A method for arch structure construction based on three-point positioning posture monitoring

Abstract

The present invention discloses a method for constructing an arch structure based on three-point positioning posture monitoring, including: step one, constructing tire frames on both sides; step two, establishing a digital twin model, creating a digital twin model according to a structural model; step three, constructing a spatial coordinate system, constructing a spatial coordinate system in the digital twin model; step four, selecting three monitoring points, selecting the top midpoint P1 of the arch steel structure and one point P2 and one point P3 at each end of the arch steel structure as three monitoring points; step five, visualizing the monitoring position, and simulating the lifting process of the arch steel structure through the digital twin model; step six, calculating the posture parameters; step seven, lifting the arch steel structure, and vertically lifting the arch steel structure through a lifting device; step eight, adjusting the arch steel structure. The method still ensures the accuracy of lifting and installation when the arch steel structure is deformed due to its own weight and the posture is constantly changing, and solves practical problems in construction.

Description

Technical Field

[0001] The invention relates to the technical field of arch steel structure construction, and in particular to an arch structure construction method based on three-point positioning posture monitoring. Background Art

[0002] Arch structures are widely used in bridges and building structures for their good stress-bearing performance and beautiful architectural form. With the development of society and the progress of science and technology, the use of new materials and new processes, and the emergence of advanced computing theories and analysis tools, modern buildings, especially those with large-span structures, are developing in the direction of super-high, large spans, and unique shapes. Arch structures are one of the most commonly used structural types in modern buildings. Using large-span arch structures as the load-bearing structural form of building structures can obtain large areas of column-free indoor space. Therefore, in some construction projects with special requirements for space, arch structures are generally favored by owners and designers. When installing an arch structure, the components themselves will deform due to their own weight. Generally, the arch span will bend downward and the two ends will deform outward, which will seriously affect the installation accuracy. In addition, the arch structure will continue to swing during the lifting process, and its posture will continue to change, which will also affect the subsequent installation.

[0003] The invention patent with application number 201210274376.2 discloses a method for lifting and constructing an arch structure in a "zero deformation" state. The method is based on the self-balancing principle. A flexible component is added under the arch structure to form an internal force self-balancing structure. The flexible component is tensioned to keep the arch structure in its designed shape, and lifting and construction are performed in a self-balancing state. Summary of the invention

[0004] The purpose of the present invention is to provide an arch structure construction method based on three-point positioning posture monitoring, which solves the problem of poor docking accuracy caused by deformation and posture changes during the lifting of the arch steel structure.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] A method for constructing an arch structure based on three-point positioning posture monitoring, wherein the arch structure comprises two tire frames and an arch steel structure, wherein the arch steel structure is supported between the two tire frames, and the arch steel structure comprises an arch foot section, an arch top section and a closing section, and comprises the following steps:

[0007] Step 1: construct the tire frames on both sides and assemble an arch foot section on each tire frame;

[0008] Step 2: Establish a digital twin model and create a digital twin model based on the structural model;

[0009] Step 3: Construct a spatial coordinate system in the digital twin model.

[0010] Step 4: Select three monitoring points, the midpoint of the top of the arch section as monitoring point P1, and one point at each end of the arched steel structure as monitoring point P2 and monitoring point P3, and the plane formed by the three monitoring points is perpendicular to the ground;

[0011] Step 5: Visualize the monitoring position, take the center of the triangle constructed by the three monitoring points as the anchor point, anchor it with the digital twin model, obtain the Beidou coordinate values ​​of the three monitoring points in real time, namely P1 (x1, y1, z1), P2 (x2, y2, z2) and P3 (x3, y3, z3), and then use the Beidou coordinates of the three monitoring points to drive the position of the digital twin model in real time, and simulate the lifting process of the vault section through the digital twin model;

[0012] Step 6: Calculate the attitude parameters. Create vector v1 and vector v2 in the spatial coordinate system based on the three monitoring points. Use vector v1 and vector v2 to calculate the pitch angle Pitch, yaw angle Yaw and roll angle Roll of the plane formed by the three monitoring points respectively.

[0013] Step 7: lift the vault section, build the lattice columns, set a lifting device on the top of the lattice columns, and lift the vault section vertically through the lifting device;

[0014] Step 8: Adjust the vault segment, and adjust the shape and posture of the vault segment in real time during the lifting process according to the simulation results of the digital twin model to ensure that both ends of the vault segment are accurately docked with the arch foot segment after the vault segment is lifted to the designed position;

[0015] Step nine: Install the closed section and perform high-altitude patching in pieces.

[0016] Preferably, a tension beam for balancing the horizontal thrust generated by the arched steel structure is connected between the tire frames on both sides.

[0017] Preferably, in step three, the center point of the building interior is selected as the coordinate origin of the spatial coordinate system, the direction away from the center of the earth is selected as the Y axis, the line connecting the junction of the arch segment and the ground and the coordinate origin is selected as the X axis, and the axis perpendicular to the X axis and the Y axis and passing through the coordinate origin is selected as the Z axis.

[0018] Preferably, in step six:

[0019] Yaw = arctan2(v 1y , v 1x ), where v 1x and v 1y are the components of vector v1 on the x-axis and y-axis respectively;

[0020] Pitch=arctan2(-n z ,sqrt(nx * n x +n y * n y )), where n x , n y , n z are the components of vector n on the x, y, and z axes respectively;

[0021] Roll = arctan2(v 2z , v 2y ) where v 2z , v 2y are the components of vector v2 on the z-axis and y-axis.

[0022] Preferably, the expression of the vector v1 is: v1=P2-P1; the expression of the vector v2 is: v2=P3-P1, and the expression of the normal vector n is n=v1*v2.

[0023] Preferably, a temporary tensioning assembly is connected between the two ends of the vault segment, and the shape of the vault segment is adjusted by the temporary tensioning assembly.

[0024] Preferably, the temporary tensioning assembly includes a steel leg and two oil cylinders, the two oil cylinders are installed at both ends of the lower middle portion of the arch section through anchors, and the steel leg is tensioned and connected between the two oil cylinders.

[0025] Preferably, the triangle formed by the three monitoring points P1, P2 and P3 is an equilateral triangle.

[0026] Preferably, the lifting device includes a conversion beam, a supporting beam, a lifting beam and a lifting cylinder. The conversion beams are installed on the top of two oppositely arranged lattice columns. Two supporting beams are arranged in parallel and spaced apart between the two oppositely arranged lattice columns and on the top of the conversion beam. The lifting cylinder is installed through the lifting beam in the gap between the two supporting beams.

[0027] Preferably, in step nine, a lifting machine is used to insert the segments at high altitude. When closing, the lower chord segments are installed first, and then the upper chord segments are installed. The closing sections at both ends of the arch segment need to be closed synchronously, and an arch structure is formed after completion.

[0028] In the present invention, the triangle formed by the three monitoring points is an equilateral triangle, which can have a certain fault tolerance when the data is not received in time at certain special moments, causing point data abnormalities or hysteresis. The stability is improved, the position information can be accurately monitored as much as possible, and the data reliability is improved. When calculating, the data of the three monitoring points can maintain a small degree of abnormal posture deviation deformation, and no direction change will occur.

[0029] Taking data reliability as the first priority, three points were selected at the top of the arched steel structure, with monitoring point P1 as the highest point in the center to avoid metal structures blocking the sensor from receiving Beidou satellite signals. The signal receiving environment was kept as unobstructed as possible to obtain point coordinates normally. Monitoring points P2 and P3 were two points lower in height than point 2, and the plane formed by the three points was ensured to be perpendicular or nearly perpendicular to the ground.

[0030] This method monitors the stability of the arched steel structure during the lifting process with as few monitoring devices as possible to ensure that its posture is within a reasonable range of change during the lifting process. The Beidou coordinate values ​​of the three monitoring points are used to deduce and calculate the changes in the posture and position of the arched steel structure, thereby achieving the accuracy and real-time monitoring of the digital twin model. The digital twin model is used to guide the construction process, overcoming the problem that the components themselves will deform due to their own weight, which seriously affects the installation accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is the front view of the overall structure of the present invention;

[0032] Figure 2 A schematic diagram of a spatial coordinate system constructed for the present invention;

[0033] Figure 3 A schematic diagram of three monitoring points selected on the arched steel structure of the present invention;

[0034] Figure 4 It is a schematic diagram of the roll angle change of the arched steel structure (front view) of the present invention;

[0035] Figure 5 It is a schematic diagram of the yaw angle change of the arched steel structure (top view) of the present invention;

[0036] Figure 6 It is a schematic diagram of the pitch angle variation of the arched steel structure (left view) of the present invention;

[0037] Figure 7 It is a schematic diagram of the structure of the lifting device of the present invention;

[0038] In the figure: 1. arched steel structure; 2. tire frame; 3. lattice column; 4. lifting device; 5. temporary tensioning assembly; 6. tension beam; 10. arch foot section; 11. arch top section; 12. closing section; 110. monitoring point P1; 111. monitoring point P2; 112. monitoring point P3; 40. conversion beam; 41. supporting beam; 42. lifting beam; 43. lifting cylinder; 50. steel foot line; 51. cylinder. DETAILED DESCRIPTION

[0039] The present invention will be further described below in conjunction with the accompanying drawings:

[0040] like Figure 1 to Figure 7 The arch structure construction method based on three-point positioning posture monitoring is shown, the arch structure includes two tire frames 2 and an arch steel structure 1, the arch steel structure 1 is supported between the two tire frames 2, and the arch steel structure 1 includes an arch foot section 10, an arch top section 11 and a closing section 12, and includes the following steps:

[0041] Step 1, construct the tire frames 2 on both sides. According to the construction drawings, first construct the ground part, and then construct the tire frame above the ground part. Assemble an arch foot section 10 on each tire frame 2, and connect a tension beam 6 between the tire frames 2 on both sides to balance the horizontal thrust generated by the arched steel structure 1.

[0042] Step 2: Establish a digital twin model and create a digital twin model based on the structural model;

[0043] Step 3: Construct a spatial coordinate system in the digital twin model.

[0044] Specifically, the center point of the building interior is selected as the origin of the spatial coordinate system, the direction away from the center of the earth is selected as the Y axis, the line connecting the arch section 11 and the ground and the origin of the coordinate is selected as the X axis, and the axis perpendicular to the X axis and the Y axis and passing through the origin of the coordinate is selected as the Z axis;

[0045] Step 4: Select three monitoring points, the midpoint of the top of the arch section 11 is selected as the monitoring point P1110, and one point at each end of the arched steel structure 1 is selected as the monitoring point P2111 and the monitoring point P3112, and the plane formed by the three monitoring points is perpendicular to the ground;

[0046] Step 5: Visualize the monitoring position, take the center of the triangle constructed by the three monitoring points as the anchor point, anchor it with the digital twin model, obtain the Beidou coordinate values ​​of the three monitoring points, namely P1 (x1, y1, z1), P2 (x2, y2, z2) and P3 (x3, y3, z3) in real time, and then use the Beidou coordinates of the three monitoring points to drive the position of the digital twin model in real time, and simulate the lifting process of the vault section 11 through the digital twin model;

[0047] Step 6: Calculate the attitude parameters. Create vector v1 and vector v2 in the spatial coordinate system based on the three monitoring points. Use vector v1 and vector v2 to calculate the pitch angle Pitch, yaw angle Yaw and roll angle Roll of the plane formed by the three monitoring points respectively.

[0048] Yaw: It is the rotation angle of the arched steel structure 1 around the y-axis, which is obtained by calculating the angle between the projection of the vector v1 on the xy plane and the positive direction of the x-axis;

[0049] Pitch: It is the rotation angle of the arched steel structure 1 around the z-axis, which is usually determined by calculating the angle between the vector n and the xy plane;

[0050] Roll angle: It is the rotation angle of the arched steel structure 1 around the x-axis, which can be obtained by calculating the angle between v1 and v2 and the inherent axis of the object in the plane formed;

[0051] Where Yaw = arctan2(v 1y , v 1x ), where v 1x and v 1y They are the components of vector v1 on the x-axis and y-axis respectively, and the expression of vector v1 is: v1=P2-P1;

[0052] Roll = arctan2(v 2z , v 2y ) where v 2z , v 2y It is the component of vector v2 on the z-axis and y-axis. The expression of vector v2 is: v2=P3-P1;

[0053] Pitch=arctan2(-n z ,sqrt(n x * n x +n y * n y )), where n x , n y , n z They are the components of vector n on the x, y, and z axes respectively. The normal vector n is expressed as n=v1*v2;

[0054] Step 7: lift the vault segment 11, build the lattice column 3, set a lifting device 4 on the top of the lattice column 3, and lift the vault segment 11 vertically through the lifting device 4;

[0055] The lifting device 4 includes a conversion beam 40, a supporting beam 41, a lifting beam 42 and a lifting cylinder 43. The conversion beam 40 is installed on the top of the two oppositely arranged lattice columns 3. Two supporting beams 41 are arranged in parallel and spaced apart between the two oppositely arranged lattice columns 3 and on the top of the conversion beam 40. The lifting cylinder 43 is installed in the gap between the two supporting beams 41 through the lifting beam 42. The number and model of the lifting cylinder 43 are determined according to the lifting weight, and the safety factor is considered to be not less than 1.2.

[0056] Step 8: Adjust the vault segment 11, and adjust the shape and posture of the vault segment 11 in real time during the lifting process according to the simulation results of the digital twin model to ensure that both ends of the vault segment 11 are accurately docked with the arch foot segment 10 after the vault segment 11 is lifted to the designed position;

[0057] Specifically, a temporary tensioning assembly 5 is connected between the two ends of the arch segment 11, and the shape of the arch segment 11 is adjusted by the temporary tensioning assembly 5. The temporary tensioning assembly 5 includes a steel leg 50 and two oil cylinders 51. The two oil cylinders 51 are installed at the two ends of the middle and lower part of the arch segment 11 through anchors, and the steel leg 50 is tensioned and connected between the two oil cylinders 51;

[0058] The purpose of the temporary tensioning assembly 5 is to control the aerial posture or deformation of the arch segment 11. After the arch segment 11 is separated from the supporting frame, the arch segment 11 will generate tension on both sides. The temporary tensioning assembly 5 is used to offset the horizontal thrust generated by the arch structure of the arch segment 11 under the deadweight state and the lifting and loading state, so that the arch segment 11 will not generate structural deformation caused by construction during the lifting process and after it is in place. After the entire arch structure is closed, the tension of the temporary construction cable is released;

[0059] Step nine, the closing section 12 is installed and the pieces are embedded in the air. Since the large-span arch structure has a long span, the steel structure has a high thermal conductivity and is greatly affected by the temperature load, the highest and lowest temperatures at the project site should be analyzed with reference to the temperature. The closing temperature should be 15°C ± 5°C. The closing section is divided into pieces and assembled into small units on the ground. A lifting machinery is used to embed the pieces in the air. When closing, the lower chord pieces are installed first, and then the upper chord pieces. The closing sections 12 at both ends of the arch section 11 need to be closed simultaneously, and an arch structure is formed after completion.

[0060] The change of the Roll value of the arch section 11 is divided into two situations: first, if the monitoring point P2 is excessively raised, the height of the monitoring point P3 is appropriately raised; second, if the monitoring point P3 is excessively raised, the height of the monitoring point P2 is appropriately raised.

[0061] The change of the Yaw value of the arch section 11 can be divided into two cases: first, the monitoring point P2 moves backward, and the monitoring point P2 is appropriately moved forward; second, the monitoring point P3 moves backward, and the monitoring point P3 is appropriately moved forward.

[0062] The change of the pitch value of the vault segment 11 can be divided into two cases: first, the monitoring point P1 moves backward, and the monitoring point P1 is appropriately moved forward; second, the monitoring point P1 moves forward, and the monitoring point P1 is appropriately moved backward.

[0063] The above embodiments are only some illustrations of the concept and implementation of the present invention, and are not intended to limit the same. Under the concept of the present invention, technical solutions that have not been substantially changed are still within the scope of protection.

Claims

1. A method for constructing an arch structure based on three-point positioning posture monitoring, the arch structure comprising two frames (2) and an arch steel structure (1), the arch steel structure (1) being supported between the two frames (2), the arch steel structure (1) comprising an arch foot section (10), an arch top section (11) and a closing section (12), characterized in that: The following steps are involved: Step 1: construct the tire frames (2) on both sides, and assemble an arch foot section (10) on each of the tire frames (2); Step 2: Establish a digital twin model and create a digital twin model based on the structural model; Step 3: Construct a spatial coordinate system in the digital twin model. Step 4: Select three monitoring points, the midpoint of the top of the arch section (11) as the monitoring point P1 (110) and one point at each end of the arched steel structure (1) as the monitoring point P2 (111) and the monitoring point P3 (112), and the plane formed by the three monitoring points is perpendicular to the ground; Step 5: Visualize the monitoring position, take the center of the triangle constructed by the three monitoring points as the anchor point, anchor it with the digital twin model, obtain the Beidou coordinate values ​​of the three monitoring points, namely P1 (x1, y1, z1), P2 (x2, y2, z2) and P3 (x3, y3, z3) in real time, and then use the Beidou coordinates of the three monitoring points to drive the position of the digital twin model in real time, and simulate the lifting process of the vault section (11) through the digital twin model; Step 6: Calculate the attitude parameters. Create vector v1 and vector v2 in the spatial coordinate system based on the three monitoring points. Use vector v1 and vector v2 to calculate the pitch angle (Pitch), yaw angle (Yaw) and roll angle (Roll) of the plane formed by the three monitoring points respectively. Step 7: lifting the vault segment (11), constructing the lattice column (3), arranging a lifting device (4) on the top of the lattice column (3), and vertically lifting the vault segment (11) by means of the lifting device (4); Step 8: Adjust the vault segment (11), and adjust the shape and posture of the vault segment (11) in real time during the lifting process according to the simulation results of the digital twin model, so as to ensure that both ends of the vault segment (11) are accurately docked with the arch foot segment (10) after the vault segment (11) is lifted to the designed position; Step 9: Install the closing section (12) and perform high-altitude patching in sections; A temporary tensioning assembly (5) is connected between the two ends of the arch section (11), and the temporary tensioning assembly (5) comprises a steel leg wire (50) and two oil cylinders (51). The two oil cylinders (51) are installed at the two ends of the middle and lower part of the arch section (11) through anchors, and the steel leg wire (50) is tensioned and connected between the two oil cylinders (51).

2. The arch structure construction method based on three-point positioning posture monitoring according to claim 1 is characterized in that: A tension beam (6) is connected between the tire frames (2) on both sides and is used to balance the horizontal thrust generated by the arched steel structure (1).

3. The arch structure construction method based on three-point positioning posture monitoring according to claim 1 is characterized in that: In step 3, the center point of the building interior is selected as the coordinate origin of the spatial coordinate system, the direction away from the center of the earth is selected as the Y axis, the line connecting the arch section (11) and the ground and the coordinate origin is selected as the X axis, and the axis perpendicular to the X axis and the Y axis and passing through the coordinate origin is selected as the Z axis.

4. The arch structure construction method based on three-point positioning posture monitoring according to claim 3 is characterized in that: In step six: Yaw = arctan2(v 1y , v 1x ), where v 1x and v 1y are the components of vector v1 on the x-axis and y-axis respectively; Pitch=arctan2(-n z ,sqrt(n x * n x +n y * n y )), where n x , n y , n z are the components of vector n on the x, y, and z axes respectively; Roll = arctan2(v 2z , v 2y ) where v 2z , v 2y are the components of vector v2 on the z-axis and y-axis.

5. The arch structure construction method based on three-point positioning posture monitoring according to claim 4 is characterized in that: The expression of the vector v1 is: v1=P2-P1; the expression of the vector v2 is: v2=P3-P1, and the expression of the normal vector n is n=v1*v2.

6. The arch structure construction method based on three-point positioning posture monitoring according to claim 1 is characterized in that: A temporary tensioning assembly (5) is connected between the two ends of the arch segment (11), and the shape of the arch segment (11) is adjusted by means of the temporary tensioning assembly (5).

7. The arch structure construction method based on three-point positioning posture monitoring according to claim 6 is characterized in that: The temporary tensioning assembly (5) comprises a steel leg wire (50) and two oil cylinders (51), wherein the two oil cylinders (51) are installed at both ends of the lower middle portion of the arch section (11) via anchors, and the steel leg wire (50) is tensionedly connected between the two oil cylinders (51).

8. The arch structure construction method based on three-point positioning posture monitoring according to claim 1 is characterized in that: The triangle formed by the three monitoring points P1 (110), P2 (111) and P3 (112) is an equilateral triangle.

9. The arch structure construction method based on three-point positioning posture monitoring according to claim 1 is characterized in that: The lifting device (4) comprises a conversion beam (40), a supporting beam (41), a lifting beam (42) and a lifting cylinder (43); the conversion beam (40) is installed on the top of two lattice columns (3) arranged opposite to each other; two supporting beams (41) are arranged in parallel and spaced apart between the two lattice columns (3) arranged opposite to each other and on the top of the conversion beam (40); and the lifting cylinder (43) is installed at a gap between the two supporting beams (41) through the lifting beam (42).

10. The arch structure construction method based on three-point positioning posture monitoring according to claim 1, characterized in that: In step nine, a lifting machine is used to insert the segments at high altitude. When closing, the lower chord segments are installed first, and then the upper chord segments are installed. The closing sections (12) at both ends of the arch section (11) need to be closed synchronously, and an arch structure is formed after completion.

Images