Tunnel pipe shed construction method and device

Abstract

The invention discloses a tunnel pipe shed construction method and device, the device comprises: a material bearing mechanism, the material bearing mechanism is used to bear a plurality of sections of steel pipe sheds; a clamping and moving mechanism, the clamping and moving mechanism is located at a side of the material bearing mechanism adjacent to a tunnel opening, the clamping and moving mechanism comprises: a base, a roller arranged below the base, a support fixed above the base, a support arm rotatably connected to the top of the support, and a supporting unit suspended at the other end of the support arm, the supporting unit is used to support a seamless steel pipe from the material bearing mechanism and move it into a pipe shed hole at the tunnel opening; and a pipe shed pushing mechanism, the pipe shed pushing mechanism is located at a side of the clamping and moving mechanism adjacent to the tunnel opening, the pipe shed pushing mechanism is used to push each section of the steel pipe shed into a corresponding hole position.

Description

Technical Field

[0001] The present invention relates to the technical field of tunnel engineering, and in particular to a tunnel pipe shed construction method and device. Background Art

[0002] In shallow buried tunnel construction, pre-support measures are often used for surrounding rocks with poor self-stabilization ability to achieve the purpose of strengthening the surrounding rocks and stabilizing the working surface. Advanced pipe shed pre-support is a commonly used pre-support measure. Pipe shed generally refers to a shed protection structure formed by circumferentially arranging at a certain interval along part or all of the underground engineering section. Its purpose is to provide a temporary support method to enhance the bearing capacity of the stratum in advance for safe excavation under special geological conditions. It is mainly used in soft, gravel strata and soft rocks, rock piles, and broken zones.

[0003] At present, in the process of pipe shed construction, because the construction height of the pipe shed is relatively high, an excavator is generally used to apply pressure on the end of the pipe segment. However, due to the long use time of the excavator, the utilization rate is low. In addition, because the length of the pipe shed inserted into the drill hole is relatively long and there is an upward elevation angle, when the excavator applies force at the end, not only is it difficult to make the pressure action line coincide with the axis of the hole, but it is also difficult to control the degree of deflection of the pipe shed, which can easily cause the pipe segment to bend and deform.

[0004] For example, Chinese patent application No. 201710198733.4 discloses a pipe shed construction device and method, wherein the device includes: a work platform, an air compressor and a pipe tamping hammer; the work platform is fixedly set on the ground in front of the construction area; the bottom of the air compressor is provided with a sliding member that slides with the end face of the work platform; the air inlet end of the pipe tamping hammer is connected to the air compressor by a hose, and the working end of the pipe tamping hammer is provided with a steel pipe fixing member for coaxially fixing the steel pipe. However, the invention still has the following shortcomings or deficiencies: (1) The opening sequence of the pipe shed holes and the construction sequence of the pipe shed pipes are not disclosed; (2) The pipe shed construction device cannot measure the deflection of the pipe shed construction synchronously with the jacking of the steel pipe; (3) The rotational freedom of the pipe tamping hammer is low. During the construction process, the air compressor and the pipe tamping hammer need to be replaced and set on different work platforms, which increases the construction difficulty and prolongs the construction period.

[0005] Therefore, it has become an urgent problem to be solved in the industry to provide a tunnel pipe-roof construction device and method with a simple process structure, fast construction speed, and ability to ensure the quality of pipe-roof construction. Summary of the invention

[0006] The purpose of the present invention is to provide a tunnel pipe-roof construction method and device, which effectively improves the pipe-roof construction speed by setting a pre-set sequence for hole opening and pipe-roof construction, and utilizes different mechanical components to achieve continuous operation of the pipe-roof construction, which not only ensures the safety of construction, but also improves the construction quality and speed of the pipe-roof.

[0007] The first object of the present invention is to provide a tunnel pipe-roof construction method, which comprises the following steps: (1) determining a pipe-roof opening contour line on a tunnel working surface to be constructed, marking at least twenty-seven hole positions on the pipe-roof opening contour line, wherein the at least twenty-seven hole positions are divided into at least nine A hole positions, at least nine B hole positions and at least nine C hole positions, wherein the A hole positions are distributed in the middle and upper part of the pipe-roof opening contour line to form an A hole position area, the B hole positions are distributed in the lower left part of the pipe-roof opening contour line to form a B hole position area, and the C hole positions are distributed in the lower right part of the pipe-roof opening contour line to form a C hole position area; (2) determining a drilling angle and marking the opening contour line of the pipe-roof opening according to the first embodiment of the present invention; and The method comprises the following steps: (1) drilling holes in a first sequence, installing orifice pipes and water-stopping devices at the openings, wherein the first sequence is the first A hole located in the middle of the A hole area, the first B hole located in the middle of the B hole area, and the first C hole located in the middle of the C hole area; (2) drilling holes to a predetermined depth at the orifice pipe, advancing the steel pipe roof to a position 1 to 2 meters from the outer contour line of the tunnel, embedding the fiberglass anchor rods into the steel pipe roof, sealing the orifice, and performing grouting; (3) drilling holes in a second sequence, installing orifice pipes and water-stopping devices at the openings, wherein the second sequence is the second A hole located at the leftmost side of the A hole area, the second B hole located at the leftmost side of the B hole area, and the first C hole located at the middle of the C hole area. hole position, the second C hole position at the leftmost side of the C hole position area, and repeat step (3); (5), drill holes in a third sequence, install orifice pipes and water-stopping devices at the holes, wherein the third sequence is the third A hole position at the rightmost side of the A hole position area, the third B hole position at the rightmost side of the B hole position area, the third C hole position at the leftmost side of the C hole position area, and repeat step (3); (6), drill holes in a fourth sequence, install orifice pipes and water-stopping devices at the holes, wherein the fourth sequence is any A hole position between the first A hole position and the second A hole position in the A hole position area, any A hole position between the first B hole position and the second B hole position in the B hole position area Any B hole position in the A hole position area, any C hole position between the first C hole position and the second C hole position in the C hole position area, and repeat step (3); (7), drill holes in the fifth round sequence, install the orifice pipe and the water stopping device at the hole opening, wherein the fifth round sequence is any A hole position between the first A hole position and the third A hole position in the A hole position area, any B hole position between the first B hole position and the third B hole position in the B hole position area, and any C hole position between the first C hole position and the third C hole position in the C hole position area, and repeat step (3); and (8), repeat steps (6) and (7) until grouting is completed in at least twenty-seven hole positions.

[0008] Optionally, the first section of the steel pipe shed in the tunnel pipe shed construction method uses two seamless steel pipes of different lengths, and subsequent sections of the steel pipe shed all use seamless steel pipes of the same length.

[0009] Optionally, the steel pipe shed of the previous section and the steel pipe shed of the next section are connected by insert welding.

[0010] Optionally, the drilling angle of each of the at least twenty-seven hole positions is 3 to 5 degrees along the normal angle.

[0011] The second object of the present invention is to provide a tunnel pipe roof construction device using the above-mentioned tunnel pipe roof method, which includes: a material carrying mechanism, which is used to carry several sections of seamless steel pipes; a clamping and moving mechanism, which is located on the side of the material carrying mechanism adjacent to the tunnel entrance, and the clamping and moving mechanism includes: a base, a roller arranged below the base, a support fixed above the base, a support arm rotatably connected to the top of the support, and a supporting unit suspended at the other end of the support arm, the supporting unit is used to support the seamless steel pipe from the material carrying mechanism to the pipe roof hole at the tunnel entrance; and a pipe roof pushing mechanism, which is located on the side of the clamping and moving mechanism adjacent to the tunnel entrance, and the pipe roof pushing mechanism is used to push each section of seamless steel pipe into the corresponding hole position.

[0012] Optionally, it further includes a slope detection mechanism, which is placed in the steel pipe shed to obtain real-time data on the deflection during the pipe shed construction.

[0013] Optionally, the material bearing mechanism is provided with two bearing parts to respectively bear the first section of the steel pipe shed made of seamless steel pipes of two different lengths.

[0014] Optionally, the holding unit of the clamping mobile mechanism includes two slings connected to the support arm through a spherical hinge and a lifting claw connected to the bottom of each sling, and a retractable adjustment component is provided in the middle of each sling to adjust the length of the sling.

[0015] Optionally, the pipe rack propulsion mechanism includes: a movable base, an adjustable support fixedly connected to the movable base, a power component arranged on the adjustable support, and a propulsion component connected to the power component.

[0016] Optionally, the propulsion component includes: a wedge-shaped inclined surface propulsion end, a transmission body fixedly connected to the wedge-shaped inclined surface propulsion end, and a sleeve sleeved on the transmission body, and both ends of the sleeve are respectively connected to the transmission body and the power component of the pipe rack propulsion mechanism by bolts.

[0017] The diffusion radius of the slurry during the grouting process is 1.5 to 2.0 meters, the gel time of the slurry is 15 to 30 minutes, and the grouting speed is 20 to 30 liters per minute.

[0018] Preferably, the grouting liquid comprises cement slurry and water glass slurry in a weight ratio of 1:1 to 0.8, wherein the concentration of the water glass slurry is set to 35 degrees Baume; and the casing material comprises water, cement and clay in a weight ratio of 1.5 to 1.6:1:1.

[0019] The beneficial effects of the present invention are: (1) setting the sequence in advance for drilling holes and pipe shed construction not only ensures the safety of construction, but also effectively improves the speed of pipe shed construction; (2) utilizing different mechanism components to achieve continuous operation of pipe shed construction, while improving the construction quality of the pipe shed; (3) the deflection of the pipe shed construction can be measured synchronously with the advancement of the steel pipe shed, further ensuring the installation quality of the pipe shed and improving the construction speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A flow chart of the tunnel pipe roof construction method of the present invention is shown.

[0021] Figure 2 A schematic structural diagram of the opening of the tunnel pipe roof of the present invention is shown.

[0022] Figure 3 The schematic diagram of the structure of the tunnel pipe-roof construction device of the present invention is shown.

[0023] Figure 4 A schematic structural diagram of the propulsion component of the present invention is shown. DETAILED DESCRIPTION

[0024] Next, the tunnel pipe-roof construction method and device of the present invention will be described in detail with reference to the accompanying drawings.

[0025] First, in order to speed up the construction progress, it is necessary to explore the geological conditions in advance and determine the burial depth and other issues. Figure 1 As shown, in step S1, the pipe roof opening contour line is determined on the working surface of the tunnel to be constructed, and twenty-seven hole positions are marked on the pipe roof opening contour line. The twenty-seven hole positions are divided into nine A hole positions, nine B hole positions and nine C hole positions. The A hole positions are distributed in the middle and upper part of the pipe roof opening contour line to form an A hole position area, the B hole positions are distributed in the lower left part of the pipe roof opening contour line to form a B hole position area, and the C hole positions are distributed in the lower right part of the pipe roof opening contour line to form a C hole position area (as shown in FIG. Figure 2 shown).

[0026] In step S2, if Figure 2 As shown, the drilling angle is determined and holes are opened in a first sequence, and orifice pipes and water-stopping devices are installed at the openings, wherein the first sequence is the first A hole position A1 located in the middle of the A hole position area, the first B hole position B1 located in the middle of the B hole position area, and the first C hole position C1 located in the middle of the C hole position area.

[0027] Then, in step S3, a hole is drilled to a predetermined depth at the borehole pipe, the steel pipe shed is advanced to a position 1 to 2 meters from the outer contour line of the tunnel, the fiberglass anchor rod is embedded in the steel pipe shed, the borehole is closed, and grouting is performed.

[0028] Next, in step S4, holes are opened in a second sequence, and orifice pipes and water-stopping devices are installed at the holes. The second sequence is the second A hole position A2 located at the leftmost side of the A hole position area, the second B hole position B2 located at the leftmost side of the B hole position area, and the second C hole position C2 located at the leftmost side of the C hole position area, and step S3 is repeated.

[0029] In step S5, holes are opened in the third sequence, and orifice pipes and water-stopping devices are installed at the holes. The third sequence is the third A hole position A3 located at the rightmost side of the A hole position area, the third B hole position B3 located at the rightmost side of the B hole position area, and the third C hole position C3 located at the leftmost side of the C hole position area, and step S3 is repeated.

[0030] In step S6, holes are opened in the fourth sequence, and orifice pipes and water-stopping devices are installed at the holes. The fourth sequence is any A hole position A4 between the first A hole position A1 and the second A hole position A2 in the A hole position area, any B hole position B4 between the first B hole position B1 and the second B hole position B2 in the B hole position area, and any C hole position C4 between the first C hole position C1 and the second C hole position C2 in the C hole position area, and step S3 is repeated.

[0031] In step S7, holes are opened in the fifth sequence, and orifice pipes and water-stopping devices are installed at the openings, wherein the fifth sequence is any A hole position A5 between the first A hole position A1 and the third A hole position A3 in the A hole position area, any B hole position B5 between the first B hole position B1 and the third B hole position B3 in the B hole position area, and any C hole position C5 between the first C hole position C1 and the third C hole position C3 in the C hole position area, and step S3 is still repeated.

[0032] Then, steps S6 and S7 are repeated until grouting of twenty-seven holes is completed.

[0033] Therefore, after setting the position of the pipe shed hole in advance, a series of operations such as drilling holes and pipe shed construction can be carried out in sequence according to the predetermined sequence, which can effectively ensure the safety of construction. At the same time, it can also be carried out in sequence, and multiple operations can be carried out at the same time, which improves the construction efficiency.

[0034] As an alternative implementation method, the first section of the steel pipe shed in the tunnel pipe shed construction method uses two seamless steel pipes of different lengths, and the subsequent sections of the steel pipe shed all use seamless steel pipes of the same length. The steel pipe shed of the previous section and the steel pipe shed of the next section are connected by plug-in welding, ensuring that the ratio of joints to non-joints of the steel pipe shed in the same section of the tunnel does not exceed 50%, and the pipe sheds are firmly connected. This effectively avoids the situation where a certain section of the tunnel may be full of steel pipe shed joints, fully guarantees the stability of the structure, and ensures construction safety.

[0035] like Figure 3As shown, the tunnel pipe-roof construction device of the present invention comprises: a material carrying mechanism 10 , a clamping and moving mechanism 20 , and a pipe-roof propulsion mechanism 30 .

[0036] The material bearing mechanism 10 is provided with two bearing parts, so as to respectively bear two seamless steel pipes of different lengths, thereby meeting the need of the first section of the steel pipe shed made of two seamless steel pipes of different lengths.

[0037] like Figure 3 As shown, the clamping and moving mechanism 20 includes: a base 201, a roller 202 arranged below the base 201, a support 203 fixed above the base 201, a support arm 204 rotatably connected to the top of the support 203, and a holding unit 205 suspended at the other end of the support arm 204, wherein the holding unit 205 includes two slings 207 connected to the support arm 204 through a spherical hinge 206 and a lifting claw 208 respectively connected to the bottom of each sling 207, and a retractable adjustment component 209 is provided in the middle of each sling 208. The retractable adjustment component 209 is used to adjust the length of the sling 208, so that it is convenient for it to hold the seamless steel pipe from the material carrying mechanism 10 through the lifting claw 208, and move it to the pipe support hole at the tunnel entrance by rotating the support arm 204 in the rotation direction of the spherical hinge 206.

[0038] The pipe rack propulsion mechanism 30 includes: a movable base 301, an adjustable support 302 fixedly connected to the movable base 301, a power component 303 disposed on the adjustable support, and a propulsion component 304 connected to the power component 303. Specifically, Figure 4 As shown, the propulsion component 304 includes: a wedge-shaped inclined surface propulsion end 3041, a transmission body 3042 fixedly connected to the wedge-shaped inclined surface propulsion end 3041, and a sleeve 3043 sleeved on the transmission body, and the two ends of the sleeve 3043 are respectively firmly connected to the transmission body 3042 and the power component 303 of the pipe rack propulsion mechanism 30 by bolts, thereby, the front end of the wedge-shaped inclined surface propulsion end 3041 is against the end of the steel pipe rack, and the power component 303 is transmitted through the power of the transmission body 3042, so that the steel pipe rack gradually enters the corresponding hole position under the action of the pipe rack propulsion mechanism 30 until it reaches the predetermined position.

[0039] In this non-limiting embodiment, it further includes a slope detection mechanism, which is placed in the steel pipe shed and moves along the axis of the steel pipe shed. In conjunction with the use of the pipe shed propulsion mechanism, the slope detection mechanism obtains the data of the deflection during the pipe shed construction in real time, thereby ensuring high-precision orientation of the pipe shed construction and timely error correction, thereby achieving high quality and high speed of the pipe shed construction.

[0040] Although the preferred embodiments of the present invention have been described in detail herein, it is to be understood that the present invention is not limited to the specific structures and steps described and shown in detail herein, and other variations and modifications may be implemented by those skilled in the art without departing from the spirit and scope of the present invention.

Claims

1. A tunnel pipe roof construction method, characterized in that: The following steps are involved: (1) Determine a pipe roof opening contour line on the working surface of the tunnel to be constructed, and mark at least 27 hole positions on the pipe roof opening contour line, wherein the at least 27 hole positions are divided into at least nine A hole positions, at least nine B hole positions, and at least nine C hole positions, wherein the A hole positions are distributed in the middle and upper part of the pipe roof opening contour line to form an A hole position area, the B hole positions are distributed in the lower left part of the pipe roof opening contour line to form a B hole position area, and the C hole positions are distributed in the lower right part of the pipe roof opening contour line to form a C hole position area; (2) Determine the drilling angle and drill holes in a first sequence, and install orifice pipes and water stop devices at the holes, wherein the first sequence is a first A hole located in the middle of the A hole area, a first B hole located in the middle of the B hole area, and a first C hole located in the middle of the C hole area; (3) Drill a hole to a predetermined depth at the borehole pipe, push the steel pipe shed to a position 1 to 2 meters from the outer contour of the tunnel, embed the fiberglass anchor rod into the steel pipe shed, seal the borehole, and perform grouting; (4) drilling holes in a second sequence, installing orifice pipes and water-stopping devices at the holes, wherein the second sequence is the second A hole located at the leftmost side of the A hole area, the second B hole located at the leftmost side of the B hole area, and the second C hole located at the leftmost side of the C hole area, and repeating step (3); (5) Drill holes in a third sequence, and install orifice pipes and water-stopping devices at the holes, wherein the third sequence is the third A hole located at the rightmost side of the A hole area, the third B hole located at the rightmost side of the B hole area, and the third C hole located at the leftmost side of the C hole area, and repeat step (3); (6) Drill holes in a fourth sequence, and install orifice pipes and water-stopping devices at the holes, wherein the fourth sequence is any A hole position between the first A hole position and the second A hole position in the A hole position area, any B hole position between the first B hole position and the second B hole position in the B hole position area, and any C hole position between the first C hole position and the second C hole position in the C hole position area, and repeat step (3); (7) Drill holes in a fifth sequence, and install orifice pipes and water-stopping devices at the holes, wherein the fifth sequence is any A hole position between the first A hole position and the third A hole position in the A hole position area, any B hole position between the first B hole position and the third B hole position in the B hole position area, and any C hole position between the first C hole position and the third C hole position in the C hole position area, and repeat step (3); and (8) Repeat steps (6) and (7) until grouting is completed in at least twenty-seven holes.

2. A tunnel pipe roof construction method as claimed in claim 1, characterized in that: In the tunnel pipe shed construction method, the first section of the steel pipe shed uses two seamless steel pipes of different lengths, and the subsequent sections of the steel pipe shed all use seamless steel pipes of the same length.

3. A tunnel pipe roof construction method as claimed in claim 1, characterized in that: The steel pipe shed of the previous section and the steel pipe shed of the next section are connected by plug-in welding.

4. A tunnel pipe roof construction method as claimed in claim 1, characterized in that: The drilling angle of each of the at least twenty-seven hole positions is 3 to 5 degrees along the normal angle.

5. A tunnel pipe-roof construction device using the tunnel pipe-roof method according to any one of claims 1 to 4, characterized in that: include: A material carrying mechanism, the material carrying mechanism is used to carry a plurality of sections of seamless steel pipes; A clamping and moving mechanism, the clamping and moving mechanism is located on a side of the material carrying mechanism adjacent to the tunnel opening, the clamping and moving mechanism comprises: a base, a roller arranged below the base, a support fixed above the base, a support arm rotatably connected to the top of the support, and a holding unit suspended at the other end of the support arm, the holding unit being used to hold the seamless steel pipe from the material carrying mechanism and move it to the pipe support hole at the tunnel opening; and The pipe rack pushing mechanism is located on the side of the clamping and moving mechanism adjacent to the tunnel opening, and is used to push each section of seamless steel pipe into the corresponding hole position.

6. The tunnel pipe-roof construction device according to claim 5, characterized in that: It further comprises a slope detection mechanism, which is placed in the steel pipe shed to obtain the data of the deflection in the pipe shed construction in real time.

7. The tunnel pipe-roof construction device according to claim 5, characterized in that: The material carrying mechanism is provided with two carrying parts for respectively carrying two seamless steel pipes of different lengths.

8. The tunnel pipe-roof construction device according to claim 5, characterized in that: The holding unit of the clamping moving mechanism comprises two slings connected to the support arm through a spherical hinge and a hanging claw connected to the bottom of each sling respectively. A retractable adjustment component is provided in the middle of each sling to adjust the length of the sling.

9. The tunnel pipe-roof construction device according to claim 5, characterized in that: The pipe rack propulsion mechanism comprises: a movable base, an adjustable support column fixedly connected to the movable base, a power component arranged on the adjustable support column, and a propulsion component connected to the power component.

10. The tunnel pipe-roof construction device according to claim 9, characterized in that: The propulsion component includes: a wedge-shaped inclined surface propulsion end, a transmission body fixedly connected to the wedge-shaped inclined surface propulsion end, and a sleeve sleeved on the transmission body. The two ends of the sleeve are respectively connected to the transmission body and the power component of the pipe rack propulsion mechanism by bolts.

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