Pipe jacking well automatic design and drawing method

Abstract

The application relates to a pipe jacking well automatic design and drawing method, which solves the problem of low design efficiency. The method comprises the following steps: establishing a pipe jacking well type selection database, establishing a complete parameter database including basic parameters and derivative parameters; inputting ground information, pipeline parameters and geological data of a pipe jacking area, obtaining a selected pipe jacking well structure type from the type selection database; establishing a calculation book template based on Mathcad; establishing a steel bar template library; generating an engineering quantity table and a steel bar table based on the parameter database corresponding to the selected pipe jacking well structure type, positioning in cad drawing software, drawing key points and connecting lines to form a structure diagram; associating the parameter database and the steel bar template library, dynamically adjusting the steel bar size and spacing in the template to generate a steel bar diagram; and outputting a complete pipe jacking well structure diagram, a steel bar diagram, an engineering quantity statistical table and a calculation book corresponding to the selected pipe jacking well structure type.

Description

Technical Field

[0001] This application relates to the field of underground pipeline design, specifically to an automatic design and drawing method for pipe jacking wells. Background Technology

[0002] As a crucial starting and receiving structure in underground pipe jacking pipeline engineering, pipe jacking shafts exhibit significant structural diversity. There are over 30 types of pipe jacking shafts. In the traditional design process, designers manually determine the shaft type based on factors such as ground environmental conditions, geological survey data, and pipeline route. This is followed by structural calculations and manual drawing of structural drawings, then reinforcement calculations and drawing of reinforcement diagrams, and finally, manual quantity surveying. This series of design tasks is not only arduous, but also requires restarting the entire design process when geological conditions change or pipeline parameters such as pipe diameter and center elevation are adjusted. This results in low design efficiency and consumes a large amount of human resources. Summary of the Invention

[0003] The present invention aims to overcome at least one of the defects of the prior art and provide an automatic design and drawing method for jacking wells, thereby solving the problem of low design efficiency.

[0004] To address the above problems, this invention proposes an automatic design and drawing method for pipe jacking wells, the method comprising:

[0005] Establish a database for selecting pipe jacking wells;

[0006] The various types of pipe jacking wells are systematically classified according to their structural form, support type, and function, and a complete parameter database is established, including basic parameters and derived parameters.

[0007] Input the ground information, pipeline parameters, and geological data of the area where the pipe jacking is located, and obtain the selected pipe jacking well structure type from the selection database;

[0008] Create a calculation sheet template based on Mathcad;

[0009] Establish a reinforcement formwork drawing library, which includes pile reinforcement drawings, continuous wall reinforcement drawings, inner lining reinforcement drawings, caisson wall reinforcement drawings, internal support reinforcement drawings, opening reinforcement reinforcement drawings, guide wall reinforcement drawings, and corresponding reinforcement tables;

[0010] Based on the structural parameter database, an engineering quantity table is generated, which includes the concrete volume of the well wall, the support engineering volume, the reinforcement engineering volume of the opening, the backing engineering volume of the guide wall, and the excavation and backfilling inside the well.

[0011] Based on the structural parameter database and the rebar template library, a rebar table is generated, which includes rebar number, rebar diameter, rebar type, rebar length, and number of rebars.

[0012] The parameter database corresponding to the selected jacking well structure type is associated with the parameter database, the corresponding parameters are extracted from it, the key points are located in the CAD drawing software, and the key points are drawn and connected to form a structure diagram.

[0013] By associating the parameter database and the rebar template library, the size and spacing of the rebar in the template are dynamically adjusted to generate rebar drawings;

[0014] Output the complete jacking shaft structure diagram, reinforcement diagram, engineering quantity statistics table, and calculation sheet corresponding to the selected jacking shaft structure type.

[0015] This invention leverages the technological advantages of CAD drawing software, Mathcad calculation software, and Excel document processing software to construct an intelligent design interface. Designers only need to input basic ground information, pipeline parameters, and geological data, and the system can automatically complete structural calculations, generating complete pipe jacking shaft structural drawings, reinforcement drawings, and quantity statistics tables within the CAD environment, while simultaneously outputting standardized calculation reports. This innovative solution not only significantly reduces the workload of manual drawing and calculation but also greatly improves the efficiency of design modifications and scheme optimization, providing efficient and reliable technical support for pipe jacking shaft engineering design. Attached Figure Description

[0016] Figure 1 This is the type of jacking well structure in this invention.

[0017] Figure 2 This is a flowchart of an automatic design and drawing method for jacking wells according to the present invention.

[0018] Figure 3 This is a table showing the basic and derived parameters of a jacking well according to the present invention.

[0019] Figure 4 This is a plan view of a unidirectional launch well according to the present invention.

[0020] Figure 5 This is a flowchart of a collaborative force analysis method according to the present invention.

[0021] Figure 6 This is an engineering quantity table diagram according to the present invention.

[0022] Figure 7 This is a schematic diagram illustrating the calculation of the jacking force and intermediate relays in the present invention.

[0023] Figure 8 This is a schematic diagram of the backrest calculation for the jacking working well of the present invention. Detailed Implementation

[0024] The accompanying drawings are for illustrative purposes only and should not be construed as limiting the invention. To better illustrate the following embodiments, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product dimensions; it is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0025] Pipe jacking is a trenchless underground pipeline construction technology that uses hydraulic jacking equipment to gradually push the pipeline into the soil from the starting shaft to the receiving shaft, forming an underground pipeline tunnel. This is crucial for urban areas with heavy traffic, dense populations, numerous surface buildings, and complex underground structures and pipelines. A pipe jacking project includes a working shaft, the jacked pipeline, and a receiving shaft. When using the pipe jacking method, a working shaft is set up at the starting end of the pipeline. Jacking equipment and guide rails are arranged in the working shaft to push the pipeline into the soil. The jacked pipe traverses the soil along the route and finally exits at the receiving shaft for reception.

[0026] This application provides an automatic design and drawing method for jacking wells, such as... Figure 2 The method includes:

[0027] S100: Establish a database for selecting jacking wells;

[0028] Based on extensive engineering experience and current technical specifications, including but not limited to the "Technical Specification for Pipe Jacking in Water Supply and Drainage Engineering" (CECS246), the "Design Specification for Caisson Structures in Water Supply and Drainage Engineering" (GB / T 51153), and the "Technical Specification for Foundation Pit Support in Buildings" (JGJ 120), a database for selecting pipe jacking wells has been established.

[0029] S101: Systematically classify various types of pipe jacking wells according to their structural form, support type, and function, and establish a complete parameter database, including basic parameters and derived parameters;

[0030] Pipe jacking shafts can be categorized by structural type (circular, square, irregular); by support type (caisson, cast-in-place pile, diaphragm wall, etc.); and by function (one-way departure shaft, one-way receiving shaft, two-way departure shaft, two-way receiving shaft, departure-receive shaft, etc.). Therefore, there are approximately 30 types of pipe jacking shafts. Figure 1 .

[0031] By quantifying standard provisions and digitizing engineering experience data, the efficiency and scientific rigor of decision-making in the initial design phase were significantly improved, laying a solid foundation for subsequent detailed design. Due to the diverse types and structural styles of pipe jacking shafts, based on existing engineering drawings and practical experience, various types of pipe jacking shafts were systematically classified according to structural form, support type, and function, establishing a complete structural parameter database and forming parameter tables for each type of pipe jacking shaft. Each parameter table corresponds to a type of pipe jacking shaft structure. The parameter tables include basic parameters such as pipe diameter, pipe center elevation, ground elevation, and formulas. Derived parameters include the minimum net internal length of the working shaft, the opening size of the starting opening, the guide wall length, the shaft bottom elevation, and the support embedment elevation. These derived parameters are calculated from the basic parameters combined with standard requirements and geometric relationships. The main derived parameter calculation formula system includes the following, which prepares for the subsequent automatic generation of structural drawings and reinforcement:

[0032] The formula for calculating the minimum net internal length of the working well is Lmax(L1,L2). max L1 is determined by the length of the pipe jacking machine: L1 = l1 +

[0033] l3+k, L2 = l2+l3+l4+k is determined by the length of the pipe section below the well. l1 is the minimum length when the pipe jacking machine is lowered into the well, l2 is the length of the pipe section lowered into the well, l3 is the length of the jack, l4 is the minimum length of the pipe left in the well, and k is the thickness of the back seat and the top iron and the installation allowance.

[0034] The formula for calculating the opening size of the starting port is as follows: when the outer diameter of the pipe is 800-1800mm, the inner diameter of the pipe through the wall is the outer diameter of the pipe plus 90mm; when the outer diameter of the pipe is 1800-2400mm, the inner diameter of the pipe through the wall is the outer diameter of the pipe plus 120mm; when the outer diameter of the pipe is 3000-4000mm, the inner diameter of the pipe through the wall is the outer diameter of the pipe plus 140mm.

[0035] The formula for calculating the length of the guide wall is: Where r is the inner radius of the lining and t is the thickness of the lining;

[0036] The formula for calculating the elevation of the well bottom plate is as follows: Where Z4 is the elevation of the pipe center, D is the diameter of the opening, and Δh is the minimum clearance specified in the standard.

[0037] S102: Input the ground information, pipeline parameters, and geological data of the area where the pipe jacking is located, and obtain the selected pipe jacking well structure type from the selection database;

[0038] Depending on the environment, by obtaining information such as ground information, pipeline parameters, and geological data of the area where the pipe jacking well is being constructed, the present invention can be used to obtain the pipe jacking structure type that suits the scenario, thereby obtaining the selected pipe jacking well structure type.

[0039] Based on the selected jacking well structure type, a derived parameter table is obtained, such as... Figure 3 The derived parameters are calculated from the basic parameters.

[0040] S103: Create a calculation sheet template based on Mathcad;

[0041] The calculation template library includes, but is not limited to, calculations for pipe jacking force and intermediate intervals, calculations for the backrest of the pipe jacking working shaft, calculations for the inner lining structure of a circular pipe jacking shaft, calculations for caisson structures, calculations for foundation pit support systems, and calculations for supports, etc. Figure 7 and Figure 8 .

[0042] In some embodiments, the calculation of the support of the circular pipe jacking well proposes an easy-to-operate collaborative stress analysis method from the perspective of structural mechanics, such as... Figure 5 The calculation of the inner lining structure of the circular jacking well adopts a synergistic stress analysis, which equates the inner lining structure to an elastic support system with specific stiffness, thereby generating a synergistic working effect between the support system and the inner lining structure, i.e., jointly resisting earth pressure. The support force calculated by the support system is then converted into the internal force acting on the inner lining, and the structural reinforcement calculation of the inner lining is performed. The formula for calculating the stiffness of the elastic support system is as follows: Where k is the elastic support stiffness coefficient, E is the elastic modulus of the lining, A is the cross-sectional area of ​​the lining at a height of 1m, and R is the radius of the lining centerline.

[0043] The formula for calculating the internal force of the lining is based on a closed circular lining ring with a height of 1m. The difference in the internal friction angle of the soil at two points that are 90° apart is 6°. N A =P A ·R·(1+0.7854·ω), M A =0.1488·P A ·R 2 ·ω, where k a1 For the active earth pressure coefficient, k a2 To be with k a1 The active earth pressure coefficient at a 90° position, P0 is the unit support force calculated for the support system, N A For the axial force of the inner lining, M A The bending moment is for the inner lining.

[0044] S104: Establish a reinforcement formwork drawing library. The library includes pile reinforcement drawings, continuous wall reinforcement drawings, inner lining reinforcement drawings, caisson wall reinforcement drawings, internal support reinforcement drawings, opening reinforcement drawings, guide wall reinforcement drawings, and corresponding reinforcement tables.

[0045] S105: Based on the structural parameter database, generate a quantity table, which includes the quantity of concrete for the well wall, the quantity of support works, the quantity of reinforcement works for the opening, the quantity of backing works for the guide wall, and the quantity of excavation and backfilling inside the well; such as Figure 6 .

[0046] S106: Based on the structural parameter database and the rebar template library, generate a rebar table, which includes rebar number, rebar diameter, rebar type, rebar length and number of rebars;

[0047] S107: Associate the parameter database corresponding to the selected jacking well structure type, extract the corresponding parameters, locate them in CAD drawing software, draw key points and connect them to form a structure diagram;

[0048] S108: Associate the parameter database and the rebar template library, dynamically adjust the size and spacing of the rebars in the template, and generate the rebar drawing; the rebar drawing is generated by the corresponding structural type.

[0049] S109: Output the complete jacking shaft structure diagram, reinforcement diagram, engineering quantity statistics table, and calculation sheet corresponding to the selected jacking shaft structure type.

[0050] In some embodiments, the implementation scenario includes surface features such as houses and roads, a pipe diameter of 3.6m, a pipe burial depth of approximately 8.7m, and a geological condition consisting of an upper sand layer and a lower clay layer. After obtaining the above basic parameters, geological and surface information, based on the established pipe jacking well selection database, a preliminary design for a circular support interlocking pile unidirectional launch well is proposed for this scenario. Figure 4 After the selection database determines the structure type of the jacking shaft, the parameter database calculates the derived parameters. The calculation template is then linked to perform structural calculations and modify the corresponding parameters. The parameter database calculates the quantities and reinforcement tables, which are then linked to CAD software to generate the jacking shaft structure drawing. Finally, the reinforcement template library and parameter database generate the reinforcement drawings, reinforcement tables, and quantity tables. In this embodiment, if any step requires modification, the parameters can be changed online, eliminating the need to start the design from scratch.

[0051] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the technical solution of the present invention, and are not intended to limit the specific implementation of the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the claims of the present invention should be included within the protection scope of the claims of the present invention.

Claims

1. A method for automatic design and drawing of pipe jacking wells, characterized in that, The method includes: Establish a database for selecting pipe jacking wells; The various types of pipe jacking wells are systematically classified according to their structural form, support type, and function, and a complete parameter database is established, including basic parameters and derived parameters. Input the ground information, pipeline parameters, and geological data of the area where the pipe jacking is located, and obtain the selected pipe jacking well structure type from the selection database; Create a calculation sheet template based on Mathcad; Establish a reinforcement formwork drawing library, which includes pile reinforcement drawings, continuous wall reinforcement drawings, inner lining reinforcement drawings, caisson wall reinforcement drawings, internal support reinforcement drawings, opening reinforcement reinforcement drawings, guide wall reinforcement drawings, and corresponding reinforcement tables; Based on the parameter database, an engineering quantity table is generated, which includes the concrete volume of the well wall, the support engineering volume, the reinforcement engineering volume of the opening, the backing engineering volume of the guide wall, and the excavation and backfilling inside the well. Based on the parameter database and the rebar template library, a rebar table is generated, which includes rebar number, rebar diameter, rebar type, rebar length, and number of rebars; The parameter database corresponding to the selected jacking well structure type is associated with the parameter database, the corresponding parameters are extracted from it, the key points are located in the CAD drawing software, and the key points are drawn and connected to form a structure diagram. By associating the parameter database and the rebar template library, the size and spacing of the rebar in the template are dynamically adjusted to generate rebar drawings; Output the complete jacking shaft structure drawing, reinforcement drawing, engineering quantity statistics table, and calculation sheet corresponding to the selected jacking shaft structure type; The calculation template includes calculations for pipe jacking force and intermediate intervals, calculations for the backrest of the pipe jacking working shaft, calculations for the inner lining structure of the circular pipe jacking shaft, calculations for the caisson structure, calculations for the foundation pit support system, and calculations for the support. The calculation of the inner lining structure of the circular jacking well adopts a synergistic stress analysis, which treats the inner lining structure as an equivalent elastic support system with specific stiffness, generating a synergistic working effect between the support system and the inner lining structure, i.e., jointly resisting earth pressure. The support force calculated by the support system is inversely calculated as the internal force acting on the inner lining, and then the structural reinforcement of the inner lining is calculated. The formula for calculating the stiffness of the elastic support system is as follows: ,in For the elastic support stiffness coefficient, For inner lining elastic modulus, For the cross-sectional area of ​​the inner lining at a height of 1m, The radius of the inner lining centerline; The formula for calculating the internal force of the lining is based on a closed circular lining ring with a height of 1m. The difference in the internal friction angle of the soil at two points that are 90° apart is 6°. , , , ,in For active earth pressure coefficient, To and Active earth pressure coefficient at a 90° position The unit support force of the support system was calculated. For the axial force of the inner lining, The bending moment is for the inner lining.

2. The automatic design and drawing method for pipe jacking wells according to claim 1, characterized in that, The basic parameters include pipe diameter, pipe center elevation, ground elevation, and formulas. The derived parameters include minimum internal clear length of the working well, opening size of the starting opening, length and height of the rear guide wall, elevation of the well bottom plate, depth of the foundation pit, support embedment elevation, and opening reinforcement elevation. The derived parameters are calculated and generated by combining the basic parameters with specification requirements and geometric relationships.

3. The automatic design and drawing method for pipe jacking wells according to claim 2, characterized in that: The formula for calculating the minimum internal net length of the working well is as follows: The length of the pipe jacking machine is used to determine the length of the pipe jacking machine. Determine the length of the well casing section by pressing down. , This is the minimum length required for the pipe jacking machine to be lowered into the well. The length of the downhole casing section. The length of the jack. The minimum length of pipe to remain inside the well. For the thickness of the rear seat and top iron, and the installation allowance; The formula for calculating the opening size of the starting hole is as follows: when the outer diameter of the pipe is 800-1800mm, the inner diameter of the pipe through the wall is the outer diameter of the pipe plus 90mm; when the outer diameter of the pipe is 1800-2400mm, the inner diameter of the pipe through the wall is the outer diameter of the pipe plus 120mm; when the outer diameter of the pipe is 3000-4000mm, the inner diameter of the pipe through the wall is the outer diameter of the pipe plus 140mm. The formula for calculating the length of the guide wall is as follows: ,in The inner radius of the lining. The thickness of the inner lining; The formula for calculating the elevation of the well bottom plate is as follows: ,in D is the elevation of the pipe center, and D is the diameter of the opening. To standardize the minimum clearance.

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