A parametric intelligent design method for flat-bottom circular water conveyance tunnel

Abstract

The present invention discloses a parametric intelligent design method for a flat-bottomed circular water conveyance tunnel, comprising the following steps: formulating a standard hole diameter support parameter table for a flat-bottomed circular water conveyance tunnel; generating a design section support parameter table by comparison according to the hole diameter after lining of the water conveyance tunnel; inputting basic parameters for design without comparing the standard hole diameter in the design section support parameter table; inputting steel lining section parameters contained in various types of surrounding rocks in the design section support parameter table; automatically calculating and generating the engineering quantity, typical section diagram, and report text of the water conveyance tunnel by one key. The present invention has the advantages of high intelligence, high quality, fast progress, and avoiding duplication of work.

Description

Technical Field

[0001] The invention relates to the technical field of intelligent design of water conveyance tunnels in water conservancy and hydropower engineering, and in particular to a parametric intelligent design method for a flat-bottomed circular water conveyance tunnel. Background Art

[0002] As the main technical means to optimize water resource allocation, water diversion and regulation projects are one of the important construction contents of national water network projects. Inter-basin water diversion projects are also called water diversion projects, which often need to cross mountains to convey water. The structural type of water transmission lines is basically tunnels. The main construction methods of water transmission tunnels are drilling and blasting and TBM.

[0003] The structural types of water conveyance tunnels that can be used by the drill and blast method include circular, horseshoe, and city gate tunnels. Among them, circular tunnels have good stress conditions but are inconvenient for construction and maintenance, while city gate tunnels are convenient for construction and maintenance but have poor stress conditions. The stress and operation and maintenance conditions of horseshoe tunnels are between these two tunnel types. In recent years, long-distance pressurized water conveyance projects have innovated on the basis of the above sections and adopted a flat-bottomed circular structure, which has the advantages of still having good stress conditions and taking into account the requirements of convenient construction and maintenance.

[0004] The main tasks of water diversion tunnel design include tunnel scale planning, typical cross-section structure design of various surrounding rocks, engineering quantity calculation, drawing and report writing, etc. Except for the typical cross-section structure design which requires rich experience, most of them are routine work that is laborious and time-consuming. Using existing engineering experience to improve quality and efficiency, and realizing standardized intelligent design of flat-bottomed circular water diversion tunnels and automatic update with one-click modification are the actual needs for the high-quality development of water diversion and regulation projects. Summary of the invention

[0005] In order to improve the quality and efficiency of flat-bottom circular tunnel design and realize standardized intelligent design and one-key modification and automatic update, the present invention provides a parametric intelligent design method for flat-bottom circular water conveyance tunnel. According to the pre-defined flat-bottom circular tunnel standard hole diameter support parameter table, after the hole diameter after tunnel lining is input, the typical cross-section structural design parameters of various surrounding rocks are automatically generated by comparison. Combined with the total length of the water conveyance tunnel, the concrete grade and the proportion of various surrounding rocks provided by the geology, the typical cross-section engineering quantities of various surrounding rocks and the summarized engineering quantities can be automatically calculated. In conjunction with software development, the method can automatically draw and generate the tunnel structure design report text.

[0006] The technical solution adopted by the present invention to achieve its purpose is:

[0007] A parametric intelligent design method for a flat-bottom circular water conveyance tunnel comprises the following steps:

[0008] S1. Formulate a standard tunnel diameter support parameter table for flat-bottomed circular water diversion tunnels;

[0009] In the parametric design of the flat-bottomed circular water diversion tunnel, the surrounding rock is divided into Class I, Class II, Class III, Class IV, and Class V according to the specifications for support design. The most important parameter is the tunnel diameter after lining, that is, the inner diameter of the water-passing section. Starting from the tunnel diameter after lining of 2.0m, it is divided into grades with a difference of 0.5m. Based on the experience of similar projects, after setting the bottom width B after lining, the spraying thickness δ, lining thickness t, anchor support parameters, advance support parameters, steel arch parameters and consolidation grouting parameters are formulated according to the surrounding rock category to form a standard tunnel diameter support parameter table.

[0010] S2. Compare and generate the design section support parameter table according to the diameter of the water conveyance tunnel after lining;

[0011] The diameter of the flat-bottomed circular water diversion tunnel after lining is calculated and determined according to the flow requirements, and the construction requirement of not less than 2.0m is taken into consideration. According to the principle of being closest to the design input diameter after lining, it is compared with the standard diameter support parameter table, and the support parameters of the closest standard diameter Class I, Class II, Class III, Class IV, and Class V surrounding rock sections are imported to generate the design section support parameter table. If the relevant parameters need to be adjusted, they can still be manually modified in the design section support parameter table.

[0012] S3. Input the basic parameters for design without comparing with the standard hole diameter in the design section support parameter table;

[0013] The basic parameters are directly input into the design section support parameter table, and the basic parameters include the total length of the water conveyance tunnel, the grade of shotcrete or backfill concrete, the grade of lining, and the spacing of expansion joints.

[0014] S4. Input the steel lining parameters contained in each type of surrounding rock in the design section support parameter table;

[0015] When the water conveyance tunnel contains a shallow buried steel lining section, the steel lining inner diameter, steel lining wall thickness, stiffening ring height, and steel lining section length in various types of surrounding rock are further input in the design section support parameter table. When the length of the steel lining section in the surrounding rock of Class I to Class V is "0", it means that there is no steel lining section, and the three parameters of steel lining inner diameter, steel lining wall thickness, and stiffening ring height do not need to be input at this time; when the stiffening ring height is "0", it means that the steel lining adopts a smooth pipe and no stiffening ring is set.

[0016] S5, automatically calculate and generate the water diversion tunnel engineering quantity with one click;

[0017] In S2, S3, and S4, the support parameters, basic parameters, and steel lining parameters of the designed section have been entered. Click OK to automatically calculate and generate the engineering quantities and total engineering quantities of the flat-bottomed circular water diversion tunnel of Class I to Class V surrounding rock corresponding to the designed hole diameter after lining with one click; the automatic calculation rules are as follows: the outsourcing value is taken according to the type of engineering quantity item in each type of surrounding rock, and the item types in each type of surrounding rock are the same and the order is consistent, which is convenient for superimposed calculation of engineering quantities; the sprayed concrete, backfill concrete, and lining concrete grades in the project display characteristic values ​​according to the input basic parameters; backfill concrete, contact grouting, cut-off grouting, and Q345R steel pipe are not displayed when there is no steel lining section; the anchor model and length, and the steel arch model are dynamically adjusted according to the typical section parameters.

[0018] S6, Generate typical cross-section diagram synchronously with one key;

[0019] In S2, S3, and S4, the support parameters, basic parameters, and steel lining parameters of the designed section have been entered. Click OK to simultaneously generate the typical cross-sectional diagram of the flat-bottomed circular water diversion tunnel of Class I to Class V surrounding rock, the typical cross-sectional diagram of the steel lining section, and the consolidation grouting cross-sectional diagram corresponding to the hole diameter after lining of the designed section.

[0020] S7. Generate report text synchronously with one click.

[0021] In S2, S3, and S4, the support parameters, basic parameters, and steel lining parameters of the design section have been entered, and modular report texts are pre-built in. Click OK to embed various support parameters of Class I, Class II, Class III, Class IV, and Class V surrounding rock of the design section of the water diversion tunnel, and you can generate the design report text synchronously with one click.

[0022] The order of steps S2, S3, and S4 can also be adjusted; steps S5, S6, and S7 can be synchronized with one key or implemented step by step as needed.

[0023] The beneficial effects of the present invention are:

[0024] 1. High degree of intelligence. Even designers who have never been engaged in water diversion and regulation engineering design can easily carry out cross-sectional design, engineering quantity calculation, drawing and report text writing of flat-bottomed circular water diversion tunnels by using this parametric intelligent design method.

[0025] 2. High quality and fast progress. It is conducive to improving the quality of results. The only parameters that need to be input are the diameter of the hole after lining, basic parameters and steel lining section parameters. The support parameters of the design section that really requires experience have been realized through intelligent comparison, saving the time of design, verification and review, and shortening the work of several weeks to a few minutes.

[0026] 3. Avoid duplication of work. The time-consuming pre-design work also lies in frequent modifications, especially the change of the hole diameter after lining of the design section of the water conveyance tunnel, which will lead to frequent changes in the support parameters and steel lining section parameters, while the basic parameters are not greatly modified. Through the design method of the present invention, the support parameters can be updated with one click, shortening the modification work that takes several days to be completed in a few seconds, further improving quality and efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a flow chart of an embodiment of the present invention;

[0028] Figure 2 It is a schematic diagram of parameter definition of a flat-bottomed circular water diversion tunnel according to an embodiment of the present invention. DETAILED DESCRIPTION

[0029] The technical solution of the present invention is described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] The present invention provides a parameterized intelligent design method for a flat-bottomed circular water conveyance tunnel. Figure 1 As shown, the method comprises the following steps:

[0031] S1. Formulate a standard tunnel diameter support parameter table for flat-bottomed circular water diversion tunnels;

[0032] When designing the flat-bottom circular water diversion tunnel by parametric intelligent design, the cross-section parameters are defined as follows: Figure 2 As shown. According to the Technical Specification for Anchor Shotcrete (GB50086-2015), the surrounding rock is supported and designed according to Class I, Class II, Class III, Class IV, and Class V, among which the most important parameter is the diameter of the tunnel after lining, that is, the inner diameter of the water-passing section. Starting from the diameter of the tunnel after lining of 2.0m, it is divided into grades with a difference of 0.5m. Based on the experience of similar projects, after setting the bottom width B after lining, the spraying thickness δ, lining thickness t, anchor support parameters, advance support parameters, steel arch parameters, and consolidation grouting parameters are formulated according to the surrounding rock type to form a standard tunnel diameter support parameter table. Taking the tunnel diameter of 4.5m after lining as an example, the standard tunnel diameter support parameters for Class I, Class II, Class III, Class IV, and Class V surrounding rocks are shown in Table 1.

[0033]

[0034] S2. Compare and generate the design section support parameter table according to the diameter of the water conveyance tunnel after lining;

[0035] The diameter of the flat-bottomed circular water diversion tunnel after lining is calculated and determined according to the flow requirements, and the construction requirements are not less than 2.0m. According to the principle of being closest to the design input diameter after lining, it is compared with the standard diameter support parameter table, and the support parameters of the closest standard diameter Class I, Class II, Class III, Class IV, and Class V surrounding rock sections are imported to generate the design section support parameter table. If the relevant parameters need to be adjusted, they can still be manually modified in the design section support parameter table. The cells that do not need to enter the support parameters are expressed with " / ". The design section support parameter table is shown in Table 2.

[0036]

[0037] S3. Input the basic parameters for design without comparing with the standard hole diameter in the design section support parameter table;

[0038] Parameters that do not need to be compared with the standard hole diameter for design are directly entered as basic parameters in the design section support parameter table in Table 2, such as the total length of the water diversion tunnel, the sprayed concrete or backfill concrete grade, and the lining grade. The expansion joint spacing is generally 6~12m, and is entered as 9.1m by default, making full use of the standard steel bar length after deducting the protective layer thickness. The basic parameter input is shown in the first and second rows of Table 2 and the row where the "Expansion Joint Spacing FJ (m)" is located.

[0039] S4. Input the steel lining parameters contained in each type of surrounding rock in the design section support parameter table;

[0040] When the water conveyance tunnel contains a shallow buried steel lining section, the steel lining section parameters such as the steel lining inner diameter, steel lining wall thickness, stiffening ring height, and steel lining section length in various types of surrounding rock are further input in the design section support parameter table in Table 2. When the length of the steel lining section in the surrounding rock of Class I to Class V is "0", it means that there is no steel lining section. At this time, it is not necessary to input the three parameters of steel lining inner diameter, steel lining wall thickness, and stiffening ring height. When the stiffening ring height is "0", it means that the steel lining adopts a smooth pipe and no stiffening ring is set. For details of the steel lining section parameters, please refer to the row of "Steel Lining Section Parameters" in Table 2. Considering the convenience of construction, the excavation and primary support parameters of the concrete lining section and steel lining section of the water conveyance tunnel of the same surrounding rock category are the same.

[0041] S5, automatically calculate and generate the water diversion tunnel engineering quantity with one click;

[0042] In order to facilitate design and calculation, the following four simplified regulations are made for various surrounding rock lining sections of flat-bottomed circular water diversion tunnels:

[0043] 1. The end point of the bottom width after lining is tangent to the arc after lining, and the end point of the bottom width of excavation is tangent to the arc of excavation, that is, the length of the inner tangent line after lining is T=0.5×B, and the length of the outer tangent line of excavation is T0=0.5×B0;

[0044] 2. Excavation bottom width B0 = bottom width after lining B + 2 times of shotcrete thickness + 2 times of lining thickness. Considering design habits, shotcrete thickness and lining thickness are expressed in cm and need to be divided by 100 to convert to m during calculation;

[0045] 3. The base plate thickness h is by default equal to the sum of the spraying thickness δ and the lining thickness t;

[0046] 4. Considering the convenience of construction excavation and lining formwork, and taking into account investment savings, the excavation diameter of the water diversion tunnel in Class I and Class II surrounding rock sections is the same as the diameter after lining, and the excavation diameter of the water diversion tunnel in Class III, Class IV, and Class V surrounding rock sections is the same as the diameter after lining.

[0047] In S2, S3, and S4, the support parameters, basic parameters, and steel lining parameters of the design section have been entered. According to the simplified regulations, click OK to automatically calculate and generate the engineering quantities and total engineering quantities of the flat-bottomed circular water diversion tunnel of Class I to Class V surrounding rocks corresponding to the designed hole diameter after lining. The design defaults to taking the outsourcing value of the engineering quantity item type in each type of surrounding rock. The project types in each type of surrounding rock are the same and the order is consistent, which is convenient for superimposing and calculating the engineering quantity. In the project, the sprayed concrete, backfill concrete, and lining concrete grades display characteristic values ​​according to the input basic parameters; backfill concrete, contact grouting, cut-off grouting, and Q345R steel pipes are not displayed when there is no steel lining section; the anchor model and length, and the steel arch model are dynamically adjusted according to the typical section parameters. Taking the engineering quantity of the water diversion tunnel of Class V surrounding rock as an example, the default built-in engineering quantity calculation method of the design is shown in Table 3.

[0048]

[0049] S6, Generate typical cross-section diagram synchronously with one key;

[0050] In S2, S3, and S4, the support parameters, basic parameters, and steel lining section parameters of the designed section have been entered. Click OK to simultaneously generate the typical cross-section diagram of the flat-bottomed circular water diversion tunnel of Class I to Class V surrounding rock, the typical cross-section diagram of the steel lining section, and the consolidation grouting cross-section diagram corresponding to the designed hole diameter after lining.

[0051] S7. Generate report text synchronously with one click.

[0052] In S2, S3, and S4, the support parameters, basic parameters, and steel lining parameters of the design section have been entered, and a modular report text is pre-built in. Click OK to embed the support parameters of the Class I, Class II, Class III, Class IV, and Class V surrounding rock sections of the water diversion tunnel, and you can generate the design report text with one click. Taking Class V surrounding rock as an example, the overall structure of the water diversion tunnel and the detailed description report text of the Class V surrounding rock section are shown in Table 4:

[0053]

[0054] The steps S2, S3, and S4 can be adjusted in sequence; the steps S5, S6, and S7 can be synchronized with one key or implemented step by step as needed.

[0055] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a technician familiar with the technical field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A parametric intelligent design method for a flat-bottomed circular water diversion tunnel, characterized in that: It includes the following steps: S1. Formulate a standard tunnel diameter support parameter table for flat-bottomed circular water diversion tunnels; S2. Compare and generate the design section support parameter table according to the diameter of the water conveyance tunnel after lining; S3. Input the basic parameters for design without comparing with the standard hole diameter in the design section support parameter table; S4. Input the steel lining parameters contained in each type of surrounding rock in the design section support parameter table; S5, automatically calculate and generate the water diversion tunnel engineering quantity with one click; S6, Generate typical cross-section diagram synchronously with one key; S7, one-click synchronous generation of report text; In step S1, the formulation process of the standard tunnel diameter support parameter table is specifically as follows: the surrounding rock is divided into Class I, Class II, Class III, Class IV, and Class V for support design respectively, wherein the most important parameter is the tunnel diameter after lining, i.e., the inner diameter of the water-passing section; starting from the tunnel diameter after lining of 2.0m, the tunnel is divided into grades with a difference of 0.5m, and after setting the bottom width B after lining, the spraying thickness δ, lining thickness t, anchor support parameters, advance support parameters, steel arch parameters, and consolidation grouting parameters are formulated according to the surrounding rock type to form a standard tunnel diameter support parameter table; In step S2, the comparison and generation of the design section support parameter table is specifically as follows: according to the principle of being closest to the post-lining tunnel diameter input by the design, the support parameters of the closest standard tunnel diameter Class I, Class II, Class III, Class IV, and Class V surrounding rock sections are compared with the standard tunnel diameter support parameter table, and the design section support parameter table is generated. If the relevant parameters need to be adjusted, they are still manually modified in the design section support parameter table; In step S5, the water conveyance tunnel engineering quantity includes the engineering quantity of Class I to Class V surrounding rocks of the flat-bottomed circular water conveyance tunnel corresponding to the designed post-lining tunnel diameter and the total engineering quantity; the automatic calculation rule is: the outsourcing value is taken according to the type of engineering quantity item in each type of surrounding rock, and the item types in each type of surrounding rock are the same and the order is consistent, so as to facilitate the superposition calculation of engineering quantity; the sprayed concrete, backfill concrete and lining concrete grades in the project display characteristic values ​​according to the input basic parameters; backfill concrete, contact grouting, cut-off grouting, and Q345R steel pipe are not displayed when there is no steel lining section; the anchor rod model and length, and the steel arch frame model are dynamically adjusted according to the typical section parameters.

2. The parameterized intelligent design method for a flat-bottomed circular water conveyance tunnel according to claim 1 is characterized in that: In step S3, the basic parameters include the total length of the water conveyance tunnel, the grade of shotcrete or backfill concrete, the grade of lining, and the spacing of expansion joints.

3. The parametric intelligent design method for a flat-bottomed circular water conveyance tunnel according to claim 1 is characterized in that: In step S4, the steel lining segment parameters include the steel lining inner diameter, steel lining wall thickness, stiffening ring height and the steel lining segment length in various types of surrounding rock. When the steel lining segment lengths in Class I to Class V surrounding rock are all "0", it means that no steel lining segment is provided, and at this time, the three parameters of steel lining inner diameter, steel lining wall thickness and stiffening ring height do not need to be input. When the stiffening ring height is "0", it means that the steel lining adopts a smooth pipe and no stiffening ring is provided.

4. The parametric intelligent design method for a flat-bottomed circular water conveyance tunnel according to claim 1 is characterized in that: In step S5, the water diversion tunnel engineering quantity is simplified by the following four provisions for the convenience of design and calculation: The end point of the bottom width after lining is tangent to the arc after lining, and the end point of the bottom width of excavation is tangent to the arc of excavation, that is, the length of the inner tangent line after lining is T=0.5×B, and the length of the outer tangent line of excavation is T0=0.5×B0; Excavation bottom width B0 = bottom width after lining B + 2 times of shotcrete thickness + 2 times of lining thickness; The base plate thickness h is by default equal to the sum of the spraying thickness δ and the lining thickness t; The excavation diameter and the diameter after lining of the water diversion tunnel in the surrounding rock sections of Class I and Class II are the same; the excavation diameter and the diameter after lining of the water diversion tunnel in the surrounding rock sections of Class III, Class IV and Class V are the same.

5. The parameterized intelligent design method for a flat-bottomed circular water conveyance tunnel according to claim 1 is characterized in that: In step S6, the typical cross-section diagrams include the typical cross-section diagrams of Class I to Class V surrounding rocks of the flat-bottomed circular water conveyance tunnel corresponding to the designed post-lining tunnel diameter, the typical cross-section diagram of the steel lining section, and the consolidation grouting cross-section diagram.

6. The parametric intelligent design method for a flat-bottomed circular water conveyance tunnel according to claim 1 is characterized in that: In step S7, the one-click synchronous generation of the report text is specifically: a modular report text is pre-built in, click OK, and various support parameters of Class I, Class II, Class III, Class IV, and Class V surrounding rock sections of the water diversion tunnel are embedded, and the design report text can be generated synchronously with one click.

7. The parameterized intelligent design method for a flat-bottomed circular water conveyance tunnel according to claim 1 is characterized by: The order of steps S2, S3 and S4 is adjustable; steps S5, S6 and S7 can be implemented synchronously with one key, or in steps as needed.

Images