CN111962511A - Construction method for ultra-deep bored pile of combined rotary drilling rig of full-casing multifunctional drilling rig - Google Patents
Construction method for ultra-deep bored pile of combined rotary drilling rig of full-casing multifunctional drilling rig Download PDFInfo
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- CN111962511A CN111962511A CN202010881250.6A CN202010881250A CN111962511A CN 111962511 A CN111962511 A CN 111962511A CN 202010881250 A CN202010881250 A CN 202010881250A CN 111962511 A CN111962511 A CN 111962511A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D7/00—Methods or apparatus for placing sheet pile bulkheads, piles, mouldpipes, or other moulds
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
- E02D15/04—Placing concrete in mould-pipes, pile tubes, bore-holes or narrow shafts
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- Earth Drilling (AREA)
- Piles And Underground Anchors (AREA)
- Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
Abstract
A construction method for an ultra-deep drilling cast-in-place pile of a combined rotary drilling rig of a full-casing multifunctional drilling rig relates to the technical field of pile foundation construction. The method comprises the following construction steps: s1, aligning the full-casing multifunctional drilling machine to the pile position, simultaneously rotating the casing and the auger stem of the full-casing multifunctional drilling machine to drill down to a preset depth, and forming a hole; s2, removing the pile position by the full-casing multifunctional drilling machine; s3, positioning the rotary drilling rig, circulating slurry, and rotating a spiral drill rod of the rotary drilling rig to drill down to a designed depth to finish hole forming; s4, moving the rotary drilling rig, and hoisting the reinforcement cage into the drilled hole; s5, installing a guide pipe, pouring concrete until the concrete is positioned at a preset concrete elevation, and pulling out the guide pipe; and S6, moving the full-casing multifunctional drilling machine to a hole position, pulling out the casing and forming the pile. By adopting the technical scheme, the method has the advantages of high construction efficiency and high construction quality.
Description
Technical Field
The invention relates to the technical field of pile foundation construction, in particular to a construction method of an ultra-deep bored pile of a combined rotary drilling rig of a full-casing multifunctional drilling rig.
Background
The bored concrete pile is made up by directly making holes on the designed pile position, making its cross-section be circular, after the holes are formed, placing reinforcing cage in the holes and pouring concrete. At present, in pile foundation construction, due to the fact that geological complexity and piles are required to be deeper and deeper (50-100 m), proximity construction in urban areas is more and more, (close to subways, stations, houses and the like), and therefore full casing construction or long pile casing construction is often required.
However, when the rotary drilling rig is used for lengthening the pile casing for construction, the construction speed is slow, the pile casing is difficult to drill down and pull up, and the like, particularly when the depth of the pile casing exceeds 30m, the pull-up is very difficult, and the construction cannot be basically carried out when a stone filling layer with a slightly large grain diameter (more than 50-100 cmc) is encountered; and the single use of the full-casing multifunctional drilling machine, the maximum pore-forming of the drill rod and the casing is only 45m, namely, only the pile with the pore depth within 45m can be constructed, so that the construction problem of ultra-deep drilling is urgently needed to be solved.
Disclosure of Invention
The invention aims to provide a construction method of an ultra-deep bored pile by a combined rotary drilling rig of a full-casing multifunctional drilling rig, aiming at the defects and shortcomings of the prior art, and the construction method has the advantages of high construction efficiency and high construction quality.
In order to achieve the purpose, the invention adopts the technical scheme that: a construction method for an ultra-deep bored pile of a combined rotary drilling rig of a full-casing multifunctional drilling rig comprises the following construction steps: s1, aligning the full-casing multifunctional drilling machine to the pile position, simultaneously rotating the casing and the auger stem of the full-casing multifunctional drilling machine to drill down to a preset depth, and forming a hole; s2, removing the pile position by the full-casing multifunctional drilling machine; s3, positioning the rotary drilling rig, circulating slurry, and rotating a spiral drill rod of the rotary drilling rig to drill down to a designed depth to finish hole forming; s4, moving the rotary drilling rig, and hoisting the reinforcement cage into the drilled hole; s5, installing a guide pipe, pouring concrete until the concrete is positioned at a preset concrete elevation, and pulling out the guide pipe; and S6, moving the full-casing multifunctional drilling machine to a hole position, pulling out the casing and forming the pile.
The specific steps of S1 include: s11, presetting the embedded depth of the sleeve according to the site construction requirement; s12, simultaneously drilling down the casing pipe and the auger stem, and lifting up soil blocks and broken stones along with the rotation of the spiral blades on the auger stem and discharging the soil blocks and broken stones out of the drilling hole; and S13, idling for a plurality of circles when the casing pipe and the spiral drill rod are drilled to a preset depth, and lifting the spiral drill rod.
The specific steps of S2 include: s21, disassembling the casing, and lifting the casing joint of the full-casing multifunctional drilling machine to a position 90-110cm higher than the ground; s22, rotating the full-casing multifunctional drilling machine body to displace.
The specific steps of S6 include: s61, after the concrete pouring is finished, the multifunctional drilling machine should be timely shifted to a pile hole position to connect the sleeve; and S62, pulling out the sleeve before the initial setting of the pile concrete, and backfilling the hollow hole after the sleeve is pulled out.
After the technical scheme is adopted, the invention has the beneficial effects that: the construction advantages of the full-casing multifunctional drilling rig and the rotary drilling rig are integrated, the construction problem of a single construction machine in the ultra-deep bored concrete pile is solved, the safety of a close object is guaranteed in the close construction, the construction speed can be improved, the construction quality is guaranteed, and good social and economic benefits can be obtained in the construction process of the ultra-deep bored concrete pile in the future.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a flow chart of the construction method of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment as necessary without making a contribution thereto after reading the present specification, but all are protected by patent laws within the scope of the claims of the present invention.
The embodiment relates to a construction method of an ultra-deep bored pile of a combined rotary drilling rig of a full-casing multifunctional drilling rig, which relates to a main construction machine comprising: rotary drilling rig, full casing multifunctional drilling rig, crane and casing.
As shown in FIG. 1, the construction method of the ultra-deep bored pile by the combined rotary drilling rig of the full-casing multifunctional drilling rig comprises the following construction steps:
preparation before construction
1. Cleaning a construction site, removing impurities, filling soft soil, leveling, compacting and hardening;
2. and planning a mud pit, a reinforcement cage and a construction machine parking area.
Pile position lofting
Adopting a cross lofting method: cross-shaped pile guards are buried around the pile position and are buried stably, and mortar is used for reinforcing and protecting the pile guards so as to check the center of the pile position in the drilling process.
Embedding protective cylinder
Embedding a pile casing at a pile position, controlling the position deviation between the center of the pile casing and the center of the pile position within 5cm, wherein the embedding depth of the pile casing is 2-4m, and the height between the top of the pile casing and the ground is 0.3 m;
four, full casing multifunctional drilling machine pore-forming
1. Presetting the embedded depth of the sleeve according to the site construction requirement;
2. the drilling machine is in place, leveling is carried out, and the position deviation between the center of the drill bit and the center of the pile position is controlled within 2 cm;
3. and (3) forming holes, namely, simultaneously rotating a sleeve and a spiral drill rod of the full-sleeve multifunctional drilling machine to drill downwards, ascending soil blocks and broken stones along with the rotation of a spiral blade on the spiral drill rod to be discharged out of a drilling hole, idling for a plurality of circles when the sleeve and the spiral drill rod are drilled to a preset depth, and lifting the spiral drill rod.
4. The sleeve is disassembled, and the sleeve joint of the full-sleeve multifunctional drilling machine rises to be 90-110cm higher than the ground, so that the rotary drilling machine can be constructed smoothly, and the sleeve can be connected, disassembled and pulled up conveniently;
5. the full casing multifunctional drill body is rotated to displace the casing joint and auger stem.
Fifthly, forming holes by rotary drilling rig
1. Preparing slurry;
2. relay drilling: the rotary drilling rig is in place, mud circulates, a spiral drill rod of the rotary drilling rig rotates to drill down to the designed depth, hole forming is finished, in order to guarantee operation safety and prevent the casing from sinking, the mud surface in the hole of the rotary drilling rig is above the elevation surface of the casing 1/2 during construction, and the worse the field geological condition, the higher the mud surface is.
3. And (5) shifting the rotary drilling rig.
Sixthly, cleaning holes, checking and accepting;
seventhly, manufacturing and checking the reinforcement cage and installing the reinforcement cage into the drilled hole through a crane;
1. installing a guide pipe;
2. pouring concrete into the drill hole, pouring the concrete to the height of the top of the reinforcement cage, pulling out the guide pipe, and performing slurry treatment;
eighthly, pulling out the sleeve and forming a pile;
1. after the concrete pouring is finished, the multifunctional drilling machine is timely shifted to a pile hole position and connected with the sleeve;
2. and (4) pulling out the sleeve before the initial setting of the pile concrete, backfilling the hollow hole after the sleeve is pulled out, and timely recycling the overflowed slurry.
The working principle of the invention is roughly as follows: the construction method of the ultra-deep bored pile by the combined rotary drilling rig of the full-casing multifunctional drilling rig integrates the construction advantages of the full-casing multifunctional drilling rig and the rotary drilling rig, solves the construction problem of a single construction machine in the ultra-deep bored pile, ensures the safety of a close object in close-up construction, improves the construction speed, ensures the construction quality, and obtains good social and economic benefits in the construction process of the ultra-deep bored pile in future.
In the construction of the pile foundation of the extension project of a certain airport, the number of the piles is about 600, the diameter of the piles is 1.2m, the length of the piles is about 50-80m, 5 full-casing semi-rotary drilling machines and 3 rotary drilling machines are adopted in the original construction plan for construction, 2.5 piles are formed on average every day, and the actual construction period is at least 8 months. And then, the construction method is changed into the construction method for the ultra-deep bored pile by using the combined rotary drilling rig of the full-casing multifunctional drilling rig, 4-6 piles are constructed every day, the average number is 5 piles per day, the actual construction period is 4, and the construction speed is greatly improved.
The above description is only for the purpose of illustrating the technical solutions of the present invention and not for the purpose of limiting the same, and other modifications or equivalent substitutions made by those skilled in the art to the technical solutions of the present invention should be covered by the claims of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (4)
1. A construction method for an ultra-deep bored pile of a combined rotary drilling rig of a full-casing multifunctional drilling rig is characterized by comprising the following construction steps:
s1, aligning the full-casing multifunctional drilling machine to the pile position, simultaneously rotating the casing and the auger stem of the full-casing multifunctional drilling machine to drill down to a preset depth, and forming a hole;
s2, removing the pile position by the full-casing multifunctional drilling machine;
s3, positioning the rotary drilling rig, circulating slurry, and rotating a spiral drill rod of the rotary drilling rig to drill down to a designed depth to finish hole forming;
s4, moving the rotary drilling rig, and hoisting the reinforcement cage into the drilled hole;
s5, installing a guide pipe, pouring concrete until the concrete is positioned at a preset concrete elevation, and pulling out the guide pipe;
and S6, moving the full-casing multifunctional drilling machine to a hole position, pulling out the casing and forming the pile.
2. The construction method for the ultra-deep bored pile by the combined rotary drilling rig of the full-casing multifunctional drilling rig according to claim 1, wherein the specific step of S1 comprises:
s11, presetting the embedded depth of the sleeve according to the site construction requirement;
s12, simultaneously drilling down the casing pipe and the auger stem, and lifting up soil blocks and broken stones along with the rotation of the spiral blades on the auger stem and discharging the soil blocks and broken stones out of the drilling hole;
and S13, idling for a plurality of circles when the casing pipe and the spiral drill rod are drilled to a preset depth, and lifting the spiral drill rod.
3. The construction method for the ultra-deep bored pile by the combined rotary drilling rig of the full-casing multifunctional drilling rig according to claim 2, wherein the specific step of S2 comprises:
s21, disassembling the casing, and lifting the casing joint of the full-casing multifunctional drilling machine to a position 90-110cm higher than the ground;
s22, rotating the full-casing multifunctional drilling machine body to displace.
4. The construction method for the ultra-deep bored pile by the combined rotary drilling rig of the full-casing multifunctional drilling rig according to claim 3, wherein the specific step of S6 comprises:
s61, after the concrete pouring is finished, the multifunctional drilling machine should be timely shifted to a pile hole position to connect the sleeve;
and S62, pulling out the sleeve before the initial setting of the pile concrete, and backfilling the hollow hole after the sleeve is pulled out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010881250.6A CN111962511A (en) | 2020-08-27 | 2020-08-27 | Construction method for ultra-deep bored pile of combined rotary drilling rig of full-casing multifunctional drilling rig |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010881250.6A CN111962511A (en) | 2020-08-27 | 2020-08-27 | Construction method for ultra-deep bored pile of combined rotary drilling rig of full-casing multifunctional drilling rig |
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| Publication Number | Publication Date |
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| CN111962511A true CN111962511A (en) | 2020-11-20 |
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| CN202010881250.6A Pending CN111962511A (en) | 2020-08-27 | 2020-08-27 | Construction method for ultra-deep bored pile of combined rotary drilling rig of full-casing multifunctional drilling rig |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113187401A (en) * | 2021-04-23 | 2021-07-30 | 安徽创泰地基基础工程有限公司 | Full-rotation full-casing drilling machine capable of improving working efficiency based on construction and construction process thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106149684A (en) * | 2016-06-23 | 2016-11-23 | 上海腾尚基础工程有限公司 | A kind of full-sleeve long screw auger drilling deposited pile construction method |
| CN108589707A (en) * | 2018-05-14 | 2018-09-28 | 上海腾尚基础工程有限公司 | A kind of full-sleeve long screw auger and churning driven combined type construction |
-
2020
- 2020-08-27 CN CN202010881250.6A patent/CN111962511A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106149684A (en) * | 2016-06-23 | 2016-11-23 | 上海腾尚基础工程有限公司 | A kind of full-sleeve long screw auger drilling deposited pile construction method |
| CN108589707A (en) * | 2018-05-14 | 2018-09-28 | 上海腾尚基础工程有限公司 | A kind of full-sleeve long screw auger and churning driven combined type construction |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113187401A (en) * | 2021-04-23 | 2021-07-30 | 安徽创泰地基基础工程有限公司 | Full-rotation full-casing drilling machine capable of improving working efficiency based on construction and construction process thereof |
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Application publication date: 20201120 |
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