Portable anchor cable drilling construction rock fault bridging device and bridging method

Abstract

The invention provides a portable anchor cable drilling construction rock fault bridging device and a bridging method.The device comprises a bridging net cage, a rubber plug is arranged at one end of the bridging net cage, a sponge is arranged at the other end of the bridging net cage, and expansion bags wrap the outer sides of the bridging net cage and the sponge and the outer edge of the rubber plug; the portion, close to one side of the sponge, of the expansion bag is arranged in a folded mode, two penetrating holes are formed in the rubber plug, a long pipe and a short pipe are arranged in the penetrating holes in a penetrating mode respectively, the long pipe and the short pipe are fixed through a fixing support and provided with water stop valves, and the long pipe and the short pipe are exhaust pipes or grouting pipes. The folding expansion bag is gradually expanded under the action of grouting pressure, so that an anchor cable drill hole forms a relatively closed space in a rock fault, the closed space can enable a drill rod to quickly penetrate through the rock fault, and the problems of drill rod air leakage and drill jamming in rock fault anchor cable drill hole construction are effectively solved; and meanwhile, during backfill grouting of the anchor cable hole, the closed space also solves the problem of slurry leakage, the drilling efficiency and the construction quality are improved, and the construction cost is reduced.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of rock slope, rock tunnel and underground space support construction, and particularly relates to a portable anchor cable drilling construction rock fault bridging device and a bridging method. BACKGROUND

[0002] The prestressed anchor cable is an important component for reinforcing the main body of a water conservancy and hydropower project, which transmits the force of unstable rock to stable rock mass, so that the unstable rock mass is in a stable state, and has the characteristics of high safety, convenient construction, long life cycle and the like, and is widely used in rock engineering such as water conservancy and hydropower projects, mines, tunnels, bridge foundations and the like.

[0003] In a complex geological environment, the working condition of the anchor cable hole penetrating the rock mass fault occurs from time to time. When drilling through the rock mass fault, the drill bit of the traditional pneumatic rock drill is prone to air leakage and sticking, which causes the drill rod to be unable to drill, and the construction progress is slow. In addition, the rock mass fault also causes the anchor cable hole backfill grouting to be not dense, which affects the construction quality. At present, for a small rock fissure broken layer, the traditional grouting and casing pipe technology can ensure the continuous drilling of the pneumatic rock drill. However, when facing a large rock mass fault, the material consumption caused by grouting is large, the construction period is uncontrollable, and the cost caused by casing pipe construction is high, which leads to the fact that the existing technology cannot be directly applied to the anchor cable drilling construction penetrating the rock mass fault. SUMMARY

[0004] The first object of the present application is to provide a portable anchor cable drilling construction rock fault bridging device in view of the above-mentioned problems.

[0005] To achieve the above object, the present application adopts the following technical solutions:

[0006] A portable anchor cable drilling construction rock fault bridging device, comprising a bridging net cage, one end of the bridging net cage is provided with a rubber plug, the other end of the bridging net cage is provided with a sponge, the outer side of the bridging net cage and the outer edge of the rubber plug are wrapped with an expansion bag, the part of the expansion bag near the sponge is arranged in a folded shape, two through holes are formed in the rubber plug, a long pipe and a short pipe are respectively arranged in the through holes, the long pipe and the short pipe are fixed by a fixed support, a water stop valve is arranged on the long pipe and the short pipe, and the long pipe and the short pipe are exhaust pipes or grouting pipes.

[0007] While the above technical solutions are adopted, the present application can also adopt or combine the following technical solutions:

[0008] As a preferred technical solution of the present application: the bridging net cage is made of a wire mesh roll and welded, and is divided into a top part, a middle part and a bottom part, the middle part is divided into a large diameter section and a small diameter section, and the length of the large diameter section is greater than the length of the small diameter section.

[0009] As a preferred technical solution of the present invention: the bridging cage has a slurry-permeable function.

[0010] As a preferred technical solution of the present invention: the rubber plug is bonded to the end of the bridging mesh cage, and the rubber plug is in a truncated cone shape.

[0011] As a preferred technical solution of the present invention: the sponge is bonded to the end of the bridging cage.

[0012] As a preferred technical solution of the present invention: the expansion bag is made of wear-resistant, high-strength, and retractable polyethylene material.

[0013] As a preferred technical solution of the present invention: when the anchor hole is inclined downward, the short pipe is an exhaust pipe and the long pipe is a grouting pipe;

[0014] When the anchor hole is tilted upward, the long pipe is the exhaust pipe and the short pipe is the grouting pipe;

[0015] When the anchor hole is horizontal, the fixed bracket controls the long and short pipes to keep them vertical. At this time, the upper pipe is the exhaust pipe and the lower pipe is the grouting pipe. There is no position requirement for the long and short pipes.

[0016] As a preferred technical solution of the present invention: the fixed bracket includes a connecting rod, a wooden plug, a handle, a connecting rod bracket, a grouting pipe and an exhaust pipe slot, the wooden plug is provided with four through-holes, which are respectively used to pass through a long tube, a short tube and a connecting rod, the connecting rod bracket is arranged between two connecting rods, the grouting pipe and the exhaust pipe slot are provided with two through-holes and two slots, the connecting rod is passed through the through-hole, and the long tube and the short tube are passed through the slot.

[0017] As a preferred technical solution of the present invention: the wooden plug is arranged between the fixing bracket and the anchor cable hole.

[0018] The second object of the present invention is to provide a portable anchor cable drilling construction rock fault bridging method.

[0019] To this end, the above-mentioned purpose of the present invention is achieved through the following technical solutions:

[0020] A portable anchor cable drilling method for rock fault bridging is provided, the method being based on the aforementioned device and comprising the following steps:

[0021] S1. Determine the total length of the bridging cage and the length of the small diameter section of the bridging cage according to the width of the rock fault, and determine the large and small diameters of the bridging cage according to the diameter of the anchor hole, ensuring that the bridging cage can move freely in the anchor hole and can be folded to store enough expansion bags for filling;

[0022] S2, material preparation: bridge net cage, expansion bag, sponge, rubber plug, grouting pipe, exhaust pipe, water stop valve, fixed support;

[0023] S3, welding the bridge net cage, and sequentially bonding the sponge, rubber plug and expansion bag around it, and the expansion bag is sealed to leave only two holes on the rubber plug.

[0024] S4, installing the grouting pipe and the exhaust pipe.

[0025] S5, fixing the grouting pipe and the exhaust pipe by using the clamping slots of the grouting pipe and the exhaust pipe, and sending the bridge device into the anchor hole until reaching the rock fracture surface, at this time, installing the wooden plug at the anchor hole opening to fix the grouting bridge device fixed support in the anchor hole;

[0026] S6, selecting the grouting pipe and the exhaust pipe according to the inclination of the anchor hole, opening the water stop valve of the exhaust pipe before grouting, opening the water stop valve of the grouting pipe, and closing the water stop valve of the exhaust pipe when the exhaust pipe discharges the slurry;

[0027] S7, stopping grouting and closing the water stop valve of the grouting pipe when the grouting amount and grouting pressure reach the set value;

[0028] S8, pulling out the grouting pipe and the exhaust pipe after the slurry is finally cured, removing the wooden plug at the anchor hole opening, and pulling out the fixed support;

[0029] S9, after the slurry reaches a certain strength, the bridging is completed, at this time, continuing to drill the hole using the drill rod, and the drill rod can smoothly penetrate the rock fault under the closed space;

[0030] S10, considering the effect of gravity, the grouting slurry will accumulate in the lower space of the expansion bag, and there is less slurry in the upper part, and when drilling again, the upper part of the filling body is prone to air leakage, at this time, if the drilling is unsuccessful, the above steps are repeated.

[0031] The portable anchor drilling construction rock fault bridging device and the bridging method have the following beneficial effects: the folding expansion bag of the present application gradually expands under the action of grouting pressure, so that the anchor drilling hole forms a relatively closed space in the rock fault, which can make the drill rod quickly penetrate the rock fault, effectively solving the problems of air leakage and sticking of the drill rod in the anchor drilling construction of the rock fault; meanwhile, the closed space also solves the problem of slurry leakage during backfill grouting of the anchor hole, improves the drilling efficiency and construction quality, and reduces the construction cost. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 The use scene diagram of the portable anchor drilling construction rock fault bridging device provided by the present application.

[0033] Figure 2 The schematic diagram of the bridging device.

[0034] Figure 3 is a schematic view of the fixing support.

[0035] Figure 4 is Figure 3 is a sectional view along A-A.

[0036] Figure 5 is Figure 3 is a sectional view along B-B.

[0037] In the figure: 1-bridge net cage; 2-rubber plug; 3-sponge; 4-inflatable bag; 5-long tube; 6-short tube; 7-fixing support; 8-water stop valve; 71-connecting rod; 72-wooden plug; 73-handle; 74-connecting rod support; 75-grouting pipe and exhaust pipe clamping groove. DETAILED DESCRIPTION

[0038] The application will be further described in detail with reference to the accompanying drawings and specific examples.

[0039] As Figures 1-2 shown, a portable anchor cable drilling construction rock fault bridge device, comprising a bridge net cage 1, the bridge net cage 1 is provided with a rubber plug 2 at one end, the bridge net cage 1 is provided with a sponge 3 at the other end, the outer side of the bridge net cage 1 and the outer edge of the rubber plug 2 are wrapped with inflatable bags 4, the inflatable bags 4 are arranged in a folded manner on the side close to the sponge 3, with the injection of slurry, the folded inflatable bags 4 gradually unfold under the action of grouting pressure, forming a filling body between the rock faults, the rubber plug 2 is provided with two perforations, a long tube 5 and a short tube 6 are respectively arranged in the perforations, the long tube 5 and the short tube 6 are fixed by a fixing support 7, the long tube 5 and the short tube 6 are respectively provided with a water stop valve 8, the long tube 5 and the short tube 6 are exhaust pipes or grouting pipes.

[0040] The net cage 1 is made of wire mesh and is welded in a roll, which is divided into a top part, a middle part and a bottom part, the middle part is a large diameter section and a small diameter section, in order to ensure its own supporting effect, the length of the large diameter section is greater than that of the small diameter section.

[0041] The wire mesh makes the bridge net cage 1 have a grouting effect.

[0042] The rubber plug 2 is bonded to the end of the bridge net cage 1, the rubber plug 2 is in the shape of a circular truncated cone, the perforations are located at the three-eighth points of the diameter of the rubber plug 2, the hole diameter is less than 20 mm, so that the 20 mm long tube 5 and the short tube 6 are tightly fitted with the rubber plug 2, so that the bridge net cage 1 forms a closed space, the bottom of the bridge net cage 1 is provided with two perforations with a diameter of 20 mm at the same position as the rubber plug 2.

[0043] The sponge 3 is bonded to the end of the bridge net cage 1, which has better adhesion with the rock pre-fracture surface, so as to cope with the situation that the hole is not perpendicular to the fracture surface, and further reduce the gap between the inflatable bag 4 and the rock post-fracture surface.

[0044] The expansion bag 4 is made of wear-resistant, high-strength, and retractable polyethylene material.

[0045] The long tube 5 and the short tube 6 pass through the bridging cage 1 and the rubber plug 2. One end of the long tube 5 and the short tube 6 extends to the opening of the anchor hole. The other end of the long tube 5 is located on the side of the bridging cage 1 close to the sponge 3. The other end of the short tube 6 is located on the side of the bridging cage 1 close to the rubber plug 2.

[0046] When the anchor hole is tilted downward, the short pipe 6 is an exhaust pipe and the long pipe 5 is a grouting pipe;

[0047] When the anchor hole is tilted upward, the long pipe 5 is the exhaust pipe and the short pipe 6 is the grouting pipe;

[0048] When the anchor hole is horizontal, the fixed bracket controls the long tube 5 and the short tube 6 to be kept vertical. At this time, the upper tube is the exhaust pipe and the lower tube is the grouting pipe. There is no position requirement for the long tube 5 and the short tube 6.

[0049] like Figures 3-5 As shown, the fixed bracket 7 includes a connecting rod 71, a wooden plug 72, a handle 73, a connecting rod bracket 74, and a grouting pipe and exhaust pipe slot 75. The wooden plug 72 is provided with four through-holes, which are used to penetrate the long tube 5, the short tube 6 and the connecting rod 71 respectively. The wooden plug 72 fixes the fixed bracket 7 in the anchor hole, thereby ensuring the stability of the bridging device during the grouting process without slipping. The connecting rod bracket 74 is arranged between the two connecting rods 71. The grouting pipe and exhaust pipe slot 75 is provided with two through-holes and two slots. The connecting rod 71 is penetrated in the through-hole, and the long tube 5 and the short tube 6 are penetrated in the slot. The grouting pipe and exhaust pipe slot 75 can effectively prevent the bridging device from rotating in the anchor hole and more accurately ensure the position of the long tube 5 and the short tube 6.

[0050] The wooden plug 72 is arranged between the fixing bracket 7 and the hole of the anchor cable.

[0051] The water stop valve 8 is installed at the opening of the anchor hole of the long tube 5 and the short tube 6. The water stop valve 8 has the functions of passing slurry and stopping slurry in the open and closed states respectively.

[0052] Specifically, a portable anchor cable drilling construction rock fault bridging method includes the following steps:

[0053] S1. Determine the total length of the bridging cage and the length of the small diameter section of the bridging cage according to the width of the rock fault, and determine the large and small diameters of the bridging cage according to the diameter of the anchor hole, ensuring that the bridging cage can move freely in the anchor hole and can be folded to store enough expansion bags for filling;

[0054] S2. Material preparation: bridging cage, expansion bag, sponge, rubber plug, grouting pipe, exhaust pipe, water stop valve, fixing bracket;

[0055] S3. Welding is performed to make a bridging mesh cage, and sponge, rubber plug and expansion bag are sequentially adhered around it. The expansion bag is sealed so that only two holes on the rubber plug are retained in the bridging device.

[0056] S4. Install grouting pipes and exhaust pipes.

[0057] S5. Use the grouting pipe and exhaust pipe clamping slots to fix the grouting pipe and exhaust pipe, and send the bridging device into the anchor hole until it reaches the rear fracture surface of the rock. At this time, install a wooden plug at the anchor hole to fix the grouting bridge device fixing bracket in the anchor hole;

[0058] S6. Select the grouting pipe and exhaust pipe according to the inclination of the anchor hole. Open the exhaust pipe water stop valve and the grouting pipe water stop valve before grouting. When the slurry flows out of the exhaust pipe, close the exhaust pipe water stop valve.

[0059] S7. When the grouting volume and grouting pressure reach a fixed value, stop grouting and close the water stop valve of the grouting pipe;

[0060] S8. After the slurry has completely set, pull out the grouting pipe and exhaust pipe, remove the wooden plug at the anchor hole, and pull out the fixing bracket;

[0061] S9. When the slurry reaches a certain strength and the bridge is completed, the drill rod is used to continue drilling. In the closed space, the drill rod can smoothly penetrate the rock fault;

[0062] S10. Considering the effect of gravity, the grouting slurry will accumulate in the lower space of the expansion bag, and there will be less slurry in the upper part. When drilling again, air leakage is likely to occur in the upper part of the filling body. At this time, if the drilling is unsuccessful, repeat the above steps.

[0063] The above-mentioned specific implementation methods are used to illustrate the present invention and are only preferred embodiments of the present invention, rather than limiting the present invention. Any modifications, equivalent substitutions, improvements, etc. made to the present invention within the spirit of the present invention and the scope of protection of the claims shall fall within the scope of protection of the present invention.

Claims

1. A portable anchor cable drilling construction rock fault bridging device, characterized by: The invention comprises a bridging mesh cage (1), wherein one end of the bridging mesh cage (1) is provided with a rubber plug (2), and the other end of the bridging mesh cage (1) is provided with a sponge (3); the outer sides of the bridging mesh cage (1), the sponge (3), and the outer edges of the rubber plug (2) are all wrapped with an expansion bag (4); the expansion bag (4) is arranged in a folded shape at a side close to the sponge (3); the rubber plug (2) is provided with two through-holes, and a long tube (5) and a short tube (6) are respectively passed through the through-holes; the long tube (5) and the short tube (6) are fixed by a fixing bracket (7); the long tube (5) and the short tube (6) are both provided with a water stop valve (8); and the long tube (5) and the short tube (6) are exhaust pipes or grouting pipes.

2. The portable anchor cable drilling construction rock fault bridging device according to claim 1 is characterized by: The bridging mesh cage (1) is formed by rolling and welding wire mesh and is divided into three parts: a top part, a middle part, and a bottom part. The middle part is divided into a large diameter section and a small diameter section. The length of the large diameter section is greater than that of the small diameter section.

3. The portable anchor cable drilling construction rock fault bridging device according to claim 1 is characterized by: The bridging mesh cage (1) has a pulp-permeating effect.

4. The portable anchor cable drilling construction rock fault bridging device according to claim 1 is characterized by: The rubber plug (2) is bonded to the end of the bridging mesh cage (1), and the rubber plug (2) is in the shape of a truncated cone.

5. The portable anchor cable drilling construction rock fault bridging device according to claim 1 is characterized by: The sponge (3) is bonded to the end of the bridging mesh cage (1).

6. The portable anchor cable drilling construction rock fault bridging device according to claim 1 is characterized by: The expansion bag (4) is made of wear-resistant, high-strength, and retractable polyethylene material.

7. The portable anchor cable drilling construction rock fault bridging device according to claim 1 is characterized by: When the anchor hole is tilted downward, the short pipe (6) is an exhaust pipe and the long pipe (5) is a grouting pipe; When the anchor hole is inclined upward, the long tube (5) is an exhaust pipe and the short tube (6) is a grouting pipe; When the anchor cable hole is horizontal, the fixed bracket controls the long tube (5) and the short tube (6) to be vertical. At this time, the upper tube is an exhaust pipe and the lower tube is a grouting pipe.

8. The portable anchor cable drilling construction rock fault bridging device according to claim 7 is characterized by: The fixing bracket (7) comprises a connecting rod (71), a wooden plug (72), a handle (73), a connecting rod bracket (74), and a grouting pipe and exhaust pipe slot (75). The wooden plug (72) is provided with four through-holes, which are used to penetrate the long tube (5), the short tube (6) and the connecting rod (71), respectively. The connecting rod bracket (74) is arranged between the two connecting rods (71). The grouting pipe and exhaust pipe slot (75) is provided with two through-holes and two slots. The connecting rod (71) is penetrated in the through-holes, and the long tube (5) and the short tube (6) are penetrated in the slots.

9. The portable anchor cable drilling construction rock fault bridging device according to claim 1 is characterized by: The wooden plug (72) is arranged between the fixing bracket (7) and the anchor cable hole.

10. A portable anchor cable drilling method for rock fault bridging, characterized by: The method is based on the apparatus according to any one of claims 1 to 9 and comprises the following steps: S1. Determine the total length of the bridging cage and the length of the small diameter section of the bridging cage according to the width of the rock fault, and determine the large and small diameters of the bridging cage according to the diameter of the anchor hole, ensuring that the bridging cage can move freely in the anchor hole and can be folded to store enough expansion bags for filling; S2. Material preparation: bridging cage, expansion bag, sponge, rubber plug, grouting pipe, exhaust pipe, water stop valve, fixing bracket; S3. Welding a bridging mesh cage and sequentially gluing a sponge, a rubber plug, and an expansion bag around it. The expansion bag is sealed so that only two holes on the rubber plug remain in the bridging device. S4. Install grouting pipe and exhaust pipe; S5. Use the grouting pipe and exhaust pipe clamping slots to fix the grouting pipe and exhaust pipe, and send the bridging device into the anchor hole until it reaches the rear fracture surface of the rock. At this time, install a wooden plug at the anchor hole to fix the grouting bridge device fixing bracket in the anchor hole; S6. Select the grouting pipe and exhaust pipe according to the inclination of the anchor hole. Open the exhaust pipe water stop valve and the grouting pipe water stop valve before grouting. When the slurry flows out of the exhaust pipe, close the exhaust pipe water stop valve. S7. When the grouting volume and grouting pressure reach a fixed value, stop grouting and close the water stop valve of the grouting pipe; S8. After the slurry has completely set, pull out the grouting pipe and exhaust pipe, remove the wooden plug at the anchor hole, and pull out the fixing bracket; S9. When the slurry reaches a certain strength and the bridge is completed, the drill rod is used to continue drilling. In the closed space, the drill rod can smoothly penetrate the rock fault; S10. Considering the effect of gravity, the grouting slurry will accumulate in the lower space of the expansion bag, and there will be less slurry in the upper part. When drilling again, air leakage is likely to occur in the upper part of the filling body. At this time, if the drilling is unsuccessful, repeat the above steps.

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