the above-mentioned slide plate 7 to fit the clamping groove 8, preferably, a first blocking plate 9 is hingedly connected to the slide plate 7, and a first torsion spring (the torsion spring structure is a prior art, not shown) is arranged between the slide plate 7 and the first blocking plate 9. The sum of the thickness of the slide plate 7 and the first blocking plate 9 is the same as the width of the clamping groove 8. Specifically, in the present embodiment, the first torsion spring can force the first blocking plate 9 away from the slide plate 7, so that the first blocking plate 9 and the slide plate 7 are in the same plane and are simultaneously attached to the inner wall of the water tank 3. At this time, the first blocking plate 9 can block the end of the receiving tube 6 located in the water tank 3. When the connecting pipe 4 is inserted into the receiving tube 6 (the description of the mutual insertion of the connecting pipe 4 and the receiving tube 6 in the text is based on the mutual insertion of two adjacent water tanks 3, that is, the connecting pipe 4 of one water tank 3 is inserted into the receiving tube 6 of another water tank 3), the connecting pipe 4 resists the first blocking plate 9 to force the first blocking plate 9 to rotate to a position close to vertical with the slide plate 7 until the engaging groove 8 on the connecting pipe 4 moves to the bottom of the slide plate 7, and the slide plate 7 is controlled to move downward. At this time, the inner wall of the engaging groove 8 can force the first blocking plate 9 to further approach the slide plate 7 and attach to the slide plate 7, so that the engaging groove 8 is engaged (that is, embedded in the engaging groove 8) by the attached slide plate 7 and the first blocking plate 9. The advantage of such a configuration is that when two adjacent water tanks 3 are not connected through the connecting pipe 4, one end of the receiving pipe 6 located in the water tank 3 is blocked by the first sealing plate 9, so as to avoid impurities from entering the water tank 3 or water in the water tank 3 from flowing out through the receiving pipe 6 (the water tank 3 can be pre-filled with water, or liquid can be retained inside the water tank 3 when it is recycled). After the connecting pipe 4 is inserted into the receiving pipe 6, the first sealing plate 9 is passively opened to connect the two adjacent water tanks 3 through the connecting pipe 4, and then the first sealing plate 9 can also cooperate with the slide plate 7 to clamp the clamping groove 8 to lock the connecting pipe 4. Compared with the above-mentioned embodiment in which the clamping groove 8 is only clamped by the slide plate 7, the first sealing plate 9 and the slide plate 7 cooperate to clamp the clamping groove 8 more stably and firmly.

[0027] As an alternative to the linear drive structure driving the slide plate 7 to slide along the inner wall of the water tank 3, preferably, the receiving and locking mechanism further includes a limiting block 10 fixed to the inner wall of the water tank 3 and a first elastic member 11 for forcing the slide plate 7 to approach the limiting block 10. A handle 12 is vertically inserted into the inner wall of the water tank 3, the top end of the handle 12 is exposed from the water tank 3, and the bottom end is fixed to the slide plate 7. Specifically, the limiting block 10 is located below the receiving tube 6, and the first elastic member 11 can adopt a spring structure in the prior art, one end of which is fixed to the inner wall of the water tank 3, and the other end is fixed to the slide plate 7, so as to force the slide plate 7 to approach the limiting block 10 through the first elastic member 11; the inner wall of the water tank 3 is constructed with a protrusion, and the handle 12 is inserted on the protrusion, so that the slide plate 7 can be operated by the handle 12 and slide along the inner wall of the water tank 3. Since the slide plate 7 fits the inner wall of the water tank 3, the slide plate 7 and the handle 12 cannot rotate on the protrusion; when the first elastic member 11 adopts a spring structure, the spring can be sleeved on the handle 12, one end of which is fixed to the protrusion, and the other end is fixed to the slide plate 7, so that the slide plate 7 and the handle 12 can be forced to approach the limiting block 10 through the first elastic member 11. When the connecting pipe 4 is not inserted into the receiving pipe 6, the first blocking plate 9 is attached to the inner wall of the water tank 3 under the action of the first torsion spring and is kept in the same plane as the slide plate 7. At this time, the first elastic member 11 can force the slide block and the handle 12 to approach the limiting block 10, so that the end of the first blocking plate 9 away from the slide plate 7 can abut against the limiting block 10 (such as Figure 6 As shown), the receiving tube 6 is blocked by the first blocking plate 9, and the handle 12 is pulled upward from the outside of the water tank 3 to drive the first blocking plate 9 to move upward and then open the receiving tube 6 (in the process, the first blocking plate 9 is always in contact with the inner wall of the water tank 3 under the action of the first torsion spring), which is convenient for controlling the opening or closing of the receiving tube 6; when the connecting tube 4 is inserted into the receiving tube 6, the first blocking plate 9 can be forced to overcome the elastic force of the first torsion spring and rotate to the side close to the slide plate 7 through the connecting tube 4, so that the hinge point of the first blocking plate 9 and the slide plate 7 is in contact with the top of the connecting tube 4 under the action of the first elastic member 11 (as shown in FIG. Figure 7 As shown), until the clamping groove 8 moves to the bottom of the slide plate 7 along with the connecting pipe 4, the first blocking plate 9 is attached to the slide plate 7 and is embedded in the clamping groove 8 under the action of the first elastic member 11 (as shown in FIG. Figure 4As shown), the connecting pipe 4 is locked; when the connecting pipe 4 needs to be unlocked, the handle 12 is pulled upward so that the connecting pipe 4 can be moved out of the corresponding receiving pipe 6, and then the first blocking plate 9 is reset under the action of the first torsion spring to release the handle 12, so that the receiving pipe 6 can be blocked again by the first blocking plate 9. The advantage of such a setting is that when the connecting pipe 4 is not inserted into the receiving pipe 6, the position of the slide plate 7 can be controlled by the handle 12 and the first elastic member 11, and then the receiving pipe 6 can be blocked or opened by the first blocking plate 9, which is convenient for filling water into the water tank 3 or cleaning the water tank 3; when the connecting pipe 4 is inserted into the receiving pipe 6, the first elastic member 11 can drive the slide plate 7 and the first blocking plate 9 to passively embed into the clamping groove 8 to clamp and lock the connecting pipe 4; when the connecting pipe 4 needs to be unlocked, the handle 12 is pulled upward to drive the slide plate 7 to move out of the clamping groove 8, thereby unlocking the connecting pipe 4, which is convenient for locking or unlocking the two adjacent water tanks 3.

[0028] Furthermore, a second blocking plate 13 is hinged in the water tank 3, and a second torsion spring (not shown) is provided on the water tank 3 for forcing the second blocking plate 13 to block the connecting pipe 4. A sliding rod 14 is slidably connected in the connecting pipe 4, and one end of the sliding rod 14 is configured with a wedge surface 141 and the wedge surface 141 is located in the clamping groove 8, and the other end is in contact with the second blocking plate 13. Specifically, the second torsion spring is arranged in the water tank 3 to force the second blocking plate 13 to block one end of the connecting pipe 4 located in the water tank 3. Optionally, the second torsion spring is arranged between the second blocking plate 13 and the water tank 3; the inner wall of the connecting pipe 4 is constructed with an extension portion, and the sliding rod 14 is inserted on the extension portion along the axial direction of the connecting pipe 4. The sliding rod 14 has a certain sliding stroke on the extension portion. In normal state, the second blocking plate 13 blocks the connecting pipe 4 under the action of the second torsion spring. At the same time, the second blocking plate 13 resists the sliding rod 14 to drive the sliding rod 14 to slide to one end of its stroke close to the clamping groove 8. At this time, if the slide plate 7 is embedded in the clamping groove 8, the end of the slide plate 7 and the first blocking plate 9 can resist the wedge surface 141 of the sliding rod 14 to force the sliding rod 14 to move away from the clamping groove 8, so that the sliding rod 14 resists the second blocking plate 13, so that the second blocking plate 13 overcomes the elastic force of the second torsion spring and opens the connecting pipe 4 (such as Figure 5As shown, it should be noted that the elastic force of the first elastic member 11 is relatively large, which can force the first blocking plate 9 to overcome the elastic force of the first torsion spring and force the second blocking plate 13 to overcome the elastic force of the second torsion spring through the slide bar 14). The advantage of such a setting is that, in this embodiment, when the two adjacent water tanks 3 are not connected, the receiving pipe 6 is blocked by the first blocking plate 9, and the connecting pipe 4 is blocked by the second blocking plate 13, so that the two water tanks 3 can be pre-filled with water without leakage (or without leakage during the recycling process); when the connecting pipe 4 of one water tank 3 is inserted into the receiving pipe 6 of another water tank 3, the corresponding slide plates 7 and slide bars 14 and other structures in the two water tanks 3 can force the first blocking plate 9 to open the corresponding receiving pipe 6, and at the same time force the second blocking plate 13 to open the corresponding connecting pipe 4, so as to connect the two water tanks 3 after the two water tanks 3 are locked with each other (the locking and opening of the connecting pipe 4 are basically achieved synchronously).

[0029] In another embodiment provided by the present invention, further, a first mounting seat 15 and a second mounting seat 16 are fixed at the bottom of the water tank 3, a first roller 17 is rotatably connected to the first mounting seat 15, and a second roller 18 is rotatably connected to the second mounting seat 16. Specifically, in the above embodiment, the water tank 3 can be moved on the bearing platform 2 of the support frame 1. For the water tank 3 that is not filled with water, it can be directly transported and moved. However, for the water tank 3 that has been filled with water for recycling, its movement on the bearing platform 2 is not convenient enough. For this reason, two groups of mounting seats are set at the bottom of the water tank 3, wherein two first mounting seats 15 are symmetrically arranged and both are located on the side of the water tank 3 close to the receiving pipe 6, and two second mounting seats 16 are symmetrically arranged and both are located on the side of the water tank 3 close to the connecting pipe 4, so that the water tank 3 can be moved on the platform of the support frame 1 through the first roller 17 and the second roller 18.

[0030] When several water tanks 3 on the same bearing platform 2 are connected to each other, several mounting seats need to be braked to prevent the several water tanks 3 from moving synchronously on the support frame 1. Figure 8As shown, preferably, a brake rod 19 is slidably connected to the first mounting seat 15, and the brake rod 19 extends into the water tank 3. The top end of the brake rod 19 is configured with a wedge-shaped portion 191, and the bottom end is configured with a friction portion 192. A second elastic member 20 is provided in the water tank 3 for forcing the friction portion 192 to move away from the first roller 17. Specifically, the brake rod 19 passes through the first mounting seat 15 and the water tank 3 at the same time, and a dynamic sealing structure is provided between the brake rod 19 and the water tank 3. The brake rod 19 has a certain sliding stroke in the water tank 3. When the brake rod 19 is at the top of its stroke, the wedge-shaped portion 191 and the connecting pipe 4 are at the same height, that is, the wedge-shaped portion 191 is located on the moving stroke of the connecting pipe 4 on the other water tank 3. When the brake rod 19 is at the bottom of its stroke, the friction portion 192 contacts the first roller 17 to limit the rotation of the first roller 17; the second elastic member 20 can select a spring structure in the prior art, which is located in the water tank 3 and is sleeved on the brake rod 19. One end of the second elastic member 20 is fixed on the brake rod 19, and the other end is fixed on the inner wall of the water tank 3, so as to force the brake rod 19 to move into the water tank 3 through the second elastic member 20, thereby driving the friction portion 192 away from the first roller 17. The advantage of such a configuration is that when two adjacent water tanks 3 are not connected, the brake rod 19 is at the top of its stroke under the action of the second elastic member 20, and at this time the first roller 17 and the second roller 18 are used normally, which facilitates the movement of the water tank 3 on the supporting platform 2; after the position of the first water tank 3 is determined, the connecting pipe 4 of the second water tank 3 is inserted into the receiving pipe 6 of the first water tank 3 so that the connecting pipe 4 of the second water tank 3 contacts the wedge-shaped portion 191 in the first water tank 3, so as to force the brake rod 19 in the first water tank 3 to overcome the elastic force of the second elastic member 20 and approach the corresponding first roller 17, thereby braking the first roller 17 on the first water tank 3 through the friction portion 192, thereby avoiding the first water tank 3 from shifting during the subsequent plug-in process as much as possible, and avoiding the first water tank 3 from shifting during the subsequent ballasting process as much as possible.

[0031] As an alternative scheme for the above-mentioned second torsion spring to be arranged between the second sealing plate 13 and the water tank 3, preferably, a resistance rod 21 is hinged on the second mounting seat 16, and the resistance rod 21 is constructed with a first resistance portion 211 and a second resistance portion 212, the first resistance portion 211 is located on one side of the second roller 18, the second resistance portion 212 extends into the water tank 3 and is located on the side of the second sealing plate 13 away from the sliding rod 14, the second torsion spring is located between the resistance rod 21 and the second mounting seat 16, and the elastic force of the second torsion spring is smaller than the elastic force of the first elastic member 11. Specifically, the overall structure of the resistance rod 21 is a broken line shape, and its end close to the second roller 18 is a first resistance part 211, and the end close to the second blocking plate 13 is a second resistance part 212; a movable groove is constructed on the second mounting seat 16, and a through hole is constructed on the water tank 3. The resistance rod 21 is hinged on the inner wall of the movable groove and penetrates into the through hole. A sealing cloth 22 is fixed to the inner wall of the through hole. The area of ​​the sealing cloth 22 is larger than the area of ​​the through hole, and the center position of the sealing cloth 22 is fixed to the resistance rod 21, so that the resistance rod 21 can move in the through hole while maintaining the sealing of the through hole; in this embodiment, the second torsion spring is located between the resistance rod 21 and the second mounting seat 16 (the inner wall of the mounting groove), so that the resistance rod 21 is forced to rotate toward the second blocking plate 13 through the second torsion spring, and then the second blocking plate 13 is forced to block the connecting pipe 4 through the second resistance part 212, and at the same time the second torsion spring can force the first The first stopper 211 is used to lock the second roller 18, and the second stopper 211 is used to lock the second roller 18. The first stopper 211 is used to lock the second roller 18, and the second stopper 211 is used to lock the second roller 18. The first stopper 211 is used to lock the second roller 18, and the second stopper 211 is used to lock the second roller 18. The advantage of such a configuration is that after the position of the first water tank 3 is determined, when the connecting pipe 4 of the second water tank 3 is inserted into the receiving pipe 6 of the first water tank 3, the first roller 17 on the first water tank 3 and the second roller 18 on the second water tank 3 can be passively braked by structures such as the brake rod 19 and the brake rod 21. In this way, by connecting several water tanks 3 in sequence, the first rollers 17 and the second rollers 18 on the several water tanks 3 can be braked in sequence, so as to avoid the deviation of several water tanks 3 on the supporting platform 2 (such as Figure 8 As shown), conversely, when the handle 12 is pulled upward, the slide bar 14, the second blocking plate 13 and the resistance rod 21 are reset under the action of the second torsion spring, thereby releasing the restriction on the second roller 18 on the first water tank 3, and then the connecting pipe 4 is moved out of the receiving pipe 6 to release the restriction on the first roller 17 on the first water tank 3.

[0032] The present invention also provides a construction method for protecting a gravity support system of a close-fitting subway station, which is based on any of the above-mentioned support systems, and connects and locks two adjacent water tanks 3 through a connecting pipe 4 and a receiving and locking mechanism. When laying out the water tank ballast system, the connecting pipe 4 of one water tank 3 is inserted into the receiving and locking mechanism of another water tank 3 to connect and lock the two adjacent water tanks 3, so that when water is poured into one water tank 3, the same liquid level height is maintained in multiple interconnected water tanks 3.

[0033] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A gravity support system for protecting a subway station, comprising a support frame and a load-bearing platform arranged layer by layer, wherein a plurality of water tanks are arranged on the load-bearing platform, characterized in that: The water tank is provided with: A connecting pipe horizontally connected to the bottom of the water tank; The receiving and locking mechanism is used to receive the connecting pipe and lock the connecting pipe.

2. A gravity support system for protecting a close-fitting subway station according to claim 1, characterized in that: The receiving and locking mechanism comprises a receiving pipe fixedly connected to the water tank and a sliding plate slidably connected in the water tank, and a clamping groove is constructed on the connecting pipe.

3. A gravity support system for protecting a close-fitting subway station according to claim 2, characterized in that: A first blocking plate is hinged on the slide plate, and a first torsion spring is arranged between the slide plate and the first blocking plate.

4. A gravity support system for protecting a close-fitting subway station according to claim 3, characterized in that: The sum of the thicknesses of the sliding plate and the first blocking plate is equal to the width of the clamping groove.

5. A gravity support system for protecting a close-fitting subway station according to claim 4, characterized in that: The receiving and locking mechanism also includes a limiting block fixed on the inner wall of the water tank and a first elastic member used for forcing the sliding plate to approach the limiting block.

6. A gravity support system for protecting a close-fitting subway station according to claim 5, characterized in that: A handle is vertically inserted into the inner wall of the water tank, the top end of the handle is exposed out of the water tank, and the bottom end is fixed to the slide plate.

7. A gravity support system for protecting a close-fitting subway station according to claim 6, characterized in that: A second blocking plate is hinged in the water tank, and a second torsion spring for forcing the second blocking plate to block the connecting pipe is arranged on the water tank.

8. The gravity support system for protecting a close-fitting subway station according to claim 7 is characterized in that: A sliding rod is slidably connected in the connecting tube, one end of the sliding rod is constructed with a wedge surface and the wedge surface is located in the clamping groove, and the other end of the sliding rod is in contact with the second blocking plate.

9. The gravity support system for protecting a subway station according to claim 2, characterized in that: A first mounting seat and a second mounting seat are fixed at the bottom of the water tank, the first mounting seat is rotatably connected to a first roller, the second mounting seat is rotatably connected to a second roller, the first mounting seat is slidably connected to a brake rod, the brake rod extends into the water tank, the brake rod has a wedge-shaped portion at the top end and a friction portion at the bottom end, and a second elastic member for forcing the friction portion away from the first roller is arranged in the water tank.

10. A construction method for protecting a gravity support system of a subway station, based on the support system described in any one of claims 1 to 9, characterized in that: The two adjacent water tanks are locked in communication through a connecting pipe and a receiving locking mechanism.

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