CN101736746B - Construction method for vibrator pipe sinking high-pressure grouting underpinning pile extracting - Google Patents

Construction method for vibrator pipe sinking high-pressure grouting underpinning pile extracting Download PDF

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Publication number
CN101736746B
CN101736746B CN2009101999002A CN200910199900A CN101736746B CN 101736746 B CN101736746 B CN 101736746B CN 2009101999002 A CN2009101999002 A CN 2009101999002A CN 200910199900 A CN200910199900 A CN 200910199900A CN 101736746 B CN101736746 B CN 101736746B
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CN
China
Prior art keywords
pile
stake
steel sleeve
construction
soil
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CN2009101999002A
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Chinese (zh)
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CN101736746A (en
Inventor
陈富海
唐红书
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上海智平基础工程有限公司
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Publication of CN101736746A publication Critical patent/CN101736746A/en
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Abstract

The invention discloses a construction method for vibrator pipe sinking high-pressure grouting underpinning pile extracting, which is characterized by comprising the following steps: vibrating and sinking a steel sleeve; grouting and stripping a pile body and peripheral soil body; extracting the pile; and grouting and underpinning. Compared with the prior art, the construction method has the advantages of small pile extracting force by only considering the self-weight of the pile body, low vibration noise, complete elimination of underground obstacles, and no hidden dangers remaining in subsequent pile foundation construction, great improvement on the bearing capacity of the foundation soil, and no influence on the peripheral environment. Meanwhile, the construction method has convenient construction and high working efficiency, and is a resource-saving and environment-friendly construction method.

Description

The job practices of vibrator pipe sinking high-pressure grouting underpinning pile extracting

Technical field

The present invention relates to the pile foundation of building structure, especially a kind of job practices that is used for the vibrator pipe sinking high-pressure grouting underpinning pile extracting of old structure, buildings pile dismounting.

Background technology

At present, in the ground and foundation construction of old building transformation project, the pile foundation of structure, building is removed, mainly adopt percussion and grabbing method, hang method by force and the immersed tube water flood is pulled out preformed pile, castinplace pile, piling bar and timber etc.Percussion and grabbing method: adopt weight to smash underground obstacle (pile body), grab out chip with grab bucket then, the shortcoming of percussion and grabbing method construction is: vibrating noise is big, long in time limit, cost is high.Hang method by force: crane gears such as employing large tonnage crane lift by crane by force to be extracted, and the shortcoming of hanging the method construction by force is: often pull off underground obstacle, can't thoroughly remove underground pile body, giving later on, construction stays hidden danger.Immersed tube water flood: adopt the machine power pressurization to sink to steel pipe, the soil body of water filling displacement pile foundation periphery, play the wire rope lifting to treat pile pulling then, this job practices adopts the soil body on water underpinned pile primitive period limit, chips such as the sand grains in the soil body are because at the bottom of the deadweight effect sinks down into, cause hoisting wirerope can't transfer to design attitude, pile pulling is failed easily.

Above several method construction behind the rid, is generally adopted dregs filling perforation hole back and forth, because backfill is loose than closely knit naturally soil, thereby influences the bearing capacity of foundation soil and follow-up pile foundation construction, causes pile position deviation easily.

Summary of the invention

The job practices that a kind of vibrator pipe sinking high-pressure grouting underpinning pile extracting of providing at the deficiencies in the prior art is provided, it is little that it has pile pulling power, only need to consider that the pile body deadweight gets final product, and vibrating noise is little, underground obstacle is removed thoroughly, and follow-up pile foundation construction is not stayed hidden danger, has improved the supporting capacity of foundation soil greatly, surrounding enviroment there is not influence, easy construction, high efficiency, real is a kind of resources conservation, eco-friendly job practices.

The object of the present invention is achieved like this: a kind of job practices of vibrator pipe sinking high-pressure grouting underpinning pile extracting, be characterized in that this method comprises: the pile body periphery soil body, pile pulling and grouting underpinning are peeled off in the heavy steel sleeve of vibration, slip casting, and its concrete construction comprises the steps:

A, the heavy steel sleeve of vibration

Utilize transit that stake is positioned, the soil body of excavation preformed pile periphery also exposes pile crown, adopts the vibration sinking tube method that steel sleeve is sink to the design elevation of stake, and the steel sleeve diameter should be greater than circle stake diameter 500mm or side's stake diagonal 200mm, and length is greater than the long 1.0m of stake;

The pile body periphery soil body is peeled off in b, slip casting

Adopt the high-pressure rotary-spray rig along the design elevation that gets into stake between steel sleeve inwall and pile lining down, high pressure injects coal ash pulp 300mm to the stake in the time of trip-out, and the soil body of pile foundation periphery in the steel sleeve is all peeled off, and the water/binder ratio of coal ash pulp is 1: 1 weight ratio;

C, pile pulling

Is main hanging with the wire rope hoisting ring along the 500mm place, top that pile lining is transferred at the bottom of the stake, it is auxilliary hanging that another wire rope hoisting ring is located at stake long 1/2 downward 1 meter, adopting pile pulling equipment to lift wire rope holds pile body tightly, begin pile pulling then, when stake hangs out ground 1.5m, strain with the pile body binding and by crane with wire rope, when having continued to winch to overhead 5m then, cut stake, repeat this step, all extract until stake;

D, grouting underpinning

After treating that stake is extracted, the stake hole adopts a high-pressure slip-casting filling to underpin, and slurry is that cement, flyash, sand mix by 1: 2: 7 weight ratio, high-pressure slip-casting by the hole in stake hole at the bottom of from bottom to top grouting filling underpin to ground, extract steel sleeve then.

Be provided with the locator of wedge in the described steel sleeve, locator is four, evenly is arranged on the lower end in the steel sleeve, and is affixed with the inwall of steel sleeve.

It is little that the present invention compared with prior art has pile pulling power, only need to consider that the pile body deadweight gets final product, vibrating noise is little, underground obstacle is removed thoroughly, follow-up pile foundation construction is not stayed hidden danger, improved the supporting capacity of foundation soil greatly, surrounding enviroment have not been had influence, and easy construction, high efficiency, real is a kind of resources conservation, environmentally friendly job practices.

Description of drawings

Fig. 1 is a structural representation of the present invention

Fig. 2 is Fig. 1 vertical view

Fig. 3 is the invention process illustration

The specific embodiment

Consult accompanying drawing 1, accompanying drawing 2, construction sequence of the present invention comprises: the pile body periphery soil body, pile pulling and grouting underpinning are peeled off in the heavy steel sleeve of vibration, slip casting.Excavate treat pile pulling 1 the stake roof construction and the stake 1 periphery the soil body and expose pile crown, adopt the vibration sinking tube method steel sleeve 2 to be sink to the design elevation of stake 1, be provided with the locator 3 of wedge in the steel sleeve 2, locator 3 is four, evenly be arranged on the lower end in the steel sleeve 2, affixed with the inwall of steel sleeve 2, locator 3 mainly is the spacing that guarantees steel sleeve 2 and stake 1, bores and transfer wire rope hoisting ring 45 times to make things convenient for the high-pressure rotary-spray drilling rod.Then with high-pressure rotary-spray drilling rod 5 along the design elevation that is drilled into stake 1 under steel sleeve 2 inwalls and stake 1 the sidewall, high-pressure rotary-spray injects coal ash pulp when high-pressure rotary-spray drilling rod 5 rises, the peripheral soil body of stake 1 is all peeled off, the water/binder ratio of coal ash pulp is 1: 1 weight ratio, the main effect of the pulverized fuel ash slurry chips such as sand grains in the soil body that are to suspend, make wire rope hoisting ring 4 can transfer to design attitude, adopt two-point method lifting stake 1 then, when certain altitude is hung in stake 1, cut stake, extract fully up to stake 1, after stake 1 is extracted the high-pressure slip-casting filling is carried out in the stake hole and underpined, slurry is a cement, flyash, sand mixes by 1: 2: 7 weight ratio.

Consulting accompanying drawing 3, is example with the pile pulling engineering, and the present invention is further elaborated:

(1), location excavation pile crown

Utilize transit that stake 1 is positioned, the peripheral soil body of excavation preformed pile 1 also exposes pile crown.

(2), the heavy steel sleeve of vibration

Adopt the vibration sinking tube method steel sleeve 2 to be sink to the design elevation of stake 1, be provided with the locator 3 of wedge in the steel sleeve 2, locator 3 is four, evenly be arranged on the lower end in the steel sleeve 2, affixed with the inwall of steel sleeve 2, the diameter of steel sleeve 2 should be greater than circle stake diameter 500mm or side's stake diagonal 200mm, and length is greater than the long 1.0m of stake.

(3), the pile body periphery soil body is peeled off in slip casting

Along the design elevation that is drilled into stake 1 under the sidewall of steel sleeve 2 inwalls and stake 1, high-pressure rotary-spray injects coal ash pulp when promoting high-pressure rotary-spray drilling rod 5, and the peripheral soil body of stake 1 is all peeled off with high-pressure rotary-spray drilling rod 5, and the water/binder ratio of coal ash pulp is 1: 1 weight ratio.

(4), pile pulling

The lifting of stake 1 is adopted at 2 and is hung method, it is main hanging that one wire rope hoisting ring 4 is transferred to the 500mm place, top of stake 1 bottom along the sidewall of stake 1,1/2 downward 1 meter that another wire rope hoisting ring 4 is located at stake 1 length is auxilliary hanging, and adopts the 150T crane to lift wire rope stake 1 is held tightly, begins pile pulling then, when stake 1 hangs out ground 1.5m, again with wire rope with stake 1 binding and by the crane tension, when having continued to winch to overhead 5m then, cut, repeat this step, all extract until stake 1.

(5), grouting underpinning

After treating that stake 1 is extracted, the stake hole adopts a high-pressure slip-casting filling to underpin, and slurry is that cement, flyash, sand mix by 1: 2: 7 weight ratio, high-pressure slip-casting by the hole in stake hole at the bottom of from bottom to top grouting filling underpin to ground.

After stake was all extracted, the stake hole adopted a grouting filling to underpin, adopt cement, flyash, sand by 1: 2: 7 proportioning employing high-pressure slip-casting by the hole at the bottom of from bottom to top grouting filling underpin to ground.

(6), pull out steel sleeve

After former position backfill is closely knit, adopts pile pulling equipment to rise and pull out steel bushing 2 and clean next stand-by.

More than just the present invention will be further described, is not in order to the restriction this patent, all for the present invention's equivalence enforcement, all should be contained within the claim scope of this patent.

Claims (2)

1. the job practices of a vibrator pipe sinking high-pressure grouting underpinning pile extracting is characterized in that this method comprises: the pile body periphery soil body, pile pulling and grouting underpinning are peeled off in the heavy steel sleeve of vibration, slip casting, and its concrete construction comprises the steps:
A, the heavy steel sleeve of vibration
Utilize transit that stake is positioned, the soil body of excavation preformed pile periphery also exposes pile crown, adopts the vibration sinking tube method that steel sleeve is sink to the design elevation of stake, and the steel sleeve diameter should be greater than circle stake diameter 500mm or side's stake diagonal 200mm, and length is greater than the long 1.0m of stake;
The pile body periphery soil body is peeled off in b, slip casting
Adopt the high-pressure rotary-spray rig along the design elevation that gets into stake under a steel sleeve inwall and the sidewall, high pressure injects coal ash pulp to a beneath 300mm in the time of trip-out, and the soil body of pile body periphery in the steel sleeve is all peeled off, and the water/binder ratio of coal ash pulp is 1: 1 weight ratio;
C, pile pulling
Is main hanging with the wire rope hoisting ring along the 500mm place, top that pile lining is transferred at the bottom of the stake, it is auxilliary hanging that another wire rope hoisting ring is located at stake long 1/2 downward 1 meter, adopting pile pulling equipment to lift wire rope holds pile body tightly, begin pile pulling then, when stake hangs out ground 1.5m, strain with the pile body binding and by crane with wire rope, when having continued to winch to overhead 5m then, cut stake, repeat this step, all extract until stake;
D, grouting underpinning
After stake was extracted, the stake hole adopted a high-pressure slip-casting filling to underpin, and slurry is that cement, flyash, sand mix by 1: 2: 7 weight ratio, high-pressure slip-casting by the hole in stake hole at the bottom of from bottom to top grouting filling underpin to ground, extract steel sleeve then.
2. according to the job practices of the described vibrator pipe sinking high-pressure grouting underpinning pile extracting of claim 1, it is characterized in that being provided with in the described steel sleeve locator of wedge, locator is four, evenly is arranged on the lower end in the steel sleeve, and is affixed with the inwall of steel sleeve.
CN2009101999002A 2009-12-04 2009-12-04 Construction method for vibrator pipe sinking high-pressure grouting underpinning pile extracting CN101736746B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2009101999002A CN101736746B (en) 2009-12-04 2009-12-04 Construction method for vibrator pipe sinking high-pressure grouting underpinning pile extracting

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Application Number Priority Date Filing Date Title
CN2009101999002A CN101736746B (en) 2009-12-04 2009-12-04 Construction method for vibrator pipe sinking high-pressure grouting underpinning pile extracting

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CN101736746A CN101736746A (en) 2010-06-16
CN101736746B true CN101736746B (en) 2011-08-17

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Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102108705B (en) * 2011-03-07 2012-11-21 江苏现代造船技术有限公司 Marine wind driven generator mounting and transporting spud leg mud discharging, air injecting and washing device and method
CN103046550B (en) * 2013-01-08 2015-11-25 上海建工二建集团有限公司 A kind of vibrations collar pile pulling device and using method thereof
CN103485344A (en) * 2013-09-17 2014-01-01 常熟理工学院 Method for extracting construction engineering pile foundation
CN103556641A (en) * 2013-10-09 2014-02-05 中铁十三局集团有限公司 Grooving assisting method for in-pit underground diaphragm wall of existing basement
CN103669343B (en) * 2013-11-22 2015-07-15 河海大学 Detachable combined pile and detachment construction method thereof
CN104110027B (en) * 2013-12-02 2016-01-13 华北水利水电大学 Tool-type uplift pile
CN104652436B (en) * 2014-12-24 2017-06-27 福建工程学院 Steel sleeve high pressure water injection is loosened the soil pile-pulling construction method
CN105544544A (en) * 2015-12-16 2016-05-04 上海市城市建设设计研究总院 Method for quickly extracting pile under low clearance condition
CN105507321B (en) * 2015-12-16 2017-06-30 上海市城市建设设计研究总院(集团)有限公司 For the efficient process for sinking of existing prefabricated pile
CN108457273B (en) * 2018-03-17 2020-02-14 北京工业大学 Piling recovery method for steel pipe slope protection piles
CN108894224A (en) * 2018-08-03 2018-11-27 中冶沈勘工程技术有限公司 A kind of method for pulling out of static pressure pipe pile
CN109763489A (en) * 2019-02-18 2019-05-17 杭州昂创科技有限公司 The all casing high pressure water vapor injections of stake lubricate pile-pulling construction method

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