Foundation pit protection device for highway bridge construction

Abstract

The invention relates to the technical field of highway bridge construction, and discloses a highway bridge construction foundation pit protection device which comprises a positioning ring, a plurality of connecting rods which are symmetrically arranged in a surrounding mode are fixedly arranged on the inner wall of the positioning ring, protection frames are fixedly arranged at the ends, away from the positioning ring, of the connecting rods, and rotating rods are rotatably arranged at the lower ends of the interiors of the protection frames in a penetrating mode. The two ends of the rotating rod are jointly and fixedly sleeved with a tamping frame, the tamping frame is arranged on the outer side of the protection frame in a sleeving mode, and a plurality of protection cover plates which are symmetrically arranged in a surrounding mode are arranged at the top of the positioning ring. According to the highway bridge construction foundation pit protection device, falling object prevention protection can be conducted on the top of a foundation pit through the multiple protection cover plates, meanwhile, the multiple tamping frames drive the tamping plates to extrude the inner wall of the foundation pit, it is guaranteed that the soil texture of the inner wall of the foundation pit is compact, mudstone is prevented from sliding off as much as possible, accumulated water at the bottom of the foundation pit can be sucked, and the safety of the foundation pit is improved. And it is guaranteed that the foundation pit is wholly dry and effectively protected.

Description

Technical Field

[0001] The invention relates to the technical field of highway bridge construction, in particular to a highway bridge construction foundation pit protection device. Background Art

[0002] When building highway bridges, foundation pit excavation is required. The geological conditions in which the foundation pit is excavated are important factors affecting the safety of the foundation pit project. If the stratum is loose, the water level is high, and seismic activity is frequent, the instability and risk of the foundation pit project will increase. These geological factors may pose a threat to the stability of the foundation pit. Therefore, it is necessary to provide necessary protection for the foundation pit. At the same time, the safety of the environment surrounding the foundation pit is also an important factor that needs to be considered in the foundation pit project. It is necessary to prevent the surrounding environment from causing damage to the foundation pit during the excavation and construction of the foundation pit.

[0003] After searching, the patent document with the announcement number CN220183824U discloses a foundation pit protection device for highway bridge construction. The foundation pit protection device is provided with a fixed support rod, a movable support rod and a connecting net on the front side of the first support column, so that when the gap of the support column needs to be shielded, the movable rod can be manually pulled toward the front side, and after being pulled, the movable rod can be rotated toward the right side. At this time, the movable support rod can be driven by the movable rod to rotate toward the area of ​​the second support column, so that the connecting net can be pulled open, and after being pulled open, the connecting net can cover the gap, so that the foundation pit protection device can form a complete protective barrier; At the same time, a stopper and a threaded part are provided on one side of the movable rod, so that after the movable support rod is rotated, one end of the threaded part can be threadedly connected to the connecting block and the rear side of the second support column. After the connection, the threaded part can limit the movable rod, so that outsiders cannot pull the movable support rod apart from the outside, so that the connecting net can stably shield the gap.

[0004] However, the above-mentioned protective device can only protect the sides of the foundation pit, but cannot provide external fall protection for the top of the foundation pit. At the same time, when there is a lot of rain, there is a lot of water inside the foundation pit, which can easily cause the soil on the sides of the foundation pit to loosen and slide, making the overall protection of the protective device relatively limited and not comprehensive enough. Summary of the invention

[0005] 1. Technical issues to be resolved In view of the deficiencies in the prior art, the present invention provides a highway bridge construction foundation pit protection device which is capable of protecting the top of the foundation pit from falling objects. At the same time, when there is a lot of rain, the soil inside the foundation pit can be compacted to avoid mud and water sliding as much as possible, and the water inside the foundation pit can be sucked out, thereby effectively protecting the foundation pit from multiple aspects. It solves the problem that only the sides of the foundation pit can be protected, and the top of the foundation pit cannot be protected from external falling. At the same time, when there is a lot of rain, there is more water inside the foundation pit, which easily causes the soil on the sides of the foundation pit to become loose and slide, making the overall protection of the protection device relatively limited and not comprehensive enough.

[0006] (II) Technical solution To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a highway bridge construction foundation pit protection device, comprising a positioning ring, a plurality of connecting rods symmetrically arranged around the inner wall of the positioning ring are fixedly provided, a plurality of connecting rods are fixedly provided with a protective frame at one end away from the positioning ring, a rotating rod is rotatably passed through the lower end of the inner part of the protective frame, and a tamping frame is fixedly sleeved on both ends of the rotating rod, and the tamping frame is sleeved on the outer side of the protective frame; The top of the positioning ring is provided with a plurality of protective cover plates which are arranged symmetrically around the top, and a rotation support mechanism is provided between the protective cover plates and the top of the positioning ring; A vertical plate is sleeved on the rod wall of the connecting rod, and a rotating tamping mechanism for driving the tamping frame to rotate is provided between the vertical plate and the tamping frame; A water suction pipe is fixedly arranged on one side of the plurality of protection frames close to each other, a protection cover is arranged on the lower end cover of the water suction pipe, and a synchronous opening mechanism is arranged between the rotating rod and the protection cover; The top of the positioning ring is rotatably penetrated by a plurality of support frames which are symmetrically arranged around the top, and a pressure plate is rotatably sleeved on the upper end of the support frame. The pressure plate contacts and cooperates with the outer wall of the protective cover plate, and a synchronous pressing mechanism is provided between the plurality of pressure plates.

[0007] Preferably, the rotating tamping mechanism includes a rack and a circular gear, the interior of the vertical plate is provided with a strip hole cooperating with the sliding of the connecting rod, a fixing rod is fixedly inserted into the strip hole, the connecting rod is slidably sleeved on the outer side of the fixing rod, a first spring is sleeved on the lower end of the rod wall of the fixing rod, the two ends of the first spring are respectively fixedly connected to the vertical rod and the connecting rod, the rack is located at the lower end of the vertical plate, and a guide plate is fixedly provided between the rack and the outer wall of the vertical plate, the circular gear is fixedly adjusted with the rotating rod, and is arranged in cooperation with the rack.

[0008] Preferably, the rotating support mechanism includes a support block, which is fixedly arranged on the top of the positioning ring and has a support rod rotatably penetrated therein, and a rotating groove cooperating with the rotation of the support block is formed at the bottom of the protective cover plate, and the support rod is fixedly arranged in the rotating groove.

[0009] Preferably, a tamping plate is fixedly provided on a side of the inner wall of the tamping frame away from the protective frame.

[0010] Preferably, the synchronous opening mechanism includes a rotating plate, which is fixedly arranged on the outer side of the end of the rotating rod, and a synchronous rod is fixedly arranged on the lower end of the side wall of the rotating plate, and the synchronous rod is fixedly connected to the protective cover.

[0011] Preferably, the synchronous pressing mechanism includes a plurality of vertical rods symmetrically arranged in a circle, the vertical rods are arranged at the top of the positioning ring, the rod wall of the vertical rod is rotatingly sleeved with a first bevel gear, the upper end of the support frame is rotatingly sleeved with a second bevel gear, the pressure plate is fixedly connected to the second bevel gear, the first bevel gear and the second bevel gear are arranged in coordination, and a synchronous driving mechanism is provided between the plurality of vertical rods.

[0012] Preferably, the synchronous drive mechanism comprises a plurality of sprockets which are symmetrically arranged in a circumferential manner, the sprockets are fixedly sleeved with the vertical rod, and a chain is provided on the outer sides of the plurality of sprockets for common transmission.

[0013] Preferably, a plurality of chain links of the chain are each provided with an insertion hole, a support tube is fixedly provided on the top of the positioning ring, a positioning rod is slidably passed through the upper end of the support tube, the lower end of the positioning rod is inserted into the insertion hole, a second spring is sleeved on the rod wall of the positioning rod, and both ends of the second spring are respectively fixedly connected to the positioning rod and the support tube.

[0014] (III) Beneficial effects Compared with the prior art, the present invention provides a highway bridge construction foundation pit protection device, which has the following beneficial effects: 1. The highway bridge construction foundation pit protection device, through the positioning ring, rotating support mechanism, protective cover, connecting rod, protective frame, rotating rod, tamping frame, tamping plate, suction pipe and protective cover, can protect the top of the foundation pit from falling objects through multiple protective covers. At the same time, multiple tamping frames drive the tamping plates to squeeze the inner wall of the foundation pit to ensure that the soil on the inner wall of the foundation pit is compacted and the sliding of mud and rocks is avoided as much as possible. At the same time, the water accumulated at the bottom of the foundation pit can be sucked out to ensure that the foundation pit is dry as a whole and effectively protected.

[0015] 2. The highway bridge construction foundation pit protection device, through the rotating support mechanism, rotating tamping mechanism, synchronous opening mechanism, synchronous pressing mechanism and synchronous driving mechanism, can make the flipping of the protective cover, the rotation of the tamping frame and the opening of the pipe mouth of the suction pipe proceed in sequence, thereby improving the overall use and operation effect of the protection device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of a highway bridge construction foundation pit protection device proposed by the present invention; Figure 2 It is a schematic diagram of the three-dimensional structure of the positioning plate, the protection frame and the tamping frame in the present invention; Figure 3 for Figure 2 A longitudinal cross-sectional view of Figure 4 for Figure 1 The structure enlarged diagram of the local A part; Figure 5 for Figure 2 A magnified view of the structure of part B in the middle.

[0017] In the figure: 1 positioning ring, 2 connecting rod, 3 protection frame, 4 rotating rod, 5 tamping frame, 6 protection cover plate, 7 vertical plate, 8 suction pipe, 9 protection cover, 10 support frame, 11 pressure plate, 12 rack, 13 circular gear, 14 fixed rod, 15 first spring, 16 guide plate, 17 support block, 18 support rod, 19 tamping plate, 20 rotating plate, 21 synchronization rod, 22 vertical rod, 23 first bevel gear, 24 second bevel gear, 25 sprocket, 26 chain, 27 support pipe, 28 positioning rod, 29 second spring. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, other embodiments obtained by ordinary technicians in this field without creative work are all within the scope of protection of the present invention.

[0019] See also Figure 1-5 A road bridge construction foundation pit protection device comprises a positioning ring 1, a plurality of connecting rods 2 arranged in a symmetrical manner are fixedly arranged on the inner wall of the positioning ring 1, a protective frame 3 is fixedly arranged at one end of the plurality of connecting rods 2 away from the positioning ring 1, a rotating rod 4 is rotatably passed through the lower end of the inner part of the protective frame 3, and a tamping frame 5 is fixedly sleeved at both ends of the rotating rod 4, and the tamping frame 5 is sleeved on the outer side of the protective frame 3; The top of the positioning ring 1 is provided with a plurality of protective cover plates 6 which are symmetrically arranged around, and a rotation support mechanism is provided between the protective cover plates 6 and the top of the positioning ring 1. The rotation support mechanism includes a support block 17, and the support block 17 is fixedly provided on the top of the positioning ring 1, and a support rod 18 is rotatably penetrated inside. A rotation groove which cooperates with the rotation of the support block 17 is provided at the bottom of the protective cover plates 6, and the support rod 18 is fixedly provided in the rotation groove.

[0020] After the foundation pit is excavated, the positioning ring 1 is installed on the upper outside of the foundation pit. At this time, multiple protective frames 3 and tamping frames 5 are located inside the foundation pit. When it is necessary to protect the top of the foundation pit from falling objects, multiple protective cover plates 6 can be flipped over under the support of the support rods 18 and the support blocks 17, and the positioning ring 1 and the top of the foundation pit are covered and protected. At this time, falling objects cannot enter the foundation pit and cause harm to the construction workers inside the foundation pit.

[0021] like Figure 2-3 As shown, the rod wall of the connecting rod 2 is sleeved with a vertical plate 7, and a rotating tamping mechanism for driving the tamping frame 5 to rotate is provided between the vertical plate 7 and the tamping frame 5. A tamping plate 19 is fixedly provided on the side of the inner wall of the tamping frame 5 away from the protective frame 3. The rotating tamping mechanism includes a rack 12 and a circular gear 13. A strip hole cooperating with the sliding of the connecting rod 2 is opened inside the vertical plate 7, and a fixing rod 14 is fixedly penetrated in the strip hole. The connecting rod 2 is slidably sleeved on the outer side of the fixing rod 14, and a first spring 15 is sleeved on the lower end of the rod wall of the fixing rod 14. The two ends of the first spring 15 are fixedly connected to the vertical rod 14 and the connecting rod 2 respectively. The rack 12 is located at the lower end of the vertical plate 7, and a guide plate 16 is fixedly provided between the rack 12 and the outer wall of the vertical plate 7. The circular gear 13 is fixedly adjusted with the rotating rod 4 and is arranged in coordination with the rack 12. When the protective cover 6 rotates and is set horizontally, the vertical plate 7 is squeezed during the rotation of the protective cover 6, so that the vertical plate 7 moves down stably under the sliding cooperation of the connecting rod 2 and the strip hole, and in the falling process of the vertical rod 7, the guiding cooperation of the fixed rod 14 and the first spring 15 ensures that the vertical plate 7 can ensure stable longitudinal movement, and when the vertical plate 7 moves downward, the vertical plate 7 drives the rack 12 to move downward through the guide plate 16, so that the rack 12 engages with the circular gear 13, so that the circular gear 13 drives the rotating rod 4 to rotate. At this time, the tamping frame 5 can drive the tamping plate 19 to rotate with the rotating rod 4 and squeeze and contact with the inner wall of the foundation pit, which can ensure that the inner wall of the pit is compacted, and mud and stone can be prevented from sliding as much as possible, so as to further protect the inside of the foundation pit.

[0022] like Figure 1 As shown, a water suction pipe 8 is fixedly provided on one side close to each other of the multiple protective frames 3, and a protective cover 9 is provided at the lower end cover of the water suction pipe 8. A synchronous opening mechanism is provided between the rotating rod 4 and the protective cover 9. The synchronous opening mechanism includes a rotating plate 20, and the rotating plate 20 is fixedly provided on the outer side of the end of the rotating rod 4. A synchronous rod 21 is fixedly provided at the lower end of the side wall of the rotating plate 20, and the synchronous rod 21 is fixedly connected to the protective cover 9.

[0023] When the rotating rod 4 rotates, the rotating rod 4 drives the synchronous rod 21 to rotate through the rotating plate 20. At this time, under the connection of the synchronous rod 21, the protective cover 9 is away from the pipe mouth of the suction pipe 8. At this time, the suction pipe 8 is connected to the external pump body, which can absorb the water at the lower end of the foundation pit, try to avoid excessive water accumulation in the foundation pit and affect the stability of the overall structure of the foundation pit, and further protect the foundation pit.

[0024] like Figure 3-5 As shown, the top of the positioning ring 1 is rotatably penetrated by a plurality of support frames 10 that are symmetrically arranged around, and a pressure plate 11 is rotatably sleeved on the upper end of the support frame 10, and the pressure plate 11 is in contact with the outer wall of the protective cover plate 6, and a synchronous pressing mechanism is provided between the plurality of pressure plates 11, and the synchronous pressing mechanism includes a plurality of vertical rods 22 that are symmetrically arranged around, and the vertical rods 22 are arranged on the top of the positioning ring 1, and a first bevel gear 23 is rotatably sleeved on the rod wall of the vertical rod 22, and a second bevel gear 24 is rotatably sleeved on the upper end of the support frame 10, and the pressure plate 11 is fixedly connected to the second bevel gear 24, and the first bevel gear 23 and the second bevel gear 24 are matched, and a synchronous driving mechanism is provided between the plurality of vertical rods 22, and the synchronous driving mechanism includes a plurality of sprocket wheels 25 that are symmetrically arranged around, and the sprocket wheels 25 are fixedly sleeved on the vertical rods 22, and a chain 26 is provided on the outer sides of the plurality of sprocket wheels 25 for common transmission; Multiple links of the chain 26 are provided with insertion holes inside, a support tube 27 is fixedly provided on the top of the positioning ring 1, a positioning rod 28 is slidably passed through the upper end of the support tube 27, the lower end of the positioning rod 28 is inserted into the insertion hole, and a second spring 29 is sleeved on the rod wall of the positioning rod 28, and the two ends of the second spring 29 are fixedly connected to the positioning rod 28 and the support tube 27 respectively.

[0025] When multiple protective cover plates 6 need to be extruded synchronously, the positioning rod 28 can be pulled up first, so that the positioning rod 28 is pulled out from the internal chain link of the chain 26. At this time, the second spring 29 is stretched, so that the chain 26 is not restricted. Then the chain 26 can be rotated, so that the chain 26 drives the multiple vertical rods 22 to rotate simultaneously under the meshing action with the multiple sprockets 25. Then, with the cooperation of the first bevel gear 23 and the second bevel gear 24, the second bevel gear 24 drives the pressure plate 11 to rotate under the support of the support frame 10, so that the multiple pressure plates 11 can squeeze the protective cover plates 6 at the same time, ensuring the rapid and stable operation of the overall foundation pit protection device. When the protective cover plates 6 rotate to the horizontal position, the positioning rod 28 is released. Under the elastic recovery of the second spring 29, the positioning rod 28 is inserted into the chain 26 again to limit the position of the chain 26 and the protective cover plates 6, so that the protection work can be carried out continuously and stably.

[0026] It should be noted that the term "comprises" or any other variation thereof is intended to cover non-exclusive inclusion, so that a process, method, article, or device that includes a series of elements includes not only those elements, but also includes other elements that are not explicitly listed, or also includes elements inherent to such process, method, article, or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article, or device that includes the element.

[0027] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A foundation pit protection device for highway bridge construction, comprising a positioning ring (1), characterized in that: The inner wall of the positioning ring (1) is fixedly provided with a plurality of connecting rods (2) arranged in a symmetrical manner around the inner wall, and a protective frame (3) is fixedly provided at one end of the plurality of connecting rods (2) away from the positioning ring (1), and a rotating rod (4) is rotatably passed through the lower end of the inner wall of the protective frame (3), and a tamping frame (5) is fixedly sleeved at both ends of the rotating rod (4), and the tamping frame (5) is sleeved on the outer side of the protective frame (3); A plurality of protective cover plates (6) arranged in a symmetrical manner around the top of the positioning ring (1) are provided, and a rotation support mechanism is provided between the protective cover plates (6) and the top of the positioning ring (1); A vertical plate (7) is sleeved on the rod wall of the connecting rod (2), and a rotating tamping mechanism for driving the tamping frame (5) to rotate is provided between the vertical plate (7) and the tamping frame (5); A water suction pipe (8) is fixedly provided on one side of each of the plurality of protection frames (3) close to each other, a protection cover (9) is provided at the lower end cover of the water suction pipe (8), and a synchronous opening mechanism is provided between the rotating rod (4) and the protection cover (9); The top of the positioning ring (1) is rotatably penetrated by a plurality of support frames (10) which are arranged symmetrically around the top, and the upper end of the support frame (10) is rotatably sleeved by a pressing plate (11), the pressing plate (11) is in contact with the outer wall of the protective cover plate (6), and a synchronous pressing mechanism is provided between the plurality of pressing plates (11).

2. A highway bridge construction foundation pit protection device according to claim 1, characterized in that: The rotary compacting mechanism comprises a rack (12) and a circular gear (13); a strip hole for slidingly cooperating with the connecting rod (2) is opened inside the vertical plate (7); a fixing rod (14) is fixedly inserted into the strip hole; the connecting rod (2) is slidably sleeved on the outer side of the fixing rod (14); a first spring (15) is sleeved on the lower end of the rod wall of the fixing rod (14); the two ends of the first spring (15) are respectively fixedly connected to the vertical rod (14) and the connecting rod (2); the rack (12) is located at the lower end of the vertical plate (7); and a guide plate (16) is fixedly provided between the rack and the outer wall of the vertical plate (7); the circular gear (13) is fixedly adjusted with the rotating rod (4) and is arranged in cooperation with the rack (12).

3. A highway bridge construction foundation pit protection device according to claim 1, characterized in that: The rotation support mechanism comprises a support block (17), the support block (17) is fixedly arranged on the top of the positioning ring (1), and a support rod (18) is rotatably penetrated inside the support block; a rotation groove for cooperating with the rotation of the support block (17) is formed at the bottom of the protective cover plate (6), and the support rod (18) is fixedly arranged in the rotation groove.

4. A road bridge construction foundation pit protection device according to claim 1, characterized in that: A tamping plate (19) is fixedly provided on a side of the inner wall of the tamping frame (5) away from the protective frame (3).

5. A highway bridge construction foundation pit protection device according to claim 1, characterized in that: The synchronous opening mechanism comprises a rotating plate (20), wherein the rotating plate (20) is fixedly arranged at the outer side of the end of the rotating rod (4), and a synchronous rod (21) is fixedly arranged at the lower end of the side wall of the rotating plate (20), and the synchronous rod (21) is fixedly connected to the protective cover (9).

6. A road bridge construction foundation pit protection device according to claim 1, characterized in that: The synchronous pressing mechanism comprises a plurality of vertical rods (22) symmetrically arranged around the vertical rods (22), the vertical rods (22) being arranged at the top of the positioning ring (1), a rod wall of the vertical rod (22) being rotatably sleeved with a first bevel gear (23), an upper end of the support frame (10) being rotatably sleeved with a second bevel gear (24), the pressing plate (11) being fixedly connected to the second bevel gear (24), the first bevel gear (23) and the second bevel gear (24) being arranged in coordination, and a synchronous driving mechanism being arranged between the plurality of vertical rods (22).

7. A road bridge construction foundation pit protection device according to claim 6, characterized in that: The synchronous drive mechanism comprises a plurality of sprocket wheels (25) arranged in a symmetrical manner around the periphery, the sprocket wheels (25) being fixedly sleeved with the vertical rod (22), and a chain (26) being provided on the outer sides of the plurality of sprocket wheels (25) for common transmission.

8. A road bridge construction foundation pit protection device according to claim 7, characterized in that: Insert holes are provided inside the multiple links of the chain (26); a support tube (27) is fixedly provided on the top of the positioning ring (1); a positioning rod (28) is slidably passed through the upper end of the support tube (27); the lower end of the positioning rod (28) is inserted into the insert hole; a second spring (29) is sleeved on the rod wall of the positioning rod (28); and the two ends of the second spring (29) are fixedly connected to the positioning rod (28) and the support tube (27), respectively.

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