Multi-layer steel enclosing purlin assembling and adjusting structure for deep and large foundation pit

Abstract

The invention relates to the technical field of foundation pit supporting, in particular to a deep and large foundation pit multi-layer steel enclosing purlin assembling and adjusting structure which comprises T-shaped frames, two T-shaped frames form a group, and a plurality of hanging holes which are linearly distributed at equal intervals are formed in rib plates of the T-shaped frames; a steel corbel is arranged between the two T-shaped frames in one group, the steel corbel comprises two supporting plates, and the two supporting plates are in horizontal sliding connection through a guide shaft rod; a steel enclosing purlin is placed on the upper surface of the supporting plate; the device has the beneficial effects that the vertically-arranged T-shaped frame is welded and fixed to the inner side wall of the steel sheet pile at the designated position in advance, the two supporting plates are moved away from each other, and the hanging shafts and the supporting shafts can be inserted into hanging holes in the corresponding positions of the T-shaped frame correspondingly, so that hanging installation of the supporting plates is achieved; the supporting plates and the steel enclosing purlins of the device are both of detachable structures, installation is stable, disassembly is convenient, and repeated use is facilitated.

Description

Technical Field

[0001] This invention relates to the field of foundation pit support technology, specifically to a multi-layer steel waler assembly and adjustment structure for deep and large foundation pits. Background Technology

[0002] In the support engineering of deep foundation pits, steel sheet piles are often used as the retaining structure, and multiple layers of steel walers are set in the vertical direction on the inner side to support and stabilize the steel or concrete support system on the inner side of the foundation pit.

[0003] In the prior art, Chinese invention with announcement number CN119981110A discloses a construction method for multi-layer steel walers inside a steel pipe pile cofferdam. The method mainly involves installing steel walers through multi-layer support brackets. The welding and forming of each layer of steel walers are carried out at the top of the steel pipe pile cofferdam, which greatly improves the convenience of construction and makes it easier to check the construction quality of the steel walers.

[0004] Currently, traditional steel walers and steel brackets are mostly fixed by welding to ensure installation stability. This method is difficult, requires high quality, has low work efficiency, and is prone to quality and safety hazards. Furthermore, disassembling the steel walers and brackets after construction is difficult, and repeated cutting and disassembly can easily damage the structure, making it difficult to reuse and seriously affecting safety. Therefore, this invention proposes a multi-layer steel waler assembly and adjustment structure for deep and large foundation pits to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide an assembly and adjustment structure for multi-layer steel walers in deep and large foundation pits, so as to solve the problems of difficulty in disassembling and reusing traditional steel walers and steel brackets after welding and fixing, as well as the problems of work efficiency, quality and safety mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a multi-layer steel waler assembly and adjustment structure for deep and large foundation pits, comprising: The T-shaped frame is provided in pairs, and the ribs of the T-shaped frame are provided with multiple hanging holes that are linearly distributed at equal intervals. A steel bracket is provided between two T-shaped frames in a set. The steel bracket includes two support plates, which are horizontally slidably connected by a guide shaft. A boss is fixed at the corner of the support plate, and a suspension shaft is fixed on the side of the boss. A support screw is provided on the lower surface of the support plate and is rotatably connected thereto. A support shaft is provided at the lower end of the support screw. The suspension shaft and the support shaft are respectively inserted into two suspension holes. The T-shaped frame, the support plate, and the support screw form a right triangle. A steel waler is placed on the upper surface of the support plate.

[0007] Preferably, the steel purlin includes two purlin side plates, and an I-beam is fixed between the two purlin side plates. There are two upper and lower layers of the I-beam. A suspension hole is opened at the upper edge of one purlin side plate. A turnbuckle is provided between the steel purlin and the T-shaped frame. Both ends of the turnbuckle are provided with S-shaped hooks, and the two S-shaped hooks are respectively hung on the suspension hole and the hanging hole.

[0008] Preferably, the distance between adjacent two support plates is greater than the total length of the two suspension shafts. Both ends of the suspension shaft and the support shaft are fastened to the rib plate of the T-shaped frame by nuts.

[0009] Preferably, the T-shaped frame is installed on the steel sheet pile. There are multiple steel sheet piles. Adjacent two steel sheet piles are arranged in the reverse direction, and adjacent two steel sheet piles are tightly locked and connected through the lock seams at the edges of the steel sheet piles. Two T-shaped frames in a group are respectively welded and fixed on the inner side walls of the two steel sheet piles. Two T-shaped frames in a group are located on the same side of the retaining pile composed of multiple steel sheet piles.

[0010] Preferably, there are two guiding shaft rods, and the two guiding shaft rods are parallel to each other. Guide bushings are movably sleeved on the outer sides of both ends of the guiding shaft rods, and the two guide bushings at both ends of the guiding shaft rod are respectively fixed on the lower surfaces of the two support plates.

[0011] Preferably, adjusting sleeves are sleeved on the outer sides of both ends of the support screw rod through threads. A rotating seat is fixed at one end of the adjusting sleeve away from the support screw rod. The rotating seat located at the upper end of the support screw rod is rotatably installed on the lower surface of the support plate. The support shaft is fixedly installed on the side surface of the support shaft located at the lower end of the support screw rod.

[0012] Preferably, a limiting convex plate is fixed on the upper surface of the support plate. The limiting convex plate is located between the two purlin side plates. Through grooves are respectively formed through the limiting convex plate and the I-beam in the lower layer between the two purlin side plates. A vertical movable shaft rod is movably penetrated through the middle of the support plate. The upper end of the movable shaft rod extends between the upper and lower layers of I-beams. A limiting clamping plate is fixed at the upper end of the movable shaft rod.

[0013] Preferably, the cross section of the limiting convex plate is in a shape of "匚" with the opening downward, and chamfers are provided at both corners on both sides of the limiting convex plate. A reinforcing rib plate is fixed on the inner side wall in the middle of the limiting convex plate. The reinforcing rib plate is along the length direction of the steel purlin, and the lower edge of the reinforcing rib plate is welded and fixed to the upper surface of the support plate.

[0014] Preferably, the limiting clamping plate and the movable shaft rod form a "T" shape. Through holes are opened at both ends of the limiting clamping plate. Limiting convex blocks are movably inserted into the through holes, and the limiting convex blocks are fixed on the I-beam in the lower layer.

[0015] Preferably, a control knob is fixed at the lower end of the movable shaft. After the movable shaft rotates 90 degrees, the limiting plate passes through the inner cavity of the through groove from top to bottom and is housed between the limiting protrusion and the support plate.

[0016] Compared with the prior art, the beneficial effects of the present invention are: This invention involves pre-welding and fixing a vertically arranged T-shaped frame to the inner wall of a sheet pile at a designated location. The T-shaped frame has suspension holes on its ribs. Support plates are arranged in pairs, with a guide shaft maintaining a sliding connection between them. By moving the two support plates away from each other, the suspension shaft and support shaft can be inserted into the corresponding suspension holes on the T-shaped frame, thus suspending the support plates. A steel waler is placed on the surface of the support plates and secured with turnbuckles and S-hooks to improve its installation stability. Both the support plates and the steel waler are detachable, ensuring stable installation, easy disassembly, and repeated use. Attached Figure Description

[0017] Figure 1 This is a three-dimensional schematic diagram of the overall structure of the present invention; Figure 2 This is a top view of the overall structure of the present invention; Figure 3 This is a side view of the T-shaped frame structure of the present invention; Figure 4 This is a schematic diagram of the installation of the steel waler structure of the present invention; Figure 5 This is a schematic diagram of the installation of the support plate structure of the present invention; Figure 6 This is a three-dimensional schematic diagram of the support plate structure of the present invention; Figure 7 This is a schematic diagram of the connection between the steel waler and the support plate structure of the present invention.

[0018] In the diagram: 1. Sheet pile; 2. T-frame; 21. Suspension hole; 3. Support plate; 31. Boss; 311. Suspension shaft; 32. Support screw; 321. Adjusting sleeve; 322. Rotating seat; 323. Support shaft; 33. Guide shaft rod; 34. Guide bushing; 35. Limiting protrusion; 36. Movable shaft rod; 361. Limiting clamp; 362. Control knob; 4. Waler side plate; 41. I-beam; 42. Suspension hole; 43. Through groove; 44. Limiting protrusion; 5. Turnbuckle; 51. S-hook. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the present invention clear and complete, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some, not all, embodiments of the present invention, and are merely illustrative of the embodiments of the present invention. They are not intended to limit 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.

[0020] Please see Figures 1 to 7 The present invention provides a technical solution: Example 1: A multi-layer steel waler assembly and adjustment structure for deep and large foundation pits, comprising: T-shaped frame 2.

[0021] Specifically, the T-shaped frame 2 is installed on the sheet pile 1. Two T-shaped frames 2 are arranged as a group. The ribs of the T-shaped frame 2 have multiple suspension holes 21 that are linearly distributed at equal intervals, such as... Figure 1 As shown, a certain gap is left between the upper end of the T-shaped frame 2 and the upper edge of the sheet pile 1, so that the pile head of the pile driver can be clamped. The T-shaped frame 2 is pre-welded and fixed to the sheet pile 1 at the designated position according to actual needs. Since the T-shaped frame 2 is a vertical strip, it will not hinder the pile driver from vertically inserting the sheet pile 1 into the soil. Secondly, a steel bracket is provided between the two T-shaped frames 2 in a set. The steel bracket includes two support plates 3, which are horizontally slidably connected by a guide shaft 33. The distance between the two support plates 3 can be slidably adjusted to accommodate the distance between the two T-shaped frames 2. A boss 31 is fixed at the corner of the support plate 3, and a suspension shaft 311 is fixed to the side of the boss 31. A support screw 32 is provided on the lower surface of the support plate 3 and is rotatably connected to it. A support shaft 323 is provided at the lower end of the support screw 32. The suspension shaft 311 and the support shaft 323 are respectively inserted into two suspension holes 21. The T-shaped frame 2, the support plate 3, and the support screw 32 form a right triangle. Figure 5 and Figure 6 As shown, the suspension shaft 311 can be used to suspend the support plate 3, and the support shaft 323 can be used to support the support screw 32. In turn, the support screw 32 supports the support plate 3, ensuring that the entire steel bracket and the T-shaped frame 2 can maintain a stable connection. At the same time, the steel bracket itself and the T-shaped frame 2 can be disassembled to facilitate subsequent dismantling work. The steel bracket will not be damaged after dismantling and can be reused. A steel waler is placed on the upper surface of the support plate 3, such as... Figure 1 and Figure 2As shown, the steel waler is placed on the upper surface of the support plate 3. One side of the steel waler can just abut against the front of the steel sheet pile 1 between the two T-shaped frames 2, thus ensuring the stability of the steel waler. The steel waler and steel bracket of this device can be easily disassembled and installed, so that they can be reused multiple times.

[0022] To improve the installation stability of the steel waler, the steel waler of this application includes two waler side plates 4, with an I-beam 41 fixed between the two waler side plates 4. The I-beam 41 has upper and lower layers to ensure the structural stability of the entire steel waler. A suspension hole 42 is provided at the upper edge of one waler side plate 4. A turnbuckle 5 is provided between the steel waler and the T-shaped frame 2. Both ends of the turnbuckle 5 are provided with S-hooks 51. The turnbuckle 5 is a known existing structure, and its length can be adjusted. By adjusting the length of the turnbuckle 5, the two S-hooks 51 can be suspended on the suspension hole 21 and the suspension hole 42 respectively, thereby improving the installation stability of the steel waler. Figure 2 and Figure 4 As shown, the turnbuckle 5 is inclined, which not only provides suspension tension to the steel walers, but also pulls the two steel walers closer to each other to improve the splicing stability between the two steel walers.

[0023] To ensure the steel bracket can be removed from between the two T-shaped frames 2, the distance between two adjacent support plates 3 in this application is greater than the total length of the two suspension shafts 311. The ends of both the suspension shafts 311 and the support shafts 323 are fastened to the ribs of the T-shaped frame 2 with nuts. Figure 5 and Figure 6 As shown, the two support plates 3 can be brought close to each other, and when the two support plates 3 are in contact with each other, the suspension shaft 311 and the support shaft 323 can be separated from the suspension hole 21, which makes it easy to completely separate the support plate 3 from the T-shaped frame 2. At this time, the entire steel bracket can be removed from between the two T-shaped frames 2.

[0024] To avoid the T-shaped frame 2 obstructing the installation of the steel waler and steel bracket, multiple sheet piles 1 are provided in this application. Adjacent sheet piles 1 are arranged in opposite directions, and adjacent sheet piles 1 are locked together by interlocking slots at their edges. Figure 1 and Figure 2 As shown, the interlocking connection of multiple sheet piles 1 is a known existing technology. Two T-shaped frames 2 of one set are welded and fixed to the inner walls of two sheet piles 1 respectively. The two T-shaped frames 2 of one set are located on the same side of the retaining pile composed of multiple sheet piles 1, as shown. Figure 2 As shown, the T-shaped frame 2 is completely located inside the sheet pile 1. The support plate 3 and the steel waler will not interfere with the T-shaped frame 2 during installation, thus ensuring that the side of the steel waler can fit tightly against the front of the sheet pile 1.

[0025] To guide the relative sliding between the two support plates 3, this application provides two guide shafts 33, which are parallel to each other. Guide sleeves 34 are movably fitted onto the outer sides of both ends of each guide shaft 33, and the two guide sleeves 34 at both ends of the guide shaft 33 are respectively fixed to the lower surfaces of the two support plates 3. Figure 6 As shown, the guide bushing 34 and the guide shaft 33 cooperate to guide the relative sliding between the two support plates 3, ensuring that the two support plates 3 can only move closer or further apart in the horizontal direction, and that the two support plates 3 will not be misaligned. In addition, it should be noted that baffles are provided at both ends of the guide shaft 33 to prevent the guide shaft 33 from separating from the guide bushing 34.

[0026] To adjust the position of the support shaft 323, this application further includes adjusting sleeves 321 threaded onto the outer sides of both ends of the support screw 32. A rotating seat 322 is fixed to the end of the adjusting sleeve 321 furthest from the support screw 32. The rotating seat 322, located at the upper end of the support screw 32, is rotatably mounted on the lower surface of the support plate 3. The support shaft 323 is fixedly mounted on the side of the support shaft 323 located at the lower end of the support screw 32. Figure 5 and Figure 6 As shown, when the operator rotates the support screw 32, the distance between the two adjusting sleeves 321 can be adjusted, thereby adjusting the position of the support shaft 323, ensuring that the suspension shaft 311 and the support shaft 323 can pass through the suspension holes 21 at two different heights, thereby achieving the installation and positioning of the support plate 3.

[0027] To prevent misalignment of the two steel walers, this application also includes a limiting protrusion 35 fixed to the upper surface of the support plate 3. The limiting protrusion 35 is located between the two waler side plates 4. Figure 7 As shown, after the steel walers are hoisted and placed on the upper surface of the support plate 3 by the lifting equipment, the limiting protrusion 35 positions the steel walers in the width direction to ensure that the two steel walers will not be misaligned. Through slots 43 are provided through the limiting protrusion 35 and the lower layer of I-beams 41 located between the two waler side plates 4. A vertical movable shaft 36 is movably installed through the middle of the support plate 3. The upper end of the movable shaft 36 extends between the upper and lower layers of I-beams 41. A limiting plate 361 is fixed to the upper end of the movable shaft 36. The movable shaft 36 itself can slide up and down in the vertical direction and can also rotate, thereby changing the position of the limiting plate 361.

[0028] In order to improve the strength of the limit convex plate 35, the cross-section of the limit convex plate 35 of the present application is in a "C" shape with the opening facing downward, and chamfers are provided at both corners of the limit convex plate 35. The chamfers can be used to correct the position of the steel purlin, facilitating the placement of the steel purlin on the upper surface of the support plate 3 from top to bottom. A reinforcing rib plate is fixed on the inner side wall of the middle part of the limit convex plate 35 along the length direction of the steel purlin, and the lower edge of the reinforcing rib plate is fixedly welded to the upper surface of the support plate 3. The reinforcing rib plate is mainly used to improve the overall strength of the limit convex plate 35, preventing the steel purlin from pressing on the upper surface of the limit convex plate 35 and causing deformation of the limit convex plate 35.

[0029] In order to further improve the positioning effect of the steel purlin, the limit clamping plate 361 and the movable shaft rod 36 of the present application form a "T" shape. Through holes are provided at both ends of the limit clamping plate 361, and limit convex blocks 44 are movably inserted into the through holes. The limit convex blocks 44 are fixed to the lower-layer I-beam 41. A control knob 362 is fixed to the lower end of the movable shaft rod 36. After the movable shaft rod 36 rotates 90 degrees, the limit clamping plate 361 passes through the inner cavity of the through slot 43 from top to bottom and is received between the limit convex plate 35 and the support plate 3. When the mutually approaching ends of two steel purlins are respectively placed on the upper surfaces of two support plates 3, as Figure 4 shown, the turnbuckle 5 and the S-shaped hook 51 are installed, and then the turnbuckle 5 is screwed to make the two steel purlins approach each other until the ends of the two steel purlins are in contact with each other. After that, as Figure 7 shown, the movable shaft rod 36 and the limit clamping plate 361 are rotated through the control knob 362 to make the limit clamping plate 361 correspond to the through slot 43, and then the control knob 362 is pushed upward to make the limit clamping plate 361 completely pass through the through slot 43 and come between the upper and lower layers of I-beams 41. Then the limit clamping plate 361 is rotated 90 degrees, and the control knob 362 is moved downward, so that the through holes at both ends of the control knob 362 can be respectively sleeved outside the two limit convex blocks 44, thereby further positioning the steel purlin. And the limit clamping plate 361 always fits on the upper surface of the lower-layer I-beam 41 under the action of gravity. Therefore, the limit clamping plate 361 and the limit convex blocks 44 will not easily separate from each other.

[0030] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirits of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A deep and large foundation pit multi-layer steel enclosing purlin assembly adjusting structure, characterized in that: The utility model relates to a kind of steel plate pile support structure, including: T-shaped frame (2), the T-shaped frame (2) is set two as a group, the rib plate of the T-shaped frame (2) is equipped with multiple suspension holes (21) that are linearly distributed in equal intervals; Two T-shaped frames (2) of a group are provided with steel corbel, the steel corbel includes two support plates (3), two support plates (3) are kept horizontal sliding connection by guide shaft (33) between, the corner of support plate (3) is fixed with boss (31), and boss (31) side is fixed with suspension shaft (311), the lower surface of support plate (3) is provided with support screw (32) rotationally connected with it, and the lower end of support screw (32) is provided with support shaft (323), suspension shaft (311) and support shaft (323) are respectively inserted in two suspension holes (21), the T-shaped frame (2), support plate (3) and support screw (32) form right triangle three; The upper surface of the support plate (3) is placed with steel enclosing purlin.

2. The multi-layer steel enclosing purlin assembly adjusting structure of a deep and large foundation pit according to claim 1, characterized in that: The steel enclosing purlin includes two enclosing purlin side plates (4), two enclosing purlin side plates (4) are fixed with I-beam (41) between, the I-beam (41) is provided with upper and lower two layers, the upper edge of one enclosing purlin side plate (4) is equipped with suspension hole (42), the steel enclosing purlin and T-shaped frame (2) are provided with basket screw (5) between, the both ends of basket screw (5) are provided with S-shaped hook (51), and two S-shaped hooks (51) are respectively hung in suspension hole (21) and suspension hole (42).

3. The multi-layer steel enclosing purlin assembly adjusting structure of a deep and large foundation pit according to claim 2, characterized in that: The spacing between two adjacent support plates (3) is greater than the total length of two suspension shafts (311), and the ends of the suspension shaft (311) and the support shaft (323) are fastened to the rib plate of the T-shaped frame (2) by nuts.

4. The multi-layer steel enclosing purlin assembly adjusting structure of a deep and large foundation pit according to claim 3, characterized in that: The T-shaped frame (2) is installed on the steel sheet pile (1), the steel sheet pile (1) is provided with multiple, two adjacent steel sheet piles (1) are reversely arranged, and the two adjacent steel sheet piles (1) are locked and connected by the lock at the edge of the steel sheet pile (1), two T-shaped frames (2) of a group are respectively welded and fixed to the inner side wall of two steel sheet piles (1), and two T-shaped frames (2) of a group are located on the same side of the enclosure stake formed by multiple steel sheet piles (1).

5. The multi-layer steel enclosing purlin assembly adjusting structure of a deep and large foundation pit according to claim 4, characterized in that: The guide shaft (33) is provided with two, and the two guide shafts (33) are parallel to each other, the outer sides of the both ends of the guide shaft (33) are movably sleeved with guide shaft sleeve (34), and the two guide shaft sleeves (34) at the both ends of the guide shaft (33) are respectively fixed to the lower surfaces of the two support plates (3).

6. The multi-layer steel enclosing purlin assembly adjusting structure of a deep and large foundation pit according to claim 5, characterized in that: The outer sides of the both ends of the support screw (32) are respectively sleeved with adjusting sleeve (321) by thread, the end, away from the support screw (32), of the adjusting sleeve (321) is fixed with rotating seat (322), the rotating seat (322) at the upper end of the support screw (32) is rotatably installed on the lower surface of the support plate (3), and the support shaft (323) is fixedly installed on the side of the support shaft (323) at the lower end of the support screw (32).

7. The multi-layer steel enclosing purlin assembly adjusting structure of a deep and large foundation pit according to claim 6, characterized in that: The upper surface of the support plate (3) is fixed with a limiting convex plate (35), the limiting convex plate (35) is located between the two surrounding purlin side plates (4), the limiting convex plate (35) and the I-shaped steel (41) located between the two surrounding purlin side plates (4) are both provided with a through slot (43), the middle part of the support plate (3) is movably provided with a vertical movable shaft (36), the upper end of the movable shaft (36) extends between the upper and lower I-shaped steels (41), and the upper end of the movable shaft (36) is fixed with a limiting clamping plate (361).

8. The deep and large foundation multi-layer steel enclosing purlin assembly adjusting structure according to claim 7, characterized in that: The limiting convex plate (35) is in the shape of an open-down " " in section, the two side corners of the limiting convex plate (35) are both provided with chamfers, the inner side wall of the middle part of the limiting convex plate (35) is fixed with a reinforcing rib plate, the reinforcing rib plate is along the length direction of the steel surrounding purlin, and the lower edge of the reinforcing rib plate is welded and fixed with the upper surface of the support plate (3).

9. The multi-layer steel enclosing purlin assembly adjusting structure of a deep and large foundation pit according to claim 8, characterized in that: The limiting clamping plate (361) and the movable shaft (36) form a "T" shape, both ends of the limiting clamping plate (361) are provided with through holes, the through holes movably insert a limiting convex block (44), and the limiting convex block (44) is fixed on the lower I-shaped steel (41).

10. The multi-layer steel enclosing purlin assembly adjusting structure of a deep and large foundation pit according to claim 9, characterized in that: The lower end of the movable shaft (36) is fixed with a control knob (362), after the movable shaft (36) is rotated by 90 degrees, the limiting clamping plate (361) passes through the inner cavity of the through slot (43) from top to bottom and is accommodated between the limiting convex plate (35) and the support plate (3).

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