Matching manufacturing and high-precision installation construction method of steel cage for ground-connected wall

Abstract

The present invention relates to the field of building construction technology, and specifically refers to a method for matching, manufacturing and high-precision installation of steel cages for ground-connected walls. Proceed in the following steps: S1. Based on the offset of the first-phase trough box-type joints along the X and Y directions, design the structural dimensions of the second-phase trough steel cage; S2. Make the steel cage according to the designed structural dimensions of the steel cage, analyze the manufactured steel cage, and verify the reliability of the steel cage matching design and the feasibility of lowering the construction; S3. Hoist and lower the steel bars that meet the requirements for reliability and feasibility, and control and adjust the linear shape of the steel cage during the hoisting and lowering process until the steel cage is completely lowered into the second-phase trough. The ground-connected wall steel cage construction of the present application has the advantage of high precision, achieving the effect of "measurable, visible, and controllable". The entire process is highly intelligent and has great promotion value.

Description

Technical Field

[0001] The present invention relates to the technical field of building construction, and in particular to a matching manufacturing and high-precision installation construction method for a steel cage for a ground-connected wall. 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 projects. The requirements for the bearing capacity of 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 rigid joint using multiple rows of inserted steel bars has emerged and has been used in projects such as the South Channel Bridge of the Zhangjinggao Yangtze River Bridge. The structure of the steel cage is as follows: Figure 1 As shown, it includes a main cage 1 and steel mesh 2. The main cage 1 is a columnar steel frame formed by binding steel bars. The steel mesh 2 is a sheet-like structure with one end plugged into both sides of the main cage 1 along the trough direction. The other end of the steel mesh 2 will be inserted into the adjacent box joint 3. Finally, concrete is poured to connect it to the adjacent box joint 3. Generally, there are multiple rows of steel mesh 2 on both sides of the main cage 1, such as Figure 1 As shown, each side of the main cage 1 has two rows of steel mesh sheets 2. These sheets are the same length vertically as the main cage 1 (in the Z direction, i.e., the height direction). Their ends in the X direction (the X direction refers to the direction in which the trough extends) are inserted into the main cage 1 and the adjacent box-type joint 3. These mesh sheets extend into the rows of rebar in the adjacent box-type joint 3, overlapping them. Adjacent mesh sheets 2 on the same side of the main cage are spaced apart along the Y direction (the Y direction refers to the direction perpendicular to the trough extension). In order to ensure that the stress of the overlapping part meets the requirements, the overlapping length of the steel mesh and the inserted steel bars (that is, the overlapping length of the steel mesh and the inserted steel bars in the X direction) and the overlapping spacing of the steel mesh and the inserted steel bars (that is, the spacing between the steel mesh and the inserted steel bars along the Y direction) need to be guaranteed during construction. The steel cage is a flexible structure relative to the box-type joint steel box, and the lowering construction of the steel cage is carried out after the lowering construction of the box-type joints on both sides is completed. In other words, the space left in the slot when the steel cage is lowered is extremely limited, the risk of the cage being stuck when lowering is very high, and the installation accuracy control is difficult. The steel cage needs to be matched and manufactured to meet the joint quality control indicators.

[0003] The manufacturing process for matching steel cages involves numerous interrelated steps, resulting in complex control indicators and significant control challenges. To achieve these control objectives, the second-phase steel cages must be intelligently designed and matched to the lowering posture of the first-phase steel boxes. This matching must be achieved using rapid matching manufacturing equipment, and linear control must be implemented during the lowering process. Currently, there is no mature method for matching steel cages and for their high-precision installation that allows for "measurable, visual, and controllable" installation throughout the entire process. Therefore, a method for matching steel cages for underground diaphragm walls and for their high-precision installation is urgently needed. Summary of the Invention

[0004] The purpose of the present invention is to solve the shortcomings of the above-mentioned background technology and provide a matching manufacturing and high-precision installation construction method for steel cages for ground-connected walls.

[0005] The technical solution of the present invention is: a method for matching and manufacturing a steel cage for a ground-connected wall and for high-precision installation and construction, which is carried out according to the following steps:

[0006] S1. Based on the offset of the first-phase trough box joint along the X and Y directions, design the structural dimensions of the second-phase trough reinforcement cage;

[0007] S2. Fabricate the steel cage according to its designed structural dimensions and analyze the completed cage to verify the reliability of the cage's matching design and the feasibility of its lowering and construction.

[0008] S3. The steel bars that meet the requirements of reliability and feasibility are hoisted and lowered. During the hoisting and lowering process, the linear shape of the steel cage is controlled and adjusted until the steel cage is completely lowered into the second phase slot.

[0009] According to a method for matching manufacturing and high-precision installation construction of a steel cage for a ground-anchored wall provided in the present application, in step S1, based on the offset of the first-phase trough box-type joint along the X and Y directions, the method for designing the structural dimensions of the second-phase trough steel cage includes: determining the offset distance of the steel mesh along the Y direction based on the offset of the first-phase trough box-type joint along the Y direction; and determining the extended length of the steel mesh along the X direction based on the offset of the first-phase trough along the X direction.

[0010] According to a matching manufacturing and high-precision installation construction method for a ground-anchored wall provided in the present application, the method for determining the deviation distance of the steel mesh along the Y direction based on the offset of the first-phase trough box-type joint along the Y direction includes: the Y-direction offset direction of the steel mesh and the adjacent box-type joint on the same side is the same, and the offset distance of the steel mesh along the Y direction is calculated based on the verticality of the box-type joint, the processing error of the box-type joint and the steel cage, the lowering error of the steel box, and the lowering method of the steel cage; the lowering method of the steel cage is divided into lowering the bottom of the steel cage along the second-phase trough wall and lowering the steel cage along the verticality of 1 / 1000.

[0011] According to a matching manufacturing and high-precision installation construction method for a steel cage for a ground-anchored wall provided in the present application, the method for determining the extension length of the steel mesh along the X direction based on the offset of the first-phase trough along the X direction includes: the extension direction of the steel mesh along the X direction is the same as the X-direction offset direction of the adjacent box-type joint on the same side, and the extension length of the steel mesh along the X direction is calculated based on the offset distance of the box-type joint along the X direction, the processing error of the box-type joint and the steel cage, the lowering error of the steel box, and the lowering method of the steel cage; the lowering method of the steel cage is divided into lowering the bottom of the steel cage along the wall of the second-phase trough and lowering the steel cage along the verticality of 1 / 1000.

[0012] According to a method for matching, manufacturing and high-precision installation of a steel cage for a ground-anchored wall provided in the present application, in step S2, the method for verifying the reliability of the steel cage matching design and the feasibility of the lowering construction includes: obtaining the contour data of the manufactured steel cage, generating a three-dimensional model of the steel cage based on the contour data, obtaining a three-dimensional model of the lowered first-phase trough-box joint and a three-dimensional model of the excavated second-phase trough-slot hole, and performing virtual lowering simulation and collision detection of the steel cage in a simulation system based on the steel cage three-dimensional model, the box-type joint three-dimensional model and the slot hole three-dimensional model. If the steel cage can be lowered in the simulation system without collision, it proves that the reliability of the steel cage matching design and the feasibility of the lowering construction meet the design requirements.

[0013] According to a method for matching, manufacturing and high-precision installation of a steel cage for a ground-anchored wall provided in the present application, in step S2, a main cage of the steel cage and two rows of steel meshes on both sides of the main cage are manufactured according to the design structural dimensions of the steel cage. The main cage and the steel meshes are not welded together first. After the reliability of the steel cage matching design and the feasibility of the lowering construction are verified, the steel meshes are welded to the main cage using a fine-tuning tool to complete the manufacture of the steel cage.

[0014] According to a method for matching and manufacturing a steel cage for a ground-connected wall and for high-precision installation and construction, the method for welding a steel mesh to a main cage using a fine-tuning tool comprises: the fine-tuning tool comprises a guide rail, a chassis bracket slidably connected to the guide rail, a lower bracket located on one side of the chassis bracket in the Y direction, a plurality of movable vertical rods arranged on the chassis bracket at intervals along the X direction, and an upper bracket located on the movable vertical rod; the lower end of the movable vertical rod is hingedly connected to the chassis bracket so as to be rotatable about an X-axis, and one side of the movable vertical rod is connected to the chassis bracket through an upper pull rod; the upper bracket is hingedly connected to the movable vertical rod so as to be rotatable about an X-axis, the upper bracket is connected to the movable vertical rod through an upper support, and the upper bracket is suspended above the lower bracket;

[0015] Obtain the spacing and overlap length of the two layers of steel mesh of the steel cage, tie the lower layer of steel mesh on the flat main cage of the steel cage based on the lower bracket, adjust the movable vertical pole and the upper bracket so that the spacing between the upper bracket and the lower bracket meets the spacing requirements of the two layers of steel mesh, tie the upper layer of steel bars on the main cage based on the upper bracket, and complete the steel mesh tying process.

[0016] According to a method for matching manufacturing and high-precision installation of a steel cage for a ground-anchored wall provided in the present application, in step S3, the method for controlling and adjusting the linear shape of the steel cage during the hoisting and lowering process includes: after the steel cage is manufactured, a plurality of monitoring sections are arranged on the steel cage according to the distribution of the lifting points of the steel cage before hoisting; when the steel cage is in a straight state on the ground, the initial coordinates of each monitoring section are measured using a total station; the double cranes cooperate to lift the steel cage from a straight state to a vertical state; during the lifting process, the total station measures the coordinates of the monitoring section at a set angle, obtains the hoisting deformation according to the measured coordinates and the initial coordinates, and compares the hoisting deformation with the set deformation; if the hoisting deformation is ≤ the set deformation, it proves that the processing quality and reinforcement measures of the steel cage are reliable; if the hoisting deformation is > the set deformation, the steel cage needs to be reinforced.

[0017] According to a method for matching manufacturing and high-precision installation and construction of a steel cage for a ground-anchored wall provided in the present application, in step S3, the method for controlling and adjusting the linear shape of the steel cage during the hoisting and lowering process includes: before the steel cage is lowered, the main cage contour line and the steel mesh contour line are depicted on the guide wall of the second-phase trough according to the structural dimensions of the steel cage, the steel cage is hoisted into the second-phase trough according to the contour line, the steel cage is slowly lowered and the verticality and inclination of the steel cage are monitored in real time, the lap length and lap spacing between the steel mesh and the box-type joint row steel bars during the lowering process are analyzed according to the verticality and inclination of the lowered steel cage, the horizontal deviation and the lowering verticality value required for the lowering of the steel cage are calculated, the main hoisting parameters are adjusted according to the obtained horizontal deviation and lowering verticality values, and the lowering linear shape of the steel cage is controlled.

[0018] According to a matching manufacturing and high-precision installation construction method for a steel cage for a ground-anchored wall provided in the present application, after the steel cage is lowered into place, the inclinometer on the steel cage is used to obtain the three-dimensional posture of the steel cage after installation is completed; an inclinometer tube is reserved on the steel cage, and after the second-phase trench concrete is poured, the inclinometer is lowered into the inclinometer tube, and the horizontal X and Y deviations of the steel cage at different depths are measured by the inclinometer. Based on the three-dimensional posture when the installation is completed and the deviation after the concrete pouring is completed, it is verified whether the spacing and lap length between the steel mesh and the box-type joint row steel bars meet the design requirements, and the underwater posture of the steel cage is measured and verified.

[0019] The advantages of this application are as follows: 1. During the ground-connected wall construction process, this application conducts precise control and adjustment of all processes from the design and manufacture to the lowering of the steel cage, fully considering the conditions of the already completed first-phase trough, ensuring that the construction of the second-phase trough steel cage can be well connected with the box-type joints in the first-phase trough. The entire construction process fully achieves the effect of "measurable, visible, and controllable", which has great promotion value for the construction of large-scale composite ground-connected wall structures;

[0020] 2. The design of the steel cage in this application is based on the offset of the first-stage troughs on both sides. The offset of the first-stage troughs is used as a reference to ensure that the steel cage can be lowered intactly. At the same time, the overlap length and overlap spacing between the steel mesh of the steel cage and the inserted steel bars of the box-type joints can be guaranteed, so that the steel cage and the box-type joints on both sides can be connected intactly, which not only improves the overall construction quality but also reduces the difficulty of construction.

[0021] 3. This application determines the offset direction of the steel mesh of the steel cage according to the offset of the first-phase trough in the Y direction, and then determines the offset distance of the steel mesh in combination with the verticality of the box joint, the processing error of the box joint and the steel cage, the lowering error of the steel box, and the lowering method of the steel cage to ensure that the steel mesh can be well overlapped with the inserted steel bars of the box joint;

[0022] 4. This application determines the extension direction of the steel mesh of the steel cage based on the offset of the first-phase trough in the X direction. Then, the extension length of the steel mesh in the X direction is determined by combining the offset distance of the box joint in the X direction, the processing error of the box joint and the steel cage, the lowering error of the steel box, and the lowering method of the steel cage to ensure that the overlap length of the steel mesh and the inserted steel bars in the X direction meets the design requirements.

[0023] 5. This application obtains a 3D model of the steel cage, a 3D model of the first-phase trough-box joint, and a 3D model of the excavated second-phase trough hole. By performing virtual lowering simulation and collision detection of the steel cage in simulation software, it ensures that the reliability of the steel cage matching design and the feasibility of the lowering construction meet the design requirements, verifies the feasibility of the steel cage lowering in advance, and greatly reduces the risk of cage jamming;

[0024] 6. The production of the steel cage in this application is divided into two parts: first, the main cage is produced, then the steel cage is verified and analyzed, and after the specific parameters of the steel mesh are determined, the steel mesh welding process is carried out. This construction method can ensure the processing accuracy of the steel mesh to the greatest extent, making the subsequent lowering and connection with the first-phase trough box joint smoother;

[0025] 7. This application has specially designed a set of fine-tuning tooling for the installation of steel mesh. The fine-tuning tooling can accurately install the steel mesh on the main cage. The entire construction process is simple and the construction accuracy is extremely high;

[0026] 8. The steel cage structure of this application is very large. In order to avoid the problem of the steel cage being stuck when it is subsequently lowered into the slot due to deformation during the hoisting process, this application monitors the deformation of the steel cage in real time during the lowering process to ensure that the deformation of the steel cage finally entering the slot is within the designed range, thereby improving the accuracy of the steel cage lowering;

[0027] 9. This application monitors the verticality and inclination of the steel cage in real time after it enters the slot, and accurately controls and adjusts the lowering of the steel cage to ensure that the final lowering of the steel cage fully meets the design requirements and that the lap length and lap spacing between the steel mesh and the inserted steel bars meet the design requirements;

[0028] 10. After the steel cage is lowered into place, the present application monitors the steel cage after concrete pouring through the pre-buried inclinometer tube, compares and analyzes the actual construction situation with the situation when the steel cage is lowered, and measures and verifies the underwater posture of the steel cage, which can not only obtain the actual installation situation of the steel cage, but also provide a theoretical basis for the subsequent steel cage installation.

[0029] The ground-connected wall reinforcement cage construction of this application has the advantage of high precision, achieving the effect of "measurable, visible, and controllable". The entire process is highly intelligent and has great promotion value. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 : Schematic diagram of the steel cage structure of this application;

[0031] Figure 2 : Schematic diagram of the overlap between the steel cage and the box-type joints on both sides of the application;

[0032] Figure 3 : Schematic diagram of calculation of clearance data of the second phase trough reinforcement cage of this application;

[0033] Figure 4 : Schematic diagram of measurement point arrangement when the steel cage of this application is at 0°;

[0034] Figure 5 : Schematic diagram of measurement point arrangement when the reinforcement cage of this application is at 30°;

[0035] Figure 6 : Schematic diagram of measurement point arrangement when the steel cage of this application is at 60°;

[0036] Figure 7 : Schematic diagram of measurement point arrangement when the steel cage of this application is at 90°;

[0037] Figure 8 : Flowchart of the fine-tuning tooling used in this application;

[0038] Figure 9: Flowchart of the design, manufacturing and construction of the reinforcement cage of this application;

[0039] Among them: 1—main cage; 2—steel mesh; 3—box-type joint. 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 method for matching and manufacturing steel cages for ground-connected walls and for high-precision installation, 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, a box-type joint is constructed in the first phase trench, and 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 joint facing the steel cage is a row of inserted steel bars, such as Figure 1 As shown, the steel cage includes a main cage 1 and steel meshes 2 located on both sides of the main cage 1 in the X direction. Two steel meshes 2 are provided on each side of the steel cage. The two steel meshes 2 are arranged at intervals along the Y direction. When the steel cage is lowered into the second-phase slot, the steel meshes 2 and the inserted steel bars of the box-type joint 3 on the same side overlap in the Y direction, as shown in FIG. Figure 2As shown, the connection between the steel cage and the box joint is actually achieved by overlapping the steel bars and the steel mesh. During the design, manufacturing and lowering of the steel cage, the overlap length of the steel mesh 2 and the steel bars on the same side (X direction, such as Figure 2 L2 in the ) and overlap spacing (Y direction, such as Figure 2 L1 in the figure), only when the lap length and lap spacing are within the set range can the connection stability between the steel cage and the box-type joint be guaranteed. According to normal understanding, the smaller the lap spacing and the longer the lap length, the greater the connection strength between the steel cage and the box-type joint. However, considering the lowering of the steel cage, if the designed lap spacing is too small and the lap length is too long during the lowering process of the steel cage, the risk of the steel cage getting stuck will increase significantly, affecting the lowering construction of the steel cage. Therefore, the lap length and lap spacing need to be within an appropriate range. This application controls the construction of the steel cage through three aspects, and adjusts and controls the steel cage during the design stage, manufacturing stage, and lowering stage to ensure that the steel cage can be lowered smoothly, and that the lap length and lap spacing meet the design requirements.

[0045] Specifically, such as Figure 9 As shown, follow these steps:

[0046] S1. Based on the offset of the first-phase trough box joint along the X and Y directions, design the structural dimensions of the second-phase trough reinforcement cage;

[0047] The steel cage is a structure that connects the box-type joints in the first-stage troughs on both sides. Therefore, when designing the steel cage, it is necessary to consider the offset of the first-stage troughs on both sides. The offset of the first-stage troughs determines the structure of the steel mesh of the steel cage.

[0048] S2. Fabricate the steel cage according to its designed structural dimensions and analyze the completed cage to verify the reliability of the cage's matching design and the feasibility of its lowering and construction.

[0049] After the steel cage is manufactured according to the designed structural dimensions, verification and analysis are required to ensure that the final cage can be lowered into the second-phase slot intact, and that the steel mesh of the final cage can be properly connected with the adjacent box-type joints. This early verification and analysis can effectively reduce the risk of subsequent cage jams and improve construction efficiency and safety.

[0050] S3. Hoist and lower the steel bars that meet the requirements for reliability and feasibility. During the hoisting and lowering process, control and adjust the linear shape of the steel cage until the steel cage is completely lowered into the second-phase slot;

[0051] Verify and analyze that the steel cage that meets the design requirements is lowered from the manufacturing station into the second-phase slot. Because the steel cage is a complex and large steel skeleton structure, it is necessary to monitor and measure the steel cage in real time during the hoisting process, so as to adjust and control the steel cage in real time to ensure that the steel cage can be lowered into the second-phase slot intact and ensure that the entire lowering process meets the design requirements.

[0052] This application carried out meticulous control operations during the design, manufacturing and lowering construction stages of the steel cage. The entire construction process was extremely accurate, effectively reducing the risk of large steel cages getting stuck during lowering, ensuring that the lap length and lap spacing between the steel cage mesh and the row of steel bars met the design requirements, and improving the quality and efficiency of ground-connected wall construction.

[0053] In some embodiments of the present application, this embodiment optimizes the above-mentioned step S1. This embodiment designs the structural dimensions of the second-phase trough steel cage based on the offset of the first-phase trough box-type joints along the X and Y directions, including: determining the lowering clearance data of the steel cage based on the verticality of the box-type joints on both sides of the first-phase trough; determining the offset distance of the steel mesh along the Y direction based on the offset of the first-phase trough box-type joints along the Y direction; and determining the extension length of the steel mesh along the X direction based on the offset of the first-phase trough along the X direction.

[0054] Install an inclination sensor on the top of the first-phase box joint and use it to measure the verticality of the box joint facing the second-phase slot. Figure 3 As shown in the figure, the verticality of the first phase tank box joint facing the second phase tank side (measured by Figure 3 The verticality of the box joints on both sides facing the second phase trough can be obtained by using the coordinates of the three points A0, A1 and A2 and B0, B1 and B2) and the X-direction spacing between the two groups of box joints in the first phase trough to calculate the clearance data for the lowering of the steel cage of the first phase trough (such as Figure 3 Based on this clearance data, the specifications of the main cage of the steel cage can be obtained.

[0055] Specifically, since the first-phase box joint is divided into multiple segments for hoisting and lowering, an inclination sensor is installed at the predetermined position of the top of each segment. After the first-phase box joint is lowered, the pre-arranged inclination sensor is used to measure the verticality of both sides of the first-phase box joint. After the first-phase box joint is cast, the Beidou measuring point is used to measure the vertex coordinates (X1, Y1, Z1) of the first-phase box joint inclinometer. The inclination angle data of the first-phase box joint to the second-phase steel cage is obtained according to the inclinometer. The specific inclination value of each segment of the box joint is obtained through the inclination sensor data (α xi , α yi , unit: °) to obtain the average angle value in the two directions, and calculate the deflection angle of the box-type joint to the second-phase slot reinforcement cage according to the following formula:

[0056] α x =(α x1 +α x2 +α x3 +…α xn ) / (n+1)

[0057] α y =(α y1 +α y2 +α y3 +…α yn ) / (n+1)

[0058] Where: α x ——The deflection angle of the box-type joint on one side of the second-phase trough towards the steel cage;

[0059] α y ——The inclination angle of the box-type joint on the other side of the second-phase trough towards the steel cage;

[0060] α x1 ——The inclination value monitored by the inclination sensor at the top of the first section of the box-type joint on one side of the second-phase tank;

[0061] α y1 ——The inclination value monitored by the inclination sensor at the top of the first section of the box-type joint on the other side of the second-phase tank;

[0062] α x2 ——The inclination value monitored by the inclination sensor at the top of the second section of the box-type joint on one side of the second-phase tank;

[0063] α y2 ——The inclination value monitored by the inclination sensor at the top of the second section of the box-type joint on the other side of the second-phase tank;

[0064] α x3 ——The inclination value monitored by the inclination sensor at the top of the third section of the box-type joint on one side of the second-phase tank;

[0065] α y3 ——The inclination value monitored by the inclination sensor at the top of the third section of the box-type joint on the other side of the second-phase tank;

[0066] α xn ——The inclination value monitored by the inclination sensor at the top of the nth segment of the box-type joint on one side of the second-phase tank;

[0067] α yn ——The inclination value monitored by the inclination sensor at the top of the nth segment of the box-type joint on the other side of the second-phase tank;

[0068] n——number of sections of box-type joint.

[0069] The inclination value obtained by the inclinometer installed on the upper part of each section of the box joint is converted to the offset value d of the box joint on one side to the second phase steel cage.x , the calculation formula of the box joint offset value is as follows:

[0070] d x =L x *tanα x

[0071] Where: d x ——Offset value of the box-type joint on one side of the second-phase trough at the depth Lx towards the steel cage of the second-phase trough;

[0072] L x ——depth value;

[0073] α x ——The inclination angle of the box-type joint on one side of the second phase trough towards the steel cage.

[0074] Similarly, calculate the offset value d of the box joint on the other side of the second phase trough to the second phase trough reinforcement cage in the same way. y Then, according to the X value of the measuring point coordinates of the box joints on both sides of the second phase tank at the depth of Lx facing the second phase tank and the box joints on one side of the second phase tank at L x The offset value d at the depth to the second phase slot reinforcement cage x , the box-type joint on the other side of the second phase tank is at L x The offset value d at the depth to the second phase slot reinforcement cage y Calculated in L x The clearance at the depth is used to obtain the clearance value of the entire second-phase slot. The minimum clearance is taken to determine whether there is a risk of cage jamming when the second-phase steel cage is lowered. If the minimum clearance is less than the width of the second-phase steel cage, the main cage of the second-phase steel cage needs to be matched and manufactured.

[0075] In a further embodiment of the present application, this embodiment optimizes the above-mentioned method of determining the deviation distance of the steel mesh along the Y direction based on the offset of the first-stage trough box-type joint along the Y direction. The Y-direction offset direction of the steel mesh is the same as that of the box-type joint adjacent to the same side, that is, if the box-type joint on the same side is offset outward in the Y direction, then the steel mesh on the same side needs to take into account this Y-direction outward offset and also offset outward in the Y direction; if the box-type joint on the same side is offset inward in the Y direction, then the steel mesh also needs to be offset inward in the Y direction. The lowering method of the steel cage is divided into two types: the bottom of the steel cage is lowered along the second-stage trough wall (that is, the bottom of the steel cage is completely close to the second-stage trough wall for lowering along the trough) and the steel cage is lowered along the verticality of 1 / 1000 (that is, the verticality of the steel cage is controlled to be within 1 / 1000 for lowering).

[0076] The offset distance of the steel mesh along the Y direction is calculated based on the verticality of the box joint, the processing error of the box joint and the steel cage, the lowering error of the steel box, and the lowering method of the steel cage. The specific calculation formula is as follows:

[0077] Ly 偏移=D 深度 (V 1y +V 11y ) + W 1y +W 2y

[0078] Among them: Ly 偏移 ——The steel cage mesh is at depth D 深度 The position part is offset along the Y direction;

[0079] D 深度 ——The depth of the steel cage mesh;

[0080] V 1y ——Vertical deviation of box-type joint along Y direction;

[0081] V 11y ——Y-direction verticality deviation of the steel mesh under different lowering modes: the value is 0 in the lowering mode along the second-phase trough wall along the bottom of the steel cage, and 1 / 1000 in the lowering mode along the verticality of the steel cage;

[0082] W 1y ——The Y-axis processing error of the steel mesh is positive in the same direction as the downward offset direction and negative in the opposite direction;

[0083] W 2y ——Y-axis machining error of steel box processing, along the downward offset direction, positive value is taken in the same direction, and negative value is taken in the opposite direction;

[0084] The Y-direction offset distance and offset direction of the steel mesh of the steel cage can be calculated according to the above formula.

[0085] In a further embodiment of the present application, the present embodiment optimizes the above-mentioned method of determining the extension length of the steel mesh in the X direction based on the offset of the first-stage trough in the X direction. The extension direction of the steel mesh in the X direction is the same as the X-direction offset direction of the adjacent box-type joint on the same side. If the box-type joint is offset outward in the X direction, the steel mesh needs to be extended outward in the X direction to ensure the overlap length. If the box-type joint is offset inward in the X direction, the steel mesh needs to be contracted inward in the X direction to ensure smooth lowering and overlap length.

[0086] The extension length of the steel mesh along the X direction is calculated based on the offset distance of the box joint along the X direction, the processing error of the box joint and the steel cage, the lowering error of the steel box, and the lowering method of the steel cage; the lowering method of the steel cage is divided into lowering the steel cage bottom along the second-phase groove wall and lowering the steel cage along the verticality of 1 / 1000.

[0087] The specific calculation formula is as follows:

[0088] Lx 伸展 =D 深度(V 1x +V 11x ) + W 1x +W 2x

[0089] Where: Lx 伸展 ——The steel cage mesh is at depth D 深度 The position part extends along the X direction;

[0090] D 深度 ——The depth of the steel cage mesh;

[0091] V 1x ——Vertical deviation of box-type joint along X direction;

[0092] V 11x ——The X-direction verticality deviation of the steel mesh under different lowering modes is 0 in the lowering mode along the groove wall of the second phase groove along the bottom of the steel cage, and 1 / 1000 in the lowering mode along the verticality of the steel cage;

[0093] W 1x ——The X-axis processing error of the steel mesh is positive in the same direction as the downward offset direction, and negative in the opposite direction;

[0094] W 2x ——The X-axis processing error of steel box processing is positive in the same direction and negative in the opposite direction along the downward offset direction.

[0095] The stretching distance and stretching direction of the steel mesh of the steel cage in the X direction can be calculated according to the above formula.

[0096] After obtaining the clearance data for lowering the steel cage, the offset distance and offset direction of the steel mesh in the Y direction, and the extension distance and extension direction of the steel mesh in the X direction, the steel intelligent drawing recognition software can be used to cut materials according to the drawings and perform digital batching to ensure the quality of semi-finished product processing; secondly, a special high-precision tire frame is designed to control the tire frame accuracy to ensure the installation position accuracy of the main reinforcement, distribution reinforcement, etc.; reinforcement measures such as truss reinforcement and dragon mouth strengthening steel plates are taken to ensure structural stability and lifting safety; the steel cage contour data is collected, the processing accuracy is controlled, and the processing quality is inspected.

[0097] During the processing of the steel cage, the main cage of the steel cage and two rows of steel mesh on both sides of the main cage are first produced according to the design structural dimensions of the steel cage. The main cage and the steel mesh are not welded together first. After the reliability of the steel cage matching design and the feasibility of the lowering construction are verified, the steel mesh is welded to the main cage using fine-tuning tooling to complete the production of the steel cage.

[0098] In a preferred embodiment of the present application, the method for verifying the reliability of the steel cage matching design and the feasibility of the lowering construction in the above-mentioned step S2 is optimized. After the main cage and steel mesh of the steel cage are completed, the outline data of the steel cage can be obtained, and a three-dimensional model of the steel cage can be generated based on the outline data. The three-dimensional model of the lowered first-phase trough box joint and the three-dimensional model of the excavated second-phase trough slot hole are obtained. In the simulation system, virtual lowering simulation and collision detection of the steel cage are performed based on the three-dimensional model of the steel cage, the three-dimensional model of the box joint, and the three-dimensional model of the slot hole. If the steel cage can be lowered in the simulation system without collision, it proves that the reliability of the steel cage matching design and the feasibility of the lowering construction meet the design requirements.

[0099] If the risk of the steel cage getting stuck is found during the virtual lowering simulation and collision detection of the steel cage, it is necessary to use fine-tuning tooling to adjust the steel mesh of the steel cage to ensure that the design reliability of the steel cage matching and the feasibility of the lowering construction meet the design requirements.

[0100] The fine-tuning tooling of the present application includes a guide rail, a chassis bracket slidably connected to the guide rail, a lower bracket located on the Y side of the chassis bracket, a plurality of movable vertical rods arranged on the chassis bracket at intervals along the X direction, and an upper bracket located on the movable vertical rod; the lower end of the movable vertical rod is hingedly connected to the chassis bracket so as to be rotatable around the X axis, and one side of the movable vertical rod is connected to the chassis bracket through an upper pull rod; the upper bracket is hingedly connected to the movable vertical rod so as to be rotatable around the X axis, the upper bracket is connected to the movable vertical rod through an upper support, and the upper bracket is suspended above the lower bracket.

[0101] When using, first obtain the spacing and overlap length of the two layers of steel mesh of the steel cage (these data are obtained by calculation and analysis in the design stage, and then optimized in the process of verification and analysis of the reliability of the steel cage matching design and the feasibility of the lowering construction. In the welding process, the welding construction is carried out according to the optimized parameters). The specific process is as follows Figure 8 As shown, based on the lower bracket, the lower layer of steel mesh is tied on the flat main cage of the steel cage, the movable vertical pole and the upper bracket are adjusted so that the distance between the upper bracket and the lower bracket meets the distance requirements of the two layers of steel mesh, and based on the upper bracket, the upper layer of steel bars is tied on the main cage to complete the steel mesh tying process.

[0102] In some other embodiments of the present application, this embodiment optimizes the method of controlling and adjusting the linear shape of the steel cage during the hoisting and lowering process in the above step S3. Specifically, after the steel cage is manufactured, multiple monitoring sections are arranged on the steel cage according to the distribution of the lifting points of the steel cage before hoisting, such as Figure 4As shown, in this embodiment, monitoring sections are arranged at the end faces of the main and auxiliary lifting points, as well as at the sections at the midpoints of adjacent main and auxiliary lifting points. The monitoring end faces are set up when the steel cage is finished and laid flat on the ground. The initial coordinates of each monitoring section are measured using a total station. The twin cranes work together to lift the steel cage from a flat state to a vertical state. During the lifting process, the total station measures the coordinates of the monitoring sections at a set angle. The lifting deformation is obtained based on the measured coordinates and the initial coordinates. The lifting deformation is compared with the set deformation. If the lifting deformation is ≤ the set deformation, it proves that the steel cage processing quality and reinforcement measures are reliable. If the lifting deformation is greater than the set deformation, the steel cage needs to be reinforced.

[0103] like Figures 4-7 As shown in the figure, when the steel cage is placed flat on the ground, 8 monitoring end faces are arranged in sequence along the length direction of the steel cage according to the arrangement positions of the hanging points. They are numbered in sequence as BX1-1, BX2-1, BX1-2, BX2-2, BX1-3, BX2-3, BX1-4, BX2-4, BX1-5, BX2-5, BX1-6, BX2-6, BX1-7, BX2-7, BX1-8, and BX2-8, among which BX1- 1. BX2-1 belongs to one monitoring section, BX1-2 and BX2-2 belong to one monitoring section, BX1-3 and BX2-3 belong to one monitoring section, BX1-4 and BX2-4 belong to one monitoring section, BX1-5 and BX2-5 belong to one monitoring section, BX1-6 and BX2-6 belong to one monitoring section, BX1-7 and BX2-7 belong to one monitoring section, and BX1-8 and BX2-8 belong to one monitoring section.

[0104] In the process of lifting the steel cage from a horizontal state to a vertical state with the help of the double cranes, the coordinates of each monitoring end face are measured when the angle between the steel cage and the ground is 0° (referring to the angle between the length direction of the steel cage and the ground), 30°, 45° and 60°. After the main and auxiliary lifting hooks lift the steel cage to the above-mentioned angles in turn, the hooks are stopped. After the steel cage is completely stable, the coordinates of each monitoring end face are measured again.

[0105] The specific method for analyzing the lifting deformation data is as follows:

[0106] Select a monitoring point of a monitoring section at the main hanging point and a monitoring point of a monitoring section at the auxiliary hanging point as the reference points. Connect the mean coordinates of the measuring points to obtain the reference marking line. Calculate the theoretical elevation z0' of the measuring point on the reference line by interpolation based on the horizontal spacing of the sections. The difference Δz0 between the measured value z0 and the theoretical value z0' is the initial value of the measuring point in the initial state (not hoisted and lying flat).

[0107] After the main and auxiliary hoists lift the steel cage, the length direction of the steel cage is parallel to the ground, that is, the angle between the steel cage and the ground is 0°. Measure the coordinates of the measuring point at 0°. Assume that the coordinates of the measuring point of a monitoring section are (x i 、y i 、z i ), then calculate the measured value z according to the above method i and the theoretical value z i 'Difference Δz i ;Δz i The initial value Δz0 is the deformation value h of the monitoring section when the lifting angle is 0°. i , h i =Δz i -Δz0;

[0108] When the steel cage is lifted to an angle of about 30°, 45°, etc., calculate the measured value z according to the above method. i and the theoretical value z i 'Difference Δz i According to the mean coordinates of the measuring points in the cross section of the main hanging point, the angle α between the steel cage and the horizontal plane can be calculated. Similarly, the deformation h of the measuring point can be calculated. i , h i =cosαΔz i -Δz0.

[0109] The deformation value of the measuring point obtained can be compared with the set deformation. If the hoisting deformation (i.e. the deformation value of the measuring point) is ≤ the set deformation, it proves that the processing quality of the steel cage and the reinforcement measures are reliable. If the hoisting deformation is greater than the set deformation, the steel cage needs to be reinforced.

[0110] In a preferred embodiment of the present application, this embodiment optimizes the method for controlling and adjusting the linear shape of the steel cage during the hoisting and lowering process in the above-mentioned step S3. Specifically, before the steel cage is lowered, the outline of the main cage and the outline of the steel mesh are engraved on the guide wall of the second-phase slot according to the structural dimensions of the steel cage. After the steel cage is hoisted to the slot, the installation position of the steel cage is aligned, and the steel cage is lowered after the position is accurate; when the steel cage is slowly lowered to the first row of hanging points, a temporary shoulder pole is inserted, and the steel cage is slowly lowered. According to the distance between the shoulder pole and the steel plate of the first row of hanging points, steel plates are appropriately inserted for leveling to ensure that the verticality of the steel cage meets the requirements.

[0111] During the lowering process, the total station is used to monitor verticality, and the inclinometer is used to monitor inclination, so as to realize linear monitoring of the lowering process and monitoring of the verticality of the lowering. After the steel cage is vertical, the total station is used to measure the verticality of the steel cage and the inclinometer data is corrected. The inclinometer measurement accuracy can reach 0.001°, realizing real-time measurement of verticality under complex working conditions of thick mud in the trench.

[0112] The lowering posture data of the rebar cage is obtained through monitoring means and serves as the basis for construction data in the subsequent stages. The data is uploaded to the rebar cage lowering linear monitoring platform to enable real-time viewing of inclination data on the web and mobile terminals, improving the convenience and intelligence level of on-site construction control, and achieving high-precision measurement of verticality during the lowering process, providing data support for high-precision installation.

[0113] Based on the control system of the lowering line monitoring platform, the verticality and inclination of the steel cage during the lowering process are measured, and lowering collision detection is carried out. The overlap length and overlap spacing between the steel mesh and the inserted steel bars during the lowering process are analyzed, and the horizontal deviation of the steel cage and the lowering verticality value are calculated. The lowering line control is achieved by controlling the main crane lifting parameters (boom inclination angle, track distance from the slot).

[0114] Finally, an inclinometer and an inclinometer are used to verify the underwater installation posture of the steel cage. The inclinometer can measure the inclination angles of the steel cage at different positions in real time, and thus obtain the three-dimensional posture of the steel cage after installation.

[0115] An inclinometer tube is reserved on the steel cage. After the second-phase trench concrete pouring is completed, an inclinometer is lowered into the inclinometer tube. The inclinometer is used to measure the horizontal X and Y deviations of the steel cage at different depths. Based on the three-dimensional posture at the time of installation and the deviation after the concrete pouring, it is verified whether the spacing and lap length between the steel mesh and the box-type joint row steel bars meet the design requirements, and the underwater posture of the steel cage is measured and verified.

[0116] 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 method for matching, manufacturing and high-precision installation of steel cages for ground-connected walls, characterized by: Follow these steps: S1. Based on the offset of the first-phase trough box joint along the X and Y directions, design the structural dimensions of the second-phase trough reinforcement cage; S2. Fabricate the steel cage according to its designed structural dimensions and analyze the completed cage to verify the reliability of the cage's matching design and the feasibility of its lowering and construction. S3. Hoist and lower the steel bars that meet the requirements for reliability and feasibility. During the hoisting and lowering process, control and adjust the linear shape of the steel cage until the steel cage is completely lowered into the second-phase slot; In step S1, the method for designing the structural dimensions of the second-phase trough reinforcement cage based on the offset of the first-phase trough box-type joint along the X and Y directions includes: determining the offset distance of the reinforcement mesh along the Y direction based on the offset of the first-phase trough box-type joint along the Y direction; determining the extension length of the reinforcement mesh along the X direction based on the offset of the first-phase trough along the X direction; The method for determining the deflection distance of the steel mesh along the Y direction based on the offset of the first-phase trough box-type joint along the Y direction includes: the Y-direction offset direction of the steel mesh and the box-type joint adjacent to the same side is the same, and the offset distance of the steel mesh along the Y direction is calculated based on the verticality of the box-type joint, the processing error of the box-type joint and the steel cage, the lowering error of the steel box, and the lowering method of the steel cage; the lowering method of the steel cage is divided into lowering the bottom of the steel cage along the wall of the second-phase trough and lowering the steel cage along the verticality of 1 / 1000.

2. The method for matching, manufacturing and high-precision installation of a steel cage for a ground-connected wall according to claim 1, characterized in that: The method for determining the extension length of the steel mesh along the X direction based on the offset of the first-stage trough along the X direction includes: the extension direction of the steel mesh along the X direction is the same as the X-direction offset direction of the adjacent box-type joint on the same side, the extension length of the steel mesh along the X direction is calculated based on the offset distance of the box-type joint along the X direction, the processing error of the box-type joint and the steel cage, the lowering error of the steel box, and the lowering method of the steel cage; the lowering method of the steel cage is divided into lowering the bottom of the steel cage along the wall of the second-stage trough and lowering the steel cage along the verticality of 1 / 1000.

3. The method for matching, manufacturing and high-precision installation of a steel cage for a ground-connected wall according to claim 1, characterized in that: In step S2, the method for verifying the reliability of the steel cage matching design and the feasibility of the lowering construction includes: obtaining the contour data of the manufactured steel cage, generating a three-dimensional model of the steel cage according to the contour data, obtaining a three-dimensional model of the lowered first-phase trough box-type joint and a three-dimensional model of the excavated second-phase trough slot hole, and performing virtual lowering simulation and collision detection of the steel cage in a simulation system based on the steel cage three-dimensional model, the box-type joint three-dimensional model and the slot hole three-dimensional model. If the steel cage can be lowered in the simulation system without collision, it is proved that the reliability of the steel cage matching design and the feasibility of the lowering construction meet the design requirements.

4. A method for matching, manufacturing and high-precision installation of a steel cage for a ground-connected wall according to claim 3, characterized in that: In step S2, the main cage of the steel cage and two rows of steel meshes on both sides of the main cage are manufactured according to the design structural dimensions of the steel cage. The main cage and the steel meshes are not welded together first. After the reliability of the steel cage matching design and the feasibility of the lowering construction are verified, the steel meshes are welded to the main cage using a fine-tuning tool to complete the manufacture of the steel cage.

5. The method for matching, manufacturing and high-precision installation of a steel cage for a ground-connected wall according to claim 1, characterized in that: In the step S3, the method for controlling and adjusting the linear shape of the steel cage during the hoisting and lowering process includes: after the steel cage is completed, a plurality of monitoring sections are arranged on the steel cage according to the distribution of the lifting points of the steel cage before hoisting, and when the steel cage is in a straight state on the ground, the initial coordinates of each monitoring section are measured using a total station; the double cranes cooperate to lift the steel cage from a straight state to a vertical state, and during the lifting process, the total station measures the coordinates of the monitoring section at a set angle, obtains the hoisting deformation according to the measured coordinates and the initial coordinates, and compares the hoisting deformation with the set deformation. If the hoisting deformation is ≤ the set deformation, it proves that the processing quality and reinforcement measures of the steel cage are reliable. If the hoisting deformation is > the set deformation, the steel cage needs to be reinforced.

6. A method for matching, manufacturing and high-precision installation of a steel cage for a ground-connected wall according to claim 1 or 5, characterized in that: In the step S3, the method for controlling and adjusting the linear shape of the steel cage during the hoisting and lowering process includes: before the steel cage is lowered, the main cage contour line and the steel mesh contour line are depicted on the guide wall of the second-phase trough according to the structural dimensions of the steel cage, the steel cage is hoisted into the slot mouth of the second-phase trough according to the contour line, the steel cage is slowly lowered and the verticality and inclination of the steel cage are monitored in real time, the lap length and lap spacing between the steel mesh and the box-type joint row steel bars during the lowering process are analyzed according to the verticality and inclination of the lowering of the steel cage, the horizontal deviation and the lowering verticality value required for the lowering of the steel cage are calculated, the main hoisting parameters are adjusted according to the obtained horizontal deviation and lowering verticality values, and the lowering linear shape of the steel cage is controlled.

7. A method for matching, manufacturing and high-precision installation of a steel cage for a ground-connected wall according to claim 1 or 5, characterized in that: After the steel cage is lowered into place, the inclinometer on the steel cage is used to obtain the three-dimensional posture of the steel cage after installation. An inclinometer tube is reserved on the steel cage. After the second phase trench concrete is poured, the inclinometer is lowered into the inclinometer tube. The inclinometer is used to measure the horizontal X and Y deviations of the steel cage at different depths. Based on the three-dimensional posture at installation completion and the deviation after concrete pouring, it is verified whether the spacing and lap length between the steel mesh and the box-type joint row steel bars meet the design requirements, and the underwater posture of the steel cage is measured and verified.

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