Inclined Anti-Sliding Pile Breaking and Entering Tunnel Support System and Construction Method in Mountain Tunnels

Abstract

The present invention discloses a mountain tunnel breaking-in support system for skew anti-slide piles and a construction method. The mountain tunnel breaking-in support system for skew anti-slide piles includes: at least one first anti-slide pile and at least one second anti-slide pile, the first anti-slide pile and the second anti-slide pile are buried in the rock and soil to form an anti-slide structure; a tunnel, the second anti-slide pile is partially broken and the tunnel passes through the second anti-slide pile from the partially broken part; a support body and at least two support piles, the support body is higher than the tunnel, each support pile supports the support body from both sides of the tunnel, and the support body and the support piles are buried in the rock and soil to form an anti-slide structure. Beneficial effects: The support piles and the support body can provide a synergistic effect in terms of anti-slide for the partial breaking of the second anti-slide pile, forming a superimposed anti-slide structure, and on the basis of reinforcement and treatment, also serving as the support structure of the tunnel; the force mechanism of the support body and the support piles is clear, the spatial stiffness is large, the deformation is controllable, the operation and implementation are convenient, and the support effect is good.

Description

Technical Field

[0001] The present invention relates to the technology of mountain tunnel support structures, and particularly to a support system and construction method for a mountain tunnel to enter a cave by breaking an inclined anti-slide pile Background Art

[0002] With the rapid development of various types of transportation, the conditions for tunnel construction have become increasingly complex. When constructing a mountain tunnel at a high and steep slope, it is necessary to break through the existing slope retaining structure to enter the cave, which results in the failure of the local anti-slide structure and affects the stability of the original mountain slope

[0003] In order to ensure the stability of the slope at the entrance position of the tunnel, it is necessary to set up a conversion system to bear the load borne by the structure to be broken, and to ensure the overall stability of the newly built tunnel. However, due to the extremely complex mechanical behavior characteristics of the existing slope anti-slide structure and the newly built conversion structure themselves, as well as their interaction characteristics, it is difficult to accurately evaluate the mechanical behavior of the existing anti-slide structure, slope and newly built structure during the tunnel excavation process. So far, a reasonable and feasible plan for a mountain tunnel to enter the cave by breaking through the existing anti-slide structure has not been formed

[0004] Therefore, for a mountain tunnel to break through the slope retaining structure and enter the cave under complex conditions, formulating a reasonable, feasible, safe and stable load-bearing conversion system, overcoming the technical problems existing in the tunnel entrance to break through the existing anti-slide structure, and ensuring the safety and stability of the newly built tunnel and slope have very important practical engineering significance

[0005] In the prior art, when it is necessary to build a mountain tunnel near the anti-slide structure in order to maintain the stability of the existing anti-slide structure of the mountain slope, usually the mountain tunnel can only avoid the existing anti-slide structure. The technical defect is that the newly built mountain tunnel needs to avoid the existing anti-slide structure, which will cause the route of the mountain tunnel to be extended and the construction cost to increase Summary of the Invention

[0006] The purpose of the present invention is to solve at least one of the technical problems existing in the prior art, and provide a support system and construction method for a mountain tunnel to enter a cave by breaking an inclined anti-slide pile, which can enable the mountain tunnel to pass through the existing anti-slide structure

[0007] The technical solution adopted to solve the above technical problems is as follows

[0008] The support system for a mountain tunnel to enter a cave by breaking an inclined anti-slide pile includes

[0009] At least one first anti-slide pile and at least one second anti-slide pile, the first anti-slide pile and the second anti-slide pile are buried in the rock and soil to form an anti-slide structure

[0010] A tunnel, the second anti-slide pile is partially broken and the tunnel passes through the second anti-slide pile from the partially broken part

[0011] A support body and at least two support piles, the support body is higher than the tunnel, and each support pile supports the support body from both sides of the tunnel. The support body and the support piles are buried in the rock and soil to form an anti-sliding structure.

[0012] The above-mentioned mountain tunnel breaking oblique anti-sliding pile and entering the hole retaining system has at least the following beneficial effects:

[0013] The support piles and the support body can provide a synergistic effect in anti-sliding for the partial breaking of the second anti-sliding pile, forming a laminated anti-sliding structure. On the basis of reinforcement and treatment, it also serves as the support structure of the tunnel; the stress mechanism of the support body and the support piles is clear, the spatial stiffness is large, the deformation is controllable, the operation and implementation are convenient, and the support effect is good; the support body and the support piles can form a passive support structure, and combined with the existing first anti-sliding pile, they can give full play to the bearing capacity, and can meet the requirements of strength and stability for the new tunnel to break the oblique anti-sliding pile; the support piles and the support body can replace the second anti-sliding pile to form a new anti-sliding structure, so that the anti-sliding performance of the new anti-sliding structure is not weaker than the anti-sliding structure formed by the original first anti-sliding pile and the second anti-sliding pile, so that the tunnel can pass through the second anti-sliding pile safely and reliably.

[0014] In a possible implementation manner, the support body is a lattice box body, and at least one sunken cavity is provided on the support body, and the cavity is filled with backfill soil. The lattice box body structure of the support body makes its own weight lighter and the structural strength higher. Combined with the backfill soil, it can provide reliable support performance.

[0015] In a possible implementation manner, the support body is a cast-in-place reinforced concrete structure. The support body adopts a cast-in-place reinforced concrete structure, which can reduce the transportation difficulty and realize local material taking at the construction site, which is beneficial to reducing the construction cost.

[0016] In a possible implementation manner, the support pile is a cast-in-place reinforced concrete pile. Selecting a cast-in-place reinforced concrete pile for the support pile can reduce the transportation difficulty and realize local material taking at the construction site, which is beneficial to reducing the construction cost.

[0017] In a possible implementation manner, each support pile is parallel to each other and is arranged in an array along both sides of the tunnel, and one end of the support pile is embedded in the support body. The support piles are arranged in an array on both sides of the tunnel within a certain range, which can strengthen the stability of the anti-sliding system. One end of the support pile is embedded in the support body, which can strengthen the bearing capacity of the anti-sliding system.

[0018] In a possible implementation manner, the edge of the support body is in contact with the first anti-sliding pile and the second anti-sliding pile. The close arrangement between the edge of the support body and the first anti-sliding pile or the second anti-sliding pile is beneficial to strengthening the reliability of the anti-sliding system.

[0019] In a possible implementation, the support system for the mountain tunnel to break through the skewed anti-slide pile and enter the tunnel also includes a protective arch, a sleeve arch, and pipe-roofing. The sleeve arch is a reinforced concrete structure with holes. The sleeve arch is arranged between the support body and the tunnel, and the included angle between the sleeve arch and the tunnel is greater than 0. One side of the sleeve arch is connected to the protective arch, and the pipe-roofing passes through the reserved holes inside the sleeve arch. The protective arch, sleeve arch, and pipe-roofing can form a reliable support structure above the tunnel, which is beneficial to the safe construction of the tunnel and can enhance the structural stability of the tunnel.

[0020] In a possible implementation, the protective arch is a reinforced concrete structure. The protective arch is arranged between the support body and the tunnel, and the included angle between the protective arch and the tunnel is greater than 0.

[0021] The construction method of the support system for the mountain tunnel to break through the skewed anti-slide pile and enter the tunnel includes the following steps:

[0022] Construction of the support piles, setting support piles in the rock mass;

[0023] Construction of the support body, setting a support body on the support piles so that one end of the support piles is fixedly connected to the support body;

[0024] Excavation of the open-cut section of the tunnel, installing steel arch frames, and pouring the tunnel structure;

[0025] Construction of the sleeve arch, setting a sleeve arch between the tunnel and the support body;

[0026] Construction of the protective arch, setting a protective arch between the tunnel and the support body and arranging the protective arch adjacent to the sleeve arch;

[0027] Construction of the pipe-roofing, driving the pipe-roofing into the rock and soil and making the pipe-roofing pass through the reserved holes of the sleeve arch and the protective arch;

[0028] Construction of the mined section of the tunnel, locally breaking the second anti-slide pile and implementing shotcrete support, pouring the tunnel structure and making the tunnel pass through the second anti-slide pile.

[0029] The above construction method of the support system for the mountain tunnel to break through the skewed anti-slide pile and enter the tunnel has at least the following beneficial effects:

[0030] First, construct the support piles and the support body, then carry out the excavation of the open-cut section of the tunnel, and then set the sleeve arch, protective arch, and pipe-roofing. A reliable support system can be constructed before the local breaking of the second anti-slide pile, strengthening the reliability of the original anti-slide structure. Then, locally break the second anti-slide pile, and finally carry out the construction of the mined section of the tunnel, which can ensure that the anti-slide structure always maintains a high safety factor, so that the tunnel can safely pass through the second anti-slide pile.

[0031] In a possible implementation manner, before the step of constructing the retaining piles, acoustic pipes for ultrasonic testing are pre-embedded in each retaining pile. The acoustic pipes are Q235B testing pipes, which are arranged inside the steel reinforcement cages. The bottoms of the acoustic pipes are sealed and welded with steel plates, and the pipe orifices of the acoustic pipes are covered. The concrete age of the retaining piles is greater than 14 days. The acoustic pipes can be used for ultrasonic testing, which can ensure the reliability of the retaining piles. Description of the Drawings

[0032] The above and / or additional aspects and advantages of the present invention will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, in which:

[0033] Figure 1 is a schematic structural diagram of the inclined anti-sliding pile breaking and entering the tunnel supporting system for mountain tunnels according to an embodiment of the present invention;

[0034] Figure 2 is a schematic diagram of the inclined anti-sliding pile breaking and entering the tunnel supporting system for mountain tunnels according to an embodiment of the present invention after removing the rock and soil;

[0035] Figure 3 is a schematic diagram of the layout of the support body and the retaining piles according to an embodiment of the present invention;

[0036] Figure 4 is a schematic diagram of the layout of the first anti-sliding pile and the second anti-sliding pile according to an embodiment of the present invention;

[0037] Figure 5 is a schematic diagram of the layout of the tunnel, the first anti-sliding pile, the second anti-sliding pile, the protective arch and the pipe shed according to an embodiment of the present invention;

[0038] Figure 6 is a schematic diagram of the layout of the tunnel, the first anti-sliding pile, the second anti-sliding pile and the retaining piles according to an embodiment of the present invention;

[0039] Figure 7 is a schematic diagram of the layout of the pipe shed, the sleeve arch and the protective arch according to an embodiment of the present invention;

[0040] Reference Signs:

[0041] The first anti-sliding pile 1, the second anti-sliding pile 2, the retaining pile 3, the support body 4, the backfill soil 5, the tunnel 6, the rock and soil 7, the protective arch 8, the sleeve arch 9, the pipe shed 10. Detailed Embodiments

[0042] This part will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the drawings. The function of the drawings is to supplement the description in the text part of the specification, enabling people to intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it cannot be understood as a limitation on the protection scope of the present invention.

[0043] In the description of the present invention, it should be understood that for the orientation description, such as the orientation or positional relationship indicated by up, down, front, back, left, right, etc., is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0044] In the description of the present invention, the meaning of "several" is one or more, the meaning of "multiple" is more than two. Understandings such as "greater than", "less than", "exceeding", etc. do not include the present number, and understandings such as "above", "below", "within", etc. include the present number. If there is a description of "first" and "second", it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0045] In the description of the present invention, unless otherwise clearly defined, words such as "set", "installed", "connected", etc. should be understood in a broad sense. Those skilled in the art can reasonably determine the specific meanings of the above words in the present invention in combination with the specific content of the technical solution.

[0046] Refer to Figures 1 to 7 , the mountain tunnel 6 breaking the skew anti-slide pile into the hole retaining system, including:

[0047] At least one first anti-slide pile 1 and at least one second anti-slide pile 2, the first anti-slide pile 1 and the second anti-slide pile 2 are buried in the rock and soil 7 and form an anti-slide structure;

[0048] Tunnel 6, the second anti-slide pile 2 is partially broken and the tunnel 6 passes through the second anti-slide pile 2 from the partially broken place;

[0049] Supporting body 4 and at least two supporting piles 3, the supporting body 4 is higher than the tunnel 6, and each supporting pile 3 supports the supporting body 4 from both sides of the tunnel 6. The supporting body 4 and the supporting piles 3 are buried in the rock and soil 7 and form an anti-slide structure.

[0050] The above-mentioned mountain tunnel 6 breaking the skew anti-slide pile into the hole retaining system has at least the following beneficial effects:

[0051] The retaining pile 3 and the retaining body 4 can provide a synergistic anti-sliding effect for the partial demolition of the second anti-sliding pile 2, forming a composite anti-sliding structure. On the basis of reinforcement treatment, it also serves as the retaining structure of the tunnel 6. The stress mechanism of the retaining body 4 and the retaining pile 3 is clear, the spatial stiffness is large, the deformation is controllable, the operation is convenient, and the retaining effect is good. The retaining body 4 and the retaining pile 3 can form a passive retaining structure, and combined with the existing first anti-sliding pile 1, they can give full play to the bearing capacity, meeting the requirements of the new tunnel 6 for the strength and stability during the demolition of the obliquely intersecting anti-sliding pile. The retaining pile 3 and the retaining body 4 can replace the second anti-sliding pile 2 to form a new anti-sliding structure, making the anti-sliding performance of the new anti-sliding structure not weaker than that of the anti-sliding structure formed by the original first anti-sliding pile 1 and the second anti-sliding pile 2, so that the tunnel 6 can safely pass through the second anti-sliding pile 2.

[0052] Regarding the first anti-sliding pile 1, the first anti-sliding pile 1 is an existing anti-sliding structure in the rock and soil 7 of the mountain ridge, and can form a more reliable anti-sliding system in combination with the retaining body 4 and the retaining pile 3.

[0053] Regarding the second anti-sliding pile 2, the second anti-sliding pile 2 is an existing anti-sliding structure in the rock and soil 7 of the mountain ridge. During the construction of the tunnel 6, it is necessary to partially demolish the second anti-sliding pile 2 so that the tunnel 6 can pass through the second anti-sliding pile 2. The second anti-sliding pile 2 is usually arranged between each first anti-sliding pile 1. After partial demolition, the retaining performance of the second anti-sliding pile 2 is weakened, but it can still cooperate with the first anti-sliding pile 1, the retaining body 4 and the retaining pile 3 to form an anti-sliding structure.

[0054] Regarding the tunnel 6, the tunnel 6 is a cylindrical concrete structure and can pass through the second anti-sliding pile 2 after the second anti-sliding pile 2 is partially demolished.

[0055] Regarding the retaining body 4, the retaining body 4 is a lattice box body, and at least one sunken lattice cavity is provided on the retaining body 4, and the lattice cavity is filled with backfill soil 5. The retaining body 4 can support the rock and soil 7, and has a clear stress mechanism, large spatial stiffness, controllable deformation, convenient operation and good retaining effect, which can well ensure the overall stiffness and the safety of the retaining structure. The retaining body 4 is arranged closely to the first anti-sliding pile 1 and the second anti-sliding pile 2, which is beneficial to strengthening the synergistic effect. The coverage range of the retaining body 4 is larger than the array range of the retaining pile 3, and the edge of the retaining pile 3 is arranged closely to the first anti-sliding pile 1 and the second anti-sliding pile 2, which is beneficial to strengthening the retaining effect.

[0056] Regarding the support pile 3, the support pile 3 can be selected as, but not limited to, a reinforced concrete pile. Since the second anti-slide pile 2 within the face area needs to be demolished for the tunnel 6 to enter the cave, in this embodiment, there are five second anti-slide piles 2 located at the excavation face of the tunnel 6. Here, a conversion system of the support body 4 and the support pile 3 is adopted to bear the sliding force induced by the partial demolition of the second anti-slide pile 2, so as to ensure the overall safety and stability of the tunnel 6 and the existing mountain slope. In this embodiment, the support pile 3 is a bored cast-in-place pile. The support pile 3 is lower than the first anti-slide pile 1, and the pile top of the support pile 3 is embedded 150 mm into the bottom plate of the support body 4, which is used to bear the horizontal thrust of the conversion system and the foundation pit support of the open-cut section of the tunnel 6. In this embodiment, the length of the support pile 3 is 23 m, and the pile body material is a cast-in-place pile made of C35 concrete and HRB400 steel bars.

[0057] Regarding the rock and soil 7, the rock and soil 7 refers to a mixed system of rocks and soils in the mountain slope. Since the rock and soil 7 is in the slope body, there is a possibility of landslide, and anti-slide structures are needed for reinforcement.

[0058] In a possible implementation manner, the support body 4 is a lattice box body, and at least one sunken cavity is provided on the support body 4, and the cavity is filled with backfill soil 5. The lattice box body structure of the support body 4 makes its own weight lighter and the structural strength higher. Combined with the backfill soil 5, it can provide reliable support performance.

[0059] In a possible implementation manner, the support body 4 is a cast-in-place reinforced concrete structure. The support body 4 adopting a cast-in-place reinforced concrete structure can reduce the transportation difficulty and realize local material taking at the construction site, which is beneficial to reducing the construction cost.

[0060] In a possible implementation manner, the support pile 3 is a cast-in-place reinforced concrete pile. Selecting a cast-in-place reinforced concrete pile for the support pile 3 can reduce the transportation difficulty and realize local material taking at the construction site, which is beneficial to reducing the construction cost.

[0061] In a possible implementation manner, each support pile 3 is parallel to each other and is arranged in an array along both sides of the tunnel 6, and one end of the support pile 3 is embedded into the support body 4. The support piles 3 being arranged in an array within a certain range on both sides of the tunnel 6 can strengthen the stability of the anti-slide system, and one end of the support pile 3 being embedded into the support body 4 can strengthen the bearing capacity of the anti-slide system.

[0062] Regarding the support body 4, the contact surface between the support body 4 and the support pile 3 needs to be roughened, and effective connection is achieved through post-inserted bars. Reinforcing bars with a diameter of 25 mm are inserted between the support pile 3 and the support body 4, and the reinforcing bars are arranged at intervals of 500 mm, so as to form an effective connection among the reinforcing bars, the support body 4 and the support pile 3. The inserted length of the reinforcing bars is 0.5 m. The gaps between the reinforcing bars and the support body 4 and the support pile 3 are filled with cast-in-place concrete. The support body 4 is a reinforced concrete structure formed by C30 concrete and HRB400 reinforcing bars. The backfill soil 5 is crushed stone sand.

[0063] In a possible implementation manner, the edge of the support body 4 is in contact with the first anti-slide pile 1 and the second anti-slide pile 2. The tight arrangement between the edge of the support body 4 and the first anti-slide pile 1 or the second anti-slide pile 2 is beneficial to enhancing the reliability of the anti-slide system.

[0064] Regarding the support body 4, the edge shape of the support body 4 is flexibly set according to the layout of the first anti-slide pile 1 and the second anti-slide pile 2, so that the edge of the support body 4 is in contact with the first anti-slide pile 1 and the second anti-slide pile 2.

[0065] In a possible implementation manner, the mountain tunnel 6 breaking through the skewed anti-slide pile into the hole retaining system further includes an arch protection 8, a sleeve arch 9 and a pipe shed 10. The sleeve arch 9 is a reinforced concrete structure with holes. The sleeve arch 9 is arranged between the support body 4 and the tunnel 6. The included angle between the sleeve arch 9 and the tunnel 6 is greater than 0. One side of the sleeve arch 9 is connected to the arch protection 8. The pipe shed 10 passes through the reserved holes inside the sleeve arch 9. The arch protection 8, the sleeve arch 9 and the pipe shed 10 can form a reliable retaining structure above the tunnel 6, which is beneficial to the safe construction of the tunnel 6 and can enhance the structural stability of the tunnel 6.

[0066] Regarding the sleeve arch 9, the sleeve arch 9 is a strip-shaped reinforced concrete structure. A plurality of reserved holes for installing the pipe shed 10 are provided on the sleeve arch 9. The sleeve arch 9 is higher than the tunnel 6. The sleeve arch 9 is arranged between the tunnel 6 and the support body 4. The edge of the sleeve arch 9 is in tight contact with the first anti-slide pile 1 and the second anti-slide pile 2. The sleeve arch 9 is arranged at the junction of the open cut and the hidden cut of the tunnel 6.

[0067] Regarding the pipe shed 10, the pipe shed 10 can be selected but not limited to a φ108×6 mm steel pipe with holes. The length of the pipe shed 10 is 30 m to 40 m. The pipe shed 10 is driven into the rock and soil 7 at an external inclination angle of 1° to 2° and passes through the reserved holes of the sleeve arch 9 and the arch protection 8, which is beneficial to ensuring the support effect and construction accuracy.

[0068] In a possible implementation manner, the arch protection 8 is a reinforced concrete structure. The arch protection 8 is arranged between the support body 4 and the tunnel 6. The included angle between the arch protection 8 and the tunnel 6 is greater than 0.

[0069] Regarding the protective arch 8, the protective arch 8 is made of reinforced concrete and is arranged on the top surface of the tunnel 6. The protective arch 8 is connected to the socket arch 9. The pipe shed 10 can pass through the socket arch 9 and the protective arch 8 through the reserved holes.

[0070] The construction method of the support system for the mountain tunnel 6 to break through the skewed anti-slide pile and enter the hole includes the following steps:

[0071] Construct the support pile 3, and set the support pile 3 in the rock mass;

[0072] Construct the support body 4, and set the support body 4 on the support pile 3 so that one end of the support pile 3 is fixedly connected to the support body 4;

[0073] Excavate the open cut section of the tunnel 6, install the steel arch, and pour the tunnel 6 structure;

[0074] Construct the socket arch 9, and set the socket arch 9 between the tunnel 6 and the support body 4;

[0075] Construct the protective arch 8, and set the protective arch 8 between the tunnel 6 and the support body 4, and arrange the protective arch 8 adjacent to the socket arch 9;

[0076] Construct the pipe shed 10, drive the pipe shed 10 into the rock and soil 7 and make the pipe shed 10 pass through the reserved holes of the socket arch 9 and the protective arch 8;

[0077] Construct the mined - out section of the tunnel 6, carry out partial demolition and shotcrete support on the second anti - slide pile 2, pour the tunnel 6 structure and make the tunnel 6 pass through the second anti - slide pile 2.

[0078] The above construction method of the support system for the mountain tunnel 6 to break through the skewed anti - slide pile and enter the hole has at least the following beneficial effects:

[0079] First, construct the support pile 3 and the support body 4, then carry out the excavation of the open cut section of the tunnel 6, and then set the socket arch 9, the protective arch 8 and the pipe shed 10, which can build a reliable support system before partial demolition of the second anti - slide pile 2, strengthening the reliability of the original anti - slide structure. Then, carry out partial demolition of the second anti - slide pile 2, and finally carry out the construction of the mined - out section of the tunnel 6, which can ensure that the anti - slide structure always maintains a high safety factor, so that the tunnel 6 can safely pass through the second anti - slide pile 2.

[0080] Regarding the support pile 3, the support pile 3 is selected as a bored cast - in - place pile. 4 acoustic logging tubes are arranged in the support pile 3.

[0081] Regarding the support body 4, the thickness of the side wall and partition wall of the box body of the support body 4 is 1m, and the thickness of the bottom plate of the box body of the support body 4 is 1.5m.

[0082] Regarding the socket arch 9, the socket arch 9 is 0.6m thick, the included angle between the socket arch 9 and the tunnel 6 is 120° to 150°, and each socket arch 9 is symmetrically arranged.

[0083] Regarding the protective arch 8, the thickness of the protective arch 8 is 0.6 m, and the gap between the protective arch 8, the sleeve arch 9 and the bottom plate of the support body 4 is backfilled with concrete.

[0084] Regarding the pipe shed 10, the pipe shed 10 is driven into the rock and soil 7 at an external inclination angle of 1° to 2° and passes through the reserved holes of the sleeve arch 9 and the protective arch 8.

[0085] Regarding the second anti-slide pile 2, in this embodiment, the number of the second anti-slide piles 2 that are partially demolished is 5.

[0086] In a possible implementation manner, before the step of constructing the support pile 3, a sonic logging tube for ultrasonic testing is pre-embedded in each support pile 3. The sonic logging tube is a Q235B inspection tube, which is arranged inside the steel reinforcement cage. The bottom of the sonic logging tube is sealed and welded with a steel plate, and the pipe orifice of the sonic logging tube is covered. The concrete age of the support pile 3 is greater than 14 days. The sonic logging tube can be used for ultrasonic testing to ensure the reliability of the support pile 3.

[0087] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made without departing from the spirit of the present invention within the scope of knowledge possessed by those of ordinary skill in the art.

Claims

1. Construction method of inclined anti-sliding pile breaking and entrance retaining system for mountain tunnel, characterized in that, The anti-slide pile and supporting system for entering the mountain tunnel by breaking the skewed anti-slide pile includes: At least one first anti-slide pile and at least one second anti-slide pile, which are buried in the rock and soil to form an anti-slide structure; A tunnel, wherein the second anti-slide pile is partially broken and the tunnel passes through the second anti-slide pile at the partially broken part; A supporting body and at least two supporting piles. The supporting body is higher than the tunnel, and each of the supporting piles supports the supporting body from both sides of the tunnel. The supporting body and the supporting piles are buried in the rock and soil to form an anti-slide structure; the edge of the supporting body is in contact with the first anti-slide pile and the second anti-slide pile; The method includes the following steps: Construction of the supporting piles, setting the supporting piles in the rock mass; Construction of the supporting body, setting the supporting body on the supporting piles so that one end of the supporting piles is fixedly connected to the supporting body; Excavation of the open-cut section of the tunnel, installing steel arch frames, and pouring the tunnel structure; Construction of the sleeve arch, setting the sleeve arch between the tunnel and the supporting body; Construction of the protective arch, setting the protective arch between the tunnel and the supporting body, and arranging the protective arch adjacent to the sleeve arch; Construction of the pipe shed, driving the pipe shed into the rock and soil and making the pipe shed pass through the reserved holes of the sleeve arch and the protective arch; Construction of the hidden excavation section of the tunnel, partially breaking the second anti-slide pile and implementing shotcrete support, pouring the tunnel structure and making the tunnel pass through the second anti-slide pile.

2. The construction method of the inclined anti-slide pile entry support system for mountain tunnel demolition according to claim 1, characterized in that: The supporting body is a lattice box body, and at least one sunken cavity is provided on the supporting body, and the cavity is filled with backfill soil.

3. The construction method of the inclined anti-sliding pile breaking and entering the tunnel support system for mountain tunnels according to claim 2, characterized in that: The supporting body is a cast-in-place reinforced concrete structure.

4. The construction method of the inclined anti-slide pile and entrance retaining system for mountain tunnel breaking according to claim 1, characterized in that: The supporting pile is a cast-in-place reinforced concrete pile.

5. The construction method of the inclined anti-sliding pile entry support system for mountain tunnel demolition according to claim 4, characterized in that: Each of the supporting piles is parallel to each other and is arranged in an array along both sides of the tunnel, and one end of the supporting pile is embedded in the supporting body.

6. The construction method of the inclined anti-sliding pile entry support system for mountain tunnel demolition according to claim 1, characterized in that: The anti-slide pile and supporting system for entering the mountain tunnel by breaking the skewed anti-slide pile further includes a protective arch, a sleeve arch and a pipe shed. The sleeve arch is a reinforced concrete structure with holes, and the sleeve arch is arranged between the supporting body and the tunnel. The included angle between the sleeve arch and the tunnel is greater than 0. One side of the sleeve arch is connected to the protective arch, and the pipe shed passes through the reserved hole inside the sleeve arch.

7. The construction method of the inclined anti-slide pile entry support system for mountain tunnel demolition according to claim 6, characterized in that: The protective arch is a reinforced concrete structure, and the protective arch is arranged between the supporting body and the tunnel. The included angle between the protective arch and the tunnel is greater than 0.

8. The construction method of the inclined anti-sliding pile entry support system for mountain tunnel demolition according to claim 1, characterized in that: Before the step of constructing the supporting piles, a sonic logging tube for ultrasonic detection is pre-buried for each supporting pile. The sonic logging tube is a Q235B detection tube, which is arranged inside the steel reinforcement cage. The bottom of the sonic logging tube is sealed and welded with a steel plate, and the pipe orifice of the sonic logging tube is covered. The concrete age of the supporting pile is greater than 14 days.

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