Soft rock tunnel quick reloading mechanical abrasion cutting construction method

Abstract

The invention relates to a soft rock tunnel quick reloading mechanical abrasion cutting construction method, and mainly relates to a temporary inverted arch template system, a steel frame temporary upright support, a steel arch quick extension technology, a cyclic utilization prefabricated grout stop wall and an advanced jet grouting pile construction platform. The structure mainly comprises a tunnel primary lining, an inverted arch, an inverted arch template, a steel trestle, a temporary upright support, a steel frame, a tunnel face, an advanced jet grouting pile and the like. According to the abrasion cutting construction method for the soft rock tunnel rapid reloading machine, a more scientific and reasonable solution is provided for construction of the soft rock hydraulic tunnel, and positive contributions are made for promoting development of hydraulic engineering construction.

Description

Technical Field

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

[0002] In the construction of modern water conservancy projects, the construction of soft rock hydraulic tunnels has always been an important and complex link. Due to the particularity of soft rock geological conditions, traditional construction methods often fail to meet the requirements of high efficiency, safety and environmental protection. Moreover, soft rock hydraulic tunnels have characteristics such as low rock strength, developed joint fissures, and easy weathering, which pose great challenges to tunnel construction. Traditional construction methods such as blasting not only have low construction efficiency, but also cause large disturbances to the surrounding rock, easily leading to safety accidents such as surrounding rock instability and collapse. At the same time, the pollution such as noise, dust and vibration generated by the blasting method also has an adverse impact on the surrounding environment and the lives of residents.

[0003] With the continuous development of mechanized construction technology, more and more tunnel projects have begun to adopt mechanized construction methods. Mechanized construction has the advantages of high efficiency, safety, environmental protection, etc., which can significantly improve construction efficiency and quality, and reduce construction risks and costs. In the construction of soft rock hydraulic tunnels, mechanized construction technology has more significant advantages. The mechanical grinding and cutting construction method has gradually emerged in the construction of soft rock tunnels. Through mechanized construction, the construction period can be significantly shortened, construction efficiency can be improved, and the impact on the surrounding environment and personnel can be reduced. However, at present, there are still some deficiencies in such methods.

[0004] Based on the practical requirements of complex construction conditions, high construction quality and tight construction period in engineering projects, an innovative rapid replacement mechanical grinding and cutting construction method for soft rock tunnels with high construction efficiency, excellent construction quality and low safety risk is proposed to improve the safety and efficiency of tunnel construction, ensure the stability and safety of the tunnel, and provide a strong guarantee for the sustainable development of tunnel projects. 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] To achieve the above technical objectives, the present invention adopts the following technical solutions: A rapid replacement mechanical grinding and cutting construction method for soft rock tunnels, comprising the following steps: S00. Install and position the temporary inverted arch formwork system: Install a winch and a controller control box on the steel trestle in sequence; Install a pouring main pipe and its end seal, pouring branch pipes and pouring branch pipe control ropes under the steel trestle. After installing the formwork linkage rod on the inverted arch formwork, install it on the cross beam at the bottom of the steel trestle, install a controller, and finally install formwork clamps; S10, Invert construction: Turn on the controller, lower the invert formwork to the designed height, then lower the formwork fixture, fix the formwork corner and the primary lining embedded plate with bolts, and then lower the pouring branch pipe. Subsequently, start pouring concrete and stop grouting after the mud discharged from the exhaust hole meets the requirements. S20, Steel frame installation: Place the upper quick-connect plate of the steel frame to be connected on the lower quick-connect plate of the previous steel frame. At the same time, place the quick-connect rod in the quick-connect sleeve on the previous steel frame to complete the installation of the steel frame. S30, Installation of temporary vertical support: Install the temporary vertical support 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 vertical support in a tensioned state, and then install the shotcrete pipe on the shotcrete auxiliary plate for primary lining construction. S40, Soft rock treatment construction: Install the assembled grouting stop wall on the core soil and the heading face, tightly press it with angle steel pressing plates around, and fix it with quick-connect screw rods. Subsequently, pour cement slurry into the grouting holes for soft rock reinforcement. After installing the I-beam cross beam on the steel trestle, install the platform plate and the slope plate on the I-beam cross beam for advanced jet grouting soft rock reinforcement construction.

[0007] Furthermore, the temporary invert formwork system is placed at the bottom of the steel trestle. There is a primary lining embedded plate at the bottom of the tunnel primary lining. A truss structure is set at the bottom of the steel trestle, and formwork linkage rods are set on both sides and at the bottom. One end of the formwork linkage rod is connected to the invert formwork, and a controller is set on the formwork linkage rod. The controller is wirelessly controlled by the controller control box.

[0008] Furthermore, the invert formwork is composed of four pieces. Formwork fixtures are set at the joints of each piece. Exhaust holes are set on both side formworks, and a formwork corner is set at the top. 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 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 provided with a sealing end and fixed to the steel trestle by a fixed hoop.

[0009] Furthermore, the temporary vertical support of the steel frame is placed at the lower part of the steel frame. A temporary vertical support base is set at the bottom. A sleeve is set on the temporary vertical support base. A temporary vertical support is set on the sleeve. A horizontal reinforcement brace is set at the middle position of the temporary vertical support. Middle cross sleeves are set at both ends of the horizontal reinforcement brace. A shotcrete auxiliary plate sleeve is set on the top horizontal reinforcement brace. An auxiliary plate leg is set inside the shotcrete auxiliary plate sleeve. A shotcrete auxiliary plate is set on the auxiliary plate leg. The shotcrete auxiliary plate is spot-welded to the cross bar of the temporary vertical support. Horizontal trusses are staggeredly arranged at the top of the temporary vertical support. Truss end plates are set at the ends of the horizontal trusses and are connected to the truss connection plates on the temporary vertical support by bolts. The top of the temporary vertical support is connected to the top cross sleeve on the steel frame.

[0010] Furthermore, quick-connect sleeves and quick-connect rods are set on the steel frame. A quick-connect upper plate and a quick-connect lower plate are set at the top. The two sides of the steel frame are quickly connected through the quick-connect sleeves and quick-connect rods, and the top is quickly connected through the quick-connect upper plate, quick-connect lower plate and bolts.

[0011] Furthermore, the assembled grout-stop wall is placed in front of the heading face and is closely attached to the core soil at the lower part. The assembled grout-stop wall is composed of two pieces. A connection plate is set between the two. A profiled steel edge is set at the bottom. Angle steel pressing plates are set around and are closely attached to the tunnel excavation side line. Quick-connect screw rods are set between the angle steel pressing plates and the assembled grout-stop wall. Grouting holes are evenly set on the assembled grout-stop wall.

[0012] Furthermore, the I-beam cross beam is placed on the steel trestle and fixed by bolts. A slope plate and a platform plate are set at the top of the I-beam cross beam. Construction machinery for advanced jet grouting piles is set on the platform plate. Advanced jet grouting piles are set on both sides of the core soil.

[0013] The present invention has the following characteristics and beneficial effects: 1. The present invention has developed a temporary inverted arch formwork system, which improves the construction efficiency of the inverted arch and further improves the construction quality of the primary lining of the tunnel.

[0014] 2. The present invention has developed a technology for quickly lengthening the steel arch frame, which improves the construction efficiency and construction accuracy of the installation of the steel arch frame for the initial support of the tunnel.

[0015] 3. The present invention adopts a prefabricated and assembled grout-stop wall and advanced jet grouting piles. By adopting the assembled grout-stop wall, the construction efficiency of the grouting construction for the soft rock heading face is ensured, and the construction safety of the soft rock tunnel is improved. Description of the Drawings

[0016] Figure 1 is a three-dimensional schematic diagram of the rapid replacement mechanical grinding and cutting construction method for the soft rock tunnel; Figure 2 is a schematic diagram of the installation of the temporary inverted arch formwork system; Figure 3 is a schematic diagram of the temporary inverted arch formwork system; Figure 4 This is a schematic diagram of the rapid extension of the steel arch frame; Figure 5 It is a detail drawing of temporary upright support; Figure 6 It is a schematic diagram of temporary upright support of steel frame; Figure 7 It is a schematic diagram of using prefabricated assembled grout-stopping wall and advanced jet grouting piles; Figure 8 It is a schematic diagram of a prefabricated assembled mortar stop wall; Figure 9 This is a schematic diagram of the advanced rotary jet grouting pile construction platform.

[0017] In the figure, 1, tunnel primary lining; 2, invert; 3, invert 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 control 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. Palm 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

[0018] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of this application.

[0019] Those skilled in the art should understand that, in the disclosure of the present application, the terms "longitudinal", "lateral", "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, which are only for the convenience of describing the present 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 should not be understood as limiting the present application.

[0020] Example 1 As Figures 1-9 shown, the rapid replacement mechanical grinding and cutting construction structure for soft rock tunnels mainly involves a temporary inverted arch formwork system, a temporary steel frame vertical support, a rapid extension technology for steel arches, a recycled prefabricated and assembled grout stop wall, and a construction platform for advanced jet grouting piles. It mainly includes the primary lining 1 of the tunnel, the inverted arch 2, the inverted arch formwork 3, the steel trestle 4, the temporary vertical support 23, the steel frame 22, the tunnel face 37, the advanced jet grouting pile 48, etc.

[0021] The temporary inverted arch formwork system is placed at the bottom of the steel trestle 4. There is a primary lining embedded plate 19 at the bottom of the primary lining 1 of the tunnel. A truss structure is set at the bottom of the steel trestle 4, and formwork linkage rods 9 are arranged 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 set on the formwork linkage rod 9, and the controller 15 is wirelessly controlled by a controller control box 17. The inverted arch formwork 3 is composed of four pieces. Template clamps 5 are set at the joints of each piece. Vent holes 11 are set on both side formworks, and a template fold angle 18 is set at the top. It is connected to the primary lining embedded plate 19 by bolts. A pouring port 7 is set on the bottom formwork. 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. 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 a winch 12. One end of the pouring branch pipe 8 is provided with a pouring main pipe 13. One end of the pouring main pipe 13 is connected to a concrete pump truck, and the other end is provided with a sealing end 16 and is fixed to the steel trestle 4 by a fixed clamp 14.

[0022] The temporary steel frame vertical support 23 is placed under the steel frame 22. A temporary vertical support base 20 is set at the bottom. A sleeve 21 is set on the temporary vertical support base 20, and the temporary vertical support 23 is set on the sleeve 21. A horizontal reinforcement brace 33 is set at the middle position of the temporary vertical support 23. Middle cross sleeves 34 are set at both ends of the horizontal reinforcement brace 33. A shotcrete auxiliary plate sleeve 26 is set on the top horizontal reinforcement brace 33. An auxiliary plate leg 32 is set in the shotcrete auxiliary plate sleeve 26. A shotcrete auxiliary plate 27 is set on the auxiliary plate leg 32 and is spot welded to the cross bar of the temporary vertical support 23. Horizontal trusses 29 are arranged in a staggered manner at the top of the temporary vertical support 23. Truss end plates 30 are set at the ends of the horizontal trusses 29 and are connected to the truss connecting plates 31 on the temporary vertical support 23 by bolts. The top of the temporary vertical support 23 is connected to the top cross sleeve 35 on the steel frame 22.

[0023] The rapid extension technology for steel arches includes a quick connection sleeve 24 and a quick connection rod 25 set on the steel frame 22, a quick connection upper plate 28 and a quick connection lower plate 36 set at the top. The two sides of the steel frame 22 are quickly connected through the quick connection sleeve 24 and the quick connection rod 25, and the top is quickly connected through the quick connection upper plate 28, the quick connection lower plate 36 and bolts.

[0024] The recycled prefabricated grouting stop wall 43 is placed in front of the tunnel face 37, with its lower part closely attached to the core soil 45. The prefabricated grouting stop wall 43 consists of two pieces, with a connecting plate 44 arranged between them, a profiled steel edge 46 at the bottom, and angle steel pressing plates 40 arranged around it closely attached to the tunnel excavation edge line. Quick-connecting screws 41 are arranged between the angle steel pressing plates 40 and the prefabricated grouting stop wall 43 for connection, and grouting holes 42 are evenly arranged on the prefabricated grouting stop wall 43.

[0025] The I-beam cross beam 47 at the bottom of the advanced jet grouting pile construction platform is placed on the steel trestle 4 and fixed by bolts. A ramp plate 38 and a platform plate 39 are arranged at the top of the I-beam cross beam 47, and construction machinery for the advanced jet grouting pile 48 is arranged on the platform plate 39. Advanced jet grouting piles 48 are arranged on both sides of the core soil 45.

[0026] Embodiment 2 Based on the same concept, the rapid replacement mechanical grinding and cutting construction method for this soft rock tunnel includes the following steps: S00. Installation and positioning of the temporary inverted arch formwork system: A winch 12 and a controller control box 17 are successively installed on the steel trestle 4; A pouring main pipe 13, a sealing end 16, a pouring branch pipe 8, and a pouring branch pipe control rope 10 are installed under the steel trestle 4. After installing the formwork linkage rod 9 on the inverted arch formwork 3, it is installed on the cross beam at the bottom of the steel trestle 4, and a controller 15 is installed. Finally, a formwork clamp 5 is installed; S10. Construction of the inverted arch 2: The controller 15 is turned on, and the inverted arch formwork 3 is lowered to the designed height. Subsequently, the formwork clamp 5 is lowered, the formwork fold angle 18 is fixed to the primary lining embedded plate 19 with bolts, and then the pouring branch pipe 8 is lowered. Subsequently, concrete pouring starts and stops when the slurry discharged from the exhaust hole 11 meets the requirements; S20. Installation of the steel frame 22: The quick-connect upper plate 28 of the steel frame to be connected is placed on the quick-connect lower plate 36 of the previous steel frame. At the same time, a quick-connect rod 25 is placed in the quick-connect sleeve on the previous steel frame to complete the installation of the steel frame 22; S30. Installation of the temporary vertical support: A temporary vertical support 23 is installed in the top cross sleeve 35 of the steel frame 22. The height of the inner rod of the middle cross sleeve 34 is adjusted to make the temporary vertical support 23 in a tensioned state. Subsequently, a shotcrete pipe is installed on the shotcrete auxiliary plate 27 for primary lining construction; S40. Construction of soft rock treatment: The prefabricated grouting stop wall 43 is installed on the core soil 45 and the tunnel face 37, and is tightly pressed around with angle steel pressing plates 40 and fixed by quick-connecting screws 41. Subsequently, cement slurry is poured into the grouting holes 42 for soft rock reinforcement. After installing the I-beam cross beam 47 on the steel trestle 4, a platform plate 39 and a ramp plate 38 are installed on the I-beam cross beam 47 for advanced jet grouting pile soft rock reinforcement construction.

[0027] The parts not detailed in this application are prior art, so they are not elaborated herein.

[0028] It can be understood that the term "a" should be construed as "at least one" or "one or more". That is, in one embodiment, the number of an element can be one, while in other embodiments, the number of the element can be multiple. The term "a" should not be construed as a limitation on the quantity.

[0029] Although terms such as are used more frequently 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; any interpretation of them as any additional limitation is contrary to the spirit of this application.

[0030] This application is not limited to the above best mode. Any person can derive other various forms of products under the inspiration of this application. However, no matter what changes are made in its shape or structure, as long as the technical solutions are the same as or similar to those of this application, they all fall within the protection scope of this application.

Claims

1. A rapid replacement mechanical grinding and cutting construction method for soft rock tunnels, characterized in that It includes the following steps: S00. Installation and positioning of the temporary inverted arch formwork system: A winch (12) and a controller control box (17) are successively installed on the steel trestle bridge (4); A pouring main pipe (13) and a sealing end (16), a pouring branch pipe (8) and a pouring branch pipe control rope (10) are installed under the steel trestle bridge (4). After the inverted arch formwork (3) is installed with a formwork linkage rod (9), it is installed on the cross beam at the bottom of the steel trestle bridge (4), and a controller (15) is installed. Finally, a formwork clamp (5) is installed; S10. Construction of the inverted arch (2): The controller (15) is turned on, the inverted arch formwork (3) is lowered to the designed height, and then the formwork clamp (5) is lowered. After the formwork fold angle (18) and the primary lining embedded plate (19) are fixed with bolts, the pouring branch pipe (8) is lowered, and then concrete is poured. When the slurry discharged from the exhaust hole (11) meets the requirements, the grouting is stopped; S20. Installation of the steel frame (22): The upper connecting plate (28) of the steel frame to be connected is placed on the quick-connect lower plate (36) of the previous steel frame. At the same time, a quick-connect rod (25) is placed in the quick-connect sleeve on the previous steel frame to complete the installation of the steel frame (22); S30. Installation of the temporary vertical support: A temporary vertical support (23) is installed in the top cross sleeve (35) of the steel frame (22). The height of the inner rod of the middle cross sleeve (34) is adjusted so that the temporary vertical support (23) reaches the tension state. Then, a shotcrete pipe is installed on the shotcrete auxiliary plate (27) for primary lining construction; S40. Construction of soft rock treatment: An assembled grouting stop wall (43) is installed on the core soil (45) and the tunnel face (37), and is tightly pressed around with angle steel pressing plates (40) and fixed by quick-connect screws (41). Then, cement slurry is poured into the grouting holes (42) for soft rock reinforcement. After an I-beam cross beam (47) is installed on the steel trestle bridge (4), a platform plate (39) and a slope plate (38) are installed on the I-beam cross beam (47) for advanced jet grouting pile soft rock reinforcement construction.

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

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

4. The rapid replacement mechanical grinding and cutting construction method for soft rock tunnels according to claim 1, characterized in that The temporary vertical support (23) of the steel frame is placed at the lower part of the steel frame (22), and a temporary vertical support base (20) is arranged at the bottom. A sleeve (21) is arranged on the temporary vertical support base (20), and the temporary vertical support (23) is arranged on the sleeve (21). A horizontal reinforcement brace (33) is arranged at the middle position of the temporary vertical support (23). Middle cross sleeves (34) are arranged at both ends of the horizontal reinforcement brace (33). A shotcrete auxiliary plate sleeve (26) is arranged on the top horizontal reinforcement brace (33). An auxiliary plate leg (32) is arranged in the shotcrete auxiliary plate sleeve (26). A shotcrete auxiliary plate (27) is arranged on the auxiliary plate leg (32). The shotcrete auxiliary plate (27) is spot-welded to the cross bar of the temporary vertical support (23). Horizontal trusses (29) are arranged in a staggered manner at the top of the temporary vertical support (23). Truss end plates (30) are arranged at the ends of the horizontal trusses (29) and are bolted to the truss connection plates (31) on the temporary vertical support (23). The top of the temporary vertical support (23) is connected to the top cross sleeve (35) on the steel frame (22).

5. The rapid replacement mechanical grinding and cutting construction method for soft rock tunnels according to claim 4, characterized in that, Quick-connection sleeves (24) and quick-connection rods (25) are arranged on the steel frame (22). A quick-connection upper plate (28) and a quick-connection lower plate (36) are arranged at the top. The two sides of the steel frame (22) are quickly connected through the quick-connection sleeves (24) and the quick-connection rods (25), and the top is quickly connected through the quick-connection upper plate (28), the quick-connection lower plate (36) and bolts.

6. The rapid replacement mechanical grinding and cutting construction method for soft rock tunnels according to claim 1, characterized in that, The assembled grout-stop wall (43) is placed in front of the tunnel face (37), and the lower part is closely attached to the core soil (45). The assembled grout-stop wall (43) is composed of two pieces, and a connection plate (44) is arranged between them. A profiled steel edge is arranged at the bottom (46). Angle steel pressing plates (40) are arranged around and are closely attached to the tunnel excavation edge line. Quick-connection screws (41) are arranged between the angle steel pressing plates (40) and the assembled grout-stop wall (43) for connection. Grouting holes (42) are evenly arranged on the assembled grout-stop wall (43).

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

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