CN111379516A - Hole forming method of cast-in-situ bored pile - Google Patents
Hole forming method of cast-in-situ bored pile Download PDFInfo
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- CN111379516A CN111379516A CN202010204999.7A CN202010204999A CN111379516A CN 111379516 A CN111379516 A CN 111379516A CN 202010204999 A CN202010204999 A CN 202010204999A CN 111379516 A CN111379516 A CN 111379516A
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- 238000000034 method Methods 0.000 title claims abstract description 47
- 238000011065 in-situ storage Methods 0.000 title claims abstract description 9
- 238000005553 drilling Methods 0.000 claims abstract description 148
- 238000010276 construction Methods 0.000 claims abstract description 27
- 239000011435 rock Substances 0.000 claims abstract description 21
- 239000002893 slag Substances 0.000 claims abstract description 21
- 239000002002 slurry Substances 0.000 claims abstract description 13
- 238000004140 cleaning Methods 0.000 claims abstract description 12
- 238000009527 percussion Methods 0.000 claims abstract description 9
- 229910000831 Steel Inorganic materials 0.000 claims description 22
- 239000010959 steel Substances 0.000 claims description 22
- 238000010408 sweeping Methods 0.000 claims description 5
- 238000007689 inspection Methods 0.000 claims description 3
- 230000007547 defect Effects 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000005422 blasting Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- 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
- E21B7/00—Special methods or apparatus for drilling
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- 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
- E21B47/00—Survey of boreholes or wells
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- 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
- E21B7/00—Special methods or apparatus for drilling
- E21B7/04—Directional drilling
-
- 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
- E21B7/00—Special methods or apparatus for drilling
- E21B7/20—Driving or forcing casings or pipes into boreholes, e.g. sinking; Simultaneously drilling and casing boreholes
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- 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
- E21B7/00—Special methods or apparatus for drilling
- E21B7/28—Enlarging drilled holes, e.g. by counterboring
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- Mining & Mineral Resources (AREA)
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- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
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- Piles And Underground Anchors (AREA)
Abstract
The invention relates to the technical field of bridge engineering and discloses a hole forming method of a cast-in-situ bored pile. For the covering layer, the rotary drilling rig is assembled with the rotary drilling bucket for the first drilling, so that the construction efficiency is high; after the rotary drilling rig enters the rock, firstly assembling a cone drum drill to perform secondary drilling, then replacing the pick drum drill to perform tertiary drilling, and then replacing cone drum drills with different sizes to perform step-by-step hole expansion, so that the problems of slow footage, drill jamming, drill rod fracture and the like caused by insufficient torque of the rotary drilling rig after the rotary drilling rig enters the rock can be avoided; and after reaming is in place, replacing the percussion drill to trim the hole pattern of the primary pile hole, and finally cleaning the formed pile hole by using a slurry circulating system to ensure that the drilling slag at the bottom of the pile hole is thoroughly removed. Based on the method, the advantage of high hole forming efficiency of the rotary drilling rig is fully utilized, meanwhile, the defect that hole cleaning of the rotary drilling rig is not complete is overcome, and the method has the advantages of high efficiency, low cost, small limitation, low safety risk, good hole forming quality and the like.
Description
Technical Field
The invention relates to the technical field of bridge engineering, in particular to a hole forming method of a cast-in-situ bored pile.
Background
With the rapid development of bridge construction in China, the span of a newly-built bridge is larger and larger, the structure is more and more complex, meanwhile, the design diameter of a pile foundation is larger and larger, the length of the pile foundation is longer and longer, and the corresponding rock-socketing depth is deeper and deeper. Therefore, the construction process of the pile foundation must be continuously updated and improved to meet the high requirements of newly-built bridges and ensure the stable development of bridge construction business in China.
In the construction process of the pile foundation, the hole forming process is the most critical, which not only affects the progress and the construction period of the whole project, but also directly concerns the quality of the pile foundation. The traditional pile foundation pore-forming method comprises the steps of hole forming by rotary drilling, hole forming by impact drilling, manual hole digging and the like, which have various defects:
1. the hole forming by the rotary drill is suitable for the soft geology of bedrock, is particularly suitable for the construction of a friction pile or an end-bearing type friction pile with the pile length of more than 100m, but has lower construction efficiency and higher cost;
2. the geological conditions suitable for the impact drilling hole forming are relatively wide, when the depth of the pile hole is within 70m, the hole forming efficiency is higher than that of the hole formed by the rotary drilling, but when the pile hole meets a hard rock stratum with underdeveloped cracks in the construction process, the hole forming efficiency is greatly reduced;
3. the manual hole digging is suitable for pile foundation construction with good geological conditions and reduced underground water level, when rock is encountered, blasting method can be adopted for auxiliary construction, but blasting construction needs to be far away from villages, roads and other areas with frequent population flow, the limitation is large, the hole digging depth is not more than 20m under general conditions, the construction efficiency is low, and the safety risk is large.
Disclosure of Invention
The invention aims to provide a hole forming method of a cast-in-situ bored pile, which has the advantages of high efficiency, low cost, small limitation and low safety risk.
In order to achieve the above object, the present invention provides a method for forming a hole in a cast-in-situ bored pile, comprising the steps of:
embedding a steel pile casing with the diameter of a at the pile position;
assembling a rotary drilling bucket with the diameter of b, and controlling the rotary drilling rig to perform first drilling until the drilling reaches an interface between the covering layer and the weathered rock stratum, wherein b is less than a;
assembling a cone barrel drill with the diameter of c, and operating the rotary drilling rig to perform second drilling on the basis of the first drilling, wherein the drilling reaches a hard rock stratum directly, and c is less than b;
assembling a cutting tooth barrel drill with the diameter of c, and operating the rotary drilling rig to perform third drilling on the basis of the second drilling until the drilling reaches the depth required by the pile foundation;
assembling a roller cone drill with the diameter d, and operating a rotary drilling rig to perform step-by-step hole expansion on a hole section formed by the second drilling and the third drilling until a primary pile hole with the hole diameter b is obtained, wherein c is more than d and less than or equal to b;
controlling a percussion drill to punch and smash the primary pile hole so as to smash drilling slag and trim the hole pattern until a formed pile hole with the hole depth meeting the pile foundation requirement is obtained;
and cleaning the formed pile hole in a reverse circulation mode by using a slurry circulation system.
In the above hole-forming method, the step of reaming step by step includes:
assembling a gear wheel barrel drill with the diameter of d ', and operating a rotary drilling rig to perform first hole expansion on a hole section formed by the second drilling and the third drilling, wherein c is more than d' and less than b;
and (5) assembling the cone barrel drill with the diameter b, and controlling the rotary drilling rig to perform secondary reaming on the basis of the primary reaming.
In the above hole-forming method, the step of reaming step by step further includes:
after the first reaming is carried out, assembling a rotary drilling bucket with the diameter of c, and controlling the rotary drilling rig to carry out hole sweeping and slag removal;
and after the second reaming, assembling the rotary drilling bucket with the diameter d', and controlling the rotary drilling rig to sweep the hole and remove slag.
In the above-described hole forming method, when the first hole enlargement is performed, the cutter barrel drill having the diameter d 'is provided with the pilot drill having the diameter c coaxial therewith, and when the second hole enlargement is performed, the cutter barrel drill having the diameter b is provided with the pilot drill having the diameter d' coaxial therewith.
In the above hole-forming method, the step of reaming step by step further includes:
and after the second reaming, assembling the cone barrel drill with the diameter of b and without the pilot bit, and controlling the rotary drilling rig to perform third reaming on the basis of the second reaming.
In the above hole-forming method, the step of reaming step by step further includes:
and after the third reaming, assembling the rotary drilling bucket with the diameter of b, and controlling the rotary drilling rig to sweep the hole and remove slag.
In the above hole forming method, the step of embedding the steel casing includes:
lofting the center of the pile foundation on a construction base plane by using a measuring instrument;
determining the position of the guide frame according to the center of the pile foundation, and then fixing the guide frame;
and controlling the crane to hoist the steel casing, taking the guide frame as a limiting device of the steel casing, and transferring and vibrating the steel casing until the steel casing is embedded into a preset depth.
In the above pore-forming method, the method further comprises the steps of:
before the rotary drilling rig is controlled to perform first drilling, the center of the pile foundation is lofted on a construction base surface by using a measuring instrument, then the position of a drill bit of the rotary drilling rig is adjusted to ensure that the drill bit is aligned with the center of the pile foundation, and meanwhile, the verticality of a drill rod of the rotary drilling rig is verified to ensure that the drill bit is in a vertical state.
In the hole forming method, the primary pile hole is cleaned in a positive circulation mode by using a slurry circulation system while the impact drilling machine is controlled to punch and smash the primary pile hole.
In the above pore-forming method, the method further comprises the steps of:
and after the hole cleaning of the formed pile hole is finished, detecting the formed pile hole by using an ultrasonic hole inspection instrument.
The invention provides a hole forming method of a cast-in-situ bored pile, which has the following beneficial effects compared with the prior art:
for the covering layer, the rotary drilling rig is assembled with the rotary drilling bucket for the first drilling, so that the construction efficiency is high; after the rotary drilling rig enters the rock, firstly assembling a cone barrel drill to perform secondary drilling, then replacing a pick barrel drill to perform tertiary drilling, and then replacing cone barrel drills with different sizes to perform step-by-step hole expansion until a primary pile hole with a hole diameter meeting the requirement is obtained, so that the problems of slow footage, drill jamming, drill rod breakage and the like caused by insufficient torque of the rotary drilling rig after the rotary drilling rig enters the rock can be effectively avoided; and after reaming is in place, replacing the percussion drill to trim the hole pattern of the primary pile hole, smashing the uncleaned drilling slag until a formed pile hole is obtained, and finally cleaning the formed pile hole in a reverse circulation mode by using a slurry circulation system to ensure that the drilling slag at the bottom of the pile hole is thoroughly removed and the quality of the pile foundation is ensured. Based on the method, the advantage of high hole forming efficiency of the rotary drilling rig is fully utilized, drilling slag is smashed through the impact drilling rig and cleaned through the mud reverse circulation system, the defect that hole cleaning of the rotary drilling rig is not complete is overcome, and the method has the advantages of high efficiency, low cost, small limitation, low safety risk, good hole forming quality and the like.
Drawings
FIG. 1 is a schematic diagram of step S6 of an embodiment of the present invention;
FIG. 2 is a schematic diagram of step S7 according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of step S8 according to an embodiment of the present invention;
FIG. 4 is a schematic illustration of step S9.1 of an embodiment of the present invention;
FIG. 5 is a schematic diagram of step S9.3 of an embodiment of the present invention;
fig. 6 is a schematic diagram of step S9.5 of an embodiment of the invention.
In the figure: 1. a cover layer; 2. a weathered rock formation; 3. a hard rock formation; 4. rotary digging a drilling bucket; 5. a cone drill; 6. a pilot; 7. a cutting tooth cylinder drill; 8. a pilot bit.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be understood that the terms "first", "second", etc. are used herein to describe various information, but the information should not be limited to these terms, which are only used to distinguish one type of information from another. For example, "first" information may also be referred to as "second" information, and similarly, "second" information may also be referred to as "first" information, without departing from the scope of the present invention.
As shown in fig. 1 to 6, an embodiment of the present invention provides a method for forming a hole in a cast-in-place bored pile, including the following steps:
s1, carrying out treatment such as leveling and reinforcing on the construction site, ensuring that the construction site has enough bearing capacity and ensuring that the drilling machine does not incline in the operation process.
And S2, arranging a slurry circulating system in advance according to the actual situation on site, and blending the slurry according to the proportion to enable the slurry index to meet the requirement of the construction specification.
S3, embedding a steel pile casing at the pile position, ensuring that the central deviation of the steel pile casing is not more than 10cm, the diameter a of the steel pile casing is 30cm larger than the diameter b of the pile foundation, and the verticality deviation of the steel pile casing is not more than 0.5%.
The specific construction process is as follows:
s3.1, lofting the center of the pile foundation on a construction base plane by using a measuring instrument;
s3.2, determining the position of the guide frame according to the center of the pile foundation, and then fixing the guide frame;
and S3.3, controlling the crane to hoist the steel casing, and taking the guide frame as a limiting device of the steel casing to transfer and vibrate the steel casing to sink until the steel casing is embedded into a preset depth.
S4, checking the mechanical properties of the rotary drilling rig and the percussion drilling rig, particularly the perpendicularity of a drill rod of the rotary drilling rig, the diameter of a hammer of the percussion drilling rig and the state of a steel wire rope of the percussion drilling rig, and simultaneously checking various types of drill bits.
And S5, lofting the center of the pile foundation on the construction base surface by using the measuring instrument again, adjusting the position of the drill bit by using a traveling system and an alignment system of the rotary drilling rig to ensure that the drill bit is aligned with the center of the pile foundation, and checking the verticality of the drill rod by using a checking system to ensure that the drill rod is in a vertical state.
And S6, assembling the rotary drilling bucket 4 with the diameter b as shown in the figure 1, and controlling the rotary drilling rig to perform the first drilling, wherein the first drilling reaches the interface between the covering layer 1 and the weathered rock layer 2. It should be noted that the depth of each drilling depth of the first drilling is 50cm, the drilling speed is slow at the beginning, the bucket is stable, the bucket is slow to lift, particularly, the perpendicularity is monitored by using a checking system of the rotary drilling rig at a position 5-8 m away from the top cylinder opening of the steel casing, and if deviation exists, measures are taken in time to correct the deviation.
And S7, as shown in figure 2, assembling the cone barrel drill 5 with the diameter of c, controlling the rotary drilling rig to drill for the second time on the basis of the first drilling, wherein the drilling reaches the hard rock stratum 3 directly, c is less than b, and in order to ensure that the drilling for the two times is coaxial, the cone barrel drill 5 with the diameter of c is provided with the pilot 6 with the diameter of b during the second drilling.
And S8, assembling the cutting-tooth barrel drill 7 with the diameter of c as shown in the figure 3, and controlling the rotary drilling rig to drill for the third time on the basis of the second drilling, wherein the drilling is performed until the depth required by the pile foundation. It should be noted that the working principle of the third drilling is as follows: firstly, the hard rock stratum 3 is subjected to circular cutting by using the cutter-tooth barrel drill 7, then the torque transmitted by the drill rod is converted into horizontal thrust to the rock core by using a spiral expansion plug arranged in the cutter-tooth barrel drill 7, the rock core is broken off, and then the rock core is taken out by using the friction force between the cutter-tooth barrel drill 7 and the rock core and is circulated until the depth required by a pile foundation is reached.
S9, assembling the cone barrel drill 5 with the diameter d, and operating the rotary drilling rig to perform step-by-step hole expansion on the hole sections formed by the second drilling and the third drilling until a primary pile hole with the hole diameter b is obtained, wherein c is larger than d and is not larger than b. The specific construction process is as follows:
s9.1, as shown in figure 4, assembling a gear barrel drill 5 with the diameter d ', and operating a rotary drilling rig to perform first hole expansion on a hole section formed by the second drilling and the third drilling, wherein c is more than d' < b;
s9.2, assembling the rotary drilling bucket 4 with the diameter of c, and controlling the rotary drilling rig to carry out hole sweeping and slag removal for the first time;
s9.3, assembling the cone barrel drill 5 with the diameter b as shown in the figure 5, and controlling the rotary drilling rig to perform second reaming on the basis of the first reaming;
s9.4, assembling the rotary drilling bucket 4 with the diameter d', and controlling the rotary drilling rig to perform hole sweeping and slag removing for the second time.
In order to ensure the coaxiality, the cone barrel drill 5 with the diameter d 'is provided with the pilot bit 8 with the diameter c coaxial with the cone barrel drill 5 for the first hole enlargement, and similarly, the cone barrel drill 5 with the diameter b is provided with the pilot bit 8 with the diameter d' coaxial with the cone barrel drill 5 for the second hole enlargement. In this regard, in order not to leave a dead space at the bottom of the pile hole without reaming, step S9 further includes:
s9.5, assembling the cone barrel drill 5 which has the diameter of b and is not provided with the pilot bit 8 as shown in the figure 6, and controlling the rotary drilling rig to perform third reaming on the basis of second reaming;
and S9.6, assembling the rotary drilling bucket 4 with the diameter b, and controlling the rotary drilling machine to carry out hole sweeping and slag removing for the third time to obtain the primary pile hole with the diameter b.
S10, operating the percussion drill to punch and smash the primary pile hole to smash the drilling slag and trim the hole pattern until a formed pile hole with the hole depth meeting the pile foundation requirement is obtained, meanwhile, cleaning the primary pile hole in a positive circulation mode by using a slurry circulation system, and properly increasing the consistency of slurry so as to fully float the drilling slag;
s11, cleaning the formed pile hole in a reverse circulation mode by using a slurry circulation system so as to thoroughly remove drilling slag;
and S12, detecting the formed pile hole by using an ultrasonic hole inspection instrument, wherein the qualified detection means that the hole forming process is completed, and the next construction process can be performed.
Compared with the prior art, the hole forming method of the cast-in-situ bored pile provided by the embodiment of the invention has the following beneficial effects:
for the covering layer 1, the rotary drilling rig is assembled with the rotary drilling bucket 4 for the first drilling, so that the construction efficiency is high; after the drilling machine enters the rock, firstly assembling the gear drum drill 5 to perform secondary drilling, then replacing the cutting gear drum drill 7 to perform tertiary drilling, and then replacing the gear drum drill 5 with different sizes to perform step-by-step hole expanding until a primary pile hole with the aperture meeting the requirement is obtained, so that the problems of slow drilling, drill jamming, drill rod fracture and the like caused by insufficient torque after the drilling machine enters the rock can be effectively avoided; and after reaming is in place, replacing the percussion drill to trim the hole pattern of the primary pile hole, smashing the uncleaned drilling slag until a formed pile hole is obtained, and finally cleaning the formed pile hole in a reverse circulation mode by using a slurry circulation system to ensure that the drilling slag at the bottom of the pile hole is thoroughly removed and the quality of the pile foundation is ensured. Based on the above, the hole forming method of the bored pile provided by the embodiment of the invention fully utilizes the advantage of high hole forming efficiency of the rotary drilling rig, and meanwhile, drilling slag is smashed by the impact drilling rig and cleaned by the mud reverse circulation system, so that the defect of incomplete hole cleaning of the rotary drilling rig is overcome, and the method has the advantages of high efficiency, low cost, small limitation, low safety risk, good hole forming quality and the like.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.
Claims (10)
1. A hole forming method of a cast-in-situ bored pile is characterized by comprising the following steps:
embedding a steel pile casing with the diameter of a at the pile position;
assembling a rotary drilling bucket with the diameter of b, and controlling the rotary drilling rig to perform first drilling until the drilling reaches an interface between the covering layer and the weathered rock stratum, wherein b is less than a;
assembling a cone barrel drill with the diameter of c, and operating the rotary drilling rig to perform second drilling on the basis of the first drilling, wherein the drilling reaches a hard rock stratum directly, and c is less than b;
assembling a cutting tooth barrel drill with the diameter of c, and operating the rotary drilling rig to perform third drilling on the basis of the second drilling until the drilling reaches the depth required by the pile foundation;
assembling a roller cone drill with the diameter d, and operating a rotary drilling rig to perform step-by-step hole expansion on a hole section formed by the second drilling and the third drilling until a primary pile hole with the hole diameter b is obtained, wherein c is more than d and less than or equal to b;
controlling a percussion drill to punch and smash the primary pile hole so as to smash drilling slag and trim the hole pattern until a formed pile hole with the hole depth meeting the pile foundation requirement is obtained;
and cleaning the formed pile hole in a reverse circulation mode by using a slurry circulation system.
2. The method for forming a hole in a bored pile according to claim 1, wherein the step of enlarging the hole in stages includes:
assembling a gear wheel barrel drill with the diameter of d ', and operating a rotary drilling rig to perform first hole expansion on a hole section formed by the second drilling and the third drilling, wherein c is more than d' and less than b;
and (5) assembling the cone barrel drill with the diameter b, and controlling the rotary drilling rig to perform secondary reaming on the basis of the primary reaming.
3. The method for forming a hole in a bored pile according to claim 2, wherein the step of enlarging the hole in stages further includes:
after the first reaming is carried out, assembling a rotary drilling bucket with the diameter of c, and controlling the rotary drilling rig to carry out hole sweeping and slag removal;
and after the second reaming, assembling the rotary drilling bucket with the diameter d', and controlling the rotary drilling rig to sweep the hole and remove slag.
4. A method for forming a hole in a bored pile according to claim 2, wherein the first hole enlargement is performed by attaching a pilot bit of diameter c coaxial with the cutter barrel drill of diameter d ' to the cutter barrel drill of diameter d ', and the second hole enlargement is performed by attaching a pilot bit of diameter d ' coaxial with the cutter barrel drill of diameter b to the cutter barrel drill of diameter b.
5. The method for forming a hole in a bored pile according to claim 4, wherein the step of enlarging the hole in stages further includes:
and after the second reaming, assembling the cone barrel drill with the diameter of b and without the pilot bit, and controlling the rotary drilling rig to perform third reaming on the basis of the second reaming.
6. The method for forming a hole in a bored pile according to claim 5, wherein the step of enlarging the hole in stages further includes:
and after the third reaming, assembling the rotary drilling bucket with the diameter of b, and controlling the rotary drilling rig to sweep the hole and remove slag.
7. The method for forming a hole in a bored pile according to claim 1, wherein the step of embedding the steel casing includes:
lofting the center of the pile foundation on a construction base plane by using a measuring instrument;
determining the position of the guide frame according to the center of the pile foundation, and then fixing the guide frame;
and controlling the crane to hoist the steel casing, taking the guide frame as a limiting device of the steel casing, and transferring and vibrating the steel casing until the steel casing is embedded into a preset depth.
8. The method for forming a hole in a cast-in-place bored pile according to claim 1, further comprising the steps of:
before the rotary drilling rig is controlled to perform first drilling, the center of the pile foundation is lofted on a construction base surface by using a measuring instrument, then the position of a drill bit of the rotary drilling rig is adjusted to ensure that the drill bit is aligned with the center of the pile foundation, and meanwhile, the verticality of a drill rod of the rotary drilling rig is verified to ensure that the drill bit is in a vertical state.
9. The method for forming a bored pile according to claim 1, wherein the primary pile hole is cleaned in a positive circulation manner using a slurry circulation system while the hammer drill is operated to punch and smash the primary pile hole.
10. The method for forming a hole in a cast-in-place bored pile according to claim 1, further comprising the steps of:
and after the hole cleaning of the formed pile hole is finished, detecting the formed pile hole by using an ultrasonic hole inspection instrument.
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| CN202010204999.7A CN111379516A (en) | 2020-03-20 | 2020-03-20 | Hole forming method of cast-in-situ bored pile |
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| CN202010204999.7A CN111379516A (en) | 2020-03-20 | 2020-03-20 | Hole forming method of cast-in-situ bored pile |
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Cited By (10)
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| CN111894452A (en) * | 2020-07-27 | 2020-11-06 | 中交路桥建设有限公司 | Combined drilling method for end-bearing pile of aeolian sand deep-covering tuff stratum |
| CN111894451A (en) * | 2020-07-27 | 2020-11-06 | 中交路桥建设有限公司 | Rotary drilling pile foundation construction method for stratum combining aeolian sand, sand gravel and gravel |
| CN111946259A (en) * | 2020-08-14 | 2020-11-17 | 江苏省岩土工程勘察设计研究院 | Method for forming hole of cast-in-situ bored pile |
| CN112901074A (en) * | 2021-03-10 | 2021-06-04 | 中交第三航务工程局有限公司宁波分公司 | Rock-socketed drilling pore-forming process of marine large-diameter inclined pile rotary excavator |
| CN113738277A (en) * | 2021-08-12 | 2021-12-03 | 广东地山基础工程有限公司 | Punching hammer guiding device for vertical hole forming of punching cast-in-place pile |
| CN113738266A (en) * | 2021-08-27 | 2021-12-03 | 中交第二航务工程局有限公司 | Multi-stage drill bit fractional drilling pore-forming method of combined rotary drilling rig |
| CN113982480A (en) * | 2021-10-18 | 2022-01-28 | 中电建十一局工程有限公司 | Hard rock stratum cast-in-situ bored pile pore-forming construction method |
| CN114016995A (en) * | 2021-10-13 | 2022-02-08 | 江苏中海昇物联科技有限公司 | Piling auxiliary system of rotary drilling rig and piling method applying same |
| WO2022185861A1 (en) * | 2021-03-04 | 2022-09-09 | 東亜建設工業株式会社 | Method for extracting underwater resources |
| CN115961626A (en) * | 2022-12-08 | 2023-04-14 | 保利长大工程有限公司 | Underwater pile foundation casing anchoring method |
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| CN111894452A (en) * | 2020-07-27 | 2020-11-06 | 中交路桥建设有限公司 | Combined drilling method for end-bearing pile of aeolian sand deep-covering tuff stratum |
| CN111894451A (en) * | 2020-07-27 | 2020-11-06 | 中交路桥建设有限公司 | Rotary drilling pile foundation construction method for stratum combining aeolian sand, sand gravel and gravel |
| CN111946259A (en) * | 2020-08-14 | 2020-11-17 | 江苏省岩土工程勘察设计研究院 | Method for forming hole of cast-in-situ bored pile |
| CN111946259B (en) * | 2020-08-14 | 2021-07-23 | 江苏省岩土工程勘察设计研究院 | Method for forming hole of cast-in-situ bored pile |
| WO2022185861A1 (en) * | 2021-03-04 | 2022-09-09 | 東亜建設工業株式会社 | Method for extracting underwater resources |
| CN112901074A (en) * | 2021-03-10 | 2021-06-04 | 中交第三航务工程局有限公司宁波分公司 | Rock-socketed drilling pore-forming process of marine large-diameter inclined pile rotary excavator |
| CN112901074B (en) * | 2021-03-10 | 2024-02-13 | 中交第三航务工程局有限公司 | Rock-socketed drilling pore-forming technology of offshore large-diameter inclined pile rotary digging machine |
| CN113738277A (en) * | 2021-08-12 | 2021-12-03 | 广东地山基础工程有限公司 | Punching hammer guiding device for vertical hole forming of punching cast-in-place pile |
| CN113738266A (en) * | 2021-08-27 | 2021-12-03 | 中交第二航务工程局有限公司 | Multi-stage drill bit fractional drilling pore-forming method of combined rotary drilling rig |
| CN114016995A (en) * | 2021-10-13 | 2022-02-08 | 江苏中海昇物联科技有限公司 | Piling auxiliary system of rotary drilling rig and piling method applying same |
| CN113982480A (en) * | 2021-10-18 | 2022-01-28 | 中电建十一局工程有限公司 | Hard rock stratum cast-in-situ bored pile pore-forming construction method |
| CN115961626A (en) * | 2022-12-08 | 2023-04-14 | 保利长大工程有限公司 | Underwater pile foundation casing anchoring method |
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