CN101392527B - Method for processing soft foundation by earthwork fabric granular pile - Google Patents

Method for processing soft foundation by earthwork fabric granular pile Download PDF

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Publication number
CN101392527B
CN101392527B CN200810197321XA CN200810197321A CN101392527B CN 101392527 B CN101392527 B CN 101392527B CN 200810197321X A CN200810197321X A CN 200810197321XA CN 200810197321 A CN200810197321 A CN 200810197321A CN 101392527 B CN101392527 B CN 101392527B
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China
Prior art keywords
steel sleeve
sleeve pipe
pipe
geotextile
pile
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CN200810197321XA
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Chinese (zh)
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CN101392527A (en
Inventor
冯守中
闫澍旺
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冯守中
闫澍旺
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Priority to CN200810197321XA priority Critical patent/CN101392527B/en
Publication of CN101392527A publication Critical patent/CN101392527A/en
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Publication of CN101392527B publication Critical patent/CN101392527B/en

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Abstract

The invention belongs to the field of civil engineering construction, and particularly relates to a method for reinforcing soft foundation. A method for treating soft foundation with civil engineering fabric discrete material piles is characterized by comprising the following steps: 1) preparing civil engineering fabric pile cylinders and pile pipes; 2) hitting outer steel sleeves to a designed depth by a pile hammer; 3) sleeving the civil engineering fabric pile cylinders on the lower parts of inner steel sleeves and the civil engineering fabric pile cylinders into pipe holes of the outer steel sleeves; 4) pouring discrete material into pipe holes of the inner steel sleeves to form the discrete material piles; 5) hoisting the outer steel sleeves which lift the inner steel sleeves from soft foundation, with the civil engineering fabric pile cylinders and the discrete material piles staying at original places under the action of gravity and the civil engineering fabric pile cylinders wrapping the discrete material piles to form the civil engineering fabric discrete material piles, and then pulling the inner steel sleeves out of the outer steel sleeves and preparing for the next cycle; 6) repeating the step 2) to 5) till the end of the soft foundation treatment. The method has excellent reinforcement effect.

Description

The method of processing soft foundation by earthwork fabric granular pile
Technical field
The invention belongs to the civil engineering construction field, be specifically related to a kind of method of soft base being carried out consolidation process.
Background technology
In civil engineering construction, soft base general reference soft foundation and soft soil foundation.Soft base has bigger harmfulness, and it can cause in various degree destruction to structure, and severe patient not only influences use, even causes thoroughly scrapping of building.From ancient times to the present, many buildings are destroyed, and most reasons are not at building itself, the soft often base of zombie.
Treatment of soft foundation utilize exactly change fill out, the whole bag of tricks such as fixed, compacted, pile foundation load, the weak foundation soil that bearing capacity is not reached requirement is reinforced.The main purpose of treatment of soft foundation is: improve the shear strength of ground, guarantee the stability of ground; Reduce the compressibilty of unfavorable foundation, reduce sedimentation, the especially differential settlement on basis; Prevent that ground is subjected to vibration and makes time spent generation liquefaction phenomenon, improve the dynamic characteristics of ground.
Granular pile is meant that discrete materials such as adopting rubble, gravel, copper smelter slag or building waste carries out ground as pile body and handles, and it handles the advantage of soft base: the one, have the effect that part is replaced weak soil; The 2nd, loose ground is had compacted effect; The 3rd, because of discrete material can form drainage channel, it has the discharging consolidation effect to soft subgrade soil.
But engineering practice proof granular pile is handled soft base and is had certain limitation, the radial constraint power that the need of work of granular pile is certain, if foundation soil strength is low excessively, enough radial constraint power just can not be provided, at this moment one is that the pile body construction time may occur caving in can not the moulding phenomenon, or promptly enable the pile type but lateral deformation takes place when stressed to destroy, thereby do not reach the purpose of consolidated subsoil in work.
Geotextiles or geo-grid claim geotextile again, and geotextiles generally forms (for water permeability geotechnique material) by macromolecular materials such as fibers by acupuncture or braiding.Geotextiles has advantages such as outstanding filtration, isolation, reinforcement protection effect, tensile strength height, good penetrability.
Summary of the invention
The object of the present invention is to provide a kind of method of processing soft foundation by earthwork fabric granular pile, this method consolidation effect is good.
To achieve these goals, technical scheme of the present invention is: the method for processing soft foundation by earthwork fabric granular pile is characterized in that it comprises the steps:
1) preparation of geotextile stake tube and stake pipe: the 1. preparation of geotextile stake tube: be processed into tubular with geotextile, obtain geotextile stake tube;
2. the preparation of stake pipe: the stake pipe is made up of outer steel sleeve pipe and interior steel sleeve; The pore footpath of outer steel sleeve pipe is greater than the external diameter of interior steel sleeve, and when interior steel sleeve inserted the outer steel sleeve pipe, the gap that interior steel sleeve and outer steel sleeve pipe bottom form was for placing the space of geotextile stake tube;
2) by pile hammer with the outer steel sleeve pipe projected depth of driving piles;
3) remove pile hammer from the outer steel sleeve pipe, interior steel sleeve is sling, geotextile stake jacket casing in the bottom of interior steel sleeve, is inserted interior steel sleeve and geotextile stake tube in the pore of outer steel sleeve pipe then together;
4) inwardly irritate discrete material in the pore of steel sleeve, form granular pile;
5) the outer steel sleeve pipe is played rising, steel sleeve rose together and leaves soft base in the outer steel sleeve pipe racks was moving; Geotextile stake tube and granular pile are stayed original position under the weight effect, geotextile stake tube parcel granular pile forms the geotextile granular pile; In the outer steel sleeve pipe, extract interior steel sleeve then, prepare next circulation;
6) from multiple step 2)-5), dispose to reinforcing soft foundation.
The invention has the beneficial effects as follows: adopt granular pile overcoat geotextile stake tube to form the geotextile granular pile, geotextile stake tube plays the effect of radial constraint in the geotextile granular pile to granular pile (being made of discrete material).So both can guarantee foundation soil strength than the situation at the end under geotextile granular pile construction the phenomenon of caving in of discrete material can not appear, geotextile granular pile (being pile foundation) can play the effect of load again simultaneously, thereby consolidation effect good (having stopped the defective of existing granular pile fully), and further improved the Measures for Making Ground and Foundation work efficiency.The present invention says that from mechanism it possesses the multiple function of holding power transmission to the displacement of part weak soil, to loose ground ground extruding, discharging consolidation and pile foundation simultaneously.Stake of the present invention pipe can be easily with geotextile stake jacket casing on granular pile.
The geotextile granular pile is appropriate to the land-based area and the Underwater Engineering treatment of soft foundation of the different soil properties of civil engineering construction.
Description of drawings
Fig. 1 is the structural representation of geotextile granular pile of the present invention;
Fig. 2 is the sectional view of Fig. 1 along the A-A line;
Fig. 3 is the structural representation of outer steel sleeve pipe of the present invention;
Fig. 4 is the structural representation of interior steel sleeve of the present invention;
Fig. 5 is the C portion enlarged drawing of Fig. 3;
Fig. 6 a is outer steel sleeve pipe, pile hammer state diagram in place;
Fig. 6 b is the driven piles state diagram of projected depth of outer steel sleeve pipe;
Fig. 6 c is that interior steel sleeve is prepared the state diagram of outside steel sleeve under inserting;
Fig. 6 d is the state diagram that interior steel sleeve inserts the outer steel sleeve pipe;
Fig. 6 e is that the outer steel sleeve pipe is to the state diagram of rising;
Fig. 6 f is the state diagram that outer steel sleeve pipe, interior steel sleeve are all extracted ground;
Number in the figure: 1-geotextile stake tube, 2-granular pile (constituting) by discrete material, 3-outer steel sleeve pipe, 4-manages bottom door, 5-first hanger, 6-enlarged head, steel sleeve in the 7-, 8-second hanger, 9-pile hammer (or claiming vibration hammer), 10-geotextile granular pile.
The specific embodiment
The method of processing soft foundation by earthwork fabric granular pile, it comprises the steps:
1) preparation of geotextile stake tube and stake pipe: the 1. preparation of geotextile stake tube: be processed into tubular with geotextile, obtain geotextile stake tube 1;
2. the preparation of stake pipe: the stake pipe is made up of outer steel sleeve pipe 3 and interior steel sleeve 7; As shown in Figure 3, Figure 4, the top of outer steel sleeve pipe 3 is enlarged head 6, the pore footpath of enlarged head 6 is greater than the pore footpath of outer steel sleeve pipe 3 bottoms, the pore footpath of enlarged head 6 is greater than the external diameter (promptly can slide in the pore of enlarged head 6 in the upper end of steel sleeve 7) of interior steel sleeve 7 upper end projection flanges, the pore footpath of outer steel sleeve pipe 3 bottoms is less than the external diameter (upper end of steel sleeve 7 can only be slided in the pore of enlarged head 6 promptly, can not slide into the pore of outer steel sleeve pipe 3 bottoms) of interior steel sleeve 7 upper end projection flanges; The pore footpath of outer steel sleeve pipe 3 bottoms is greater than the external diameter of interior steel sleeve 7, and when interior steel sleeve 7 inserted outer steel sleeve pipe 3, interior steel sleeve 7 was the space of placing geotextile stake tube with the gap that outer steel sleeve pipe 3 bottoms form; The lateral surface of the enlarged head 6 of outer steel sleeve pipe 3 is interval with (as welding) 2 first hanger, 5, the first hangers 5 and is provided with lifting hole(eyelet) (being used for outer steel sleeve pipe 3 is hung liter); The bottom-hinged pipe bottom door 4 of outer steel sleeve pipe 3, pipe bottom door 4 has 2 fans at least; Interior steel sleeve 7 upper ends are provided with the projection flange, are interval with (as welding) 2 second hanger, 8, the second hangers on the projection flange and are provided with lifting hole(eyelet) (being used for interior steel sleeve 7 is sling);
2) shown in Fig. 6 a, the pipe bottom door 4 of outer steel sleeve pipe 3 bottoms closes up, and outer steel sleeve pipe and pile hammer 9 are in place; Shown in Fig. 6 b, by pile hammer 9 with outer steel sleeve pipe 3 projected depth (squeezing into soft base) of driving piles to projected depth;
3) shown in Fig. 6 c, remove pile hammer 9 from the outer steel sleeve pipe, interior steel sleeve 7 to be sling, the bottom of steel sleeve 7 in geotextile stake tube 1 is enclosed within prepares to insert down; Shown in Fig. 6 d, then interior steel sleeve 7 and geotextile stake tube 1 are inserted in the pore of outer steel sleeve pipe 3 together; The second hanger hook of steel sleeve in taking off;
4) inwardly irritate discrete material in the pore of steel sleeve 7,, form granular pile 2 up to filling;
5) shown in Fig. 6 e, with outer steel sleeve pipe 3 rising of playing, pipe bottom door 4 on the outer steel sleeve pipe 3 is opened under the effect of weight, outer steel sleeve pipe 3 continues to rise, interior steel sleeve 7 is motionless, projection flange up to outer steel sleeve pipe 3 and interior steel sleeve 7 contacts, and the interior steel sleeve 7 of outer steel sleeve pipe 3 drives rises together and leaves soft base; Shown in Fig. 6 f, geotextile stake tube 1 and granular pile 2 are stayed original position under the weight effect, and geotextile stake tube 1 parcel granular pile 2 forms 10 (as shown in Figure 1 and Figure 2) of geotextile granular pile; Externally steel sleeve 3 vibrates (vibrator keeps vibration) in the process that rises; In outer steel sleeve pipe 3, extract interior steel sleeve 7 then, prepare next circulation;
6) from multiple step 2)-5), dispose to reinforcing soft foundation.
Described geotextile can be produced by macromolecular materials such as waste or used plastics, is geo-grid or geotextiles.
Described discrete material is rubble, gravel, copper smelter slag or building waste etc.

Claims (2)

1. the method for processing soft foundation by earthwork fabric granular pile is characterized in that it comprises the steps:
1) preparation of geotextile stake tube and stake pipe: the 1. preparation of geotextile stake tube: be processed into tubular with geotextile, obtain geotextile stake tube;
2. the preparation of stake pipe: the stake pipe is made up of outer steel sleeve pipe and interior steel sleeve; The pore footpath of outer steel sleeve pipe is greater than the external diameter of interior steel sleeve, and when interior steel sleeve inserted the outer steel sleeve pipe, the gap that interior steel sleeve and outer steel sleeve pipe bottom form was for placing the space of geotextile stake tube;
2) by pile hammer with the outer steel sleeve pipe projected depth of driving piles;
3) remove pile hammer from the outer steel sleeve pipe, interior steel sleeve is sling, geotextile stake jacket casing in the bottom of interior steel sleeve, is inserted interior steel sleeve and geotextile stake tube in the pore of outer steel sleeve pipe then together;
4) inwardly irritate discrete material in the pore of steel sleeve, form granular pile;
Described discrete material is rubble, gravel, copper smelter slag or building waste;
5) the outer steel sleeve pipe is played rising, steel sleeve rose together and leaves soft base in the outer steel sleeve pipe racks was moving; Geotextile stake tube and granular pile are stayed original position under the weight effect, geotextile stake tube parcel granular pile forms the geotextile granular pile; In the outer steel sleeve pipe, extract interior steel sleeve then, prepare next circulation;
6) repeating step 2)-5), dispose to reinforcing soft foundation.
2. the method for processing soft foundation by earthwork fabric granular pile according to claim 1, it is characterized in that: the top of outer steel sleeve pipe (3) is enlarged head (6), the pore footpath of enlarged head (6) is greater than the pore footpath of outer steel sleeve pipe (3) bottom, the pore footpath of enlarged head (6) is greater than the external diameter of interior steel sleeve (7) upper end projection flange, and the pore footpath of outer steel sleeve pipe (3) bottom is less than the external diameter of interior steel sleeve (7) upper end projection flange; The pore footpath of outer steel sleeve pipe (3) bottom is greater than the external diameter of interior steel sleeve (7); The lateral surface of the enlarged head (6) of outer steel sleeve pipe (3) is interval with 2 first hangers (5), and first hanger (5) is provided with lifting hole(eyelet); The bottom-hinged pipe bottom door (4) of outer steel sleeve pipe (3), pipe bottom door (4) have 2 fans at least; Interior steel sleeve (7) upper end is provided with the projection flange, is interval with 2 second hangers (8) on the projection flange, and second hanger (8) is provided with lifting hole(eyelet).
CN200810197321XA 2008-10-21 2008-10-21 Method for processing soft foundation by earthwork fabric granular pile CN101392527B (en)

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CN200810197321XA CN101392527B (en) 2008-10-21 2008-10-21 Method for processing soft foundation by earthwork fabric granular pile

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Application Number Priority Date Filing Date Title
CN200810197321XA CN101392527B (en) 2008-10-21 2008-10-21 Method for processing soft foundation by earthwork fabric granular pile

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CN101392527B true CN101392527B (en) 2010-10-06

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Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101608457B (en) * 2009-07-27 2012-06-06 冯守中 Method for processing wharf foundation by geotextile granular material pile
CN102465524B (en) * 2010-11-11 2016-05-25 上海市政工程设计研究总院 Double radial mesh-cage sand-gravel pile and construction technology thereof
CN102168420B (en) * 2011-03-15 2012-12-19 冯守中 Method for processing soft soil base by geotextile light active material piles
CN104234032B (en) * 2014-09-01 2015-11-18 德州市公路工程总公司 The construction method of a kind of Y shape three-dimensional band drain strength core discrete material composite pile
CN104652407B (en) * 2015-01-05 2016-08-24 同济大学 A kind of band stirrup collapsible geosynthetics abnormity granular pile and construction method thereof
CN104988896B (en) * 2015-05-13 2017-01-25 刘闯 Minitype friction short tubular pile composite foundation structure and constructing method thereof
CN105780753B (en) * 2016-03-28 2018-08-10 北京中岩大地科技股份有限公司 The construction method of solidified earth stake
CN108385651B (en) * 2018-03-23 2020-12-29 重庆大学 Design and construction method for reinforcing soft foundation by using composite geotextile

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1273713A2 (en) * 2001-07-07 2003-01-08 KELLER GRUNDBAU GmbH Method for constructing material columns to improve soil consolidation
CN2876184Y (en) * 2006-03-29 2007-03-07 河海大学 Internal filling type pressure reducing well pipe
CN1928250A (en) * 2006-07-25 2007-03-14 兰州理工大学 Method for reinforcing dispersive materials pile
CN200946265Y (en) * 2006-06-26 2007-09-12 河海大学 Vertical tube type grating reinforced stone column

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1273713A2 (en) * 2001-07-07 2003-01-08 KELLER GRUNDBAU GmbH Method for constructing material columns to improve soil consolidation
CN2876184Y (en) * 2006-03-29 2007-03-07 河海大学 Internal filling type pressure reducing well pipe
CN200946265Y (en) * 2006-06-26 2007-09-12 河海大学 Vertical tube type grating reinforced stone column
CN1928250A (en) * 2006-07-25 2007-03-14 兰州理工大学 Method for reinforcing dispersive materials pile

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
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Assignee: Wuhan Guangyi Engineering Consultation Co., Ltd.

Assignor: Feng Shouzhong|Yan Shu Wang

Contract record no.: 2011420000260

Denomination of invention: Method for processing soft foundation by earthwork fabric granular pile

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