High-precision installation and construction method of box-type joints for ground-connected walls

Abstract

The present invention relates to the field of building construction technology, and specifically refers to a high-precision installation and construction method for box-type joints for ground-connected walls. Proceed in the following steps: S1, split the box-type joint into multiple segments for processing, and pre-assemble the processed segments; S2, perform virtual collision detection on the pre-assembled box-type joints that meet the design requirements to determine whether the box-type joints can be installed smoothly. If deviations occur, adjust the parts where deviations occur; S3, hoist the first segment to the first-phase trough and lower it, hoist the adjacent secondary segments to the upper end of the first segment, accurately connect the two segments and weld them into one, then lower the welded secondary segments into the trough, and proceed in sequence until all the segments are completely lowered into the first-phase trough to complete the installation and construction of the box-type joint. The installation and construction of the box-type joint of the present application has the advantages of high efficiency and high precision. The entire installation process is always measurable, visual and controllable, and has a high degree of intelligence.

Description

Technical Field

[0001] The invention relates to the technical field of building construction, and in particular to a high-precision installation and construction method of a box-type joint for a ground-to-wall connection. Background Art

[0002] Underground continuous walls are widely used in deep foundation pit retaining structures due to their high rigidity, good impermeability and strong adaptability to the strata. With the development of construction technology, there are more and more cases of them being used as permanent structural engineering. The force requirements for underground continuous wall joints are extremely high, and the joints need to have good bending and shear resistance. Conventional joint forms can no longer meet the needs of the project. In ultra-deep and special-shaped retaining structures, a box-type joint that uses multiple rows of inserted steel bars to overlap each other has emerged. Box-type joints that use multiple rows of inserted steel bars to overlap each other are as follows: Figures 1-2 As shown, the box-type joint includes an outer steel box part and a mesh part inside the steel box part. The steel box part includes an outer flat steel plate. The flat steel plates are welded in sequence to form a hollow box body 1 with openings at both ends. The mesh part inside the box body 1 includes a row of inserted steel bars 2 connected to the steel cage. The row of inserted steel bars 2 is a mesh structure with the same length as the box-type joint in the vertical direction. A plurality of row of inserted steel bars 2 are arranged on the side of the box-type joint, and adjacent row of inserted steel bars 2 on the same side are arranged at intervals from each other.

[0003] The construction method of the continuous wall with box-type joints with multiple rows of inserted steel bars is as follows: first, the first-phase trench is excavated, and then the box-type joint is placed in the first-phase trench. Then, the second-phase trench is excavated based on the box-type joint in the first-phase trench, and the steel cage is placed in the second-phase trench. The steel cage is arranged along the X direction (the X direction refers to the extension direction of the trench body, such as Figure 1 As shown), steel mesh is set on both sides, and the steel mesh will overlap with the inserted steel bars in the box joint. The inserted steel bars and the steel mesh are arranged parallel to each other. The steel mesh extends into the inserted steel bars and is connected to the joint steel mesh along the Y direction (Y direction refers to the direction of extension of the vertical trough body, as shown). Figure 1 Finally, pour concrete to cast the steel mesh and the inserted steel bars into one, completing the construction of the ground-connected wall.

[0004] Due to the large size of box-type joints, to ensure that the joints meet the required force, the socket-type steel mesh overlap length (the length of the overlapping portion of adjacent rows of interlocking steel bars and the steel mesh along the X direction) and the interlocking steel spacing (the spacing of the overlapping portion of adjacent rows of interlocking steel bars and the steel mesh along the Y direction) must be guaranteed during construction. This places extremely high demands on the installation accuracy and plane position accuracy of the box-type joints. Currently, there is no mature high-precision installation construction method for box-type joints that can achieve "measurable, visible, and controllable" installation throughout the entire process. Therefore, a high-precision installation method for box-type joints for underground continuous walls is urgently needed. Summary of the Invention

[0005] The purpose of the present invention is to solve the shortcomings of the above-mentioned background technology and provide a high-precision installation and construction method for a box-type joint for a ground-connected wall.

[0006] The technical solution of the present invention is: a high-precision installation and construction method for a box-type joint for a ground-to-wall connection, which is carried out according to the following steps:

[0007] S1. Split the box-type joint into multiple segments for processing, and pre-assemble the processed segments;

[0008] S2. Perform virtual collision detection on pre-assembled box-type joints that meet design requirements to determine whether the box-type joints can be installed smoothly. If there are deviations, adjust the deviated parts;

[0009] S3. Hoist the first section to the first-stage trough and lower it. Accurately adjust the hoisting posture of the first section until the first section is completely lowered into the trough. Hoist the adjacent secondary sections to the upper end of the first section. After accurately connecting the two sections, weld them together. Then lower the welded secondary sections into the trough. Repeat this process in sequence until all the sections are completely lowered into the first-stage trough to complete the installation of the box joint.

[0010] According to a high-precision installation and construction method for a box-type joint for a ground-connected wall of the present application, in step S1, the method of pre-assembling the processed segments includes: arranging a longitudinal baseline along the height direction on the segment, arranging a transverse baseline along the width direction at the end position of the segment, arranging multiple reference points on the longitudinal baseline and the transverse baseline, accurately measuring and adjusting the segment, and installing temporary connectors at the end position of the segment after the segment passes inspection;

[0011] The segments that have passed the inspection are laid flat for pre-assembly. The verticality of the segments is judged based on the longitudinal baseline to see whether it meets the requirements. The docking accuracy of adjacent segments is judged based on the temporary connectors of adjacent segments to see whether it meets the requirements.

[0012] According to a high-precision installation and construction method for a box-type joint for a ground-connected wall in the present application, the method for judging whether the verticality of a segment meets the requirements based on the longitudinal baseline includes: if the straightness of the longitudinal baseline is ≤ the set verticality, then it is judged that the verticality of the segment meets the design requirements; if the straightness of the longitudinal baseline is > the set verticality, then it is judged that the verticality of the segment does not meet the design requirements.

[0013] According to a high-precision installation and construction method for box-type joints for ground-connected walls applied in the present application, the method for judging whether the docking accuracy of adjacent segments meets the requirements based on temporary connectors of adjacent segments includes: arranging bolts extending in the height direction at the ports on one side where the adjacent segments are connected to each other, and providing corresponding screw holes at the ports on the other side. If, during the pre-assembly process, the bolts can pass through the screw holes smoothly, it proves that the docking accuracy of the adjacent segments meets the design requirements. If the bolts cannot pass through the screw holes smoothly, it proves that the docking accuracy of the adjacent segments does not meet the design requirements.

[0014] According to a high-precision installation and construction method for box-type joints for ground-connected walls in the present application, in step S2, the method for performing virtual collision detection on pre-assembled box-type joints that meet design requirements includes: after the pre-assembly process of the box-type joint segments is completed, the coordinate data of the reference points on the segments are obtained, a virtual digital twin model of the box-type joint is generated according to the coordinate data, and then a first-phase slot hole three-dimensional model is obtained. In the simulation analysis software, the virtual digital twin model of the box-type joint is overlapped with the slot hole three-dimensional model to determine whether a collision will occur during the lowering of the box-type joint.

[0015] According to a high-precision installation and construction method for a box-type joint for a ground-connected wall of the present application, in step S3, the method for accurately adjusting the hoisting posture of the first section includes: drawing the outline of the first section on the guide wall, arranging installation measuring points and marking lines on the first section, and arranging a limit guide structure on the guide wall;

[0016] Based on the contour line on the guide wall, the first section is lowered into the slot. The plane deviation of the first section is limited by the limiting guide structure. The installation measuring points and marking lines on the first section are monitored in real time, and the inclination angle of the first section is adjusted according to the monitoring situation.

[0017] According to the present application, a high-precision installation and construction method for a box-type joint for a ground-connected wall is provided, wherein the method of arranging a position-limiting guide structure on a guide wall includes: arranging lateral baffles and guide rollers on both sides of the guide wall in the X direction and the Y direction of the box-type joint; one end of the lateral baffle is fixed to the guide wall, and the other end extends to the notch in the X direction or the Y direction;

[0018] A guide support is arranged on the guide wall, and a sliding support that can move along the X direction or the Y direction is installed on the guide support. A guide screw rod for driving the sliding support to move along the X direction or the Y direction is arranged between the guide support and the sliding support, and a guide roller is provided on the side of the sliding support facing the slot; the guide roller is connected to the sliding support and can rotate along the axial direction perpendicular to the guide screw rod.

[0019] According to a high-precision installation and construction method of a box-type joint for a ground-connected wall applied in the present application, the method for adjusting the inclination angle of the first section according to the monitoring situation includes: using a total station to measure the measuring points and marking lines of the first section to obtain the verticality of the first section, using an inclinometer on the first section to measure the inclination angles of the first section along the X and Y directions, judging the adjustment direction and angle of the first section according to the verticality and the inclination angle, tying a cable wind rope on the reserved lifting lug of the first section before lowering the first section, and accurately adjusting the first section based on the obtained adjustment direction and angle of the first section by using the cable wind rope.

[0020] According to a high-precision installation and construction method for box-type joints for ground-connected walls in the present application, in step S3, after the first section is lowered into the first-phase trough, the first section is supported and leveled using the adjustment structure installed on the guide wall. After the first section is leveled, the lifting equipment lifts the second section to the top of the first section, measures the verticality and inclination of the second section, and adjusts the second section based on the guy rope on the reserved lifting lug of the second section to ensure that the second section is accurately aligned with the first section, and uses a welding robot to weld the first section and the second section into one.

[0021] According to a high-precision installation and construction method for a box-type joint for a ground-connected wall in the present application, the method of supporting and leveling the first section using an adjustment structure installed on a guide wall includes: arranging at least two groups of three-dimensional jacks on both sides of the box-type joint on the guide wall, welding support brackets on both sides of the first section before lowering the first section; lowering the first section to support the support brackets on the corresponding three-dimensional jacks, using the three-dimensional jacks to apply X-, Y- and Z-direction forces to the first section, and leveling the first section so that the verticality of the first section meets the design requirements.

[0022] The advantages of this application are: 1. This application avoids the difficulty of lowering large box joints by splitting the large-sized box joints into multiple segments for processing, manufacturing and lowering, and improves the construction accuracy of lowering large box joints. In addition, during the manufacturing and lowering process of the box joints, this application monitors and adjusts the box joints in real time, ensuring that the installation and construction process of the box joints can remain "measurable, visible and controllable", thereby improving the construction efficiency and installation accuracy of large box joints and having great promotion value;

[0023] 2. The box-type joint of the present application will be pre-assembled after manufacturing. By pre-assembling adjacent segments, the box-type joint can be docked and verified in advance, avoiding the problem of large alignment errors during the lowering process. Problems that may arise during the alignment process can be handled before lowering, reducing the difficulty of subsequent lowering construction and improving the accuracy of installation construction. In addition, the pre-assembly method of the present application is simple;

[0024] 3. This application arranges a vertical baseline along the height direction on the segment and measures the verticality of the vertical baseline to obtain the verticality of the current segment. By comparing the verticality of the vertical baseline with the set verticality, it is possible to quickly determine whether the current segment meets the design requirements. If it does not meet the design requirements, it can be processed in advance to avoid the problem of being unable to solve the problem during the subsequent deployment process;

[0025] 4. This application determines whether the docking accuracy meets the design requirements by arranging the corresponding structure of bolts and screw holes at the connection positions of adjacent segments. If the bolts and screw holes of adjacent segments can be accurately docked during the pre-assembly process, it can be determined that the docking accuracy meets the requirements. Otherwise, it does not meet the design requirements. This method is extremely simple and easy to operate.

[0026] 5. This application performs virtual collision detection before and during the lowering of the box-type joint. Before lowering, a simulation test is performed on the virtual digital twin model of the box-type joint and the three-dimensional model of the first-phase slot hole to determine whether the box-type joint has the risk of getting stuck. During the lowering process, the inclination angle of the segment can be collected, and a simulation test is performed in conjunction with the virtual digital twin model of the box-type joint and the three-dimensional model of the first-phase slot hole to determine whether the lowering of the box-type joint is smooth. By combining digital simulation technology, it provides great convenience for the high-precision installation of the box-type joint.

[0027] 6. This application provides a variety of operating methods for lowering the box-type joint. By drawing lines on the guide wall, it is convenient for the segment to be accurately aligned when entering the first-stage slot. The limit guide structure on the guide can limit the non-vertical displacement of the segment, ensuring that the segment can be accurately lowered vertically. By real-time monitoring of the segment and making precise adjustments, the segment can be accurately lowered to the designed position. The entire lowering process is extremely accurate.

[0028] 7. The limiting guide structure of the present application is extremely simple. The lateral baffles limit the non-vertical movement of the segments. The guide rollers can move in the X or Y direction and are adjusted to the length of the guide rollers extending into the slots. The rolling friction between the guide rollers and the steel plates of the box-type joints reduces friction while facilitating the lowering of the segments. The entire device has a simple structure and is easy to operate.

[0029] 8. The present application has an extremely simple method for adjusting the inclination of the first section. By measuring the verticality and inclination of the first section in real time, the first section is adjusted using the guy rope reserved on the first section. The adjustment method is simple and the operation is extremely convenient.

[0030] 9. In the process of docking adjacent segments, the application uses the adjustment structure on the guide wall to level the segments inside the slot, and uses the guy rope on the segments outside the slot to adjust the inclination and verticality of the segments outside the slot, ensuring that the two segments to be docked can be docked together accurately. The adjustment method is simple and the construction efficiency is extremely high.

[0031] 10. This application installs a three-dimensional jack on the guide wall, and uses the three-dimensional jack to apply X-, Y- and Z-direction forces to the segments in the slot, thereby leveling the segments in the slot to ensure that the verticality of the segments in the slot meets the design requirements. The entire adjustment method is simple and easy to operate.

[0032] The installation and construction of the box-type joint in this application has the advantages of high efficiency and high precision. The entire installation process is always measurable, visible and controllable. It has a high degree of intelligence, greatly reduces the difficulty of construction, and has great promotion value. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 : Schematic diagram of the I-shaped box-type joint structure of the present application;

[0034] Figure 2 : A three-dimensional schematic diagram of the straight box-type connector of the present application;

[0035] Figure 3 : Schematic diagram of the arrangement of the limiting guide structure of this application;

[0036] Figure 4 : Schematic diagram of the guide support structure of this application;

[0037] Figure 5 : Schematic diagram of the three-dimensional jack adjustment process of this application;

[0038] Figure 6 : Schematic diagram of the installation and construction process of this application;

[0039] Among them: 1—box body; 2—row of inserted steel bars; 3—lateral baffle; 4—guide support; 5—sliding support; 6—guide screw rod; 7—guide roller. DETAILED DESCRIPTION

[0040] The embodiments of the present invention are described in detail below, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, but are not to be construed as limiting the present invention.

[0041] In the description of the present invention, it should be understood that the terms "longitudinal", "transverse", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0042] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0043] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0044] This application relates to a high-precision installation and construction method for box-type joints for ground-connected walls, which is used in the construction of large-scale composite ground-connected walls. During the construction of large-scale composite ground-connected walls, the first phase trench is excavated, and the box-type joint is constructed in the first phase trench. Then the second phase trench is excavated, and the steel cage is lowered in the second phase trench. Both sides of the steel cage in the X direction are box-type joints, and the side of the box-type joint facing the steel cage is the row of inserted steel bars, such as Figures 1-2 The figure shows the box-type joint structure of the present application. The box-type joint is divided into a straight box-type joint and a cross-type box-type structure. Figures 1-2 This is a schematic diagram of a straight-line box joint. The box joint consists of an outer box body 1 and rebar 2 located inside it. The box body 1 is a hollow structure with open ends, formed by welding multiple steel plates together. Multiple rows of rebar 2 are positioned on the sides where the box body 1 meets the rebar cage. Adjacent rows of rebar 2 are spaced apart along the Y direction, and the rebar 2 is arranged equal in length to the box body 1. During construction, the rebar 2 overlaps the cage's steel mesh in the Y direction, and the structure is formed after concrete is poured.

[0045] Specifically, such as Figure 5 As shown, the box-type joint of the present application can be carried out according to the following steps:

[0046] S1. Split the box-type joint into multiple segments for processing, and pre-assemble the processed segments;

[0047] The box-type joint is large in scale. If it is directly hoisted and lowered, the production, manufacturing and installation of the box-type joint will be extremely difficult. Therefore, the box-type joint needs to be split. By splitting the box-type joint into multiple segments along the height direction and then welding and assembling them, the difficulty of production, manufacturing and hoisting can be effectively reduced. This application splits the box-type joint into three segments, namely the first segment, the second segment and the tail segment. In fact, it is not limited to three segments. As long as the installation and construction requirements are met, it is feasible to select other numbers of segments.

[0048] In the actual production process, three segments are manufactured according to the design parameters. The three segments are finally welded together during the construction process. In order to avoid problems that are difficult to solve during the subsequent welding process, this application performs pre-assembly after the segments are manufactured. The pre-assembly process will promptly discover any problems with the segments, and the problems found can be solved in a timely manner to avoid these problems being left unsolved during the installation and construction stage.

[0049] S2. Perform virtual collision detection on the pre-assembled box-type joints that meet the design requirements to determine whether the box-type joints can be installed smoothly. If there are deviations, adjust the deviated parts;

[0050] Pre-assembly deals with the problems of the segment itself, that is, whether the segment manufacturing meets the design parameter requirements. Pre-assembly cannot discover problems in installation and construction. This application performs virtual collision analysis on the manufactured box joint to determine whether the currently manufactured box joint can be lowered smoothly. This operation can determine in advance the problems in the process of lowering the box joint into the slot hole, and such problems can be solved in advance to avoid the situation where subsequent problems cannot be solved and lead to installation and construction failure.

[0051] S3. Hoist the first section to the first-stage trough and lower it. Accurately adjust the hoisting posture of the first section until the first section is completely lowered into the trough. Hoist the adjacent secondary section to the upper end of the first section. After accurately butting the two sections together, weld them together. Then lower the welded secondary section into the trough. Repeat this process in sequence until all sections are completely lowered into the first-stage trough, completing the installation of the box joint.

[0052] This application is carried out in a manner of lowering section by section and then welding each section. After the first section is lowered into place, it is fixed in the slot position, and then the second section is aligned. After the second section is accurately aligned with the first section, the two sections are welded together, and then the two sections are lowered as a whole. The tail section is then lowered and installed according to the above steps, and this is carried out in sequence until all the sections are installed and lowered.

[0053] The box-type joint of the present application is processed, manufactured, installed and constructed in sections. During the entire construction process, the processing accuracy, lowering accuracy and positioning accuracy of the box-type joint are monitored in real time, and the posture of the box-type joint during the installation and construction process is accurately adjusted. The installation and construction of the box-type joint is extremely precise and the degree of intelligence is extremely high. The entire process is "measurable, visible and controllable".

[0054] In some embodiments of the present application, this embodiment optimizes the above-mentioned step S1. Specifically, in the above-mentioned step S1, the method for pre-assembling the processed segments is: arranging a longitudinal baseline along the height direction on the segment. The longitudinal baseline can select the center line of a certain side of the segment. For example, the I-shaped box joint can select the center line of the steel plates on both sides as the longitudinal baseline, and the cross-shaped box joint can select the center line of one side as the longitudinal baseline. Of course, in actual application, it is not limited to the above-mentioned setting method, as long as the straightness of the segment can be easily obtained.

[0055] A horizontal baseline is arranged along the width direction at the end of the segment. The horizontal baseline is set on the outside of the two ends of the segment (the segment ring, that is, the two ends along the height direction), and can be along the width direction or the thickness direction. The vertical baseline and the horizontal baseline are set to facilitate the subsequent measurement of the segment. Multiple reference points are arranged on the vertical baseline and the horizontal baseline. During the pre-assembly process, the reference points need to be measured using a total station. The measurement content includes the segment's linear shape, length, port size, straightness, etc. In fact, it is to inspect and analyze the manufactured segment to determine whether the manufactured segment is qualified. If the result of the inspection and analysis is unqualified, the segment will be adjusted according to the specific situation of the unqualified condition until the inspection is completely qualified (in line with the design size requirements). After the segment is qualified, a temporary connector is installed at the end of the segment;

[0056] The segments that have passed the inspection are laid flat (the segments are manufactured flat) for pre-assembly. The verticality of the segments is judged based on the longitudinal baseline to see whether it meets the requirements. The docking accuracy of adjacent segments is judged based on the temporary connectors of adjacent segments to see whether it meets the requirements.

[0057] In a further embodiment of the present application, this embodiment optimizes the above-mentioned verticality detection method. The specific method for judging whether the verticality of the segment meets the requirements based on the longitudinal baseline is: using a total station to measure the coordinates of the reference point on the longitudinal baseline of the segment, the straightness of the longitudinal baseline can be obtained based on the coordinates of the reference point. This straightness actually represents the verticality of the segment, and then the straightness of the longitudinal baseline is compared with the set verticality. If the straightness of the longitudinal baseline is ≤ the set verticality, it is judged that the verticality of the segment meets the design requirements; if the straightness of the longitudinal baseline is > the set verticality, it is judged that the verticality of the segment does not meet the design requirements.

[0058] The set verticality of this embodiment is obtained according to the design requirements of the box-type joint. The set verticality of this embodiment is 1 / 1000, that is, the straightness of the longitudinal baseline is ≤1 / 1000, and it is judged that the verticality of the segment meets the design requirements; if the straightness of the longitudinal baseline is greater than 1 / 1000, it is judged that the verticality of the segment does not meet the design requirements, and the segment needs to be adjusted to ensure that the final straightness of the longitudinal baseline is ≤1 / 1000.

[0059] In another preferred embodiment of the present application, this embodiment optimizes the above-mentioned docking accuracy detection method. The specific method for judging whether the docking accuracy of adjacent segments meets the requirements based on the temporary connecting parts of adjacent segments is: bolts extending along the height direction (when the segments are in a flat state, it is actually the length direction of the segments) are arranged at the ports on one side where the adjacent segments are connected to each other, and corresponding screw holes are set at the ports on the other side. If the bolts can pass through the screw holes smoothly during the pre-assembly process, it proves that the docking accuracy of the adjacent segments meets the design requirements. If the bolts cannot pass through the screw holes smoothly, it proves that the docking accuracy of the adjacent segments does not meet the design requirements.

[0060] Bolt holes are through-holes with an inner diameter slightly larger than the bolts. Bolts and screw holes are positioned so that adjacent segments correspond to each other. For example, the center of the ends of adjacent segments is a typical location for joints. Bolts and screw holes are temporary structures, used only during pre-assembly. Once the joints meet design accuracy, they can be removed.

[0061] In other embodiments of the present application, this embodiment optimizes the method for performing virtual collision detection on pre-assembled box-type joints that meet design requirements in step S2 above. After the pre-assembly process of the box-type joint segments is completed, the coordinate data of the reference points on the segments are obtained, and a virtual digital twin model of the box-type joint is generated based on the coordinate data. Then, a three-dimensional model of the first-phase slot hole is obtained. In the simulation analysis software, the virtual digital twin model of the box-type joint is overlapped with the three-dimensional slot hole model to determine whether a collision will occur during the lowering of the box-type joint.

[0062] The virtual digital twin model of the box joint is acquired after pre-assembly. Once pre-assembly is complete and the manufacturing meets design requirements, the coordinate data of the reference points on the box joint segments is acquired using a total station. This coordinate data is then transferred to the simulation software to generate the virtual digital twin model of the box joint. The 3D model of the first-phase slot hole is generated after excavation is complete, using equipment such as inclinometers and ultrasonic measuring instruments to acquire data from the first-phase slot.

[0063] By overlaying the virtual digital twin of the box joint with the 3D model of the first-stage slot in the software, it is possible to determine whether there is a collision risk when the box joint is lowered into the first-stage slot—essentially, whether there is a cage jam. If the simulation analysis indicates a collision, adjustments will be made to the box joint's manufacturing deviations and the local protrusions in the first-stage slot to improve installation accuracy.

[0064] The above introduction is about the virtual collision detection before the box joint is lowered. In actual application, virtual collision detection is also required during the construction process of the box joint lowering. During the lowering process of the box joint, the inclination of the box joint is monitored in real time. This can be obtained by the inclinometer installed on the box joint. Then, the virtual digital twin model of the previous box joint and the three-dimensional model of the first-phase slot hole are combined to perform a virtual collision simulation of the lowering process to determine whether a collision will occur during the current lowering process. If a collision problem occurs, the current lowering segment needs to be adjusted. The adjustment at this time is mainly to adjust the verticality and inclination of the segment.

[0065] In some embodiments of the present application, the present embodiment optimizes the method for precisely adjusting the hoisting posture of the first segment in the above step S3. Before hoisting the first segment, the outline of the first segment is drawn on the guide wall, including the outline of the box joint in the X direction and the outline of the Y direction. The outline facilitates the guidance of the hoisting and lowering of the segment. When hoisting the first segment, the first segment is aligned with the outline and lowered into the first-stage slot.

[0066] Before hoisting the first section, it is also necessary to arrange and install measuring points and marking lines on the first section. During the hoisting process of the first section, the measuring points and marking lines on the first section are measured by a total station to determine the deflection of the first section during the lowering and docking process, which facilitates the adjustment of the first section.

[0067] In addition, in this embodiment, before the first segment is lowered, a limiting guide structure is arranged on the guide wall. The limiting guide structure is a structure used to limit and guide the lowering of the segment, so that the segment can only move vertically when lowered, avoiding non-vertical movement of the segment.

[0068] During actual lowering, the first section is lowered into the slot based on the contour line on the guide wall. The plane deviation of the first section is limited by the limiting guide structure. The installation measuring points and marking lines on the first section are monitored in real time, and the inclination angle of the first section is adjusted according to the monitoring situation.

[0069] In a further embodiment of the present application, this embodiment optimizes the above-mentioned method of arranging a limiting guide structure on the guide wall. Specifically, side baffles 3 and guide rollers 7 are arranged on both sides of the guide wall on the X direction and the Y direction of the box-type joint, as shown in FIG. Figure 3 As shown, the side baffles 3 are flat steel plates with one end fixed to the guide wall and the other end extending to the slot in the X or Y direction. During use, two side baffles 3 are placed on the guide wall, one on each side of the box joint in the X and one on each side of the box joint in the Y direction. During the lowering of the segment, the ends of the side baffles 3 extending to the slot abut against the outside of the segment box, forcing the segment to be lowered only vertically.

[0070] In addition, if Figure 4As shown, a guide support 4 is arranged on the guide wall, and a sliding support 5 that can move along the X direction or the Y direction is installed on the guide support 4. A guide screw 6 for driving the sliding support 5 to move along the X direction or the Y direction is arranged between the guide support 4 and the sliding support 5. A guide roller 7 is provided on the side of the sliding support 5 facing the slot, and the guide roller 7 can be connected to the sliding support 5 and rotated along the axial direction perpendicular to the guide screw 6.

[0071] During use, the position of the sliding support 5 is adjusted by the guide screw 6 so that when the segment is lowered, the guide roller 7 can abut against the outside of the segment box, and there is rolling friction between the guide roller 7 and the segment. At the same time, the sliding support 5 where the guide roller 7 is located is fixed to the guide support 4 by the guide screw 6. After the guide screw 6 is adjusted, the guide roller 7 is fixed in the horizontal direction, and the segment can only be lowered along the lowering space formed by the guide roller 7.

[0072] like Figure 3 As shown, for a cross-shaped box joint structure, four sets of guide supports are provided, and the guide rollers 7 are arranged crosswise. That is, one set of guide rollers 7 abuts the X-direction side of the segment, and two adjacent sets of guide rollers 7 abut the Y-direction side of the segment, together forming a space for the segment to be lowered. For a straight box joint structure, two sets of guide supports can be directly arranged on both sides of the straight box joint structure in the Y direction. The guide rollers on both sets of guide supports abut the Y-direction side of the straight box joint.

[0073] In some other embodiments of the present application, this embodiment optimizes the above-mentioned method of adjusting the inclination of the first section according to the monitoring situation. Specifically, a total station is used to measure the measuring points and marking lines on the first section to obtain the verticality of the first section. The inclination of the first section along the X and Y directions is measured using an inclinometer on the first section. The adjustment direction and angle of the first section are determined based on the verticality and the inclination. Before the first section is lowered, a guy rope is tied to the reserved lifting lug of the first section. The first section is precisely adjusted based on the obtained adjustment direction and angle of the first section through the guy rope.

[0074] The total station and inclinometer can monitor the verticality and inclination of the first section in real time during the lowering process. Based on the verticality and inclination, the first section can be well adjusted using the guy rope tied to the reserved lifting lug. During the lowering process, the first section is suspended in the air by the lifting equipment. Generally speaking, the lifting equipment is connected to the upper end of the first section. At this time, the suspended first section can be easily adjusted in posture by the guy rope tied to the reserved lifting lug.

[0075] In some embodiments of the present application, this embodiment optimizes the above step S3. Specifically, the first section is accurately lowered in the above manner. After the first section is lowered to the set position, the set position in this embodiment refers to the position where the first section is lowered to be connected with the second section. Generally, most of the first section enters the slot hole, and the first section is fixed by the adjustment structure on the guide wall. The adjustment structure performs leveling on the first section. After it is completely leveled, the connection between the lifting equipment and the first section is released, and the lifting of the second section begins.

[0076] The hoisting equipment lifts the secondary section to the top of the primary section, measures the verticality and inclination of the secondary section, and adjusts the secondary section based on the guy rope on the reserved lifting lug of the secondary section to ensure that the secondary section is accurately aligned with the primary section. The primary section and the secondary section are welded together using a welding robot. To ensure the quality of the weld in windy and rainy weather and reduce welding deformation, a protective shed can be built at the welding point between the primary and secondary sections as a protective measure. The shed is composed of square steel pipes and iron sheets, and colored strips of cloth are hung on the steel bars outside the box as a rainproof measure, thereby avoiding the formation of a large inclination angle after the upper and lower sections are connected, effectively ensuring the connection precision control.

[0077] In a further embodiment of the present application, this embodiment optimizes the above-mentioned method of supporting and leveling the first section by using an adjustment structure installed on the guide wall. Specifically, at least two groups of three-dimensional jacks are arranged on both sides of the guide wall on the box joint. In this embodiment, four groups of three-dimensional jacks are arranged on the guide wall. The structure of the three-dimensional jacks can refer to the Chinese utility model patent with publication number "CN218231657U" entitled "A three-dimensional jack for jacking and twisting of frame box bridges". The three-dimensional jacks are comprehensively arranged according to the structure of the box joint. For a straight box joint, two groups of three-dimensional jacks can be directly arranged on the guide walls on both sides of the Y direction of the straight box joint. For a cross box joint, four groups of three-dimensional jacks can be arranged on the guide walls on both sides of the X direction and the Y direction of the cross box joint.

[0078] Before the first section is lowered, supporting brackets are welded on both sides of the first section. After the first section is lowered to the designed docking position, the first section is lowered to the supporting brackets and supported on the corresponding three-dimensional jacks. The verticality and inclination of the first section are measured using the total station and inclinometer. According to the measured parameters, the three-dimensional jack is used to apply X-, Y- and Z-direction forces to the first section to level the first section so that the verticality of the first section meets the design requirements.

[0079] The inclination angle measured by the inclinometer is used to calculate the inclination angle and horizontal displacement of the box joint (first section) along the horizontal X and Y directions. Based on the plane position of the three-dimensional jack under the supporting bracket of the first section, the lifting or retraction range values ​​of each three-dimensional jack in the X, Y, and Z directions can be converted, i.e., the attitude adjustment command, to achieve intelligent leveling decision-making. Based on the attitude adjustment command, the three-dimensional jack is commanded to automatically lift or lower. During the process, the cylinder pressure is monitored and fine-tuned, and the attitude of the first section is servo-controlled and adjusted. After each adjustment, the command generation and attitude servo adjustment are repeated until the attitude and installation accuracy of the first section are within the design limits.

[0080] The box-type joint installation construction process of the present application is centrally controlled by a control system. The control system receives data collected by the total station and inclinometer, and after comprehensive processing of the above data, obtains the adjustment value. The construction personnel adjust the segment posture according to the adjustment value. The control system controls the three-dimensional jack and other adjustment equipment according to the adjustment value, so as to achieve the purpose of intelligent adjustment and control. In addition, the control system of the present application also includes a monitoring platform. After the data is uploaded to the monitoring platform, the inclination data can be viewed in real time on the web and mobile terminals, thereby improving the convenience and intelligence level of on-site construction control, realizing high-precision measurement of the verticality of the lowering process, and providing data support for high-precision control.

[0081] During the lowering process, an inclinometer is installed at the top of each box joint segment. When the box joint segment is vertical, a total station is used to calibrate the inclination data to ensure accuracy. The inclinometer has a measurement accuracy of 0.001°, enabling real-time verticality measurement under complex working conditions such as deep slurry in the trench. After each box joint segment is fully lowered into the trench, the verticality is measured using an ultrasonic wall measuring instrument to calibrate the inclinometer data.

[0082] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-precision installation and construction method for a box-type joint for a ground-to-wall connection, characterized by: Follow these steps: S1. Split the box-type joint into multiple segments for processing, and pre-assemble the processed segments; S2. Perform virtual collision detection on the pre-assembled box-type joints that meet the design requirements to determine whether the box-type joints can be installed smoothly. If there are deviations, adjust the deviated parts; S3. Hoist the first section to the first-stage trough and lower it. Accurately adjust the hoisting posture of the first section until the first section is completely lowered into the trough. Hoist the adjacent secondary section to the upper end of the first section. After accurately butting the two sections together, weld them together. Then lower the welded secondary section into the trough. Repeat this process in sequence until all sections are completely lowered into the first-stage trough, completing the installation of the box joint. In step S1, the method for pre-assembling the processed segments includes: arranging a longitudinal baseline along the height direction on the segment, arranging a transverse baseline along the width direction at the end position of the segment, arranging multiple reference points on the longitudinal baseline and the transverse baseline, accurately measuring and adjusting the segment, and installing temporary connectors at the end position of the segment after the segment passes the inspection; The qualified segments are laid flat for pre-assembly. The verticality of the segments is judged based on the longitudinal baseline to see whether it meets the requirements. The docking accuracy of adjacent segments is judged based on the temporary connectors of adjacent segments to see whether it meets the requirements. In step S2, the method for performing virtual collision detection on the pre-assembled box-type joint that meets the design requirements includes: after the pre-assembly process of the box-type joint segment is completed, obtaining the coordinate data of the reference point on the segment, generating a virtual digital twin model of the box-type joint based on the coordinate data, and then obtaining a first-phase slot hole three-dimensional model. In the simulation analysis software, the virtual digital twin model of the box-type joint is overlapped with the slot hole three-dimensional model to determine whether a collision will occur during the lowering process of the box-type joint; In step S3, the method for accurately adjusting the hoisting posture of the first section includes: drawing the outline of the first section on the guide wall, arranging installation measuring points and marking lines on the first section, and arranging a limit guide structure on the guide wall; Based on the contour line on the guide wall, the first section is lowered into the slot. The plane deviation of the first section is limited by the limit guide structure. The installation points and markings on the first section are monitored in real time. The inclination angle of the first section is adjusted according to the monitoring situation. The method for arranging a position-limiting guide structure on a guide wall includes: arranging lateral baffles and guide rollers on both sides of the guide wall in the X direction and the Y direction of the box-type joint; one end of the lateral baffle is fixed to the guide wall, and the other end extends to the slot along the X direction or the Y direction; A guide support is arranged on the guide wall, a sliding support that can move in the X direction or the Y direction is installed on the guide support, a guide screw is arranged between the guide support and the sliding support for driving the sliding support to move in the X direction or the Y direction, and a guide roller is provided on the side of the sliding support facing the notch; the guide roller is connected to the sliding support and can rotate in a direction perpendicular to the axial direction of the guide screw. In step S3, after the first section is lowered into the first-stage trough, the adjustment structure installed on the guide wall is used to support and level the first section. After the first section is leveled, the lifting equipment lifts the second section to the top of the first section, measures the verticality and inclination of the second section, and adjusts the second section based on the guy rope on the reserved lifting lug of the second section to ensure that the second section is accurately aligned with the first section, and uses a welding robot to weld the first section and the second section into one.

2. A high-precision installation and construction method for a box-type ground-wall joint according to claim 1, characterized in that: The method for judging whether the verticality of a segment meets the requirements based on the longitudinal baseline includes: if the straightness of the longitudinal baseline is ≤ the set verticality, then judging that the verticality of the segment meets the design requirements; if the straightness of the longitudinal baseline is greater than the set verticality, then judging that the verticality of the segment does not meet the design requirements.

3. A high-precision installation and construction method for a box-type joint for a ground-connected wall according to claim 1, characterized in that: The method for judging whether the docking accuracy of adjacent segments meets the requirements based on temporary connecting parts of adjacent segments includes: arranging bolts extending in the height direction at the ports on one side where the adjacent segments are connected to each other, and setting corresponding screw holes at the ports on the other side. If the bolts can pass through the screw holes smoothly during the pre-assembly process, it proves that the docking accuracy of the adjacent segments meets the design requirements. If the bolts cannot pass through the screw holes smoothly, it proves that the docking accuracy of the adjacent segments does not meet the design requirements.

4. A high-precision installation and construction method for a box-type ground-wall joint according to claim 1, characterized in that: The method for adjusting the inclination of the first section according to the monitoring situation includes: using a total station to measure the measuring points and marking lines of the first section to obtain the verticality of the first section, using an inclinometer on the first section to measure the inclination of the first section along the X and Y directions, judging the adjustment direction and angle of the first section according to the verticality and the inclination, tying a cable to the reserved lifting lug of the first section before lowering the first section, and accurately adjusting the first section based on the obtained adjustment direction and angle of the first section by using the cable.

5. A high-precision installation and construction method for a box-type joint for a ground-connected wall according to claim 1, characterized in that: The method for supporting and leveling the first section by using the adjustment structure installed on the guide wall includes: arranging at least two groups of three-dimensional jacks on both sides of the box-type joint on the guide wall, welding support brackets on both sides of the first section before lowering the first section; lowering the first section to support the support brackets on the corresponding three-dimensional jacks, using the three-dimensional jacks to apply X-, Y- and Z-direction forces to the first section, and leveling the first section so that the verticality of the first section meets the design requirements.

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