CN110230314B - Pile foundation structure and construction method thereof - Google Patents
Pile foundation structure and construction method thereof Download PDFInfo
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- CN110230314B CN110230314B CN201910351436.8A CN201910351436A CN110230314B CN 110230314 B CN110230314 B CN 110230314B CN 201910351436 A CN201910351436 A CN 201910351436A CN 110230314 B CN110230314 B CN 110230314B
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- pile
- soil
- foundation
- sand
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- 238000010276 construction Methods 0.000 title claims abstract description 31
- 239000002689 soil Substances 0.000 claims abstract description 43
- 239000004576 sand Substances 0.000 claims abstract description 41
- 239000007788 liquid Substances 0.000 claims abstract description 30
- 235000015097 nutrients Nutrition 0.000 claims abstract description 30
- 239000004575 stone Substances 0.000 claims abstract description 25
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 claims abstract description 14
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 claims abstract description 14
- 159000000007 calcium salts Chemical class 0.000 claims abstract description 11
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims abstract description 7
- 235000019270 ammonium chloride Nutrition 0.000 claims abstract description 7
- 239000004202 carbamide Substances 0.000 claims abstract description 7
- 229910000030 sodium bicarbonate Inorganic materials 0.000 claims abstract description 7
- 235000017557 sodium bicarbonate Nutrition 0.000 claims abstract description 7
- 229910000831 Steel Inorganic materials 0.000 claims description 24
- 239000010959 steel Substances 0.000 claims description 24
- 238000000034 method Methods 0.000 claims description 10
- ZCCIPPOKBCJFDN-UHFFFAOYSA-N calcium nitrate Chemical compound [Ca+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O ZCCIPPOKBCJFDN-UHFFFAOYSA-N 0.000 claims description 8
- 230000001681 protective effect Effects 0.000 claims description 6
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical group [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims description 4
- 239000001110 calcium chloride Substances 0.000 claims description 4
- 229910001628 calcium chloride Inorganic materials 0.000 claims description 4
- 238000005553 drilling Methods 0.000 claims description 3
- HNYOPLTXPVRDBG-UHFFFAOYSA-N barbituric acid Chemical compound O=C1CC(=O)NC(=O)N1 HNYOPLTXPVRDBG-UHFFFAOYSA-N 0.000 claims description 2
- 241001478240 Coccus Species 0.000 claims 1
- 235000016709 nutrition Nutrition 0.000 claims 1
- 230000035764 nutrition Effects 0.000 claims 1
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 abstract description 20
- 229910000019 calcium carbonate Inorganic materials 0.000 abstract description 10
- 239000000463 material Substances 0.000 abstract description 8
- 239000004568 cement Substances 0.000 abstract description 4
- 230000007613 environmental effect Effects 0.000 abstract description 4
- 244000005700 microbiome Species 0.000 abstract description 4
- 241001057978 Balanococcus Species 0.000 abstract description 2
- 241000193385 Geobacillus stearothermophilus Species 0.000 abstract description 2
- 239000004567 concrete Substances 0.000 description 8
- 241000192023 Sarcina Species 0.000 description 4
- 241000193388 Bacillus thuringiensis Species 0.000 description 3
- 229940097012 bacillus thuringiensis Drugs 0.000 description 3
- 238000005266 casting Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000001556 precipitation Methods 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/10—Deep foundations
- E02D27/12—Pile foundations
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/12—Consolidating by placing solidifying or pore-filling substances in the soil
-
- 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
-
- 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
- E02D5/66—Mould-pipes or other moulds
Landscapes
- 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)
- General Engineering & Computer Science (AREA)
- Agronomy & Crop Science (AREA)
- Environmental & Geological Engineering (AREA)
- Soil Sciences (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
- Micro-Organisms Or Cultivation Processes Thereof (AREA)
Abstract
The pile foundation structure comprises a pile hole formed in a foundation, sand layers are arranged at the bottom and the side wall in the pile hole, a soil cushion layer is arranged above the foundation and the sand layers on the side wall, a pile core consisting of broken stone blocks is filled in a cavity surrounded by the sand layers and the soil cushion layer, balanococcus baronii liquid and nutrient solution are filled in the pile core, and the nutrient solution comprises urea 0.5mol/L, calcium salt 0.5mol/L, sodium bicarbonate 2.12g/L, nutrient broth 3g/L and ammonium chloride 10g/L. According to the invention, the bacillus stearothermophilus reacts with the nutrient solution to generate calcium carbonate so as to cement loose sand and gravel, and the foundation is cemented and solidified after being permeated, so that the strength of pile foundation soil is improved; the invention adopts the microorganism solidified soil material, has short construction period and has environmental protection and ecological compatibility.
Description
Technical Field
The invention relates to the technical field of pile foundations, in particular to a pile foundation structure and a construction method thereof.
Background
The pile foundation is a deep foundation consisting of piles and pile caps (called caps for short) connected with the tops of the piles or a single pile foundation connected with the piles by the piles. If the pile body is buried in the soil, the bottom surface of the bearing platform is contacted with the soil, the pile body is called a low bearing platform pile foundation; if the pile body upper portion is exposed to the ground and the pile cap bottom is located above the ground, the pile body is referred to as a high pile cap. Building piles are typically low pile foundations. In high-rise buildings, pile foundations are widely used. Pile foundation construction is a foundation engineering of building construction, and is important in the middle of the construction engineering. Pile foundations are of many different types, and can be divided into precast piles and cast-in-place piles according to the construction process. Precast piles are piles with corresponding shapes manufactured in factories or construction sites before construction, and piles are directly driven into soil by using pile drivers during working. After the bored concrete pile is required to be perforated at the pile position, a reinforcement cage is added into the bored concrete pile, and finally, concrete casting is performed to obtain a pile body. Along with the continuous improvement of the quality requirements of people on foundation engineering, the construction technology of building engineering is also required to be continuously improved.
The concrete casting materials of the existing pile foundations generally comprise common reinforced concrete, fluid concrete, fiber concrete, weak expansion concrete and the like. Along with the rapid development of social economy, the construction industry is rapidly improved, and new construction technology is continuously broken through. The pile casting material is not limited to concrete, so the inventor feels the need to propose a novel pile foundation structure based on the new material to further improve the strength of the pile foundation.
Disclosure of Invention
The invention aims to overcome the defects and shortcomings of the prior art, and provides a pile foundation structure for improving the strength of a pile foundation and improving the adhesive force of pile foundation pouring materials.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
The pile foundation structure comprises a pile hole formed in a foundation, sand layers are arranged at the bottom and the side wall in the pile hole, a soil cushion layer is arranged above the foundation and the sand layers on the side wall, a pile core consisting of broken stone blocks is filled in a cavity surrounded by the sand layers and the soil cushion layer, balanococcus baronii liquid and nutrient solution are filled in the pile core, and the nutrient solution comprises urea 0.5mol/L, calcium salt 0.5mol/L, sodium bicarbonate 2.12g/L, nutrient broth 3g/L and ammonium chloride 10g/L.
According to the invention, the bacillus thuringiensis sarcina reacts with the nutrient solution to generate calcium carbonate so as to cement loose sand and gravel, and the foundation is penetrated and then cemented and solidified, so that the strength of pile foundation soil is improved; in addition, the holes of the stone-crushing pile core are larger, and the Bazidosporus liquid and the nutrient solution can be better diffused in various parts such as a foundation, a sand layer, a soil cushion layer and the like, so that calcium carbonate generated by the reaction of the Bazidosporus liquid and the nutrient solution can not block grouting liquid, and the uniformity of calcium carbonate precipitation in the pile is improved; the construction process is simple, the working quality is ensured, the labor force is saved, the construction efficiency is improved, meanwhile, the waste soil outward transportation cost in urban construction is effectively reduced, and the construction cost is reduced; the invention adopts the microorganism solidified soil material, has short construction period and has environmental protection and ecological compatibility.
As an improvement of the invention, the crushed stone comprises gravel and sand.
As an improvement of the invention, the thickness of the soil cushion layer is 100-300 mm.
As an improvement of the present invention, the calcium salt is calcium chloride or calcium nitrate.
A construction method of a pile foundation structure comprises the following steps:
a pile hole is formed in the foundation by utilizing a pile drilling machine, and sundries in the pile hole are cleaned;
Firstly, paving a layer of bottom sand layer at the bottom of a pile hole, and then placing an outer steel protection pipe and an inner steel protection pipe in the pile hole, wherein the outer steel protection pipe is tightly attached to the inner wall of the pile hole;
Filling a side wall sand layer into a pile hole space between the outer steel protection pipe and the inner steel protection pipe until the side wall sand layer is level with a ground surface, and then pulling out the outer steel protection pipe;
Paving a soil cushion layer above the foundation and the side wall sand layer;
slowly putting crushed stone into the inner steel protective tube while slowly putting the crushed stone into the inner steel protective tube;
injecting the Bazidosoccus barbituric liquid into the gap of the stone blocks by using a grouting pipe, and standing for 30 minutes;
finally, filling nutrient solution into the gap of the crushed stone, wherein the nutrient solution comprises urea 0.5mol/L, calcium salt 0.5mol/L, sodium bicarbonate 2.12g/L, nutrient broth 3g/L and ammonium chloride 10g/L.
As an improvement of the invention, the crushed stone comprises gravel and sand.
As an improvement of the invention, in the step of injecting the spore-forming octacoccoid liquid into the gap of the stone blocks by using the grouting pipe and then standing for 30 minutes, when the spore-forming octacoccoid liquid is injected into the gap of the stone blocks by using the grouting pipe, the height difference between the liquid level of the spore-forming octacoccoid liquid in the grouting pipe and the surface of the soil cushion layer is at least maintained to be 3m, so that the spore-forming octacoccoid liquid is diffused into the foundation and the sand layer.
As an improvement of the invention, the thickness of the soil cushion layer is 100-300 mm.
As an improvement of the present invention, the calcium salt is calcium chloride or calcium nitrate.
Compared with the prior art, the invention has the following advantages:
According to the invention, the bacillus stearothermophilus reacts with the nutrient solution to generate calcium carbonate so as to cement loose sand and gravel, and the foundation is cemented and solidified after being permeated, so that the strength of pile foundation soil is improved;
In addition, the holes of the stone-crushing pile core are larger, and the Bazidosporus liquid and the nutrient solution can be better diffused in various parts such as a foundation, a sand layer, a soil cushion layer and the like, so that calcium carbonate generated by the reaction of the Bazidosporus liquid and the nutrient solution can not block grouting liquid, and the uniformity of calcium carbonate precipitation in the pile is improved;
The construction process is simple, the working quality is ensured, the labor force is saved, the construction efficiency is improved, meanwhile, the waste soil outward transportation cost in urban construction is effectively reduced, and the construction cost is reduced;
The invention adopts the microorganism solidified soil material, has short construction period and has environmental protection and ecological compatibility.
Drawings
FIG. 1 is a schematic view of a pile foundation structure of the present invention;
Fig. 2 is a schematic construction diagram of a pile foundation structure according to the present invention.
Detailed Description
The invention is further described below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the matters related to the present invention are shown in the accompanying drawings.
Example 1
Referring to fig. 1 and 2, a pile foundation structure comprises a pile hole 11 formed in a foundation 10, wherein sand layers 20 are respectively arranged at the bottom and the side wall in the pile hole 11, a soil cushion layer 30 is arranged above the foundation 10 and the side wall sand layers 20, a pile core 40 formed by stone blocks is filled in a cavity surrounded by the sand layers 20 and the soil cushion layer 30 in the pile hole 11, the pile core 40 is filled with sarcina bardanensis liquid and nutrient solution, and the nutrient solution comprises urea 0.5mol/L, calcium salt 0.5mol/L, sodium bicarbonate 2.12g/L, nutrient broth 3g/L and ammonium chloride 10g/L.
According to the invention, the bacillus thuringiensis sarcina reacts with the nutrient solution to generate calcium carbonate so as to cement loose sand and gravel, and the foundation is penetrated and then cemented and solidified, so that the strength of pile foundation soil is improved; in addition, the holes of the stone-crushing pile core are larger, and the Bazidosporus liquid and the nutrient solution can be better diffused in various parts such as a foundation, a sand layer, a soil cushion layer and the like, so that calcium carbonate generated by the reaction of the Bazidosporus liquid and the nutrient solution can not block grouting liquid, and the uniformity of calcium carbonate precipitation in the pile is improved; the construction process is simple, the working quality is ensured, the labor force is saved, the construction efficiency is improved, meanwhile, the waste soil outward transportation cost in urban construction is effectively reduced, and the construction cost is reduced; the invention adopts the microorganism solidified soil material, has short construction period and has environmental protection and ecological compatibility.
In this embodiment, the crushed stone includes gravel and sand. Gravel: a sediment with the grain size of 2-256 mm. The method is divided into three types of coarse gravel (64-256 mm), medium gravel (8-64 mm) and fine gravel (2-8 mm); sand stone: mineral or rock particles with the particle size of 0.074-2 mm; the gravel and the sand are mixed to be used as the pile core, so that the density of the pile core is ensured, and the pile core has a certain gap.
In this embodiment, the thickness of the soil pad layer 30 is 100 to 300mm. The soil cushion layer plays an important role in final sedimentation, pile soil stress ratio adjustment and pile soil horizontal load adjustment, the advantages of the pile are not exerted due to the fact that the soil cushion layer is too thick, the stress is too concentrated on the pile due to the fact that the soil cushion layer is too thin, and the effect of the soil is not exerted, and therefore the thickness of the soil cushion layer is set to be 100-300 mm, and stress balance among pile soil is facilitated to be balanced.
In this embodiment, the calcium salt is calcium chloride or calcium nitrate.
A construction method of a pile foundation structure comprises the following steps:
a pile hole 11 is formed in the foundation 10 by using a pile drilling machine, and sundries in the pile hole 11 are cleaned;
Firstly, paving a layer of bottom sand layer 20 at the bottom of a pile hole 11, and then placing an outer steel protection pipe 50 and an inner steel protection pipe 60 in the pile hole 11, wherein the outer steel protection pipe 50 is tightly attached to the inner wall of the pile hole 11;
Filling the side wall sand layer 20 into the pile hole 11 space between the outer steel protection pipe 50 and the inner steel protection pipe 60 until the side wall sand layer 20 is flush with the foundation 10 surface, and then pulling out the outer steel protection pipe 50;
Paving a soil cushion layer 30 above the foundation 10 and the sidewall sand layer 20;
Slowly putting crushed stone into the inner steel protective tube 60 while slowly putting the inner steel protective tube 60;
Injecting the bacillus thuringiensis sarcina liquid into the gap of the crushed stone by using a grouting pipe 70, and standing for 30 minutes;
finally, filling nutrient solution into the gap of the crushed stone, wherein the nutrient solution comprises urea 0.5mol/L, calcium salt 0.5mol/L, sodium bicarbonate 2.12g/L, nutrient broth 3g/L and ammonium chloride 10g/L.
In this embodiment, the crushed stone includes gravel and sand.
In this embodiment, in the step of injecting the spore-forming octacoccoid liquid into the gap of the crushed stone by using the grouting pipe and then standing for 30 minutes, when the spore-forming octacoccoid liquid is injected into the gap of the crushed stone by using the grouting pipe, the height difference between the liquid level of the spore-forming octacoccoid liquid in the grouting pipe and the surface of the soil cushion layer is at least 3m, so that the spore-forming octacoccoid liquid is diffused into the foundation and the sand layer.
The above examples are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above examples, and any other changes, modifications, substitutions, combinations, and simplifications that do not depart from the spirit and principle of the present invention should be made in the equivalent manner, and the embodiments are included in the protection scope of the present invention.
Claims (5)
1. A construction method of a pile foundation structure is characterized by comprising the following steps: the method comprises the following steps:
a pile hole is formed in the foundation by utilizing a pile drilling machine, and sundries in the pile hole are cleaned;
Firstly, paving a layer of bottom sand layer at the bottom of a pile hole, and then placing an outer steel protection pipe and an inner steel protection pipe in the pile hole, wherein the outer steel protection pipe is tightly attached to the inner wall of the pile hole;
Filling a side wall sand layer into a pile hole space between the outer steel protection pipe and the inner steel protection pipe until the side wall sand layer is level with a ground surface, and then pulling out the outer steel protection pipe;
Paving a soil cushion layer above the foundation and the side wall sand layer;
slowly pulling out the inner steel protective tube while putting crushed stone into the inner steel protective tube;
injecting the Bazidosoccus barbituric liquid into the gap of the stone blocks by using a grouting pipe, and standing for 30 minutes;
Finally, filling nutrient solution into the gap of the crushed stone, wherein the nutrient solution comprises urea 0.5mol/L, calcium salt 0.5mol/L, sodium bicarbonate 2.12g/L, nutrient broth 3g/L and ammonium chloride 10g/L;
pile foundation structure is including opening the stake hole on the ground, bottom and lateral wall in the stake hole all are equipped with the sand bed, the top on ground and lateral wall sand bed is equipped with the soil bed course, just the stake hole is at the cavity intussuseption that sand bed and soil bed course enclose by the broken stone and is constituteed the stake core, fill in the stake core and have the eight folding coccus liquid of baronions and nutrient solution, the nutrient solution includes urea 0.5mol/L, calcium salt 0.5mol/L, sodium bicarbonate 2.12g/L, nutrition broth 3g/L and ammonium chloride 10g/L.
2. The method of constructing a pile foundation structure of claim 1, wherein: the crushed stone includes gravel and sand.
3. The method of constructing a pile foundation structure of claim 1, wherein: when the Babbitt octacocccoli liquid is injected into the gap of the stone blocks by using the grouting pipe, the height difference between the liquid level of the Babbitt octacocccoli liquid in the grouting pipe and the surface of the soil cushion layer is at least 3m, so that the Babbitt octacocccoli liquid is diffused into the foundation and the sand layer.
4. The method of constructing a pile foundation structure of claim 1, wherein: the thickness of the soil cushion layer is 100-300 mm.
5. The method of constructing a pile foundation structure of claim 1, wherein: the calcium salt is calcium chloride or calcium nitrate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910351436.8A CN110230314B (en) | 2019-04-28 | 2019-04-28 | Pile foundation structure and construction method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910351436.8A CN110230314B (en) | 2019-04-28 | 2019-04-28 | Pile foundation structure and construction method thereof |
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| CN110230314A CN110230314A (en) | 2019-09-13 |
| CN110230314B true CN110230314B (en) | 2024-04-26 |
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| CN112252293A (en) * | 2020-10-12 | 2021-01-22 | 海南大学 | Equal-energy deformation composite foundation for solidifying aggregate by using microorganisms and construction method |
| CN112709213A (en) * | 2020-12-31 | 2021-04-27 | 湖南大学 | Method and device for curing top of gravel pile based on MICP technology |
| WO2022213766A1 (en) * | 2021-04-08 | 2022-10-13 | 中国长江三峡集团有限公司 | Microbiologically induced calcium carbonate precipitation gravel composite pile reinforcement structure and construction method |
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| JP2000170149A (en) * | 2000-01-01 | 2000-06-20 | Tokyo Sekkei Jimusho Kk | Forming method for underground pile and equipment therefor |
| CN101397793A (en) * | 2008-10-21 | 2009-04-01 | 叶长青 | Rammed concrete stiffening cement mixing pile and construction method thereof |
| CN103882858A (en) * | 2012-12-19 | 2014-06-25 | 五冶集团上海有限公司 | Construction method of micro-piles with diameter of 300 mm |
| CN105386436A (en) * | 2015-12-08 | 2016-03-09 | 南京林业大学 | Composite foundation with discrete material pile restrained through microorganism soil solidification and construction method |
| CN107938640A (en) * | 2017-11-23 | 2018-04-20 | 广东工业大学 | A kind of microorganism fixing the handles device and its construction technology for sand-layer foundation |
| CN211773563U (en) * | 2019-04-28 | 2020-10-27 | 广东工业大学 | Pile foundation structure |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102012023185A1 (en) * | 2012-11-28 | 2014-05-28 | Franki Grundbau Gmbh & Co.Kg | Method for producing a pile |
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2019
- 2019-04-28 CN CN201910351436.8A patent/CN110230314B/en active Active
Patent Citations (6)
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|---|---|---|---|---|
| JP2000170149A (en) * | 2000-01-01 | 2000-06-20 | Tokyo Sekkei Jimusho Kk | Forming method for underground pile and equipment therefor |
| CN101397793A (en) * | 2008-10-21 | 2009-04-01 | 叶长青 | Rammed concrete stiffening cement mixing pile and construction method thereof |
| CN103882858A (en) * | 2012-12-19 | 2014-06-25 | 五冶集团上海有限公司 | Construction method of micro-piles with diameter of 300 mm |
| CN105386436A (en) * | 2015-12-08 | 2016-03-09 | 南京林业大学 | Composite foundation with discrete material pile restrained through microorganism soil solidification and construction method |
| CN107938640A (en) * | 2017-11-23 | 2018-04-20 | 广东工业大学 | A kind of microorganism fixing the handles device and its construction technology for sand-layer foundation |
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