CN115450579A - Construction method for safely and quickly salvaging percussion drill bit - Google Patents
Construction method for safely and quickly salvaging percussion drill bit Download PDFInfo
- Publication number
- CN115450579A CN115450579A CN202211271424.2A CN202211271424A CN115450579A CN 115450579 A CN115450579 A CN 115450579A CN 202211271424 A CN202211271424 A CN 202211271424A CN 115450579 A CN115450579 A CN 115450579A
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- China
- Prior art keywords
- drill bit
- steel bar
- hole
- salvaging
- hoop
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- Pending
Links
- 238000010276 construction Methods 0.000 title claims abstract description 22
- 238000009527 percussion Methods 0.000 title claims abstract description 16
- 238000000034 method Methods 0.000 claims abstract description 12
- 238000005553 drilling Methods 0.000 claims abstract description 11
- 229910000831 Steel Inorganic materials 0.000 claims description 36
- 239000010959 steel Substances 0.000 claims description 36
- 239000002002 slurry Substances 0.000 claims description 16
- 239000002689 soil Substances 0.000 claims description 6
- 239000013049 sediment Substances 0.000 claims description 5
- 230000005484 gravity Effects 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 239000002893 slag Substances 0.000 claims description 3
- 230000003014 reinforcing effect Effects 0.000 claims description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000010438 granite Substances 0.000 description 3
- 230000001502 supplementing effect Effects 0.000 description 2
- 241000251468 Actinopterygii Species 0.000 description 1
- 101100366060 Caenorhabditis elegans snap-29 gene Proteins 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B31/00—Fishing for or freeing objects in boreholes or wells
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B31/00—Fishing for or freeing objects in boreholes or wells
- E21B31/03—Freeing by flushing
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Marine Sciences & Fisheries (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
The invention provides a construction method for safely and quickly salvaging a percussion drill bit, aiming at solving the problems that a drill bit is buried in a hole, the potential safety hazard of manually salvaging the drill bit from the bottom of a pile is eliminated and the increase of cost and construction period caused by the repair drilling of a pile position is reduced in the pile foundation drilling construction process.
Description
Technical Field
The invention belongs to the technical field of engineering construction such as building of railways and highways, and particularly relates to a construction method for safely and quickly salvaging a percussion drill bit.
Background
In the process of building foundation treatment and railway and highway bridge foundation engineering construction, in order to meet the requirements of earthquake resistance, settlement and the like, pile foundations are usually designed to solve the bearing capacity of foundation soil.
The engineering design is that a phi 1.0m bored pile foundation is drilled, geological exploration data (from top to bottom) sequentially comprise 2m powder clay layers sigma 0=100KPa → 4.1m thick round gravel soil sigma 0=300KPa → 0.9m completely weathered granite sigma 0=200KPa → 2.2m strong granite sigma 0=450KPa → 2.7m weak granite sigma 0=800KPa, a percussion drill (with hammer weight of 4.8 t) is selected for pore forming, the construction is carried out until a hole collapses at the position of-9.2 m, a steel wire rope is pulled off in the process that the percussion drill pulls the weathering drill upwards, and the weathering drill is buried in the hole.
The traditional solution is as follows: in the method, a professional is sent to the pile bottom to fasten the drill bit by the locking hook (the method has high safety risk); and the second method is connected with a design institute to carry out checking calculation on the foundation again, and a pile is supplemented nearby the pile position (the method needs to increase the investment of cost and has long period).
Disclosure of Invention
The invention provides a construction method for safely and quickly salvaging a percussion drill bit, aiming at solving the problems that a drill bit is buried in a hole due to the fact that hole collapse occurs in the pile foundation drilling construction process, the potential safety hazard of salvaging the drill bit manually from the bottom of a pile is eliminated, and the cost and the construction period are increased due to the fact that the pile position is subjected to drilling compensation.
The invention adopts the following technical scheme:
a construction method for safely and quickly salvaging a percussion drill bit comprises the following steps:
measuring the hole depth and the sediment thickness, and measuring the hole depth and the sediment thickness aiming at the pile position of a falling drill bit;
secondly, manufacturing slurry with the specific gravity of 1.1-1.3 and the viscosity of 19-28 s in a field slurry pond, and injecting the slurry into the pile through a slurry pump to fill the drilled hole;
thirdly, removing a covered soil layer on the upper part of the falling drill bit in the hole by using a spare drill bit, and removing drilling slag between the drill bit and the hole wall by using a reinforcing steel bar hammer;
fourthly, sleeving the hoop on the falling drill bit by using a steel bar hammer;
fifthly, injecting the slurry into the hole by using a slurry pump in a reverse circulation way, so that the friction force between the drill bit and the hole wall is reduced, and the drill bit is loosened;
and sixthly, penetrating the steel wire rope through the steel bar hoop at the gap of the drill bit, lifting one end of the steel wire rope out by using the steel bar hook, and placing the drill bit beside the steel wire rope by using the excavator after lifting the drill bit by using the winch.
Further, the diameter of the steel bar hammer in the third step is 28mm, the number of the steel bar hammers is 5, and the length of the steel bar hammer is 50cm.
Further, the hoop in the fourth step comprises a hoop with a diameter of 60cm and a hoop with a diameter of 80 cm.
Further, the diameter of the steel bar hook is 16mm, and the length of the steel bar hook is 11m.
The invention has the following beneficial effects
The method successfully solves the problem that the broken drill bit of the steel wire rope is buried in the hole after the hole collapse occurs during the percussion drilling construction, effectively avoids the risk of manually fishing the drill, and greatly reduces the investment of engineering cost and the problem solving efficiency compared with the prior construction experience (the foundation check calculation is carried out by contacting a design institute, and the drilling is carried out by supplementing the drill while bypassing).
Drawings
FIG. 1 is a schematic view of a wire rope breaking percussion drill bit dropping into a hole.
FIG. 2 is a schematic view of the top of a drill bit being cleared to be salvaged.
Fig. 3 is a schematic diagram of a reinforcing bar hammer for removing a drill bit clearance soil layer.
Fig. 4 is a schematic view of the rebar hammer hammering two rebar hoops into the drill to clamp.
Fig. 5 is a schematic view of the wire rope passing through the rebar hoop at the gap of the drill bit.
Fig. 6 is a schematic view of a winch pulling a wire rope to fish a drill bit.
Wherein: 1-a hoop; 2-a steel bar hammer; 3-a steel wire rope; 4-a spare drill bit; 5-a drill bit; 6-steel bar hook.
Detailed Description
The invention is further explained with reference to the accompanying drawings.
As shown in the figure, the construction method for safely and quickly salvaging the percussion drill bit adopts a self-made phi 28mm steel bar hammer to hammer two steel bar hoops into the drill bit for blocking, utilizes a steel wire rope to penetrate through the hoops, and uses a winch to lift the salvaged drill bit.
The method comprises the following specific steps:
1) Measuring the hole depth and the sediment thickness aiming at the pile position of the falling drill bit;
2) Manufacturing 5 reinforcing steel bar hammers with the length of 50cm on phi 28 reinforcing steel bars, manufacturing 2 hoops with the diameter of 60cm and 80cm on phi 20 reinforcing steel bars, and manufacturing 1 long hook with the length of 11m on phi 16 reinforcing steel bars;
3) Preparing high-density slurry (the specific gravity is 1.1-1.3, the viscosity is 19 s-28 s) from a field slurry tank, and injecting the high-density slurry into the pile through a slurry pump to fill the drilled hole with the high-density slurry;
4) Removing a covered soil layer on the upper part of a drill bit falling into the hole by using a spare drill bit, and removing drilling slag between the drill bit and the hole wall by using a self-made reinforcing steel bar hammer with the diameter of 28 mm;
5) Sleeving the processed hoops of 60cm and 80cm on the dropped drill bit by using a steel bar hammer;
6) The mud pump is used again for injecting the mud into the hole continuously in a reverse circulation mode, so that the friction force between the drill bit and the hole wall is reduced, and the drill bit is loosened;
7) And (3) penetrating the steel wire rope through the steel bar hoop at the gap of the drill bit, lifting one end of the steel wire rope out by using a phi 16 steel bar hook, and after the drill bit is lifted by using a winch, placing the drill bit beside the steel wire rope by using an excavator.
The method successfully solves the problem that the broken drill bit of the steel wire rope is buried in the hole after the hole collapse occurs during the percussion drilling construction, effectively avoids the risk of manually fishing the drill, and greatly reduces the investment of engineering cost and the problem solving efficiency compared with the prior construction experience (the foundation check calculation is carried out by contacting a design institute, and the drilling is carried out by supplementing the drill while bypassing).
Claims (4)
1. A construction method for safely and quickly salvaging a percussion drill bit is characterized by comprising the following steps: the method comprises the following steps:
measuring the hole depth and the sediment thickness, and measuring the hole depth and the sediment thickness aiming at the pile position of a falling drill bit;
secondly, slurry with the specific gravity of 1.1-1.3 and the viscosity of 19 s-28 s is manufactured in a field slurry pond and is injected into the pile through a slurry pump to fill the drilled hole;
thirdly, removing a covered soil layer on the upper part of the falling drill bit in the hole by using a spare drill bit, and removing drilling slag between the drill bit and the hole wall by using a steel bar hammer;
fourthly, sleeving the hoop on the falling drill bit by using a steel bar hammer;
fifthly, injecting the slurry into the hole by using a slurry pump in a reverse circulation mode ceaselessly, so that the friction force between the drill bit and the hole wall is reduced, and the drill bit is loosened;
and sixthly, penetrating the steel wire rope through the steel bar hoop at the gap of the drill bit, lifting one end of the steel wire rope out by using the steel bar hook, and placing the drill bit beside the steel wire rope by using the excavator after lifting the drill bit by using the winch.
2. The construction method of the safe and fast salvaging percussion drill bit according to claim 1 is characterized in that: in the third step, the diameter of the steel bar hammer is 28mm, the number of the steel bar hammers is 5, and the length of the steel bar hammer is 50cm.
3. The construction method of the safe and fast salvaging percussion drill bit according to claim 1 is characterized in that: in the fourth step, the hoop comprises a hoop with a diameter of 60cm and a hoop with a diameter of 80 cm.
4. The construction method of the safe and fast salvaging percussion drill bit according to claim 1 is characterized in that: the diameter of reinforcing bar crotch is 16mm, and length is 11m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211271424.2A CN115450579A (en) | 2022-10-18 | 2022-10-18 | Construction method for safely and quickly salvaging percussion drill bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211271424.2A CN115450579A (en) | 2022-10-18 | 2022-10-18 | Construction method for safely and quickly salvaging percussion drill bit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115450579A true CN115450579A (en) | 2022-12-09 |
Family
ID=84311251
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211271424.2A Pending CN115450579A (en) | 2022-10-18 | 2022-10-18 | Construction method for safely and quickly salvaging percussion drill bit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115450579A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5106140A (en) * | 1990-04-16 | 1992-04-21 | Knotts Edgar E | Oil-field wireline fishing tool |
| CN103470204A (en) * | 2013-09-26 | 2013-12-25 | 中铁十六局集团第三工程有限公司 | Drill fishing tool |
| US20140124717A1 (en) * | 2012-11-02 | 2014-05-08 | Malory Maltby | Fishing adapter |
| CN105113976A (en) * | 2015-07-21 | 2015-12-02 | 河南省公路工程局集团有限公司 | Wire-brush-bit rotary drilling jig and method for solving bit burying, falling and jamming |
| CN107476774A (en) * | 2017-08-28 | 2017-12-15 | 中国葛洲坝集团基础工程有限公司 | The processing method of burying in a kind of drill-pouring work progress mesopore |
| CN112796696A (en) * | 2020-12-28 | 2021-05-14 | 深圳市工勘岩土集团有限公司 | Magnetic clamping type salvaging method for major diameter bored concrete pile rotary drilling and drill dropping |
-
2022
- 2022-10-18 CN CN202211271424.2A patent/CN115450579A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5106140A (en) * | 1990-04-16 | 1992-04-21 | Knotts Edgar E | Oil-field wireline fishing tool |
| US20140124717A1 (en) * | 2012-11-02 | 2014-05-08 | Malory Maltby | Fishing adapter |
| CN103470204A (en) * | 2013-09-26 | 2013-12-25 | 中铁十六局集团第三工程有限公司 | Drill fishing tool |
| CN105113976A (en) * | 2015-07-21 | 2015-12-02 | 河南省公路工程局集团有限公司 | Wire-brush-bit rotary drilling jig and method for solving bit burying, falling and jamming |
| CN107476774A (en) * | 2017-08-28 | 2017-12-15 | 中国葛洲坝集团基础工程有限公司 | The processing method of burying in a kind of drill-pouring work progress mesopore |
| CN112796696A (en) * | 2020-12-28 | 2021-05-14 | 深圳市工勘岩土集团有限公司 | Magnetic clamping type salvaging method for major diameter bored concrete pile rotary drilling and drill dropping |
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