CN113483147A - Horizontal directional drilling and jacking pipe combined device and reinforced concrete pipe construction method - Google Patents
Horizontal directional drilling and jacking pipe combined device and reinforced concrete pipe construction method Download PDFInfo
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- CN113483147A CN113483147A CN202110669374.2A CN202110669374A CN113483147A CN 113483147 A CN113483147 A CN 113483147A CN 202110669374 A CN202110669374 A CN 202110669374A CN 113483147 A CN113483147 A CN 113483147A
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- pipe
- jacking
- horizontal directional
- directional drilling
- drill rod
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- 238000005553 drilling Methods 0.000 title claims abstract description 53
- 238000010276 construction Methods 0.000 title claims abstract description 20
- 239000011150 reinforced concrete Substances 0.000 title claims abstract description 8
- 238000005086 pumping Methods 0.000 claims description 12
- 239000010802 sludge Substances 0.000 claims description 12
- 238000007599 discharging Methods 0.000 claims description 8
- 238000011010 flushing procedure Methods 0.000 claims description 3
- 239000002131 composite material Substances 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- 239000002689 soil Substances 0.000 description 4
- 241001074085 Scophthalmus aquosus Species 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 244000208734 Pisonia aculeata Species 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L1/00—Laying or reclaiming pipes; Repairing or joining pipes on or under water
- F16L1/024—Laying or reclaiming pipes on land, e.g. above the ground
- F16L1/028—Laying or reclaiming pipes on land, e.g. above the ground in the ground
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/04—Directional drilling
- E21B7/046—Directional drilling horizontal drilling
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/28—Enlarging drilled holes, e.g. by counterboring
Abstract
The application discloses a horizontal directional drilling and pipe jacking combined device and a reinforced concrete pipe construction method, which are applied to the field of pipeline construction, and solve the technical problem that tool pipe jamming cannot be jacked when pipe jacking construction is carried out due to the fact that obstacles are likely to occur; has the technical effect that the tool pipe can be smoothly jacked in the pipe jacking construction.
Description
Technical Field
The application relates to the technical field of pipeline construction, in particular to a horizontal directional drilling and jacking combined device and a reinforced concrete pipe construction method.
Background
At present, a pipe jacking technology is usually adopted for trenchless laying, the surrounding environment is not influenced or the influence is small, the construction site is small, and the noise is low. But also can be deeply operated underground.
In the existing pipe jacking construction, a tool pipe or a heading machine is pushed from a working well to a receiving well through a soil layer by means of the thrust of a main jacking oil cylinder, an inter-pipeline relay and the like, and is hoisted. Meanwhile, the working pipe following the tool pipe or the heading machine is buried between the two wells, so that the construction of laying underground pipelines in a non-excavation mode is realized.
In view of the above-mentioned related technologies, the inventor believes that there is a defect that during pipe jacking construction, the pipe jacking cannot be jacked due to blockage caused by an obstacle.
Disclosure of Invention
In order to enable a working pipe to be smoothly jacked in the pipe jacking construction process, the application provides a horizontal directional drilling and pipe jacking combined device and a reinforced concrete pipe construction method.
In a first aspect, the application provides a horizontal directional drilling and pipe jacking combined device, which adopts the following technical scheme: the utility model provides a directional brill of level and push pipe composite set, is including setting up the push pipe device at the working well, push pipe direction one side of push pipe device is provided with the directional brill device of level, the directional brill device of level is connected with the drilling rod, be provided with multistage enlarger in the working well, the end of drilling rod passes and receives the well and insert in the working well, the end and the multistage enlarger of drilling rod are connected.
Through the technical scheme, the multistage reamer is pulled through the drill rod to perform reaming, and then the working pipe is jacked into the hole formed by reaming, so that the working pipe can be jacked smoothly during pipe jacking construction.
The application is further configured to: the pipe jacking device comprises a jack, a supporting plate is arranged on one side of the jack, a fixing hole is formed in the supporting plate, a fixing nail penetrates through the fixing hole, and the jack is fixed with the side wall of the supporting plate.
Through above-mentioned technical scheme, support the jack through the backup pad, guarantee the stability of jack, protect the inner wall of working well simultaneously, prevent that local pressure is too big and sink.
The application is further configured to: the side wall of the supporting plate is provided with a supporting cylinder, the side wall of the supporting cylinder is provided with a positioning hole, and a positioning bolt is connected to the positioning hole in a threaded manner.
Through above-mentioned technical scheme, fix a position the jack through a supporting cylinder, guarantee the stability that the jack set up.
The application is further configured to: the output end of the jack is provided with a jacking block, the side wall of the jacking block is provided with a limiting groove, a sliding rail is arranged below the jacking block, and the bottom end of the jacking block is provided with a sliding groove in sliding fit with the sliding rail.
Through the technical scheme, the moving direction of the jacking block is limited, so that the jacking of the working pipe is more stable.
The application is further configured to: the starting end of the multi-stage reamer is arranged in a conical shape, the drill rod is connected with the starting end of the multi-stage reamer, and the outer wall of the multi-stage reamer is provided with a spiral rib.
Through above-mentioned technical scheme, the initiating terminal of multistage enlarger sets up to conical, and the outer wall of multistage enlarger sets up spiral bead, makes multistage enlarger change in carrying out the broken wall reaming.
The application is further configured to: the tail end of the multistage reamer is rotatably connected with a transfer case, the tail end of the transfer case is provided with a machine head, and the tail end of the machine head is provided with a pipeline fixing part.
Through above-mentioned technical scheme, connect multistage enlarger and aircraft nose through the transfer case, when making multistage enlarger rotate, the aircraft nose does not rotate, fixes the working pipe through the aircraft nose, guarantees the stability that the working pipe pushed into.
The application is further configured to: the multi-stage reamer is arranged in a hollow mode, the drill rod is arranged to be a hollow pipe, the tail end of the drill rod is communicated with the multi-stage reamer, and a plurality of flushing holes are formed in the outer wall of the multi-stage reamer.
Through above-mentioned technical scheme, carry out the water injection through the drilling rod in to multistage reamer, the water of pouring into can go into the earth contact formation mud that the reaming produced, and it is too much to pile up earth in the avoiding hole, influences the top of working pipe and goes into.
The application is further configured to: be provided with in the aircraft nose and take out the silt pump, take out the silt end intercommunication of silt pump and have a pump-out silt pipe, the transfer case is hollow setting, the end of taking out the silt pipe inserts in the transfer case, the end and the transfer case intercommunication of multistage enlarger, the row's of taking out the silt pump end intercommunication has row's silt hose.
Through above-mentioned technical scheme, take out the silt pump and can take away the mud that produces through taking out the silt pipe, the rethread row's silt hose discharge guarantees going into in the smooth top of working pipe.
The application is further configured to: the tail end of the multi-stage reamer is arranged in a conical shape, and the transfer case is connected with the tip end of the tail end of the multi-stage reamer.
Through above-mentioned technical scheme, make water earlier with earth contact, prevent that water from directly rushing into in the transfer case.
In another aspect, the present application provides a method for constructing a small-caliber reinforced concrete pipe, including the steps of:
s1: drilling a drill rod into the ground through a horizontal directional drilling device, enabling the tail end of the drill rod to penetrate through a receiving well and then to be inserted into a working well, enabling the tail end of the drill rod to be communicated with the starting end of a multi-stage reamer, fixing the starting end of a working pipe in a pipeline fixing piece at the tail end of a machine head, and fixing the tail end of the working pipe in a limiting groove of a jacking block;
s2: the starting end of the drill rod is communicated with a municipal pipeline, the drill rod is pulled out through a horizontal directional drilling device, a jack is started to push a working pipe, and a sludge pump is started to pump sludge out of a pipe hole;
s3: after the multi-stage reamer, the transfer case and the machine head are pulled into the receiving well by the drill rod, the multi-stage reamer is detached from the drill rod, the working pipe is separated from the machine head, the multi-stage reamer, the transfer case and the machine head are lifted out of the receiving well, and then the drill rod is completely pulled out of the ground.
Through above-mentioned technical scheme, earlier carry out the reaming through the multistage enlarger of drilling rod pulling, can produce the pulling force to the working pipe when carrying out the pullback to the drilling rod, make the working pipe remove in the hole that the reaming formed, start jack simultaneously and carry out the jack-in to the working pipe, the working pipe can jack-in smoothly when making the push pipe construction.
To sum up, the beneficial technical effect of this application does:
1. firstly, pulling a multi-stage reamer through a drill rod to perform reaming, and then jacking a working pipe into a hole formed by reaming, so that the working pipe can be smoothly jacked in the pipe jacking construction;
2. the multistage reamer is connected with the machine head through the transfer case, so that when the multistage reamer rotates, the machine head does not rotate, the working pipe is fixed through the machine head, and the stability of jacking of the working pipe is ensured;
3. carry out the water injection through the drilling rod in to multistage enlarger, the earth contact that the reaming production can be gone into to the water of pouring into forms mud, avoids piling up earth too much in the hole, influences the top of working pipe and goes into.
Drawings
Fig. 1 is an overall configuration diagram of the present embodiment;
FIG. 2 is a sectional view of the present embodiment showing a work well;
FIG. 3 is a schematic diagram showing the construction of the apparatus in the well according to the present embodiment;
fig. 4 is an exploded view of the present embodiment showing the manner in which the multi-stage reamer is coupled to the transfer case;
fig. 5 is a sectional view of the handpiece of the present embodiment.
Description of the drawings, 1, a horizontal directional drilling machine; 2. a drill stem; 3. a multi-stage reamer; 4. a working well; 5. a receiving well; 6. a jack; 7. a support plate; 8. fixing nails; 9. a support cylinder; 10. a rotating bearing; 11. positioning the bolt; 12. jacking the block; 13. a slide rail; 14. a spiral rib; 15. a transfer case; 16. a machine head; 17. a fixing ring; 18. a sludge pump; 19. pumping a silt pipe; 20. a sludge discharge hose; 21. and a working pipe.
Detailed Description
The present application is described in further detail below with reference to the attached drawings.
Example (b):
referring to fig. 1, the horizontal directional drilling and pipe jacking combined device disclosed by the application comprises a pipe jacking device and a horizontal directional drilling device, wherein a working well 4 and a receiving well 5 are respectively dug on the ground at two ends of a pipe jacking position.
Referring to fig. 2 and 3, the pipe jacking device is fixed in the working well 4, the pipe jacking device comprises a jack 6, a supporting plate 7 is arranged on the side wall of the working well 4, fixing holes are respectively formed in the left side and the right side of the supporting plate 7, fixing nails 8 penetrate through the fixing holes, the fixing nails 8 are nailed into the side wall of the working well 4, and the supporting plate 7 is fixed through the fixing nails 8. The supporting cylinder 9 is vertically fixed on the side wall of the supporting plate 7, the jack 6 is placed in the supporting cylinder 9, four positioning holes are formed in the side wall of the supporting cylinder 9, the positioning holes are connected with the positioning bolts 11 in an internal thread mode, and the jack 6 can be fixed through screwing the positioning bolts 11.
Referring to fig. 3, the end of the output end of the jack 6 is connected with a jacking block 12, the side wall of the jacking block 12 is provided with a limiting groove for limiting the working pipe 21, the end of the working pipe 21 is inserted into the limiting groove, the limiting groove limits the working pipe 21, the stability of the working pipe 21 is ensured, and the working pipe 21 is prevented from deviating when being jacked. When the jack 6 is started, the jack 6 jacks the working pipe 21 towards the receiving well 5 through the jacking block 12. Slide rail 13 has been laid to the bottom of working well 4, and the spout has been seted up to the bottom of push-in block 12, slide rail 13 and spout sliding fit to carry on spacingly to the moving direction of push-in block 12, make working pipe 21 push-in more stable.
Referring to fig. 2 and 4, a multi-stage reamer 3 is placed in a working well 4, a transfer case 15 is provided at the end of the multi-stage reamer 3, and the transfer case 15 is provided in a cylindrical shape with both ends open. The outer wall of the tail end of the multistage reamer 3 is provided with a rotating bearing 10, the inner wall of an inner ring of the rotating bearing 10 is fixed with the outer wall of the tail end of the multistage reamer 3, the outer wall of an outer ring of the rotating bearing 10 is fixed with the inner wall of the starting end of the transfer case 15, and the tail end of the multistage reamer 3 is rotatably connected with the starting end of the transfer case 15.
Referring to fig. 3 and 5, a nose 16 is arranged at the end of the transfer case 15, a silt pumping pump 18 is fixed in the nose 16, a silt pumping end of the silt pumping pump 18 is communicated with a silt pumping pipe 19, and the end of the silt pumping pipe 19 penetrates out of the starting end of the nose 16 and is inserted into the transfer case 15 to be fixed with the inner wall of the transfer case 15. The sludge discharging end of the sludge pump 18 is communicated with a sludge discharging hose 20, and the tail end of the sludge discharging hose 20 penetrates out of the tail end of the machine head 16. The pipeline fixing part is arranged on the side wall of the tail end of the machine head 16 and is arranged as a fixing ring 17, a fixing bolt is connected to the side wall of the fixing ring 17 in a threaded mode, the starting end of the working pipe 21 is inserted into the fixing ring 17, and the working pipe 21 is fixed through the fixing bolt which is screwed. The tail end of the silt discharging hose 20 passes through the working pipe 21, and the jacking block 12 is provided with a through hole for the silt discharging hose 20 to pass through.
Referring to fig. 1 and 2, the horizontal directional drilling device is provided as a horizontal directional drilling machine 1, the horizontal directional drilling machine 1 is provided on the ground on one side of a receiving well 5, a drill rod 2 is connected to the horizontal directional drilling machine 1, the drill rod 2 can be rotatably inserted into the ground surface through the horizontal directional drilling machine 1, the end of the drill rod 2 passes through the receiving well 5, and finally the end of the drill rod 2 is inserted into a working well 4. The tail end of the drill rod 2 is provided with a pipe sleeve, and the drill rod 2 is fixedly connected with the starting end of the multi-stage reamer 3 through the pipe sleeve. The drill rod 2 is pulled back by the horizontal directional drilling machine 1, and the drill rod 2 drives the multistage reamer 3 to move.
Referring to fig. 2 and 4, the starting end of the multi-stage reamer 3 is in a conical shape, the connecting end of the multi-stage reamer 3 and the drill rod 2 is in a tip setting, so that the soil layer can be conveniently broken for reaming, the outer wall of the multi-stage reamer 3 is provided with the spiral rib 14, and the drill rod 2 can drive the multi-stage reamer 3 to rotate when being pulled back, so that the spiral rib 14 cuts the soil layer, and the reaming efficiency of the multi-stage reamer 3 is improved.
Referring to fig. 2 and 5, the drill rod 2 is arranged as a hollow pipe, the multistage reamer 3 is arranged in a hollow mode, when the drill rod 2 is pulled back, the starting end of the drill rod 2 is communicated with a municipal pipeline, water is injected into the multistage reamer 3 through the drill rod 2, a plurality of flushing holes are formed in the outer wall of the multistage reamer 3, and injected water can enter soil generated by reaming to contact and form slurry. The end of multistage enlarger 3 is conical setting, and transfer case 15 is most advanced setting with the link of multistage enlarger 3, makes water earlier with earth contact, prevents that water from directly rushing into in the transfer case 15. The pump 18 is activated and the pump 18 pumps the slurry produced through the pump 19 and out through the discharge hose 20, the slurry being transferred out of the working well 4 through the bucket. When the drill rod 2 is pulled back, the working pipe 21 is driven to move into a hole formed by reaming, the jack 6 is started while the drill rod 2 is pulled back, the jack 6 is enabled to push the jacking block 12 to jack a section of the working pipe 21, each section of the working pipe 21 is jacked, the silt discharging hose 20 is pulled out of the jacking block 12, penetrates through the next working pipe 21 to be jacked, and then penetrates out of the jacking block 12.
The implementation principle of the embodiment is as follows: can make drilling rod 2 rotatory insert the earth's surface through horizontal directional drilling machine 1, make the end of drilling rod 2 pass and receive well 5, the end of drilling rod 2 inserts in working well 4 at last and is connected with multistage enlarger 3, pull back drilling rod 2 through horizontal directional drilling machine 1, make multistage enlarger 3 carry out the reaming, can produce pulling force to working pipe 21 when pulling back drilling rod 2, make working pipe 21 remove in the hole that the reaming formed, start jack 6 simultaneously and push up working pipe 21, make working pipe 21 insert in the hole more easily.
The application also discloses a construction method of the small-caliber reinforced concrete pipe, which comprises the following steps:
s1: drilling the drill rod 2 into the ground through a horizontal directional drilling device, enabling the tail end of the drill rod 2 to firstly penetrate through the receiving well 5 and then to be inserted into the working well 4, enabling the tail end of the drill rod 2 to be communicated with the starting end of the multistage reamer 3, fixing the starting end of the working pipe 21 in a pipeline fixing piece at the tail end of the machine head 16, and fixing the tail end of the working pipe 21 in a limiting groove of the jacking block 12;
s2: the starting end of the drill rod 2 is communicated with a municipal pipeline, the drill rod 2 is pulled out through a horizontal directional drilling device, meanwhile, the jack 6 is started to push the working pipe 21, and the sludge pump 18 is started to pump out sludge in the pipe hole;
s3: after the drill pipe 2 pulls the multi-stage reamer 3, the transfer case 15 and the head 16 into the receiving well 5, the multi-stage reamer 3 is detached from the drill pipe 2, the working tube 21 is separated from the head 16, the multi-stage reamer 3, the transfer case 15 and the head 16 are lifted out of the receiving well 5, and then the drill pipe 2 is completely pulled out from the ground.
The embodiments of the present invention are preferred embodiments of the present application, and the scope of protection of the present application is not limited by the embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (10)
1. The utility model provides a horizontal directional drilling and push pipe composite set, is including setting up the push pipe device in working well (4), its characterized in that, push pipe direction one side of push pipe device is provided with horizontal directional drilling device, horizontal directional drilling device is connected with drilling rod (2), be provided with multistage enlarger (3) in working well (4), the end of drilling rod (2) passes receiving well (5) and inserts in working well (4), the end and the multistage enlarger (3) of drilling rod (2) are connected.
2. The combined device for the horizontal directional drilling and the pipe jacking as claimed in claim 1, wherein the pipe jacking device comprises a jack (6), a support plate (7) is arranged on one side of the jack (6), a fixing hole is formed in the support plate (7), a fixing nail (8) penetrates through the fixing hole, and the jack (6) is fixed with the side wall of the support plate (7).
3. The combined device for the horizontal directional drilling and the jacking pipe as claimed in claim 2, wherein a support cylinder (9) is arranged on the side wall of the support plate (7), a positioning hole is arranged on the side wall of the support cylinder (9), and a positioning bolt (11) is connected with the positioning hole in a threaded manner.
4. The combined device for the horizontal directional drilling and the pipe jacking as claimed in claim 2, wherein the output end of the jack (6) is provided with a jacking block (12), the side wall of the jacking block (12) is provided with a limiting groove, a sliding rail (13) is arranged below the jacking block (12), and the bottom end of the jacking block (12) is provided with a sliding groove in sliding fit with the sliding rail (13).
5. The combined horizontal directional drilling and pipe jacking device as claimed in claim 1, wherein the starting end of the multi-stage reamer (3) is arranged in a conical shape, the drill pipe (2) is connected with the starting end of the multi-stage reamer (3), and the outer wall of the multi-stage reamer (3) is provided with the spiral rib (14).
6. The combined horizontal directional drilling and jacking pipe device as claimed in claim 1, wherein the end of the multistage reamer (3) is rotatably connected with a transfer case (15), the end of the transfer case (15) is provided with a machine head (16), and the end of the machine head (16) is provided with a pipe fixing piece.
7. The combined horizontal directional drilling and pipe jacking device according to claim 5, wherein the multi-stage reamer (3) is arranged in a hollow manner, the drill rod (2) is arranged in a hollow pipe, the end of the drill rod (2) is communicated with the multi-stage reamer (3), and a plurality of flushing holes are formed in the outer wall of the multi-stage reamer (3).
8. The combined device of the horizontal directional drilling and the pipe jacking as claimed in claim 6, wherein a silt pumping pump (18) is arranged in the machine head (16), a silt pumping end of the silt pumping pump (18) is communicated with a silt pumping pipe (19), the transfer case (15) is arranged in a hollow manner, the tail end of the silt pumping pipe (19) is inserted into the transfer case (15), the tail end of the multistage reamer (3) is communicated with the transfer case (15), and a silt discharging end of the silt pumping pump (18) is communicated with a silt discharging hose (20).
9. A horizontal directional drilling and jacking pipe combination according to claim 8, wherein the end of the multi-stage reamer (3) is conically arranged, and the transfer case (15) is connected with the tip of the end of the multi-stage reamer (3).
10. A construction method of a small-caliber reinforced concrete pipe, which is applied to the horizontal directional drilling and jacking pipe combination device of any one of claims 1 to 9, and is characterized by comprising the following steps:
s1: drilling a drill rod (2) into the ground through a horizontal directional drilling device, enabling the tail end of the drill rod (2) to firstly penetrate through a receiving well (5) and then to be inserted into a working well (4), enabling the tail end of the drill rod (2) to be communicated with the starting end of a multi-stage reamer (3), fixing the starting end of a working pipe (21) in a pipeline fixing piece at the tail end of a machine head (16), and simultaneously fixing the tail end of the working pipe (21) in a limiting groove of a jacking block (12);
s2: the starting end of the drill rod (2) is communicated with a municipal pipeline, the drill rod (2) is pulled out through a horizontal directional drilling device, a jack (6) is started to push a working pipe (21), and a sludge pump (18) is started to pump sludge out of a pipe hole;
s3: after the multi-stage reamer (3), the transfer case (15) and the machine head (16) are pulled into the receiving well (5) by the drill rod (2), the multi-stage reamer (3) is detached from the drill rod (2), the working pipe (21) is separated from the machine head (16), the multi-stage reamer (3), the transfer case (15) and the machine head (16) are lifted out of the receiving well (5), and then the drill rod (2) is completely pulled out of the ground.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110669374.2A CN113483147A (en) | 2021-06-16 | 2021-06-16 | Horizontal directional drilling and jacking pipe combined device and reinforced concrete pipe construction method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110669374.2A CN113483147A (en) | 2021-06-16 | 2021-06-16 | Horizontal directional drilling and jacking pipe combined device and reinforced concrete pipe construction method |
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| CN113483147A true CN113483147A (en) | 2021-10-08 |
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| CN110242220A (en) * | 2019-05-13 | 2019-09-17 | 湖南达道新能源开发有限公司 | It is a kind of for excavating the rotary drill drill bit of geothermal drilling |
| CN111306360A (en) * | 2020-02-24 | 2020-06-19 | 广东省第四建筑工程有限公司 | Trenchless pipeline jacking and laying construction method |
| CN111794764A (en) * | 2020-06-30 | 2020-10-20 | 广东省第一建筑工程有限公司 | Jacking and pulling construction method |
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