CN101343874A

CN101343874A - Wrapping pile

Info

Publication number: CN101343874A
Application number: CNA200710018257XA
Authority: CN
Inventors: 黄明
Original assignee: SHAANXI CHANGJIA INDUSTRY DEVELOPMENT Co Ltd
Current assignee: Shaanxi long fine Construction Engineering Co., Ltd.
Priority date: 2007-07-13
Filing date: 2007-07-13
Publication date: 2009-01-14
Anticipated expiration: 2027-07-13
Also published as: CN101343874B

Abstract

The invention relates to a novel building foundation treatment technique in the salty soil area. The invention aims at developing a novel building foundation treatment technique in the salty soil area - a wrapped pile, that is, a pile material is wrapped with a geotechnical fabric bag. The artificial foundation processed with the method is called as a wrapped pile compound foundation. The invention adopts the structure: the pile material 1 is surrounded and fixed in the geotechnical fabric bag 2 to limit the sideward movement of the pile material 1, a radial surrounding force 5 of the pile is enhanced and improved, a radial supporting force 6 of the surrounding soil of the pile is also enhanced, the vertical load can be transferred to the deep part of the pile, and the supporting force of the whole pile is exerted, and the foundation bearing force is enhanced. The novel building foundation treatment technique has the advantages that the concentration of the bottom surface stress of a bearing table can be reduced, the burden of loads of the pile and soil is adjusted, thereby guaranteeing that the pile and soil play an obvious role in bearing the loads jointly, the filling material can also be saved by about 30 percent, the novel building foundation treatment technique is reasonable and economical, the construction is simple, and the quality of pile building is high.

Description

Wrapping pile

(1), described field: the present invention relates to a kind of saline soil area building lot and handle new technology.

(2), background technology:

The method for processing foundation of saline soil area has following four kinds at present:

1, adopt reinforced concrete pile or piling bar, the bittern corrosion harmfulness is difficult to solve, and does not reach to use can be corroded the length of time bad and lost efficacy, simultaneously the cost height.

2, the reinforcement mechanism of replacement stone pile composite foundation is the ground extruding processing effect to foundation soil, by injection broken stone pile in soil and the water, the gas that squeeze in the soil, to reach the compacted effect of stake week soil, improvement foundation soil engineering properties and the intensity that increases ground.But the underground water of saline soil area is bittern, and proportion height, viscosity are big, discharges difficulty and slowly, undesirable with the compacted effect of broken stone pile method, bearing capacity difficulty reaches designing requirement, after the draining convalescence long, have a strong impact on the construction and the delay duration of follow-up engineering.

3, other granular piles, its compacted effect is undesirable, stake Zhou Tuwei weak soil (shearing force is low), stake week, soil was on the low side to the radial support power of stake, and the bulging failure zone appeared near the stake top when pile body was subjected to vertical pressure, can not obtain designed radial support power, cylinder will produce bulging and destroy, settling amount is big, and bearing capacity is low, does not reach designing requirement.

4, dynamic compaction method, local form " spongy soil " influences the construction of follow-up engineering and delays the duration, and bearing capacity does not reach designing requirement.

Salinized soil is under the jurisdiction of silty clay and the silt that contains bittern, and the distortion hard intensity is low, engineering property is poor, corrosivity is strong.More than the method for processing foundation of four kinds of saline soil areas all undesirable.

(3), summary of the invention:

The objective of the invention is to develop a kind of new method-Wrapping pile that carries out the ground processing at saline soil area, be about to material of body of a pile and wrap up with geotechnological cloth bag.The artificial foundation who handles with this method is called " Wrapping pile composite foundation ".This method can thoroughly solve the shortcoming of above-mentioned four kinds of saline soil area method for processing foundation, improves the bearing capacity of foundation slab characteristic value significantly, meets design requirement and the construction period weak point.

Technical solution of the present invention:

Wrapping pile is formed integral body by material of body of a pile (1) and geotechnological cloth bag (2) and a stake hole (3), adopt spiral drilling machine construction stake hole (3), after stake hole (3) is drilled to, geotechnological cloth bag (2) is enclosed within outside the sleeve (4), be lowered to then in the hole (3), reach projected depth, in sleeve (4), inject quantitative material of body of a pile (1) again, after having annotated, vibration sleeve (4) makes material of body of a pile (1) vibratory compaction when mentioning (extraction) sleeve (4), after the Wrapping pile construction of monoblock ground is finished, at top construction rubble mattress layer, form a Wrapping pile composite foundation again.

It is characterized in that: material of body of a pile (1) is enclosed solid in geotechnological cloth bag (2), the shifted laterally of restriction material of body of a pile (1), can improve and improve pile body and radially enclose limit power (5), also can improve the radial support power (6) of stake week soil, vertical load can be delivered to the deep of stake, bring into play the support force of whole pile body, improve the bearing capacity of ground.

The material of described geotechnological cloth bag (2) is a polypropylene, has characteristics acidproof, alkaline-resisting, anticorrosive, that intensity is high, stability is strong.

Described material of body of a pile (1) is a rubble.

Described material of body of a pile (1) also can replace with sandstone or synthetic soil or concrete.

Described spiral drilling machine construction stake hole, stake bore dia 200～300mm, hole depth is decided according to design, can guarantee not destroy the original structure of foundation soil.

Described sleeve (4) is the steel pipe that adapts with the stake hole.

The described particle diameter of quantitative material of body of a pile (1) that injects in sleeve (4) is by the designing requirement grating.

Advantage of the present invention and effect:

Through on probation, compare with background technology, this scheme can either reduce cushion cap bottom surface stress to be concentrated, and adjusts sharing of the native load of stake, and then guarantee that stake soil bears load jointly and play tangible effect, can save filler about 30% again, rationally economical again, and construction is simple, the pile quality height, compare and characteristic value of foundation bearing capacity can be doubled with similar method for processing foundation, shorten the construction period twice, can give full play to economic benefit of investment.

(4), description of drawings:

Accompanying drawing is a Wrapping pile overall structure schematic diagram, number in the figure: the 1-material of body of a pile, and 2-geotechnique cloth bag, 3-stake hole, 4-sleeve, 5-radially enclose limit power, 6-radial support power.

(5), specific embodiment: referring to accompanying drawing, in this Wrapping pile, material of body of a pile 1 encloses solid in

geotechnological cloth bag

2,1 shifted laterally of restriction material of body of a pile, can improve and improve pile body and radially enclose limit power 5, also can improve the radial support power 6 of stake week soil, vertical load can be delivered to the deep of stake, bring into play the support force of whole pile body, improve the bearing capacity of ground.

This Wrapping pile adopts spiral drilling machine construction stake hole 3, after stake hole 3 is drilled to, geotechnological cloth bag 2 is enclosed within outside the sleeve 4, is lowered to then in the hole 3, reach projected depth, in sleeve 4, inject quantitative material of body of a pile 1 again, vibrate sleeve 4 when after having annotated, mentioning (extraction) sleeve 4, make material of body of a pile 1 vibratory compaction, after the Wrapping pile construction of monoblock ground is finished, at top construction rubble mattress layer, form a Wrapping pile composite foundation again.

Claims

1, Wrapping pile is formed integral body by material of body of a pile (1) and geotechnological cloth bag (2) and a stake hole (3), adopt spiral drilling machine construction stake hole (3), after stake hole (3) is drilled to, geotechnological cloth bag (2) is enclosed within outside the sleeve (4), be lowered to then in the hole (3), reach projected depth, in sleeve (4), inject quantitative material of body of a pile (1) again, after having annotated, vibration sleeve (4) makes material of body of a pile (1) vibratory compaction when mentioning (extraction) sleeve (4), after the Wrapping pile construction of monoblock ground is finished, at top construction rubble mattress layer, form a Wrapping pile composite foundation again.

2, Wrapping pile according to claim 1, it is characterized in that: material of body of a pile (1) is enclosed solid in geotechnological cloth bag (2), the shifted laterally of restriction material of body of a pile (1), can improve and improve pile body and radially enclose limit power (5), also can improve the radial support power (6) of stake week soil, vertical load can be delivered to the deep of stake, brings into play the support force of whole pile body, improves the bearing capacity of ground.

3, Wrapping pile according to claim 1 and 2 is characterized in that: the material of geotechnological cloth bag (2) is a polypropylene.

4, Wrapping pile according to claim 1 and 2 is characterized in that: material of body of a pile (1) is a rubble.

5, Wrapping pile according to claim 1 and 2 is characterized in that: material of body of a pile (1) also can replace with sandstone or synthetic soil or concrete.

6, Wrapping pile according to claim 1 and 2 is characterized in that: spiral drilling machine construction stake hole (3), and stake hole (3) diameter 200～300mm, hole depth is decided according to design, can guarantee not destroy the original structure of foundation soil.

7, Wrapping pile according to claim 1 and 2 is characterized in that: sleeve (4) is the steel pipe that adapts with the stake hole.

8, Wrapping pile according to claim 1 and 2 is characterized in that: the particle diameter that injects quantitative material of body of a pile (1) in sleeve (4) is by the designing requirement grating.