CN220015180U - Hard rock floor pipe curtain and pipe following construction device - Google Patents
Hard rock floor pipe curtain and pipe following construction device Download PDFInfo
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- CN220015180U CN220015180U CN202321033038.XU CN202321033038U CN220015180U CN 220015180 U CN220015180 U CN 220015180U CN 202321033038 U CN202321033038 U CN 202321033038U CN 220015180 U CN220015180 U CN 220015180U
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- pipe
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- bit
- annular step
- air outlet
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- 238000010276 construction Methods 0.000 title claims abstract description 38
- 239000011435 rock Substances 0.000 title claims abstract description 32
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 32
- 239000010959 steel Substances 0.000 claims abstract description 32
- 239000002893 slag Substances 0.000 claims description 17
- 238000005553 drilling Methods 0.000 description 15
- 238000000034 method Methods 0.000 description 12
- 238000007599 discharging Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000002689 soil Substances 0.000 description 4
- 239000000843 powder Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000012954 risk control Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000008093 supporting effect Effects 0.000 description 1
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- Earth Drilling (AREA)
Abstract
The utility model discloses a hard rock floor pipe curtain following construction device which comprises a spiral drill rod, a down-the-hole impactor and a reaming bit, wherein the spiral drill rod and the down-the-hole impactor are arranged in a steel pipe after being connected end to end; the front end face of the reaming bit is radially and slidably connected with a plurality of sliding blocks, a first annular step is arranged on the outer circle of the front end of the reaming bit, and the first annular step is positioned behind the sliding blocks; the front end fixedly connected with pipe shoe of steel pipe is provided with the second annular step on the interior circle of pipe shoe, and the front end setting of reamer bit is in the pipe shoe and makes the slider stretch out outside the pipe shoe, and the rear end of reamer bit is connected with down-the-hole hammer's front end, and first annular step and the looks butt of second annular step to when making reamer bit and moving forward, drive the steel pipe and move forward. The device realizes the construction of the pipe curtain in the hard rock stratum along with the pipe, is simple to operate and improves the construction efficiency.
Description
Technical Field
The utility model belongs to the technical field of pipe curtain construction, and particularly relates to a hard rock stratum pipe curtain and pipe following construction device.
Background
The pipe curtain method is a construction method for constructing large-section underground space by jacking steel pipes with larger diameters into soil layers in rows according to the designed elevation, azimuth and gradient, and connecting the steel pipes in the underground in advance in a close-packed manner by lock catches to form a curtain so as to achieve the advanced pre-support effect. The pre-supporting effect of the pipe curtain method is stronger than that of reinforcing methods such as pipe sheds, grouting, horizontal rotary spraying and the like, the effect on shallow soil covering, environmental influence and projects with high sedimentation control requirements is obvious, and the pipe curtain method is widely used for high-risk control projects such as crossing railways, highways, airports, industrial and civil buildings and the like at home and abroad.
The current pipe curtain construction method mainly comprises the following steps: the fixed (guiding) drilling method, the horizontal spiral drilling method, the ramming pipe construction method, the jacking pipe method, the mini-tunnel construction method and the like, but the methods are mainly concentrated in underground engineering construction in soft soil stratum, hard soil stratum, weak stratum and silt stratum in the past, and for the construction of hard rock stratum, a 'hole guiding jacking method' of firstly drilling and then inserting is usually adopted, namely, a common drill bit slightly larger than the diameter of a steel pipe is firstly adopted to drill to a designed depth, the drilling tool such as the drill bit is withdrawn after the hole is formed, and then the steel pipe is continuously jacked to the designed depth by adopting a drilling machine or other jacking equipment, but the method cannot provide a wall protection effect for the wall of the drilled hole in time, so that the steel pipe possibly cannot smoothly enter the hole in a subsided area due to poor rock quality, and the construction cannot be successfully completed.
Disclosure of Invention
In order to solve the problems in the prior art, the utility model provides a hard rock stratum pipe curtain and pipe construction device. The technical problems to be solved by the utility model are realized by the following technical scheme:
the hard rock floor pipe curtain and pipe following construction device comprises a spiral drill rod, a down-the-hole impactor and a reaming bit, wherein the spiral drill rod and the down-the-hole impactor are arranged in a steel pipe after being connected end to end; the front end face of the reaming bit is radially and slidably connected with a plurality of sliding blocks, a first annular step is arranged on the outer circle of the front end of the reaming bit, and the first annular step is positioned behind the sliding blocks; the front end fixedly connected with pipe shoe of steel pipe, be provided with the second annular step on the interior circle of pipe shoe, the front end setting of reamer bit is in the pipe shoe and make the slider stretches out outside the pipe shoe, the rear end of reamer bit is connected with down-the-hole hammer's front end, just first annular step and second annular step looks butt to make when reamer bit moves forward, drive the steel pipe moves forward.
Further, a plurality of sliding grooves which incline backwards are uniformly distributed on the front end surface of the reaming bit in the radial direction, and the sliding blocks are clamped in the sliding grooves and can slide freely along the sliding grooves.
Further, an air inlet hole is formed in the rear end of the reaming bit in the axial direction, a first air outlet hole is formed in the front end of the reaming bit in an outward inclined mode, and the first air outlet hole is communicated with the air inlet hole; and slag discharge grooves are axially formed in the outer circumferential surfaces of the reamer heads between the adjacent sliding blocks, and air outlets of the first air outlet holes are positioned on the front end surfaces of the reamer heads between the adjacent sliding blocks and correspond to the slag discharge grooves.
Further, a second air outlet hole is formed in the front end of the reaming bit, the second air outlet hole is communicated with the air inlet hole, and an air outlet of the second air outlet hole is located in the sliding groove.
Further, a ball is arranged between the sliding block and the sliding groove.
Further, the spiral drill rod is connected with the down-the-hole hammer through a reducing connector.
The utility model has the beneficial effects that:
1. the construction device drives the spiral drill rod to drive the reaming bit to cut hard rock through the drilling machine, the rock is broken through the down-the-hole impactor, rock slag is discharged out of the hole by utilizing the spiral drill rod and high-pressure air, pipe curtain construction under the geological condition of a hard rock stratum is achieved, meanwhile, pipe curtain following construction is achieved by utilizing the annular step in the pipe shoe at the end part of the steel pipe to be matched with the annular step on the reaming bit, operation is simple, and construction efficiency is improved.
2. The reaming bit adopted by the construction device is a sliding block reaming bit, a sliding block on the reaming bit is stressed to expand outwards during working, and is stressed to slide inwards and smoothly withdraw from the steel pipe after the working is finished, a receiving well is not required to be arranged at the other end of the pipe curtain, and the reaming bit can be reused, so that the cost is saved;
3. the construction device utilizes the high-pressure air and the spiral drill rod which are conveyed by the air compressor of the drilling machine to carry out combined deslagging, thereby solving the difficult problem that deslagging is difficult to be carried out by singly utilizing the high-pressure air in the construction of a large-diameter pipe curtain (the diameter is more than 200 mm);
4. the construction device adopts a reamer bit and a down-the-hole impactor to realize hole forming in a hard rock stratum through the combined actions of cutting and impact.
The present utility model will be described in further detail with reference to the accompanying drawings and examples.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
FIG. 2 is a schematic view of the construction of a boot;
FIG. 3 is a schematic view of the front view of a reamer bit;
fig. 4 is a schematic cross-sectional view of A-A in fig. 3.
Reference numerals illustrate:
1-a spiral drill rod; 2-down-the-hole impactor; 3-reaming bits; 4-a steel pipe; 5-reducing connectors; 6-pipe boots; 3-1-sliding grooves; 3-2-slide blocks; 3-3-balls; 3-4-rivets; 3-5-a first annular step; 3-6-air inlet holes; 3-7-a first air outlet hole; 3-8 of a slag discharge groove; 3-9, namely an air outlet of the first air outlet hole; 3-10-second air outlet holes; 3-11-an air outlet of the second air outlet hole; 6-1-second annular step.
Detailed Description
The present utility model will be described in further detail with reference to specific examples, but embodiments of the present utility model are not limited thereto.
In the description of the present utility model, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "front", "rear", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of description and simplification of the description, and do not indicate or imply that the apparatus or element in question must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
Referring to fig. 1 to 4, the embodiment of the utility model provides a hard rock stratum pipe curtain and pipe construction device, which specifically comprises a spiral drill rod 1, a down-the-hole impactor 2 and a reaming bit 3, wherein the spiral drill rod 1 and the down-the-hole impactor 2 are arranged in a steel pipe 4 for pipe curtain construction after being connected end to end, and the spiral drill rod 1 and the down-the-hole impactor 2 are connected through a reducing connector 5.
Specifically, four sliding grooves 3-1 inclined backwards are uniformly distributed on the front end surface of the reamer bit 3 in the radial direction, a sliding block 3-2 is clamped in the sliding groove 3-1, the sliding block 3-2 can slide freely along the sliding groove 3-1, when the sliding block 3-2 slides backwards along the sliding groove 3-1, the working surface of the reamer bit 3 gradually becomes larger, when the reamer bit 3 is in a working state, the sliding block 3-2 slides to the rearmost end of the sliding groove 3-1, the working surface of the reamer bit 3 is the largest, at this time, a gap is reserved between the rear end of the reamer bit 3 without the sliding block 3-2 and the front end of the reamer bit 3 with the sliding block 3-2, and the gap can accommodate a steel pipe 4; in addition, in order to guarantee that the sliding block 3-2 slides smoothly, a ball 3-3 is arranged between the sliding block 3-2 and the sliding groove 3-1, the ball 3-3 is prevented from falling off from the sliding block 3-2 through a rivet 3-4, when the drilling machine drives the reaming bit 3 to rotate and work, the sliding block 3-2 is forced to expand outwards along the sliding groove 3-1, when the reaming bit 3 stops working, the drilling machine drives the reaming bit 3 to withdraw outwards, the sliding block 3-2 is forced to slide inwards and withdraw smoothly from the steel pipe 4, a receiving well is not required to be arranged at the other end of the pipe curtain, and therefore the working efficiency is improved, and the economic cost is saved.
Meanwhile, a first annular step 3-5 is arranged on the outer circle of the front end of the reaming bit 3, and the first annular step 3-5 is positioned behind the sliding block 3-2; the front end part of the steel pipe 4 is welded with a pipe shoe 6, the inner circular surface of the pipe shoe 6 is provided with a second annular step 6-1, the front end of the reaming bit 3 is arranged in the pipe shoe 6 and enables the sliding block 3-2 to extend out of the pipe shoe 6, the rear end of the reaming bit 3 is connected with the front end of the down-the-hole impactor 2, and the first annular step 3-5 is abutted against the second annular step 6-1, so that when the reaming bit 3 moves forwards, the steel pipe 4 can be driven to move forwards simultaneously through the cooperation of the first annular step 3-5 and the second annular step 6-1, the wall protection effect is provided for the wall of a drilled hole in time, the construction safety is ensured, the situation that hard rock stratum mentioned in the background art is partially collapsed to cause hole collapse is avoided, and the situation that the steel pipe 4 cannot enter the hole smoothly is caused; because the contact part of the second annular step 6-1 and the first annular step 3-5 needs to bear great impact, the pipe shoe 6 is made of 27SiMn materials with high strength and high wear resistance.
In addition, the inside of the rear end of the reaming bit 3 is axially provided with air inlet holes 3-6, the front end of the reaming bit 3 is outwards provided with four first air outlet holes 3-7 in an inclined mode, and the first air outlet holes 3-7 are communicated with the air inlet holes 3-6; the outer peripheral surface of the reaming bit 3 between the adjacent sliding blocks 3-2 is axially provided with slag discharging grooves 3-8, the air outlet 3-9 of the first air outlet is positioned at the front end surface of the reaming bit 3 between the adjacent sliding blocks 3-2 and corresponds to the slag discharging grooves 3-8, under the action of an air compressor of a drilling machine, high-pressure air enters through the inner pore canal of the spiral drill rod 1, the reducing connector 5 and the down-the-hole impactor 2 and is discharged through the reaming bit 3, broken rock slag is blown to a gap between the spiral drill rod 1 and the steel pipe 4 from the slag discharging grooves 3-8 on the reaming bit 3 under the action of the high-pressure air, and the rock slag is discharged outside the steel pipe 4 through the rotation of the spiral drill rod 1, so that the problems that the rock slag is accumulated in the steel pipe when the diameter is too large, and the drilling cannot be smoothly drilled due to the fact that the high-pressure air is singly utilized in the pipe curtain construction process are solved.
Further, in order to prevent the slider 3-2 of the reamer bit 3 from blocking the gap between the slider 3-2 and the chute 3-1 by drill slag and rock powder during operation, so as to cause the clamping stagnation of the slider 3-2, a second air outlet hole 3-10 is formed in the front end of the reamer bit 3, the second air outlet hole 3-10 is communicated with the air inlet hole 3-6, an air outlet 3-11 of the second air outlet hole is located in the chute 3-1, high-pressure air enters the second air outlet hole 3-10, and residual drill slag and rock powder between the slider 3-2 and the chute 3-1 are timely blown out, so that the slider 3-2 can slide along the chute 3-1 normally.
The process of the pipe curtain and pipe construction by using the utility model is as follows:
setting a pipe curtain initial working cavity at a section of pipe curtain advance support to be set, setting a construction rack and a pipe curtain drilling machine in the initial working cavity, sequentially connecting a spiral drill rod 1, a reducing connector 5, a down-the-hole hammer 2 and a reaming drill bit 3 by the pipe curtain drilling machine, enabling the drilling tool to pass through the first section of steel pipe 4, opening a sliding block 3-2 under the action of thrust after the reaming drill bit 3 contacts a rock mass, enabling the reaming drill bit 3 to rotationally cut the rock mass, enabling the down-hole hammer 2 to impact the broken rock mass, enabling broken rock slag to be discharged into a gap between the spiral drill rod 1 and the steel pipe 4 from a slag discharge groove 3-8 of the reaming drill bit 3 under the action of high-pressure air, discharging the rock slag outside the steel pipe 4 through rotation of the spiral drill rod 1, and enabling the first section of steel pipe 4 to simultaneously enter holes along with the drill bit when the broken rock mass is cut; when the construction is carried out to the designed depth, the construction is stopped, the spiral drill rod 1, the down-the-hole hammer 2 and the reaming bit 3 are dragged by the pipe curtain drilling machine to withdraw from the steel pipe 4, and when the reaming bit 3 is pulled outwards, the sliding block 3-2 is stressed to slide inwards, so that the spiral drill rod is withdrawn from the steel pipe 4 smoothly.
The foregoing is a further detailed description of the utility model in connection with the preferred embodiments, and it is not intended that the utility model be limited to the specific embodiments described. It will be apparent to those skilled in the art that several simple deductions or substitutions may be made without departing from the spirit of the utility model, and these should be considered to be within the scope of the utility model.
Claims (6)
1. The hard rock floor pipe curtain and pipe following construction device is characterized by comprising a spiral drill rod, a down-the-hole impactor and a reaming bit, wherein the spiral drill rod and the down-the-hole impactor are arranged in a steel pipe after being connected end to end; the front end face of the reaming bit is radially and slidably connected with a plurality of sliding blocks, a first annular step is arranged on the outer circle of the front end of the reaming bit, and the first annular step is positioned behind the sliding blocks; the front end fixedly connected with pipe shoe of steel pipe, be provided with the second annular step on the interior circle of pipe shoe, the front end setting of reamer bit is in the pipe shoe and make the slider stretches out outside the pipe shoe, the rear end of reamer bit is connected with down-the-hole hammer's front end, just first annular step and second annular step looks butt to make when reamer bit moves forward, drive the steel pipe moves forward.
2. The hard rock floor pipe curtain and pipe construction device according to claim 1, wherein a plurality of sliding grooves inclined backwards are uniformly distributed on the front end surface of the reaming bit in the radial direction, and the sliding blocks are clamped in the sliding grooves and can slide freely along the sliding grooves.
3. The hard rock floor pipe curtain and pipe construction device according to claim 2, wherein an air inlet hole is axially formed in the rear end of the reaming bit, a first air outlet hole is formed in the front end of the reaming bit in an outward inclined mode, and the first air outlet hole is communicated with the air inlet hole; and slag discharge grooves are axially formed in the outer circumferential surfaces of the reamer heads between the adjacent sliding blocks, and air outlets of the first air outlet holes are positioned on the front end surfaces of the reamer heads between the adjacent sliding blocks and correspond to the slag discharge grooves.
4. A hard rock floor pipe curtain pipe following construction device according to claim 3, wherein a second air outlet hole is formed in the front end of the reaming bit, the second air outlet hole is communicated with the air inlet hole, and an air outlet of the second air outlet hole is located in the sliding groove.
5. The hard rock floor pipe curtain and pipe construction device according to claim 1, wherein balls are arranged between the sliding blocks and the sliding grooves.
6. The apparatus of claim 1, wherein the auger stem is connected to the down-the-hole impactor via a reducing connector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321033038.XU CN220015180U (en) | 2023-05-04 | 2023-05-04 | Hard rock floor pipe curtain and pipe following construction device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321033038.XU CN220015180U (en) | 2023-05-04 | 2023-05-04 | Hard rock floor pipe curtain and pipe following construction device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220015180U true CN220015180U (en) | 2023-11-14 |
Family
ID=88693937
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321033038.XU Active CN220015180U (en) | 2023-05-04 | 2023-05-04 | Hard rock floor pipe curtain and pipe following construction device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220015180U (en) |
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2023
- 2023-05-04 CN CN202321033038.XU patent/CN220015180U/en active Active
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