Soft rock tunnel rapid reequipping mechanical grinding and cutting construction method

Abstract

The present application relates to the soft rock tunnel quick replacement mechanical grinding and cutting construction method, mainly relates to the temporary inverted arch formwork system, steel frame temporary vertical support, steel arch quick lengthening technology, recycling prefabricated assembly type stop wall, advance jet grouting pile construction platform, mainly includes tunnel initial lining, inverted arch, inverted arch formwork, steel trestle, temporary vertical support, steel frame, working face, advance jet grouting pile and the like.The soft rock tunnel quick replacement mechanical grinding and cutting construction method involved in the present application provides a more scientific and reasonable solution for the construction of soft rock hydraulic tunnel, and actively contributes to the development of water conservancy construction.

Description

Technical Field

[0001] The invention relates to a rapid replacement mechanical grinding and cutting construction method for a soft rock tunnel, and is mainly applicable to hydraulic tunnel construction. Background Art

[0002] The construction of soft rock hydraulic tunnels has always been a critical and complex step in modern water conservancy project construction. Due to the unique geological conditions of soft rock, traditional construction methods often fail to meet the requirements of efficiency, safety, and environmental protection. Furthermore, soft rock hydraulic tunnels are characterized by low rock strength, developed joints and fissures, and susceptibility to weathering, all of which pose significant challenges to tunnel construction. Traditional construction methods, such as blasting, are not only inefficient but also cause significant disturbance to the surrounding rock, easily leading to safety accidents such as rock instability and landslides. Furthermore, the noise, dust, and vibration pollution generated by blasting also adversely impact the surrounding environment and residents' lives.

[0003] With the continuous development of mechanized construction technology, more and more tunnel projects are adopting mechanized construction methods. Mechanized construction boasts advantages such as high efficiency, safety, and environmental friendliness, significantly improving construction efficiency and quality while reducing construction risks and costs. Mechanized construction technology offers particularly significant advantages in soft rock hydraulic tunnel construction. Mechanical grinding and cutting methods are gradually gaining popularity in soft rock tunnel construction. While mechanized construction can significantly shorten construction periods, improve efficiency, and reduce impacts on the surrounding environment and personnel, this method still has some shortcomings.

[0004] Based on the actual requirements of complex construction conditions, high construction quality and tight construction period of engineering projects, a new rapid replacement mechanical grinding and cutting construction method for soft rock tunnels with high construction efficiency, excellent construction quality and low safety risk has been innovated to improve the safety and efficiency of tunnel construction, ensure the stability and safety of the tunnel, and provide strong guarantee for the sustainable development of tunnel engineering. Summary of the Invention

[0005] The purpose of the present invention is to improve the safety and efficiency of tunnel construction and ensure the stability and safety of the tunnel.

[0006] In order to achieve the above technical objectives, the present invention adopts the following technical solutions:

[0007] The rapid replacement mechanical grinding and cutting construction method for soft rock tunnels includes the following steps:

[0008] S00. Temporary invert formwork system installed in place:

[0009] The winch and controller box are installed on the steel trestle in sequence;

[0010] Install the pouring main pipe and end cap, pouring branch pipe and pouring branch pipe control rope under the steel trestle. After installing the template linkage rod, install the inverted arch template on the crossbeam at the bottom of the steel trestle, install the controller, and finally install the template clamp;

[0011] S10. Inverted Arch Construction:

[0012] Turn on the controller, lower the inverted arch formwork to the designed height, then lower the formwork fixture, fix the formwork corners to the primary lining embedded plate with bolts, lower the pouring branch pipe, and then start pouring concrete. Stop grouting when the slurry discharged from the exhaust hole meets the requirements.

[0013] S20, Steel frame installation:

[0014] Place the quick-connect upper plate of the steel frame to be connected on the quick-connect lower plate of the upper steel frame, and at the same time put the quick-connect rod into the quick-connect sleeve on the upper steel frame to complete the steel frame installation;

[0015] S30, Temporary upright support installation:

[0016] Install temporary upright supports in the top cross sleeve of the steel frame, adjust the height of the inner rod of the middle cross sleeve to make the temporary upright supports reach the tension state, and then install the mesh spray pipe on the mesh spray auxiliary plate to carry out the primary lining construction;

[0017] S40, soft rock treatment construction:

[0018] Install assembled grouting walls on the core soil and the face of the tunnel, tighten them with angle steel pressure plates on all sides, and fix them with quick-connect screws. Then, pour cement slurry into the grouting holes to reinforce the soft rock. After installing the I-beam on the steel trestle, install the platform plate and slope plate on the I-beam to carry out the soft rock reinforcement construction with advanced rotary jet piles.

[0019] Furthermore, the temporary inverted arch formwork system is placed at the bottom of the steel trestle, the bottom of the tunnel primary lining is provided with a primary lining embedded plate, a truss structure is set at the bottom of the steel trestle, formwork linkage rods are set on both sides and the bottom, one end of the formwork linkage rod is connected to the inverted arch formwork, and a controller is set on the formwork linkage rod, which is wirelessly controlled by a controller control box.

[0020] Furthermore, the inverted arch formwork is composed of four pieces, a formwork clamp is set at the joint of each piece, exhaust holes are set on the formwork on both sides, a formwork angle is set on the top, and it is connected to the primary lining embedded plate by bolts, a pouring port is set on the bottom formwork, a pouring branch pipe is set in the pouring port, a pouring branch pipe is set on the pouring branch pipe, a pouring branch pipe pull ring is set on the pouring branch pipe, a pouring branch pipe control rope is set on the pouring branch pipe pull ring, the pouring branch pipe control rope is connected to the winch, a pouring main pipe is set at the end of the pouring branch pipe, one end of the pouring main pipe is connected to the concrete pump truck, and the other end is set with a cap, and is fixed to the steel trestle by a fixed clamp.

[0021] Furthermore, a temporary upright support of the steel frame is placed at the lower part of the steel frame, a temporary upright support base is arranged at the bottom, a sleeve is arranged on the temporary upright support base, a temporary upright support is arranged on the sleeve, a horizontal reinforcement support is arranged in the middle position of the temporary upright support, middle cross sleeves are arranged at both ends of the horizontal reinforcement support, a mesh spray auxiliary plate sleeve is arranged on the top horizontal reinforcement support, auxiliary plate legs are arranged in the mesh spray auxiliary plate sleeve, mesh spray auxiliary plates are arranged on the auxiliary plate legs, the mesh spray auxiliary plates are spot welded to the cross bars of the temporary upright support, horizontal trusses are staggered on the top of the temporary upright support, truss end plates are arranged at the ends of the horizontal trusses, and are connected to the truss connecting plates on the temporary upright support by bolts, and the top of the temporary upright support is connected to the top cross sleeve on the steel frame.

[0022] Furthermore, a quick-connect sleeve and a quick-connect rod are provided on the steel frame, and a quick-connect upper plate and a quick-connect lower plate are provided on the top. The two sides of the steel frame are quickly connected by the quick-connect sleeve and the quick-connect rod, and the top is quickly connected by the quick-connect upper plate, the quick-connect lower plate and bolts.

[0023] Furthermore, the prefabricated grouting wall is placed in front of the heading face, with the lower part close to the core soil. The prefabricated grouting wall consists of two pieces, a connecting plate is arranged between the two, a steel edging is arranged at the bottom, and angle steel pressure plates are arranged around to close to the tunnel excavation edge line. Quick-connect screws are arranged between the angle steel pressure plate and the prefabricated grouting wall, and grouting holes are evenly arranged on the prefabricated grouting wall.

[0024] Furthermore, an I-beam crossbeam is placed on a steel trestle and fixed by bolts. A slope plate and a platform plate are set on the top of the I-beam crossbeam. Construction machinery for advanced rotary jet grouting piles is set on the platform plate, and advanced rotary jet grouting piles are set on both sides of the core soil.

[0025] The present invention has the following characteristics and beneficial effects:

[0026] 1. The present invention develops a temporary inverted arch formwork system, which improves the construction efficiency of the inverted arch and further improves the construction quality of the tunnel primary lining.

[0027] 2. The present invention has developed a technology for rapid extension of steel arch frames, which improves the construction efficiency and construction accuracy of the initial installation of tunnel support steel frames.

[0028] 3. The present invention adopts prefabricated assembled grouting wall and advanced rotary jet piles. The assembled grouting wall ensures the construction efficiency of grouting construction in soft rock face and improves the safety of soft rock tunnel construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a three-dimensional schematic diagram of the rapid replacement mechanical grinding and cutting construction method for soft rock tunnels;

[0030] Figure 2 This is a schematic diagram of the installation of the temporary invert formwork system;

[0031] Figure 3 This is a schematic diagram of the temporary invert formwork system;

[0032] Figure 4 This is a schematic diagram of the rapid extension of the steel arch frame;

[0033] Figure 5 This is a detail drawing of the temporary upright support;

[0034] Figure 6 This is a schematic diagram of a temporary upright support for a steel frame;

[0035] Figure 7 It is a schematic diagram of using prefabricated assembled slurry-stop wall and advanced rotary jet pile;

[0036] Figure 8 This is a schematic diagram of a prefabricated assembled mortar stop wall;

[0037] Figure 9 This is a schematic diagram of the advanced rotary jet grouting pile construction platform.

[0038] In the figure, 1. Tunnel primary lining; 2. Inverted arch; 3. Inverted arch formwork; 4. Steel trestle; 5. Formwork clamp; 6. Casting branch pipe pull ring; 7. Casting port; 8. Casting branch pipe; 9. Formwork linkage rod; 10. Casting branch pipe control rope; 11. Exhaust hole; 12. Winch; 13. Casting main pipe; 14. Fixed clamp; 15. Controller; 16. End cap; 17. Controller box; 18. Formwork corner; 19. Primary lining embedded plate; 20. Temporary upright support base; 21. Sleeve; 22. Steel frame; 23. Temporary upright support; 24. Quick-connect sleeve; 25. Quick-connect rod ; 26. Net-spraying auxiliary plate sleeve; 27. Net-spraying auxiliary plate; 28. Quick-connect upper plate; 29. ​​Horizontal truss; 30. Truss end plate; 31. Truss connecting plate; 32. Auxiliary plate support leg; 33. Horizontal reinforcement support; 34. Middle cross sleeve; 35. Top cross sleeve; 36. Quick-connect lower plate; 37. Hand face; 38. Slope plate; 39. Platform plate; 40. Angle steel pressure plate; 41. Quick-connect screw; 42. Grouting hole; 43. Prefabricated grouting wall; 44. Connecting plate; 45. Core soil; 46. Steel edging; 47. I-beam; 48. Advanced rotary jet pile. DETAILED DESCRIPTION

[0039] The following will be combined with the accompanying drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of this application.

[0040] Those skilled in the art should understand that, in the disclosure of this application, the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the above terms cannot be understood as limiting this application.

[0041] Example 1

[0042] like Figure 1-9 As shown in the figure, the rapid replacement mechanical grinding and cutting construction structure of the soft rock tunnel mainly involves a temporary inverted arch formwork system, temporary steel frame upright support, steel arch frame rapid extension technology, recycled prefabricated assembled slurry stop wall, and advanced rotary jet grouting pile construction platform, mainly including the tunnel primary lining 1, inverted arch 2, inverted arch formwork 3, steel trestle 4, temporary upright support 23, steel frame 22, heading face 37, advanced rotary jet grouting pile 48, etc.

[0043] The temporary inverted arch formwork system is placed at the bottom of the steel trestle 4, and a primary lining embedded plate 19 is provided at the bottom of the tunnel primary lining 1. A truss structure is provided at the bottom of the steel trestle 4, and formwork linkage rods 9 are provided on both sides and the bottom. One end of the formwork linkage rod 9 is connected to the inverted arch formwork 3. A controller 15 is provided on the formwork linkage rod 9, and the controller 15 is wirelessly controlled by a controller control box 17. The inverted arch formwork 3 consists of four pieces, and a formwork clamp 5 is set at the joint of each piece. Exhaust holes 11 are set on the formwork on both sides, and a formwork angle 18 is set on the top, which is connected to the primary lining embedded plate 19 by bolts. A pouring port 7 is set on the bottom formwork, and a pouring branch pipe 8 is set in the pouring port 7. A pouring branch pipe pull ring 6 is set on the pouring branch pipe 8, and a pouring branch pipe control rope 10 is set on the pouring branch pipe pull ring 6. The pouring branch pipe control rope 10 is connected to the winch 12. A pouring main pipe 13 is set at the end of the pouring branch pipe 8. One end of the pouring main pipe 13 is connected to the concrete pump truck, and the other end is provided with a sealing end 16, and is fixed to the steel trestle 4 by a fixing hoist 14.

[0044] The temporary upright support 23 of the steel frame is placed at the lower part of the steel frame 22, and a temporary upright support base 20 is set at the bottom. A sleeve 21 is set on the temporary upright support base 20, and a temporary upright support 23 is set on the sleeve 21. A horizontal reinforcement support 33 is set in the middle position of the temporary upright support 23, and middle cross sleeves 34 are set at both ends of the horizontal reinforcement support 33. A mesh spraying auxiliary plate sleeve 26 is set on the top horizontal reinforcement support 33, and an auxiliary plate support leg 32 is set in the mesh spraying auxiliary plate sleeve 26. A mesh spraying auxiliary plate 27 is set on the auxiliary plate support leg 32, and the mesh spraying auxiliary plate 27 is spot welded to the cross bar of the temporary upright support 23. Horizontal trusses 29 are staggered at the top of the temporary upright support 23, and truss end plates 30 are set at the ends of the horizontal trusses 29, which are connected to the truss connecting plates 31 on the temporary upright support 23 by bolts. The top of the temporary upright support 23 is connected to the top cross sleeve 35 on the steel frame 22.

[0045] The steel arch frame rapid extension technology includes setting a quick-connect sleeve 24 and a quick-connect rod 25 on the steel frame 22, and setting a quick-connect upper plate 28 and a quick-connect lower plate 36 on the top. The two sides of the steel frame 22 are quickly connected through the quick-connect sleeve 24 and the quick-connect rod 25, and the top is quickly connected through the quick-connect upper plate 28 and the quick-connect lower plate 36 and bolts.

[0046] A recycled prefabricated assembled grouting wall 43 is placed in front of the tunnel face 37, with its lower part close to the core soil 45. The assembled grouting wall 43 consists of two pieces, with a connecting plate 44 set between the two, a steel edging 46 set at the bottom, and angle steel pressure plates 40 set around to close to the tunnel excavation edge line. Quick-connect screws 41 are set between the angle steel pressure plate 40 and the assembled grouting wall 43, and grouting holes 42 are evenly arranged on the assembled grouting wall 43.

[0047] The I-beam 47 at the bottom of the advance jet grouting pile construction platform is placed on the steel trestle 4 and fixed by bolts. A slope plate 38 and a platform plate 39 are set on the top of the I-beam 47. The construction machinery of the advance jet grouting pile 48 is set on the platform plate 39, and the advance jet grouting piles 48 are set on both sides of the core soil 45.

[0048] Example 2

[0049] Based on the same concept, this method for rapid mechanical grinding and cutting in soft rock tunnels includes the following steps:

[0050] S00. Temporary invert formwork system installed in place:

[0051] The winch 12 and the controller box 17 are installed on the steel trestle 4 in sequence;

[0052] Install the pouring main pipe 13 and end cap 16, pouring branch pipe 8 and pouring branch pipe control rope 10 under the steel trestle 4. After installing the template linkage rod 9, the inverted arch formwork 3 is installed on the crossbeam at the bottom of the steel trestle 4, and the controller 15 is installed. Finally, install the template clamp 5;

[0053] S10, Invert 2 Construction:

[0054] Turn on the controller 15, lower the inverted arch formwork 3 to the designed height, then lower the formwork fixture 5, fix the formwork corner 18 and the primary lining embedded plate 19 with bolts, and then lower the pouring branch pipe 8. Then start pouring concrete. Stop grouting when the slurry discharged from the exhaust hole 11 meets the requirements.

[0055] S20, steel frame 22 installation:

[0056] Place the quick-connect upper plate 28 of the steel frame to be connected on the quick-connect lower plate 36 of the upper steel frame, and at the same time put the quick-connect rod 25 into the quick-connect sleeve on the upper steel frame to complete the installation of the steel frame 22;

[0057] S30, Temporary upright support installation:

[0058] Install the temporary upright support 23 in the top cross sleeve 35 of the steel frame 22, adjust the height of the inner rod of the middle cross sleeve 34 so that the temporary upright support 23 reaches the tension state, and then install the mesh spray pipe on the mesh spray auxiliary plate 27 to carry out the primary lining construction;

[0059] S40, soft rock treatment construction:

[0060] An assembled grouting wall 43 is installed on the core soil 45 and the tunnel face 37, and is tightened with angle steel pressure plates 40 on all sides and fixed by quick-connect screws 41. Subsequently, cement slurry is poured into the grouting holes 42 to reinforce the soft rock. After an I-beam crossbeam 47 is installed on the steel trestle 4, a platform plate 39 and a slope plate 38 are installed on the I-beam crossbeam 47 to carry out the advanced rotary jet pile soft rock reinforcement construction.

[0061] The parts not described in detail in this application are prior art, so this application does not describe them in detail.

[0062] It is to be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the elements may be multiple, and the term "one" should not be understood as a limitation on the quantity.

[0063] Although the term "etc." is frequently used herein, the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of this application; interpreting them as any additional restrictions is contrary to the spirit of this application.

[0064] This application is not limited to the above-mentioned optimal implementation method. Anyone can derive various other forms of products based on the inspiration of this application. However, no matter what changes are made in their shape or structure, any technical solution that is the same or similar to that of this application falls within the scope of protection of this application.

Claims

1. A rapid mechanical grinding and cutting construction method for soft rock tunnels, characterized in that: The following steps are involved: S00. Temporary invert formwork system installed in place: A winch (12) and a controller box (17) are sequentially installed on the steel trestle (4); Install the pouring main pipe (13) and the end cap (16), the pouring branch pipe (8) and the pouring branch pipe control rope (10) under the steel trestle (4), install the template linkage rod (9) on the inverted arch formwork (3) and then install it on the crossbeam at the bottom of the steel trestle (4), install the controller (15), and finally install the template clamp (5); S10, Inverted Arch (2) Construction: Turn on the controller (15), lower the inverted arch formwork (3) to the designed height, then lower the formwork fixture (5), fix the formwork corner (18) and the primary lining embedded plate (19) with bolts, and then lower the pouring branch pipe (8), and then start pouring concrete. When the slurry is discharged from the exhaust hole (11) on the inverted arch formwork (3) to meet the requirements, stop grouting; S20, Steel frame (22) installation: Place the quick-connect upper plate (28) of the steel frame to be connected on the quick-connect lower plate (36) of the upper steel frame, and at the same time put the quick-connect rod (25) into the quick-connect sleeve on the upper steel frame to complete the installation of the steel frame (22); S30, Temporary upright support installation: A temporary upright support (23) is installed in the top cross sleeve (35) of the steel frame (22), and the height of the inner rod of the middle cross sleeve (34) is adjusted so that the temporary upright support (23) reaches a tensioned state, and then a mesh spray pipe is installed on the mesh spray auxiliary plate (27) to perform primary lining construction; Among them, a horizontal reinforcement support (33) is set in the middle position of the temporary upright support (23), a middle cross sleeve (34) is set at both ends of the horizontal reinforcement support (33), a mesh spray auxiliary plate sleeve (26) is set on the top horizontal reinforcement support (33), an auxiliary plate support leg (32) is set in the mesh spray auxiliary plate sleeve (26), and a mesh spray auxiliary plate (27) is set on the auxiliary plate support leg (32); S40, soft rock treatment construction: An assembled grouting wall (43) is installed on the core soil (45) and the tunnel face (37), and is tightened with angle steel pressure plates (40) on all sides and fixed by quick-connect screws (41). Subsequently, cement slurry is poured into the grouting holes (42) of the assembled grouting wall (43) to reinforce the soft rock. After the I-beam crossbeam (47) is installed on the steel trestle (4), the platform plate (39) and the slope plate (38) are installed on the I-beam crossbeam (47) to carry out the soft rock reinforcement construction of the advanced rotary jet pile.

2. The method for rapid mechanical grinding and cutting of soft rock tunnels according to claim 1 is characterized in that: The temporary inverted arch formwork system is placed at the bottom of the steel trestle (4), the bottom of the tunnel primary lining (1) is provided with a primary lining embedded plate (19), a truss structure is provided at the bottom of the steel trestle (4), template linkage rods (9) are provided on both sides and the bottom, one end of the template linkage rod (9) is connected to the inverted arch formwork (3), a controller (15) is provided on the template linkage rod (9), and the controller (15) is wirelessly controlled by a controller control box (17).

3. The method for rapid mechanical grinding and cutting in soft rock tunnels according to claim 2 is characterized in that: The inverted arch formwork (3) is composed of four pieces, each piece is provided with a formwork clamp (5) at the joint, exhaust holes (11) are provided on the two side formworks, a formwork angle (18) is provided on the top, and is connected to the primary lining embedded plate (19) by bolts, a pouring port (7) is provided on the bottom formwork, a pouring branch pipe (8) is provided in the pouring port (7), a pouring branch pipe pull ring (6) is provided on the pouring branch pipe (8), a pouring branch pipe control rope (10) is provided on the pouring branch pipe pull ring (6), and the pouring branch pipe control rope (10) is connected to the winch (12), a pouring main pipe (13) is provided at the end of the pouring branch pipe (8), one end of the pouring main pipe (13) is connected to the concrete pump truck, and the other end is provided with a sealing end (16), and is fixed to the steel trestle (4) by a fixing hoop (14).

4. The method for rapid mechanical grinding and cutting construction of soft rock tunnels according to claim 1 is characterized in that: The temporary upright support (23) of the steel frame (22) is placed at the lower part of the steel frame (22), a temporary upright support base (20) is provided at the bottom, a sleeve (21) is provided on the temporary upright support base (20), a temporary upright support (23) is provided on the sleeve (21), a mesh spray auxiliary plate (27) is spot welded on the cross bar of the temporary upright support (23), horizontal trusses (29) are arranged in an interlaced manner on the top of the temporary upright support (23), a truss end plate (30) is provided at the end of the horizontal truss (29), and is connected to the truss connecting plate (31) on the temporary upright support (23) by bolts, and the top of the temporary upright support (23) is connected to the top cross sleeve (35) on the steel frame (22).

5. The method for rapid mechanical grinding and cutting in soft rock tunnels according to claim 4 is characterized in that: A quick-connect sleeve (24) and a quick-connect rod (25) are provided on the steel frame (22), and a quick-connect upper plate (28) and a quick-connect lower plate (36) are provided on the top. Both sides of the steel frame (22) are quickly connected through the quick-connect sleeve (24) and the quick-connect rod (25), and the top is quickly connected through the quick-connect upper plate (28) and the quick-connect lower plate (36) and bolts.

6. The method for rapid mechanical grinding and cutting construction of soft rock tunnels according to claim 1 is characterized in that: The assembled grouting wall (43) is placed in front of the tunnel face (37), with its lower part close to the core soil (45). The assembled grouting wall (43) consists of two pieces, a connecting plate (44) is arranged between the two pieces, a steel edge (46) is arranged at the bottom, and angle steel pressure plates (40) are arranged around the four sides close to the tunnel excavation edge line. A quick-connect screw (41) is arranged between the angle steel pressure plate (40) and the assembled grouting wall (43), and grouting holes (42) are evenly arranged on the assembled grouting wall (43).

7. The method for rapid mechanical grinding and cutting in soft rock tunnels according to claim 1 is characterized in that: The I-beam crossbeam (47) is placed on the steel trestle (4) and fixed by bolts. A slope plate (38) and a platform plate (39) are set on the top of the I-beam crossbeam (47). A construction machine for advanced jet grouting piles (48) is set on the platform plate (39). Advanced jet grouting piles (48) are set on both sides of the core soil (45).

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