Blocking method for seepage crude oil in shale stratum excavation of high-speed railway tunnel

Abstract

The invention relates to the technical field of tunnel construction, in particular to a plugging method for seepage crude oil in shale stratum excavation of a high-speed railway tunnel, which comprises the steps of constructing a steel frame cover arch, collecting crude oil, grouting and plugging, plugging an oil seepage position by a self-adhesive tape, performing waterproof construction and performing secondary lining. And grouting is conducted through the long grouting pipe and the short grouting pipe, and the advantages that the length is combined, the advantages are complementary, and the grouting plugging effect is better can be achieved. Therefore, the plugging method for the seepage crude oil during excavation of the shale stratum of the high-speed railway tunnel can improve the effect of plugging the seepage of the crude oil, reduce the risk of oil seepage during later operation, guarantee the safety of line operation and protect the environment. Due to the fact that the long and short hole grouting and self-adhesive tape plugging construction method is adopted, the construction period is short, the construction safety risk is small, the plugging effect is good, the influence on later operation is small, and remarkable ecological benefits, safety benefits and social benefits are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of tunnel construction, and particularly to a method for plugging seepage crude oil during the excavation of shale strata in high-speed railway tunnels. Background Art

[0002] In recent years, the construction of high-speed railways has been booming, and the geological conditions of tunnels in different regions are complex and diverse. In water-rich areas, there are more cases of water seepage and gushing, and generally, a method of "combining drainage and plugging, with plugging as the main" is adopted by coordinating grouting water plugging and drainage systems. During the excavation of tunnel shale strata, if the phenomenon of seepage crude oil occurs on the heading face and the primary support, the viscosity of the crude oil is high, and it cannot be discharged through the tunnel drainage system in the later stage, and it is easy to cause blockage of the drainage system, pollute the environment, and has a certain flammability, affecting the later operation safety. Therefore, effective plugging must be carried out. At present, during the tunnel construction in China, the phenomenon of seepage crude oil on the construction surface is very rare, lacking similar disposal experience and measures, and relevant technical gaps need to be filled. Summary of the Invention

[0003] The purpose of the present invention is to provide a method for plugging seepage crude oil during the excavation of shale strata in high-speed railway tunnels. The plugging method has a short construction period, less investment in labor costs and equipment rental fees, greatly reduces the construction cost, and has a significant effect on plugging crude oil, reducing the risk of oil seepage in the later operation, and has significant ecological, safety and social benefits.

[0004] To achieve the above object of the invention, the technical solution adopted by the present invention is as follows:

[0005] The present invention provides a method for plugging seepage crude oil during the excavation of shale strata in high-speed railway tunnels, including the following steps:

[0006] S1. Install a steel arch: Install a steel arch on the primary support surface of the oil seepage section in the tunnel;

[0007] S2. Collect crude oil: Set a drainage pipe at the oil seepage point on the primary support surface, and a collection bucket is arranged at the other end of the drainage pipe to collect the seepage crude oil;

[0008] S3. Grout and plug: Drill a number of long grouting holes and short grouting holes on the primary support surface of the oil seepage section. The long grouting holes and short grouting holes are arranged in an alternating array, and then long grouting pipes and short grouting pipes are buried in the long grouting holes and short grouting holes respectively, and then the grouting material is grouted through the long grouting pipes and short grouting pipes;

[0009] Among them, in the present application, long grouting holes and short grouting holes are drilled, and long grouting pipes and short grouting pipes are respectively buried for grouting. Among them, the slurry grouted through the long grouting holes can penetrate into cracks or pores at a relatively long distance under the action of pressure, and has a good filling and cementing effect on large and interconnected geological defects. When grouting through the short grouting holes, due to the relatively small hole spacing, a relatively high grouting pressure is formed in the local area, which is more conducive to filling tiny cracks and voids and improving the local density. Therefore, grouting through the long grouting pipe and the short grouting pipe simultaneously can achieve the advantages of combining the long and the short, complementing each other's advantages, and having a better grouting plugging effect.

[0010] S4. Seal the oil leakage area with self-adhesive tape: Grind the periphery of the oil leakage area, clean it, apply structural adhesive to the periphery of the oil leakage area, and then seal the oil leakage area with self-adhesive tape;

[0011] S5. Waterproof construction: After completing the sealing of the oil leakage area, remove the steel frame arch, and then perform waterproof construction on the primary support surface to form a waterproof layer;

[0012] S6. Secondary lining: After completing the waterproof construction, pour the secondary lining on the waterproof layer.

[0013] Further, in step S1, the steel frame arch includes a plurality of arc-shaped steel frames arranged in an array on the primary support surface, connecting steel bars arranged in an array and longitudinally connected to the arc-shaped steel frames, short side wall bases arranged at the bottoms on both sides of the primary support surface, and anchor bars arranged on the short side wall bases;

[0014] The arc-shaped steel frame is in contact with the short side wall base, and the anchor bar is fixedly welded to the arc-shaped steel frame.

[0015] Further, the arc-shaped steel frame is formed by connecting a plurality of arc-shaped I-beam steel frame segments to each other, and adjacent two arc-shaped I-beam steel frame segments are fixedly connected by bolts; and / or

[0016] The distance between adjacent two arc-shaped steel frames is set to be 0.8 m to 1.2 m; and / or

[0017] The distance between adjacent two connecting steel bars is set to be 0.9 m to 1.1 m.

[0018] Further, in step S1, four anchor bars are provided and are respectively arranged at the four sides of the short side wall base, and a steel plate is laid on the short side wall base, and the four anchor bars are clamped to fix the steel plate;

[0019] The arc-shaped steel frame is in contact with the steel plate.

[0020] Among them, laying steel plates on the low side wall foundation can well disperse the stress of the steel frame arch lining on the low side wall foundation, thereby reducing stress concentration.

[0021] Further, in step S3, the circumferential spacing between adjacent long grouting holes and short grouting holes is 140 cm to 160 cm, and the longitudinal spacing is 210 cm to 230 cm; and / or

[0022] The long grouting holes and short grouting holes are drilled with pneumatic drills, and the diameters of the long grouting holes and short grouting holes are 50 mm.

[0023] Further, in step S3, the length of the long grouting pipe is 6 m, and the length of the short grouting pipe is 4 m.

[0024] Further, in step S3, the grouting material is cement slurry, and the water-cement ratio of the cement slurry is 1:1; and / or

[0025] The cement is ordinary Portland cement; and / or

[0026] The grouting pressure is 1.5 MPa to 2 MPa; and / or

[0027] The grouting method adopts hole-by-hole grouting, and the grouting sequence is from bottom to top. Among them, the grouting method of adopting hole-by-hole grouting means that first grout on both sides, and after the slurry on both sides is strengthened, then grout the middle part, which can make the slurry form more stable. In addition, the grouting sequence from bottom to top is to grout the lower part first, so that after the lower part is strengthened, then grout the upper part to avoid the situation that the slurry is easy to flow away.

[0028] Further, in step S4, before grinding the periphery of the oil seepage area, first plaster the oil seepage area, and after observing that there is no oil seepage in the oil seepage area, then grind the periphery of the oil seepage area; and / or

[0029] The grinding range is 8 cm to 12 cm outside the edge of the oil seepage area; after grinding, clean and wipe the oil stain at the grinding position.

[0030] Further, in step S4, the method of using self-adhesive tape to block the oil seepage area is as follows: first, fit the first layer of self-adhesive tape with the primary support surface, use a rubber hammer to hammer the first layer of self-adhesive tape to make the first layer of self-adhesive tape closely adhere to the primary support surface, and perform manual pressing for 8 min to 12 min, and then use the second layer of self-adhesive tape to cover and paste on the surface of the first layer of self-adhesive tape;

[0031] The size of the second layer of self-adhesive tape is 18 cm to 22 cm larger than the size of the first layer of self-adhesive tape;

[0032] The size of the first layer of self-adhesive tape is 8 cm to 12 cm larger than the size of the oil seepage area.

[0033] Further, after the second layer of self-adhesive tape is covered and pasted, spread and level the second layer of self-adhesive tape so that it combines with the applied structural adhesive. After pressing, use a rubber hammer to tap once from the center of the second layer of self-adhesive tape to the surrounding area, then tap again from the surrounding area of the second layer of self-adhesive tape to the center, and finally tap once more from the center of the second layer of self-adhesive tape to the surrounding area, so that both the first layer of self-adhesive tape and the second layer of self-adhesive tape are closely attached to the primary support surface. Then, process other oil seepage areas in turn and then conduct observation; and / or

[0034] Observe the oil output situation of the primary support surface, observe 3 times a day for 3 to 5 days. If there is no oil output, the next waterproof construction process can be entered.

[0035] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0036] (1) The method for plugging seepage crude oil in the shale formation excavation of high-speed railway tunnels of the present invention includes steps of constructing a steel arch set, collecting crude oil, grouting and plugging, plugging oil seepage areas with self-adhesive tape, waterproof construction and secondary lining, and grouting through long grouting pipes and short grouting pipes, which can achieve the combination of long and short, complementary advantages, and better grouting and plugging effects. Therefore, the method for plugging seepage crude oil in the shale formation excavation of high-speed railway tunnels can improve the effect of plugging crude oil leakage, reduce the risk of oil seepage during later operation, and ensure the safe operation of the line.

[0037] (2) The method for plugging seepage crude oil in the shale formation excavation of high-speed railway tunnels of the present invention, due to the implementation of the collection, storage and later treatment of seepage crude oil, the seepage crude oil is collected and then subjected to unified environmental protection treatment, eliminating the pollution of the environment by the exuded crude oil, and having good ecological benefits.

[0038] (3) The method for plugging seepage crude oil in the shale formation excavation of high-speed railway tunnels of the present invention, due to the use of a steel arch set to reinforce the primary support surface of the oil seepage section, the tunnel face in front can continue to be excavated and advanced without being restricted by the construction safety step distance. At the same time, it can provide sufficient crude oil seepage time, enabling the crude oil accumulated in the surrounding rock formation to be fully released, and eliminating the risk of crude oil seepage during later operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0040] Figure 1 It is a schematic structural diagram of constructing a steel arch set on the primary support surface of the oil seepage section in the tunnel of the present invention.

[0041] Figure 2 is Figure 1 A partial detailed structural schematic diagram at location A in

[0042] Figure 3 is Figure 1 A partial enlarged structural schematic diagram at location B in

[0043] Figure 4 is a structural schematic diagram of the longitudinal connection between the arc-shaped steel frame and the connecting steel bars in the steel frame arch lining of the present invention.

[0044] Figure 5 is a radial cross-sectional structural schematic diagram of the arch wall after grouting reinforcement in the oil seepage section of the tunnel of the present invention.

[0045] Figure 6 is a structural schematic diagram of using self-adhesive tape to block the oil seepage point of the present invention.

[0046] Figure 7 is a structural schematic diagram of using self-adhesive tape to block the oil seepage area of the present invention.

[0047] Reference numerals:

[0048] Initial support surface 1;

[0049] Steel frame arch lining 2, arc-shaped steel frame 21, connecting steel bars 22, low side wall foundation 23, arc-shaped I-beam steel frame segment 211, bolts 212;

[0050] Long grouting pipe 3, first annular reinforcement ring 31;

[0051] Short grouting pipe 4, second annular reinforcement ring 32;

[0052] First layer of self-adhesive tape 5;

[0053] Second layer of self-adhesive tape 6;

[0054] Oil seepage point 7;

[0055] Oil seepage zone 8;

[0056] Secondary lining 9;

[0057] Structural adhesive 10. Specific embodiments

[0058] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer and more understandable, the following further details the present invention in combination with embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0059] The terms used in the embodiments of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. In the present invention, the singular forms "a", "the", and "said" used in the embodiments and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0060] The following is an illustration in conjunction with specific embodiments.

[0061] Embodiment 1

[0062] For the method of plugging seepage crude oil in the shale formation excavation of a high - speed railway tunnel in this embodiment, please refer to Figures 1 to 7 , including the following steps:

[0063] S1. Install the steel arch set: Install the steel arch set 2 on the initial support surface 1 of the oil - seeping section in the tunnel; wherein, the initial support surface 1 is formed by concrete.

[0064] Among them, as Figures 1 to 4 shown, the steel arch set 2 includes seven arc - shaped steel frames 21 arranged in an array on the initial support surface 1, connecting steel bars 22 arranged in an array longitudinally connected to the arc - shaped steel frames 21, short - side wall bases 23 arranged at the two bottom sides of the initial support surface 1, and anchor bars arranged on the short - side wall bases 23; the arc - shaped steel frames 21 are in contact with the short - side wall bases 23, and the anchor bars are welded and fixed to the arc - shaped steel frames. Among them, four anchor bars with a diameter of ￠28mm are set by drilling at the four sides of the short - side wall base 23, and the arc - shaped steel frames 21 at the four sides are welded and fixed to the anchor bars.

[0065] Among them, the arc - shaped steel frame 21 is formed by connecting several arc - shaped I - shaped steel frame segments 211 to each other, and two adjacent arc - shaped I - shaped steel frame segments 211 are fixedly connected by bolts 212. In this embodiment, the distance between two adjacent arc - shaped steel frames 21 is set to 1.0m; the distance between two adjacent connecting steel bars is set to 1.0m.

[0066] In this embodiment, a steel plate is laid on the short - side wall base 23, and four anchor bars are clamped and fixed to the steel plate; the arc - shaped steel frame is in contact with the steel plate. This steel plate can well disperse the stress of the steel arch set on the short - side wall base, thereby reducing stress concentration.

[0067] S2. Collect crude oil: Set a drainage pipe at the oil - seeping place of the initial support surface 1, and a collection bucket is arranged at the other end of the drainage pipe to collect the seepage crude oil;

[0068] S3. Grout plugging: As Figure 5As shown in the figure, a number of long grouting holes and short grouting holes are drilled on the initial support surface 1 of the oil seepage section. The long grouting holes and short grouting holes are arranged in an alternating array. Then, long grouting pipes 3 and short grouting pipes 4 are buried in the long grouting holes and short grouting holes respectively. Then, the grouting material is grouted through the long grouting pipes 3 and short grouting pipes 4. In this embodiment, the circumferential spacing between adjacent long grouting holes and short grouting holes is 150 cm, and the longitudinal spacing is 220 cm. The long grouting holes and short grouting holes are drilled with a pneumatic drill, and the diameters of the long grouting holes and short grouting holes are 50 mm. In this embodiment, the length of the long grouting pipe 3 is 6 m, and the length of the short grouting pipe 4 is 4 m. Among them, a first annular reinforcement ring 31 will be formed after the long grouting pipe 3 is grouted, and a second annular reinforcement ring 41 will be formed after the short grouting pipe 4 is grouted.

[0069] In this embodiment, the grouting material is cement slurry, and the water-cement ratio of the cement slurry is 1:1. The cement is ordinary Portland cement. The grouting pressure is 1.5 MPa to 2 MPa. The grouting method is to grout at alternate holes, and the grouting sequence is from bottom to top. Among them, the grouting method of grouting at alternate holes means that first grout on both sides. After the slurry on both sides is solidified, then grout the middle part, which can make the slurry form more firmly. In addition, the grouting sequence from bottom to top is to grout the lower part first. After the lower part is solidified, then grout the upper part to avoid the situation that the slurry is easy to flow away.

[0070] S4. Seal the oil seepage area with self-adhesive tape: Polish the periphery of the oil seepage area, and after cleaning, apply structural adhesive around the oil seepage area, and then seal the oil seepage area with self-adhesive tape. Among them, before polishing the periphery of the oil seepage area, first plaster the oil seepage area. After observing that there is no large amount of oil seepage in the oil seepage area, then polish the periphery of the oil seepage area. In this embodiment, the polishing range is 10 cm outside the edge of the oil seepage area. After polishing, clean and wipe off the oil stain at the polishing position.

[0071] In this embodiment, as Figure 6 and Figure 7 shown, the method of sealing the oil seepage area with self-adhesive tape is as follows: First, the first layer of self-adhesive tape 5 is attached to the initial support surface 1, and the first layer of self-adhesive tape 5 is hammered with a rubber hammer to make the first layer of self-adhesive tape 5 closely attached to the initial support surface 1. After manual pressing for 10 minutes, then the second layer of self-adhesive tape 6 is covered and pasted on the surface of the first layer of self-adhesive tape 5. The size of the second layer of self-adhesive tape 6 is 20 cm larger than the size of the first layer of self-adhesive tape 5. The size of the first layer of self-adhesive tape 5 is 10 cm larger than the size of the oil seepage area. Among them, as Figure 5 shown, the oil seepage area is the oil seepage point 7. As Figure 6 shown, the oil seepage area is the oil seepage belt 8.

[0072] After the second layer of self-adhesive tape 6 is covered and pasted, the second layer of self-adhesive tape 6 is spread and leveled so that it combines with the applied structural adhesive 10. After pressing, use a rubber hammer to tap from the center of the second layer of self-adhesive tape 6 to the surrounding area once, then tap from the surrounding area of the second layer of self-adhesive tape 6 to the center again, and finally tap from the center of the second layer of self-adhesive tape 6 to the surrounding area once more, so that both the first layer of self-adhesive tape 5 and the second layer of self-adhesive tape 6 are closely attached to the primary support surface 1. Then, deal with other oil seepage areas in sequence and then conduct observation. Among them, observe the oil output situation of the primary support surface 1, observe 3 times a day for 3 days. If there is no oil output situation, the next waterproof construction process can be entered.

[0073] S5. Waterproof construction: After the oil seepage areas are blocked, remove the steel frame arch sleeve 2, and then conduct waterproof construction on the primary support surface 1 to form a waterproof layer; in this embodiment, the waterproof layer is a 1.5-mm EVA waterproof board. Among them, EVA is ethylene-vinyl acetate copolymer.

[0074] S6. Secondary lining: After the waterproof construction is completed, pour the secondary lining 9 on the waterproof layer. Among them, the secondary lining 9 is formed by reinforced concrete.

[0075] Embodiment 2

[0076] A method for plugging seepage crude oil in the shale formation excavation of a high-speed railway tunnel. The difference between this embodiment and Embodiment 1 is that in step S1 of this embodiment, the distance between two adjacent arc-shaped steel frames 21 is set to 0.8 m; the distance between two adjacent connecting steel bars is set to 0.9 m; in step S3 of this embodiment, the circumferential distance between adjacent long grouting holes and short grouting holes is 140 cm, and the longitudinal distance is 210 cm. The remaining process steps of this embodiment are the same as those of Embodiment 1.

[0077] Embodiment 3

[0078] A method for plugging seepage crude oil in the shale formation excavation of a high-speed railway tunnel. The difference between this embodiment and Embodiment 1 is that in step S1 of this embodiment, the distance between two adjacent arc-shaped steel frames 21 is set to 1.2 m; the distance between two adjacent connecting steel bars is set to 1.1 m; in step S3 of this embodiment, the circumferential distance between adjacent long grouting holes and short grouting holes is 160 cm, and the longitudinal distance is 230 cm. The remaining process steps of this embodiment are the same as those of Embodiment 1.

[0079] Embodiment 4

[0080] Sealing method for seepage crude oil during excavation of shale formation in high-speed railway tunnel. The difference between this embodiment and Embodiment 1 is that in step S4 of this embodiment, the grinding range is 8 cm outside the edge of the oil seepage area; the method of sealing the oil seepage area with self-adhesive tape is as follows: First, the first layer of self-adhesive tape 5 is attached to the primary support surface 1, and a rubber hammer is used to hammer the first layer of self-adhesive tape 5 to make the first layer of self-adhesive tape 5 closely adhere to the primary support surface 1. After manual pressing for 8 minutes, the second layer of self-adhesive tape 6 is then covered and pasted on the surface of the first layer of self-adhesive tape 5; the size of the second layer of self-adhesive tape 6 is 18 cm larger than the size of the first layer of self-adhesive tape 5; the size of the first layer of self-adhesive tape 5 is 8 cm larger than the size of the oil seepage area; Observe the oil output situation of the primary support surface 1, observe 3 times a day for 4 days. If there is no oil output situation, the next waterproof construction process can be entered. The remaining process steps of this embodiment are the same as those of Embodiment 1.

[0081] Embodiment 5

[0082] Sealing method for seepage crude oil during excavation of shale formation in high-speed railway tunnel. The difference between this embodiment and Embodiment 1 is that in step S4 of this embodiment, the grinding range is 12 cm outside the edge of the oil seepage area; the method of sealing the oil seepage area with self-adhesive tape is as follows: First, the first layer of self-adhesive tape 5 is attached to the primary support surface 1, and a rubber hammer is used to hammer the first layer of self-adhesive tape 5 to make the first layer of self-adhesive tape 5 closely adhere to the primary support surface 1. After manual pressing for 12 minutes, the second layer of self-adhesive tape 6 is then covered and pasted on the surface of the first layer of self-adhesive tape 5; the size of the second layer of self-adhesive tape 6 is 22 cm larger than the size of the first layer of self-adhesive tape 5; the size of the first layer of self-adhesive tape 5 is 12 cm larger than the size of the oil seepage area; Observe the oil output situation of the primary support surface 1, observe 3 times a day for 5 days. If there is no oil output situation, the next waterproof construction process can be entered. The remaining process steps of this embodiment are the same as those of Embodiment 1.

[0083] The above are only the preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A method for blocking crude oil seepage in shale strata excavation in high-speed railway tunnels, characterized in that: The following steps are involved: S1. Construction of steel frame arch: Construction of steel frame arch on the initial support surface of the oil seepage section in the tunnel; S2. Collecting crude oil: a drainage pipe is provided at the oil seepage location of the initial support surface, and a collection bucket is provided at the other end of the drainage pipe to collect the seeping crude oil; S3, grouting plugging: drilling a number of long grouting holes and short grouting holes on the initial support surface of the oil seepage section, the long grouting holes and the short grouting holes are arranged in an alternating array, and then long grouting pipes and short grouting pipes are buried in the long grouting holes and the short grouting holes respectively, and then grouting materials are grouted through the long grouting pipes and the short grouting pipes; S4. Use self-adhesive tape to seal the oil leakage: polish the area around the oil leakage, clean it, apply structural glue around the oil leakage, and then use self-adhesive tape to seal the oil leakage; S5, waterproof construction: after the oil seepage is sealed, the steel frame arch is removed, and then waterproof construction is performed on the initial support surface to form a waterproof layer; S6. Secondary lining: After completing the waterproof construction, pour the secondary lining on the waterproof layer.

2. The method for blocking crude oil seepage in shale strata excavation in high-speed railway tunnels according to claim 1, characterized in that: In step S1, the steel frame arch includes a plurality of arc-shaped steel frames arranged in an array on the initial support surface, connecting steel bars arranged in an array and longitudinally connected to the arc-shaped steel frames, short side wall foundations arranged at the bottom of both sides of the initial support surface, and anchor bars arranged at the short side wall foundations; The arc-shaped steel frame is in contact with the short side wall foundation, and the anchoring bars are fixed to the arc-shaped steel frame by welding.

3. The method for blocking crude oil seepage in shale strata excavation in high-speed railway tunnels according to claim 2, characterized in that: The arc-shaped steel frame is formed by connecting a plurality of arc-shaped I-shaped steel frame segments to each other, and two adjacent arc-shaped I-shaped steel frame segments are fixedly connected by bolts; and / or The distance between two adjacent arc-shaped steel frames is set to 0.8m to 1.2m; and / or The distance between two adjacent connecting steel bars is set to 0.9m to 1.1m.

4. The method for blocking crude oil seepage in shale strata excavation in high-speed railway tunnels according to claim 1, characterized in that: In step S1, four anchor bars are provided and are respectively provided at four sides of the short side wall foundation, and a steel plate is placed on the short side wall foundation, and the four anchor bars are clamped and fixed to the steel plate; The arc-shaped steel frame contacts the steel plate.

5. The method for blocking crude oil seepage in shale strata excavation in high-speed railway tunnels according to claim 1, characterized in that: In step S3, the circumferential spacing between the adjacent long grouting holes and the short grouting holes is 140 cm to 160 cm, and the longitudinal spacing is 210 cm to 230 cm; and / or The long grouting holes and the short grouting holes are drilled by a pneumatic drilling rig, and the diameter of the long grouting holes and the short grouting holes is 50 mm.

6. The method for blocking crude oil seepage in shale strata excavation in high-speed railway tunnels according to claim 1, characterized in that: In step S3, the length of the long grouting pipe is 6 m, and the length of the short grouting pipe is 4 m.

7. The method for blocking crude oil seepage in shale formation excavation in a high-speed railway tunnel as claimed in claim 1, characterized in that: In step S3, the grouting material is cement slurry, and the water-cement ratio of the cement slurry is 1:1; and / or The cement is ordinary Portland cement; and / or The grouting pressure is 1.5MPa to 2MPa; and / or The grouting method adopts inter-hole grouting, and the grouting sequence is from bottom to top.

8. The method for blocking crude oil seepage in shale formation excavation in a high-speed railway tunnel as claimed in claim 1, characterized in that: In step S4, before polishing the periphery of the oil leakage area, firstly plaster the oil leakage area, observe that there is no oil leakage at the oil leakage area, and then polish the periphery of the oil leakage area; and / or The grinding range is 8cm to 12cm outside the edge of the oil seepage area; after the grinding is completed, clean and wipe off the oil stains on the grinding position.

9. The method for blocking crude oil seepage in shale strata excavation in high-speed railway tunnels according to claim 1, characterized in that: In step S4, the method of using the self-adhesive tape to seal the oil leakage is as follows: firstly, a first layer of the self-adhesive tape is bonded to the initial support surface, and the first layer of the self-adhesive tape is hammered with a rubber hammer to make the first layer of the self-adhesive tape closely bonded to the initial support surface, and after manual pressing for 8 minutes to 12 minutes, a second layer of the self-adhesive tape is used to cover and bond the surface of the first layer of the self-adhesive tape; The size of the second layer of self-adhesive tape is 18 cm to 22 cm larger than the size of the first layer of self-adhesive tape; The size of the first layer of self-adhesive tape is 8 cm to 12 cm larger than the size of the oil seepage area.

10. The method for blocking crude oil seepage in shale strata excavation in high-speed railway tunnels according to claim 9, characterized in that: After the second layer of self-adhesive tape is covered and pasted, the second layer of self-adhesive tape is spread and leveled to make it combine with the applied structural adhesive. After compacting, use a rubber hammer to knock from the center of the second layer of self-adhesive tape to the surroundings, then knock from the surroundings of the second layer of self-adhesive tape to the center again, and finally knock from the center of the second layer of self-adhesive tape to the surroundings, so that the first layer of self-adhesive tape and the second layer of self-adhesive tape are both tightly attached to the initial support surface, and then treat other oil seepage areas in turn and observe again; and / or Observe the oil leakage of the initial support surface 3 times a day for 3 to 5 days. If there is no oil leakage, proceed to the next waterproofing construction process.

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