Duct piece assembling method based on BIM (Building Information Modeling) technology

Abstract

The invention discloses a segment assembling method based on a BIM technology, and the segment assembling method based on the BIM technology is adopted, a BIM model is combined with a shield tail gap and jack stroke real-time monitoring method, and on the basis of a tunnel design curve, a shield tunneling machine posture and a preset target shield tail gap value, the shield tail gap and the jack stroke are monitored in real time. A spliced segment model is formed through BIM rapid modeling, then the posture of the next segment is simulated according to the real-time posture of a shield tunneling machine and the size of a shield tail gap, a basis is provided for selection of splicing point positions of the next segment in a concrete mode, the real-time performance of data is guaranteed, and meanwhile the method has great guiding significance for follow-up construction.

Description

Technical Field

[0001] The invention belongs to the technical field of shield segment installation, and specifically relates to a segment assembling method based on BIM technology. Background Art

[0002] During the shield tunnel construction process, the shield tail gap and jack stroke difference are important reference indicators for controlling the attitude of the shield machine. The shield tail gap is the construction gap between the inner diameter of the shield tail and the outer diameter of the lining, which indirectly reflects the relative position relationship between the assembled segments and the shield tail steel ring in a small space. The jack stroke difference, that is, the difference in the stroke lengths of each thrust jack of the shield machine, directly reflects the angle between the segment and the shield tail shell, and reflects the spatial relationship between the segment and the shield machine. At present, most shield tunnel projects use universal ring segments, that is, the segments have a wedge-shaped amount formed by the width difference, so that in the segment layout process of the tunnel project, the K block (the shortest width of the segment) can be selected to achieve attitude correction, stroke difference optimization and excavation curve fitting;

[0003] Therefore, the shield tail gap and the jack stroke difference are important bases for the selection of K block points during the segment assembly process, which affect the construction quality of the subsequent tunnel. The traditional method to determine the relative position of the segment and the shield machine body is that the on-site personnel first use tools such as a ruler or a tape measure to manually measure the end face shield tail gap of the assembled segment, and then obtain the pipe ring centerline angle of the assembled segment based on the K block position and the wedge shape of the segment, and then obtain the relative position relationship between the assembled segment and the shield tail steel ring through spatial solution. However, this solution method is complex to calculate, and each solution can only obtain the relative position relationship between the assembled segment and the shield tail steel ring in a certain axial plane, and cannot intuitively understand the relative spatial relationship between the segment as a whole and the shield tail steel ring at the three-dimensional level, which will also affect the selection of points for subsequent segment assembly. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a segment assembly method based on BIM technology, which can effectively solve the problem that the prior art can only obtain the relative position relationship between the assembled segment and the shield tail steel ring in a certain axial plane, and cannot intuitively understand the relative spatial relationship between the segment as a whole and the shield tail steel ring at the three-dimensional level, which affects the selection of points for subsequent segment assembly.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is as follows:

[0006] A segment assembly method based on BIM technology comprises the following steps:

[0007] Step 1: Design and calculate the curve segment of the axis of the segment according to the tunnel design curve to obtain the deviation of the current segment, i.e., the pre-correction amount;

[0008] Step 2: Calculate the actual reasonable deviation of the shield machine posture of the curved section compared with the design axis of the single-ring segment based on the pre-correction amount, that is, the shield machine posture range;

[0009] Step 3: According to the attitude range of the shield machine, derive the jack stroke difference before and after the current shield machine excavation;

[0010] Step 4: During the construction phase, excavation is carried out according to the derived jack stroke difference, and a reasonable target shield tail clearance value is preset according to the actual shield machine posture and the jack stroke difference before and after the actual excavation;

[0011] Step 5: According to the preset reasonable target shield tail gap value, obtain the K pre-assembly points of the corresponding segments to be assembled, and conduct trial assembly in the BIM model;

[0012] Step 6: According to the actual posture of the shield machine, the actual posture of the segments and the actual shield tail gap presented in the BIM model, the trial assembled segments are modified to fit the tunnel design curve;

[0013] Step 7: According to the corrected segment simulation posture, establish a three-dimensional model and a two-dimensional cross-sectional view to present the shield tail gap, and guide the subsequent segment assembly according to the recommended installation points of the K block; Step 8: Repeat the above steps 1 to 7 until all the segments are assembled.

[0014] As a preferred solution of the present invention, between step 4 and step 5, a formed tunnel measuring device is used to measure and collect the shield tail gap of the assembled segments in real time, and a single-ring segment 3D model and a shield machine 3D model are respectively established according to the design drawing of the single-ring segment and the mechanical design drawing of the shield machine; at the same time, according to the posture and position of the existing assembled segments, BIM rapid modeling is used to form a series model of multiple-ring assembled segments, which presents the real-time posture of the assembled segments and the three-dimensional position relationship between the segments and the shield machine in three dimensions.

[0015] As a preferred embodiment of the present invention, the single-ring segments are all universal segments, and the single-ring segments include a capping block, two adjacent blocks and four standard blocks, and are sequentially spliced ​​into a ring in the splicing order of the standard block—the adjacent block—the capping block.

[0016] As a preferred embodiment of the present invention, the three-dimensional model of the single-ring segment is an oblique hollow cylinder, and the width of the single-ring segment along the axial direction gradually changes from LX to L+X, wherein the position with a width of LX is located at the center of the capping block, and the position with a width of L+X is located opposite to the center of the capping block.

[0017] As a preferred solution of the present invention, 19 points are determined at equal angles along the circumference of the outer side wall of the single-ring segment, and a longitudinal bolt hole is respectively arranged at each point, so that the corresponding central angle between two adjacent longitudinal bolt holes is 360° / 19; along the assembly line, the bolt holes corresponding to the points of the front and rear two single-ring segments are connected by bolts to complete the docking of the front and rear two single-ring segments.

[0018] As a preferred solution of the present invention, during the series connection process, the points corresponding to the capping blocks of the single-ring segments connected front and back are connected to each other to obtain a line with the maximum curvature; the points at the position with a width of LX and the position with a width of L+X of the single-ring segments connected front and back are connected to each other to obtain a straight line with zero curvature.

[0019] As a preferred solution of the present invention, the actual shield machine posture is the offset between the front, middle and rear points of the shield machine's central axis and the tunnel design centerline, which is divided into vertical and horizontal directions, and the offset is no more than 50 mm.

[0020] As a preferred embodiment of the present invention, the real-time posture of the assembled segments is the deviation of the assembled segments relative to the design center line of the tunnel and the position of the shield machine during the shield tunneling process, and the deviation is no more than 50 mm.

[0021] The segment assembly method based on BIM technology provided by the present invention has the following beneficial effects compared with the prior art:

[0022] A segment assembly method based on BIM technology is adopted in the present invention. Through the BIM model combined with the method of real-time monitoring of the shield tail gap and the jack stroke, on the basis of the tunnel design curve, the shield machine posture and the preset target shield tail gap value, a segment model that has been assembled is formed through BIM rapid modeling. Then, the posture of the next ring of segments is simulated according to the real-time posture of the shield machine and the size of the shield tail gap, which provides a basis for selecting the assembly points of the next ring of segments, ensures the real-time nature of the data, and has great guiding significance for subsequent construction. DETAILED DESCRIPTION

[0023] The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0024] It should be understood that the present invention uses the terms "first", "second", etc. to describe various information, but these information should not be limited to these terms, and these terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present invention, "first" information may also be referred to as "second" information, and similarly, "second" information may also be referred to as "first" information.

[0025] A preferred embodiment of the present invention provides a segment assembly method based on BIM technology, which comprises the following steps:

[0026] Step 1: Design and calculate the curve segment of the axis of the segment according to the tunnel design curve to obtain the deviation of the current segment, i.e., the pre-correction amount;

[0027] Step 2: Calculate the actual reasonable deviation of the shield machine posture of the curved section compared with the design axis of the single-ring segment based on the pre-correction amount, that is, the shield machine posture range;

[0028] Step 3: According to the attitude range of the shield machine, derive the jack stroke difference before and after the current shield machine excavation;

[0029] Step 4: During the construction phase, excavation is carried out according to the derived jack stroke difference, and a reasonable target shield tail clearance value is preset according to the actual shield machine posture and the jack stroke difference before and after the actual excavation;

[0030] Step 5: According to the preset reasonable target shield tail gap value, obtain the K pre-assembly points of the corresponding segments to be assembled, and conduct trial assembly in the BIM model;

[0031] Step 6: According to the actual posture of the shield machine, the actual posture of the segments and the actual shield tail gap presented in the BIM model, the trial-assembled segments are corrected to fit the tunnel design curve; it should also be noted that when correcting the trial-assembled segments, the K block points in the model can be changed, and the K block point position can be directly judged visually to find the best effect, so as to fit the tunnel design curve.

[0032] Step 7: According to the corrected segment simulation posture, a 3D model and a 2D cross-section diagram are established to present the shield tail gap, and the subsequent segment assembly is guided according to the recommended installation points of the K block;

[0033] Step 8: Repeat steps 1 to 7 above until all the pipe segments are assembled.

[0034] A segment assembly method based on BIM technology is adopted in the present invention. Through the BIM model combined with the method of real-time monitoring of the shield tail gap and the jack stroke, on the basis of the tunnel design curve, the shield machine posture and the preset target shield tail gap value, a segment model that has been assembled is formed through BIM rapid modeling. Then, the posture of the next ring of segments is simulated according to the real-time posture of the shield machine and the size of the shield tail gap, which provides a basis for selecting the assembly points of the next ring of segments, ensures the real-time nature of the data, and has great guiding significance for subsequent construction.

[0035] In this scheme, between step 4 and step 5, a formed tunnel measuring device is used to measure and collect the shield tail gap of the assembled segments in real time, and a single-ring segment 3D model and a shield machine 3D model are respectively established according to the design drawing of the single-ring segment and the mechanical design drawing of the shield machine; at the same time, according to the posture and position of the existing assembled segments, BIM rapid modeling is used to form a series model of multiple-ring assembled segments, which presents the real-time posture of the assembled segments and the three-dimensional position relationship between the segments and the shield machine in three dimensions.

[0036] Among them, the single-ring segments are all universal segments, and the single-ring segments include a capping block, two adjacent blocks and four standard blocks, and are sequentially spliced ​​into a ring in the splicing order of the standard block—the adjacent block—the capping block; the three-dimensional model of the single-ring segment is an oblique hollow cylinder, and the width of the single-ring segment along the axial direction gradually changes from LX to L+X, wherein the position with a width of LX is located at the center of the capping block, and the position with a width of L+X is located opposite to the center of the capping block.

[0037] Exemplarily, 19 points are determined at equal angles along the circumference of the outer wall of the single-ring segment, and a longitudinal bolt hole is set corresponding to each point, so that the corresponding central angle between two adjacent longitudinal bolt holes is 360° / 19; along the assembly line, the bolt holes corresponding to the points of the front and rear two single-ring segments are connected by bolts to complete the docking of the front and rear two single-ring segments.

[0038] Exemplarily, during the series connection process, the points corresponding to the capping blocks of the single-ring segments that are connected front and back are connected to each other to obtain a line with the maximum curvature; the points at the position with a width of LX and the position with a width of L+X of the single-ring segments that are connected front and back are connected to each other to obtain a straight line with zero curvature. Therefore, by changing the installation points of the capping blocks, different curvature curves can be obtained, and the real-time posture of the assembled segments can be presented in three dimensions.

[0039] It should also be noted that the actual shield machine posture is the offset of the front, middle and rear points of the shield machine's central axis from the tunnel design center line, which is divided into vertical and horizontal directions, and the offset is no more than 50mm; the real-time posture of the assembled segments is the deviation of the assembled segments relative to the tunnel design center line and the position of the shield machine during the shield excavation process, and the deviation is no more than 50mm.

[0040] At the same time, when adjusting the assembly points of the single-ring segments, the travel difference of the tunneling jack, the shield tail gap and the angle between the shield tail and the single-ring segments are adjusted accordingly to make the shield tail gap uniform and keep the segment axis and the shield tail axis basically parallel.

[0041] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A segment assembly method based on BIM technology, characterized in that: The following steps are involved: Step 1: Design and calculate the curve segment of the axis of the segment according to the tunnel design curve to obtain the deviation of the current segment, i.e., the pre-correction amount; Step 2: Calculate the actual reasonable deviation of the shield machine posture of the curved section compared with the design axis of the single-ring segment based on the pre-correction amount, that is, the shield machine posture range; Step 3: According to the attitude range of the shield machine, derive the jack stroke difference before and after the current shield machine excavation; Step 4: During the construction phase, excavation is carried out according to the derived jack stroke difference, and a reasonable target shield tail clearance value is preset according to the actual shield machine posture and the jack stroke difference before and after the actual excavation; Step 5: According to the preset reasonable target shield tail gap value, obtain the K pre-assembly points of the corresponding segments to be assembled, and conduct trial assembly in the BIM model; Step 6: According to the actual posture of the shield machine, the actual posture of the segments and the actual shield tail gap presented in the BIM model, the trial assembled segments are modified to fit the tunnel design curve; Step 7: According to the corrected segment simulation posture, a 3D model and a 2D cross-section diagram are established to present the shield tail gap, and the subsequent segment assembly is guided according to the recommended installation points of the K block; Step 8: Repeat steps 1 to 7 above until all the pipe segments are assembled.

2. The segment assembly method based on BIM technology according to claim 1 is characterized in that: Between step 4 and step 5, the formed tunnel measuring device is used to measure and collect the shield tail gap of the assembled segments in real time, and a single-ring segment 3D model and a shield machine 3D model are established according to the design drawing of the single-ring segment and the mechanical design drawing of the shield machine, respectively. At the same time, according to the posture and position of the existing assembled segments, BIM rapid modeling is used to form a series model of multiple-ring assembled segments, which presents the real-time posture of the assembled segments and the three-dimensional position relationship between the segments and the shield machine in three dimensions.

3. The segment assembly method based on BIM technology according to claim 2 is characterized in that: The single-ring segments are all universal segments, and include a capping block, two adjacent blocks and four standard blocks, and are sequentially spliced ​​into a ring in the order of the standard block—the adjacent block—the capping block.

4. The segment assembly method based on BIM technology according to claim 2 is characterized in that: The three-dimensional model of the single-ring segment is an inclined hollow cylinder, and the width of the single-ring segment along the axial direction gradually changes from LX to L+X, wherein the position with a width of LX is located at the center of the capping block, and the position with a width of L+X is located opposite to the center of the capping block.

5. The segment assembly method based on BIM technology according to claim 2 is characterized in that: 19 points are determined at equal angles along the circumference of the outer wall of the single-ring segment, and a longitudinal bolt hole is set corresponding to each point, so the corresponding central angle between two adjacent longitudinal bolt holes is 360° / 19; along the assembly line, the bolt holes corresponding to each point of the front and rear single-ring segments are connected by bolts to complete the docking of the front and rear single-ring segments.

6. The segment assembly method based on BIM technology according to claim 5 is characterized in that: During the series connection process, the points corresponding to the capping blocks of the single-ring segments that are connected front and back are connected to each other to obtain a line with the maximum curvature; the points at the position with a width of LX and the position with a width of L+X of the single-ring segments that are connected front and back are connected to each other to obtain a straight line with zero curvature.

7. The segment assembly method based on BIM technology according to claim 1 is characterized in that: The actual shield machine posture is the offset between the front, middle and rear points of the shield machine's central axis and the tunnel design centerline, which is divided into vertical and horizontal directions, and the offset is no more than 50mm.

8. The segment assembly method based on BIM technology according to claim 2 is characterized in that: The real-time posture of the assembled segments is the deviation of the assembled segments relative to the design center line of the tunnel and the position of the shield machine during the shield excavation process, and the deviation shall not exceed 50mm.