Underground composite structure wall with transverse adjusting joints and construction method thereof
By introducing angle-adjustable socket steel components and fiber cloth sealed joints into the steel caisson components, and combining grouting material to transform the connection form, the closure problem caused by construction errors of the steel caisson components was solved, achieving efficient closure and improved structural performance of the underground composite wall.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- CHONGXIN GEOTECHNICAL TECH (SHANGHAI) CO LTD
- Filing Date
- 2026-01-20
- Publication Date
- 2026-05-12
AI Technical Summary
In existing technologies, the lateral connection of steel caisson components has the problem of failure to close the gap due to the lack of consideration for construction errors during construction. In addition, the traditional locking process lacks horizontal adjustment margin, which makes it impossible for the composite structure wall to form an integral structure.
The system employs angle-adjustable socket steel components and fiber cloth in conjunction with the bottom sealing steel plate. By injecting grout, the hinge-type force-bearing form is transformed into a fixed form. Combined with customized adjustable steel boxes and rotating joints, it ensures error adaptability and connection quality during the closure process.
It improves the tolerance and error adaptability of construction, significantly enhances the overall rigidity of underground composite walls and the reliability of connection nodes, forms a modular and standardized construction system, ensures the smooth closure of composite walls and improves structural performance.
Smart Images
Figure CN122013753A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of underground engineering structure technology, specifically to an underground composite structural wall with a lateral adjustment joint and a construction method, applicable to the lateral connection construction of steel box composite diaphragm walls in underground engineering. Background Technology
[0002] With the development of underground engineering technology, diaphragm walls, primarily constructed of steel, are increasingly being used in engineering projects due to their advantages such as light weight, high rigidity, and controllable quality. CN111827264A discloses a method for constructing diaphragm walls using steel caisson technology. A single diaphragm wall section is composed of multiple steel caisson components arranged and connected, sinking section by section. Adjacent steel caisson components are connected using a locking pipe technique. This lateral connection method clearly fails to account for construction errors that could prevent closure. There is no horizontal adjustment margin when the steel caissons are joined at the closure point. Errors during construction, or even accumulated errors, will prevent the composite structure wall from closing and forming a unified structure.
[0003] This invention optimizes the locking process by using fiber cloth and bottom steel plate to ensure that the cavity of the transverse connection joint remains clean during the sinking of the combined steel box, providing a reliable guarantee for subsequent grouting adhesion. The use of angle-adjustable socket steel components effectively solves the problem of the original locking lack of horizontal adjustment margin. By injecting grout into the transverse connection joint, the original hinge-type force-bearing form is transformed into a fixed connection form, significantly improving the overall rigidity of the underground composite wall. Summary of the Invention
[0004] The purpose of this invention is to provide an underground composite structural wall with a transverse adjustment joint and its construction method, which improves the construction tolerance and error adaptability during the closure construction of the underground composite structural wall.
[0005] An underground composite structural wall with an adjustable joint configuration, the main body of which includes a standard steel box 1, a connecting steel box 2, an adjusting steel box 3, a corner steel box 8, and grouting material 4; The standard steel box 1, connecting steel box 2, adjusting steel box 3, and corner steel box 8 are all steel box bodies formed by assembling and welding steel plates, and the upper and lower ends of the steel box bodies are open. The end face of the corner steel box 8 for connection, the end face of the standard steel box 1 for connection, and the end face of the adjusting steel box 3 for connection with the standard steel box 1 are all provided with joints; the joints are all welded vertically along the outer wall of the steel box. Vertical grooves 5 are provided at two right-angled positions on the opposite side of the end face where the joint of the connecting steel box 2 is located. The vertical grooves 5 are provided with non-through vertical limiting slots 51 on the end face of the connecting steel box 2. Rotary joints are inserted into the slots 51. The adjusting steel box 3 has vertical grooves 5 at four right-angle corners. The vertical grooves 5 have non-through vertical limiting slots 51 on the end face of the adjusting steel box 3. Rotary joints are inserted into the slots 51. According to the wall layout line, corner steel boxes 8 are installed at both ends of any wall of the proposed underground structure wall. Standard steel boxes 1 are arranged facing each other between the corner steel boxes 8. Before the closure, connecting steel boxes 2 are placed. Adjusting steel boxes 3 are customized and placed according to the distance and misalignment of the two connecting steel boxes 2. The rotating joints of the connecting steel boxes 2 and the rotating joints of the adjusting steel boxes 3 are connected.
[0006] A construction method for an underground composite structural wall with an adjustable joint configuration includes the following steps: Step 1: Lay out the wall lines and install corner steel boxes at both ends; Step 2: Divide the wall vertically into several layers. Prepare the standard steel box 1, connecting steel box 2, and adjusting steel box 3 required for the bottom layer. Seal the bottom of the female joint 12, rotating female joint 7, and vertical groove 5 of the steel box with welded steel plates. Prepare the standard steel box 1, connecting steel box 2, and adjusting steel box 3 required for the remaining layers. Step 3: Use lifting equipment to hoist the standard steel box 1, and lay the standard steel box 1 from the two corner steel boxes 8 facing each other to carry out the closure construction. The standard steel box 1 is lowered to the preset position where the top of the steel box is flush with the ground. The standard steel box 1 is then connected by the male connector 11 and the female connector 12. The standard steel box 1 is then spliced left and right in sequence according to the design requirements. Step 4: Use lifting equipment to hoist and connect the steel box 2. At the closing position of the underground composite structure wall formed by the standard steel box 1, connect the standard steel box 1 with the male connector 11 and the female connector 12. Step 5: Customize the adjustment steel box 3 according to the spacing and misalignment of the two connecting steel boxes 2, use lifting equipment to hoist the adjustment steel box 3, and connect the steel box 2 by rotating the male connector 6 and the female connector 7. Step 6: Construct layer by layer or in staggered stages until the design elevation is reached; Step 7: Fill the internal cavities of the female connector 12, the rotating female connector 7, and the vertical groove 5 with grout 4; Step 8: Insert grouting pipe 13 into the cavity formed by connecting standard steel box 1 and connecting steel box 2, and into the cavity formed by connecting steel box 2 and adjusting steel box 3, and fill the cavity by grouting through grouting pipe 13; Step 9: Grout material 4 reaches final set, construction process completed.
[0007] The advantages of this invention are as follows: 1. Improved construction tolerance and error adaptability: By setting adjustable rotating male / female joints and customized adjustment steel boxes, the problem of failure to close the wall due to lack of horizontal adjustment margin in traditional locking technology is effectively solved; it can flexibly adapt to errors generated during construction and even error accumulation, ensuring smooth closure of the composite wall.
[0008] 2. Significantly improves the overall structural integrity and rigidity. By injecting grout into the internal cavities of the transverse connection joints, rotating joints, and vertical grooves, the original hinged force-bearing form between adjacent steel boxes is transformed into a fixed connection form, thereby greatly enhancing the overall rigidity and structural performance of the underground composite wall.
[0009] 3. It ensures the quality and reliability of the connection nodes. During construction, the bottom of the joint cavity is sealed by a combination of fiber cloth and bottom sealing steel plate, which can effectively prevent mud and other debris from entering and ensure that the cavity is clean when the grout is poured in later. This provides a reliable guarantee for the adhesion between the grout and the steel structure, thereby improving the strength and durability of the connection nodes.
[0010] 4. A modular and standardized construction system has been established, classifying wall components into standard steel boxes, connecting steel boxes, adjusting steel boxes, and corner steel boxes. Except for the adjusting steel boxes, all other components can be produced in a standardized manner; only the adjusting steel boxes need to be customized based on the final closure. This system facilitates standardized quality control, cost management, and construction organization. Attached Figure Description
[0011] Figure 1 This is a diagram showing the overall connection relationships of the underground composite structural walls; Figure 2 A schematic diagram showing the effect of adding grout to the underground composite structural wall; Figure 3 This is a schematic diagram of a standard steel box; Figure 4 This is a schematic diagram of the connection of the steel box; Figure 5 A schematic diagram for adjusting the steel box; Figure 6 Detailed drawings of male and female connectors; Figure 7 This is a detailed drawing of the rotating male connector and the rotating female connector.
[0012] Labeling Explanation: 1 Standard steel box, 11 Male connector, 12 Female connector, 13 Grouting pipe, 14 Fiber cloth, 15 Female connector bottom sealing steel plate, 2 Connecting steel box, 3 Adjusting steel box, 4 Grouting material, 5 Vertical groove, 51 Groove hole, 52 Vertical groove bottom sealing steel plate, 6 Rotating male connector, 7 Rotating female connector, 8 Angle steel box. Detailed Implementation
[0013] like Figure 1-7As shown: An underground composite structural wall with an adjustable joint configuration, the main body includes a standard steel box 1, a connecting steel box 2, an adjusting steel box 3, a corner steel box 8, and grouting material 4; The standard steel box 1, connecting steel box 2, adjusting steel box 3, and corner steel box 8 are all steel box bodies formed by assembling and welding steel plates, and the upper and lower ends of the steel box bodies are open. The end face of the corner steel box 8 for connection, the end face of the standard steel box 1 for connection, and the end face of the adjusting steel box 3 for connection with the standard steel box 1 are all provided with joints; the joints are all welded vertically along the outer wall of the steel box. Vertical grooves 5 are provided at two right-angled positions on the opposite side of the end face where the joint of the connecting steel box 2 is located. The vertical grooves 5 are provided with non-through vertical limiting slots 51 on the end face of the connecting steel box 2. Rotary joints are inserted into the slots 51. The adjusting steel box 3 has vertical grooves 5 at four right-angle corners. The vertical grooves 5 have non-through vertical limiting slots 51 on the end face of the adjusting steel box 3. Rotary joints are inserted into the slots 51. According to the wall layout line, corner steel boxes 8 are installed at both ends of any wall of the proposed underground structure wall. Standard steel boxes 1 are arranged facing each other between the corner steel boxes 8. Before the closure, connecting steel boxes 2 are placed. Adjusting steel boxes 3 are customized and placed according to the distance and misalignment of the two connecting steel boxes 2. The rotating joints of the connecting steel boxes 2 and the rotating joints of the adjusting steel boxes 3 are connected.
[0014] The standard steel box 1 has a set of female connectors 12 and male connectors 11 located on the left and right end walls, respectively, and the female connectors 12 and male connectors 11 of the standard steel box 1 are rotationally symmetrical. The corner steel box 8 has two types of joints: female joint 12 and male joint 11. When it is connected to the standard steel box 1, it is a male-female mating connection. The type of rotating joint of the adjusting steel box 3 is a set of rotating male joint 6 and rotating female joint 7 located on the left end wall and the right end wall respectively. The rotating male joint 6 and rotating female joint 7 of the adjusting steel box 3 are rotationally symmetrical. The joint types for connecting steel box 2 are a set of female joints 12 and male joints 11 located on the end wall of standard steel box 1, and a set of rotating male joints 6 and rotating female joints 7 located on the end wall of adjusting steel box 3; the joints connecting the end wall of steel box 2 are connected to the joints of standard steel box 1 in a male-female fit, and the rotating joints connecting the end wall of steel box 2 are connected to the rotating joints of adjusting steel box 3 in a male-female fit.
[0015] In this invention, all components except the adjusting steel box 3 are made into standard components, which improves subsequent efficiency and reduces installation costs.
[0016] Standard steel boxes are the most numerous and are used as the main components of straight sections of the wall. They are rectangular boxes formed by welding steel plates, with openings at both ends. Their innovation lies in the double-sided rotationally symmetrical joint design: on the left end wall of the box, a set of male connectors 11 and female connectors 12 are vertically welded along its length; on the right end wall, a set of female connectors 12 and male connectors 11 are symmetrically welded. This rotationally symmetrical design ensures that when any two adjacent standard steel boxes are spliced, the male connector of one box can always automatically align and insert into the female connector of the other box, ensuring a unique installation direction and making operation simple and quick.
[0017] The connecting steel box 2 serves to connect the standard steel box and the adjusting steel box; the connectors on its connecting end wall are standard male connectors 11 and female connectors 12, used for rigid and precise socket connection with the end standard steel box 1. The connectors on its adjusting end wall are rotating male connectors 6 and rotating female connectors 7, used for connection with the subsequent adjusting steel box 3, and this side has an angle adjustment function.
[0018] like Figure 5 As shown, the adjusting steel box 3 is a customized component for the final closure. Its core feature is that vertical slots 5 are opened at each of the four right-angle corners, through which a set of movable rotating male connectors 6 and rotating female connectors 7 are installed. During construction, the box dimensions of the adjusting steel box 3 are designed and customized in reverse based on the precise distance, height difference, and angle deviation between the two connecting steel boxes 2 measured before closure. The rotating connectors on both sides can rotate within the slots 51 of the vertical slots to adaptively insert into the rotating connectors of the two connecting steel boxes 2, perfectly closing the final closure.
[0019] The female connector 12 includes a connecting section and an open cylindrical steel component. The open cylindrical steel component is connected to the standard steel box 1 and the connecting steel box 2 through the connecting section. The opening of the open cylindrical steel component is sealed with fiber cloth 14. The bottom of the female connector 12 of the bottom steel box is sealed by welding the bottom of the female connector bottom sealing steel plate 15. The fiber cloth 14 is bonded to the outside of the opening of the cylindrical steel component along its length.
[0020] The rotating female connector 7 includes a limiting connecting section and an open cylindrical steel component. The open cylindrical steel component is embedded in the vertical groove 5 through the limiting connecting section. The limiting connecting section is inserted into the vertical groove 5 and a limiting element is provided on the inner side of the limiting connecting section to prevent the rotating female connector 7 from coming out of the vertical groove 5. The opening of the open cylindrical steel component is sealed with fiber cloth 14. The bottom of the rotating female connector 7 of the bottom steel box is sealed by welding the bottom of the female connector sealing steel plate 15. The fiber cloth 14 is bonded to the outside of the opening of the cylindrical steel component along its entire length. The male connector 11 includes a connecting section and an arc-shaped limiting component; the arc-shaped limiting component is connected to the standard steel box 1 and the connecting steel box 2 through the connecting section; The rotating male connector 6 includes a limiting connecting section and an arc-shaped limiting component; the arc-shaped limiting component is embedded in the vertical groove 5 through the limiting connecting section, the limiting connecting section is inserted into the vertical groove 5 and a limiting element is provided on the inner side of the limiting connecting section so that the rotating female connector 7 will not come out of the vertical groove 5.
[0021] In the rotating male connector 6 and rotating female connector 7, because the size of the limiting component is larger than the slot opening, the connector can rotate around the connecting shaft at a certain angle within the slot, but it will not be pulled out. The bottom of the rotating female connector 7 of the lowest adjusting steel box or connecting steel box is also welded with a bottom sealing steel plate 15, which can ensure that when the adjusting steel box or connecting steel box sinks, mud and sand will not enter the rotating female connector 7.
[0022] The curved limiting component of the rotating male connector 6 is mainly a cylindrical steel component with an inner wall contour fit. An important detail is that the lower end of its limiting connection section is machined into a cutting edge, which facilitates cutting the fiber cloth 14 during the sinking process and reduces resistance.
[0023] The vertical groove 5 connecting the steel box 2 and the adjusting steel box 3, wherein the bottom of the vertical groove 5 of the bottom steel box is welded closed by the vertical groove sealing steel plate 52, and the groove 51 provided in the vertical groove 5 is not continuous along the vertical length, and both ends of it retain part of the parent material.
[0024] The bottom steel plate 52 of the vertical channel is welded and sealed to ensure that when the connecting steel box 2 or the adjusting steel box 3 sinks, mud and sand will not enter the vertical channel 5.
[0025] After the standard steel box 1, connecting steel box 2, and adjusting steel box 3 are connected to each other, grouting pipes 13 are inserted in sections into the cavity formed by the connection of the standard steel box 1, connecting steel box 2, and adjusting steel box 3. The grouting pipes 13 are connected by screw joints.
[0026] The grouting material 4 is a high-strength cement-based grouting mixture or ultra-high performance concrete.
[0027] Because this invention uses high-performance concrete as the grouting material, after it is poured into the internal cavity of the female joint 12, the rotating female joint 7, the vertical groove 5, and the cavity between the boxes, it can completely fill all gaps. After hardening, it transforms all independent steel box nodes from a hinged state to a fixed state, greatly improving the overall rigidity and bending resistance of the wall.
[0028] The fiber cloth 14 is a biaxially oriented composite material with high tensile strength and low shear strength.
[0029] A construction method for an underground composite structural wall with an adjustable joint configuration includes the following steps: Step 1: Lay out the wall lines and install corner steel boxes at both ends; Step 2: Divide the wall vertically into several layers. Prepare the standard steel box 1 and connecting steel box 2 required for the bottom layer. Seal the bottom of the female joint 12, rotating female joint 7 and vertical groove 5 of the steel box with welded steel plates. Prepare the standard steel box 1 and connecting steel box 2 required for the remaining layers. Step 3: Use lifting equipment to hoist the standard steel box 1, and lay the standard steel box 1 from both ends of the corner steel box 8 facing each other for closure construction. Connect the standard steel box 1 with the male connector 11 and the female connector 12 through socket joint, and splice the standard steel box 1 left and right in sequence according to the design requirements. Step 4: Use lifting equipment to hoist and connect the steel box 2, and connect it to the standard steel box 1 through male connector 11 and female connector 12; Step 5: Customize the adjustment steel box 3 according to the spacing and misalignment of the two connecting steel boxes 2, use lifting equipment to hoist the adjustment steel box 3, and connect the steel box 2 by rotating the male connector 6 and the female connector 7. Step 6: Construct the steel box layer by layer or in staggered stages until the designed depth is reached; Step 7: Fill the internal cavities of the female connector 12, the rotating female connector 7, and the vertical groove 5 with grout 4; Step 8: Insert grouting pipe 13 into the cavity formed by connecting standard steel box 1 and connecting steel box 2, and into the cavity formed by connecting steel box 2 and adjusting steel box 3, and fill the cavity by grouting through grouting pipe 13; Step 9: Grout material 4 reaches final set, construction process completed.
[0030] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.
Claims
1. A type of underground composite structural wall with a lateral adjusting joint, characterized in that: The main body includes a standard steel box (1), a connecting steel box (2), an adjusting steel box (3), a corner steel box (8), and grouting material (4); The standard steel box (1), connecting steel box (2), adjusting steel box (3) and corner steel box (8) are all steel boxes formed by assembling and welding steel plates, and the upper and lower ends of the steel boxes are open. The corner steel box (8), the standard steel box (1), and the adjusting steel box (3) are all equipped with joints on their connecting end faces; all joints are welded vertically along the outer wall of the steel box. Vertical grooves (5) are provided at two right-angled positions on the opposite side of the end face of the connecting steel box (2). A non-through vertical limiting groove (51) is provided on the end face of the connecting steel box (2). A rotating joint is inserted into the groove (51). The adjusting steel box (3) has vertical grooves (5) at four right angles. The vertical grooves (5) have non-through vertical limiting slots (51) at the end face of the adjusting steel box (3). Rotary joints are inserted into the slots (51). According to the wall layout line, corner steel boxes (8) are installed at both ends of any wall of the proposed underground structure wall. Standard steel boxes (1) are arranged in opposite directions between the corner steel boxes (8). Before the closure, connecting steel boxes (2) are placed. Adjusting steel boxes (3) are customized and placed according to the distance and misalignment of the two connecting steel boxes (2). The rotating joints of the connecting steel boxes (2) and the rotating joints of the adjusting steel boxes (3) are connected.
2. The underground composite structural wall with a transverse adjusting joint according to claim 1, characterized in that: The standard steel box (1) has a set of female connectors (12) and male connectors (11) located on the left end wall and the right end wall respectively. The female connectors (12) and male connectors (11) of the standard steel box (1) are rotationally symmetrical. The corner steel box (8) has a female connector (12) and a male connector (11), which are connected to the standard steel box (1) in a male-female mating connection. The type of rotating joint of the adjusting steel box (3) is a set of rotating male joints (6) and rotating female joints (7) located on the left end wall and the right end wall respectively. The rotating male joints (6) and rotating female joints (7) of the adjusting steel box (3) are rotationally symmetrical. The connection type of the steel box (2) is a set of female connectors (12) and male connectors (11) located on the end wall of the standard steel box (1) and a set of rotating male connectors (6) and rotating female connectors (7) located on the end wall of the adjusting steel box (3); the connectors on the end wall of the steel box (2) are connected to the connectors of the standard steel box (1) in a male-female fit, and the rotating connectors on the end wall of the steel box (2) are connected to the rotating connectors of the adjusting steel box (3) in a male-female fit.
3. The underground composite structural wall with a transverse adjusting joint according to claim 2, characterized in that: The female connector (12) includes a connecting section and an open cylindrical steel component. The open cylindrical steel component is connected to the standard steel box (1) and the connecting steel box (2) through the connecting section. The opening of the open cylindrical steel component is sealed with fiber cloth (14). The bottom of the bottom steel box is sealed by welding the female connector (12) with the female connector bottom sealing steel plate (15). The fiber cloth (14) is bonded to the outside of the opening of the cylindrical steel component along its length. The rotating female connector (7) includes a limiting connection section and an open cylindrical steel component. The open cylindrical steel component is embedded in the vertical groove (5) through the limiting connection section. The limiting connection section is inserted into the vertical groove (5) and a limiting element is provided on the inner side of the limiting connection section so that the rotating female connector (7) will not come out of the vertical groove (5). The opening of the open cylindrical steel component is sealed with fiber cloth (14). The bottom of the rotating female connector (7) of the bottom steel box is sealed by welding the bottom of the female connector sealing steel plate (15). The fiber cloth (14) is bonded to the outside of the opening of the cylindrical steel component along its length. The male connector (11) includes a connecting section and an arc-shaped limiting component; the arc-shaped limiting component is connected to the standard steel box (1) and the connecting steel box (2) through the connecting section. The rotating male connector (6) includes a limiting connecting section and an arc-shaped limiting component; the arc-shaped limiting component is embedded in the vertical groove (5) through the limiting connecting section, the limiting connecting section is inserted into the vertical groove (5) and a limiting element is provided on the inner side of the limiting connecting section so that the rotating male connector (6) will not come out of the vertical groove (5). The lower end of the limiting connection section of the male connector (11), female connector (12), rotating male connector (6), and rotating female connector (7) is a cutting edge.
4. The underground composite structural wall with a transverse adjusting joint according to claim 1, characterized in that: The vertical groove (5) connecting the steel box (2) and adjusting the steel box (3) has the bottom of the vertical groove (5) of the bottom steel box welded closed by the vertical groove sealing steel plate (52), and the groove (51) provided in the vertical groove (5) is not continuous in the vertical direction, and both ends of it retain part of the parent material.
5. The underground composite structural wall with a transverse adjusting joint according to claim 1, characterized in that: After the standard steel box (1), connecting steel box (2), and adjusting steel box (3) are connected to each other, grouting pipes (13) are inserted in sections into the cavity formed by the connection of the standard steel box (1), connecting steel box (2), and adjusting steel box (3). The grouting pipes (13) are connected by screws.
6. The underground composite structural wall with a transverse adjusting joint according to claim 3, characterized in that: The fiber cloth (14) is a biaxially oriented composite material with high tensile strength and low shear strength.
7. The underground composite structural wall with a transverse adjusting joint according to claim 1, characterized in that: The grouting material (4) is a high-strength cement-based grouting mixture or ultra-high performance concrete.
8. A construction method for an underground composite structural wall with a transverse adjusting joint according to any one of claims 1-7, characterized in that, Includes the following steps: Step 1: Lay out the wall lines and install corner steel boxes (8) at both ends; Step 2: The wall is divided into several layers vertically. Prepare the standard steel box (1) and connecting steel box (2) required for the bottom layer. The bottom of the female joint (12), rotating female joint (7) and vertical groove (5) of the steel box are sealed with welded steel plates. Prepare the standard steel box (1) and connecting steel box (2) required for the remaining layers. Step 3: Use lifting equipment to hoist the standard steel box (1), and lay the standard steel box (1) from the two corner steel boxes (8) facing each other to carry out the closure construction. Connect the male connector (11) and the female connector (12) through the socket connection, and splice the standard steel box (1) left and right in sequence according to the design requirements. Step 4: Use lifting equipment to hoist and connect the steel box (2), and connect it to the standard steel box (1) through the male connector (11) and the female connector (12); Step 5: Customize the adjustment steel box (3) according to the spacing and misalignment of the two connecting steel boxes (2), use lifting equipment to hoist the adjustment steel box (3), and connect the steel box (2) by rotating the male connector (6) and rotating the female connector (7). Step 6: Construct the steel box layer by layer or in staggered stages until the designed depth is reached; Step 7: Fill the internal cavities of the female connector (12), rotating female connector (7) and vertical groove (5) with grout (4); Step 8: Insert grouting pipe (13) into the cavity formed by connecting the standard steel box (1) and the connecting steel box (2) and the cavity formed by connecting the connecting steel box (2) and the adjusting steel box (3), and fill the cavity by grouting through the grouting pipe (13); Step 9: Grouting material (4) finally sets, and the construction process is completed.