Hierarchical supporting structure for deep foundation pit of dock

Abstract

The invention relates to the technical field of deep foundation pit supporting, in particular to a dock deep foundation pit grading supporting structure which comprises a profile steel supporting body, brackets are arranged at the two ends of the profile steel supporting body, and a movable connecting base is arranged at one end of the profile steel supporting body. A multi-stage supporting and fixing mechanism facilitating adjustment of pre-pressing of the multi-stage support is arranged between the movable connecting base and the inserting plate, and a middle section supporting and fixing mechanism facilitating anti-bending supporting of the profile steel support body is arranged on the profile steel support body. According to the graded supporting structure for the deep foundation pit of the dock, the multiple stages of supporting and fixing mechanisms are installed between the movable connecting base and the inserting plate, so that the inserting plate is conveniently fixed in a non-return mode in the outward moving process of the inserting plate and the movable end, and therefore supporting of different strength grades is conducted on the foundation pit under the assistance of an external hydraulic rod; and a middle section supporting and fixing mechanism is arranged at the terminal of the profile steel supporting main body, so that when the profile steel supporting main body supports a long foundation pit, the middle section is supported in an auxiliary mode, and the middle section is prevented from being bent due to gravity in the supporting process.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of deep foundation pit support, in particular to a grading support structure for a deep foundation pit of a dock. BACKGROUND

[0002] A dock is a dock-like building for repairing and building ships. The ship enters and exits through water filling, and can be operated on a dry bottom after draining. The most common dry dock has three walls, and the ship bottom is exposed for maintenance after the water is pumped out. When building a dry dock, a foundation pit usually needs to be excavated, and support must be provided. Foundation pit support can prevent soil collapse, control deformation, and protect surrounding facilities. The prior art does not have a structure for grading self-locking pre-pressing of profile steel support and mid-section support of profile steel support, so that the existing profile steel support for foundation pit needs to use a hydraulic rod to push the profile steel support body and the movable end to pre-press the foundation pit. After the hydraulic rod is stretched to apply pressure, a limiting pin needs to be manually added to lock the movable end to prevent it from moving backward and reducing the pre-pressing pressure. At the same time, when the profile steel support is used to support a longer and deeper foundation pit, the profile steel support is easily bent due to its long length. The bending will continue to increase over time and affect the support and pre-pressing. If a steel structure is used for support, it needs to be customized according to the distance between the support position and the bottom of the foundation pit. The subsequent use of the customized structure will also be limited. Based on the shortcomings of the prior art, the present application designs a grading support structure for a deep foundation pit of a dock. SUMMARY

[0003] The present application provides a grading support structure for a deep foundation pit of a dock, which has the advantages of grading self-locking pre-pressing of profile steel support and mid-section support of profile steel support.

[0004] The present application provides the following technical solution: a grading support structure for a deep foundation pit of a dock, comprising a profile steel support body, wherein both ends of the profile steel support body are provided with brackets, one end of the profile steel support body is provided with a movable connecting seat, a slot is formed in the movable connecting seat, a plug-in plate is inserted and arranged in the slot, the outer end of the plug-in plate is fixedly connected with a movable end, a multi-stage support pre-pressing adjustment mechanism is arranged between the movable connecting seat and the plug-in plate, and a mid-section support mechanism is arranged on the profile steel support body to prevent the profile steel support body from being bent. A multi-stage support mechanism includes a movable groove, a rotating seat, a locking plate, a check arm, a locking hole, a spring, a locking pin, and a check groove. The movable groove is formed through one side of the movable connecting seat. The rotating seat is fixedly connected to the surface of the movable connecting seat outside the movable groove. The locking plate is fixedly connected to one side of the rotating seat. The check arm is rotatably connected to the rotating seat. The locking hole is formed through the check arm. The spring is fixedly connected between the locking hole and the movable connecting seat. The locking pin is inserted into the locking hole. The check groove is formed on the locking plate, and the two sets of check grooves on the same side are staggered. The two sets of check arms on the same side are also staggered.

[0005] As a preferred embodiment of the present invention, the mid-section support mechanism includes a U-shaped component, an L-shaped limiting plate, a second bolt, a top connecting seat, a first threaded post, a bidirectional threaded sleeve, a second threaded post, and a bottom support seat. The U-shaped component is inserted into the bottom and both sides of the steel support body. The L-shaped limiting plate is located at the top of the U-shaped component. The second bolt is threaded through and inserted into the U-shaped component and the L-shaped limiting plate. The top connecting seat is fixedly connected to the lower surface of the U-shaped component. The first threaded post is fixedly connected to the lower surface of the top connecting seat. The bidirectional threaded sleeve is threaded onto the first threaded post. The second threaded post is threaded onto the bottom end of the bidirectional threaded sleeve. The bottom support seat is fixedly connected to the bottom end of the second threaded post.

[0006] As a preferred embodiment of the present invention, the two ends of the steel support body are provided with connecting holes, the end of the steel support body away from the movable connecting seat is provided with a fixed end, and a first bolt is provided between the steel support body and the fixed end.

[0007] As a preferred embodiment of the present invention, a reinforcing plate is fixedly connected to the inner side of the bracket, and a buckle is fixedly connected to the outer side of the bracket.

[0008] As a preferred embodiment of the present invention, the check arm is rotatably connected in the movable groove, and the check arm is movably engaged in the check groove.

[0009] As a preferred embodiment of the present invention, the locking pin is also inserted into the lock plate, and the locking pin can be simultaneously inserted into the lock hole and the lock plate to lock the anti-return arm.

[0010] As a preferred embodiment of the present invention, the L-shaped limiting plate is snapped onto the steel support body.

[0011] As a preferred embodiment of the present invention, the movable end is mounted on the bracket.

[0012] As a preferred embodiment of the present invention, the first bolt is also fixedly connected between the steel support body and the movable connecting seat.

[0013] As a preferred embodiment of the present invention, the reinforcing plates are respectively disposed on both sides of the fixed end and both sides of the movable connecting seat.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. This dry dock deep foundation pit graded support structure uses two sets of brackets fixed to sheet piles on both sides of the foundation pit with fasteners. Then, the steel support body, fixed end, movable connecting seat, insert plate, and both ends of the movable end, assembled with the first bolt, are placed on the left and right brackets. At this time, the hydraulic rod is placed between the movable end and the movable connecting seat and activated to extend it. When the hydraulic rod extends, the insert plate and the movable end will be pulled out from the inside of the slot, extending the combined length of the movable connecting seat, insert plate, and movable end, while also adding pre-stressing treatment to the foundation pit. During the outward movement of the insert plate, the check groove also moves outward, and the internal inclined surface allows the check arm to slide on the check groove and the insert plate. After the pre-stressing pressure reaches the required pressure, the check arm can automatically lock into the corresponding check groove under the push of the spring to perform check-back treatment on the insert plate and the movable end. This device facilitates graded pre-stressing support of the foundation pit.

[0015] 2. This graded support structure for the deep foundation pit of the dock involves fitting a U-shaped component onto the main steel support body from bottom to top, then placing an L-shaped limiting plate on the main steel support body and connecting and fixing the L-shaped limiting plate to the U-shaped component using a second bolt. At this time, the remaining components at the bottom of the U-shaped component are connected to the main steel support body. Then, without rotating the fixed bottom support seat, the bidirectional threaded sleeve is turned forward to unscrew the first and second threaded posts from the inside until the bottom support seat contacts the bottom of the foundation pit. At this point, the second threaded post, the bidirectional threaded sleeve, and the first threaded post can support the U-shaped component and the main steel support body. This device facilitates the support of the middle section of the main steel support body. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the graded support structure for the foundation pit of the present invention; Figure 3 This is a schematic diagram of the connection structure between the steel support and the bracket of the present invention; Figure 4 This is a schematic diagram of the connection structure between the steel support and the movable connecting seat of the present invention; Figure 5 This is a schematic diagram of the connection structure between the movable connecting seat and the multi-level support mechanism of the present invention; Figure 6 This is a schematic diagram of the unfolded structure of the steel support body and the middle section support mechanism of the present invention.

[0017] In the diagram: 1. Steel support body; 101. Connecting hole; 102. Fixed end; 103. First bolt; 104. Movable connecting seat; 105. Slot; 106. Insert plate; 107. Movable end; 2. Bracket; 201. Reinforcing plate; 202. Buckle; 3. Multi-stage support mechanism; 301. Movable groove; 302. Rotating seat; 303. Locking plate; 304. Check arm; 305. Locking hole; 306. Spring; 307. Locking pin; 308. Check groove; 4. Middle section support mechanism; 401. U-shaped part; 402. L-shaped limiting plate; 403. Second bolt; 404. Top connecting seat; 405. First threaded post; 406. Bidirectional threaded sleeve; 407. Second threaded post; 408. Bottom support seat. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Please see Figure 1 - Figure 6 The deep foundation pit graded support structure for a shipyard includes a steel support body 1, with brackets 2 at both ends of the steel support body 1, and a movable connecting seat 104 at one end of the steel support body 1. A slot 105 is provided on the movable connecting seat 104, and an insert plate 106 is inserted into the slot 105. A movable end 107 is fixedly connected to the outer end of the insert plate 106. A multi-stage support mechanism 3 is provided between the movable connecting seat 104 and the insert plate 106 to facilitate adjustment of the multi-stage support preload. The support body 1 is provided with a middle section support mechanism 4 to facilitate the anti-bending support of the steel support body 1. The two ends of the steel support body 1 are provided with connection holes 101. The end of the steel support body 1 away from the movable connecting seat 104 is provided with a fixed end 102. A first bolt 103 is provided between the steel support body 1 and the fixed end 102. The movable end 107 is mounted on the bracket 2. The first bolt 103 is also fixedly connected between the steel support body 1 and the movable connecting seat 104.

[0020] Please see Figure 3 The inner side of the bracket 2 is fixedly connected with a reinforcing plate 201, and the outer side of the bracket 2 is fixedly connected with a buckle 202. The reinforcing plates 201 are respectively set on both sides of the fixed end 102 and both sides of the movable connecting seat 104.

[0021] Please see Figure 5The multi-stage support mechanism 3 includes a movable groove 301, a rotating seat 302, a locking plate 303, a check arm 304, a locking hole 305, a spring 306, a locking pin 307, and a check groove 308. The movable groove 301 is formed through one side of the movable connecting seat 104. The rotating seat 302 is fixedly connected to the surface of the movable connecting seat 104 outside the movable groove 301. The locking plate 303 is fixedly connected to one side of the rotating seat 302. The check arm 304 is rotatably connected to the rotating seat 302. The locking hole 305 is formed through the check arm 304. The spring 306... 6 is fixedly connected between the lock hole 305 and the movable connecting seat 104. The locking pin 307 is inserted into the lock hole 305. The check groove 308 is opened on the insert plate 106, and the two sets of check grooves 308 on the same side are staggered. The two sets of check arms 304 on the same side are also staggered. The check arm 304 is rotatably connected in the movable groove 301. The check arm 304 is movably locked in the check groove 308. The locking pin 307 is also inserted into the lock plate 303. The locking pin 307 can be inserted into both the lock hole 305 and the lock plate 303 to lock the check arm 304.

[0022] By setting up the movable slot 301, rotating seat 302, check arm 304 and check groove 308, the insert plate 106 and movable end 107 extending from the slot 105 are locked to prevent backflow, thereby maintaining the pre-pressure on the pit. By setting up the spring 306, the check arm 304 is pushed to always be locked in the check groove 308, and the check arm 304 can be pushed to quickly lock into the check groove 308 at different pre-pressure levels. By setting up the locking plate 303, locking hole 305 and locking pin 307, the check arm 304 can be rotated out of the check groove 308 and fixed, and the insert plate 106 can be reinserted into the slot 105 to reset.

[0023] Please see Figure 6 The intermediate support mechanism 4 includes a U-shaped component 401, an L-shaped limiting plate 402, a second bolt 403, a top connecting seat 404, a first threaded post 405, a bidirectional threaded sleeve 406, a second threaded post 407, and a bottom support seat 408. The U-shaped component 401 is inserted into the bottom and both sides of the steel support body 1. The L-shaped limiting plate 402 is located at the top of the U-shaped component 401. The second bolt 403 is threaded through and inserted into the U-shaped component 401 and the L-shaped limiting plate 402. The top connecting seat 404 is fixedly connected to the lower surface of the U-shaped component 401. The first threaded post 405 is fixedly connected to the lower surface of the top connecting seat 404. The bidirectional threaded sleeve 406 is threaded onto the first threaded post 405. The second threaded post 407 is threaded onto the bottom end of the bidirectional threaded sleeve 406. The bottom support seat 408 is fixedly connected to the bottom end of the second threaded post 407. The L-shaped limiting plate 402 is snapped onto the steel support body 1.

[0024] By setting up a U-shaped component 401, an L-shaped limiting plate 402, and a second bolt 403, the U-shaped component 401 can be connected and fixed to the steel support body 1. At the same time, the separate structure of the U-shaped component 401 and the L-shaped limiting plate 402 also facilitates disassembly and assembly on the steel support body 1. By setting up a first threaded post 405, a bidirectional threaded sleeve 406, and a second threaded post 407, the distance between the U-shaped component 401 and the bottom support seat 408 can be adjusted to adapt to different depths of foundation pits and support the steel support body 1. By setting up a top connecting seat 404 and a first threaded post 405, which are separate structures as shown in the figure, when the first threaded post 405, the bidirectional threaded sleeve 406, and the second threaded post 407 are still insufficient to support the foundation pit depth after being fully extended, an extension rod can be added between the top connecting seat 404 and the first threaded post 405.

[0025] Working principle: When the graded support structure for deep foundation pits in docks is used, in the initial state, connecting holes 101 are first opened at both ends of the steel support body 1. Fixed ends 102 and movable connecting seats 104 are connected to both ends of the steel support body 1 through the connecting holes 101 and the first bolts 103. The fixed ends 102 and movable connecting seats 104 are mounted on the brackets 2 on the inner and outer sides, where reinforcing plates 201 and fasteners 202 are installed, to support the steel support body 1. At the same time, the steel support body 1, fixed ends 102 and movable connecting seats 104 are used to support the foundation pit. An insert plate 106 and a movable end 107 are inserted into the movable connecting seat 104. A multi-level support mechanism 3 is installed between the movable connecting seat 104 and the insert plate 106 to prevent the insert plate 106 from moving outward during the movement of the insert plate 106 and the movable end 107. This allows for different strength levels of support for the foundation pit with the assistance of external hydraulic rods. A middle section support mechanism 4 is provided at the end of the steel support body 1 to provide auxiliary support for the middle section when supporting a long foundation pit, preventing it from bending due to gravity during the support process. When graded preloading support is required for the foundation pit, firstly, the two sets of brackets 2 are fixed to the sheet piles on both sides of the foundation pit using fasteners 202. Then, the two ends of the steel support body 1, fixed end 102, movable connecting seat 104, insert plate 106, and movable end 107 assembled using the first bolt 103 are placed on the left and right brackets 2. At this time, the hydraulic rod is placed between the movable end 107 and the movable connecting seat 104 and activated to extend it. When the hydraulic rod extends, the insert plate 106 and the movable end 107 will be pulled out from the inside of the slot 105, extending the length of the support. The combination of movable connecting seat 104, insert plate 106 and movable end 107 increases the length of the foundation pit and adds pre-compression treatment. During the outward movement of insert plate 106, check groove 308 also moves outward and uses its internal inclined surface to make check arm 304 slide on check groove 308 and insert plate 106. After the pre-compression pressure reaches the required pressure, check arm 304 can automatically be inserted into the corresponding check groove 308 under the push of spring 306 to perform check-back treatment on insert plate 106 and movable end 107. This device facilitates graded pre-compression support of foundation pit.

[0026] When it is necessary to support the middle section of the steel support body 1, firstly, the U-shaped part 401 is fitted onto the steel support body 1 from bottom to top. Then, the L-shaped limiting plate 402 is placed on the steel support body 1 and the L-shaped limiting plate 402 is connected and fixed to the U-shaped part 401 by the second bolt 403. At this time, the remaining parts at the bottom of the U-shaped part 401 are connected to the steel support body 1. Then, without rotating the fixed bottom support base 408, the bidirectional threaded sleeve 406 is turned forward to make the first threaded post 405 and the second threaded post 407 unscrew from the inside until the bottom support base 408 contacts the bottom of the pit. At this time, the second threaded post 407, the bidirectional threaded sleeve 406 and the first threaded post 405 can support the U-shaped part 401 and the steel support body 1. This device facilitates the support of the middle section of the steel support body 1.

[0027] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0028] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A graded support structure for a deep foundation pit in a shipyard, comprising a steel support body (1), characterized in that: The steel support body (1) is provided with brackets (2) at both ends, and a movable connecting seat (104) is provided at one end of the steel support body (1). A slot (105) is provided on the movable connecting seat (104), and a plate (106) is inserted into the slot (105). A movable end (107) is fixedly connected to the outer end of the plate (106). A multi-stage support mechanism (3) is provided between the movable connecting seat (104) and the plate (106) to facilitate adjustment of the multi-stage support preload. A middle section support mechanism (4) is provided on the steel support body (1) to facilitate anti-bending support of the steel support body (1). A multi-stage support mechanism (3) includes a movable groove (301), a rotating seat (302), a locking plate (303), a check arm (304), a locking hole (305), a spring (306), a locking pin (307), and a check groove (308). The movable groove (301) is formed through one side of the movable connecting seat (104). The rotating seat (302) is fixedly connected to the surface of the movable connecting seat (104) outside the movable groove (301). The locking plate (303) is fixedly connected to the rotating seat (304). On one side of 02), the check arm (304) is rotatably connected to the rotating seat (302), the lock hole (305) is opened through the check arm (304), the spring (306) is fixedly connected between the lock hole (305) and the movable connecting seat (104), the locking pin (307) is inserted into the lock hole (305), the check groove (308) is opened on the insert plate (106), and the two sets of check grooves (308) on the same side are staggered, and the two sets of check arms (304) on the same side are also staggered.

2. The graded support structure for deep foundation pits in dry docks according to claim 1, characterized in that: The intermediate support mechanism (4) includes a U-shaped component (401), an L-shaped limiting plate (402), a second bolt (403), a top connecting seat (404), a first threaded post (405), a bidirectional threaded sleeve (406), a second threaded post (407), and a bottom support seat (408). The U-shaped component (401) is inserted into the bottom and both sides of the steel support body (1). The L-shaped limiting plate (402) is located at the top of the U-shaped component (401). The second bolt (403) is threaded through and inserted into the bottom support seat (408). The top connecting seat (404) is fixedly connected to the lower surface of the U-shaped part (401) and the L-shaped limiting plate (402). The first threaded post (405) is fixedly connected to the lower surface of the top connecting seat (404). The bidirectional threaded sleeve (406) is threaded onto the first threaded post (405). The second threaded post (407) is threaded onto the bottom end of the bidirectional threaded sleeve (406). The bottom support seat (408) is fixedly connected to the bottom end of the second threaded post (407).

3. The graded support structure for deep foundation pits in dry docks according to claim 1, characterized in that: The steel support body (1) has connection holes (101) at both ends, and a fixed end (102) is provided at the end of the steel support body (1) away from the movable connecting seat (104). A first bolt (103) is provided between the steel support body (1) and the fixed end (102).

4. The graded support structure for deep foundation pits in dry docks according to claim 1, characterized in that: The bracket (2) is fixedly connected to the inner side with a reinforcing plate (201), and the bracket (2) is fixedly connected to the outer side with a buckle (202).

5. The graded support structure for deep foundation pits in dry docks according to claim 1, characterized in that: The check arm (304) is rotatably connected in the movable groove (301), and the check arm (304) is movably engaged in the check groove (308).

6. The graded support structure for deep foundation pits in dry docks according to claim 1, characterized in that: The locking pin (307) is also inserted into the lock plate (303). The locking pin (307) can be inserted into both the lock hole (305) and the lock plate (303) to lock the check arm (304).

7. The graded support structure for deep foundation pits in dry docks according to claim 2, characterized in that: The L-shaped limiting plate (402) is snapped onto the steel support body (1).

8. The graded support structure for deep foundation pits in dry docks according to claim 3, characterized in that: The movable end (107) is mounted on the bracket (2).

9. The graded support structure for deep foundation pits in dry docks according to claim 3, characterized in that: The first bolt (103) is also fixedly connected between the steel support body (1) and the movable connecting seat (104).

10. The graded support structure for deep foundation pits in dry docks according to claim 4, characterized in that: The reinforcing plates (201) are respectively disposed on both sides of the fixed end (102) and both sides of the movable connecting seat (104).

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