Top soil retaining device for pipe-jacking open caisson in loess area

Abstract

The utility model relates to the technical field of pipe jacking construction, in particular to a loess area pipe jacking open caisson top soil retaining device which comprises a hollow square whole, the square whole comprises two long baffles, two short baffles and four corner connecting pieces, the two long baffles are arranged in parallel in the front-back direction, the two short baffles are arranged at intervals in the left-right direction and located between the two long baffles, and the four corner connecting pieces are connected with the two short baffles. Each long baffle is connected with the adjacent short baffle through a corner connecting piece; the square whole is arranged to serve as a supplementary part of the top of the open caisson, a small amount of soil pressure on the periphery of the top can be safely resisted, earth excavation and backfilling can be effectively reduced, the baffles and the corner connecting pieces can be machined in a factory mode, only assembling needs to be conducted on a construction site, implementation is high during assembling, construction is easy and fast, the construction time can be saved, and the construction efficiency is improved. The construction period can be effectively shortened; after construction is completed, the square integral baffles and the corner connecting pieces can be dismantled and reused.

Description

Technical Field

[0001] The utility model relates to the technical field of pipe jacking construction, in particular to a soil retaining device at the top of a pipe jacking caisson in a loess area. Background Art

[0002] As a trenchless direct buried pipeline construction technology, pipe jacking is widely favored in municipal pipeline construction. During pipe jacking construction, the pipe jacking working well is generally constructed using caisson technology. In order to save project costs, the pipe jacking working well will be converted into an inspection well after the pipe jacking construction is completed. During the conversion process, the top plate and well shaft will be installed. The height of the well shaft and the top plate varies from 1.8m to 2.5m. Therefore, there is a height difference of 1.8m to 2.5m between the top of the caisson and the ground.

[0003] During conventional construction, slope excavation is performed around the top of the caisson to prevent landslides and surrounding soil from falling into the caisson, potentially causing safety accidents. After the pipe jacking and inspection well renovation are complete, backfilling is performed, which involves significant excavation and backfilling. Furthermore, the slope created by the slope excavation increases the difficulty of transporting soil during pipe jacking, increasing the construction period. Utility Model Content

[0004] The utility model provides a soil retaining device for the top of a pipe jacking caisson in the loess region, which overcomes the shortcomings of the above-mentioned existing technologies and can effectively solve the problem that the slope formed by excavation around the top of the caisson during conventional pipe jacking construction increases the construction difficulty and leads to a long construction period.

[0005] In order to solve the above problems, the utility model discloses a soil retaining device for the top of a jacking pipe caisson in a loess region, comprising a hollow square body, which comprises two long baffles, two short baffles and four corner connectors. The two long baffles are arranged parallel to each other in front and back, and the two short baffles are arranged at intervals on the left and right and are located between the two long baffles. Each long baffle is connected to the adjacent short baffle by a corner connector.

[0006] The long baffle and the short baffle have the same structure. The long baffle includes a panel, transverse ribs, vertical ribs and edge reinforcement ribs. The panel is provided with edge reinforcement ribs all around. A transverse rib is provided in the center of one side of the panel located on the inner side of the square body. A plurality of vertical ribs perpendicular to the transverse ribs are provided on the left and right sides of the panel located on the inner side of the square body.

[0007] A plurality of reinforcing supports are provided at intervals in the upper and lower parts of the corner connector, and a through connecting hole is provided in the center of the upper side of each reinforcing support.

[0008] A lifting ring is provided on the top of each of the long baffles, short baffles and corner connectors.

[0009] Each of the above-mentioned edge reinforcement ribs is provided with a plurality of punching holes at intervals.

[0010] A plurality of corner braces are provided on the panel at each of the above-mentioned edge reinforcement rib positions.

[0011] The above-mentioned transverse ribs, vertical ribs and edge reinforcements are all 120 channel steel, and the transverse ribs, vertical ribs and edge reinforcements are all welded to the panel.

[0012] The above-mentioned corner connectors and reinforcement braces are made of 5mm thick steel plates.

[0013] The utility model sets a square whole, places the square whole inside the caisson, and uses the part above the ground as the supplementary part of the top of the caisson, which can safely withstand a small amount of soil pressure around the top and effectively reduce earth excavation and backfilling. Among them, the baffles and corner connectors can be factory-processed and only need to be assembled at the construction site. The assembly is easy to implement and the construction is simple and fast, which can save construction time and effectively shorten the construction period. After the construction is completed, the baffles and corner connectors of the square whole can be dismantled and reused, so that construction storage will not take up a lot of space, saving engineering costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The specific implementation of the present invention will be further described in detail below with reference to the accompanying drawings.

[0015] Figure 1 It is a schematic diagram of the square overall structure of the utility model.

[0016] Figure 2 This is a schematic diagram of the long baffle structure of the present utility model.

[0017] Figure 3 This is a schematic structural diagram of the corner connector of the present invention.

[0018] In the figure: 1-long baffle, 2-short baffle, 3-corner connector, 4-panel, 5-transverse rib, 6-vertical rib, 7-edge reinforcement, 8-punch, 9-reinforcement support, 10-connection hole, 11-lifting ring, 12-corner support. DETAILED DESCRIPTION

[0019] The present invention is not limited by the following embodiments, and specific implementation methods can be determined based on the technical solution of the present invention and actual conditions.

[0020] The present invention will be further described below in conjunction with the embodiments and accompanying drawings:

[0021] like Figure 1-3As shown, a soil retaining device for the top of a jacking pipe caisson in a loess region includes a hollow square body, which includes two long baffles 1, two short baffles 2 and four corner connectors 3. The two long baffles 1 are arranged parallel to each other, and the two short baffles 2 are arranged at intervals and located between the two long baffles 1. Each long baffle 1 is connected to the adjacent short baffle 2 by a corner connector 3.

[0022] The long baffle 1 and the short baffle 2 have the same structure. The long baffle 1 includes a panel 4, transverse ribs 5, vertical ribs 6 and edge reinforcement ribs 7. The panel 4 is provided with edge reinforcement ribs 7 on all sides. The panel 4 is provided with a transverse rib 5 in the center of one side of the inner side of the square body. The panel 4 is provided with a plurality of vertical ribs 6 perpendicular to the transverse ribs 5 at intervals on the left and right sides of one side of the inner side of the square body.

[0023] A plurality of reinforcing struts 9 are provided at intervals in the upper and lower parts of the corner connector 3 , and a through connecting hole 10 is provided in the center of the upper side of each reinforcing strut 9 .

[0024] As required, the corner connector 3 and reinforcement braces 9 are both made of 5mm thick steel plate. The reinforcement braces 9 are spaced 30cm apart within the corner connector 3. Punch holes 8 are provided along the edges of the corner connector 3 at 50cm intervals. These oblong holes are 22mm x 30mm, facilitating connection to the baffle with M20 high-strength bolts. Connection holes 10 on the reinforcement braces 9 allow for connection to another set of vertical reinforcement braces 9 using M20 high-strength bolts, increasing the overall height of the square. The corner connector 3 is at the same height as the baffle, facilitating installation.

[0025] As needed, the transverse ribs 5, vertical ribs 6, and edge reinforcement ribs 7 are all made of 120 channel steel and are welded to the panel 4. The edge reinforcement ribs 7 are provided with punched holes 8 at 50cm intervals. The specific size of the punched holes 8 is 22mm*30mm oblong holes to facilitate the bolt connection of adjacent baffles.

[0026] like Figure 1-3 As shown, each long baffle 1, short baffle 2 and corner connector 3 is provided with a lifting ring 11 on the top, thereby facilitating lifting.

[0027] like Figure 1-3 As shown, a plurality of angle braces 12 are provided on the panel 4 at each edge reinforcement rib 7 position. The angle braces 12 are made of 5mm thick steel plates to improve the fixing strength of the edge reinforcement rib 7.

[0028] In actual use, after the top pipe caisson sinks below the ground, a square integral body of the same size as the caisson is selected on its top. The square integral baffle and the corner connector 3 are connected with M20 high-strength bolts. After assembly is completed, it sinks together with the caisson construction. After the caisson is in place, the top of the baffle needs to be 50 cm higher than the ground. If the height is less than 50 cm, an additional layer should be added on the top to be more than 50 cm higher than the ground. In this way, the part above the ground is used as a supplementary part of the caisson top, which can safely withstand a small amount of soil pressure around the top and effectively reduce earth excavation and backfilling. Among them, the baffle and corner connector 3 can be factory-processed and only need to be assembled at the construction site. The assembly is easy to implement and the construction is simple and quick, which can save construction time and effectively shorten the construction period. After construction is completed, the square integral baffle and corner connector 3 can be removed and reused. Therefore, construction storage will not take up a lot of space, saving engineering costs.

Claims

1. A soil retaining device at the top of a jacking pipe caisson in a loess region, characterized in that: The hollow square structure includes two long baffles, two short baffles, and four corner connectors. The two long baffles are arranged parallel to each other, and the two short baffles are arranged at intervals between the two long baffles. Each long baffle is connected to the adjacent short baffle by a corner connector. The long baffle and the short baffle have the same structure. The long baffle includes a panel, transverse ribs, vertical ribs and edge reinforcement ribs. The panel is provided with edge reinforcement ribs all around. A transverse rib is provided in the center of one side of the panel located on the inner side of the square body. A plurality of vertical ribs perpendicular to the transverse ribs are provided on the left and right sides of the panel located on the inner side of the square body. A plurality of reinforcing supports are provided at intervals in the upper and lower parts of the corner connector, and a through connecting hole is provided in the center of the upper side of each reinforcing support.

2. The top retaining device for a jacking pipe caisson in a loess region according to claim 1, characterized in that: There is a lifting ring on the top of each long baffle, short baffle and corner connector.

3. A soil retaining device for the top of a jacking pipe caisson in a loess region according to claim 1 or 2, characterized in that: A plurality of punching holes are arranged at intervals on each edge reinforcement rib.

4. A soil retaining device for the top of a jacking pipe caisson in a loess region according to claim 1 or 2, characterized in that: There are multiple corner braces on the panel at each edge reinforcement location.

5. The top retaining device for a jacking pipe caisson in loess areas according to claim 3 is characterized in that: There are multiple corner braces on the panel at each edge reinforcement location.

6. A soil retaining device for the top of a jacking pipe caisson in a loess region according to claim 1, 2 or 5, characterized in that: The transverse ribs, vertical ribs and edge reinforcements are all 120 channel steel, and the transverse ribs, vertical ribs and edge reinforcements are all welded to the panel.

7. The top retaining device for a jacking pipe caisson in a loess region according to claim 3, characterized in that: The transverse ribs, vertical ribs and edge reinforcements are all 120 channel steel, and the transverse ribs, vertical ribs and edge reinforcements are all welded to the panel.

8. The top retaining device for a jacking pipe caisson in loess areas according to claim 4, characterized in that: The transverse ribs, vertical ribs and edge reinforcements are all 120 channel steel, and the transverse ribs, vertical ribs and edge reinforcements are all welded to the panel.

9. A soil retaining device for the top of a jacking pipe caisson in a loess region according to claim 1, 2, 5, 7 or 8, characterized in that: Corner connectors and reinforcement braces are made of 5mm thick steel plates.

10. The top retaining device for a jacking pipe caisson in loess areas according to claim 6, characterized in that: Corner connectors and reinforcement braces are made of 5mm thick steel plates.

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