Method for increasing width of tunnel construction

Abstract

The application discloses a method for increasing the width of a tunnel for vehicle meeting, which comprises the following steps: placing a steel structure platform on a tunnel entrance road surface; making the bottom plate close to the lining side wall of the tunnel and adjusting the length of the lifting hydraulic rod of the lifting hydraulic cylinder to make the parking platform plate be located at a certain height; horizontally moving the parking platform plate until the parking platform plate is close to the lining side wall of the tunnel and the side wall supporting shoe assembly is supported on the lining side wall of the tunnel; and adjusting the length of the telescopic hydraulic rod of the telescopic hydraulic cylinder to adjust the position of the lower longitudinal beam which is arranged away from the lining side wall and to support the parking platform plate. The method has the advantages that the width of the tunnel for vehicle meeting is increased by utilizing the recessed space of the lining side wall, the problem of difficult vehicle meeting in the process of single-line small-section tunnel excavation is solved, the load is dispersed by supporting the side wall supporting shoe assembly on the lining side wall, the gravity center of the steel structure platform is adjusted by the telescopic hydraulic cylinder, and the stability of the steel structure platform is ensured.

Description

Technical Field

[0001] This invention belongs to the technical field of tunnel construction, specifically relating to a method for tunnel construction that allows for large-scale adjustment to increase the passing width. Background Technology

[0002] With the rapid development of my country's economy, its infrastructure is also constantly evolving and improving. Due to complex terrain and geographical conditions, the construction of highways, railways, and other infrastructure necessitates the construction of numerous tunnels to meet production and living requirements. During tunnel construction, to shorten the construction period, excavation at the tunnel entrance requires the removal of rocks from the rear, necessitating frequent entry of various machinery such as dump trucks, excavators, and three-arm drilling rigs into the main tunnel to the working face. Because single-track tunnels have small clearance sections and narrow passageways, passing between vehicles is extremely difficult, causing inconvenience for cross-construction, severely impacting excavation progress, resulting in significant idle manpower, and increasing construction costs. Simultaneously, reduced muck removal efficiency compromises the timeliness of initial tunnel support, seriously affecting tunnel stability and the safety of construction personnel. However, the tunnel cross-section and road surface are fixed and cannot be altered; even after the tunnel connecting passages are completed, the need for passing between vehicles in certain sections of the main tunnel remains unresolved. Therefore, it is crucial to consider appropriate construction techniques to increase the passing width within single-track tunnels and address the difficulty of passing between vehicles within single-track tunnels. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of the prior art by providing a method for tunnel construction that allows for large-scale adjustment to increase the passing width of vehicles. A steel structure platform is placed on the tunnel entrance road surface. The steel structure platform consists of a front approach bridge, a main bridge, and a rear approach bridge. The height and width of the main bridge are adjustable, and the main bridge is supported on the lining sidewall using sidewall support boot assemblies. This increases the passing width of vehicles inside the tunnel and solves the problem of difficult vehicle passing during the excavation of single-line small-section tunnels.

[0004] The objective of this invention is achieved through the following technical solutions:

[0005] A method for tunnel construction that allows for large-scale adjustment to increase the passing width of vehicles, the method comprising the following steps:

[0006] (S1) A steel platform is placed on the tunnel entrance surface;

[0007] The steel structure platform includes a front approach bridge, a main bridge, and a rear approach bridge arranged sequentially along the longitudinal direction of the tunnel, as well as a sidewall support shoe assembly installed on the main bridge. The main bridge includes an upper longitudinal beam, a lower longitudinal beam, a lifting hydraulic cylinder, a parking platform plate, a bottom plate, and a telescopic hydraulic cylinder. There are two upper longitudinal beams and two lower longitudinal beams, arranged in a rectangular pattern. The upper and lower longitudinal beams are connected by the lifting hydraulic cylinder, and the upper and lower longitudinal beams are connected by the telescopic hydraulic cylinder. A longitudinal connecting plate is fixed to the top of the upper longitudinal beam located away from the lining sidewall, and an extension connecting plate is fixed to the top of the upper longitudinal beam located near the lining sidewall. The parking platform plate is slidably connected to the longitudinal connecting plate and the extension connecting plate. The lower longitudinal beam located near the lining sidewall is fixed to the bottom plate, and the lower longitudinal beam located away from the lining sidewall is slidably connected to the bottom plate.

[0008] (S2) Make the bottom plate fit tightly against the lining sidewall of the tunnel, and adjust the length of the lifting hydraulic rod of the lifting hydraulic cylinder so that the parking platform plate is at a certain height;

[0009] (S3) Move the parking platform plate horizontally until the parking platform plate is in close contact with the lining sidewall of the tunnel, and make the sidewall support shoe assembly support the lining sidewall of the tunnel.

[0010] (S4) Adjust the length of the telescopic hydraulic rod of the telescopic hydraulic cylinder to adjust the position of the lower longitudinal beam that is located away from the lining side wall, so as to support the parking platform plate.

[0011] The sidewall support boot assembly includes a rubber support boot, a hinge plate, an extension hydraulic cylinder, and a rotation hydraulic cylinder. The rubber support boot is installed on the outside of the hinge plate. Both ends of the hinge plate are hinged to the extension hydraulic rod of the extension hydraulic cylinder and the rotation hydraulic cylinder rod of the rotation hydraulic cylinder, respectively. The extension hydraulic cylinder is horizontally positioned and its base is fixed to the main bridge. The rotation hydraulic cylinder is inclined and its base is hinged to the main bridge. The extension hydraulic cylinder and the rotation hydraulic cylinder drive the hinge plate to move so that the rubber support boot is tightly attached to the tunnel lining sidewall.

[0012] Both the extension hydraulic cylinder and the rotation hydraulic cylinder are mounted on the upper longitudinal beam located near the lining sidewall. The upper longitudinal beam located near the lining sidewall has an extension hydraulic mounting hole for placing the extension hydraulic cylinder. The parking platform plate is connected to the extension hydraulic rod of the extension hydraulic cylinder through a steel support. The extension connecting plate has a slot that matches the steel support along the extension direction of the extension hydraulic rod.

[0013] Both the extended connecting plate and the lower longitudinal beam located away from the lining sidewall are provided with roller fixing grooves for installing rollers. The bottom of the parking platform plate and the top of the base plate are respectively provided with sliding grooves that cooperate with the rollers. The parking platform plate is moved by the extension hydraulic rod of the extension hydraulic cylinder, and the extension hydraulic rod of the telescopic hydraulic cylinder is driven to move the lower longitudinal beam located away from the lining sidewall, so that the rollers roll along the length direction of the sliding grooves, thereby realizing the sliding of the parking platform plate and the lower longitudinal beam located away from the lining sidewall.

[0014] Both the front approach bridge and the rear approach bridge consist of ramp longitudinal beams and ramp steel plates installed on the ramp longitudinal beams. Anti-slip strips are provided on the ramp steel plates of the front approach bridge and the rear approach bridge, as well as on the parking platform plate of the main bridge.

[0015] The advantages of this invention are:

[0016] (1) By utilizing the recessed space of the lining sidewall, the width of passing vehicles in the tunnel can be increased, thus solving the problem of difficult passing of vehicles during the excavation of a single-line small-section tunnel.

[0017] (2) The lifting hydraulic cylinder can be used to adjust and increase the width required for passing vehicles in the tunnel according to actual needs, and can meet the needs of passing vehicles in tunnels of various sizes and models.

[0018] (3) By using telescopic hydraulic cylinders and extension hydraulic cylinders, the width of the tunnel for passing vehicles can be further adjusted;

[0019] (4) The load can be distributed by supporting the side wall support boot assembly on the lining side wall, and the center of gravity of the steel structure platform can be adjusted by telescopic hydraulic cylinder to ensure the stability of the steel structure platform. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the steel structure platform of the present invention;

[0021] Figure 2 for Figure 1 Cross-sectional view of AA in the middle;

[0022] Figure 3 for Figure 2 Cross-sectional view of BB in the middle;

[0023] Figure 4 for Figure 2 Cross-sectional view of CC in China;

[0024] Figure 5 for Figure 2 Cross-sectional view of DD in the middle;

[0025] Figure 6 This is a schematic diagram illustrating the process of widening the road surface using the steel structure platform of the present invention.

[0026] like Figures 1-6 As shown in the figure, the labels represent:

[0027] 1. Steel structure platform; 2. Tunnel;

[0028] 11. Front approach bridge; 12. Main bridge; 13. Rear approach bridge; 14. Side wall support shoe assembly;

[0029] 111. Ramp longitudinal beam; 112. Ramp steel plate; 113. Anti-slip strip;

[0030] 121. Upper longitudinal beam, 122. Lower longitudinal beam, 123. Lifting hydraulic cylinder, 124. Longitudinal connecting plate, 125. Parking platform plate, 126. Base plate, 127. Telescopic hydraulic cylinder, 128. Telescopic hydraulic rod, 129. Sliding groove, 1210. Roller, 1211. Rolling fixing groove, 1212. Extended connecting plate, 1213. Slot, 1214. Extended hydraulic mounting hole;

[0031] 141. Rubber support shoe; 142. Hinge plate; 143. Hinge shaft; 144. Hinge shaft hole; 145. Extended hydraulic cylinder; 146. Extended hydraulic rod; 147. Steel support; 148. Rotating hydraulic cylinder; 149. Rotating hydraulic cylinder rod; 1410. Hinge seat; 1411. Rotating connecting plate.

[0032] 21. Road surface; 22. Lined sidewalls;

[0033] L. Original road width, ∆L. Increased passing width. Detailed Implementation

[0034] The features and other related features of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments, so as to facilitate understanding by those skilled in the art:

[0035] Example: Figures 1-6 As shown, this embodiment specifically relates to a method for tunnel construction that allows for large-scale adjustment to increase the passing width. This method mainly includes the following steps:

[0036] S1: Install a steel platform 1 on one side of the road surface 21 of tunnel 2.

[0037] Among them, such as Figures 1-5As shown, the steel structure platform 1 includes a front approach bridge 11, a main bridge 12, a rear approach bridge 13, and a side wall support shoe assembly 14. The front approach bridge 11, the main bridge 12, and the rear approach bridge 13 are arranged sequentially along the longitudinal direction of the tunnel 2. One end of the front approach bridge 11 and the rear approach bridge 13 are movably connected to both ends of the main bridge 12, respectively. The front approach bridge 11 and the rear approach bridge 13 are both inclined, while the main bridge 12 is horizontal. The front approach bridge 11 and the rear approach bridge 13 can serve as the ascending and descending channels for mechanical vehicles. That is, mechanical vehicles can move from the road surface 21 of the tunnel 2 to the main bridge 12 or from the main bridge 12 to the road surface 21 of the tunnel 2 via the front approach bridge 11 (rear approach bridge 13). The main bridge 12 is supported on the lining side wall 22 of the tunnel 2 by the side wall support shoe assembly 14.

[0038] The main bridge 12 includes upper longitudinal beams 121, lower longitudinal beams 122, lifting hydraulic cylinders 123, longitudinal connecting plates 124, parking platform plates 125, base plates 126, telescopic hydraulic cylinders 127, and extension connecting plates 1212. Two upper longitudinal beams 121 and two lower longitudinal beams 122 are each provided, arranged in a rectangular pattern. The upper longitudinal beams 121 and lower longitudinal beams 122 are connected by lifting hydraulic cylinders 123, which are used to adjust the height of the upper longitudinal beams 121. Telescopic hydraulic cylinders 127 and 128 are also used to connect the upper longitudinal beams 121 and lower longitudinal beams 122. 27 connection, the telescopic hydraulic rod 128 of the telescopic hydraulic cylinder 127 is used to adjust the distance between the upper longitudinal beam 121 (lower longitudinal beam 122). The top of the upper longitudinal beam 121, which is located away from the lining side wall 22, is fixed with a longitudinal connecting plate 124. The top of the upper longitudinal beam 121, which is located near the lining side wall 22, is fixed with an extension connecting plate 1212. The parking platform plate 125 is slidably connected to the longitudinal connecting plate 124 and the extension connecting plate 1212. The lower longitudinal beam 122, which is located near the lining side wall 22, is fixed on the base plate 126. The lower longitudinal beam 122, which is located away from the lining side wall 22, is slidably connected to the base plate 126.

[0039] The telescopic hydraulic rod 128 of the telescopic hydraulic cylinder 127 drives the lower longitudinal beam 122, which is located away from the lining sidewall 22, to slide. An extension hydraulic mounting hole 1214 for placing an extension hydraulic cylinder 145 is provided on the upper longitudinal beam 121, which is located near the lining sidewall 22. The extension hydraulic cylinder 145 is horizontally arranged, and its base is fixed in the extension hydraulic mounting hole 1214. The extension hydraulic rod 146 of the extension hydraulic cylinder 145 extends to the outside of the extension hydraulic mounting hole 1214. The parking platform plate 125 is connected to the extension hydraulic rod 146 of the extension hydraulic cylinder 145 via steel support 147. The extension hydraulic rod 146 of the extension hydraulic cylinder 145 drives the parking platform plate 125 to slide. The extension connecting plate 1212 has a slot 1213 that matches the steel support 147 along the extension direction of the extension hydraulic rod 146, which serves as a guide. In this embodiment, each extension hydraulic rod 146 is connected to two steel supports 147, one of which is vertically arranged and the other is inclined. Both the extension connecting plate 1212 and the lower longitudinal beam 122 located away from the lining side wall 22 are provided with roller fixing grooves 1211 for installing rollers 1210. Correspondingly, the bottom of the parking platform plate 125 and the top of the base plate 126 are respectively provided with sliding grooves 129 that cooperate with rollers 1210. Rollers 1210 can roll along the length of the sliding grooves 129 to realize the sliding of the parking platform plate 125 and the lower longitudinal beam 122 located away from the lining side wall 22.

[0040] The sidewall support boot assembly 14 includes a rubber support boot 141, a hinge plate 142, an extension hydraulic cylinder 145, and a rotation hydraulic cylinder 148. The rubber support boot 141 is installed on the outside of the hinge plate 142. The extension hydraulic rod 146 of the extension hydraulic cylinder 145 and the upper end of the hinge plate 142 are both provided with hinge shaft holes 144. The hinge shaft 143 is installed in the hinge shaft hole 144, realizing the hinge connection between the extension hydraulic rod 146 of the extension hydraulic cylinder 145 and the upper end of the hinge plate 142. The rotating hydraulic cylinder 148 is inclined. Both the lower ends of the rotating hydraulic cylinder rod 149 and the hinge plate 142 of the rotating hydraulic cylinder 148 are provided with hinge shaft holes 144. The hinge shaft 143 is installed in the hinge shaft hole 144, realizing the hinge connection between the rotating hydraulic cylinder rod 149 and the lower end of the hinge plate 142 of the rotating hydraulic cylinder 148. A rotating connecting plate 1411 is provided on the base of the rotating hydraulic cylinder 148. A hinge seat 1410 is provided on the upper longitudinal beam 121 near the lining side wall 22. Both the hinge seat 1410 and the rotating connecting plate 1411 are provided with hinge shaft holes 144. The hinge shaft 143 is installed in the hinge shaft hole 144, realizing the hinge connection between the base of the rotating hydraulic cylinder 148 and the upper longitudinal beam 121 near the lining side wall 22. The extension hydraulic cylinder 145 and the rotation hydraulic cylinder 148 drive the hinge plate 142 to move so that the rubber support shoe 141 is in close contact with the lining sidewall 22 of the tunnel 2, thereby supporting the main bridge 12.

[0041] Both the front approach bridge 11 and the rear approach bridge 13 are composed of ramp longitudinal beams 111 and ramp steel plates 112 installed on the ramp longitudinal beams 111. Anti-slip strips 113 are provided on the ramp steel plates 112 of the front approach bridge 11 and the rear approach bridge 13 as well as on the parking platform plate 125 of the main bridge 12. The anti-slip strips 113 can increase the friction of the bridge surface of the front approach bridge 11, the main bridge 12 and the rear approach bridge 13, and facilitate the movement of mechanical vehicles.

[0042] S2: Make the bottom plate 126 fit tightly against the lining sidewall 22 of the tunnel 2, and adjust the length of the lifting hydraulic rod of the lifting hydraulic cylinder 123 so that the parking platform plate 125 is at a certain height.

[0043] S3: Move the parking platform 125 horizontally until the parking platform 125 is in close contact with the lining sidewall 22 of the tunnel 2, and make the sidewall support shoe assembly 14 support the lining sidewall 22 of the tunnel 2.

[0044] Specifically, the extension hydraulic rod 146 of the extension hydraulic cylinder 145 drives the parking platform plate 125 to move, so that the parking platform plate 125 is in close contact with the lining sidewall 22 of the tunnel 2. At the same time, the hinge plate 142 also moves, and the rotation hydraulic cylinder rod 149 of the rotation hydraulic cylinder 148 drives the hinge plate 142 to move, so that the rubber support shoe 141 is in close contact with the lining sidewall 22 of the tunnel 2 (the shape of the rubber support shoe 141 matches the shape of the lining sidewall 22 of the tunnel 2), thus achieving support for the main bridge 12.

[0045] S4: Adjust the length of the telescopic hydraulic rod 128 of the telescopic hydraulic cylinder 127 to adjust the position of the lower longitudinal beam 122 located away from the lining sidewall 22, so as to support the parking platform plate 125.

[0046] Among them, such as Figure 6 As shown, the original width of the road surface in tunnel 2 was the original road surface width L. The steel structure platform 1 can use the recessed space of the lining sidewall 22 to widen the road surface for passing vehicles, where the increased passing width is ∆L.

[0047] The beneficial effects of this embodiment are:

[0048] (1) By utilizing the recessed space of the lining sidewall, the width of passing vehicles in the tunnel can be increased, thus solving the problem of difficult passing of vehicles during the excavation of a single-line small-section tunnel.

[0049] (2) The lifting hydraulic cylinder can be used to adjust and increase the width required for passing vehicles in the tunnel according to actual needs, and can meet the needs of passing vehicles in tunnels of various sizes and models.

[0050] (3) By using telescopic hydraulic cylinders and extension hydraulic cylinders, the width of the tunnel for passing vehicles can be further adjusted;

[0051] (4) The load can be distributed by supporting the side wall support boot assembly on the lining side wall, and the center of gravity of the steel structure platform can be adjusted by telescopic hydraulic cylinder to ensure the stability of the steel structure platform.

[0052] Although the above embodiments have described the concept and embodiments of the present invention in detail with reference to the accompanying drawings, those skilled in the art will recognize that various improvements and modifications can still be made to the present invention without departing from the scope of the claims, and therefore will not be elaborated here.

Claims

1. A method for tunnel construction that allows for large-scale adjustment to increase the passing width, characterized in that... The method includes the following steps: (S1) A steel platform is placed on the tunnel entrance surface; The steel structure platform includes a front approach bridge, a main bridge, and a rear approach bridge arranged sequentially along the longitudinal direction of the tunnel, as well as a sidewall support shoe assembly installed on the main bridge. The main bridge includes an upper longitudinal beam, a lower longitudinal beam, a lifting hydraulic cylinder, a parking platform plate, a bottom plate, and a telescopic hydraulic cylinder. There are two upper longitudinal beams and two lower longitudinal beams, arranged in a rectangular pattern. The upper and lower longitudinal beams are connected by the lifting hydraulic cylinder, and the upper and lower longitudinal beams are connected by the telescopic hydraulic cylinder. A longitudinal connecting plate is fixed to the top of the upper longitudinal beam located away from the lining sidewall, and an extension connecting plate is fixed to the top of the upper longitudinal beam located near the lining sidewall. The parking platform plate is slidably connected to the longitudinal connecting plate and the extension connecting plate. The lower longitudinal beam located near the lining sidewall is fixed to the bottom plate, and the lower longitudinal beam located away from the lining sidewall is slidably connected to the bottom plate. (S2) Make the bottom plate fit tightly against the lining sidewall of the tunnel, and adjust the length of the lifting hydraulic rod of the lifting hydraulic cylinder so that the parking platform plate is at a certain height; (S3) Move the parking platform plate horizontally until the parking platform plate is in close contact with the lining sidewall of the tunnel, and make the sidewall support shoe assembly support the lining sidewall of the tunnel. (S4) Adjust the length of the telescopic hydraulic rod of the telescopic hydraulic cylinder to adjust the position of the lower longitudinal beam that is located away from the lining sidewall, so as to support the parking platform plate; The sidewall support boot assembly includes a rubber support boot, a hinge plate, an extension hydraulic cylinder, and a rotation hydraulic cylinder. The rubber support boot is installed on the outside of the hinge plate. The two ends of the hinge plate are respectively hinged to the extension hydraulic rod of the extension hydraulic cylinder and the rotation hydraulic cylinder rod of the rotation hydraulic cylinder. The extension hydraulic cylinder is horizontally set and its base is fixed on the main bridge. The rotation hydraulic cylinder is inclined and its base is hinged to the main bridge. The extension hydraulic cylinder and the rotation hydraulic cylinder drive the hinge plate to move so that the rubber support boot is in close contact with the tunnel lining sidewall. Both the extension hydraulic cylinder and the rotation hydraulic cylinder are mounted on the upper longitudinal beam located near the lining sidewall. The upper longitudinal beam located near the lining sidewall has an extension hydraulic mounting hole for placing the extension hydraulic cylinder. The parking platform plate is connected to the extension hydraulic rod of the extension hydraulic cylinder through a steel support. The extension connecting plate has a slot that matches the steel support along the extension direction of the extension hydraulic rod.

2. The method for tunnel construction with large-scale adjustment to increase the passing width according to claim 1, characterized in that... Both the extended connecting plate and the lower longitudinal beam located away from the lining sidewall are provided with roller fixing grooves for installing rollers. The bottom of the parking platform plate and the top of the base plate are respectively provided with sliding grooves that cooperate with the rollers. The parking platform plate is moved by the extension hydraulic rod of the extension hydraulic cylinder, and the extension hydraulic rod of the telescopic hydraulic cylinder is driven to move the lower longitudinal beam located away from the lining sidewall, so that the rollers roll along the length direction of the sliding grooves, thereby realizing the sliding of the parking platform plate and the lower longitudinal beam located away from the lining sidewall.

3. The method for tunnel construction with large-scale adjustment to increase the passing width according to claim 1, characterized in that... Both the front approach bridge and the rear approach bridge consist of ramp longitudinal beams and ramp steel plates installed on the ramp longitudinal beams. Anti-slip strips are provided on the ramp steel plates of the front approach bridge and the rear approach bridge, as well as on the parking platform plate of the main bridge.

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