A method and system for measuring and constructing an offset core tube

Abstract

This application relates to the field of core tube construction technology, and provides a method and system for measuring and constructing an offset core tube, including the following steps: determining the original pre-adjusted coordinate values ​​of the offset core tube walls and columns based on a finite element model; setting out layout holes that meet the requirements within the offset core tube during the construction of each floor section; and measuring the offset core tube N... i Laying out the original pre-adjusted coordinate values ​​of the walls and columns of each floor section, at N i After the construction of each floor section is completed, obtain the offset core tube N. i Deformation monitoring data of walls and columns in each floor section; iterative calculation of offset core tube N. i+1 Pre-adjust coordinate values ​​for floor level walls and columns; perform offset core tube N. i+1 Layout of pre-adjusted coordinate values ​​for walls and columns on each floor.

Description

Technical Field

[0001] This invention belongs to the field of core tube construction technology, specifically relating to an offset core tube measurement and construction method and system. Background Technology

[0002] Currently, the structural design of super high-rise buildings typically adopts a design method in which the core tube is built into the center of the structure. This method can easily cause inconvenience in the planning and utilization of office space, and invisibly increase the construction cost. Therefore, more and more super high-rise buildings are beginning to adopt the method of external building core tube and elevator hall, that is, offset core tube super high-rise buildings, in order to provide the largest possible office space and flexibility in space planning.

[0003] However, due to the different axial compression ratios of the core tube walls and frame columns, and the uneven distribution of structural layout, mass, and stiffness in the Y-direction (offset direction) of super high-rise buildings with offset core tubes, vertical structural members will experience concrete compression, creep, and uneven foundation settlement. This leads to differential vertical deformation between the core tube and frame columns, which in turn affects the horizontal deformation of the entire building. Therefore, pre-correction measures should be taken for offset core tubes, and the coordinates of the core tube walls and columns on each floor should be pre-adjusted to offset the compression and horizontal deformation of the core tube and ensure the verticality and elevation of the offset core tube. However, since the compression and horizontal deformation of the offset core tube are constantly changing during the construction process, the Y and Z coordinates of the control points of each floor of the core tube will also move and change with the construction. If the coordinates of the original design control points are continuously transferred and laid out, the measurement and layout errors will accumulate and increase, making it impossible for the verticality and elevation of the entire building to pass the relevant acceptance, and even causing damage to the building's safety and functionality. Therefore, the problem of the accumulation of measurement and layout errors caused by the compression and horizontal deformation of the offset core tube has become the biggest obstacle to accurate measurement and layout in the construction of super high-rise offset core tube structures. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and propose an offset core tube measurement and construction method and system. Through processes such as wall and column coordinate pre-adjustment design, layout hole design, measurement and layout, coordinate verification, and coordinate adjustment calculation, the offset core tube is ensured to be measured and laid out strictly according to the pre-adjusted design coordinates, thereby realizing high-precision pre-correction measurement and layout construction of the offset core tube.

[0005] In a first aspect, the present invention provides a method for measuring and constructing an offset core tube, comprising the following steps: determining the original pre-adjusted coordinate values ​​of the offset core tube walls and columns based on a finite element model; setting out layout holes that meet the requirements within the offset core tube during the construction of each floor section; and performing offset core tube N... i Laying out the original pre-adjusted coordinate values ​​of the walls and columns of each floor section, at N i After the construction of each floor section is completed, obtain the offset core tube N. iDeformation monitoring data of walls and columns in each floor section; iterative calculation of offset core tube N. i+1 Pre-adjust coordinate values ​​for floor level walls and columns; perform offset core tube N. i+1 Layout of pre-adjusted coordinate values ​​for walls and columns on each floor.

[0006] Furthermore, the step of determining the original pre-adjusted coordinate values ​​of the offset core tube wall columns based on the finite element model includes: establishing an offset core tube finite element model based on the concrete shrinkage and creep B3 model, predicting the time-varying deformation of the concrete components, calculating the overall deformation of the frame-core tube structure, and determining the original pre-adjusted coordinate values ​​of the wall columns of each floor of the offset core tube.

[0007] Furthermore, after determining the original pre-adjusted coordinate values ​​of the wall columns of each floor segment of the offset core tube, statistics are performed using an EXCEL spreadsheet.

[0008] Furthermore, the step of setting a wire-laying hole that meets the requirements in the offset core tube includes: setting a wire-laying hole with a rectangular horizontal cross-section in the offset core tube of each floor; the length direction of the wire-laying hole is consistent with the horizontal deformation pre-adjustment direction of the offset core tube wall column; setting a steel plate around the wire-laying hole, and the steel plate is equipped with scale lines set along the length and width directions of the wire-laying hole.

[0009] Furthermore, the length Y of the wire feeding hole b The following formula is used to determine:

[0010] Y b =Y a +Y l

[0011]

[0012] In the formula: Y b - Length of the wire hole; Y a - Given the base length of the wire hole; Y l - Maximum preset Y-coordinate value for the offset core cylinder; Y 墙max - Maximum Y-coordinate value of the offset core tube wall; -Original Y-coordinate values ​​of the offset core tube wall.

[0013] Furthermore, the biased core tube N i The steps for laying out the original pre-adjusted coordinate values ​​of the wall columns of each floor section include: based on the laying-out holes, using a zenith instrument to transfer the plumb line between floors, and using a total station to determine the offset core tube N. i The original pre-adjusted coordinate values ​​of the walls and columns of each floor are used to lay out the horizontal coordinates.

[0014] Furthermore, the aforementioned in N iAfter the construction of each floor section is completed, obtain the offset core tube N. i The steps for monitoring the deformation data of wall columns in section N include: i After the construction of each floor section was completed, the N-axis was re-evaluated using a zenith instrument and a total station. i The vertical and horizontal coordinates of each floor section were checked, and N was redrawn. i Section floor control points coordinates and The coordinates N are calculated using the following formula. i After the completion of the section and floor construction, N i Changes in Y-coordinate and Z-coordinate of control points for each floor segment:

[0015]

[0016]

[0017] In the formula: -Offset core tube N i Change in the Y-coordinate of the control points of each floor segment; -Offset core tube N i Y-coordinate value of the first construction of the control point of each floor section; -Offset core tube N i Section floor control point at N i The Y-coordinate value after the completion of the floor section construction; -Offset core tube N i Change in the Z-coordinate of the control point of each floor segment; -Offset core tube N i Z-coordinate values ​​of the first construction of the control points of each floor section; -Offset core tube N i Layer control point at N i Z-coordinate value after the completion of the section floor construction.

[0018] Furthermore, the iterative calculation of the bias core tube N i+1 The steps for pre-adjusting the coordinate values ​​of the wall columns in a section include: based on N i+1 The original preset coordinate values ​​of the floor section and the calculated N i The changes in the Y and Z coordinates of the control points of each floor section are used to iteratively calculate the offset core tube N using the following formula. i+1 Pre-set coordinate values ​​for wall columns on each floor section:

[0019]

[0020]

[0021] In the formula: -N calculated after iterative calculation of the biased core barrel i+1The Y-coordinate value of the pre-adjusted coordinate values ​​of the wall and column of each floor segment; -Offset core tube N i+1 The Y-coordinate value of the original preset coordinates of the floor segment; -Offset core tube N i Change in the Y-coordinate of the control points of each floor segment; -N calculated after iterative calculation of the biased core barrel i+1 Z-coordinate value of pre-adjusted coordinate values ​​for wall columns in each floor segment; -Offset core tube N i+1 The Z-coordinate value of the original preset coordinate values ​​of the floor segment; -Offset core tube N i Change in the Z-coordinate of the control point of each floor segment.

[0022] Furthermore, the biased core tube N i+1 The steps for setting out the pre-adjusted coordinate values ​​of the walls and columns of each floor include: using a total station to iteratively calculate N using an offset core tube. i+1 Y-coordinate value of pre-adjusted coordinates of wall and column sections and Z coordinate value Conduct the layout.

[0023] Secondly, this invention also proposes an offset core tube measurement and layout system, comprising: a modeling unit for establishing a finite element model of the offset core tube and determining the original pre-adjusted coordinate values ​​of the offset core tube wall columns; a layout hole set inside the offset core tube; and a first layout unit for determining the offset core tube N based on the coordinate values ​​of the offset core tube. i The original pre-adjusted coordinate values ​​of the wall columns of each floor section are used for horizontal coordinate layout; the deformation monitoring data acquisition unit is used for N... i After the construction of each floor section is completed, obtain the offset core tube N. i Deformation monitoring data of wall columns in each floor segment; iterative calculation unit, used to calculate the original pre-adjusted coordinate values ​​of the offset core tube wall columns and the obtained offset core tube N. i Deformation monitoring data of walls and columns in each floor section were used to iteratively calculate the offset core tube N. i+1 Pre-adjusted coordinate values ​​for floor level walls and columns; and a second layout unit, used to calculate the offset core tube N based on iterative calculations. i+1 Pre-adjusted coordinate values ​​of floor wall columns for offset core tube N i+1 Layout of pre-adjusted coordinate values ​​for walls and columns on each floor.

[0024] The beneficial effects of this invention include: obtaining the original pre-adjusted coordinate values ​​of the offset core tube wall columns based on a finite element model; setting out layout holes within the offset core tube; and calculating N caused by continuous compression and horizontal deformation of the offset core tube through measurement and layout of each floor segment and process verification. i The changes in the Y and Z coordinates of the control points of each floor segment are calculated, and based on these changes, the offset core tube N is iteratively calculated.i+1 The coordinate values ​​of the walls and columns of each floor are pre-adjusted to offset the core tube N. i+1 By pre-setting the coordinate values ​​of the walls and columns of each floor, the construction measurement and layout of the offset core tube structure of the super high-rise building were accurately completed. This ensured that the verticality and elevation of the offset core tube met the design requirements and solved the problem of the superposition of measurement and layout errors caused by the compression and horizontal deformation of the offset core tube. Attached Figure Description

[0025] Figure 1 This is a schematic flowchart of the offset core tube measurement and construction method of the present invention.

[0026] Figure 2 This is a top view of the wire-laying holes distributed within the offset core tube in the method of the present invention.

[0027] Figure 3 This is a top view of the wire feeding hole of the present invention.

[0028] Figure 4 The biased core tube N of this invention i+1 Schematic diagram of actual layout coordinate calculation for each floor section.

[0029] Figure 5 This is a schematic diagram showing the selection of reference points for the overall deformation of the core tube structure, which is the calculation framework of the model of this invention.

[0030] Figure 6 for Figure 5 Horizontal deformation curves of some reference points in the middle at different periods.

[0031] Figure 7 A schematic diagram of the pre-correction theory for the offset core tube.

[0032] Figure 8 This is a schematic diagram of the construction steps for an offset core tube.

[0033] In the diagram, 10 is the wire hole; 20 is the offset core tube. Detailed Implementation

[0034] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0035] like Figure 1 The offset core tube measurement and construction method shown includes the following steps:

[0036] S1. Based on the finite element model, determine the original pre-adjusted coordinate values ​​of the offset core tube wall column.

[0037] S2. When constructing each floor section, set up the required wiring holes in the offset core tube.

[0038] S3, Perform core barrel offset N iLaying out the original pre-adjusted coordinate values ​​of the walls and columns of each floor section, at N i After the construction of each floor section is completed, obtain the offset core tube N. i Deformation monitoring data of walls and columns in each floor section; iterative calculation of offset core tube N. i+1 Pre-adjust coordinate values ​​for floor level walls and columns; perform offset core tube N. i+1 Layout of pre-adjusted coordinate values ​​for walls and columns on each floor.

[0039] S4. Return to step S3 and iteratively calculate the pre-adjusted coordinate values ​​for the next floor segment; based on these pre-adjusted coordinate values, lay out the pre-adjusted coordinate values ​​of the walls and columns for the next floor segment; continue until all floor segments have been laid out. For example, in N... i+1 After the construction of each floor section is completed, obtain the offset core tube N. i+1 Deformation monitoring data of walls and columns in each floor section; iterative calculation of offset core tube N. i+2 Pre-adjust coordinate values ​​for floor level walls and columns; perform offset core tube N. i+2 Layout of pre-adjusted coordinate values ​​for walls and columns on each floor.

[0040] After each floor segment is completed, deformation monitoring data for that segment is acquired, and the pre-adjusted coordinate values ​​for the next floor segment are iteratively calculated. Based on these pre-adjusted coordinate values, the pre-adjusted coordinate values ​​for the walls and columns of the next floor segment are laid out, until all floor segments are laid out. Here, "next floor segment" refers to the next segment in the construction sequence, not the vertical position of the floor structure. For example, N... i+1 The floor number is N i The next floor after the first floor, N floors will be constructed first. i Section of floors, further construction located at N i N above the floor i+1 Floor segment. Where i is greater than or equal to 1.

[0041] The present invention specifically includes the following steps:

[0042] Based on the concrete shrinkage and creep B3 model, an offset core tube finite element model was established to predict the time-varying deformation of concrete components, calculate the overall deformation of the frame-core tube structure, determine the original pre-adjusted coordinate values ​​of the walls and columns of each floor of the offset core tube, and perform statistical analysis using an EXCEL spreadsheet.

[0043] During the construction of each floor section, a rectangular horizontal cross-section layout hole is set in the offset core tube of each floor section; the length direction of the layout hole is consistent with the horizontal deformation pre-adjustment direction of the offset core tube wall column.

[0044] A steel plate is installed around the wire hole, and the steel plate is equipped with scale lines that are set along the length and width of the wire hole.

[0045] Length Y of the wire hole b The following formula is used to determine:

[0046] Y b =Y a +Y l

[0047]

[0048] In the formula: Y b - Length of the wire hole; Y a - Given the base length of the wire hole; Y l - Maximum preset Y-coordinate value for the offset core cylinder; Y 墙max - Maximum Y-coordinate value of the offset core tube wall; -Original Y-coordinate values ​​of the offset core tube wall.

[0049] Based on the stringing holes, a zenith instrument is used to transfer the plumb line between floors. A total station is used based on the offset core tube N. i The original pre-adjusted coordinate values ​​of the walls and columns of each floor are used to lay out the horizontal coordinates.

[0050] In N i After the construction of each floor section was completed, the N-axis was re-evaluated using a zenith instrument and a total station. i The vertical and horizontal coordinates of each floor section were checked, and N was redrawn. i Section floor control points coordinates and The coordinates N are calculated using the following formula. i After the completion of the section and floor construction, N i Changes in Y-coordinate and Z-coordinate of control points for each floor segment:

[0051]

[0052]

[0053] In the formula: -Offset core tube N i Change in the Y-coordinate of the control points of each floor segment; -Offset core tube N i Y-coordinate value of the first construction of the control point of each floor section; -Offset core tube N i Section floor control point at N i The Y-coordinate value after the completion of the floor section construction; -Offset core tube N i Change in the Z-coordinate of the control point of each floor segment; -Offset core tube N i Z-coordinate values ​​of the first construction of the control points of each floor section; -Offset core tube N i Layer control point at Ni Z-coordinate value after the completion of the section floor construction.

[0054] According to N i+1 The original preset coordinate values ​​of the floor section and the calculated N i The changes in the Y and Z coordinates of the control points of each floor section are used to iteratively calculate the offset core tube N using the following formula. i+1 Pre-set coordinate values ​​for wall columns on each floor section:

[0055]

[0056]

[0057] In the formula: -N calculated after iterative calculation of the biased core barrel i+1 The Y-coordinate value of the pre-adjusted coordinate values ​​of the wall and column of each floor segment; -Offset core tube N i+1 The Y-coordinate value of the original preset coordinates of the floor segment; -Offset core tube N i Change in the Y-coordinate of the control points of each floor segment; -N calculated after iterative calculation of the biased core barrel i+1 Z-coordinate value of pre-adjusted coordinate values ​​for wall columns in each floor segment; -Offset core tube N i+1 The Z-coordinate value of the original preset coordinate values ​​of the floor segment; -Offset core tube N i Change in the Z-coordinate of the control point of each floor segment.

[0058] To better understand the concept of this invention, the basic principles and basis of this invention are explained as follows:

[0059] 1. Model Establishment

[0060] (1) For the long-term deformation of the frame-(eccentric) core tube structure during and after construction, the time-varying characteristics of concrete material are considered using the concrete shrinkage and creep B3 model. The B3 model divides concrete deformation into three parts: elastic deformation, creep deformation, and shrinkage deformation. The elastic modulus and load are the determining factors of elastic deformation. The B3 model specifies the formula for calculating the elastic modulus E(t) as follows:

[0061]

[0062] Where t is the calculated age and E(28) is the 28-day elastic modulus of concrete.

[0063] The creep deformation of the B3 model is represented by the combination coefficient J(t,t'), and the formula for calculating J(t,t') is:

[0064] J(t,t')=q1+C0(t,t')+C d (t,t',t0)

[0065] Where q1 is the instantaneous strain under unit stress, C0(t,t') is the basic creep, and C d (t,t',t0) represents the additional creep, t' represents the loading age, and t0 represents the age at which the concrete begins to dry.

[0066] Shrinkage and creep ε in the B3 model sh The formula for calculating (t, t0) is:

[0067] ε sh (t,t0)=-ε sh∞ k h S(t)

[0068] Where, ε sh∞ It is the ultimate contraction strain, k h This is the humidity influence coefficient. S(t) is a time-varying parameter related to the elastic modulus of concrete.

[0069] (2) CFST column treatment

[0070] In concrete-filled steel tube columns, the creep and shrinkage deformation of the concrete are affected by the enclosed environment inside the steel tube and the constraint effect of the steel tube. The finite element software ETABS is used to analyze the structure. In the software, the simulation of the concrete-filled steel tube column adopts a steel-concrete hybrid section to account for the stress redistribution of the steel tube and concrete sections.

[0071] Furthermore, due to the circumferential effect caused by the steel pipe, the revised creep coefficient introduced from the "Design Specification for Steel-Concrete Composite Arch Bridges of Highway (JTGT-D65-06-2015)" is:

[0072]

[0073] Where φ(t,t0) is the initial creep coefficient, a s E represents the steel content of the cross section. s E c ρ represents the elastic modulus of steel pipe and concrete materials, and is a parameter taken according to the specifications.

[0074] 2. Horizontal deformation of components at different times

[0075] Figure 5 This diagram illustrates the selection of reference points for calculating the overall deformation of the frame-core tube structure in the model of this invention. It shows the locations and corresponding labels of the frame columns and shear walls selected for deformation analysis, and analyzes the horizontal deformation of the frame columns and shear walls at different times. Figure 6The deformation of some frame columns and shear walls is shown. The deformation of the frame columns varies to some extent; CC1 and MC1 are selected for comparison. The deformation of the shear walls is basically the same; CW3 is taken as representative. Figure 6 It can be seen that the horizontal deformation of the structure along the height direction exhibits a characteristic of large deformation in the middle and small deformation at both ends (top and bottom). It should be noted that the smaller horizontal displacement at the top is mainly due to construction leveling. For frame columns, the maximum horizontal displacement is unevenly distributed in height. For example, the maximum horizontal displacement of frame column CC1 (105.96 mm) occurs at the 40th floor, while the maximum horizontal displacement of MC1 (119.86 mm) occurs at the 45th floor. For the core tube wall, the maximum horizontal displacement of CW3 occurs at the 43rd floor. In addition, due to the influence of the load on the location of the frame columns, the deformation curves of each frame column fluctuate to some extent, while the deformation curve along the height of the core tube wall, which has a more uniform load condition, is smoother.

[0076] 3. Horizontal Arching Theory

[0077] The principle of the horizontal pre-camber theory is to perform reverse cambering of the core tube during the construction stage of the offset core tube to counteract the horizontal deformation of the offset core tube during construction and ensure the verticality of the offset core tube. See Appendix for details. Figure 7 .

[0078] The specific operation involves reverse-engineering the pre-adjusted coordinate values ​​for each floor based on the finite element model. First, the first floor is constructed according to the construction drawings and coordinate 1. After construction, the first floor deforms. Construction then proceeds to the second floor according to coordinate 2. When both the first and second floors deform, the third floor is constructed according to coordinate 3. This process continues until the roof construction is complete. See the attached diagram for detailed construction instructions. Figure 8 The advantage of this theory is that the given coordinates have taken into account the deformation during the construction of the lower part.

[0079] To better illustrate this patent, the invention is discussed in detail using a super high-rise building in Shanghai with an offset core tube project as an example, to demonstrate its practical significance and value; see appendix for details. Figure 2 .

[0080] Based on the B3 constitutive model of concrete, the finite element model of the project was established using ETABS finite element analysis software. The overall deformation of the frame-core tube high-rise structure was calculated, and the original pre-adjusted coordinate values ​​(X, Y, Z coordinates) of the walls and columns of each floor of the core tube were obtained. The data was then statistically analyzed using an Excel spreadsheet, and a portion of the data is shown below.

[0081]

[0082] Based on the offset core tube layout characteristics of this embodiment, one layout hole is required in each offset core tube, for a total of eight layout holes, to control the positioning of each wall column, beam, and slab within the offset core tube. To achieve mutual verification of the layout holes and meet the requirements for planar visibility, and considering the horizontal deformation characteristics of the offset core tube, to prevent vertical obstruction of visibility due to continuous adjustments in the Y-coordinate value, the horizontal cross-section of the layout holes should be changed from a square to a rectangle, with a width of X... a (Value 200mm), the length is consistent with the horizontal deformation pre-adjustment direction (Y direction), and the length of the wire-laying hole is Y. b Y is the length of the base of the wire laying hole. a (Value taken as 200mm) Maximum preset coordinate value of the offset core tube Y-coordinate l Take the integer part.

[0083] Specifically, the length Y of the wire-laying hole b The following formula is used to determine:

[0084] Y b =Y a +Y l

[0085]

[0086] In the formula: Y b - Length of the wire hole; Y a - Given the base length of the wire-laying hole, which can be the side length of a traditional square wire-laying hole; Y l - Maximum preset Y-coordinate value for the offset core cylinder; Y 墙max - Maximum Y-coordinate value of the offset core tube wall; -Original Y-coordinate values ​​of the offset core tube wall.

[0087] In this embodiment, wall Y l The data is as follows:

[0088] <![CDATA[Y l ]]> 157 157 157 157 157

[0089] Therefore, Y b =Y a +Y l =200mm+157mm=357mm≈400mm.

[0090] Using a total station, the horizontal coordinates of each floor are laid out based on the original pre-adjusted coordinates of the initial section's walls and columns. Taking the N1 section as an example, this is a case study.

[0091] After the construction of section N1 was completed, the vertical and horizontal coordinates of section N1 were rechecked using a zenith instrument and a total station, and the control points of section N1 were redrawn. coordinates and The changes in Y and Z coordinates of this floor segment after the completion of construction of floor segment N1 can be calculated using the following formula:

[0092]

[0093]

[0094]

[0095] Based on the above steps, the changes in control point coordinates were statistically calculated. and The original pre-adjusted coordinate values ​​of floor N2 are used to recalculate the actual layout coordinate values ​​of floor N2 using the following formula.

[0096]

[0097]

[0098] In the above formula: - The Y-coordinate value of the original preset coordinate values ​​of the N2 section of the offset core tube; - Change in Y-coordinate of the control points of the N1 section of the offset core tube; - The Z-coordinate value of the original preset coordinate values ​​of the N2 section of the offset core tube; - Change in Z-coordinate of the control point of the N1 section of the offset core tube.

[0099]

[0100]

[0101] Using the original coordinates of floor N1 as the control coordinates (0, 0, 0) of floor N2, the total station is used to adjust the coordinates based on the control points (0, 0, 0) of floor N1. Lofting.

[0102] According to the calculation results, the adjusted relative coordinate values ​​of the N2 segment floors are as follows: The values ​​are (0, 47 mm, and 45.01 m).

[0103] Repeat the above steps to lay out the remaining floors.

[0104] In N i After the construction of each floor section was completed, the N-axis was re-evaluated using a zenith instrument and a total station. i The vertical and horizontal coordinates of each floor section were checked, and N was redrawn. i Section floor control points coordinates and The coordinates can be calculated using the following formula for the floor segment at N. i Changes in Y and Z coordinates after the completion of each floor section construction (taking F30 as an example).

[0105]

[0106]

[0107]

[0108] According to N i+1 The original preset coordinate values ​​of the floor section and the calculated N i The changes in the Y and Z coordinates of the control points of each floor section are used to iteratively calculate the offset core tube N using the following formula. i+1 Pre-adjusted coordinate values ​​of wall columns in each floor section

[0109]

[0110]

[0111]

[0112] With N i The original coordinates of the floor segment are N. i+1 The control coordinates (0, 0, 0) of the floor section are determined using a total station at N. i Based on the section floor control points (0, 0, 0), the adjusted coordinate values ​​are used. Lofting; according to the calculation results of the above formula, N i+1 The adjusted relative coordinates of the floor section are (0, 49mm, 45.30m).

[0113] Based on the same inventive concept, this invention also proposes an offset core tube measurement and layout system for implementing the methods of the above embodiments, comprising: a modeling unit for establishing a finite element model of the offset core tube and determining the original pre-adjusted coordinate values ​​of the offset core tube walls and columns; a layout hole set inside the offset core tube; and a first layout unit for determining the offset core tube N based on the finite element model of the offset core tube. i The original pre-adjusted coordinate values ​​of the wall columns of each floor section are used for horizontal coordinate layout; the deformation monitoring data acquisition unit is used for N... i After the construction of each floor section is completed, obtain the offset core tube N. i Deformation monitoring data of wall columns in each floor segment; iterative calculation unit, used to calculate the original pre-adjusted coordinate values ​​of the offset core tube wall columns and the obtained offset core tube N. i Deformation monitoring data of walls and columns in each floor section were used to iteratively calculate the offset core tube N. i+1Pre-adjusted coordinate values ​​for floor level walls and columns; and a second layout unit, used to calculate the offset core tube N based on iterative calculations. i+1 Pre-adjusted coordinate values ​​of floor wall columns for offset core tube N i+1 Layout of pre-adjusted coordinate values ​​for walls and columns on each floor.

[0114] This invention addresses the problem of large errors in construction surveying and layout for ultra-high-rise offset core tube structures. It proposes a method to calculate the pre-adjusted coordinate values ​​of the offset core tube walls and columns by establishing a finite element model of the offset core tube; setting rectangular layout holes to meet the pre-adjusted coordinate layout requirements of the offset core tube; and calculating N through measurement and layout of each floor segment and process verification. i The changes in Y and Z coordinates after the completion of each floor section construction are used to iteratively calculate N before construction begins. i+1 Actual floor layout coordinates Ultimately, precise surveying and layout were achieved for the construction of the ultra-high-rise offset core tube structure, ensuring that the verticality and elevation of the offset core tube met the design requirements.

[0115] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A method of biasing a core wall measurement construction, characterized by, Includes the following steps: Based on the finite element model, the original pre-adjusted coordinate values ​​of the offset core tube wall column are determined; During the construction of each floor section, a layout hole is set in the offset core tube to meet the requirements; The step of setting a wire-laying hole that meets the requirements within the biased core barrel includes: A rectangular horizontal cross-section cable-laying hole is installed in the offset core tube of each floor. The length direction of the wire-layout hole is consistent with the horizontal deformation pre-adjustment direction of the offset core tube wall column; A steel plate is provided around the wire-laying hole, and the steel plate is provided with scale lines arranged along the length and width directions of the wire-laying hole; Perform offset core tube Segment floor wall column original pre-adjustment coordinate value lofting, in Segment floor construction is completed, and the offset core tube Segment floor wall column deformation monitoring data; iterative calculation of offset core tube Segment floor wall column pre-adjustment coordinate value; perform offset core tube Segment floor wall column pre-adjustment coordinate value lofting.

2. The method for measuring and constructing an offset core tube according to claim 1, characterized in that, The steps for determining the original pre-adjusted coordinate values ​​of the offset core tube wall column based on the finite element model include: Based on the concrete shrinkage and creep B3 model, an offset core tube finite element model is established to predict the time-varying deformation of concrete components, calculate the overall deformation of the frame-core tube structure, and determine the original pre-adjusted coordinate values ​​of the walls and columns of each floor of the offset core tube.

3. The method for measuring and constructing an offset core tube according to claim 2, characterized in that, After determining the original pre-adjusted coordinate values ​​of the wall columns of each floor of the offset core tube, statistics are performed using an EXCEL spreadsheet.

4. The method for measuring and constructing an offset core tube according to claim 1, characterized in that, The length of the wire feeding hole The following formula is used to determine: ； ； In the formula: - Length of the wire hole; -Given the base length of the wire hole; - Maximum preset Y-coordinate value for offset core tube; - Maximum Y-coordinate value of the offset core tube wall; -Original Y-coordinate values ​​of the offset core tube wall.

5. The method for measuring and constructing an offset core tube according to claim 1, characterized in that, The biased core tube The steps for setting out the original pre-adjusted coordinate values ​​of the walls and columns of each floor include: Based on the aforementioned stringing holes, a zenith instrument is used to transfer the plumb line between floors, and a total station is used to determine the offset core tube. The original pre-adjusted coordinate values ​​of the walls and columns of each floor are used to lay out the horizontal coordinates.

6. The method for measuring and constructing an offset core tube according to claim 1, characterized in that, The above After the construction of each floor section is completed, the offset core tube is obtained. The steps for monitoring the deformation data of walls and columns in each floor section include: exist After the construction of each floor section was completed, a zenith instrument and a total station were used to re-align the sections. The vertical and horizontal coordinates of each floor section were checked and redrawn. Section floor control points coordinates and Coordinates are calculated using the following formula. After the completion of the section floor construction Changes in Y-coordinate and Z-coordinate of control points for each floor segment: ； ； In the formula: -Offset core tube Change in the Y-coordinate of the control points for each floor segment; -Offset core tube Y-coordinate value of the first construction of the control point of each floor section; -Offset core tube Section floor control points at The Y-coordinate value after the completion of the floor section construction; -Offset core tube Change in the Z-coordinate of the control point of each floor segment; -Offset core tube Z-coordinate values ​​of the first construction of the control points of each floor section; -Offset core tube Layer control points at Z-coordinate value after the completion of the section floor construction.

7. The method for measuring and constructing an offset core tube according to claim 6, characterized in that, The iterative calculation of the biased core tube The steps for pre-adjusting the coordinate values ​​of the walls and columns of each floor section include: according to The original preset coordinate values ​​of the floor section and the calculated The changes in the Y and Z coordinates of the control points at each floor level are used to iteratively calculate the offset core tube using the following formula. Pre-set coordinate values ​​for wall columns on each floor section: ； ； In the formula: -After iterative calculation of the biased core tube The Y-coordinate value of the pre-adjusted coordinate values ​​of the wall and column of each floor segment; -Offset core tube The Y-coordinate value of the original preset coordinates of the floor segment; -Offset core tube Change in the Y-coordinate of the control points for each floor segment; -After iterative calculation of the biased core tube Z-coordinate value of pre-adjusted coordinate values ​​for wall columns in each floor segment; -Offset core tube The Z-coordinate value of the original preset coordinate values ​​of the floor segment; -Offset core tube Change in the Z-coordinate of the control point of each floor segment.

8. The method for measuring and constructing an offset core tube according to claim 7, characterized in that, The biased core tube The steps for setting out the pre-adjusted coordinate values ​​of the walls and columns of each floor include: The results of the iterative calculation using a total station with an offset core tube are as follows Y-coordinate value of pre-adjusted coordinates of wall and column sections and Z coordinate value Conduct the layout.

9. An offset core tube measurement and layout system for implementing the construction method of claim 1, characterized in that, include: The modeling unit is used to establish the finite element model of the offset core tube and determine the original pre-adjusted coordinate values ​​of the offset core tube wall columns; The wire-laying hole is located inside the offset core tube; A rectangular horizontal cross-section is provided in the offset core tube of each floor. The length direction of the wire laying hole is consistent with the horizontal deformation pre-adjustment direction of the offset core tube wall column. A steel plate is provided around the wire laying hole, and the steel plate is equipped with scale lines set along the length and width directions of the wire laying hole. The first lofting unit is used to determine the offset core tube. The original pre-adjusted coordinate values ​​of the walls and columns of each floor are used to lay out the horizontal coordinates. Deformation monitoring data acquisition unit, used for... After the construction of each floor section is completed, the offset core tube is obtained. Deformation monitoring data of walls and columns in each floor section; Iterative calculation unit, used to calculate the original pre-adjusted coordinates of the offset core tube wall column and the obtained offset core tube... Deformation monitoring data of walls and columns in each floor section are used to iteratively calculate the offset core tube. Pre-adjusted coordinate values ​​for walls and columns on each floor section; as well as The second lofting unit is used to calculate the offset core tube based on the iterative calculation. Pre-adjusted coordinate values ​​of floor walls and columns for offset core tube Layout of pre-adjusted coordinate values ​​for walls and columns on each floor.

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