CN117365376A - Method for preventing hole collapse and drill sticking in pipe shed drilling construction - Google Patents

Method for preventing hole collapse and drill sticking in pipe shed drilling construction Download PDF

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Publication number
CN117365376A
CN117365376A CN202311657310.6A CN202311657310A CN117365376A CN 117365376 A CN117365376 A CN 117365376A CN 202311657310 A CN202311657310 A CN 202311657310A CN 117365376 A CN117365376 A CN 117365376A
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CN
China
Prior art keywords
pipe
blocking plug
slurry
drill
drilling
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Pending
Application number
CN202311657310.6A
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Chinese (zh)
Inventor
王一村
王凤安
杨智乐
徐晓健
丁徐益
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PowerChina Northwest Engineering Corp Ltd
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PowerChina Northwest Engineering Corp Ltd
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Priority to CN202311657310.6A priority Critical patent/CN117365376A/en
Publication of CN117365376A publication Critical patent/CN117365376A/en
Pending legal-status Critical Current

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    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21BEARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B33/00Sealing or packing boreholes or wells
    • E21B33/10Sealing or packing boreholes or wells in the borehole
    • E21B33/13Methods or devices for cementing, for plugging holes, crevices or the like
    • E21B33/138Plastering the borehole wall; Injecting into the formation
    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21BEARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B33/00Sealing or packing boreholes or wells
    • E21B33/10Sealing or packing boreholes or wells in the borehole
    • E21B33/12Packers; Plugs
    • E21B33/127Packers; Plugs with inflatable sleeve
    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D9/00Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
    • E21D9/001Improving soil or rock, e.g. by freezing; Injections

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Geology (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Soil Sciences (AREA)
  • Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)

Abstract

The invention discloses a method for preventing hole collapse and drill sticking in pipe shed drilling construction, which comprises the following steps: step 1, exiting drilling equipment, and selecting a slurry blocking plug; step 2, installing a slurry blocking plug in a pipe shed drill hole; step 3, connecting a cement slurry injection pipe with cement slurry injection equipment; step 4, pumping cement paste, and reinforcing a grouting section; and 5, removing the slurry blocking plug, the hose and the cement slurry injection pipe, and re-drilling. According to the method, a pipe-in-pipe follow-up mode is adopted for pipe shed drilling construction, and a temporary slurry blocking plug is arranged at a hole collapse and drill clamping position, namely, the front end of the pipe-in-pipe is provided with a slurry blocking plug which is an expansion capsule pressed into liquid; setting a hose, pressing liquid into a slurry blocking plug through the hose to realize expansion slurry blocking, setting a temporary cement slurry injection pipe to inject cement slurry to strengthen surrounding rock, and then installing a drill bit and a drill rod to continuously drill; obviously saves the construction period and reduces the production cost.

Description

Method for preventing hole collapse and drill sticking in pipe shed drilling construction
Technical Field
The invention belongs to the technical field of hydropower and hydraulic engineering construction, and relates to a method for preventing hole collapse and drill sticking in pipe shed drilling construction.
Background
Along with the development of social economy, a plurality of hydro-electric and hydraulic engineering needs to be built on the large river in the high gorge valley area, and an advanced support mode is generally adopted in the construction of the poor section of the surrounding rock of the tunnel engineering so as to prevent instability caused by short self-stabilization time after the surrounding rock of the tunnel engineering is excavated. In many advanced support modes, the pipe shed support has the characteristics of relatively safety and reliability, but the pipe shed support has the defects that under unfavorable geological conditions of surrounding rock crack development, rock block overhead and the like of tunnel engineering, the phenomena of hole collapse and drill sticking occur frequently when the pipe shed is drilled, and once the holes collapse and drill sticking occur, the drilling on construction is stopped, the drilled holes become waste holes, the construction progress is greatly influenced, and a large amount of manpower and material resources are wasted.
Currently, in some hydropower stations and hydraulic engineering tunnel construction, investigation of a pipe shed advanced support mode is adopted in the construction of a poor section of surrounding rock, and as the pipe shed is generally long, in order to prevent the drilled holes from collapsing, a machined steel flower pipe (namely, a shed pipe forming the pipe shed) is followed behind a drill bit in the pipe shed drilling, and the steel flower pipe has the functions of preventing the drilled holes from collapsing, and grouting the surrounding rock by using the steel flower pipe after drilling is completed. If the surrounding rock is poor, the phenomena of hole collapse and drill sticking occur at the drill bit, the common treatment method is to pull out the drill bit and the drill rod, perform hole sealing injection cement slurry to strengthen the surrounding rock, then install the drill bit and the drill rod for continuous drilling, but the pipe shed drilling construction adopts a pattern pipe follow-up mode, and the cement slurry injection often causes the bonding of the steel pattern pipe in the hole and the surrounding rock on the pipe wall so as not to move forward.
Therefore, there is a need to develop a new method to solve the above technical problems.
Disclosure of Invention
The invention aims to provide a method for preventing hole collapse and drill sticking in pipe shed drilling construction, which solves the problem that in the prior art, a pattern pipe follow-up mode is adopted, and after cement slurry is injected, a steel pattern pipe in a hole is often bonded with surrounding rock of a pipe wall so as not to move forward.
The technical scheme adopted by the invention is that the method for preventing hole collapse and drill sticking in pipe shed drilling construction is implemented according to the following steps:
step 1, exiting drilling equipment, and selecting a slurry blocking plug;
step 2, installing a slurry blocking plug in a pipe shed drill hole;
step 3, connecting a cement slurry injection pipe with cement slurry injection equipment;
step 4, pumping cement paste, and reinforcing a grouting section;
and 5, removing the slurry blocking plug, the hose and the cement slurry injection pipe, and re-drilling.
The invention has the beneficial effects that a pipe follow-up mode is adopted for pipe shed drilling construction, and a temporary slurry blocking plug is arranged at the position of hole collapse and drill clamping, namely the front end of the pipe, and the slurry blocking plug is an expansion capsule pressed into liquid (water); setting a hose, pressing liquid (water) into an inner cavity of a slurry blocking plug through the hose to realize expansion slurry blocking, setting a temporary cement slurry injection pipe to inject cement slurry to strengthen surrounding rock, and then installing a drill bit and a drill rod to continue drilling; obviously saves the construction period and reduces the production cost.
Drawings
FIG. 1 is a schematic diagram of a prior art pipe-shed drilling construction arrangement;
FIG. 2 is a schematic longitudinal section view of a poor section grouting of a surrounding rock of a pipe shed drilling performed by the method of the invention;
FIG. 3 is a schematic drawing of the drill bit and drill rod continuing to drill after injecting cement slurry to strengthen surrounding rock according to the method of the invention.
In the figure, 1. Concrete jacket arch; 2. drilling holes on the pipe shed; 3. drilling holes in the pipe shed and following the pipe; 4. a hose; 5. a cement slurry injection pipe; 6. a slurry blocking plug; 7. grouting section; 8. a drill rod; 9. a drill bit.
Detailed Description
The invention will be described in detail below with reference to the drawings and the detailed description.
Referring to fig. 1, in normal construction, a plurality of pipe-cap boreholes 2 are provided in a concrete arch 1 at the tunnel entrance or exit, and one pipe-cap borehole and pipe 3 are provided in each pipe-cap borehole 2. When hole collapse and drill sticking occur in the pipe shed drilling construction, the components and the method can be adopted for treatment.
The method adopts the components that a slurry blocking plug 6 is arranged at the drilling clamping position of the pipe shed drilling hole 2 (the position where the hole collapse occurs in the construction of the pipe shed drilling hole 2), and the slurry blocking plug 6 is an expandable capsule; the slurry blocking plug 6 is communicated with a hose 4 for pressing in liquid (water), and a cement slurry injection pipe 5 penetrates through the slurry blocking plug 6 and is used for reinforcing the position of hole collapse and drill clamping when cement slurry enters a grouting section 7; the hose 4 is made of plastic or rubber materials.
The invention relates to a method for preventing hole collapse and drill sticking in pipe shed drilling construction, which is implemented according to the following steps:
and 1, exiting the drilling equipment, and selecting a slurry blocking plug 6. And a drill rod 8 and a drill bit 9 which exit the drilling equipment are used for selecting a slurry blocking plug 6 with proper size according to the size of the inner wall of the pipe shed drilling hole 2, connecting the slurry blocking plug 6 with a hose 4, and penetrating the cement slurry injection pipe 5 through the slurry blocking plug 6 to ensure the sealing of the slurry blocking plug 6.
And 2, installing a slurry blocking plug 6 in the pipe shed drilling hole 2. Feeding the slurry blocking plug 6 into the pipe-shed drilling hole 2 and placing the slurry blocking plug in a drilling clamping position (a position where a hole collapse occurs in the construction of the pipe-shed drilling hole 2), and taking a hole between the slurry blocking plug 6 and the deepest part of the pipe-shed drilling hole 2 as a grouting section 7 with poor section pressure of surrounding rock; starting a pressure pump to press liquid (water) into the slurry blocking plug 6 through the hose 4, so that the slurry blocking plug 6 expands until the slurry blocking plug is completely attached to and sealed with the inner wall of the pipe shed drilling hole 2; the choke plug 6 can be fed into a predetermined position by means of a drill rod, see fig. 2.
And 3, connecting a cement slurry injection pipe 5 with cement slurry injection equipment.
And 4, pumping cement paste to strengthen the grouting section 7. Starting cement slurry grouting equipment, adding cement slurry into a cement slurry injection pipe 5, pressurizing to perform pressure grouting at a hole collapse position in front of a slurry blocking plug 6, and reinforcing surrounding rock of a grouting section 7; the pressure of the cement slurry added into the grouting section 7 is kept to be 0.3 Mpa-0.5 Mpa, and the grouting section lasts for 30min.
And 5, removing the slurry blocking plug 6, the hose 4 and the cement slurry injection pipe 5, and re-drilling. Closing the pressure pump and the cement slurry injection equipment, and removing the slurry blocking plug 6, the hose 4 and the cement slurry injection pipe 5; the drill rod 8 and the drill bit 9 of the drilling equipment are restarted, and the drill rod 8 and the drill bit 9 are pushed to the original hole collapse position and then continue to drill, as shown in fig. 3.
Example 1
The processing object related parameters of this embodiment 3 are as follows: the engineering area of the tunnel is 60m 2 The method comprises the steps of carrying out a first treatment on the surface of the The diameter of the pipe shed drilling hole is 120mm, the diameter of the pipe shed drilling hole and the diameter of the steel flower pipe are 108mm, and the diameter of the hole (and grouting hole) of the steel flower pipe is 16mm.
And 1, exiting the drilling equipment, and selecting a slurry blocking plug 6. And a drill rod 8 and a drill bit 9 which exit the drilling equipment are used for selecting a slurry blocking plug 6 with proper size according to the size of the inner wall of the pipe shed drilling hole 2, connecting the slurry blocking plug 6 with a hose 4, and penetrating the cement slurry injection pipe 5 through the slurry blocking plug 6 to ensure the sealing of the slurry blocking plug 6.
And 2, installing a slurry blocking plug 6 in the pipe shed drilling hole 2. Feeding the slurry blocking plug 6 into the pipe-shed drilling hole 2 and placing the slurry blocking plug in a drilling clamping position (a position where a hole collapse occurs in the construction of the pipe-shed drilling hole 2), and taking a hole between the slurry blocking plug 6 and the deepest part of the pipe-shed drilling hole 2 as a grouting section 7 with poor section pressure of surrounding rock; starting a pressure pump to press liquid (water) into the slurry blocking plug 6 through the hose 4, so that the slurry blocking plug 6 expands until the slurry blocking plug is completely attached to and sealed with the inner wall of the pipe shed drilling hole 2; the choke plug 6 has a thickness of 4mm and a length of 0.5m. The choke plug 6 can be fed into a predetermined position by means of a drill rod, see fig. 2.
Step 3, connecting a cement slurry injection pipe 5 with cement slurry injection equipment; the diameter of the hose 4 and the diameter of the cement slurry injection pipe 5 are 25mm.
And 4, pumping cement paste to strengthen the grouting section 7. Starting cement slurry grouting equipment, adding cement slurry into a cement slurry injection pipe 5, pressurizing to perform pressure grouting at a hole collapse position in front of a slurry blocking plug 6, and reinforcing surrounding rock of a grouting section 7; the pressure of the cement slurry added into the grouting section 7 is kept to be 0.3 Mpa-0.5 Mpa, and the grouting section lasts for 30min.
And 5, removing the slurry blocking plug 6, the hose 4 and the cement slurry injection pipe 5, and re-drilling. Closing the pressure pump and the cement slurry injection equipment, and removing the slurry blocking plug 6, the hose 4 and the cement slurry injection pipe 5; the drill rod 8 and the drill bit 9 of the drilling equipment are restarted, and the drill rod 8 and the drill bit 9 are pushed to the original hole collapse position and then continue to drill, as shown in fig. 3.
After re-drilling, the hole wall of the pipe shed drilling hole 2 is detected to be good, hole collapse and drill sticking are avoided, and the condition of the hole wall is checked to be complete and smooth by using in-hole imaging equipment. It can be seen that the overall strength of the pipe shed drilled holes 2 after treatment is in an allowable range in the treatment process according to the method of the invention, and the design and construction requirements are completely met.
Example 2
The processing object related parameters of this embodiment 3 are as follows: the engineering area of the tunnel is 150m 2 The method comprises the steps of carrying out a first treatment on the surface of the The diameter of the pipe shed drilling hole is 135mm, the diameter of the pipe shed drilling hole and the diameter of the steel flower pipe are 122mm, and the diameter of the hole (and grouting hole) of the steel flower pipe is 16mm.
And 1, exiting the drilling equipment, and selecting a slurry blocking plug 6. And a drill rod 8 and a drill bit 9 which exit the drilling equipment are used for selecting a slurry blocking plug 6 with proper size according to the size of the inner wall of the pipe shed drilling hole 2, connecting the slurry blocking plug 6 with a hose 4, and penetrating the cement slurry injection pipe 5 through the slurry blocking plug 6 to ensure the sealing of the slurry blocking plug 6.
And 2, installing a slurry blocking plug 6 in the pipe shed drilling hole 2. Feeding the slurry blocking plug 6 into the pipe-shed drilling hole 2 and placing the slurry blocking plug in a drilling clamping position (a position where a hole collapse occurs in the construction of the pipe-shed drilling hole 2), and taking a hole between the slurry blocking plug 6 and the deepest part of the pipe-shed drilling hole 2 as a grouting section 7 with poor section pressure of surrounding rock; starting a pressure pump to press liquid (water) into the slurry blocking plug 6 through the hose 4, so that the slurry blocking plug 6 expands until the slurry blocking plug is completely attached to and sealed with the inner wall of the pipe shed drilling hole 2; the choke plug 6 is an expanded capsule pressed into liquid (water) and has a thickness of 4mm and a length of 0.8m. The choke plug 6 is fed into a predetermined position by means of a drill rod, see fig. 2.
Step 3, connecting a cement slurry injection pipe 5 with cement slurry injection equipment; the diameter of the hose 4 and the diameter of the cement slurry injection pipe 5 are 25mm.
And 4, pumping cement paste to strengthen the grouting section 7. Starting cement slurry grouting equipment, adding cement slurry into a cement slurry injection pipe 5, pressurizing to perform pressure grouting at a hole collapse position in front of a slurry blocking plug 6, and reinforcing surrounding rock of a grouting section 7; the pressure of the cement slurry added into the grouting section 7 is kept to be 0.3 Mpa-0.5 Mpa, and the grouting section lasts for 30min.
And 5, removing the slurry blocking plug 6, the hose 4 and the cement slurry injection pipe 5, and re-drilling. Closing the pressure pump and the cement slurry injection equipment, and removing the slurry blocking plug 6, the hose 4 and the cement slurry injection pipe 5; the drill rod 8 and the drill bit 9 of the drilling equipment are restarted, and the drill rod 8 and the drill bit 9 are pushed to the original hole collapse position and then continue to drill, as shown in fig. 3.
After re-drilling, the hole wall of the pipe shed drilling hole 2 is detected to be good, hole collapse and drill sticking are avoided, and the condition of the hole wall is checked to be complete and smooth by using in-hole imaging equipment. It can be seen that the overall strength of the pipe shed drilled holes 2 after treatment is in an allowable range in the treatment process according to the method of the invention, and the design and construction requirements are completely met.
Example 3
The processing object related parameters of this embodiment 3 are as follows: the engineering area of the tunnel is 100m 2 The method comprises the steps of carrying out a first treatment on the surface of the The diameter of the pipe shed drilling hole is 115mm, the diameter of the pipe shed drilling hole and the diameter of the steel pipe are 103mm, and the diameter of the hole (and grouting hole) of the steel pipe is 13mm.
And 1, exiting the drilling equipment, and selecting a slurry blocking plug 6. And a drill rod 8 and a drill bit 9 which exit the drilling equipment are used for selecting a slurry blocking plug 6 with proper size according to the size of the inner wall of the pipe shed drilling hole 2, connecting the slurry blocking plug 6 with a hose 4, and penetrating the cement slurry injection pipe 5 through the slurry blocking plug 6 to ensure the sealing of the slurry blocking plug 6.
And 2, installing a slurry blocking plug 6 in the pipe shed drilling hole 2. Feeding the slurry blocking plug 6 into the pipe-shed drilling hole 2 and placing the slurry blocking plug in a drilling clamping position (a position where a hole collapse occurs in the construction of the pipe-shed drilling hole 2), and taking a hole between the slurry blocking plug 6 and the deepest part of the pipe-shed drilling hole 2 as a grouting section 7 with poor section pressure of surrounding rock; starting a pressure pump to press liquid (water) into the slurry blocking plug 6 through the hose 4, so that the slurry blocking plug 6 expands until the slurry blocking plug is completely attached to and sealed with the inner wall of the pipe shed drilling hole 2; the choke plug 6 is an expanded capsule pressed into liquid (water) and has a thickness of 4mm and a length of 0.4m. The choke plug 6 is fed into a predetermined position by means of a drill rod, see fig. 2.
And 3, connecting cement slurry injecting equipment to the cement slurry injecting pipe 5, wherein the diameters of the hose 4 and the cement slurry injecting pipe 5 are 25mm.
And 4, pumping cement paste to strengthen the grouting section 7. Starting cement slurry grouting equipment, adding cement slurry into a cement slurry injection pipe 5, pressurizing to perform pressure grouting at a hole collapse position in front of a slurry blocking plug 6, and reinforcing surrounding rock of a grouting section 7; the pressure of the cement slurry added into the grouting section 7 is kept to be 0.3 Mpa-0.5 Mpa, and the grouting section lasts for 30min.
And 5, removing the slurry blocking plug 6, the hose 4 and the cement slurry injection pipe 5, and re-drilling. Closing the pressure pump and the cement slurry injection equipment, and removing the slurry blocking plug 6, the hose 4 and the cement slurry injection pipe 5; the drill rod 8 and the drill bit 9 of the drilling equipment are restarted, and the drill rod 8 and the drill bit 9 are pushed to the original hole collapse position and then continue to drill, as shown in fig. 3.
After re-drilling, the hole wall of the pipe shed drilling hole 2 is detected to be good, hole collapse and drill sticking are avoided, and the condition of the hole wall is checked to be complete and smooth by using in-hole imaging equipment. It can be seen that the overall strength of the pipe shed drilled holes 2 after treatment is in an allowable range in the treatment process according to the method of the invention, and the design and construction requirements are completely met.

Claims (6)

1. A method for preventing hole collapse and drill sticking in pipe shed drilling construction is characterized by comprising the following steps:
step 1, exiting drilling equipment, and selecting a slurry blocking plug (6);
step 2, installing a slurry blocking plug (6) in the pipe shed drilling hole (2);
step 3, connecting a cement slurry injection pipe (5) with cement slurry injection equipment;
step 4, pumping cement paste, and reinforcing a grouting section (7);
and 5, removing the slurry blocking plug (6), the hose (4) and the cement slurry injection pipe (5), and re-drilling.
2. The method for preventing hole collapse and drill sticking in pipe shed drilling construction according to claim 1, wherein the method comprises the following steps: the slurry blocking plug (6) is an inflatable capsule.
3. The method for preventing hole collapse and drill sticking in pipe shed drilling construction according to claim 1, wherein in step 1, the specific process is as follows:
and a drill rod (8) and a drill bit (9) which exit the drilling equipment are used for selecting a slurry blocking plug (6) with a proper size according to the size of the inner wall of the pipe shed drilling hole (2), connecting the slurry blocking plug (6) with a hose (4), and penetrating a cement slurry injection pipe (5) through the slurry blocking plug (6) to ensure the sealing of the slurry blocking plug (6) per se.
4. The method for preventing hole collapse and drill sticking in pipe shed drilling construction according to claim 1, wherein in step 2, the specific process is as follows:
feeding a slurry blocking plug (6) into a pipe shed drilling hole (2) and placing the slurry blocking plug in a drilling clamping position, and taking a hole between the slurry blocking plug (6) and the deepest part of the pipe shed drilling hole (2) as a grouting section (7) with poor section pressure of surrounding rock; and starting a pressure pump to press liquid into the slurry blocking plug (6) through the hose (4), so that the slurry blocking plug (6) expands until the slurry blocking plug is completely attached to and sealed with the inner wall of the pipe shed drilling hole (2).
5. The method for preventing hole collapse and drill sticking in pipe shed drilling construction according to claim 1, wherein in step 4, the specific process is as follows:
starting cement slurry grouting equipment, adding cement slurry into a cement slurry injection pipe (5), pressurizing to perform pressure grouting at a hole collapse position in front of a slurry blocking plug (6), and reinforcing surrounding rock of a grouting section (7); the pressure of the cement slurry added into the grouting section (7) is kept to be 0.3 Mpa-0.5 Mpa, and the grouting section lasts for 30min.
6. The method for preventing hole collapse and drill sticking in pipe shed drilling construction according to claim 1, wherein in step 5, the specific process is as follows:
closing the pressure pump and the cement slurry injection equipment, and removing the slurry blocking plug (6), the hose (4) and the cement slurry injection pipe (5); and restarting the drill rod (8) and the drill bit (9) of the drilling equipment, pushing the drill rod (8) and the drill bit (9) to the original hole collapse positions, and continuing to drill.
CN202311657310.6A 2023-12-06 2023-12-06 Method for preventing hole collapse and drill sticking in pipe shed drilling construction Pending CN117365376A (en)

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Application Number Priority Date Filing Date Title
CN202311657310.6A CN117365376A (en) 2023-12-06 2023-12-06 Method for preventing hole collapse and drill sticking in pipe shed drilling construction

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202311657310.6A CN117365376A (en) 2023-12-06 2023-12-06 Method for preventing hole collapse and drill sticking in pipe shed drilling construction

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CN114233374A (en) * 2021-11-01 2022-03-25 北京中煤矿山工程有限公司 Ground grouting construction method for reinforcing collapsed cavity area of inclined shaft after mud burst and water burst
CN114991774A (en) * 2022-06-20 2022-09-02 北京中煤矿山工程有限公司 Ground subsection descending type grouting method for crushed andesite basalt stratum

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