CN110777777B - Construction method of long spiral soil taking and back mixing cement soil composite pile - Google Patents
Construction method of long spiral soil taking and back mixing cement soil composite pile Download PDFInfo
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- CN110777777B CN110777777B CN201911069003.XA CN201911069003A CN110777777B CN 110777777 B CN110777777 B CN 110777777B CN 201911069003 A CN201911069003 A CN 201911069003A CN 110777777 B CN110777777 B CN 110777777B
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- soil
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- 239000002689 soil Substances 0.000 title claims abstract description 82
- 239000004568 cement Substances 0.000 title claims abstract description 27
- 238000010276 construction Methods 0.000 title claims abstract description 22
- 239000002131 composite material Substances 0.000 title claims description 14
- 238000003756 stirring Methods 0.000 claims abstract description 11
- 239000004570 mortar (masonry) Substances 0.000 claims abstract description 7
- 239000000835 fiber Substances 0.000 claims abstract description 5
- 239000004576 sand Substances 0.000 claims description 23
- 239000004927 clay Substances 0.000 claims description 16
- 238000005553 drilling Methods 0.000 claims description 13
- 239000004567 concrete Substances 0.000 claims description 9
- 239000011150 reinforced concrete Substances 0.000 claims description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 5
- 239000010959 steel Substances 0.000 claims description 5
- 239000003513 alkali Substances 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- 230000003068 static effect Effects 0.000 claims description 3
- 239000004575 stone Substances 0.000 claims description 3
- 238000006073 displacement reaction Methods 0.000 abstract 2
- 239000006072 paste Substances 0.000 abstract 2
- 238000000034 method Methods 0.000 abstract 1
- 230000007547 defect Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
-
- 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
- E02D5/46—Concrete or concrete-like piles cast in position ; Apparatus for making same making in situ by forcing bonding agents into gravel fillings or the soil
-
- 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
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/22—Rods or pipes with helical structure
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Structural Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Geochemistry & Mineralogy (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention discloses a construction method of a long spiral drilled pile, which adopts a long spiral drill rod for construction, wherein the long spiral drill rod comprises a long spiral core pipe, spiral blades are arranged on the periphery of the core pipe, and gaps are arranged on the outer edges of the spiral blades; the core pipe is internally provided with a double-core pipeline, one pipeline is used for injecting cement paste, mortar or fiber mortar, and the other pipeline is used for delivering compressed air; the drill rod is positively rotated to drill, soil is in the helical blades, and in the process of rotating and lifting the blades, part of soil on the upper blades falls onto the lower helical blades to realize vertical displacement of the soil layer; lifting the drill rod in a reverse way, and replacing part of soil up and down again through the gap; when the drill pipe is lifted in a back pressure manner, the taken out part of soil and pumped cement paste, mortar or fiber mortar are stirred into the soil layer in a back pressure manner; and reversing again according to the stratum condition to perform up-and-down displacement stirring. The invention has convenient construction, good pile forming quality and wide applicable stratum, and solves the problem that the conventional stirring pile can not be stirred to form the pile.
Description
Technical Field
The invention relates to a construction method of a long spiral soil taking and back mixing cement soil composite pile.
Background
The existing construction method of the cement soil mixing pile has the defects of dense stratum, thick sand layer and gravel layer, frequent drill jamming, buried drill, incapability of drilling, labor and time waste, slow hole forming speed and unsatisfactory pile forming quality.
Disclosure of Invention
The invention aims to provide a construction method of a long spiral drilling pile capable of replacing a soil layer.
The technical solution of the invention is as follows:
a construction method of a long spiral soil taking and back mixing cement soil composite pile adopts a long spiral drill rod for construction, and is characterized in that: the long spiral drill rod comprises a long spiral core pipe, the periphery of the core pipe is provided with a through long spiral blade capable of cutting soil, the spiral blade is discontinuous, and each circle is provided with a plurality of gaps; the core pipe is internally provided with double-core pipelines, one pipeline is used for grouting, and the other pipeline is used for air supply; drilling by a drill rod in a forward rotation manner to cut a soil body; the drill rod is reversely lifted, and due to the fact that the spiral blade has a gap, the drill rod brings out part of soil body, and pressure grouting is carried out through a grouting channel while the drill rod is lifted; after the drill rod is lifted, forward drilling is carried out again, soil and sand are poured into each layer of spiral blade, and the spiral blade is carried into the soil layer to be conveyed and stirred; and reversing the lifting drill rod again to perform back pressure stirring to form the cement-soil pile.
And further, the core pile can be inserted into the cement soil when the cement soil is not hardened to form the cement soil composite pile.
The opening size of the notch is adjustable; the gap is semicircular, rectangular, triangular or quincunx.
The pressure grouting through the grouting channel is realized by pressing plain concrete, cement paste and mortar into a grouting pipeline in the core pipe through a pressure pump, when the soil layer at the bottom of the pile is sandy soil, alkali liquor is required to be added to prevent the sandy soil from hardening, and when the requirement on the horizontal force resistance of the pile body is high, fibers are required to be added.
And after the soil body and the sand stone are poured into each layer of spiral blade, according to the upper and lower distribution conditions of a clay layer and a sand layer in the soil layer, when drilling, the taken clay is poured into the space between the spiral blades with the specified height of the drill rod and is sent into the sand layer, the taken sand soil is poured into the space between the spiral blades with the specified height of the drill rod and is sent into the clay layer, if the soil layer is pure clay, sand stone needs to be additionally prepared, and if the soil layer is pure sand, cohesive soil needs to be additionally prepared.
The core inserting pile is a steel pipe pile, a steel pipe pile, a prefabricated plain concrete pile, a prefabricated reinforced concrete pile, a cast-in-place plain concrete pile and a cast-in-place reinforced concrete pile which are inserted into the cement pile in a static pressure, hammering and vibration pipe sinking mode.
The compressed air improves the drilling efficiency and improves the stirring uniformity.
The invention has convenient construction, good pile-forming quality and wide applicable stratum, solves the problem that the conventional stirring pile can not be stirred to form the pile, can reversely press the brought-out partial soil into the drilled hole and perform up-and-down replacement stirring on the soil layer when the stirring drilling tool lifts the drill through the variable cross-section gap at the outer edge of the spiral blade, realizes soil loosening, replacement and stirring, is convenient for construction, can improve the construction efficiency by 1.5-2 times, and improves the pile-forming quality.
Drawings
The invention is further illustrated by the following figures and examples.
Fig. 1 is a schematic view of the structure of a long auger stem.
Detailed Description
A construction method of a long spiral soil taking and back mixing cement soil composite pile adopts a long spiral drill rod for construction, the long spiral drill rod comprises a long spiral core pipe 1, the periphery of the core pipe is provided with a through long spiral blade 2 capable of cutting a soil body, the spiral blade is discontinuous, and each circumference is provided with a plurality of gaps 3; the core pipe is internally provided with double-core pipelines 4 and 5, one pipeline is used for grouting, and the other pipeline is used for air supply; drilling by a drill rod in a forward rotation manner, and cutting a soil body (cement slurry or other mixture can be injected at a certain depth); the drill rod is reversely lifted, and due to the fact that the spiral blade has a gap, the drill rod brings out part of soil body, and pressure grouting is carried out through a grouting channel while the drill rod is lifted; after the drill rod is lifted, forward drilling is carried out again, soil and sand are poured into each layer of spiral blade, and the spiral blade is carried into the soil layer to be conveyed and stirred; and reversing the lifting drill rod again to perform back pressure stirring to form the cement-soil pile.
Furthermore, the core pile can be inserted to form the cement-soil composite pile when the cement soil is not hardened.
The diameter of the long spiral core tube is 218 mm-327 mm;
the opening size of the notch is adjustable; the notch is in the shape of a semicircle, a rectangle, a triangle or a quincunx, or the combination of the shapes.
The pressure grouting through the grouting channel is realized by pressing plain concrete, cement paste and mortar into a grouting pipeline in the core pipe through a pressure pump, when the soil layer at the bottom of the pile is sandy soil, alkali liquor is required to be added to prevent the sandy soil from hardening, and when the requirement on the horizontal force resistance of the pile body is high, fibers are required to be added.
The soil and sand materials are poured into each layer of spiral blade, after a part of soil is taken out, according to the upper and lower distribution conditions of a clay layer and a sand layer in the soil layer, when drilling, the taken clay is poured into the space between the spiral blades with the specified height of the drill rod and is sent into the sand layer, the taken sand soil is poured into the space between the spiral blades with the specified height of the drill rod and is sent into the clay layer (sand and clay are mixed with each other), if the soil layer is pure clay, sand materials are additionally prepared, and if the soil layer is pure sand, cohesive soil is additionally prepared. If the clay is extra soft clay or silt, the clay is taken out and is not used.
The core inserting pile is used for inserting a steel pipe pile, a steel pipe pile, a prefabricated plain concrete pile, a prefabricated reinforced concrete pile, a cast-in-place plain concrete pile, a cast-in-place reinforced concrete pile or the pile type into the cement pile in a static pressure, hammering and vibration pipe sinking mode.
The compressed air improves the drilling efficiency and improves the stirring uniformity.
Claims (6)
1. A construction method of a long spiral soil taking and back mixing cement soil composite pile adopts a long spiral drill rod for construction, and is characterized in that: the long spiral drill rod comprises a long spiral core pipe, the periphery of the core pipe is provided with a through long spiral blade capable of cutting soil, the spiral blade is discontinuous, and each circle is provided with a plurality of gaps; the core pipe is internally provided with double-core pipelines, one pipeline is used for grouting, and the other pipeline is used for air supply; drilling by a drill rod in a forward rotation manner to cut a soil body; the drill rod is reversely lifted, and due to the fact that the spiral blade has a gap, the drill rod brings out part of soil body, and pressure grouting is carried out through a grouting channel while the drill rod is lifted; after the drill rod is lifted, the drill rod is rotated forward again, soil and/or sand and stone materials are poured into each layer of spiral blade and are carried into the soil layer to be conveyed and stirred; and reversing the lifting drill rod again to perform back pressure stirring to form the cement-soil pile.
2. The construction method of the long spiral soil-taking back-mixed cement soil composite pile as claimed in claim 1, characterized in that: and when the cement soil is not hardened, inserting the core pile to form the cement soil composite pile.
3. The construction method of the long spiral soil-taking back-mixed cement soil composite pile as claimed in claim 1, characterized in that: the opening size of the notch is adjustable; the gap is semicircular, rectangular, triangular or quincunx.
4. The construction method of the long spiral soil-taking back-mixed cement soil composite pile as claimed in claim 1, characterized in that: the pressure grouting through the grouting channel is realized by pressing plain concrete, cement paste and mortar into a grouting pipeline in the core pipe through a pressure pump, when the soil layer at the bottom of the pile is sandy soil, alkali liquor is required to be added to prevent the sandy soil from hardening, and when the requirement on the horizontal force resistance of the pile body is high, fibers are required to be added.
5. The construction method of the long spiral soil-taking back-mixed cement soil composite pile as claimed in claim 1, characterized in that: the soil and/or sand materials are poured into each layer of spiral blades, after part of soil is taken out, according to the upper and lower distribution conditions of a clay layer and a sand layer in the soil layer, when drilling is carried out, the taken clay is poured into the space between the spiral blades with the specified height of the drill rod and is sent into the sand layer, the taken sand soil is poured into the space between the spiral blades with the specified height of the drill rod and is sent into the clay layer, if the soil layer is pure clay, sand materials need to be additionally prepared, and if the soil layer is pure sand, cohesive soil needs to be additionally prepared.
6. The construction method of the long spiral soil-taking back-mixed cement soil composite pile as claimed in claim 2, characterized in that: the core inserting pile is a steel pipe pile, a prefabricated plain concrete pile, a prefabricated reinforced concrete pile, a cast-in-place plain concrete pile or a cast-in-place reinforced concrete pile which is inserted into the cement pile in a static pressure, hammering and/or vibration pipe sinking mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911069003.XA CN110777777B (en) | 2019-11-05 | 2019-11-05 | Construction method of long spiral soil taking and back mixing cement soil composite pile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911069003.XA CN110777777B (en) | 2019-11-05 | 2019-11-05 | Construction method of long spiral soil taking and back mixing cement soil composite pile |
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| Publication Number | Publication Date |
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| CN110777777A CN110777777A (en) | 2020-02-11 |
| CN110777777B true CN110777777B (en) | 2021-02-12 |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3831547A1 (en) * | 1988-09-16 | 1990-03-22 | Bauer Spezialtiefbau | Method of constructing a mortar column in the earth |
| CN102383430A (en) * | 2011-02-23 | 2012-03-21 | 上海城地建设发展有限公司 | Method for improving bearing capacity of pile bottom of pre-stressed centrifugal pipe pile (square pile) through in-pile boring |
| JP2013002226A (en) * | 2011-06-21 | 2013-01-07 | Gecoss Corp | Method of constructing enhanced soil-cement body and earth auger |
| JP2016130404A (en) * | 2015-01-13 | 2016-07-21 | 藤井 俊彦 | Method and device for constructing ground improvement pile |
| CN108589715A (en) * | 2018-05-10 | 2018-09-28 | 周同和 | One kind fetches earth Jet-Mixing Cement-Soil construction method |
| CN208056051U (en) * | 2017-07-25 | 2018-11-06 | 孙文 | Cement mixing pile with concrete core stake and its construction equipment |
| CN110318392A (en) * | 2019-07-03 | 2019-10-11 | 成都四海岩土工程有限公司 | A kind of major diameter cement earth pile method of construction |
| CN110344399A (en) * | 2019-05-15 | 2019-10-18 | 武汉谦诚桩工科技股份有限公司 | A kind of method and its Counterboring apparatus of pile body and the disposable pile of pile cover |
-
2019
- 2019-11-05 CN CN201911069003.XA patent/CN110777777B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3831547A1 (en) * | 1988-09-16 | 1990-03-22 | Bauer Spezialtiefbau | Method of constructing a mortar column in the earth |
| CN102383430A (en) * | 2011-02-23 | 2012-03-21 | 上海城地建设发展有限公司 | Method for improving bearing capacity of pile bottom of pre-stressed centrifugal pipe pile (square pile) through in-pile boring |
| JP2013002226A (en) * | 2011-06-21 | 2013-01-07 | Gecoss Corp | Method of constructing enhanced soil-cement body and earth auger |
| JP2016130404A (en) * | 2015-01-13 | 2016-07-21 | 藤井 俊彦 | Method and device for constructing ground improvement pile |
| CN208056051U (en) * | 2017-07-25 | 2018-11-06 | 孙文 | Cement mixing pile with concrete core stake and its construction equipment |
| CN108589715A (en) * | 2018-05-10 | 2018-09-28 | 周同和 | One kind fetches earth Jet-Mixing Cement-Soil construction method |
| CN110344399A (en) * | 2019-05-15 | 2019-10-18 | 武汉谦诚桩工科技股份有限公司 | A kind of method and its Counterboring apparatus of pile body and the disposable pile of pile cover |
| CN110318392A (en) * | 2019-07-03 | 2019-10-11 | 成都四海岩土工程有限公司 | A kind of major diameter cement earth pile method of construction |
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| CN110777777A (en) | 2020-02-11 |
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