CN117468430A - Miniature expansion discrete pile based on solid waste and soft foundation reinforcing method - Google Patents
Miniature expansion discrete pile based on solid waste and soft foundation reinforcing method Download PDFInfo
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- CN117468430A CN117468430A CN202311709711.1A CN202311709711A CN117468430A CN 117468430 A CN117468430 A CN 117468430A CN 202311709711 A CN202311709711 A CN 202311709711A CN 117468430 A CN117468430 A CN 117468430A
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- 239000002910 solid waste Substances 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims abstract description 22
- 230000003014 reinforcing effect Effects 0.000 title claims abstract description 9
- 239000000463 material Substances 0.000 claims abstract description 53
- 239000002689 soil Substances 0.000 claims abstract description 48
- 230000002745 absorbent Effects 0.000 claims abstract description 22
- 239000002250 absorbent Substances 0.000 claims abstract description 22
- 239000011347 resin Substances 0.000 claims abstract description 22
- 229920005989 resin Polymers 0.000 claims abstract description 22
- 239000006185 dispersion Substances 0.000 claims abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000002893 slag Substances 0.000 claims abstract description 13
- 239000002699 waste material Substances 0.000 claims abstract description 11
- 239000002131 composite material Substances 0.000 claims abstract description 9
- 238000010276 construction Methods 0.000 claims abstract description 9
- 238000010521 absorption reaction Methods 0.000 claims abstract description 6
- 238000007711 solidification Methods 0.000 claims abstract description 4
- 230000008023 solidification Effects 0.000 claims abstract description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 9
- 239000010959 steel Substances 0.000 claims description 9
- 238000001125 extrusion Methods 0.000 claims description 7
- 239000002245 particle Substances 0.000 claims description 7
- 230000002787 reinforcement Effects 0.000 claims description 6
- 238000013461 design Methods 0.000 claims description 5
- 239000004568 cement Substances 0.000 claims description 4
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 229910052602 gypsum Inorganic materials 0.000 claims description 3
- 239000010440 gypsum Substances 0.000 claims description 3
- 238000005259 measurement Methods 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- 238000005096 rolling process Methods 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims 1
- 230000008901 benefit Effects 0.000 abstract description 4
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 3
- 239000010410 layer Substances 0.000 description 3
- 238000007596 consolidation process Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000010813 municipal solid waste Substances 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229920000578 graft copolymer Polymers 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- JYLTYGKNPRAOJY-UHFFFAOYSA-N prop-2-enamide;prop-2-enenitrile;prop-2-enoic acid Chemical compound C=CC#N.NC(=O)C=C.OC(=O)C=C JYLTYGKNPRAOJY-UHFFFAOYSA-N 0.000 description 1
- 229920001897 terpolymer Polymers 0.000 description 1
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
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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)
- Piles And Underground Anchors (AREA)
Abstract
A miniature expansion pile and soft foundation reinforcing method comprises solid waste material and super absorbent resin, wherein each 1m of the solid waste material 3 1-10kg of fibrous super absorbent resin is uniformly mixed into the solid waste material in the form of dispersion, and the diameter of a miniature expansion dispersion pile formed after water absorption and solidification is 10cm, and the pile length is 5m. The invention also comprises a soft foundation reinforcing method adopting the micro-expansion discrete body, wherein micro-expansion discrete body pile groups based on solid waste are arranged in the foundation, soil between the micro-expansion discrete body piles is reinforced, the micro-expansion discrete body piles and the soil between the piles form a composite foundation together, and a hard shell layer is formed at the upper part of the foundation and used as a foundation of an upper structure. The formed composite foundation not only reinforces the soil between piles, fully utilizes the strength of soft soil, increases the vertical and horizontal deformation resistance, but also can conveniently obtain the expected ground by adjusting the pile lengthThe pile body of the miniature expansion bulk pile mainly utilizes solid waste materials such as construction waste, slag and the like, and has remarkable environmental protection benefit.
Description
Technical Field
The invention belongs to the field of foundation reinforcement of highways, municipal works and the like, and particularly relates to a miniature expansion discrete pile based on solid waste and a soft foundation reinforcement method.
Background
The foundation of the delta zone near the entrance of large rivers such as Yangtze river, zhujiang river and yellow river is often composed of soft soil with great depth, and the soft soil depth is even more than 50m. The foundation treatment is necessary when constructing roads, buildings and the like on such foundations, but there are many problems when treating such deep soft soil foundations by using the foundation treatment method commonly used at present, such as:
(1) When various end bearing piles such as steel pipe piles and the like are driven in the foundation, the pile body is large in length and high in cost, the contribution of the strength of soft soil to the bearing capacity of the foundation is small, and the resistance of the treated foundation to lateral deformation is low;
(2) When the foundation is reinforced by changing the structure of the soft soil foundation by adopting the methods of dynamic compaction, vacuum preloading, preloading and the like, the influence on surrounding buildings is large, and large settlement deformation can be generated, the influence on the design of an upper building is large in a river mouth delta zone with low elevation and high water level, and a large amount of backfill is needed for being leveled with the surrounding ground;
(3) Post-construction settlement of overhead roads, buildings, etc. tends to be large, and has a great adverse effect on later use.
Micro piles generally refer to piles having a pile diameter of less than 400mm and a slenderness ratio of greater than 30.
Aiming at the defect of the current treatment of the deep soft soil foundation, the applicant designs and develops a miniature expansion discrete pile based on solid waste and a soft foundation reinforcing method.
Disclosure of Invention
Aiming at the problems existing in the prior art, the invention provides a miniature expansion discrete pile based on solid waste and a soft foundation reinforcing method.
The invention is realized in such a way that the solid waste-based miniature expansion discrete pile comprises solid waste materials and fibrous super absorbent resin filled in pile holes, wherein 1-10kg of fibrous super absorbent resin is uniformly mixed into each 1 ton of solid waste materials in a discrete shape, the initial aperture of the pile holes is 10-20cm, the diameter of the miniature expansion discrete pile formed after water absorption and solidification is far greater than the initial aperture, and the pile length is 3-20 m.
Preferably, the maximum particle size of the solid waste material is 1/3 of the diameter.
Preferably, the bulk waste is one or a combination of two or more of construction waste, slag, steel slag and slag.
Preferably, cementing materials can be added, and the weight proportion of the cementing materials is 0-10% of the mass of the solid waste materials.
Preferably, the cementing material is cement or gypsum.
Preferably, the pile holes are arranged in a square shape or a quincuncial shape, and the pile hole distance is 3-5 times of the pile hole diameter. The invention also discloses a soft foundation reinforcing method based on the miniature expansion discrete pile, which comprises the following steps:
s1, surveying a soft soil foundation, knowing physical and mechanical parameters and engineering characteristics related to water content, density, compression modulus, cohesive force, internal friction angle and foundation bearing capacity, and determining the types and the mixing ratio of solid waste materials and the doping amount of fibrous super absorbent resin according to the requirements of the composite foundation bearing capacity and deformation characteristics after the design and reinforcement;
s2, leveling the field and preparing mechanical equipment;
s3, preparing a dispersion material of the miniature expansion dispersion pile, and uniformly mixing the solid waste material and the fibrous super absorbent resin according to the requirement that 1-10kg of fibrous super absorbent resin is uniformly mixed into each 1 ton of solid waste material in a dispersion shape;
s4, determining pile hole point positions of the miniature expansion discrete piles through measurement, wherein pile holes are arranged in a square shape or a quincuncial shape, and the pile hole distance is 3-5 times of the pile hole diameter;
s5, pile holes are drilled in the foundation: the pore-forming equipment is used for forming a sleeve and a pile shoe with a valve by adopting a vibration pore-forming or impact pore-forming mode, wherein the valve is closed when the pile shoe sinks and is opened when the pile shoe lifts, the pile shoe valve is in a closed state in the pore-forming process, the soil between piles is extruded and vibrated in the pore-forming process, water in the soil between piles is easily discharged, and the soil between piles is reinforced by extrusion and drainage;
s6, when the pile shoe is sunk into the designed depth, penetrating the mixed discrete materials in the step 3 into a cavity in the steel sleeve, lifting the pile shoe, wherein the valve is in an open state, lifting 0.5m each time, naturally sliding the discrete materials into the hole, sinking the pile shoe again, compacting the discrete materials, and pressing the discrete materials into pile-to-pile soil, wherein the actual pile diameter can be far greater than the designed pile diameter, and the pile-to-pile soil is further reinforced;
s7, repeating the operation of the step S6 until all the miniature expansion bulk piles are completely driven;
and S8, monitoring the site bearing capacity and deformation parameters, leveling the site after the deformation parameters are basically unchanged, and performing vibration rolling to finish foundation treatment.
The invention has the advantages and technical effects that: the invention is to set up miniature expansion dispersion pile group based on solid waste in the foundation, consolidate the soil between piles among miniature expansion dispersion, the miniature expansion dispersion pile and soil between piles form the composite foundation together, form the crust layer on the upper portion of foundation, as the foundation of the superstructure. The formed composite foundation not only reinforces soil among piles, fully utilizes the strength of soft soil, increases vertical and horizontal deformation resistance, but also can conveniently obtain expected post-construction settlement of the foundation by adjusting pile length, and the miniature expansion discrete pile body mainly utilizes solid waste materials such as construction waste, slag, steel slag, slag and the like, thereby having remarkable environmental protection benefit.
Drawings
FIG. 1 is a schematic diagram of the distribution of the expanded discrete pile according to the present invention;
fig. 2 is a state diagram of the expanded discrete pile in a soft foundation.
In the figure, 1, miniature expansion discrete piles; 2. soil between piles.
Detailed Description
The present invention will be described in further detail with reference to the following examples in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Referring to fig. 1 and 2, a solid waste based micro-expansion discrete pile comprises solid waste material and fibrous super absorbent resin filled in pile holes, wherein 1-10kg of fibrous super absorbent resin is uniformly mixed into 1 ton of solid waste material in a discrete shape, the initial aperture of the pile holes is 10-20cm, the pile diameter of the micro-expansion discrete pile formed after water absorption and solidification is larger than the initial aperture, and the pile length is 3-20 m.
Preferably, the maximum grain diameter of the solid waste material is 1/3 of the shape diameter, so that the solid waste material can smoothly slide into the pile bottom through the cavity of the pore-forming equipment.
Preferably, the bulk waste is one or the combination of two or more of construction waste, slag, steel slag and slag, the solid waste material has certain strength, and the materials are relatively easy to obtain, so that the waste is reused.
Preferably, cementing materials such as cement, gypsum and the like can be added, and the weight proportion of the addition is 0-10% of that of the solid waste materials.
The invention also discloses a soft foundation reinforcing method based on the miniature expansion discrete pile, which is characterized by comprising the following steps of: the method comprises the following steps:
s1, surveying a soft soil foundation, knowing physical and mechanical parameters and engineering characteristics related to water content, density, compression modulus, cohesive force, internal friction angle and foundation bearing capacity, and determining the types and the mixing ratio of solid waste materials and the doping amount of super absorbent resin according to the requirements of the composite foundation bearing capacity and deformation characteristics after the design and reinforcement;
s2, leveling the field and preparing mechanical equipment;
s3, preparing a dispersion material of the miniature expansion dispersion pile, and uniformly mixing the solid waste material and the fibrous super absorbent resin according to the requirement that 1-10kg of fibrous super absorbent resin is uniformly mixed into each 1 ton of solid waste material in a dispersion shape;
s4, determining pile hole point positions of the miniature expansion discrete piles through measurement, wherein pile holes are arranged in a square shape or a quincuncial shape, and the pile hole distance is 3-5 times of the pile hole diameter;
s5, pile holes are drilled in the foundation: the pore-forming equipment is applied to a steel sleeve and a pile shoe with a valve, the valve is closed when the pile shoe sinks, the valve is opened when the pile shoe lifts, the pore-forming mode can adopt vibration pore-forming or impact pore-forming, the initial pore diameter is 10-20cm, the pile shoe valve is in a closed state in the pore-forming process, extrusion and vibration of soil between piles are carried out in the pore-forming process, water in the soil between piles is easy to drain, and the soil between piles is reinforced by extrusion and drainage;
s6, when the pile shoe is sunk into the designed depth, penetrating the mixed discrete materials in the step 3 into a cavity in the steel sleeve, lifting the pile shoe, wherein the valve is in an open state, lifting 0.5m each time, naturally sliding the discrete materials into the hole, sinking the pile shoe again, compacting the discrete materials, and pressing the discrete materials into pile-to-pile soil, wherein the actual pile diameter can be far greater than the designed pile diameter, and the pile-to-pile soil is further reinforced;
s7, repeating the operation of the step S6 until all the miniature expansion bulk piles are completely driven;
and S8, monitoring the site bearing capacity and deformation parameters, leveling the site after the deformation parameters are basically unchanged, and performing vibration rolling to finish foundation treatment.
The working principle part is as follows:
the technology of the invention is mainly characterized in that a miniature expansion discrete pile composed of solid waste, super absorbent resin and other materials is arranged on the surface layer of the soft soil foundation, and a composite foundation is composed of soil among piles and miniature expansion discrete piles.
The soil between piles is reinforced by various functions, and the concrete analysis is as follows:
1. extrusion of soil between piles in the pile shoe sinking process;
2. vibration in the pile shoe sinking process promotes water in soil among piles to be discharged, and the soil among piles is subjected to drainage consolidation;
3. the diameter of the final discrete pile can be far larger than the diameter of the pile shoe, and the large extrusion effect is generated on soil between piles;
4. after the piles are formed, the super absorbent resin absorbs a large amount of water of soil between the piles, and then swells, and the soil between the piles is subjected to drainage consolidation and extrusion simultaneously.
5. The super absorbent resin fills the gaps among the discrete materials after absorbing water and expanding, so that the strength of the discrete pile can be increased.
In summary, the micro-expansion discrete piles and the soil between piles form a composite foundation together, so that the surface layer of the deep soft soil foundation is reinforced, and a 'hard shell' foundation meeting the requirements of roads, buildings and the like is formed.
Application example 1:
a highway is built on a 20m deep impact silt soil layer, a foundation is reinforced by utilizing a miniature expansion discrete pile, holes are drilled in the foundation, the initial aperture is 10cm, the hole depth is 5m, the square arrangement is carried out, the hole spacing is 40cm, the holes are filled with construction waste crushed particles, the maximum particle diameter of the particles is 3cm, 5kg of starch-acrylonitrile graft copolymer fibrous super absorbent resin is uniformly mixed in each ton of construction waste, the average diameter of the formed pile can reach 20cm, the diameter of the pile is further increased after water absorption expansion, and the soil intensity between piles is further increased.
Application example 2:
building is built on a 40m deep impact silt soil layer, foundation reinforcement is carried out by utilizing miniature expansion discrete piles, holes are drilled in the foundation, the initial aperture is 20cm, the hole depth is 15m, quincuncial arrangement is carried out, the hole spacing is 70cm, 1:1 building rubbish is filled in the holes, the maximum particle diameter of the particles is 6cm, 8kg of acrylamide-acrylonitrile-acrylic acid terpolymer fibrous super absorbent resin and 100kg of cement paste are uniformly mixed in each ton of building rubbish, the average diameter of the formed piles can reach 30cm, the diameter of the piles is further increased after water absorption expansion, and the intensity of soil between the piles is further increased.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (7)
1. The utility model provides a miniature inflation bulk pile based on solid useless which characterized in that: the pile hole is filled with solid waste materials and fibrous super absorbent resin, 1-10kg of fibrous super absorbent resin is uniformly mixed into 1 ton of solid waste materials in a dispersion shape, the initial aperture of the pile hole is 10-20cm, the pile diameter of a miniature expansion dispersion pile formed after water absorption and solidification is larger than the initial aperture, and the pile length is 3-20 m.
2. A miniature expanded granular pile according to claim 1, characterised in that: the maximum particle size of the solid waste material is 1/3 of the shape diameter.
3. A miniature expanded granular pile according to claim 1, characterised in that: the bulk waste is one or the combination of two or more of construction waste, slag, steel slag and slag.
4. A miniature expanded granular pile according to claim 1, characterised in that: and cementing materials can be added, wherein the weight proportion of the cementing materials is 0-10% of the mass of the solid waste materials.
5. The miniature expanded granular piles of claim 4, wherein: the cementing material is cement or gypsum.
6. A miniature expanded granular pile according to claim 1, characterised in that: the pile holes are arranged in a square shape or a quincuncial shape, and the pile hole distance is 3-5 times of the pile hole diameter.
7. The soft foundation reinforcing method based on the miniature expansion discrete pile is characterized by comprising the following steps of: the method comprises the following steps:
s1, surveying a soft soil foundation, knowing physical and mechanical parameters and engineering characteristics related to water content, density, compression modulus, cohesive force, internal friction angle and foundation bearing capacity, and determining the types and the mixing ratio of solid waste materials and the doping amount of fibrous super absorbent resin according to the requirements of the composite foundation bearing capacity and deformation characteristics after the design and reinforcement;
s2, leveling the field and preparing mechanical equipment;
s3, preparing a dispersion material of the miniature expansion dispersion pile, and uniformly mixing the solid waste material and the fibrous super absorbent resin according to the requirement that 1-10kg of fibrous super absorbent resin is uniformly mixed into each 1 ton of solid waste material in a dispersion shape;
s4, determining pile hole point positions of the miniature expansion discrete piles through measurement, wherein pile holes are arranged in a square shape or a quincuncial shape, and the pile hole distance is 3-5 times of the pile hole diameter;
s5, pile holes are drilled in the foundation: the pore-forming equipment is used for forming a sleeve and a pile shoe with a valve by adopting a vibration pore-forming or impact pore-forming mode, wherein the valve is closed when the pile shoe sinks and is opened when the pile shoe lifts, the pile shoe valve is in a closed state in the pore-forming process, the soil between piles is extruded and vibrated in the pore-forming process, water in the soil between piles is easily discharged, and the soil between piles is reinforced by extrusion and drainage;
s6, when the pile shoe is sunk into the designed depth, penetrating the mixed discrete materials in the step 3 into a cavity in the steel sleeve, lifting the pile shoe, wherein the valve is in an open state, lifting 0.5m each time, naturally sliding the discrete materials into the hole, sinking the pile shoe again, compacting the discrete materials, and pressing the discrete materials into soil between piles, wherein the actual diameter of the piles can be far larger than the initial diameter of the piles, and the soil between piles is further reinforced;
s7, repeating the operation of the step S6 until all the miniature expansion bulk piles are completely driven;
and S8, monitoring the site bearing capacity and deformation parameters, leveling the site after the deformation parameters are basically unchanged, and performing vibration rolling to finish foundation treatment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311709711.1A CN117468430A (en) | 2023-12-13 | 2023-12-13 | Miniature expansion discrete pile based on solid waste and soft foundation reinforcing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311709711.1A CN117468430A (en) | 2023-12-13 | 2023-12-13 | Miniature expansion discrete pile based on solid waste and soft foundation reinforcing method |
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| Publication Number | Publication Date |
|---|---|
| CN117468430A true CN117468430A (en) | 2024-01-30 |
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ID=89631439
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311709711.1A Pending CN117468430A (en) | 2023-12-13 | 2023-12-13 | Miniature expansion discrete pile based on solid waste and soft foundation reinforcing method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117468430A (en) |
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2023
- 2023-12-13 CN CN202311709711.1A patent/CN117468430A/en active Pending
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