CN113026710A - Core inserting pile processing method combining foam concrete bottom expanding with upper soil body light solidification - Google Patents
Core inserting pile processing method combining foam concrete bottom expanding with upper soil body light solidification Download PDFInfo
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- CN113026710A CN113026710A CN202110260359.2A CN202110260359A CN113026710A CN 113026710 A CN113026710 A CN 113026710A CN 202110260359 A CN202110260359 A CN 202110260359A CN 113026710 A CN113026710 A CN 113026710A
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- foam concrete
- pile
- steel sleeve
- soil body
- combining
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- 239000011381 foam concrete Substances 0.000 title claims abstract description 61
- 239000002689 soil Substances 0.000 title claims abstract description 56
- 238000007711 solidification Methods 0.000 title claims abstract description 17
- 230000008023 solidification Effects 0.000 title claims abstract description 17
- 238000003672 processing method Methods 0.000 title claims abstract description 7
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 38
- 239000010959 steel Substances 0.000 claims abstract description 38
- 238000005553 drilling Methods 0.000 claims abstract description 27
- 239000006260 foam Substances 0.000 claims abstract description 20
- 238000005266 casting Methods 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 13
- 238000010276 construction Methods 0.000 claims description 9
- 230000002787 reinforcement Effects 0.000 claims description 4
- 239000000835 fiber Substances 0.000 claims description 3
- 238000003780 insertion Methods 0.000 claims description 3
- 230000037431 insertion Effects 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 9
- 239000002131 composite material Substances 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 3
- 239000004568 cement Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
Images
Classifications
-
- 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
-
- 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
- E02D3/02—Improving by compacting
- E02D3/08—Improving by compacting by inserting stones or lost bodies, e.g. compaction piles
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Structural Engineering (AREA)
- Agronomy & Crop Science (AREA)
- Environmental & Geological Engineering (AREA)
- Soil Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention discloses a core inserting pile processing method for foam concrete bottom expanding combined upper soil body light solidification, which comprises the following steps: driving the steel sleeve into a soft soil foundation, then drilling a hole and taking out a soil body in the steel sleeve to form an inner drilling hole, and reaming the bottom of the inner drilling hole; pouring foam concrete in the steel sleeve to a designed elevation to form bottom layer foam concrete; after the bottom layer foam concrete is poured, pouring foam solidified soil or upper layer foam concrete in the steel sleeve to reach the ground elevation; and pulling out the steel sleeve, and then inserting the prefabricated rigid pile into the center of the casting body in the steel sleeve to a certain depth of the foam concrete at the bottom layer. The invention has the advantages of reducing the additional stress of the foundation, avoiding vibration in pouring and greatly increasing the bearing capacity, is convenient and simple to construct and has great economy.
Description
Technical Field
The invention relates to the technical field of constructional engineering, in particular to a core inserting pile processing method combining foam concrete bottom expanding with upper soil body light solidification.
Background
The form that soft soil foundation treatment was used commonly when prefabricated rigid pile is used widely in engineering such as worker's civil engineering, highway, railway, harbour wharf, when foundation soil is softer, adopts increase stake footpath or increase stake length to satisfy the requirement of bearing capacity and deformation usually to lead to: (1) the construction cost is greatly increased, and the economy is poor; (2) the additional stress of the foundation is increased by the rigid piles, so that the improvement degree of the bearing capacity of the foundation is relatively reduced; (3) when the diameter of the prefabricated rigid pile is smaller, the end resistance and the side friction resistance in soft soil are smaller, so that the bearing capacity of the single pile is smaller. The problems make the prefabricated rigid pile have poor economy in the field of soft soil foundation treatment, and the strength and rigidity advantages of the prefabricated rigid pile cannot be exerted. Therefore, it is urgently needed to provide an application technology of the prefabricated rigid pile with relatively light weight and high cost performance.
In the application of the prefabricated rigid pile in soft soil, the technology of increasing the bearing capacity of the prefabricated rigid pile by adopting large-diameter cement stirring and combining with the middle rigid pile inserting core is also provided at present. However, the cement mixing soil has the characteristics of low strength and large weight, and the improvement range of the bearing capacity of the rigid pile is limited, so that the technology for treating the foundation of the core-inserting pile by combining the foam concrete bottom expanding with the light solidification of the upper soil body is provided.
Disclosure of Invention
The invention aims to solve the technical problem that in order to overcome the defects in the prior art, the invention provides the method for treating the mortise pile by combining the foam concrete bottom expansion with the light solidification of the upper soil body, which has the advantages of reducing the additional stress of the foundation, avoiding vibration in pouring, greatly increasing the bearing capacity, along with convenient and simple construction and great economy.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a core inserting pile processing method combining foam concrete bottom expanding and upper soil body light solidification comprises the following steps:
1) driving the steel sleeve into a soft soil foundation, then drilling a hole and taking out a soil body in the steel sleeve to form an inner drilling hole, and reaming the bottom of the inner drilling hole;
2) pouring foam concrete in the steel sleeve to a designed elevation to form bottom layer foam concrete;
3) after the bottom layer foam concrete is poured, pouring foam solidified soil or upper layer foam concrete in the steel sleeve to reach the ground elevation;
4) and pulling out the steel sleeve, and then inserting the prefabricated rigid pile into the center of the casting body in the inner drilling hole to a certain depth of the foam concrete at the bottom layer.
According to the technical scheme, in the step 1), the diameter of the inner drilling hole is 2-5 times of that of the prefabricated rigid pile, and the hole depth of the inner drilling hole is 3-5 m longer than the insertion length of the prefabricated rigid pile.
According to the technical scheme, in the step 1), the reaming depth of the bottom of the inner drilling hole is 1-3 m.
According to the technical scheme, in the step 2), the pouring height of the bottom layer foam concrete is 3-5 m.
According to the technical scheme, in the step 3), fibers are doped into the poured foam solidified soil or the upper layer foam concrete.
According to the technical scheme, before pouring the foam solidified soil or the upper layer of foam concrete in the step 3), the method further comprises the step of arranging a geosynthetic sleeve in the steel sleeve to serve as a circumferential reinforcement structure.
According to the technical scheme, in the step 4), the steel sleeve is pulled out through a vibrating hammer of the pile driver, the pulling speed is 0.8-1.8 m/min, and the steel sleeve is pulled out while vibrating.
According to the technical scheme, the prefabricated rigid pile is inserted into H below the upper surface of the bottom layer foam concrete, and the H is 2-3 times of the diameter of the prefabricated rigid pile.
According to the technical scheme, after the step 4), the method further comprises the following steps: and finishing construction after the foam concrete and the foam solidified soil are cured and solidified.
The invention has the following beneficial effects:
1. the invention adopts the foam concrete and the foam solidified soil as the pouring materials, has the advantages of light weight, simple and convenient cast-in-place construction and no vibration, and has great economy; the foam concrete and the foam solidified soil have lower density, have the characteristic of reducing the stress in the foundation and can greatly improve the bearing capacity of the foundation; the foam concrete bottom expanding can greatly increase the end resistance of the prefabricated rigid pile, and the foam solidified soil on the upper part can improve the side friction resistance of the rigid pile, so that the bearing capacity of a single pile is improved to a great extent; the invention has the advantages of simple construction, environmental protection and great economy.
2. The strength of the foam solidified soil or the foam concrete can be greatly improved by the circumferential reinforcement effect of the geosynthetic sleeve.
Drawings
Fig. 1 is a schematic structural diagram of a composite ferrule pile according to a first embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a core-inserting pile treatment combining foam concrete bottom expansion and upper soil mass light solidification in the first embodiment of the invention;
FIG. 3 is a schematic view of a construction sequence of a core-inserted pile processing method in which a foam concrete bottom expansion is combined with light solidification of an upper soil body in the embodiment of the invention;
FIG. 4 is a schematic structural diagram of a composite ferrule pile according to a second embodiment of the present invention;
in the figure, 1-foam concrete, 2-foam solidified soil, 3-prefabricated rigid pile, 4-composite core-inserting pile, 5-soft soil foundation, 6-steel sleeve, 7-internal drilling and 8-bottom reaming.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and examples.
Referring to fig. 1 to 3, a method for processing a core-inserted pile by combining a foam concrete bottom-expanded pile and an upper soil body for lightweight solidification in a first embodiment provided by the invention includes the following steps:
1) the steel sleeve 6 is driven into the soft soil foundation 5, then the soil body in the steel sleeve 6 is taken out through drilling to form an inner drilling hole 7, and the bottom of the inner drilling hole 7 is reamed through a reaming bit when the bottom of the drilling hole is drilled to form a bottom reaming hole 8;
2) pouring foam concrete 1 in the steel sleeve 6 to a designed elevation to form bottom layer foam concrete 1 as a bottom expanding layer;
3) after the bottom layer foam concrete 1 is poured, pouring foam solidified soil 2 into the steel sleeve 6 to reach the ground elevation;
4) and (3) vibrating and pulling out the steel sleeve 6, and then inserting the prefabricated rigid pile 3 into the center of the casting body in the inner drilling hole 7 to a certain depth of the bottom layer foam concrete 1.
5) And finishing construction after curing and solidifying the foam concrete 1 and the foam solidified soil 2 to form the composite inserting core pile 4, wherein the composite inserting core pile 4 has higher bearing capacity to fulfill the aim of reinforcing the soft soil foundation 5 as shown in figure 1, the construction sequence of the whole steps is as shown in figure 3, and the steps a to e are sequentially finished, wherein a in figure 3 is a schematic diagram of driving a steel sleeve into the soft soil foundation 5, b1 in figure 3 is a schematic diagram of reaming the bottom of an inner drilling hole, b2 in figure 3 is a schematic diagram of pouring bottom layer foam concrete into the steel sleeve, c in figure 3 is a schematic diagram of pouring the foam solidified soil 2 into the steel sleeve, d in figure 3 is a schematic diagram of pulling out the steel sleeve, and e in figure 3 is a schematic diagram of inserting a prefabricated rigid pile.
Further, in the step 1), the diameter of an inner drilling hole is 2-5 times of the diameter of the prefabricated rigid pile 3, and the depth of the inner drilling hole is 3-5 m longer than the insertion length of the prefabricated rigid pile 3; so that the bottom layer foam concrete 1 meets the requirements of impact and shear resistance.
Further, in the step 1), the reaming depth of the bottom of the inner drilling hole is 1-3 m.
Further, in the step 2), the pouring height of the bottom layer foam concrete 1 is 3-5 m.
Further, in the step 3), fibers are doped into the poured foam solidified soil 2 or the upper layer foam concrete; improving the strength of the steel.
Further, before pouring the foam solidified soil 2 or the upper layer of foam concrete in the step 3), the method also comprises the following steps of arranging a geosynthetic sleeve in the steel sleeve to serve as a circumferential reinforcement structure; to improve its strength.
Further, in the step 4), the steel sleeve is pulled out through a vibrating hammer of the pile driver, the pulling speed is preferably controlled to be 0.8-1.8 m/min, and the steel sleeve is pulled out while vibrating.
Furthermore, the prefabricated rigid pile 3 is inserted into H below the upper surface of the bottom layer foam concrete 1, wherein the H is 2-3 times the diameter of the prefabricated rigid pile 3.
The difference between the second embodiment of the present invention and the first embodiment is that in the step 3), the foam solidified soil 2 is poured into the steel sleeve to the ground elevation, and instead, the upper layer foam concrete is poured into the steel sleeve to form another composite socketed pile 4, as shown in fig. 4; the other steps in the second embodiment are the same as those in the first embodiment.
The above is only a preferred embodiment of the present invention, and certainly, the scope of the present invention should not be limited thereby, and therefore, the present invention is not limited by the scope of the claims.
Claims (9)
1. A core inserting pile processing method for combining foam concrete bottom expanding with upper soil body light solidification is characterized by comprising the following steps:
1) driving the steel sleeve into a soft soil foundation, then drilling a hole and taking out a soil body in the steel sleeve to form an inner drilling hole, and reaming the bottom of the inner drilling hole;
2) pouring foam concrete in the steel sleeve to a designed elevation to form bottom layer foam concrete;
3) after the bottom layer foam concrete is poured, pouring foam solidified soil or upper layer foam concrete in the steel sleeve to reach the ground elevation;
4) and pulling out the steel sleeve, and then inserting the prefabricated rigid pile into the center of the casting body in the inner drilling hole to a certain depth of the foam concrete at the bottom layer.
2. The method for treating the core inserting pile by combining the foam concrete bottom expanding with the upper soil body light solidification according to the claim 1, wherein in the step 1), the diameter of an inner drilling hole is 2-5 times of that of the prefabricated rigid pile, and the hole depth of the inner drilling hole is 3-5 m longer than the insertion length of the prefabricated rigid pile.
3. The method for treating the core inserting pile by combining the foam concrete bottom expanding with the upper soil body light solidification according to claim 1, wherein in the step 1), the hole expanding depth of the bottom of the inner drilling hole is 1-3 m.
4. The method for treating the core inserting pile by combining the expanded foam concrete with the lightweight solidified upper soil body according to claim 1, wherein in the step 2), the pouring height of the foam concrete at the bottom layer is 3-5 m.
5. The method for handling the core inserted pile by combining the expanded foam concrete with the lightweight solidified upper soil body according to claim 1, wherein in the step 3), fibers are doped into the poured solidified foam soil or the upper layer foam concrete.
6. The method for treating the core-inserted pile by combining the expanded foam concrete with the light-weight solidification of the upper soil body according to claim 1, wherein in the step 3), before the foam solidified soil or the upper layer of foam concrete is poured, a geosynthetic sleeve is arranged in the steel sleeve to serve as a circumferential reinforcement structure.
7. The method for treating the core-inserted pile by combining the foam concrete bottom expansion with the light solidification of the upper soil body according to claim 1, wherein in the step 4), the steel sleeve is pulled out by a vibrating hammer of a pile driver, the pulling speed is 0.8-1.8 m/min, and the steel sleeve is pulled out while vibrating.
8. The method for treating the core inserting pile by combining the foam concrete bottom expanding with the upper soil body light solidification according to claim 1, wherein the prefabricated rigid pile is inserted into H below the upper surface of the foam concrete at the bottom layer, and H is 2-3 times of the diameter of the prefabricated rigid pile.
9. The method for processing the core inserted pile by combining the expanded foam concrete with the light upper soil body solidification according to claim 1, which is characterized by further comprising the following steps after the step 4): and finishing construction after the foam concrete and the foam solidified soil are cured and solidified.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110260359.2A CN113026710A (en) | 2021-03-10 | 2021-03-10 | Core inserting pile processing method combining foam concrete bottom expanding with upper soil body light solidification |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110260359.2A CN113026710A (en) | 2021-03-10 | 2021-03-10 | Core inserting pile processing method combining foam concrete bottom expanding with upper soil body light solidification |
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| Publication Number | Publication Date |
|---|---|
| CN113026710A true CN113026710A (en) | 2021-06-25 |
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| CN202110260359.2A Pending CN113026710A (en) | 2021-03-10 | 2021-03-10 | Core inserting pile processing method combining foam concrete bottom expanding with upper soil body light solidification |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104005404A (en) * | 2014-05-16 | 2014-08-27 | 杭州江润科技有限公司 | Prestressed pipe pile coated with active material pile body and construction method |
| CN105200879A (en) * | 2015-10-16 | 2015-12-30 | 北京科技大学 | Water-permeable foam concrete pile compound foundation |
| CN109778826A (en) * | 2019-01-29 | 2019-05-21 | 程桂香 | A kind of construction of soft soil treatment method based on Novel foam concrete |
| DE202019003404U1 (en) * | 2018-12-15 | 2019-08-28 | Reiner Ulbrich | Sound and vibration absorbing foam concrete substructures |
| CN111364453A (en) * | 2020-03-24 | 2020-07-03 | 中交一公局第七工程有限公司 | Method for reinforcing deep soft soil foundation by light cement soil long spiral cast-in-place pile |
-
2021
- 2021-03-10 CN CN202110260359.2A patent/CN113026710A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104005404A (en) * | 2014-05-16 | 2014-08-27 | 杭州江润科技有限公司 | Prestressed pipe pile coated with active material pile body and construction method |
| CN105200879A (en) * | 2015-10-16 | 2015-12-30 | 北京科技大学 | Water-permeable foam concrete pile compound foundation |
| DE202019003404U1 (en) * | 2018-12-15 | 2019-08-28 | Reiner Ulbrich | Sound and vibration absorbing foam concrete substructures |
| CN109778826A (en) * | 2019-01-29 | 2019-05-21 | 程桂香 | A kind of construction of soft soil treatment method based on Novel foam concrete |
| CN111364453A (en) * | 2020-03-24 | 2020-07-03 | 中交一公局第七工程有限公司 | Method for reinforcing deep soft soil foundation by light cement soil long spiral cast-in-place pile |
Non-Patent Citations (1)
| Title |
|---|
| 温定焕: "泡沫混凝土劲性复合桩施工质量控制试验研究", 福建建筑, no. 268, pages 71 - 74 * |
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