Pipe following structure of shallow-buried weak surrounding rock tunnel advance pipe shed

Abstract

The utility model relates to the field of tunnel construction, and discloses a pipe following structure of a shallow-buried weak surrounding rock tunnel advanced pipe shed, which comprises a bottom frame, a left vertical plate and a right vertical plate are respectively arranged at two ends of the top surface of the bottom frame, a moving plate is arranged between the left vertical plate and the right vertical plate, and a sleeve is arranged between the moving plate and the right vertical plate in a penetrating manner; first connecting plates are arranged on the outer walls of the four sides of the moving plate, threaded rods are arranged at the two ends of each first connecting plate in a penetrating mode, arc-shaped plates are connected to the bottom ends of the threaded rods through bearings, second connecting plates are arranged on the outer walls of the four sides of the right vertical plate, side plates are arranged on the outer walls of the two sides of each second connecting plate, and a rolling wheel is connected between every two opposite side plates through a shaft rod; a knob is arranged at the top end of the threaded rod; the problems that the rock mass void ratio is high, rock soil collapses, and hole forming is not easy can be solved, one-time drilling and pipe laying are adopted, the pipe pushing work after hole drilling is omitted, the hole forming speed is high, operation is easy, construction is convenient, the work rate is high, and the construction cost is saved.

Description

Technical Field

[0001] This application relates to the field of tunnel construction, and in particular to a pipe-following structure for an advanced pipe roof in a shallow-buried soft surrounding rock tunnel. Background Technology

[0002] In areas with shallowly buried tunnel entrances and unfavorable geological conditions such as weak and fractured rock masses, fluid clay, karst-filled mudflats, or quicksand, the surrounding rock has extremely poor self-stabilizing capacity. When using ordinary down-the-hole drilling and pipe-driving methods, borehole wall collapses are likely to occur, or even sudden water and mud inrushes, causing great difficulties for construction, resulting in high project costs, long construction time, and failure to meet design requirements for pipe roof construction quality. When encountering fluid clay during tunnel pre-roof construction, which is connected to groundwater and surface water, borehole wall collapses are likely to occur repeatedly. After analysis and comparison, the horizontal directional pipe-driving method was found to effectively solve the problem of difficult borehole formation in mudflat geology. Utility Model Content

[0003] To address the challenge of drilling in muddy geology, this application provides a pipe-following structure for advanced pipe roofs in shallow-buried soft surrounding rock tunnels.

[0004] The following technical solution is adopted for the pipe-supporting structure of the pre-pipe roof in a shallow-buried soft surrounding rock tunnel:

[0005] A pipe-supporting structure for a shallow-buried soft rock tunnel pre-pipe roof includes a base frame. A left vertical plate and a right vertical plate are respectively provided at both ends of the top surface of the base frame. A movable plate is provided between the left and right vertical plates. A sleeve passes through the movable plate and the right vertical plate. First connecting plates are provided on all four outer walls of the movable plate. Threaded rods pass through both ends of the first connecting plates. An arc-shaped plate is connected to the bottom end of the threaded rod via a bearing. Second connecting plates are provided on all four outer walls of the right vertical plate. Side plates are provided on both outer walls of the second connecting plates. Rollers are connected between opposing side plates via shafts.

[0006] Preferably, the top of the threaded rod is provided with a knob.

[0007] Preferably, hydraulic cylinders are provided at the four corners of the side wall opposite to the moving plate of the left upright plate. The output end of the hydraulic cylinder passes through the left upright plate and extends outward to connect with the moving plate.

[0008] Preferably, the base frame has two guide rods inside, and each of the two guide rods has a movable block fitted on its outer wall. The two movable blocks are connected to the movable plate.

[0009] Preferably, one end of the sleeve is internally provided with a shoe, the front end of the shoe is provided with a reamer ring, the inside of the reamer ring is provided with a concentric drill, the inner wall of the reamer ring is provided with four circumferential equidistant clamping grooves, and the outer wall of the concentric drill is provided with four circumferential equidistant clamping blocks.

[0010] In summary, the present application has the following beneficial technical effects:

[0011] By rotating the knob, the rotation of the knob drives the threaded rod to move towards the sleeve, and the movement of the threaded rod drives the arc-shaped plates to move. The eight arc-shaped plates can clamp and fix the sleeve. The output end of the hydraulic cylinder drives the moving plate and the moving block to move along the horizontal direction of the guide rod towards the right vertical plate, completing the pipe following operation of the sleeve. Each sleeve is 1-1.5 meters long. After drilling a 1-1.5 meter sleeve, the next sleeve is connected, and so on until the drilling depth reaches 40 meters. Each sleeve is connected by a thread, which can solve the problems of high rock porosity, rock and soil collapse, and difficulty in forming a hole. The drilling and pipe laying are completed at one time, eliminating the need for pushing the pipe after drilling, and the hole forming speed is fast, the operation is simple, the construction is convenient, the work rate is high, and the construction cost is saved. BRIEF DESCRIPTION OF DRAWINGS

[0012] Fig. 1 is a structural front view of the application embodiment;

[0013] Fig. 2 is a structural side view of the application embodiment;

[0014] Fig. 3 is a structural schematic view of the concentric drill of the application embodiment.

[0015] BRIEF DESCRIPTION OF DRAWINGS 1, chassis; 2, guide rod; 3, left vertical plate; 4, hydraulic cylinder; 5, moving plate; 6, moving block; 7, right vertical plate; 8, sleeve; 9, first connecting plate; 10, knob; 11, threaded rod; 12, arc-shaped plate; 13, second connecting plate; 14, side plate; 15, roller; 16, reamer ring; 17, clamping groove; 18, concentric drill; 19, clamping block; 20, shoe. DETAILED DESCRIPTION

[0016] The following will be described in detail in combination with the accompanying Figs. 1-3 The application will be further described in detail.

[0017] The application embodiment discloses a pipe following structure of an advanced pipe shed of a shallow-embedded soft surrounding rock tunnel, referring to Figs. 1-2The utility model relates to a kind of drilling machine, including chassis 1, the top surface of chassis 1 is respectively fixed with left vertical plate 3 and right vertical plate 7 at both ends, mobile plate 5 is equipped between left vertical plate 3 and right vertical plate 7, sleeve 8 is movably arranged between mobile plate 5 and right vertical plate 7, first connecting plate 9 is fixed on the four sides outer wall of mobile plate 5, threaded rod 11 is threadedly arranged at both ends of first connecting plate 9, arc plate 12 is connected by bearing at the bottom end of threaded rod 11, knob 10 is fixed at the top end of threaded rod 11, second connecting plate 13 is fixed on the four sides outer wall of right vertical plate 7, side plate 14 is fixed on the both sides outer wall of second connecting plate 13, roller 15 is movably connected between opposite two side plates 14, hydraulic cylinder 4 is arranged at the four corners of the opposite side of mobile plate 5 of left vertical plate 3, and the output end of hydraulic cylinder 4 is fixedly connected with mobile plate 5 by penetrating left vertical plate 3 and extending outward, two guide rods 2 are fixed in the inside of chassis 1, moving block 6 is slidably arranged on the outer wall of two guide rods 2, two moving blocks 6 are fixedly connected with mobile plate 5, by rotating knob 10, the rotation of knob 10 drives threaded rod 11 to move towards the direction of sleeve 8, the movement of threaded rod 11 drives arc plate 12 to move, sleeve 8 can be clamped and fixed by eight arc plates 12, and the output end of hydraulic cylinder 4 drives mobile plate 5 and moving block 6 to move along the horizontal direction of guide rod 2 towards the direction of right vertical plate 7, to complete the casing operation of sleeve 8, and each sleeve 8 is 1-1.5 meters long, after drilling a section of 1-1.5 meters sleeve 8, connect the next sleeve 8, drill to 40 meters by analogy, each sleeve 8 is connected by screw thread, can solve the problem of high rock mass void ratio, rock and soil collapse, not easy to form hole and other problems.

[0018] Referring to Fig. 3 One end of sleeve 8 is internally screw-connected with pipe shoe 20, reaming ring 16 is fixed at the front end of pipe shoe 20, concentric drilling tool 18 is arranged in the inside of reaming ring 16, four circumferential equidistant clamping grooves 17 are formed in the inner wall of reaming ring 16, four circumferential equidistant clamping blocks 19 are arranged on the outer wall of concentric drilling tool 18, clamping blocks 19 are matched and connected with clamping grooves 17, when drilling to the designed length, reverse rotate concentric drilling tool 18, then separate concentric drilling tool 18 from sleeve 8, then take concentric drilling tool 18 out of hole, leave sleeve 8, reaming ring 16 and pipe shoe 20 in hole.

[0019] The implementation principle of the follow-up pipe structure of the advanced pipe shed of the shallow-buried soft surrounding rock tunnel of the embodiment of the application is as follows: in use, the rotating knob 10 is rotated, the rotating knob 10 drives the threaded rod 11 to move towards the direction of the sleeve pipe 8, the movement of the threaded rod 11 drives the arc-shaped plates 12 to move, the sleeve pipe 8 can be clamped and fixed through the eight arc-shaped plates 12, the output end of the hydraulic cylinder 4 drives the moving plate 5 and the moving block 6 to move along the horizontal direction of the guide rod 2 towards the direction of the right vertical plate 7, the follow-up pipe operation of the sleeve pipe 8 is completed, each sleeve pipe 8 is 1-1.5 meters long, one 1-1.5 meter sleeve pipe 8 is drilled in, then the next sleeve pipe 8 is connected, and the drilling is continued to 40 meters in this way, when the drilling reaches the designed length, the concentric drill 18 is reversely rotated, the concentric drill 18 can be separated from the sleeve pipe 8, then the concentric drill 18 is all lifted out of the hole, and the sleeve pipe 8, the reaming ring 16 and the pipe shoe 20 are left in the hole.

[0020] Finally, it should be pointed out that: first, in the description of the application, it should be pointed out that, unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, which can be mechanical connection or electrical connection, or the communication between two elements, or direct connection, "up", "down", "left", "right" and the like are only used to indicate the relative positional relationship, when the absolute position of the described object changes, the relative positional relationship may change;

[0021] Secondly: the utility model discloses the embodiment of the drawings, only relate to the structure involved in the embodiment of the present disclosure, other structures can refer to the usual design, in the case where there is no conflict, the same embodiment and different embodiments of the utility model can be combined with each other.

[0022] Finally: the above only for the preferred embodiment of the utility model, and does not limit the utility model, any modification, equivalent replacement, improvement and the like made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

[0023] The above are the preferred embodiments of the application, and do not limit the protection scope of the application, so: any equivalent change made according to the structure, shape, principle of the application should be covered in the protection scope of the application.

Claims

1. A follow-up structure of an advanced pipe roof of a shallow-buried soft surrounding rock tunnel, comprising a chassis (1), characterized in that: The top surface of the chassis (1) is respectively provided with a left vertical plate (3) and a right vertical plate (7), a moving plate (5) is arranged between the left vertical plate (3) and the right vertical plate (7), a sleeve pipe (8) is arranged between the moving plate (5) and the right vertical plate (7), a first connecting plate (9) is arranged on the four outer walls of the moving plate (5), a threaded rod (11) is arranged at both ends of the first connecting plate (9), an arc-shaped plate (12) is connected to the bottom end of the threaded rod (11) through a bearing, a second connecting plate (13) is arranged on the four outer walls of the right vertical plate (7), a side plate (14) is arranged on the outer walls of the second connecting plate (13), and a roller (15) is connected between the two opposite side plates (14) through a shaft rod.

2. The follow-up structure of the advance pipe roof of the shallow- buried soft surrounding rock tunnel according to claim 1, characterized in that: The top end of the threaded rod (11) is provided with a rotating knob (10).

3. The follow-up structure of the advance pipe roof of the shallow- buried soft surrounding rock tunnel according to claim 1, characterized in that: The four corners of the wall opposite to the moving plate (5) of the left vertical plate (3) are respectively provided with a hydraulic cylinder (4), the output end of the hydraulic cylinder (4) penetrates through the left vertical plate (3) and extends outward to be connected with the moving plate (5).

4. The follow-up structure of the advance pipe roof of the shallow- buried soft surrounding rock tunnel according to claim 1, characterized in that: The inside of the chassis (1) is provided with two guide rods (2), the outer walls of the two guide rods (2) are respectively provided with a moving block (6), and the two moving blocks (6) are connected with the moving plate (5).

5. The follow-up structure of the advance pipe roof of the shallow- buried soft surrounding rock tunnel according to claim 1, characterized in that: One end of the sleeve pipe (8) is internally provided with a pipe shoe (20), the front end of the pipe shoe (20) is provided with a reaming ring (16), the inside of the reaming ring (16) is provided with a concentric drilling tool (18), the inner wall of the reaming ring (16) is provided with four circumferentially equidistant clamping grooves (17), the outer wall of the concentric drilling tool (18) is provided with four circumferentially equidistant clamping blocks (19), and the clamping blocks (19) are connected with the clamping grooves (17) in a matched mode.

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