CN111962545A - Soft foundation treatment method for compaction foundation soil with FRP (fiber reinforced plastic) wood piles stuck inside - Google Patents
Soft foundation treatment method for compaction foundation soil with FRP (fiber reinforced plastic) wood piles stuck inside Download PDFInfo
- Publication number
- CN111962545A CN111962545A CN202010797073.3A CN202010797073A CN111962545A CN 111962545 A CN111962545 A CN 111962545A CN 202010797073 A CN202010797073 A CN 202010797073A CN 111962545 A CN111962545 A CN 111962545A
- Authority
- CN
- China
- Prior art keywords
- foundation
- frp
- soil
- compacted
- wood
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
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
- E02D27/14—Pile framings, i.e. piles assembled to form the substructure
-
- 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
- E02D5/24—Prefabricated piles
- E02D5/26—Prefabricated piles made of timber with or without reinforcement; Means affording protection against spoiling of the wood; Self-cleaning of piles placed in water
-
- 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
- E02D5/54—Piles with prefabricated supports or anchoring parts; Anchoring piles
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/0046—Production methods using prestressing techniques
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2600/00—Miscellaneous
- E02D2600/30—Miscellaneous comprising anchoring details
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)
- Wood Science & Technology (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention discloses a soft foundation treatment method of foundation soil with an FRP (fiber reinforce Plastic) wood pile compacted inside, which comprises the following steps of S1, driving a section of compacted wood piles with a length in parallel at intervals on the soft foundation during operation to improve the compactness of a soil layer where the compacted wood piles are positioned, S2, pouring a rubble concrete slab at the top end of the compacted wood piles to fix the top end of the compacted wood piles, maintaining the vertical state of the compacted wood piles, and sticking an FRP layer subjected to pretension to a panel on the top of the rubble concrete slab. The invention is suitable for the foundation treatment schemes of various high-compressibility soils such as mucky soil, filling soil, miscellaneous filling soil, soil containing construction waste, soil containing domestic waste, collapsible loess, liquefied soil and the like, and has the advantages of high strength, high efficiency, convenient construction, wide application range, high foundation bearing capacity, control of the crack width of a foundation bottom plate, improvement of fatigue life, reduction of material plastic creep, reduction of foundation deflection, reduction of foundation differential settlement and excellent economic performance.
Description
Technical Field
The invention relates to the technical field of building foundation construction, in particular to a method for treating a soft foundation of a compaction foundation soil with an FRP (fiber reinforced plastic) wooden pile stuck inside.
Background
In actual engineering, a plurality of soft foundations can appear, mucky soil and garbage soil are common, the bearing capacity of the foundation is low, uneven settlement is easy to occur, a shallow foundation cannot be used, the upper structure is simple, cost is wasted if concrete filling piles or steel pipe piles are used, the manufacturing cost is increased, the foundation soil is compacted by fir piles, the compactness of soil in a certain range is improved, and the fir piles are fixed by rubble concrete slabs, so that the bearing capacity of the foundation soil is improved. In addition, the FRP has excellent physical and mechanical properties, good adhesion and corrosion resistance, and the advantages are more obvious when the FRP is applied to a base structure.
Based on the existing foundation slab with large upper load, uneven settlement is easy to occur, and the strength and the rigidity can not meet the conditions, so that the novel FRP is adopted to enhance the strength and the rigidity of the rubble concrete slab, and the wood columns are combined to extrude the foundation soil tightly, so that the bearing capacity of the composite foundation is improved, and the method with more obvious enhancement effect is used for optimizing the existing problems.
Disclosure of Invention
Based on the technical problems in the background art, the invention provides a method for treating a soft foundation of a foundation soil with an internally adhered FRP (fiber reinforced plastic) timber pile.
The invention provides a method for treating a soft foundation of a foundation soil with an internal FRP (fiber reinforced plastic) timber pile compacted, which comprises the following steps of:
s1: when in operation, firstly, a section of length of compacted timber piles are driven into the soft foundation in parallel at intervals, so that the compactness of the soil layer where the compacted timber piles are located is improved;
s2: then pouring a rubble concrete slab on the top end of the compaction wood pile to fix the top end of the compaction wood pile, maintaining the vertical state of the compaction wood pile, and sticking an FRP layer subjected to pretension to a top panel of the rubble concrete slab;
s3: the method for applying the pre-tensioned FRP layer comprises the steps of firstly tensioning an FRP panel, then adhering the whole FRP panel to the top of a rubble concrete slab, or firstly applying load to enable an upper structure to generate reverse camber, then adhering the FRP panel to the top, then releasing the load to enable the FRP to generate pre-tension, then performing staggered adhesion through FRP belts, performing diagonal opposite-pulling adhesion and axial vertical adhesion, and keeping the high pre-tension;
s4: and finally, covering the FRP layer with plain concrete to enable the wooden piles, the rubble concrete plates and the FRP layer to form a whole to serve as a composite foundation to bear the upper load of the foundation slab.
As a further scheme of the invention, the compaction wood pile comprises expanding rods, a pile body and inserting expansion cavities, wherein the expanding rods are annularly distributed on the outer walls of four sides of the middle part of the pile body at equal intervals, and the inserting expansion cavities are positioned on the central axis of the inner wall of the pile body.
As a further scheme of the invention, the inner wall of the compacted timber pile is fixedly connected with an anchor rod assembly through the inserting expansion cavity, and the outer wall of the bottom end of the anchor rod assembly is clamped between the inner walls of the expansion rods on the four sides.
As a further scheme of the invention, a wrapping belt is arranged between the bottom ends of the FRP belts, and the inner wall of the wrapping belt is fixedly connected to the outer wall of the top end of the anchor rod assembly.
As a further aspect of the present invention, the FRP layer is composed of at least one material selected from BFRP, GFRP and CFRP.
As a further scheme of the present invention, the compacted timber pile is any one of a round timber column, a square timber column and a multi-edge vertical cylindrical structure, and the compacted timber pile is made of a high-strength material.
As a further scheme of the invention, a foundation slab is arranged on the outer wall of the top of the plain concrete layer, and the structure of the foundation slab is any one of a strip foundation and a raft foundation.
The beneficial effects of the invention are as follows:
1. the treatment method can improve the bearing capacity, is particularly suitable for soft foundation soil such as mucky soil, miscellaneous filling soil, collapsible loess, domestic waste soil and the like, has excellent stress performance, and is particularly suitable for the conditions of large compressive load, high size requirement, limited plate thickness and the like;
2. the treatment method is suitable for the prestressed FRP reinforced rubble concrete slab, and the wood columns are combined to extrude foundation soil densely, so that the bearing capacity of the composite foundation is improved, the rigidity of the foundation is greatly improved, the uneven settlement of the foundation is reduced, and the service life of a building or a structure is prolonged;
3. the treatment method adopts a foundation treatment scheme that the pile body squeezes foundation soil, the middle part of the pile body is opened to form a structure, surrounding soil can be stably squeezed, meanwhile, the anchor rod assembly can be connected with the pile body, the top soil plate and the concrete structure to form a stable T-shaped structure, and the treatment method has high cost performance and obvious effect when being used for treating soft foundations.
In conclusion, the method is a foundation treatment scheme suitable for various high-compressibility soils such as mucky soil, filling soil, miscellaneous filling soil, construction waste containing soil, domestic waste containing soil, collapsible loess, liquefied soil and the like, and has the advantages of high strength, high efficiency, convenience and quickness in construction, wide application range, high foundation bearing capacity, control of crack width of a foundation bottom plate, improvement of fatigue life, reduction of plastic creep of materials, reduction of foundation deflection, reduction of uneven settlement of the foundation and excellent economic performance.
Drawings
FIG. 1 is a schematic view of a construction structure of a soft foundation treatment method of a foundation soil compacted with FRP timber piles stuck inside according to the present invention;
FIG. 2 is a schematic view of a compacted wood pile structure of the method for treating a soft foundation of a compacted foundation soil with an FRP wood pile stuck inside according to the present invention;
FIG. 3 is a schematic view of a FRP layer treatment structure of the method for treating a weak foundation of a foundation soil compacted with FRP timber piles stuck inside according to the present invention.
In the figure: 1 compaction timber pile, 2 rubble concrete slab, 3 FRP layer, 4 tie layers, 5 plain concrete layers, 6 anchor rod components, 7 opening rods, 8 pile bodies, 9 inserting and expanding cavities, 10FRP belt, 11FRP panel and 12 winding and connecting belt.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Referring to fig. 1-3, a method for treating a soft foundation of a foundation soil with an FRP timber pile inside, which comprises the following steps:
s1: during operation, firstly, a section of length of compacted timber piles 1 are driven into the soft foundation in parallel at intervals, so that the compactness of the soil layer where the compacted timber piles 1 are located is improved;
s2: then pouring a rubble concrete slab 2 at the top end of the compaction wood pile 1 to fix the top end of the compaction wood pile 1, maintaining the vertical state of the compaction wood pile, and sticking an FRP layer 3 subjected to pretension to a top panel of the rubble concrete slab 2;
s3: the method for applying the pre-tensioned FRP layer 3 comprises the steps of firstly tensioning an FRP panel 11, then adhering the whole FRP panel 11 to the top of a rubble concrete slab 2, or firstly applying load to enable an upper structure to generate reverse camber, then adhering the FRP panel 11 to the top, then releasing the load to enable FRP to generate pretension, then performing staggered adhesion through FRP belts 10, performing diagonal opposite-pulling adhesion and axial vertical adhesion, and keeping the higher pretension;
s4: and finally, covering the FRP layer 3 with plain concrete 5 to enable the wooden piles, the rubble concrete plate 2 and the FRP layer 3 to form a whole to serve as a composite foundation to bear the upper load of the foundation slab.
In the invention, an extruded and compacted wood pile 1 comprises an expanding rod 7, a pile body 8 and an inserting and expanding cavity 9, wherein the expanding rod 7 is annularly distributed on the outer walls of four sides of the middle part of the pile body 8 at equal intervals, the inserting and expanding cavity 9 is positioned at the central axis of the inner wall of the pile body 8, the inner wall of the extruded and compacted wood pile 1 is fixedly connected with an anchor rod assembly 6 through the inserting and expanding cavity 9, the outer wall of the bottom end of the anchor rod assembly 6 is clamped between the inner walls of the expanding rods 7 of the four sides, a winding strip 12 is arranged between the bottom ends of FRP strips 10, and the inner wall of the winding strip 12 is fixedly connected on the outer wall of the;
the FRP layer 3 is composed of at least one material of BFRP, GFRP and CFRP, the BFRP is glass fiber reinforced composite material, the GFRP is basalt fiber reinforced composite material, the CFRP is carbon fiber reinforced composite material, the thickness of the FRP layer 3 is 1-3mm, the rubble concrete slab 2 is formed by pouring C20 concrete into a Mu30 rubble concrete slab, and the proportion of the rubble to the concrete is 4: 6, the compaction timber pile 1 is any one of round timber column, square timber column and the perpendicular tubular structure of many arriss, and the compaction timber pile 1 is made for high strength material, and the top outer wall of plain concrete layer 5 is equipped with the soleplate, and the structure of soleplate is any one of bar foundation and raft foundation.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (7)
1. A soft foundation treatment method for compaction foundation soil with FRP timber piles stuck inside is characterized by comprising the following steps:
s1: during operation, firstly, a section of length of compacted wooden piles (1) are driven into the soft foundation in parallel at intervals, so that the compactness of a soil layer where the compacted wooden piles (1) are located is improved;
s2: then pouring a rubble concrete slab (2) at the top end of the compaction wood pile (1) to fix the top end of the compaction wood pile (1) and maintain the vertical state of the compaction wood pile, and sticking an FRP (fiber reinforce plastic) layer (3) subjected to pretension to a top panel of the rubble concrete slab (2);
s3: the method for applying the pre-tensioned FRP layer (3) comprises the steps of firstly tensioning an FRP panel (11), then integrally sticking the FRP panel (11) to the upper part of the rubble concrete slab (2), or firstly applying load to enable an upper structure to generate reverse camber, then sticking the FRP panel (11) to the upper part, then releasing the load to enable FRP to generate pretension, then performing staggered bonding through FRP belts (10), performing diagonal opposite-pulling bonding and axial vertical bonding, and keeping high pretension;
s4: and finally, covering the FRP layer (3) with plain concrete (5) to enable the wooden piles, the rubble concrete plate (2) and the FRP layer (3) to form a whole to serve as a composite foundation and bear the upper load of the foundation slab.
2. The method for treating the soft foundation of the foundation soil for the internally-adhered FRP wood pile compaction ground according to claim 1, wherein the compaction wood pile (1) comprises an expanding rod (7), a pile body (8) and an inserting and expanding cavity (9), the expanding rod (7) is annularly distributed on the outer walls of the four sides of the middle part of the pile body (8) at equal intervals, and the inserting and expanding cavity (9) is positioned at the central axis of the inner wall of the pile body (8).
3. The method for treating the soft foundation of the foundation soil for the internally-adhered FRP wood pile compaction foundation soil according to claim 2, wherein the inner wall of the compaction wood pile (1) is fixedly connected with the anchor rod assembly (6) through the inserting expansion cavity (9), and the outer wall of the bottom end of the anchor rod assembly (6) is clamped between the inner walls of the expansion rods (7) at the four sides.
4. The method for treating the soft foundation of the foundation soil with the FRP wood piles compacted inside according to claim 1, wherein a wrapping belt (12) is arranged between the bottom ends of the FRP belts (10), and the inner wall of the wrapping belt (12) is fixedly connected to the outer wall of the top end of the anchor rod assembly (6).
5. The method for treating a weak foundation of a foundation soil compacted with FRP stakes attached inside according to claim 2, wherein the FRP layer (3) is made of at least one material selected from BFRP, GFRP and CFRP.
6. The method for treating the soft foundation of the foundation soil with the FRP wood piles compacted inside according to claim 1, wherein the compacted wood piles (1) are any one of round wood columns, square wood columns and multi-edge vertical cylindrical structures, and the compacted wood piles (1) are made of high-strength materials.
7. The method for treating the soft foundation of the foundation soil with the internally adhered FRP wood piles compacted, according to claim 1, wherein a foundation slab is arranged on the outer wall of the top of the plain concrete layer (5), and the foundation slab is in any one of a strip foundation and a raft foundation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010797073.3A CN111962545A (en) | 2020-08-10 | 2020-08-10 | Soft foundation treatment method for compaction foundation soil with FRP (fiber reinforced plastic) wood piles stuck inside |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010797073.3A CN111962545A (en) | 2020-08-10 | 2020-08-10 | Soft foundation treatment method for compaction foundation soil with FRP (fiber reinforced plastic) wood piles stuck inside |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111962545A true CN111962545A (en) | 2020-11-20 |
Family
ID=73364226
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010797073.3A Pending CN111962545A (en) | 2020-08-10 | 2020-08-10 | Soft foundation treatment method for compaction foundation soil with FRP (fiber reinforced plastic) wood piles stuck inside |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111962545A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112854290A (en) * | 2021-01-15 | 2021-05-28 | 宁波市电力设计院有限公司 | Construction method for reinforcing transformer substation equipment foundation |
| CN114411679A (en) * | 2022-02-09 | 2022-04-29 | 新疆兵团勘测设计院(集团)有限责任公司 | Deep silt foundation treatment device and method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205116204U (en) * | 2015-09-29 | 2016-03-30 | 中铁第四勘察设计院集团有限公司 | Roadbed structure of crowded native bored concrete pile stake board of two -way spiral |
| CN106382017A (en) * | 2016-11-18 | 2017-02-08 | 南京工业大学 | Externally bonded pre-tensioned FRP (Fiber Reinforced Plastic) reinforcement beam and plate or combined structure thereof |
| JP2018084048A (en) * | 2016-11-22 | 2018-05-31 | 新日鐵住金株式会社 | Steel pipe pile, pile head structure, pile type construction, construction method for steel pipe pile, and construction method for pile type construction |
| CN208105234U (en) * | 2018-04-23 | 2018-11-16 | 盐城工业职业技术学院 | Reinforced soft soil ground pipe and reinforcement of foundation |
-
2020
- 2020-08-10 CN CN202010797073.3A patent/CN111962545A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205116204U (en) * | 2015-09-29 | 2016-03-30 | 中铁第四勘察设计院集团有限公司 | Roadbed structure of crowded native bored concrete pile stake board of two -way spiral |
| CN106382017A (en) * | 2016-11-18 | 2017-02-08 | 南京工业大学 | Externally bonded pre-tensioned FRP (Fiber Reinforced Plastic) reinforcement beam and plate or combined structure thereof |
| JP2018084048A (en) * | 2016-11-22 | 2018-05-31 | 新日鐵住金株式会社 | Steel pipe pile, pile head structure, pile type construction, construction method for steel pipe pile, and construction method for pile type construction |
| CN208105234U (en) * | 2018-04-23 | 2018-11-16 | 盐城工业职业技术学院 | Reinforced soft soil ground pipe and reinforcement of foundation |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112854290A (en) * | 2021-01-15 | 2021-05-28 | 宁波市电力设计院有限公司 | Construction method for reinforcing transformer substation equipment foundation |
| CN114411679A (en) * | 2022-02-09 | 2022-04-29 | 新疆兵团勘测设计院(集团)有限责任公司 | Deep silt foundation treatment device and method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20210032819A1 (en) | A precast segmental pier reinforced with both conventional steel bars and high-strength steel bars | |
| CN100577923C (en) | Prestressed concrete steel pipe congruent pile and its manufacture and construction method | |
| CN111962545A (en) | Soft foundation treatment method for compaction foundation soil with FRP (fiber reinforced plastic) wood piles stuck inside | |
| CN208533868U (en) | A kind of novel arrangement of reinforcement hollow steel pipe high-strength concrete column | |
| CN101761089B (en) | Fiber reinforced concrete uplift pile | |
| Wang et al. | Seismic behaviors and resilient capacity of CFRP-confined concrete columns with partially debonded high-strength steel rebars | |
| CN201330395Y (en) | Pretensioning prestressed concrete hollow shaped square pile | |
| CN211142788U (en) | Semi-assembled combined pier | |
| CN208136920U (en) | A kind of triangle prestressing force foundation pit supporting pile and its connection structure | |
| CN2313959Y (en) | Cement-soil hard cored composite pile for fountain | |
| CN108330988B (en) | Polygonal foundation pit supporting structure and construction method | |
| US20080181729A1 (en) | Deep Foundation Construction Bracket and System | |
| CN108590037A (en) | A kind of novel arrangement of reinforcement hollow steel pipe high-strength concrete column | |
| CN112575891B (en) | Low-seismic-loss beam column node based on waveform BFRP connecting plate | |
| CN108374422A (en) | A kind of triangle prestressing force foundation pit supporting pile and its connection structure | |
| CN210195317U (en) | Reinforced structure of rectangular cross-section axial pressurized reinforced concrete column | |
| CN208072396U (en) | A kind of hybrid reinforcement prestressing force support pile group | |
| CN216892443U (en) | Post-tensioning method prestressed mini-pile foundation pit supporting structure | |
| RU76028U1 (en) | FENCING GEOTECHNICAL REINFORCED CONCRETE ELEMENT | |
| CN108301407B (en) | Mixed reinforcement prestress support pile group and construction method | |
| CN217710687U (en) | Pre-tensioning method prestressed concrete hollow precast pile | |
| US20130340365A1 (en) | Tetrahedral Tube Reinforcement of Concrete | |
| CN209741830U (en) | Deconstructed finite element assembled prestressed pile suitable for pile bottom hammering pile sinking | |
| CN219568941U (en) | Assembled stiffness composite expansion pile | |
| CN216551908U (en) | Solid precast pile connection structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20201120 |