Three-dimensional forward design method for pumped storage power station auxiliary cavern group

Abstract

The application discloses a kind of three-dimensional positive design method for pumped storage power station accessory cavern group, belong to the technical field of water conservancy and hydropower engineering structure design and manufacture.It provides a kind of three-dimensional positive design method that can effectively solve the design difficulty of underground accessory cavern group, improve design quality and design speed.The three-dimensional positive design method includes the following steps, first generate three-dimensional geological model and contour line on design software, then import field survey data to generate three-dimensional geological model containing terrain, then based on this, successively carry out hole axis plane line design, generate three-dimensional hole axis, generate three-dimensional underground cavern group, draw points on axis, calculate cavern spacing, output the distance matrix of each cavern, calculate the minimum distance between each axis, and finally judge whether the distance meets the requirements.Further, the problem of effectively solving the design difficulty of underground accessory cavern group is solved, and the purpose of improving design quality is achieved.

Description

Technical Field

[0001] This invention relates to a three-dimensional forward design method, and more particularly to a three-dimensional forward design method for auxiliary cavern groups of pumped storage power stations, belonging to the field of structural design and manufacturing technology of water conservancy and hydropower engineering. Background Technology

[0002] The construction of pumped storage power stations has seen explosive growth. During the construction of pumped storage power station power generation systems, underground powerhouses are widely adopted. These underground powerhouses are often equipped with ventilation and smoke extraction tunnels, drainage corridors, cable outlet tunnels, access tunnels, and ventilation and safety tunnels, leading to a rapid increase in the design volume of underground cavern complexes.

[0003] Traditional 2D design methods, primarily based on CAD, involve relatively large manual calculations, numerous intersections and collisions within cavern groups, and cannot quickly output parameters such as quantities and construction control coordinates. For underground cavern groups, traditional axis-based design methods cannot quickly determine the minimum spatial distance between tunnels, a crucial indicator in the design process. This is especially true for hybrid pumped-storage power stations, where existing traditional hydroelectric power stations already contain numerous underground caverns. The construction of hybrid pumped-storage power stations will further increase the number of auxiliary caverns within the limited space of the mountain, making the issue of cavern spacing control even more prominent.

[0004] Traditional design methods cannot quickly improve the design speed and quality of auxiliary caverns in pumped storage power stations. Currently, the three-dimensional design of auxiliary caverns in pumped storage power stations is mostly "modeling design" or "accompanying design", lacking substantial three-dimensional forward design methods, which cannot meet the progress and management requirements of pumped storage power station construction. Summary of the Invention

[0005] The technical problem to be solved by this invention is to provide a three-dimensional forward design method for underground auxiliary cavern groups that can effectively solve the design difficulties, improve design quality and speed.

[0006] The technical solution adopted to solve the above-mentioned technical problems is: a three-dimensional forward design method for auxiliary cavern groups of pumped storage power stations, the three-dimensional forward design method including the following steps,

[0007] Step S1: Generate a three-dimensional geological model and contour lines. Process the field survey data of terrain and geology, import it into the three-dimensional design platform to generate a three-dimensional geological model containing the terrain, and use the terrain data to generate three-dimensional contour lines in the three-dimensional platform.

[0008] Step S2: Design the plane route of the tunnel axis, initially determine the starting point of the auxiliary tunnel axis, and determine the plane route of the tunnel axis in the three-dimensional platform based on the topographic and geological conditions and other boundary conditions of the project, and determine the starting point of the slope on the plane tunnel axis.

[0009] Step S3: Generate a three-dimensional tunnel axis. Use the tunnel axis planar line made in step S2 as the input element of the three-dimensional axis design template with elevation and elevation information to quickly generate a three-dimensional tunnel axis with spatial elevation. Then, using the three-dimensional tunnel axis as the input element, import the auxiliary tunnel concrete structure template, adjust the parameter values ​​of the three-dimensional axis design template and the auxiliary tunnel concrete structure template, and obtain the preliminary design result of a single three-dimensional tunnel that meets the design requirements.

[0010] Step S4: Generate a three-dimensional underground cavern group. Repeat steps S2-S3 to obtain multiple auxiliary cavern axes and concrete structures, thus generating the underground cavern group. The caverns are numbered L sequentially according to the order in which they are generated. i (i=1, 2, 3…n);

[0011] Step S5: Draw points on the axis. When i=1, select axis L1 and draw a point on axis L1 at intervals of H meters, generating point P sequentially. 11 P 12 P 13 …and obtain the point set P 1n (n=1, 2, 3…); Using the same method, when i=2, 3, 4…n, point P is generated sequentially. 11 …P 21 …and obtain the point set P in (P 11 …P 21 …P in , i=1, 2, 3...; n=1, 2, 3...);

[0012] Step S6: Calculate the spacing between caverns, and calculate the point set P sequentially. i (P 11 …P 21 …P in The distance P between points in (i=1, 2, 3…; n=1, 2, 3…) rj- P qw And subtract the distance B from the walls of the two chambers to their respective chamber axes. r and B q Finally, the distance D between the caverns is obtained. rj-qw for

[0013] D rj-qw =P rj- P qw -B r -B q

[0014] in:

[0015] r and q cannot both take the same value at the same time, that is, r ≠ q;

[0016] P rj Let j be the point on the r-th axis, where r∈L i ;

[0017] P qw Let w be the w-th point on the q-th axis, where q∈L i ;

[0018] P rj ∈P in (P 11 …P 21 …P in , i=1, 2, 3...; n=1, 2, 3...);

[0019] P qw ∈P in (P 11 …P 21 …P in , i=1, 2, 3...; n=1, 2, 3...);

[0020] B r This represents the distance from the r-th axis to the wall along the r-th axis.

[0021] B q This represents the distance from the q-th axis to the wall along the q-th axis.

[0022] P rj- P qw Let be the distance between the j-th point on the r-th axis and the w-th point on the q-th axis;

[0023] Step S7: Output the distance matrix of each chamber. Based on the calculation results of step S6, output the distance matrix from a certain axis to other chambers. For example, when r=1, q=2, j=1, 2, 3…; w=1, 2, 3…; D 12 D represents the distance matrix between the first and second caverns. 12 for:

[0024] D 12 =D 1j-2w =

[0025] in:

[0026] This represents the distance between the first point on the first chamber and the first point on the second chamber;

[0027] Let w represent the distance between the j-th point in the first cavern and the w-th point in the second cavern.

[0028] Output the distance matrix D between any two caverns r and q. rq Then it is:

[0029] D rq =D rj-qw = ;

[0030] Step S8: Calculate the minimum distance between each axis, and find the minimum value MinD among the distance matrices in step S8. rq And generate the minimum distance matrix min D between the auxiliary caverns.

[0031] min D=

[0032] in:

[0033] min D 12 This indicates the minimum distance between cavern 1 and cavern 2;

[0034] min D rq This represents the minimum distance between cavern r and cavern q;

[0035] Step S9: Determine if the distance meets the requirements, and check each minimum distance from step S8. D rq The size of the minimum distance QD between caverns required or recommended in the design specifications for pumped storage power stations.

[0036] like D rq QD, then find D rq The corresponding step S8 Adjust the design axis of the r-th cavern and the design axis of the q-th cavern to adjust the position of the j-th point on the r-th cavern and the w-th point on the q-th cavern. Repeat steps S2-S9 until the design requirements are met. D rq QD;

[0037] like D rq If QD is met, the design of the auxiliary cavern axis meets the requirements, and the design process for the auxiliary cavern is now complete.

[0038] Furthermore, in step S2, after initially determining the starting point of the auxiliary cavern axis, a plane parallel to the XY plane of the default coordinate system of the three-dimensional platform is created at the initial starting point. The three-dimensional contour lines and three-dimensional geological bodies are viewed from a top-down perspective along the normal direction of this plane. Based on the topographic and geological conditions reflected by the three-dimensional contour lines and three-dimensional geological bodies, as well as other boundary conditions around the project, an initial planar route of the cavern axis without elevation information, conforming to design specifications, is drawn. The inflection points, slope initiation points, and their coordinates are then output. The specific steps are as follows:

[0039] S211, Determine the control parameters and, based on the layout principles of the auxiliary caverns, determine the elevation of the inner side of the mountain for the auxiliary caverns. Controlling slope ratio parameters Other boundary conditions;

[0040] S212, Select Exit Elevation The preliminary elevation of the mountain exit side of the cave auxiliary chamber has been selected. The elevation of the endpoint of the plane curve of the tunnel axis;

[0041] S213. Based on the location of the auxiliary cavern inside the mountain, the location of the auxiliary cavern's exit from the mountain, and the boundary conditions, draw the plane curve of the cavern axis. ;

[0042] S214, according to length and elevation difference Calculate the design slope ratio of the tunnel axis. ,

[0043] in:

[0044]

[0045] ,

[0046] S215, and To make a comparison, if Then the plane curve If the requirements are met, repeat steps S212-S214 until the slope ratio parameters are met. The required plane curve of the tunnel axis.

[0047] The preferred method of the above scheme is as follows: the design content and method of the three-dimensional hole axis template in step S3 are as follows:

[0048] S311, Determine the basic parameters of the tunnel axis. Based on the design requirements, determine the basic control parameters of the auxiliary tunnel axis, namely, the distance s1 from the starting point 1 to the starting point, the distance s2 from the starting point 2 to the starting point, ..., the distance s from the starting point m to the starting point.m Slope Slope ..., slope ratio ;

[0049] S312, Establish a planar curve. According to the design requirements, first determine the starting point and elevation of the tunnel axis. At the starting point, draw a plane PL1 parallel to the horizontal XY plane. Based on the starting point and plane PL1, draw a sketch. In this sketch, draw the planar curve of the required tunnel axis projected onto the XY plane, denoted as Cuv1. Use Cuv1 as the input element of the tunnel axis template.

[0050] S313, Determine the starting points of the slope. Take m points on the plane curve Cuv1 made in step S312 as the starting points of the tunnel axis, and denot them as Q1, Q2, ..., Q... m Its position is determined by the distances s1, s2, ..., s from the starting point and the initial point on Cuv1. m Sure;

[0051] S314, divide the plane curve Cuv1, based on Q1, Q2, ..., Q... m Divide Cuv1 into m+1 segments, and label them Duv1, Duv2, Duv3, ..., Duv1 from the starting point. m+1 To assign elevation information to the plane curve, vertically stretch the plane curve Cuv1 created in S312 into a surface, denoted as PL2. Select Duv1, and based on the surface PL2, assign the offset height H1 of the starting and ending points of Duv1. This will yield a spatial curve with the same contour as the plane curve Cuv1, but with corresponding elevation information. ,

[0052] Offset height of the i-th segment termination point The formula is:

[0053]

[0054] in:

[0055] Slope;

[0056] Let be the length of the i-th space curve segment;

[0057] The offset height of the end point of the (i-1)th segment.

[0058] Repeat step S314 above and give the following results respectively. , … The starting and ending points are offset by height, and a space curve is generated. , … , The starting point offset height is The height offset of the endpoint;

[0059] S315, Generate the hole axis, which is generated in step S314. , , … By combining them into a single tunnel axis, a tunnel axis L with elevation information is obtained;

[0060] S316, generate the tunnel axis template, encapsulate the tunnel axis S and its manufacturing process into a template and name it "tunnel axis template", and then output the elevation of the tunnel entrance point, the elevation of the exit point, the length of the tunnel axis, the station number of the starting point 1, the station number of the starting point 2, ..., the station number of the starting point m as the design results.

[0061] Furthermore, the adjustable parameters released by the three-dimensional tunnel axis template include the horizontal distance from the starting point 1 to the starting point, the horizontal distance from the starting point 2 to the starting point, ..., the horizontal distance from the starting point m to the starting point; the slope ratio of the starting section 1, the slope ratio of the starting section 2, ..., the slope ratio of the starting section m+1.

[0062] The preferred embodiment of the above scheme is as follows: In step S3, the design content and method of the concrete structure formwork for the auxiliary cavern are as follows:

[0063] S321, Generate the hole axis line. Call the hole axis line template created in step S3, adjust the corresponding parameters, generate the required hole axis line, and use it as the input element of the auxiliary cavern concrete structure template.

[0064] S322, Determine the vertical direction of the tunnel cross-section. Based on the tunnel axis inlet point, make a vertical offset point Z1 in the Z direction, and connect the inlet point and Z1 to form line L. Z The vertical direction of the cavern cross-section;

[0065] S323, Draw the interior and exterior outlines of the tunnel. Construct a vertical plane PL2 through the tunnel axis inlet point. Based on the tunnel axis inlet point and plane PL2, create a positioning diagram, ensuring that the V direction of the positioning diagram is parallel to the L direction. Z Draw the horseshoe-shaped cross-section inner contour in the figure, perform parametric processing, and output the inner contour of the cavern; the drainage ditch is arranged in three ways: left side, right side, and double side. Draw three inner contour sketches according to the arrangement of the drainage ditch. At the same time, draw the outer contour of the cavern and output it.

[0066] S324, Set the direction of the drainage ditch, create a string parameter named "Drainage Ditch Direction", and assign multiple values: left, right, and both sides; Create curve C and isolate it, and associate curve C with different cave interior contours. For example, when the parameter "Drainage Ditch Direction" = "Left", let curve C = cave interior contour B1, so as to control the cave interior contour with the parameter "Drainage Ditch Direction".

[0067] S325, Create the cavern body. Perform an envelope sweep on the curve C created in step S324 and the outer contour of the cavern. The sweep line used is the cavern axis created in step S321. The inner contour sweep body is denoted as B1 and the outer contour sweep body is denoted as B2. Use B2 as the base object and trim it with B1 to obtain horseshoe-shaped cavern bodies with different drainage ditch layout directions.

[0068] S326, Create a single-section formwork template. Encapsulate the tunnel body created in step S325, its creation process, and parameters into a template and name it "horseshoe-shaped tunnel template".

[0069] S327, Create templates for other cross-sectional tunnel forms. Repeat steps S321-S326 to create "circular tunnel templates" and "gate-shaped tunnel templates".

[0070] S328, encapsulated auxiliary cavity assembly template.

[0071] 1) Call the hole axis template created in steps S311-S316 and adjust the parameters to obtain a suitable hole axis.

[0072] 2) Call the "horseshoe-shaped tunnel template", "circular tunnel template" and "city gate-shaped tunnel template" created in steps S326 and S327 respectively.

[0073] 3) Referring to step S324, set the multi-value parameter "cross-section form" and assign it multiple values ​​such as "horseshoe", "circular", and "gateway". Link the multi-value parameter with the corresponding tunnel template to form a tunnel body whose tunnel form can be controlled by parameters.

[0074] 4) Package the tunnel body and its creation process and parameters into a template and name it "Ancillary Cavern Concrete Structure Template".

[0075] Furthermore, the adjustable parameters released for the concrete structure formwork of the ancillary cavern also include the tunnel cross-section type, which includes circular tunnels, horseshoe-shaped tunnels, and city gate-shaped tunnels.

[0076] The preferred embodiment of the above scheme is that the specific parameters of the circular tunnel include the tunnel radius and the lining thickness;

[0077] The specific parameters of the horseshoe-shaped tunnel include bottom slab width, lining thickness, tunnel radius, drainage ditch height, drainage ditch width, distance from bottom slab to tunnel axis, and drainage ditch direction.

[0078] The specific parameters of the city gate-shaped tunnel include the bottom slab width, lining thickness, crown radius, sidewall height, drainage ditch height, drainage ditch width, distance from the bottom slab to the tunnel axis, and drainage ditch direction.

[0079] Furthermore, the value of H in step S5 is determined based on the project design stage and the required model accuracy. When the required model accuracy is high, H can be a smaller value; when the required model accuracy is low, H can be a larger value to speed up the generation of points.

[0080] The beneficial effects of this invention are as follows: The technical solution provided in this application first generates a three-dimensional geological model and contour lines on the design software, then imports field survey data to generate a three-dimensional geological model containing terrain. Based on this model, the following steps are performed sequentially: tunnel axis planar route design, generation of a three-dimensional tunnel axis, generation of a three-dimensional underground cavern group, plotting points on the axis, calculating cavern spacing, outputting the distance matrix of each cavern, calculating the minimum distance between each axis, and finally determining whether the distance meets the requirements. The above-mentioned design method provided in this application can complete the three-dimensional forward design of the auxiliary cavern group of a pumped storage power station in a three-dimensional design platform and effectively solve the problem of controlling the spacing of the auxiliary cavern group. Simultaneously, this design method also provides a method for constructing a three-dimensional tunnel axis template and an auxiliary cavern concrete structure template. Using these two template components can improve the cavern design speed, avoid repetitive design, effectively solve the problem of design difficulty in underground auxiliary cavern groups, and achieve the goal of improving design quality. Attached Figure Description

[0081] Figure 1 This is a flowchart illustrating the three-dimensional forward design method for the auxiliary cavern group of a pumped storage power station according to the present invention.

[0082] Figure 2 This is a flowchart illustrating the planar alignment generation of the tunnel axis involved in the three-dimensional forward design method for pumped storage power station auxiliary tunnel groups of the present invention.

[0083] Figure 3 The three-dimensional forward design method for auxiliary cavern groups of pumped storage power stations in this invention involves a top view of the cavern axis planar alignment;

[0084] Figure 4 The present invention relates to a three-dimensional forward design method for auxiliary cavern groups of pumped storage power stations, including a three-dimensional isometric schematic diagram of the cavern axis planar alignment.

[0085] Figure 5 The present invention relates to a three-dimensional forward design method for auxiliary cavern groups of pumped storage power stations, including a three-dimensional cavern axis isometric schematic diagram.

[0086] Figure 6 The present invention relates to a three-dimensional forward design method for auxiliary cavern groups of pumped storage power stations, including a schematic diagram of the calculation principle for the three-dimensional cavern axis spacing.

[0087] Figure 7 The present invention relates to a three-dimensional forward design method for auxiliary cavern groups in pumped storage power stations, which involves three cross-sectional structural diagrams of the concrete structure template for the auxiliary caverns. Detailed Implementation

[0088] like Figures 1-7 This invention illustrates a three-dimensional forward design method for pumped storage power station ancillary cavern groups, which effectively addresses the design difficulties of underground ancillary cavern groups and improves design quality and speed. The three-dimensional forward design method includes the following steps:

[0089] Step S1: Generate a three-dimensional geological model and contour lines. Process the field survey data of terrain and geology, import it into the three-dimensional design platform to generate a three-dimensional geological model containing the terrain, and use the terrain data to generate three-dimensional contour lines in the three-dimensional platform.

[0090] Step S2: Design the plane route of the tunnel axis, initially determine the starting point of the auxiliary tunnel axis, and determine the plane route of the tunnel axis in the three-dimensional platform based on the topographic and geological conditions and other boundary conditions of the project, and determine the starting point of the slope on the plane tunnel axis.

[0091] Step S3: Generate a three-dimensional tunnel axis. Use the tunnel axis planar line made in step S2 as the input element of the three-dimensional axis design template with elevation and elevation information to quickly generate a three-dimensional tunnel axis with spatial elevation. Then, using the three-dimensional tunnel axis as the input element, import the auxiliary tunnel concrete structure template, adjust the parameter values ​​of the three-dimensional axis design template and the auxiliary tunnel concrete structure template, and obtain the preliminary design result of a single three-dimensional tunnel that meets the design requirements.

[0092] Step S4: Generate a three-dimensional underground cavern group. Repeat steps S2-S3 to obtain multiple auxiliary cavern axes and concrete structures, thus generating the underground cavern group. The caverns are numbered L sequentially according to the order in which they are generated. i (i=1, 2, 3…n);

[0093] Step S5: Draw points on the axis. When i=1, select axis L1 and draw a point on axis L1 at intervals of H meters, generating point P sequentially. 11 P 12 P 13 …and obtain the point set P 1n (n=1, 2, 3…); Using the same method, when i=2, 3, 4…n, point P is generated sequentially.11 …P 21 …and obtain the point set P in (P 11 …P 21 …P in , i=1, 2, 3...; n=1, 2, 3...);

[0094] Step S6: Calculate the spacing between caverns, and calculate the point set P sequentially. i (P 11 …P 21 …P in The distance P between points in (i=1, 2, 3…; n=1, 2, 3…) rj- P qw And subtract the distance B from the walls of the two chambers to their respective chamber axes. r and B q Finally, the distance D between the caverns is obtained. rj-qw for

[0095] D rj-qw =P rj- P qw -B r -B q

[0096] in:

[0097] r and q cannot both take the same value at the same time, that is, r ≠ q;

[0098] P rj Let j be the point on the r-th axis, where r∈L i ;

[0099] P qw Let w be the w-th point on the q-th axis, where q∈L i ;

[0100] P rj ∈P in (P 11 …P 21 …P in , i=1, 2, 3...; n=1, 2, 3...);

[0101] P qw ∈P in (P 11 …P 21 …P in , i=1, 2, 3...; n=1, 2, 3...);

[0102] B r This represents the distance from the r-th axis to the wall along the r-th axis.

[0103] B qThis represents the distance from the q-th axis to the wall along the q-th axis;

[0104] P rj- P qw Let be the distance between the j-th point on the r-th axis and the w-th point on the q-th axis;

[0105] Step S7: Output the distance matrix of each chamber. Based on the calculation results of step S6, output the distance matrix from a certain axis to other chambers. For example, when r=1, q=2, j=1, 2, 3…; w=1, 2, 3…; D 12 D represents the distance matrix between the first and second caverns. 12 for:

[0106] D 12 =D 1j-2w =

[0107] in:

[0108] This represents the distance between the first point on the first chamber and the first point on the second chamber;

[0109] Let w represent the distance between the j-th point in the first cavern and the w-th point in the second cavern.

[0110] Output the distance matrix D between any two caverns r and q. rq Then it is:

[0111] D rq =D rj-qw = ;

[0112] Step S8: Calculate the minimum distance between each axis, and find the minimum value MinD among the distance matrices in step S8. rq And generate the minimum distance matrix min D between the auxiliary caverns.

[0113] min D=

[0114] in:

[0115] min D 12 This indicates the minimum distance between cavern 1 and cavern 2;

[0116] min D rq This represents the minimum distance between cavern r and cavern q;

[0117] Step S9: Determine if the distance meets the requirements, and check each minimum distance from step S8. D rqThe size of the minimum distance QD between caverns required or recommended in the design specifications for pumped storage power stations.

[0118] like D rq QD, then find D rq The corresponding step S8 Adjust the design axis of the r-th cavern and the design axis of the q-th cavern to adjust the position of the j-th point on the r-th cavern and the w-th point on the q-th cavern. Repeat steps S2-S9 until the design requirements are met. D rq QD;

[0119] like D rq If QD is met, the design of the auxiliary cavern axis meets the requirements, and the design process for the auxiliary cavern is now complete.

[0120] Accordingly, to facilitate the acquisition of corresponding parameters in each step, simplify the calculation process, maximize design efficiency and quality, and reduce the number of times corresponding parameters need to be repeatedly adjusted, in step S2 of this application, after initially determining the starting point of the auxiliary cavern axis, a plane parallel to the XY plane of the default coordinate system of the three-dimensional platform is created at the initial starting point. The three-dimensional contour lines and three-dimensional geological bodies are viewed from a top-down perspective along the normal direction of this plane. Based on the topographic and geological conditions reflected by the three-dimensional contour lines and three-dimensional geological bodies, as well as other boundary conditions around the project, an initial plane line of the cavern axis without elevation information, conforming to design specifications, is drawn, and the inflection points, starting points, and coordinates of the plane line are output. The specific steps are as follows:

[0121] S211, Determine the control parameters and, based on the layout principles of the auxiliary caverns, determine the elevation of the inner side of the mountain for the auxiliary caverns. Controlling slope ratio parameters Other boundary conditions;

[0122] S212, Select Exit Elevation The preliminary elevation of the mountain exit side of the cave auxiliary chamber has been selected. The elevation of the endpoint of the plane curve of the tunnel axis;

[0123] S213. Based on the location of the auxiliary cavern inside the mountain, the location of the auxiliary cavern's exit from the mountain, and the boundary conditions, draw the plane curve of the cavern axis. ;

[0124] S214, according to length and elevation difference Calculate the design slope ratio of the tunnel axis. ,

[0125] in:

[0126]

[0127] ,

[0128] S215, and To make a comparison, if Then the plane curve If the requirements are met, repeat steps S212-S214 until the slope ratio parameters are met. The required plane curve of the tunnel axis.

[0129] The design content and method of the three-dimensional hole axis template in step S3 are as follows.

[0130] S311, Determine the basic parameters of the tunnel axis. Based on the design requirements, determine the basic control parameters of the auxiliary tunnel axis, namely, the distance s1 from the starting point 1 to the starting point, the distance s2 from the starting point 2 to the starting point, ..., the distance s from the starting point m to the starting point. m Slope Slope ..., slope ratio ;

[0131] S312, Establish a planar curve. According to the design requirements, first determine the starting point and elevation of the tunnel axis. At the starting point, draw a plane PL1 parallel to the horizontal XY plane. Based on the starting point and plane PL1, draw a sketch. In this sketch, draw the planar curve of the required tunnel axis projected onto the XY plane, denoted as Cuv1. Use Cuv1 as the input element of the tunnel axis template.

[0132] S313, Determine the starting points of the slope. Take m points on the plane curve Cuv1 made in step S312 as the starting points of the tunnel axis, and denot them as Q1, Q2, ..., Q... m Its position is determined by the distances s1, s2, ..., s from the starting point and the initial point on Cuv1. m Sure;

[0133] S314, divide the plane curve Cuv1, based on Q1, Q2, ..., Q... m Divide Cuv1 into m+1 segments, and label them Duv1, Duv2, Duv3, ..., Duv1 from the starting point. m+1To assign elevation information to the plane curve, vertically stretch the plane curve Cuv1 created in S312 into a surface, denoted as PL2. Select Duv1, and based on the surface PL2, assign the offset height H1 of the starting and ending points of Duv1. This will yield a spatial curve with the same contour as the plane curve Cuv1, but with corresponding elevation information. ,

[0134] Offset height of the i-th segment termination point The formula is:

[0135]

[0136] in:

[0137] Slope;

[0138] Let be the length of the i-th space curve segment;

[0139] The offset height of the end point of the (i-1)th segment.

[0140] Repeat step S314 above and give the following results respectively. , … The starting and ending points are offset by height, and a space curve is generated. , … , The starting point offset height is The height offset of the endpoint;

[0141] S315, Generate the hole axis, which is generated in step S314. , , … By combining them into a single tunnel axis, a tunnel axis L with elevation information is obtained;

[0142] S316, generate the tunnel axis template, encapsulate the tunnel axis S and its manufacturing process into a template and name it "tunnel axis template", and then output the elevation of the tunnel entrance point, the elevation of the exit point, the length of the tunnel axis, the station number of the starting point 1, the station number of the starting point 2, ..., the station number of the starting point m as the design results.

[0143] At this point, the adjustable parameters published for the three-dimensional tunnel axis template should include the horizontal distances from the starting point 1, 2, ..., and m; the slope ratios of starting section 1, 2, ..., and m+1. Furthermore, in step S3, the design content and method for the auxiliary tunnel concrete structure template are as follows:

[0144] S321, Generate the hole axis line. Call the hole axis line template created in step S3, adjust the corresponding parameters, generate the required hole axis line, and use it as the input element of the auxiliary cavern concrete structure template.

[0145] S322, Determine the vertical direction of the tunnel cross-section. Based on the tunnel axis inlet point, make a vertical offset point Z1 in the Z direction, and connect the inlet point and Z1 to form line L. Z The vertical direction of the cavern cross-section;

[0146] S323, Draw the interior and exterior outlines of the tunnel. Construct a vertical plane PL2 through the tunnel axis inlet point. Based on the tunnel axis inlet point and plane PL2, create a positioning diagram, ensuring that the V direction of the positioning diagram is parallel to the L direction. Z Draw the horseshoe-shaped cross-section inner contour in the figure, perform parametric processing, and output the inner contour of the cavern; the drainage ditch is arranged in three ways: left side, right side, and double side. Draw three inner contour sketches according to the arrangement of the drainage ditch. At the same time, draw the outer contour of the cavern and output it.

[0147] S324, Set the direction of the drainage ditch, create a string parameter named "Drainage Ditch Direction", and assign multiple values: left, right, and both sides; Create curve C and isolate it, and associate curve C with different cave interior contours. For example, when the parameter "Drainage Ditch Direction" = "Left", let curve C = cave interior contour B1, so as to control the cave interior contour with the parameter "Drainage Ditch Direction".

[0148] S325, Create the cavern body. Perform an envelope sweep on the curve C created in step S324 and the outer contour of the cavern. The sweep line used is the cavern axis created in step S321. The inner contour sweep body is denoted as B1 and the outer contour sweep body is denoted as B2. Use B2 as the base object and trim it with B1 to obtain horseshoe-shaped cavern bodies with different drainage ditch layout directions.

[0149] S326, Create a single-section formwork template. Encapsulate the tunnel body created in step S325, its creation process, and parameters into a template and name it "horseshoe-shaped tunnel template".

[0150] S327, Create templates for other cross-sectional tunnel forms. Repeat steps S321-S326 to create "circular tunnel templates" and "gate-shaped tunnel templates".

[0151] S328, encapsulated auxiliary cavity assembly template.

[0152] 1) Call the hole axis template created in steps S311-S316 and adjust the parameters to obtain a suitable hole axis.

[0153] 2) Call the "horseshoe-shaped tunnel template", "circular tunnel template" and "city gate-shaped tunnel template" created in steps S326 and S327 respectively.

[0154] 3) Referring to step S324, set the multi-value parameter "cross-section form" and assign it multiple values ​​such as "horseshoe", "circular", and "gateway". Link the multi-value parameter with the corresponding tunnel template to form a tunnel body whose tunnel form can be controlled by parameters.

[0155] 4) Package the tunnel body and its creation process and parameters into a template and name it "Ancillary Cavern Concrete Structure Template".

[0156] At this point, the adjustable parameters released for the concrete structure formwork of the auxiliary tunnel should also include the tunnel cross-section type, which includes circular tunnels, horseshoe-shaped tunnels, and city gate-shaped tunnels. Specific parameters for the circular tunnel include the tunnel radius and lining thickness.

[0157] The specific parameters of the horseshoe-shaped tunnel include bottom slab width, lining thickness, tunnel radius, drainage ditch height, drainage ditch width, distance from bottom slab to tunnel axis, and drainage ditch direction.

[0158] The specific parameters of the city gate-shaped tunnel include the bottom slab width, lining thickness, crown radius, sidewall height, drainage ditch height, drainage ditch width, distance from the bottom slab to the tunnel axis, and drainage ditch direction. The value of H in step S5 is determined based on the project design stage and the required model accuracy. When higher model accuracy is required, H can be a smaller value; when lower model accuracy is required, H can be a larger value to accelerate point generation.

[0159] Example 1

[0160] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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 some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0161] In the description of this invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0162] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can also refer to the internal connection of two components; and they can refer to a wireless connection or a wired connection. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0163] In the description of this invention, it should be noted that the term "and / or" as used in this application specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0164] The present invention will be further elaborated in detail using the design process of an underground auxiliary cavern group of a pumped storage power station as a specific embodiment. This pumped storage power station is a hybrid pumped storage power station and is currently in the pre-feasibility study stage. Taking the design of four auxiliary cavern groups as an example, the cavern axes of the four auxiliary caverns are L1, L2, L3, and L4, and are labeled as follows. Figure 6 As shown. In this embodiment, the 3D design platform is selected as the 3DE 3D design platform, but other 3D design platforms can also be selected according to the actual situation. The specific design process of this auxiliary cavern group is as follows:

[0165] Step S1: Generate a 3D geological model and contour lines for a hybrid pumped storage power project area. Process the field survey data of terrain and geology, import it into the 3DE 3D design platform to generate a 3D geological model including the terrain, and use the terrain data to generate 3D contour lines in the 3D platform;

[0166] Step S2: Design the tunnel axis planar route. Initially determine the starting point of the auxiliary tunnel axis. Based on topographical and geological conditions and other engineering boundary conditions, determine the planar route of the tunnel axis in a 3D platform, and identify turning points on the planar tunnel axis, such as... Figure 3 and Figure 4 As shown.

[0167] Step S3: Generate the 3D tunnel axis line. The tunnel axis line planar route created in Step S2 is used as the input element of the 3D axis design template with elevation information to quickly generate the 3D tunnel axis line with spatial elevation data. Then, using the 3D tunnel axis line as the input element, the auxiliary tunnel concrete structure template is imported. The parameter values ​​of the 3D axis design template and the auxiliary tunnel concrete structure template are adjusted to obtain the preliminary design result of a single 3D tunnel that meets the design requirements.

[0168] Step S4: Generate a three-dimensional underground cavern complex. (For example...) Figure 6 As shown, repeating steps S2-S3 will yield four auxiliary cavern axes and their concrete structures, creating an underground cavern group. The caverns are numbered L1, L2, L3, and L4 in the order they were generated.

[0169] Step S5: Draw points on the axis. When i=1, select axis L1, and draw points on axis L1 at 100-meter intervals to obtain points P. 11 P 12 P 13 P 14 P 15 P 16 And obtain the point set P1(P 11 P 12 P 13 P 14 P 15 P 16 Using the same method, point P is generated sequentially when i=2, 3, 4. 11 …P 21 …and obtain the point set P2(P 21 P 22 P 23 P 25 P 26 ), P3(P 31 P 32 P 33 P 34 P 35 P 36 ), P4 (P 41 P 42 P 43 P 44 P 45 P 46 ).

[0170] Step S6: Calculate the distance between caverns. Calculate the distance P between any two points in the point sets P1, P2, P3, and P4 sequentially. rj- P qw The two points must belong to different tunnel axes L. i (i=1, 2, 3, 4), and subtract the distance B from the walls of the two chambers to their respective chamber axes. r and B q Finally, the distance D between the caverns was obtained. rj-qw :

[0171] D rj-qw =P rj- P qw -B r -B q

[0172] in:

[0173] r and q cannot both take the same value at the same time, that is, r ≠ q;

[0174] P rj Let j be the point on the r-th axis, where r∈L i (i=1, 2, 3, 4);

[0175] P qw Let w be the w-th point on the q-th axis, where q∈L i (i=1, 2, 3, 4);

[0176] P rj ∈P in (P 11 …P 21 …P in , i=1, 2, 3, 4; n=1, 2, 3, 4, 5, 6);

[0177] P qw ∈P in (P 11 …P 21 …P in , i=1, 2, 3, 4; n=1, 2, 3, 4, 5, 6);

[0178] B r This represents the distance from the r-th axis to the wall along the r-th axis.

[0179] B q This represents the distance from the q-th axis to the wall along the q-th axis.

[0180] P rj- P qw Let be the distance between the j-th point on the r-th axis and the w-th point on the q-th axis.

[0181] Step S7: Output the distance matrix for each chamber. Based on the calculation results of step S6, output the distance matrix from a certain axis to other chambers. For example: when r=1, q=2, j=1, 2, 3, 4, 5, 6; w=1, 2, 3, 4, 5, 6; D 12 D represents the distance matrix between the first and second caverns. 12 for:

[0182] D 12 =D 1j-2w =

[0183] in: This represents the distance between the first point on the first chamber and the first point on the second chamber; This represents the distance between the j-th point in the first cavern and the w-th point in the second cavern.

[0184] Output the distance matrix D between any two caverns r and q. rq Then it is:

[0185] D rq =D rj-qw =

[0186] Step S8: Calculate the minimum distance between each axis. Find the minimum value MinD among the distance matrices in step S8. rq And generate the minimum distance matrix min D between the auxiliary chambers:

[0187] min D=

[0188] Where: min D 12 This represents the minimum distance between chamber 1 and chamber 2; min D rq This represents the minimum distance between cavern r and cavern q.

[0189] Step S9: Determine if the distance meets the requirements. This involves determining each minimum distance in step S9. D rq The size of the minimum distance QD between the caverns required or recommended in the design specifications for pumped storage power stations.

[0190] like D rq QD, then find D rq The corresponding step S8 The design axis of the r-th cavern is adjusted to align with that of the q-th cavern, thereby adjusting the positions of the j-th point in the r-th cavern and the w-th point in the q-th cavern. In this embodiment, after three design modifications (i.e., repeating steps S2-S9 three times), the design requirements are met. D rq QD;

[0191] Further, in step S2, after initially determining the starting point of the auxiliary cavern axis, a plane parallel to the default horizontal plane (XY plane) of the three-dimensional platform is created at the initial starting point. The three-dimensional contour lines and three-dimensional geological bodies are viewed from a top-down perspective along the normal direction of this plane. Then, based on the topographic and geological conditions reflected by the three-dimensional contour lines and three-dimensional geological bodies, as well as other boundary conditions around the project, an initial planar route of the cavern axis without elevation information, conforming to design specifications, is drawn, and the inflection points, starting points, and coordinates of the planar route are output. For example... Figure 2As shown, the specific steps are as follows:

[0192] S211, Determine control parameters. Based on the layout principles of the auxiliary caverns, determine the elevation of the inner side of the cavern within the mountain. Controlling slope ratio parameters Other boundary conditions.

[0193] S212, Select Exit Elevation The preliminary elevation of the cavern's exit side on the mountainside has been selected. The elevation serves as the endpoint of the plane curve along the tunnel axis.

[0194] S213. Based on the location of the auxiliary chamber inside the mountain, the location of the chamber's exit from the mountain, and the boundary conditions, draw the plane curve of the cave axis. .

[0195] S214, according to length and elevation difference Calculate the design slope ratio of the tunnel axis. .

[0196] in:

[0197]

[0198]

[0199] S215, and To make a comparison, if Then the plane curve If the requirements are met, repeat steps S212-S214 until the slope ratio parameters are met. The required plane curve of the tunnel axis.

[0200] Furthermore, in this embodiment, the three-dimensional hole axis template mentioned in step S3 is designed based on the 3DE three-dimensional design platform. The specific design method and steps are as follows:

[0201] S311, Determine the basic parameters of the tunnel axis. Based on the design requirements, determine the basic control parameters of the auxiliary tunnel axis, namely: distance s1 from the starting point 1, distance s2 from the starting point 2, ..., distance s from the starting point m to the starting point. m Slope Slope ..., slope ratio .

[0202] S312, Establish the planar curve. According to the design requirements, first determine the starting point and elevation of the tunnel axis. At the starting point, create a plane PL1 parallel to the horizontal XY plane, and based on the starting point and plane PL1, create a positioning sketch. In this sketch, draw the planar curve of the required tunnel axis projected onto the XY plane, denoted as Cuv1. Use Cuv1 as the input element for the tunnel axis template.

[0203] S313, Determine the starting points of the slope. On the plane curve Cuv1 created in step S312, select m points as the starting points of the tunnel axis, denoted as Q1, Q2, ..., Q... m Its position is determined by the distances s1, s2, ..., s from the starting point and the initial point on Cuv1. m Sure.

[0204] S314, divides the planar curve Cuv1. Based on Q1, Q2, ..., Q... m Divide Cuv1 into m+1 segments, and label them Duv1, Duv2, Duv3, ..., Duv1 from the starting point. m+1 Assign elevation information to the plane curve. Vertically stretch the plane curve Cuv1 created in S312 into a surface, denoted as PL2. Select Duv1, and based on the surface PL2, assign the offset height H1 of the start and end points of Duv1. This will yield a spatial curve with the same contour as the plane curve Cuv1, but with elevation information. .

[0205] Offset height of the i-th segment termination point The formula is:

[0206]

[0207] in:

[0208] Slope;

[0209] Let be the length of the i-th space curve segment;

[0210] It represents the offset height of the (i-1)th segment's termination point.

[0211] Repeat step S314 above and give the following results respectively. , … The starting and ending points are offset by height, and a space curve is generated. , … , The starting point offset height is The endpoint offset height.

[0212] S315, Generate the hole axis. (This refers to the process of generating the hole axis in step S314.) , , … By combining them into a single tunnel axis, a tunnel axis L with elevation information is obtained.

[0213] S316, Generate Tunnel Axis Template. The tunnel axis S and its fabrication process are encapsulated into a template and named "Tunnel Axis Template". The elevations of the tunnel entrance and exit points, the tunnel axis length, the station number of the starting point 1, the station number of the starting point 2, ..., and the station number of the starting point m are then output as design results.

[0214] Furthermore, the adjustable parameters published by the three-dimensional tunnel axis template include: horizontal distance from the starting point 1 to the starting point, horizontal distance from the starting point 2 to the starting point, ..., horizontal distance from the starting point n to the starting point; slope ratio of starting section 1, slope ratio of starting section 2, ..., slope ratio of starting section m+1.

[0215] Furthermore, in this embodiment, the formwork for the auxiliary cavern concrete structure described in step S3 is designed based on a 3DE three-dimensional design platform. The specific design method and steps are as follows:

[0216] S321, Generate the tunnel axis line. Call the tunnel axis line template created in step S3, adjust the corresponding parameters, generate the required tunnel axis line, and use it as the input element for the auxiliary tunnel concrete structure template.

[0217] S322, Determine the vertical direction of the tunnel cross-section. Based on the tunnel axis inlet point, make an offset point Z1 in the vertical Z direction, and connect the inlet point and Z1 to form line L. Z The vertical direction of the cavern cross-section.

[0218] S323, Draw the interior and exterior outlines of the tunnel. Construct a vertical plane PL2 through the tunnel's inlet point. Based on the inlet point and plane PL2, create a positioning diagram, ensuring the V direction of the positioning diagram is parallel to the L direction. Z Draw the horseshoe-shaped cross-section inner contour in the drawing, perform parametric processing, and output the interior contour of the cavern. The drainage ditch can be arranged in three ways: left-side, right-side, and double-side. Draw three inner contour sketches according to the location of the drainage ditch. Simultaneously, draw the outer contour of the cavern and output it.

[0219] S324, Set the drainage ditch direction. Create a string parameter named "Drainage Ditch Direction" and assign multiple values: left, right, and both sides. Create and isolate curve C, and associate curve C with different cave interior contours. For example, when the parameter "Drainage Ditch Direction" = "Left", let curve C = cave interior contour B1. This implements the control of the cave interior contour using the parameter "Drainage Ditch Direction".

[0220] S325, Create the cavern body. Perform an envelope sweep on the curve C created in step S324 and the cavern's outer contour. The sweep line used is the cavern axis created in step S321. The inner contour sweep volume is denoted as B1, and the outer contour sweep volume is denoted as B2. Using B2 as the base object and trimming it with B1, horseshoe-shaped cavern bodies with different drainage ditch layout directions can be obtained.

[0221] S326, Create a single-section tunnel template. Encapsulate the tunnel body created in step S325, its creation process, and parameters into a template and name it "Horseshoe-shaped Tunnel Template".

[0222] S327, Create templates for other cross-sectional shapes of tunnels. Repeat steps S321-S326 to create "circular tunnel templates" and "gate-shaped tunnel templates".

[0223] S328, Encapsulate the complete template for the auxiliary cavern. (1) Call the tunnel axis template created in steps S311-S316 and adjust the parameters to obtain a suitable tunnel axis. (2) Call the "horseshoe-shaped tunnel template", "circular tunnel template" and "city gate-shaped tunnel template" created in steps S326 and S327 respectively. (3) Referring to step S324, set the multi-value parameter "section form" and assign the multi-value "horseshoe", "circular" and "city gate shape". Link the multi-value parameters with the corresponding tunnel templates to form a tunnel body whose tunnel form can be controlled by parameters. (4) Encapsulate the tunnel body and its creation process and parameters into a template and name it "auxiliary cavern concrete structure template".

[0224] Furthermore, the adjustable parameters for the concrete structure formwork of the ancillary tunnel include: the tunnel cross-section type specifically includes: circular tunnels, horseshoe-shaped tunnels, and city gate-shaped tunnels, such as... Figure 7 As shown. Specific parameters for the circular tunnel include: tunnel radius and lining thickness; specific parameters for the horseshoe-shaped tunnel include: floor width, lining thickness, tunnel radius, drainage ditch height, drainage ditch width, distance from floor to tunnel axis, and drainage ditch direction; specific parameters for the arch-shaped tunnel include: floor width, lining thickness, crown radius, sidewall height, drainage ditch height, drainage ditch width, distance from floor to tunnel axis, and drainage ditch direction.

Claims

1. A three-dimensional forward design method for auxiliary cavern groups of pumped storage power stations, characterized in that: The aforementioned three-dimensional forward design method includes the following steps: Step S1: Generate a three-dimensional geological model and contour lines. Process the field survey data of terrain and geology, import it into the three-dimensional design platform to generate a three-dimensional geological model containing the terrain, and use the terrain data to generate three-dimensional contour lines in the three-dimensional platform. Step S2: Design the plane route of the tunnel axis, initially determine the starting point of the auxiliary tunnel axis, and determine the plane route of the tunnel axis in the three-dimensional platform based on the topographic and geological conditions and other boundary conditions of the project, and determine the starting point of the slope on the plane tunnel axis. Step S3: Generate a three-dimensional tunnel axis. Use the tunnel axis planar line made in step S2 as the input element of the three-dimensional axis design template with elevation and elevation information to quickly generate a three-dimensional tunnel axis with spatial elevation. Then, using the three-dimensional tunnel axis as the input element, import the auxiliary tunnel concrete structure template, adjust the parameter values ​​of the three-dimensional axis design template and the auxiliary tunnel concrete structure template, and obtain the preliminary design result of a single three-dimensional tunnel that meets the design requirements. Step S4, generating three-dimensional underground cavern group, repeating steps S2-S3, that is, obtaining multiple subsidiary cavern axes and subsidiary cavern concrete structures and generating underground cavern group, each cavern is sequentially numbered as L according to the generation order i (i = 1, 2, 3…n); Step S5: Draw points on the axis. When i=1, select axis L1 and draw a point on axis L1 at intervals of H meters, generating point P sequentially. 11 P 12 P 13 …and obtain the point set P 1n (n=1, 2, 3…); Using the same method, when i=2, 3, 4…n, point P is generated sequentially. 11 …P 21 …and obtain the point set P in (P 11 …P 21 …P in , i=1, 2, 3...; n=1, 2, 3...); Step S6: Calculate the spacing between caverns, and calculate the point set P sequentially. i (P 11 …P 21 …P in The distance P between points in (i=1, 2, 3…; n=1, 2, 3…) rj- P qw And subtract the distance B from the walls of the two chambers to their respective chamber axes. r and B q Finally, the distance D between the caverns is obtained. rj-qw for D rj-qw =P rj- P qw -B r -B q in: r and q cannot both take the same value at the same time, that is, r ≠ q; P rj Let j be the point on the r-th axis, where r∈L i ; P qw Let w be the w-th point on the q-th axis, where q∈L i ; P rj ∈P in (P 11 …P 21 …P in ,i=1、2、3…;n=1、2、3…); P qw ∈P in (P 11 …P 21 …P in ,i=1、2、3…;n=1、2、3…); B r This represents the distance from the r-th axis to the wall along the r-th axis. B q This represents the distance from the q-th axis to the wall along the q-th axis. P rj- P qw Let be the distance between the j-th point on the r-th axis and the w-th point on the q-th axis; Step S7: Output the distance matrix of each chamber. Based on the calculation results of step S6, output the distance matrix from a certain axis to other chambers. For example, when r=1, q=2, j=1, 2, 3…; w=1, 2, 3…; D 12 D represents the distance matrix between the first and second caverns. 12 for: D 12 =D 1j-2w = , in: This represents the distance between the first point on the first chamber and the first point on the second chamber; Let w represent the distance between the j-th point in the first cavern and the w-th point in the second cavern. Output the distance matrix D between any two caverns r and q. rq Then it is: D rq =D rj-qw = ; Step S8: Calculate the minimum distance between each axis, and find the minimum value Min D between each distance matrix in step S8. rq And generate the minimum distance matrix min D between the auxiliary caverns. my D= , in: min D 12 This indicates the minimum distance between cavern 1 and cavern 2; min D rq This represents the minimum distance between cavern r and cavern q; Step S9: Determine if the distance meets the requirements, and check each minimum distance from step S8. D rq The size of the minimum distance QD between chambers required or recommended in the design specifications for pumped storage power stations. like D rq QD, then find D rq The corresponding step S8 Adjust the design axis of the r-th cavern and the design axis of the q-th cavern to adjust the position of the j-th point on the r-th cavern and the w-th point on the q-th cavern. Repeat steps S2-S9 until the design requirements are met. D rq QD; like D rq If QD is met, the design of the auxiliary cavern axis meets the requirements, and the design process for the auxiliary cavern is now complete.

2. The three-dimensional forward design method for auxiliary cavern groups of pumped storage power stations according to claim 1, characterized in that: In step S2, after initially determining the starting point of the auxiliary cavern axis, a plane parallel to the XY plane of the default coordinate system of the three-dimensional platform is created at the initial starting point. The three-dimensional contour lines and three-dimensional geological bodies are viewed from a top-down perspective along the normal direction of this plane. Based on the topographic and geological conditions reflected by the three-dimensional contour lines and three-dimensional geological bodies, as well as other boundary conditions around the project, an initial planar route of the cavern axis without elevation information, conforming to design specifications, is drawn. The inflection points, slope initiation points, and their coordinates are then output. The specific steps are as follows: S211, Determine the control parameters and, based on the layout principles of the auxiliary caverns, determine the elevation of the inner side of the mountain for the auxiliary caverns. Controlling slope ratio parameters Other boundary conditions; S212, Select Exit Elevation The preliminary elevation of the mountain exit side of the cave auxiliary chamber has been selected. The elevation of the endpoint of the plane curve of the tunnel axis; S213. Based on the location of the auxiliary cavern inside the mountain, the location of the auxiliary cavern's exit from the mountain, and the boundary conditions, draw the plane curve of the cavern axis. ; S214, according to length and elevation difference Calculate the design slope ratio of the tunnel axis. , in: ， ， S215, and To make a comparison, if Then the plane curve If the requirements are met, repeat steps S212-S214 until the slope ratio parameters are met. The required plane curve of the tunnel axis.

3. The three-dimensional forward design method for auxiliary cavern groups of pumped storage power stations according to claim 1, characterized in that: The design content and method of the three-dimensional hole axis template in step S3 are as follows. S311, Determine the basic parameters of the tunnel axis. Based on the design requirements, determine the basic control parameters of the auxiliary tunnel axis, namely, the distance s1 from the starting point 1 to the starting point, the distance s2 from the starting point 2 to the starting point, ..., the distance s from the starting point m to the starting point. m Slope Slope ..., slope ratio ; S312, Establish a planar curve. According to the design requirements, first determine the starting point and elevation of the tunnel axis. At the starting point, draw a plane PL1 parallel to the horizontal XY plane. Based on the starting point and plane PL1, draw a sketch. In this sketch, draw the planar curve of the required tunnel axis projected onto the XY plane, denoted as Cuv1. Use Cuv1 as the input element of the tunnel axis template. S313, Determine the starting points of the slope. Take m points on the plane curve Cuv1 made in step S312 as the starting points of the tunnel axis, and denot them as Q1, Q2, ..., Q... m Its position is determined by the distances s1, s2, ..., s from the starting point and the initial point on Cuv1. m Sure; S314, divide the plane curve Cuv1, based on Q1, Q2, ..., Q... m Divide Cuv1 into m+1 segments, and label them Duv1, Duv2, Duv3, ..., Duv1 from the starting point. m+1 To assign elevation information to the plane curve, vertically stretch the plane curve Cuv1 created in S312 into a surface, denoted as PL2. Select Duv1, and based on the surface PL2, assign the offset height H1 of the starting and ending points of Duv1. This will yield a spatial curve with the same contour as the plane curve Cuv1, but with corresponding elevation information. , Offset height of the i-th segment termination point The formula is: ， in: Slope; Let be the length of the i-th space curve segment; The offset height of the (i-1)th segment's termination point. Repeat step S314 above and give the following results respectively. , … The starting and ending points are offset by height, and a space curve is generated. , … , The starting point offset height is The height offset of the endpoint; S315, Generate the hole axis, which is generated in step S314. , , … By combining them into a single tunnel axis, a tunnel axis L with elevation information is obtained; S316, generate the tunnel axis template, encapsulate the tunnel axis S and its manufacturing process into a template and name it "tunnel axis template", and then output the tunnel entrance elevation, exit elevation, tunnel axis length, starting point station 1, starting point station 2, ..., starting point m station as design results.

4. The three-dimensional forward design method for auxiliary cavern groups of pumped storage power stations according to claim 3, characterized in that: The adjustable parameters published by the three-dimensional tunnel axis template include the horizontal distance from the starting point 1 to the starting point, the horizontal distance from the starting point 2 to the starting point, ..., the horizontal distance from the starting point m to the starting point; the slope ratio of the starting section 1, the slope ratio of the starting section 2, ..., the slope ratio of the starting section m+1.

5. The three-dimensional forward design method for auxiliary cavern groups of pumped storage power stations according to claim 1, characterized in that: In step S3, the design content and method of the concrete structure formwork for the auxiliary cavern are as follows: S321, Generate the hole axis line. Call the hole axis line template created in step S3, adjust the corresponding parameters, generate the required hole axis line, and use it as the input element of the auxiliary cavern concrete structure template. S322, Determine the vertical direction of the tunnel cross-section. Based on the tunnel axis inlet point, make a vertical offset point Z1 in the Z direction, and connect the inlet point and Z1 to form line L. Z The vertical direction of the cavern cross-section; S323, Draw the interior and exterior outlines of the tunnel. Construct a vertical plane PL2 through the tunnel axis inlet point. Based on the tunnel axis inlet point and plane PL2, create a positioning diagram, ensuring that the V direction of the positioning diagram is parallel to the L direction. Z Draw the horseshoe-shaped cross-section inner contour in the figure, perform parametric processing, and output the inner contour of the cavern; the drainage ditch is arranged in three ways: left side, right side, and double side. Draw three inner contour sketches according to the arrangement of the drainage ditch. At the same time, draw the outer contour of the cavern and output it. S324, Set the direction of the drainage ditch, create a string parameter named "Drainage Ditch Direction", and assign multiple values: left, right, and both sides; Create curve C and isolate it, and associate curve C with different cave interior contours. For example, when the parameter "Drainage Ditch Direction" = "left", let curve C = cave interior contour B1, so as to control the cave interior contour with the parameter "Drainage Ditch Direction". S325, Create the cavern body. Perform an envelope sweep on the curve C created in step S324 and the outer contour of the cavern. The sweep line used is the cavern axis created in step S321. The inner contour sweep body is denoted as B1 and the outer contour sweep body is denoted as B2. Use B2 as the base object and trim it with B1 to obtain horseshoe-shaped cavern bodies with different drainage ditch layout directions. S326, Create a single-section formwork template. Encapsulate the tunnel body created in step S325, its creation process, and parameters into a template and name it "Horseshoe-shaped Tunnel Template". S327, Create templates for other cross-sectional tunnel forms. Repeat steps S321-S326 to create "circular tunnel templates" and "gate-shaped tunnel templates". S328, Encapsulated auxiliary cavity assembly template 1) Call the hole axis template created in steps S311-S316 and adjust the parameters to obtain a suitable hole axis. 2) Call the "horseshoe-shaped tunnel template", "circular tunnel template" and "city gate-shaped tunnel template" created in steps S326 and S327 respectively. 3) Referring to step S324, set the multi-value parameter "cross-section form" and assign it multiple values ​​such as "horseshoe", "circular", and "gateway"; link the multi-value parameter with the corresponding tunnel template to form a tunnel body whose tunnel form can be controlled by parameters. 4) Package the tunnel body and its creation process and parameters into a template and name it "Ancillary Cavern Concrete Structure Template".

6. The three-dimensional forward design method for auxiliary cavern groups of pumped storage power stations according to claim 5, characterized in that: The adjustable parameters released for the concrete structure formwork of the ancillary cavern also include the tunnel cross-section type, which includes circular tunnels, horseshoe-shaped tunnels, and city gate-shaped tunnels.

7. The three-dimensional forward design method for auxiliary cavern groups of pumped storage power stations according to claim 6, characterized in that: The specific parameters of the circular tunnel include the tunnel radius and the lining thickness; The specific parameters of the horseshoe-shaped tunnel include bottom slab width, lining thickness, tunnel radius, drainage ditch height, drainage ditch width, distance from bottom slab to tunnel axis, and drainage ditch direction. The specific parameters of the city gate-shaped tunnel include the bottom slab width, lining thickness, crown radius, sidewall height, drainage ditch height, drainage ditch width, distance from the bottom slab to the tunnel axis, and drainage ditch direction.

8. The three-dimensional forward design method for auxiliary cavern groups of pumped storage power stations according to claim 1, characterized in that: In step S5, the value of H is determined based on the project design stage and the required model accuracy. When the required model accuracy is high, H can be a smaller value; when the required model accuracy is low, H can be a larger value to speed up the generation of points.

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