CN100497843C - Construction method of full sleeve large diameter vibration soil taking and filling pile - Google Patents

Construction method of full sleeve large diameter vibration soil taking and filling pile Download PDF

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Publication number
CN100497843C
CN100497843C CNB200610070306XA CN200610070306A CN100497843C CN 100497843 C CN100497843 C CN 100497843C CN B200610070306X A CNB200610070306X A CN B200610070306XA CN 200610070306 A CN200610070306 A CN 200610070306A CN 100497843 C CN100497843 C CN 100497843C
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sleeve
soil
pipe
pile
construction
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CN1986975A (en
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简洪钰
郑添寿
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Fujian Yongqiang Geotechnical Co., Ltd.
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FUJIAN YONGQIANG GEOTCHNICAL ENGINEERING Co Ltd
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Abstract

A construction method of cast-in-situ pile by use of the whole sleeve pipe and taking soil out in large-diameter vibration mode features that the internal and external sleeve pipes are used as the tool for forming hole and taking soil out, the MF or HF vibrating hammer with great vibration exciting force plus pressurizing and water lubricating are used to greatly increase the power of sinking pipe and soil taking unit to pass through foundation, after the external pipe is sunk in foundation the reinforcing bar cage is put in it and concrete is filled in it, and the external pipe is finally pulled up under the action of said vibrating hammer.

Description

Full sleeve large diameter vibration soil taking and filling pile construction method
One, technical field
The present invention relates to a kind of pile base construction method, the vibropile job practices especially fetches earth.
Two, background technology
At present, the pile foundation of using in all kinds of engineerings reaches tens of kinds, according to the difference of construction technology, various flexibilities half flexible pile (as cement mixing pile and powder spray piling, sand-gravel pile or broken stone pile) etc. that the present leading stake type of China is divided into bored pile, vibropile, compaction pile, hand excavated pile, pile for prestressed pipe, precast square pile and is used for treatment of soft foundation.With regard to all kinds of leading stake type of present use, there are the following problems:
(1) quality problems such as the normal appearance of bored pile such as broken pile, necking down, segregation folder mud cause hidden dangers in project; The construction technology complexity, the engineering time is longer, and the labour has high input; The solid waste amount is big, and environment pollution is serious; The difficult discharge with mud off of sediment stayed a stake side mud skin at the bottom of the hole, greatly reduces the stake end counter-force and the sidewall friction power of pile foundation thus, reduced the bearing capacity of pile foundation.
(2) although precast square pile construction quality is better controlled, must be prefabricated in the factory, equipment requires high; Cement grade and concrete strength require high, and the transport amount is big; Silent piling formula construction equipment heaviness, site requirements height, equipment transport that to transport difficulty big, displacement difficulty, cost height; Then vibration is big to adopt the paddle type mill construction, and pile crown is easily broken.
(3) vibropile and compaction pile all belong to soil compaction construction, and be big to the safety and the stability influence of front and back stake and surrounding building, and also surrounding environment is had a significant impact because of its noise and vibration during compaction pile construction.
(4) hand excavated pile because have potential safety hazard and be difficult to solve stream mud, the quicksand problem is restricted in many areas.
In a word, always there is such or such problem in all kinds of pile foundations at pile foundation quality, aspects such as influence, working security and construction costs to surrounding environment and building more than.In recent years, released a complete set of Guan Xuan by introduction of foreign technology and dug castinplace pile and dematron and dash and grasp native castinplace pile etc., though solved problems such as soil compaction and mud contamination, these equipment price noble qualities, the construction cost height, effect is not high yet.
Three, summary of the invention
The purpose of this invention is to provide that a kind of pile foundation quality is good, when construction to surrounding environment and building do not have influence, construct highly effective and safe and the low full sleeve large diameter vibration soil taking and filling pile construction method of construction costs.
In order to realize above purpose, full sleeve large diameter vibration soil taking and filling pile construction method of the present invention comprises pore-forming and concrete spouting two parts operation, this pore-forming operation is the soil taking hole forming facility with inside and outside sleeve pipe, its diameter of inner sleeve as soil sampler is slightly less than outer tube, and inside and outside sleeve pipe all adopts the total length steel sleeve; The middle and high frequency vibration hammer effect of outer tube and inner sleeve big exciting force more than 1000kN is lowered in the foundation soil; In inner sleeve buried the sinking process, the water pipe by being installed in the inner sleeve inwall was to soil body water filling, with the softening soil body and reduce the soil body and the pipe friction resistance, the penetration resistance of inner sleeve reduced significantly; The pouring construction step of pore-forming and concrete pile is as follows:
1. dither is squeezed into outer tube, inner sleeve, and soil enters inner sleeve;
2. inner sleeve is sink to design elevation;
3. dither is extracted inner sleeve, and soil proposes with pipe;
4. vibrate casting, sediment in the cleaning eye;
5. install reinforcing cage;
6. fluid concrete;
7. dither is extracted outer tube;
8. pile.
Above-mentioned full sleeve large diameter vibration soil taking and filling pile construction method is when foundation soil is loose, and its construction sequence first step is that outer tube and inner sleeve are squeezed into by dither simultaneously, and soil enters inner sleeve.
Above-mentioned full sleeve large diameter vibration soil taking and filling pile construction method is when foundation soil is hard, and its construction sequence first step is that first dither is squeezed into outer tube to design elevation, and dither is squeezed into inner sleeve again, and soil enters inner sleeve.
Above-mentioned full sleeve large diameter vibration soil taking and filling pile construction method pressurizes to increase the ability that inside and outside sleeve pipe penetrates foundation soil to vibrating hammer when vibrating hammer vibrates when foundation soil is hard.
When stake end soil layer is looser, flow out in the stake pipe for preventing sand, cobble, rubble and stream mud shape soil, utilize the flap that fetches earth of inner sleeve stake end, close when fetching earth, open when unloading soil.
Above technical method has following beneficial effect owing to adopt the middle and high frequency vibration hammer of big exciting force and vibrating hammer pressurization and water lubrication technical measures:
1, realizes that amplitude peak ground increase immersed tube and soil sampler penetrate the ability of foundation soil, can make strong-weathered rock most ground soil in addition enter tube chamber smoothly, avoid causing soil compaction in the immersed tube process or forming the phenomenon that the soil plug makes sleeve pipe be difficult to sink to, can guarantee to grow up in 20 meters, the outer tube of diameter 800~2000 is disposable to be sunk in the ground.This technology only needs a set of equipment just can finish to sink to sleeve pipe and operation such as fetch earth, the device efficiency height; According to pile frame height and stake footpath size, the earth pillar of this soil sampler about generally can disposable taking-up 20m reduced the soil body and pipe friction resistance significantly because vibration adds water lubrication, can be by vibration like a cork with earth pillar discharge in the soil sampler, and soil extracting efficiency is high.Thereby adopt the work efficiency of this job practices above at double the raising all to be arranged than existing all kinds of pile base construction methods.
2, inner sleeve realization vibration is fetched earth fast on the one hand, has avoided soil compaction; On the other hand, middle and high frequency vibration hammer belongs to the environment-friendly type vibratory equipment again, thus to periphery build, structure and road piping influence be little, and avoided the pollution of mud to surrounding enviroment.
3, occur flowing problems such as mud, quicksand owing to adopting the total length steel sleeve to avoid, and can guarantee the dried operation concrete perfusion of most ground soil layers realizations basically, can increase substantially the quality of pile concrete in conjunction with vibration pipe-drawing.
4, soil sampler is simple in structure, and miscellaneous equipment is existing equipment, and constructing operation is very convenient.
Four, description of drawings
Fig. 1 is the construction process figure that the inside and outside sleeve pipe of full sleeve large diameter vibration soil taking and filling pile construction method of the present invention sinks simultaneously;
Fig. 2 is the construction process figure that full sleeve large diameter vibration soil taking and filling pile construction method outer tube of the present invention sinks prior to inner sleeve;
Five, the specific embodiment
Below in conjunction with the drawings and specific embodiments the present invention is described in further detail.
Embodiment 1: full sleeve large diameter vibration soil taking and filling pile construction method of the present invention comprises pore-forming and concrete spouting two parts operation, this pore-forming operation is the soil taking hole forming facility with inside and outside sleeve pipe, inner sleeve 4 and the gap between the outer tube 3 as soil sampler are 5-15mm, and inside and outside sleeve pipe all adopts the total length steel sleeve; Outer tube 3 and inner sleeve 4 are lowered in the foundation soil by clamper 2 middle and high frequency vibration hammer 1 effect of big exciting force more than 1000kN; In inner sleeve 4 buried the sinking process, the water pipe by being installed in the inner sleeve inwall was to soil body water filling, with the softening soil body and reduce the soil body and the pipe friction resistance, the penetration resistance of inner sleeve reduced significantly.As shown in Figure 1, the pouring construction step of pore-forming and concrete pile is as follows:
1. loose because of foundation soil, outer tube 3 and inner sleeve 4 are squeezed into by dither simultaneously, and soil enters inner sleeve 4;
2. inner sleeve 4 is sink to design elevation;
3. dither is extracted inner sleeve 4, and soil proposes with pipe;
4. vibrate casting, sediment in the cleaning eye;
5. install reinforcing cage;
6. fluid concrete;
7. dither is extracted outer tube 3;
8. pile.
Looser because of stake end soil layer, flow out in the stake pipe for preventing sand, cobble, rubble and stream mud shape soil, utilize the flap that fetches earth that installs additional at inner sleeve stake end, close when fetching earth, open when unloading soil.
Embodiment 2: full sleeve large diameter vibration soil taking and filling pile construction method of the present invention comprises pore-forming and concrete spouting two parts operation, this pore-forming operation is the soil taking hole forming facility with inside and outside sleeve pipe, inner sleeve 4 and the gap between the outer tube 3 as soil sampler are 5-15mm, and inside and outside sleeve pipe all adopts the total length steel sleeve; Outer tube 3 and inner sleeve 4 are lowered in the foundation soil by clamper 2 middle and high frequency vibration hammer 1 effect of big exciting force more than 1000kN; When vibrating hammer vibrates, vibrating hammer 1 is pressurizeed to increase the ability that inside and outside sleeve pipe penetrates foundation soil; In inner sleeve 4 buried the sinking process, the water pipe by being installed in the inner sleeve inwall was to soil body water filling, with the softening soil body and reduce the soil body and the pipe friction resistance, the penetration resistance of inner sleeve 4 reduced significantly.As shown in Figure 2, the pouring construction step of pore-forming and concrete pile is as follows:
1.-1: because of foundation soil is harder, first dither is squeezed into outer tube 3 to design elevation,
1.-2: dither is squeezed into inner sleeve 4 again, and soil enters inner sleeve 4;
2. inner sleeve 4 is sink to design elevation;
3. dither is extracted inner sleeve 4, and soil proposes with pipe;
4. vibrate casting, sediment in the cleaning eye;
5. install reinforcing cage;
6. fluid concrete;
7. dither is extracted outer tube;
8. pile.
When actual job, can do following selection as the case may be:
When 1, foundation soil was hard, first dither was squeezed into outer tube 3 to design elevation, and dither is squeezed into inner sleeve 4 again; When foundation soil was loose, outer tube 3 and inner sleeve 4 were squeezed into by dither simultaneously.
2, if looser, in the stake pipe, flow out, can utilize the flap that fetches earth that installs additional at inner sleeve stake end, close when fetching earth, open when unloading soil for preventing sand, cobble, rubble and stream mud shape soil because of stake end soil layer.
3, fetch earth and once or several times to carry out.
4, the embedding rock then can be selected execution of instrument embedding rocks such as down-the-hole hammer or punching hammer for use if desired, puts into reinforcing cage after waiting to meet design requirement.
5, determine whether to adopt underwater concreting according to groundwater condition or the operation concrete perfusion is done in the back of drawing water, extract outer tube 3 by vibrating hammer at last, thereby realize the major diameter soil taking and filling pile.

Claims (1)

1, a kind of full sleeve large diameter vibration soil taking and filling pile construction method, it comprises pore-forming and concrete spouting two parts operation, this pore-forming operation is the soil taking hole forming facility with inside and outside sleeve pipe, its diameter of inner sleeve (4) as soil sampler is slightly less than outer tube (3), in inner sleeve (4) buries the sinking process, water pipe by being installed in the inner sleeve inwall is to soil body water filling, with the softening soil body and reduce the soil body and the pipe friction resistance, the penetration resistance of inner sleeve (4) reduced significantly; The pouring construction step of pore-forming and concrete pile is as follows:
1. outer tube (3), inner sleeve (4) are squeezed in vibration, and soil enters inner sleeve (4);
2. inner sleeve (4) is sink to design elevation;
3. inner sleeve (4) is extracted in vibration, and soil proposes with pipe;
4. vibrate casting, sediment in the cleaning eye;
5. install reinforcing cage;
6. fluid concrete;
7. dither is extracted outer tube (3);
8. pile;
It is characterized in that: inside and outside sleeve pipe all adopts the total length steel sleeve; When vibrating hammer vibrates, vibrating hammer (1) is pressurizeed to increase the ability that inside and outside sleeve pipe penetrates foundation soil; Outer tube (3) and inner sleeve (4) are lowered in the foundation soil by clamper (2) middle and high frequency vibration hammer (1) effect of big exciting force more than 1000kN.
CNB200610070306XA 2006-11-13 2006-11-13 Construction method of full sleeve large diameter vibration soil taking and filling pile Active CN100497843C (en)

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CN102080374B (en) * 2009-12-01 2012-05-02 中冶交通工程技术有限公司 Construction method of concrete filling piles
CN101709579B (en) * 2009-12-03 2011-12-07 福建永强岩土工程有限公司 Construction method of conjoined mortar piling wall
CN102345287B (en) * 2010-08-01 2015-02-25 常雷 Construction method of large-diameter cast-in-situ thin-wall concrete composite pile forming device
CN102011398B (en) * 2010-10-23 2014-11-05 孔超 Device and method for forming high-frequency vibratory pressing displacement bored concrete pile
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CN102400460A (en) * 2011-11-30 2012-04-04 昆明捷程桩工有限责任公司 Construction method for preventing pile diameter of concrete pouring pile from being varied
WO2013149471A1 (en) * 2012-04-01 2013-10-10 上海振中机械制造有限公司 Piling method based on hole-forming by sinking double pipes and pulling inner pipe, and application thereof
CN102605788A (en) * 2012-04-01 2012-07-25 上海振中机械制造有限公司 Double-tube-sinking and inner-tube-drawing bored cast-in-place pile construction method and application
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CN105274984A (en) * 2014-06-05 2016-01-27 中天建设集团有限公司 Double-casing-pipe full-circle-swinging erect column pile construction method
CN104563118B (en) * 2014-12-24 2016-06-22 福建工程学院 The pre-poured built pile construction method of full-sleeve vibration soil taking
CN105178315A (en) * 2015-09-14 2015-12-23 王警 Pouring type pile driver and pile driving method using pile driver
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