Three-dimensional design method for ground pre-grouting drilling trajectory based on 3DE platform

Abstract

The application discloses a kind of ground pre-grouting borehole trajectory three-dimensional design methods based on 3DE platform.It includes the following steps: finding suitable ground position arrangement grouting drill field;Draft ground pre-grouting borehole orifice position, grouting section target point and three-dimensional coordinates of grouting stop point, design L-type ground pre-grouting borehole trajectory vertical section, build-up section and three-dimensional design drawing of grouting section in order by directional drilling borehole trajectory three-dimensional design software, and read each subsection length, and borehole trajectory total length;Borehole full trajectory coordinates are extracted and exported;Establish borehole trajectory model;Establish tunnel model;Create borehole trajectory model engineering drawing and tunnel model engineering drawing, show relative position relationship;Judge whether the relative position relationship is correct;In the modeling platform, and save, export design drawing.The application improves the accuracy of drilling and grouting engineering quantity calculation, and can verify the rationality and accuracy of borehole trajectory.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of underground engineering, in particular to a three-dimensional design method for ground pre-grouting drilling trajectory based on a 3DE platform. BACKGROUND

[0002] Deeply buried long tunnel construction is increasingly common in underground engineering construction, and the geological conditions are increasingly complex, so it is inevitable to pass through adverse geological sections such as sudden mud and water gushing. The ground pre-grouting technology can pre-strengthen the surrounding rock of the tunnel and block the water body, and does not occupy the straight construction period, so it is applied in more and more tunnel engineering construction.

[0003] For the adverse geological area passed through by the deeply buried tunnel, the length of the grouting section needs to be hundreds of meters or even thousands of meters, so the length of the ground pre-grouting drilling is relatively long.

[0004] How to accurately calculate the drilling length and grouting quantity is particularly important for engineering investment control, which requires accurate design and drawing of the trajectory of the ground pre-grouting drilling. However, the existing technology about the trajectory of the ground pre-grouting drilling

[0005] Firstly, the design of the trajectory of the ground pre-grouting drilling in the prior art adopts a plan view or a schematic view, which can only play a schematic role and does not truly express the three-dimensional spatial form of the drilling trajectory, so the calculation accuracy of the engineering quantity is not high.

[0006] Secondly, the spatial position relationship between the trajectory of the ground pre-grouting drilling and the tunnel cannot be displayed, and the accuracy of the drilling trajectory cannot be verified, especially when the tunnel section is large and the number of ground pre-grouting drillings is large, which is easy to present a three-dimensional cross distribution in space, which is not conducive to engineering construction. SUMMARY

[0007] In view of the deficiencies of the prior art, the present application provides a three-dimensional design method for the trajectory of the ground pre-grouting drilling based on a 3DE platform, which not only enhances the spatial visualization expression of the drilling trajectory and improves the accuracy of the calculation of the drilling and grouting engineering quantity, but also can display the spatial position relationship between the drilling trajectory and the tunnel and verify the rationality and accuracy of the drilling trajectory.

[0008] To achieve the above-mentioned purpose, the three-dimensional design method for the trajectory of the ground pre-grouting drilling based on the 3DE platform comprises the following steps:

[0009] S1) Design the length of the tunnel grouting section, the arrangement parameters of the grouting holes of the grouting section, and find a suitable ground position to arrange the grouting drilling field;

[0010] The arrangement parameters include the grouting hole arrangement circle diameter, the number of grouting holes, the included angle between adjacent grouting holes, and the grouting curtain thickness;

[0011] The thickness of the grouting curtain must satisfy the following formula

[0012]

[0013] Where,

[0014] B represents the thickness of the grouting curtain,

[0015] D represents the diameter of the grouting hole circle.

[0016] α represents half of the angle between adjacent grouting holes,

[0017] R represents the maximum excavation radius of the tunnel,

[0018] r represents the single hole grouting diffusion diameter,

[0019] B min Indicates the minimum grouting curtain thickness;

[0020] S2) For a single ground pre-grouting borehole, the three-dimensional coordinates of the borehole position, the grouting section entry point, and the grouting stop point are determined. The three-dimensional design drawings of the vertical section, the deflection section, and the grouting section of the single L-shaped ground pre-grouting borehole trajectory are sequentially designed using directional drilling trajectory three-dimensional design software, and the lengths of each segment and the total length of the borehole trajectory are read.

[0021] S3) extracting and exporting the full trajectory coordinates of each designed L-shaped ground pre-grouting borehole, wherein the full trajectory coordinates include the borehole trajectory control points;

[0022] S4) in the modeling platform, establishing each L-shaped ground pre-grouting drilling trajectory model according to the full trajectory coordinates of each L-shaped ground pre-grouting drilling hole;

[0023] S5) establishing a tunnel model in the modeling platform, wherein the tunnel model includes a tunnel axis and a tunnel contour surface;

[0024] S6) creating a model engineering drawing of each L-shaped ground pre-grouting drilling trajectory and a tunnel model engineering drawing, showing the relative positional relationship between each L-shaped ground pre-grouting drilling trajectory and the tunnel;

[0025] S7) determining whether the relative positional relationship between each L-shaped ground pre-grouting drilling trajectory and the tunnel is correct; if not, returning to step S2) to recheck and determine the three-dimensional coordinates of the hole opening position, the grouting section entry point, and the grouting stop point, and proceeding according to subsequent steps; if correct, proceeding to step S8);

[0026] S8) Drawings are created and saved in the modeling platform, and design drawings are exported to guide engineering construction.

[0027] Further, in S1), according to the length of the tunnel grouting section required and the number of grouting holes, a suitable ground position is arranged for grouting drilling field; meanwhile, according to the analysis of the adverse geological section range of water gushing and mud bursting of the tunnel, the length of the tunnel grouting section is determined; according to the required grouting curtain thickness and the single-hole grouting diffusion diameter, the number of grouting holes required is determined.

[0028] Further, in S2), the grouting section target point and the grouting stop point three-dimensional coordinates are written into a TXT file, the orifice three-dimensional coordinates of the ground pre-grouting drilling are input into the directional drilling trajectory three-dimensional design software, the grouting section target point and the grouting stop point three-dimensional coordinates in the TXT file are imported into the directional drilling trajectory three-dimensional design software, and the vertical section, the build-up section and the grouting section of the L-shaped ground pre-grouting drilling trajectory are designed in sequence.

[0029] Further, in S4), the modeling platform is a 3DE platform.

[0030] Further, in S4), the steps of establishing the L-shaped ground pre-grouting drilling trajectory model are as follows: opening the 3DE platform, creating a 3D part drawing, using macro commands to batch import the full trajectory coordinates exported in step S3 into the 3DE platform, generating a single L-shaped ground pre-grouting drilling trajectory curve, and the L-shaped ground pre-grouting drilling trajectory curve includes drilling trajectory control points.

[0031] Further, in S5), the steps of establishing the tunnel axis include determining the spatial coordinate points of the center positions of the grouting section tunnel starting point and the ending point, inputting the three-dimensional coordinates of the center positions of the grouting section tunnel starting point and the ending point into the 3DE platform, generating two points, and connecting the two points to establish a tunnel axis.

[0032] Further, in S5), the steps of establishing the tunnel contour surface include determining the excavation size of the tunnel, establishing a plane perpendicular to the tunnel axis according to the center coordinate of the grouting section tunnel starting point, drawing a tunnel excavation contour line on the plane with the tunnel center point as a reference, and sweeping the tunnel excavation contour line along the tunnel axis to generate a tunnel contour surface.

[0033] Further, in S5), the tunnel excavation contour line includes a circle, a rectangle, and a city gate shape.

[0034] Further, in S6), the engineering drawing includes an isometric drawing, a plan view, a longitudinal section view, and a transverse section view.

[0035] Further, the method for judging whether the relative position relationship between each L-shaped ground pre-grouting borehole trajectory and the tunnel is correct in S7) is as follows: on the cross section of the grouting section of the ground pre-grouting borehole and the tunnel model, the distance between each ground pre-grouting borehole and the center of the tunnel and the included angle between adjacent ground pre-grouting boreholes are measured, and if the measured value is within the allowable error range of the designed value in S1), the spatial position relationship between each L-shaped ground pre-grouting borehole trajectory and the tunnel is correct.

[0036] The present application has the advantages of:

[0037] 1. The present application uses directional drilling borehole trajectory three-dimensional design software to design the three-dimensional design diagram of the vertical section, the build-up section and the grouting section of the L-shaped ground pre-grouting borehole trajectory in sequence according to the three-dimensional coordinates of the orifice position, the grouting section entry point and the grouting stop point, and reads the length of each section, so that the drilling and grouting engineering quantity can be accurately calculated.

[0038] 2. The present application uses the 3DE platform to batch import borehole trajectory control point coordinates to generate a borehole trajectory model, realizes the modularization of borehole trajectory modeling, and uses the powerful modeling interaction function of the 3DE platform to establish a spatial model of the tunnel and the borehole trajectory, so as to verify the rationality of the borehole trajectory.

[0039] The ground pre-grouting borehole trajectory three-dimensional design method based on the 3DE platform not only improves the accuracy of drilling and grouting engineering quantity calculation, but also verifies the rationality and accuracy of the borehole trajectory, and has the advantages of high trajectory design accuracy, simple operation, high efficiency and high visualization. BRIEF DESCRIPTION OF DRAWINGS

[0040] Figure 1 is a flowchart of the present application;

[0041] Figure 2 is a geological longitudinal section of the ground pre-grouting borehole;

[0042] Figure 3 is an intersection layout of the grouting hole;

[0043] Figure 4 is a ground pre-grouting drilling site layout;

[0044] Figure 5 is a three-dimensional design diagram of the L-shaped ground pre-grouting borehole trajectory;

[0045] Figure 6 is a display interface diagram of the L-shaped ground pre-grouting borehole trajectory of the 3DE platform;

[0046] Figure 7 is a display interface diagram of the L-shaped ground pre-grouting borehole trajectory and the tunnel of the 3DE platform;

[0047] Figure 8 Figure 3 is a tunnel axis drawing of the L-shaped ground pre-grouting drilling trajectory of the 3DE platform;

[0048] Figure 9 Figure 4 is a tunnel plan drawing of the L-shaped ground pre-grouting drilling trajectory of the 3DE platform;

[0049] Figure 10 Figure 5 is a tunnel longitudinal section drawing of the L-shaped ground pre-grouting drilling trajectory of the 3DE platform;

[0050] Figure 11a Figure 6 is a cross section I-I layout drawing of the middle grouting section; Figure 10 Figure 7 is a cross section II-II layout drawing of the non-grouting section;

[0051] Figure 11b Figure 8 is a cross section III-III layout drawing of the non-grouting section; Figure 10 Figure 9 is a cross section IV-IV layout drawing of the non-grouting section;

[0052] In the figure, the ground pre-grouting drilling hole 1, the drilling trajectory control point 2, the tunnel 3, the single-hole grouting diffusion range 4, and the grouting hole arrangement circle range 5.

[0053] The ground pre-grouting drilling hole 1 includes the hole mouth 1-1, the target entry point 1-2, and the grout stopping point 1-3.

[0054] The grouting curtain thickness B, the single-hole grouting diffusion diameter r, and the grouting hole arrangement circle diameter D. DETAILED DESCRIPTION

[0055] The present application will be further described below in conjunction with the drawings and specific embodiments.

[0056] In the description of the present application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application.

[0057] The present application is a three-dimensional design method for ground pre-grouting drilling trajectory based on a 3DE platform, which can be divided into two parts: three-dimensional design of L-shaped ground pre-grouting drilling trajectory and post-processing of drilling trajectory and tunnel modeling using a modeling platform.

[0058] Specifically, as shown in the drawings, the method comprises the following steps. Figure 1

[0059] I. Three-dimensional design steps of L-shaped ground pre-grouting drilling trajectory:

[0060] ​S1) Design the length of the tunnel 3 grouting section, the arrangement parameters of the grouting hole in the grouting section, and find a suitable ground position to arrange the grouting drilling field.

[0061] The arrangement parameters include the grouting hole arrangement ring diameter, the number of grouting holes, the included angle between adjacent grouting holes, and the grouting curtain thickness;

[0062] The grouting curtain thickness needs to satisfy the following formula

[0063]

[0064] In the formula,

[0065] B represents the grouting curtain thickness,

[0066] D represents the grouting hole arrangement ring diameter,

[0067] α represents half of the included angle between adjacent grouting holes,

[0068] R represents the maximum excavation radius of the tunnel,

[0069] r represents the single-hole grouting diffusion diameter,

[0070] B min represents the minimum grouting curtain thickness.

[0071] Specifically, according to the required length of the grouting section of the tunnel 3 and the number of grouting holes, a suitable ground position is found to arrange the grouting drilling field; at the same time, according to the analysis of the adverse geological section range of water gushing and mud bursting based on the tunnel geological data, the length of the grouting section of the tunnel 3 is determined; and according to the required grouting curtain thickness B and the single-hole grouting diffusion diameter r, the required number of grouting holes is determined.

[0072] In this embodiment, as shown in FIG. 1, according to the analysis of the possible pile number range (K1-K2) of the adverse geological section such as water gushing and mud bursting based on the tunnel geological data, the length of the tunnel grouting section is determined. Then a suitable ground position is found to arrange the grouting drilling field, and the ground drilling field should generally have a relatively gentle terrain and good traffic conditions, as shown in FIG. 2. Figure 2 Figure 3 In this example, two drilling holes are arranged in a symmetrical manner, and the included angle between the two drilling holes is 2α, as shown in FIG. 3. Figure 4

[0073] S2) For a single ground pre-grouting drilling hole 1, the three-dimensional coordinates of the hole 1-1 position, the grouting section target point 1-2 and the grouting stop point 1-3 are determined, and the three-dimensional design of the vertical section, the deviation section and the grouting section of the single L-shaped ground pre-grouting drilling hole 1 is designed in sequence through the drilling trajectory three-dimensional design software, and the length of each section and the total length of the drilling trajectory are read.

[0074] ​​Specifically, the three-dimensional coordinates of the grouting section entry point 1-2 and the grouting section stop point 1-3 are written into a TXT file, the three-dimensional coordinates of the orifice 1-1 of the ground pre-grouting hole 1 are input into the directional drilling hole trajectory three-dimensional design software, the three-dimensional coordinates of the grouting section entry point 1-2 and the grouting section stop point 1-3 in the TXT file are imported into the directional drilling hole trajectory three-dimensional design software, and the vertical section, the build-up section and the grouting section of the L-shaped ground pre-grouting hole 1 trajectory are sequentially designed.

[0075] In this embodiment, the three-dimensional coordinates of the hole orifice position, the grouting section entry point and the grouting section stop point of the single L-shaped ground pre-grouting hole 1 are planned, and the three-dimensional coordinates of the grouting section entry point and the grouting section stop point are written into a TXT file. A grouting project is newly created in the directional drilling hole trajectory three-dimensional design software, the three-dimensional coordinates X0, Y0, Z0 of the L-shaped ground pre-grouting hole orifice position are input, the position coordinates X1, Y1, Z1 and X2, Y2, Z2 of the grouting section entry point and the grouting section stop point in the TXT file are imported into the directional drilling hole trajectory three-dimensional design software, and the vertical section, the build-up section and the grouting section of the L-shaped ground pre-grouting hole trajectory are sequentially designed. The three-dimensional design diagrams of the two L-shaped ground pre-grouting hole trajectories designed in this embodiment are shown in FIG. 2. Figure 5

[0076] S3) The full trajectory coordinates of each L-shaped ground pre-grouting hole 1 designed are extracted and exported, and the full trajectory coordinates include the hole trajectory control point 2.

[0077] In this embodiment, the full trajectory coordinates of the L-shaped ground pre-grouting hole designed are extracted and exported to Excel, which prepares for the modeling platform drawing.

[0078] The above steps use the directional drilling hole trajectory three-dimensional design software to sequentially design the three-dimensional design diagrams of the vertical section, the build-up section and the grouting section of the L-shaped ground pre-grouting hole trajectory according to the three-dimensional coordinates of the hole orifice position, the grouting section entry point and the grouting section stop point, and read the lengths of the sections, so that the drilling and grouting quantities can be accurately calculated.

[0079] II. Drilling trajectory and tunnel modeling post-processing steps using a modeling platform:

[0080] S4) In the modeling platform, the L-shaped ground pre-grouting hole 1 trajectory model is established according to the full trajectory coordinates of each L-shaped ground pre-grouting hole 1.

[0081] Preferably, the modeling platform is a 3DE (full name: 3DEXPERIENCE) platform.

[0082] ​Specifically, the steps of establishing the L-shaped ground pre-grouting drilling hole 1 trajectory model are as follows: opening the 3DE platform, creating a new 3D part drawing, importing the full trajectory coordinates exported in step S3 into the 3DE platform in batches by using the macro command, and generating a single L-shaped ground pre-grouting drilling hole 1 trajectory curve, wherein the L-shaped ground pre-grouting drilling hole 1 trajectory curve comprises a drilling trajectory control point 2. The display interface of the two drilling trajectories generated by the 3DE platform in this embodiment is shown in FIG. 8. Figure 6

[0083] S5) In the modeling platform, a tunnel 3 model is established, and the tunnel 3 model comprises a tunnel axis and a tunnel profile surface.

[0084] Specifically, the establishment steps of the tunnel axis comprise determining the spatial coordinate points of the center positions of the starting point and the ending point of the grouting section tunnel, inputting the three-dimensional coordinates of the center positions of the starting point and the ending point of the grouting section tunnel in the 3DE platform, generating two points, and connecting the two points to generate the tunnel axis.

[0085] Specifically, the establishment steps of the tunnel profile surface comprise determining the excavation size of the tunnel, establishing a plane perpendicular to the tunnel axis according to the center coordinate of the starting point of the grouting section tunnel, drawing a tunnel excavation profile line on the plane with the tunnel center point as a reference, and sweeping the tunnel excavation profile line along the tunnel axis to generate a tunnel profile surface.

[0086] Specifically, the tunnel excavation profile line comprises a circle, a rectangle, and a gate shape.

[0087] In this embodiment, the X, Y, and Z coordinates of the center positions of the starting point and the ending point of the grouting section tunnel are inputted by using the “point” command in the 3DE platform, and two points are generated; then the “straight line” command is used to connect the two points to generate the tunnel axis. Next, the tunnel profile surface is established. First, the excavation size of the tunnel is determined, and a plane perpendicular to the tunnel axis is established according to the center coordinate of the starting point of the grouting section tunnel; then a tunnel excavation profile line is drawn on the plane with the tunnel center point as a reference; and finally, the “sweep” command is used to sweep the tunnel excavation profile line along the tunnel axis to generate a tunnel profile surface. In this example, the tunnel section is circular, and the display interface of the established drilling trajectory and the tunnel model is shown in FIG. 9. Figure 7

[0088] S6) Creating L-shaped ground pre-grouting drilling hole 1 trajectory model engineering drawings and tunnel 3 model engineering drawings, and displaying the relative position relationship between each L-shaped ground pre-grouting drilling hole 1 trajectory and the tunnel 3.

[0089] Specifically, the engineering drawings comprise an isometric view, a plan view, a longitudinal section view, and a transverse section view.

[0090] ​​In this embodiment, the Drafting function in the 3DE platform is selected to create an engineering drawing, and the isometric view, front view functions in the engineering drawing are used to create the isometric view, plan view and longitudinal section view of the drilling trajectory and the tunnel model, as shown in Figs. 10, 11 and 12, respectively. Then the offset section segmentation function is used to create the section line, and the cross-sectional view of the drilling trajectory and the tunnel model can be generated, as shown in Figs. 13 and 14 (the cross-sectional view I-I layout of the grouting section and the cross-sectional view II-II layout of the non-grouting section, respectively), and the relative position relationship between the drilling and the tunnel can be shown after editing and labeling. Figure 8 、 9 Figure 11a 11b

[0091] S7) judging whether the relative position relationship between each L-shaped ground pre-grouting drilling hole 1 trajectory and the tunnel 3 is correct, if not, returning to step S2) to recheck and determine the three-dimensional coordinates of the orifice 1-1 position, the grouting section target point 1-2 and the grouting stop point 1-3, and following the subsequent steps; if correct, then step S8) is performed.

[0092] The method for judging whether the relative position relationship between each L-shaped ground pre-grouting drilling hole 1 trajectory and the tunnel 3 is correct is as follows: on the grouting section cross section of the ground pre-grouting drilling hole 1 and the tunnel 3 model, the distance between each ground pre-grouting drilling hole 1 and the tunnel 3 center and the included angle between adjacent ground pre-grouting drilling holes 1 are measured, if the measured value is within the allowable error range of the design value in step S1), then the spatial position relationship between each L-shaped ground pre-grouting drilling hole 1 trajectory and the tunnel 3 is correct.

[0093] In this embodiment, the distance D1 and D2 between the grouting section drilling hole and the tunnel 3 center and the half angle a1 and a2 between adjacent drilling holes are measured, and the measured value is consistent with the design value in step S1), i.e. D=D1=D2 and a=a1=a2, then the spatial position of the drilling trajectory is correct.

[0094] S8) drawing and saving in the modeling platform, exporting the design drawing to guide the engineering construction.

[0095] In this embodiment, after drawing and saving in the 3DE platform, the DWG format file is exported to design the drawing to guide the engineering construction.

[0096] The above steps use the modeling platform to batch import the drilling trajectory control point coordinates to generate the drilling trajectory model, realize the modularization of the drilling trajectory modeling, and use the powerful modeling interaction function of the 3DE platform to establish the spatial model of the tunnel and the drilling trajectory, so as to verify the rationality of the drilling trajectory.

[0097] ​​​The three-dimensional design method of the ground pre-grouting drilling track based on the 3DE platform not only improves the accuracy of drilling and grouting engineering quantity calculation, but also can verify the rationality and accuracy of the drilling track, and has the advantages of high track design accuracy, simple operation, high efficiency and high visualization.

[0098] The above examples are the preferred embodiments of the present application, but the embodiments of the present application are not limited to the above examples, and any changes, modifications, substitutions, combinations, simplifications made without departing from the spirit and principles of the present application should be equivalent replacement methods, and are all included in the protection scope of the present application.

Claims

1. A 3DE platform-based three-dimensional design method for ground pre-grouting drilling trajectory, characterized in that, Comprise the following steps: S1) Design the tunnel (3) grouting section length, grouting hole arrangement parameters, find the appropriate ground position arrangement grouting drilling field; The arrangement parameters include grouting hole arrangement ring diameter, grouting hole number, the included angle between adjacent grouting holes, and grouting curtain thickness; The grouting curtain thickness needs to satisfy the following formula In the formula, B represents the grouting curtain thickness, D represents the grouting hole arrangement ring diameter, Alpha represents half of the included angle between adjacent grouting holes, R represents the maximum excavation radius of the tunnel, R represents the maximum excavation radius of the tunnel, B min represents the minimum grouting curtain thickness; r represents the single hole grouting diffusion diameter, S2) For a single ground pre-grouting borehole (1), the hole (1-1) position, grouting section target point (1-2) and grouting point (1-3) three-dimensional coordinates are drafted, the three-dimensional design software of directional drilling hole trajectory is used to design the three-dimensional design drawing of the vertical section, the build-in section and the grouting section of the single L-shaped ground pre-grouting borehole (1) trajectory in turn, and the length of each section and the total length of the drilling trajectory are read; S3) The full trajectory coordinates of each L-shaped ground pre-grouting borehole (1) designed are extracted and exported respectively, and the full trajectory coordinates include drilling trajectory control points (2); S4) In the modeling platform, according to the full trajectory coordinates of each L-shaped ground pre-grouting borehole (1), the trajectory model of each L-shaped ground pre-grouting borehole (1) is established; S5) In the modeling platform, the tunnel (3) model is established, and the tunnel (3) model includes the tunnel axis and the tunnel contour surface; S6) The trajectory model engineering drawing of each L-shaped ground pre-grouting borehole (1) and the tunnel (3) model engineering drawing are created, and the relative position relationship between the trajectory of each L-shaped ground pre-grouting borehole (1) and the tunnel (3) is displayed; S7) Whether the relative position relationship between the trajectory of each L-shaped ground pre-grouting borehole (1) and the tunnel (3) is correct is judged, if not, return to step S2) to recheck and determine the hole (1-1) position, grouting section target point (1-2) and grouting point (1-3) three-dimensional coordinates, and follow the subsequent steps; If correct, proceed to step S8); 2. The 3DE platform-based ground pre-grouting borehole trajectory three-dimensional design method according to claim 1, characterized in that: S8) In the modeling platform, the drawing is formed and saved, the design drawing is exported, and the engineering construction is guided.

3. The 3DE platform-based ground pre-grouting borehole trajectory three-dimensional design method according to claim 2, characterized in that: In S1), the range of unfavorable geological sections of the tunnel is determined according to the tunnel geological data analysis, and the length of the tunnel (3) grouting section is determined; The required grouting hole number is determined according to the required grouting curtain thickness and the single hole grouting diffusion diameter.

4. The 3DE platform-based ground pre-grouting borehole trajectory three-dimensional design method according to claim 1, characterized in that: In S2), the grouting section target point (1-2) and the grouting point (1-3) three-dimensional coordinates are written into a TXT file, the hole (1-1) three-dimensional coordinates of the ground pre-grouting borehole (1) are input into the directional drilling hole trajectory three-dimensional design software, the grouting section target point (1-2) and the grouting point (1-3) three-dimensional coordinates in the TXT file are imported into the directional drilling hole trajectory three-dimensional design software, and the vertical section, the build-in section and the grouting section of the L-shaped ground pre-grouting borehole (1) trajectory are designed in turn. In S4), the modeling platform is a 3DE platform.

5. The 3DE platform-based ground pre-grouting borehole trajectory three-dimensional design method according to claim 4, characterized in that: In S4, the steps of establishing the trajectory model of the L-shaped ground pre-grouting borehole (1) are as follows: opening the 3DE platform, creating a new 3D part drawing, and importing the full trajectory coordinates exported in step S3) into the 3DE platform in batches by using macro commands to generate a single L-shaped ground pre-grouting borehole (1) trajectory curve, wherein the L-shaped ground pre-grouting borehole (1) trajectory curve includes a borehole trajectory control point (2).

6. The 3DE platform-based ground pre-grouting borehole track three-dimensional design method according to claim 5, characterized in that: In S5, the steps of establishing the tunnel axis include determining the spatial coordinate points of the center positions of the starting point and the ending point of the grouting section tunnel, inputting the three-dimensional coordinates of the center positions of the starting point and the ending point of the grouting section tunnel in the 3DE platform to generate two points, and connecting the two points to establish a tunnel axis.

7. The 3DE platform-based ground pre-grouting borehole track three-dimensional design method according to claim 6, characterized in that: In S5, the steps of establishing the tunnel contour surface include determining the excavation size of the tunnel, establishing a plane perpendicular to the tunnel axis according to the center coordinates of the starting point of the grouting section tunnel, drawing a tunnel excavation contour line on the plane with the tunnel center point as a reference, and sweeping the tunnel excavation contour line along the tunnel axis to generate a tunnel contour surface.

8. The 3DE platform-based ground pre-grouting borehole track three-dimensional design method according to claim 7, characterized in that: In S5, the tunnel excavation contour line includes a circular shape, a rectangular shape, and a city gate shape.

9. The 3DE platform-based ground pre-grouting borehole track three-dimensional design method according to claim 1, characterized in that: In S6, the engineering drawings include an isometric view, a plan view, a longitudinal section view, and a cross-sectional view.

10. The 3DE platform-based ground pre-grouting borehole trajectory three-dimensional design method according to claim 1, characterized in that: In S7, the method of judging whether the relative position relationship between each L-shaped ground pre-grouting borehole (1) trajectory and the tunnel (3) is correct is as follows: on the grouting section cross section of the ground pre-grouting borehole (1) and the tunnel (3) model, measuring the distance between each ground pre-grouting borehole (1) and the tunnel (3) center and the included angle between adjacent ground pre-grouting boreholes (1), and if the measured value is within the allowable error range of the design value in step S1), the spatial position relationship between each L-shaped ground pre-grouting borehole (1) trajectory and the tunnel (3) is correct.

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