A method for relocating pipelines in the early stages of subway tunnel construction

Abstract

This invention discloses a method for relocating pipelines in the early stages of subway tunnel construction. Before relocating the pipelines, the method obtains information such as the type of cable to be relocated, the tensile strength per unit length of the cable, the required net distance between the relocated pipeline and the tunnel segments, and the width of the steel ring installation location. Based on this information, the length of the pipeline to be relocated is calculated. Since the pipeline is fixed to the tunnel wall at fixed points, the relocation process requires cutting these fixed points. The number of fixed points to be cut is calculated based on the calculated length of the pipeline. Cutting these calculated fixed points before relocating the pipeline effectively improves construction efficiency and reduces the consumption of manpower and resources during construction.

Description

Technical Field

[0001] This invention relates to the field of subway tunnel construction methods, and more particularly to a method for relocating pipelines in the early stages of subway tunnel construction. Background Technology

[0002] During the construction of subway tunnels, before steel ring reinforcement, it is necessary to relocate the relevant pipelines within the reinforcement area. The relocated pipelines include leaky cables, lighting lines, 35K cables, low-voltage cables, optical fibers, and other cables. The pipeline relocation must be confirmed by pipeline professionals. After the tunnel reinforcement is completed, the relocated pipelines also need to be restored.

[0003] In existing construction methods, pipelines are usually removed and relocated to the designated positions at the same time. It is impossible to accurately obtain the length of different cables that need to be relocated and the number of fixing points that need to be cut before the pipelines are relocated. This results in low construction efficiency and excessive consumption of manpower and resources. Summary of the Invention

[0004] The main objective of this invention is to propose a method for relocating pipelines in the early stages of subway tunnel construction, aiming to solve the problem of low construction efficiency in existing pipeline relocation methods.

[0005] To achieve the above objectives, this invention proposes a method for relocating pipelines in the early stages of subway tunnel construction, wherein the pipeline relocation method includes:

[0006] Obtain information on the pipelines that need to be relocated and the width of the steel ring installation location. The pipeline information includes the type of cable, the tensile strength per unit length of the cable, and the net distance between the relocated pipeline and the tunnel segment.

[0007] Based on the information of the pipeline to be relocated and the width of the steel ring installation position, calculate the length of the pipeline to be relocated;

[0008] Calculate the number of fixed points that need to be cut based on the length of the pipeline to be re-arranged as required;

[0009] Cut the fixed point and reroute the pipeline.

[0010] Optionally, the types of cables include high-voltage cables, low-voltage cables, lighting circuit cables, and optical fibers.

[0011] Optionally, the step of calculating the length of the pipeline to be relocated, based on information about the pipeline to be relocated and the width of the steel ring installation location, includes:

[0012] Calculate and obtain a = m + 2(h / (sqrt(2α + α)). 2 )));

[0013] Where a is the length of the pipeline that needs to be relocated, m is the width of the installation position of the steel ring, h is the net distance between the pipeline and the tunnel segment after the relocation, and α is the tensile strength per unit length of the cable.

[0014] Optionally, the step of calculating the number of fixed points to be cut, based on the length of the pipeline to be re-arranged as needed, includes:

[0015] Obtain the distance between the two adjacent fixed points;

[0016] The calculation yields n = a / d, where n is rounded up to obtain the number of fixed points that need to be cut. n is the theoretical number of fixed points that need to be cut, and d is the distance between two adjacent fixed points.

[0017] Optionally, the number of the fixing points that need to be cut is evenly distributed on both sides of the center line on the width of the steel ring installation position.

[0018] Optionally, in the step of cutting the fixed point and relocating the pipeline, the net distance between the relocated pipeline and the tunnel segment shall not be less than 15cm.

[0019] Optionally, in the step of cutting the fixed point and rearranging the pipeline, the stacking height of the pipeline layers shall not exceed 70cm.

[0020] Optionally, prior to the step of determining the information of the pipelines that need to be rerouted, the following may also be included: technical preparation, personnel allocation, construction equipment allocation, and construction material allocation.

[0021] Optionally, after the step of rerouting the pipeline, the method further includes:

[0022] Positioning and fixing of the steel ring plate;

[0023] Grouting and filling of the gap behind the wall;

[0024] The pipeline was restored to its original state.

[0025] In the technical solution provided by this invention, before relocating the pipeline, the type of cable to be relocated, the tensile strength per unit length of the cable, the required net distance between the relocated pipeline and the tunnel segments, and the width of the steel ring installation position are obtained. Based on the obtained information about the pipeline to be relocated and the width of the steel ring installation position, the length of the pipeline to be relocated is calculated. Since the pipeline to be relocated is fixed to the inner wall of the tunnel by fixing points, the fixing points used to fix the pipeline also need to be cut during the pipeline relocation process. Based on the calculated length of the pipeline to be relocated, the number of fixing points to be cut is calculated. Cutting the calculated fixing points and relocating the pipeline can effectively improve construction efficiency and reduce the consumption of manpower and material resources during construction. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0027] Figure 1 This is a flowchart illustrating an embodiment of a method for relocating pipelines in the early stages of a subway tunnel, provided by the present invention.

[0028] Figure 2 for Figure 1 A schematic diagram of the redesign scheme in an embodiment;

[0029] Figure 3 This is a schematic diagram of another embodiment of the pipeline relocation method for the early stage of a subway tunnel provided by the present invention.

[0030] Figure 4 for Figure 3 The schematic diagram shows the installation position of the steel ring plate and the pipeline layout in an embodiment.

[0031] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0033] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0034] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0035] Currently, the commonly used methods for relocating pipelines in subway tunnels have significant problems.

[0036] To address the aforementioned problems, this invention provides a method for relocating pipelines in the early stages of subway tunnel construction. Figures 1 to 4 This is a specific embodiment of the method for relocating pipelines in the early stages of subway tunnels provided by the present invention.

[0037] Please see Figures 1 to 2 , Figure 1 This is a flowchart illustrating an embodiment of a method for relocating pipelines in the early stages of a subway tunnel, provided by the present invention. The method includes the following steps:

[0038] Step S100: Obtain information on the pipeline that needs to be relocated and the width of the steel ring installation position. The pipeline information includes the type of cable, the tensile strength per unit length of the cable, and the net distance between the relocated pipeline and the tunnel segment.

[0039] Step S200: Calculate the length of the pipeline to be relocated based on the information of the pipeline to be relocated and the width of the steel ring installation position.

[0040] Step S300: Calculate the number of fixed points that need to be cut based on the length of the pipeline to be re-arranged.

[0041] Step S400: Cut the fixed point and reposition the pipeline.

[0042] Before carrying out pipeline relocation work, the information of the pipeline to be relocated and the width of the steel ring installation position are first obtained. Based on the obtained information of the pipeline to be relocated and the width of the steel ring installation position, the length of the pipeline to be relocated is calculated. In subway tunnels, pipelines are generally fixed to the inner wall of the tunnel by fixed points. Before carrying out the pipeline relocation work, it is also necessary to calculate the number of fixed points to be cut based on the calculated length of the pipeline to be relocated. The fixed points of the pipeline are cut according to the calculation results, and then the pipeline is relocated.

[0043] Furthermore, the pipeline information includes the cable type, the cable stretchability per unit length, and the net distance between the pipeline and the tunnel segment after the pipeline relocation. Referring to the table below, the cable stretchability per unit length can be obtained by referring to the cable type.

[0044] serial number Cable type Stretchability per unit length (meters) 1 High-voltage cables 0.05 2 low voltage cables 0.05 3 Lighting circuit cables 0.08 4 optical fiber 0.08

[0045] Table 1 is a table of pipeline information in a method for relocating pipelines in the early stage of a subway tunnel provided by the present invention.

[0046] Furthermore, in this embodiment of the invention, step S200 further includes the following steps:

[0047] Step S201, calculate and obtain a = m + 2(h / (sqrt(2α + α)). 2 )));

[0048] Reference Figure 2 In one embodiment of the present invention, 'a' represents the length of the pipeline to be repositioned, 'm' represents the width of the installation location, 'h' represents the net distance between the repositioned pipeline and the tunnel segment, and 'α' represents the tensile strength per unit length of the cable. Since the number of steel ring plates is too small, only one steel ring plate needs to be installed. The width of the installation location of the steel ring plate can be considered as 0, meaning the width 'm' of the installation location is not included in the calculation. The length of the pipeline to be repositioned, 'a', is calculated as 2(h / (sqrt(2α+α)). 2 ))).

[0049] Reference Figures 3 to 4 In another embodiment of the present invention, 'a' represents the length of the pipeline to be repositioned, 'm' represents the width of the installation location, 'h' represents the net distance between the repositioned pipeline and the tunnel segment, and 'α' represents the tensile strength per unit length of the cable. Since there are a large number of steel rings, i.e., multiple steel rings need to be installed, the width of the installation location of the steel ring cannot be considered zero; that is, the width 'm' of the installation location of the steel ring needs to be included in the calculation. Therefore, the length of the pipeline to be repositioned, a = m + 2(h / (sqrt(2α + α)), is calculated as follows: 2 ))).

[0050] Furthermore, in this embodiment of the invention, step S300 further includes the following steps:

[0051] Step S301: Obtain the distance between the two adjacent fixed points;

[0052] Step S302: Calculate n = a / d, round n up to obtain the number of fixed points that need to be cut, where n is the theoretical number of fixed points that need to be cut, and d is the distance between two adjacent fixed points.

[0053] Since the pipeline is generally fixed to the inner wall of the subway tunnel through multiple fixed points, before the pipeline is rerouted, it is necessary to cut the fixed points used to fix the pipeline. The distance between two adjacent fixed points is fixed. That is, the theoretical number of fixed points to be cut is calculated by the length of the pipeline to be rerouted and the distance between the two adjacent fixed points. In order to ensure that the length of the corresponding cable being stretched does not exceed the preset threshold, thereby causing the cable to deform or break, and the number of fixed points to be cut must be an integer, the n obtained by calculation needs to be rounded up.

[0054] Furthermore, the number of the fixing points that need to be cut is evenly distributed on both sides of the center line on the width of the steel ring installation position.

[0055] To ensure that the elongation of the stretched cable is uniform within the stretching area, and that the length of the cable stretched at each point does not exceed a preset threshold, thereby preventing deformation or breakage, the number of fixing points cut on both sides of the center line on the width of the steel ring installation position should be as similar as possible.

[0056] Furthermore, during the relocation of the pipeline, the static distance between the relocated pipeline and the tunnel segment shall not be less than 15cm.

[0057] After the pipeline relocation is completed, steel ring plates need to be installed in the relocated area. The static distance between the relocated pipeline and the tunnel segment should not be less than 15cm, following the minimum limit to ensure the minimum construction space required for the installation of the steel ring plates.

[0058] Furthermore, during the relocation of the pipelines, the stacking height of the pipelines in layers shall not exceed 70cm.

[0059] During the relocation of the pipelines, construction must be carried out in strict accordance with boundary requirements to ensure the normal operation of the subway line.

[0060] Before step S100, there is also step S001, which includes technical preparation, personnel allocation, construction machinery and equipment allocation, and construction material allocation.

[0061] The process includes step S002 after step S400: positioning and fixing the steel ring, grouting and filling the gap behind the wall, and restoring the pipeline to its original state.

[0062] In this embodiment, before relocating the pipeline, the length of the pipeline to be relocated is calculated using the Pythagorean theorem, based on the information of the pipeline to be relocated and the required net distance between the relocated pipeline and the tunnel segments. During the calculation, the actual number of steel ring segments installed on the construction site is considered, along with whether the width of the installation position of the steel ring segments needs to be included in the calculation. The number of fixing points that need to be cut is then calculated based on the distance between two adjacent fixing points. Finally, the fixing points are cut according to the calculated number of fixing points, and the pipeline is relocated. This method is simple and reliable. Calculating the actual workload before construction begins allows for thorough preparation and planning, improving on-site construction efficiency and reducing waste of manpower and resources.

[0063] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made under the concept of the present invention using the contents of the present invention specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A method for relocating pipelines in the early stages of subway tunnel construction, characterized in that, include: Obtain information on the pipelines that need to be relocated and the width of the steel ring installation location. The pipeline information includes the type of cable, the tensile strength per unit length of the cable, and the net distance between the relocated pipeline and the tunnel segment. Based on the information of the pipeline to be relocated and the width of the steel ring installation position, calculate the length of the pipeline to be relocated; Calculate the number of fixed points that need to be cut based on the length of the pipeline to be re-arranged as required; Cut the fixed point and reroute the pipeline; The step of calculating the length of the pipeline to be relocated, based on the information of the pipeline to be relocated and the width of the steel ring installation position, includes: Calculate and obtain a = m + 2(h / (sqrt(2α + α)). 2 ))); Where a is the length of the pipeline that needs to be relocated, m is the width of the installation position of the steel ring, h is the net distance between the pipeline and the tunnel segment after relocation, and α is the tensile strength per unit length of the cable. The step of calculating the number of fixed points that need to be cut, based on the required length of the pipeline, includes: Obtain the distance between two adjacent fixed points; The calculation yields n = a / d, and n is rounded up to obtain the number of fixed points that need to be cut. n is the theoretical number of fixed points that need to be cut, and d is the distance between two adjacent fixed points. The number of the fixing points that need to be cut is evenly distributed on both sides of the center line on the width of the steel ring installation position.

2. The method for relocating pipelines in the early stages of subway tunnel construction as described in claim 1, characterized in that, The types of pipelines include high-voltage cables, low-voltage cables, lighting circuit cables, and optical fibers.

3. The method for relocating pipelines in the early stages of subway tunnel construction as described in claim 1, characterized in that, In the step of cutting the fixed point and relocating the pipeline, the net distance between the relocated pipeline and the tunnel segment shall not be less than 15cm.

4. The method for relocating pipelines in the early stages of subway tunnel construction as described in claim 1, characterized in that, In the step of cutting the fixed point and rearranging the pipeline, the stacking height of the pipeline layers shall not exceed 70cm.

5. The method for relocating pipelines in the early stages of subway tunnel construction as described in claim 1, characterized in that, Before obtaining information on the pipelines that need to be relocated and the location of the steel rings, the process also includes: technical preparation, personnel allocation, construction equipment allocation, and construction material allocation.

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