A tunnel rapid support system and method during water diversion tunnel construction

Abstract

The present invention discloses a rapid tunnel support system for use during the construction of a water diversion tunnel, comprising a track assembly and a simple trolley capable of traveling on the track assembly, the simple trolley being provided with a steel formwork for tunnel support concrete pouring, and characterized in that: the track assembly comprises a first track and a second track, the first track and the second track being provided on either side of the tunnel, the simple trolley comprising a trolley section, the lateral dimension of the trolley section being less than half the tunnel width, the trolley section being provided with a connecting portion on the side close to the tunnel axis, the connecting portion being used to connect to the connecting portion of another trolley section, the trolley section being rotatable relative to the other trolley section about the connecting portion, in such a manner that the trolley section is transferred from the first track or the second track to the other track. The rapid tunnel support system of the present invention can operate continuously, supporting concrete pouring while excavating. The present invention also includes a rapid support method for the above-mentioned rapid tunnel support system.

Description

Technical Field

[0001] The invention relates to a rapid supporting method for a tunnel rapid supporting system. Background Art

[0002] After tunnel excavation, the original balance of the strata around the tunnel is destroyed, causing the tunnel to deform or collapse. In order to protect the stability of the surrounding rock and ensure safety, the tunnel must have a supporting structure of sufficient strength. Common lining forms include shotcrete lining, shotcrete anchor lining and, in most cases, composite lining. In a water diversion tunnel, the tunnel needs to be supported in a timely manner, usually using reinforced concrete. During the pouring of the supported cast concrete, a trolley or a simple trolley is required. The disadvantage is that the existing trolleys are used to pour on the entire cross-section of the tunnel. After pouring, it is necessary to wait for the concrete to be fully formed and removed from the formwork before the trolley can continue to move to the next section for operation. At the same time, the trolley and its support system occupy the clear height of the tunnel, making it difficult for large machinery or earth-moving vehicles to pass, affecting the tunnel excavation speed. Summary of the Invention

[0003] The object of the present invention is to provide a tunnel rapid support system capable of continuous operation. The object of the present invention also includes providing a rapid support method for the above-mentioned tunnel rapid support system.

[0004] The present invention sets the lateral dimension of the trolley sections that make up the simple trolley to be smaller than half of the tunnel width, and provides a connecting portion on the side of the trolley section close to the tunnel axis. The other trolley sections can be rotated through the connecting portion, so that the trolley sections can be transferred between the two tracks, so that the trolley sections at the rear can be transferred to the front for supporting operations. The trolley sections located between different tracks can be spaced a certain distance apart, and large machinery or earth-moving vehicles can pass through the channel, thereby realizing continuous and rapid support of the tunnel.

[0005] To this end, the present invention provides a rapid tunnel support system for a water diversion tunnel process, comprising a track device and a simple trolley that can travel on the track device, wherein the simple trolley is provided with a steel formwork for pouring tunnel support concrete, the track device comprises a first track and a second track, the first track and the second track are arranged on both sides of the tunnel, the simple trolley comprises a trolley section, the lateral dimension of the trolley section is less than half of the tunnel width dimension, the trolley section is provided with a connecting portion on the side close to the tunnel axis, the connecting portion is used to connect with the connecting portion of other trolley sections, the trolley section can rotate around the connecting portion relative to the other trolley section, in such a way that the trolley section is transferred from the first track or the second track to the other track.

[0006] Furthermore, the trolley section includes a transverse support rod and a longitudinal support rod, and the length of the transverse support rod is adjustable to adjust the transverse size of the trolley section.

[0007] Furthermore, the trolley section includes a wheel-rail system for traveling on tracks and a trackless wheel system, the trackless wheel system includes trackless wheels with steering devices and a lifting device, and the lifting device is used to adjust the height of the trackless wheels.

[0008] Furthermore, the wheel-rail system is provided with a lifting device for adjusting the height of the rail wheel.

[0009] Furthermore, the trolley section includes a liftable base, and the liftable base is used to support the main structure of the trolley section.

[0010] Furthermore, the upper surfaces of the first rail and the second rail are flush with the ground.

[0011] Furthermore, the connecting part includes a connecting ring, which is provided on the edge of two trolley sections for connecting to each other. The connecting part is provided with a connecting rod that connects the two connecting rings by passing through the center hole of the connecting ring. The connecting rod is fixed on one of the trolley sections. The length of the connecting rod is adjustable so that when the connecting rod passes through the two connecting rings that match each other, the two trolley sections are connected. When the connecting rod withdraws from the connecting ring, the trolley sections are separated.

[0012] The present invention includes a rapid support method for a tunnel rapid support system, comprising the following steps:

[0013] (1) Moving the trolley sections to predetermined positions of the first and second tracks via the track, carrying out construction of the supporting tunnel wall and pouring formwork concrete; connecting one or more trolley sections into a construction group, and reserving passages between construction groups on different tracks;

[0014] (2) After the trolley has poured the concrete in sections, it stays there until the concrete is formed;

[0015] (3) While the tunnel wall is being supported and the formwork concrete is being poured, tunnel excavation continues and earth and stone are transported out through the reserved passageway;

[0016] (4) After excavating one section, the demolded or new target trolley section behind the track is transferred between the first track and the second track and moved to the current area in front of the construction team for support and concrete pouring.

[0017] Furthermore, step (4) includes connecting the target trolley division with the adjacent trolley division through a connecting portion, adjusting the trackless wheels of the trackless wheel system of the target trolley division so that the rail wheels of the target trolley division are separated from the track, using a steering device and driving the target trolley division to rotate around the connecting portion relative to the adjacent trolley division to above another track, adjusting the height of the trackless wheels of the trackless wheel system of the target trolley division so that the rail wheels act on the track, moving the target trolley division forward along the track to be flush with the trolley division at the front of the construction group, and connecting with the adjacent trolley division to complete the track transfer to the target area.

[0018] Furthermore, the adjacent trolley sections adjust the liftable base to contact the ground for support, so that when the target trolley section in step (4) is connected with the adjacent trolley section for track transfer, the trolley section is supported.

[0019] The beneficial effects of the present invention are:

[0020] (1) The simple trolley of the present invention comprises trolley sections, and two trolley sections can be combined through a connecting portion to form a simple trolley for completing the formwork concrete construction of the entire section of the tunnel.

[0021] (2) The trolley section of the present invention can be used alone on one side of the tunnel to pour concrete. The rear trolley section is transferred between the tracks through the connecting part so that the rear trolley section passes over the trolley section that is stopped during the concrete forming period to the front for construction, so that the front area can carry out supporting concrete pouring in time. After the concrete pouring on this side of the tunnel is completed, concrete pouring is carried out on the other side.

[0022] (3) In an embodiment of the present invention, the size of the trolley section is adjustable. When the trolley section is transferred to the track through the connecting portion, the trolley section is shortened in its lateral dimension by adjusting the size, so that the shape and size of the trolley section are coordinated with the tunnel wall during rotation, thereby completing the transfer smoothly. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A schematic diagram of a simple trolley embodiment for implementing the present invention;

[0024] Figure 2 is a schematic diagram of an embodiment of a connecting portion;

[0025] Figure 3 for Figure 2 A top view of

[0026] Figure 4 It is a front view schematic diagram of the trolley sections connected by the connecting parts;

[0027] Figure 5 A top view schematic diagram of the movement of the trolley sections across the track;

[0028] Figure 6 This is a bird's-eye view of the construction teams set up on both sides of the tunnel.

[0029] Explanation of the accompanying symbols: 1. Simple trolley; 2. Trolley section; 201. Connecting end; 202. Horizontal support rod; 203. Vertical support rod; 204. Oblique support rod; 205. Trackless wheel; 206. Lifting device; 207. Track wheel; 208. Liftable base; 3. Steel formwork; 4. First track; 5. Second track; 6. Connecting part; 601. Connecting ring; 602. Connecting rod; 603. Center hole; 7. Passageway; 8. Work face; 9. Earth moving vehicle; 10. Bolt. DETAILED DESCRIPTION

[0030] In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined purpose of the invention, the specific implementation methods, structures, features and effects of the present invention are described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0031] Reference Figures 1 to 6As shown, a rapid tunnel support system in a water diversion tunnel process of the present invention includes a track device and a simple trolley 1 that can travel on the track device. The simple trolley 1 is provided with a steel formwork 3 for pouring tunnel support concrete. The track device includes a first track 4 and a second track 5. The first track 4 and the second track 5 are arranged on both sides of the tunnel. The simple trolley 1 includes a trolley section 2. The lateral dimension of the trolley section 2 is less than half of the tunnel width. The trolley section 2 is provided with a connecting portion 6 on the side close to the tunnel axis. The connecting portion 6 is used to connect with other trolley sections 2. The trolley section 2 can rotate around the connecting portion 6 relative to the other trolley section, so that the trolley section 2 is transferred from the first track 4 or the second track 5 to the other track. In this embodiment, a concrete nozzle is provided on the steel formwork 3, a concrete spray gun and a delivery pipe are provided on the simple trolley 1, the first track 4 and the second track 5 are each provided with two matching tracks, the steel formwork 3 provided on the trolley division 2 matches the shape of half of the tunnel, the trolley division 2 is close to the center of the tunnel as a connecting end 201, and components of the connecting part 6 are provided on both sides of the connecting end 201. The components of the connecting part 6 include a connecting ring 601, which is provided on the edges of the two ends of the connecting side of the two trolley divisions 2 for connecting to each other, and the connecting part 6 is provided with a center hole that can pass through the connecting ring 601. 603 is a connecting rod 602 connecting the two connecting rings 601. The connecting rod 602 is fixed to one of the trolley sections 2. The length of the connecting rod 602 is adjustable, so that when the connecting rod 602 passes through the two matching connecting rings 601, the two trolley sections 2 are connected. When the connecting rod 602 withdraws from the connecting rings 601, the trolley sections 2 are separated. The connecting rod 602 can be driven by a hydraulic device. In some other embodiments, the connecting part 6 can also include a shaft for rotational connection and fasteners and holes for fixing the two trolley sections 2. The fasteners can be bolts 10. The two trolley sections 2 are connected in a mirror-symmetrical manner with the tunnel centerline as the axis to form a simple trolley 1 that can completely construct a section of the tunnel. When the two trolley sections 2 are connected in a mirror-symmetrical manner with a plane perpendicular to the tunnel axis, a simple trolley 1 can also be formed.

[0032] In the above embodiment, referring to Figure 1As shown, the trolley section 2 includes a transverse support rod 202 and a vertical support rod 203. The length of the transverse support rod 202 is adjustable to adjust the transverse size of the trolley section 2. In this embodiment, the transverse support rod 202 is a length-adjustable support rod, such as a telescopic rod. The vertical support rod 203 is fixed to the transverse support rod 202, and the oblique support rod 204 is fixed to the transverse support rod 202. An adjustment slot may be provided on the vertical support rod 203. The oblique support rod 204 changes the length of the transverse support rod 202 by moving and fixing in the adjustment slot. When the trolley section 2 is performing construction work, the oblique support rod 204 is fixed to the vertical support rod 203 by bolts or other fasteners. In some other embodiments, a hydraulic device or an electric device can also be installed on the transverse support rod 202 to adjust the length of the transverse support rod 202. The transverse size of the trolley section 2 can be adjusted by adjusting the size of the transverse support rod 202, so that when the trolley section 2 is transferred across the track, the steel formwork 3 of the trolley section 2 will not collide or contact the tunnel wall.

[0033] In the above embodiment, referring to Figure 1 As shown, the trolley section 2 includes a wheel-rail system and a trackless wheel system for walking on the track. The trackless wheel system includes a trackless wheel 205 with a steering device and a lifting device 206. The lifting device 206 is used to adjust the height of the trackless wheel 205. When the trolley section 2 moves on the track, it uses the track wheel 207 in contact with the track to move. When the trolley section 2 is transferred across the track, the track wheel 207 needs to be separated from the track. At this time, the trackless wheel 205 of the trackless wheel system is lowered by the lifting device 206 and contacts the ground until the track wheel 207 is separated from the track. The trackless wheel 205 is driven to turn and move by the control drive system to complete the rotation and cross-track movement. When the track wheel 207 of the trolley section moves above the target track, the trackless wheel 205 is retracted by the lifting device 206, and the track wheel 207 is re-coordinated with the track to move.

[0034] In the above embodiment, the track wheel 207 is separated from the track by adjusting the trackless wheel 205, which will increase the overall height of the trolley section 2 to a certain extent, and it is necessary to adjust the steel template 3 accordingly. Figure 1 As shown, the wheel-rail system is provided with a lifting device 206 for adjusting the height of the track wheel 207. In this embodiment, the track wheel 207 and the trackless wheel 205 can be adjusted so that the track wheel 207 is separated from the track without increasing the height of the trolley section 2.

[0035] In the above embodiment, referring to Figure 1As shown, the trolley section 2 includes a liftable base 208, which is used to support the main structure of the trolley section 2. In this embodiment, the height-to-width ratio of the trolley section 2 is larger than that of the traditional simple trolley 1, and the provision of a base is beneficial to the stability of the main structure of the trolley section 2; secondly, during the cross-track transfer process of the trolley section 2, the adjacent trolley sections 2 are usually performing operations, and the trolley section is connected to the adjacent trolley section during the cross-track transfer process and rotates with its connection part 6 as the axis. The adjacent trolley section 2 will be subjected to a certain force. Therefore, when the trolley section 2 is performing construction operations, the base is lowered to form a support, which can ensure the stability of the construction process and the cross-track transfer process of the trolley section 2, and avoid affecting the construction quality.

[0036] In the above embodiment, referring to Figure 1 As shown, the upper surfaces of the first rail 4 and the second rail 5 are flush with the ground, which facilitates the cross-rail transfer of the trolley section 2 and the passage of other machinery.

[0037] The present invention also includes a rapid support method for the above-mentioned tunnel rapid support system, comprising the following steps:

[0038] (1) Move the trolley section 2 to the predetermined position of the first track 4 and the second track 5 via the track, carry out the construction of the supporting tunnel wall and pour the formwork concrete; connect several trolley sections 2 on the same side of the tunnel into a construction group, and reserve a passage 7 between them and the construction groups on different tracks;

[0039] (2) After the trolley section 2 pours the molded concrete, it stays there until the concrete is formed;

[0040] (3) While the tunnel wall is being supported and the formwork concrete is being poured, tunnel excavation continues and earth and stone are transported out through the reserved passage 7;

[0041] (4) After the excavation progresses to a certain point and the tunnel face 8 moves forward, the target trolley section 2 after demolding or the new target trolley section 2 at the rear of the track on the same side is transferred between the first track 4 and the second track 5 and moved to the target area in front of the construction team on the same side for initial support and concrete pouring.

[0042] In the above embodiment, referring to Figure 5 、 Figure 6As shown, when the two trolley divisions 2 are respectively set at the predetermined positions of the first track 4 and the second track 5 for construction work, the rear trolley division 2 can be transferred to the front of the trolley division 2 under construction by moving across the track for support and concrete pouring operations. At this time, several trolley divisions 2 on the same side can be connected to form a large construction group, which can also be regarded as a complete simple trolley 1. A passage 7 for earth-moving vehicles 9 or machinery to pass through is left between the two construction groups or two simple trolleys 1 on both sides of the tunnel. The trolley division 2 for demolding after the rear concrete is formed can be continuously disconnected from the simple trolley 1 and moved across the track to the front of the simple trolley 1 and connected to form a new simple trolley 1 to realize the dynamic advancement of the simple trolley 1, quickly complete the support of the tunnel and the pouring of cast concrete, and achieve excavation in one place and support in one place.

[0043] In the above embodiment, referring to Figure 5 、 Figure 6 As shown, step (4) includes connecting the target trolley division 2 with the adjacent trolley division 2 through the connecting portion 6, adjusting the trackless wheel 205 of the trackless wheel system of the target trolley division 2 so that the track wheel 207 of the target trolley division 2 is separated from the track, using the steering device and driving the target trolley division 2 to rotate around the connecting portion 6 relative to the adjacent trolley division 2 to above another track, adjusting the height of the trackless wheel 205 of the trackless wheel system of the target trolley division 2 so that the track wheel 207 acts on the track, moving the target trolley division 2 forward along the track to be flush with the trolley division 2 at the front of the construction group, and connecting with the adjacent trolley division 2 to complete the track transfer to the target area. After moving to the target area, refer to Figure 6 As shown, the trolley section 2 can be connected to the simple trolley 1 through fasteners or other connection methods to complete the main body connection, that is, the trolley section 2 is connected along the length direction of the tunnel.

[0044] In the above embodiment, referring to Figure 1 As shown, the adjacent trolley section 2 adjusts the liftable base 208 to contact the ground for support, so that the trolley section 2 is supported when the target trolley section 2 is connected with the adjacent trolley section 2 for track transfer in step (4).

[0045] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as above in terms of a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art can, without departing from the scope of the technical solution of the present invention, make some changes or modifications to equivalent embodiments using the technical contents disclosed above. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A rapid support method for a tunnel rapid support system, comprising a track device and a simple trolley capable of traveling on the track device, wherein the simple trolley is provided with a steel formwork for pouring tunnel support concrete, characterized in that: The track device includes a first track and a second track, the first track and the second track are arranged on both sides of the tunnel, the simple trolley includes a trolley section, the transverse dimension of the trolley section is less than half of the tunnel width, and the trolley section is provided with a connecting portion on a side close to the tunnel axis, the connecting portion is used to connect with the connecting portion of the other trolley section, and the trolley section can rotate relative to the other trolley section around the connecting portion, so that the trolley section is transferred from the first track or the second track to the other track; the method includes the following steps: (1) The trolley section is moved to the predetermined position of the first track and the second track via the track to carry out the construction of the supporting tunnel wall and pour the formwork concrete; several trolley sections located on the same side of the tunnel are connected into a construction group, and passages are reserved between the construction groups on different tracks; (2) After the trolley has poured the concrete in sections, it stays there until the concrete is formed; (3) While the tunnel wall is being supported and the formwork concrete is being poured, tunnel excavation continues and earth and stone are transported out through the reserved passageway; (4) After excavating one place, the target trolley section after demolding or the new one at the rear of the track on the same side is transferred between the first track and the second track to the current area in front of the construction group on the same side for support and concrete pouring: including connecting the target trolley section with the adjacent trolley section through the connecting part, adjusting the trackless wheels of the trackless wheel system of the target trolley section so that the rail wheels of the target trolley section are separated from the track, using the steering device and driving the target trolley section to rotate around the connecting part relative to the adjacent trolley section to above another track, adjusting the height of the trackless wheels of the trackless wheel system of the target trolley section so that the rail wheels act on the track, moving the target trolley section forward along the track until it is flush with the trolley section at the front of the construction group, and connecting with the adjacent trolley section to complete the track transfer to the target area.

2. A rapid support method for a tunnel rapid support system according to claim 1, characterized in that: The trolley section includes a transverse support rod and a longitudinal support rod, and the length of the transverse support rod is adjustable to adjust the transverse size of the trolley section.

3. The rapid support method of a tunnel rapid support system according to claim 2, characterized in that: The trolley section includes a wheel-rail system for traveling on rails and a trackless wheel system. The trackless wheel system includes trackless wheels with a steering device and a lifting device. The lifting device is used to adjust the height of the trackless wheels.

4. The rapid support method of a tunnel rapid support system according to claim 3, characterized in that: The wheel-rail system is provided with a lifting device for adjusting the height of the rail wheels.

5. A rapid support method for a tunnel rapid support system according to any one of claims 1 to 4, characterized in that: The trolley section includes a liftable base, and the liftable base is used to support the main structure of the trolley section.

6. A rapid support method for a tunnel rapid support system according to any one of claims 1 to 4, characterized in that: The upper surfaces of the first rail and the second rail are flush with the ground.

7. The rapid support method of a tunnel rapid support system according to claim 4, characterized in that: The connecting part includes a connecting ring, which is provided on the edge of two trolley sections for connecting to each other. The connecting part is provided with a connecting rod that connects the two connecting rings by passing through the center hole of the connecting ring. The connecting rod is fixed on one of the trolley sections. The length of the connecting rod is adjustable so that when the connecting rod passes through the two connecting rings that match each other, the two trolley sections are connected. When the connecting rod withdraws from the connecting ring, the trolley sections are separated.

8. The rapid support method of a tunnel rapid support system according to claim 1, characterized in that: The adjacent trolley sections adjust the liftable base to contact the ground for support, so that when the target trolley section in step (4) is connected with the adjacent trolley section for track transfer, the trolley section is supported.

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