CN102704468A

CN102704468A - Construction method for immersed pipe cast-in-place pile

Info

Publication number: CN102704468A
Application number: CN201210192809XA
Authority: CN
Inventors: 宫能和
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-06-11
Filing date: 2012-06-11
Publication date: 2012-10-03
Anticipated expiration: 2032-06-11
Also published as: CN102704468B

Abstract

The invention relates to a construction method for an immersed pipe cast-in-place pile. The construction method adopts the technical scheme that an immersed pipe pile is piled into a foundation at first, a mixing pile machine is mounted in the position of the immersed pipe pile for piling when the immersed pipe pile is not solidified and formed after a steel pipe is pulled out, and then a mixing pile is withdrawn so as to form the immersed pipe cast-in-place pile. The construction method overcomes the disadvantages in an immersed pipe pile and a cast-in-place pile, and obtains a brand new pile. The construction method achieves the effects as follows: the advantages of the immersed pipe pile and the cast-in-place pile are exerted, the immersed pipe pile and the cast-in-place pile can achieve the synergy, and the pile with high strength is obtained; cost is saved, the method is simple and is easy to popularize and apply; and meanwhile, construction wastes can be utilized, so that better environmental protection can be achieved.

Description

Immersed tube adds the job practices of castinplace pile

Technical field

The present invention relates to a kind of job practices, particularly a kind of immersed tube adds the job practices of castinplace pile.

Background technology

Before the present invention, basis piling has many kinds, and is wherein commonly used like Submersed type stake and agitation pile (claiming castinplace pile again).Pipeline sinking pile is exactly that stake point bottom contact connects a steel pipe, and steel pipe is normally circular, and the centre is empty; The steel pipe top connects power set, starts power set, and the stake point is squeezed into ground; Steel pipe is just imbedded in the ground with the stake point, and steel pipe top one side connects hopper then, in steel pipe, drops into building stones, sandstone, cement etc. through hopper; Then steel pipe is extracted, the stake point is stayed in the ground, and back to be formed has just formed stake.The advantage of pipeline sinking pile is can accomplish homogeneous and controllable on vertically; Can also accomplish to drop at diverse location as required the cementing material of different proportion or different moisture content, intensity is also than higher, but shortcoming also is tangible; Be that diameter is too little; Need in ground, squeeze into many stakes, long in time limit, cost is high.Agitation pile is that power set drive driving shaft, by with driving shaft on blade agitate soil in ground of being fixedly connected, feed cement while stirring, utilize cement and earth to mix, form.The advantage of agitation pile is that diameter is big, though the intensity of the mixing of cement and earth own is not high, major diameter can reach more than 1 meter usually can bring quite high intensity; Pile-forming speed is fast; In same area ground, its quantity can be less than pipeline sinking pile, can only be cement but its defective is the cementing material of agitation pile; Can't add building stones, sandstone etc., intensity can't improve naturally.

Summary of the invention

The object of the invention just is to overcome above-mentioned defective, develops the job practices that a kind of immersed tube adds castinplace pile.

Technical scheme of the present invention is:

Immersed tube adds the job practices of castinplace pile, and its major technique step is:

(1) in ground, squeezes into earlier pipeline sinking pile;

(2) after extracting steel pipe, during the not fixed moulding of pipeline sinking pile, set up mixing pile machine piling in the pipeline sinking pile position;

(3) agitation pile is withdrawed from back formation immersed tube and add castinplace pile.

Advantage of the present invention and effect have been to combine pipeline sinking pile and agitation pile advantage separately, have cast out the two defective separately, make to have produced synergy between the two, have formed a kind of brand-new bore forming method.Be easy to apply, environmental protection, cost is low, and method of operating is simple.

Other advantages of the present invention and effect will continue to describe below.

Description of drawings

Fig. 1---process sketch map of the present invention.

Each label corresponding component is represented as follows among the figure:

Ground 1, stake point 2, steel pipe 3, hopper 4, power set 5, driving shaft 6, drive unit 7, blade 8.

The specific embodiment

As shown in Figure 1:

Earlier on ground 1, select to beat the position of pipeline sinking pile, steel pipe 3 bottoms are stuck in that contact connects on the step on sharp 2 tops of stake, and power set 5 contact with steel pipe 3 tops and are connected; Start power set 5 and constantly hit steel pipe 3 tops; Steel pipe 3 bottoms head on stake point 2 and get in the ground, until arriving preposition fully, from hopper 4, in steel pipe 3, drop into building stones, sandstone, cement etc. then; Then steel pipe 3 is extracted, stake point 2 is stayed in the ground; Also not during fixed moulding, the agitation pile frame is set up in the position of original pipeline sinking pile and is started working in pipeline sinking pile, and drive unit 7 connects driving shafts 6; Start drive unit 7; The blade 8 that is fixedly connected on the driving shaft 6 of agitation pile blends unconsolidated pipeline sinking pile, and the earth with periphery stirs again, when agitation pile is stirred to the precalculated position; Agitation pile withdraws from ground 1 from ground, thereby forms agitation pile; Owing in the original pipeline sinking pile stone etc. is arranged, the intensity of mixing the big agitation pile of the formed diameter in back with peripheral earth strengthens greatly, and promptly diameter has stone etc. greatly again; Therefore, pipeline sinking pile and agitation pile are combined the defective of having avoided them to exist separately, kept their unborn separately advantages again simultaneously, more produced their that all do not have separately, beyond thought effects, promptly produced synergy.

Secondly, just because of the present invention the two is combined, thereby can formerly beat pipeline sinking pile the time, to steel pipe 3 in, drop into building waste etc. through hopper 4, this is compliance with environmental protection requirements both, the intensity that has guaranteed again, and this is unaccommodated when independent pipeline sinking pile; Simultaneously; When beating pipeline sinking pile, owing to must not beat agitation pile during moulding in pipeline sinking pile, also owing to also need drop into cement in the process that agitation pile is beaten; Thereby when beating pipeline sinking pile, can reduce the cement input amount or even not drop into cement; Many input building wastes, thus under guaranteed strength and pile quality prerequisite, reduce cost, and this is huge cost savings for a work items.

In the very big mucky soil of water content, drive piles; Then can when beating pipeline sinking pile, mix a certain proportion of coarse aggregate material (aggregate chips earlier; Flyash, slag powders, building waste of pulverizing or the like); Under the situation of identical cement mixed weight, consolidation strength can be improved greatly, under same soil cement intensity requires, cement consumption can be saved greatly simultaneously.

Also have; For driving piles on the ground of filling in the sea to grow grain; Make full use of the pipeline sinking pile characteristics in the time of can formerly beating pipeline sinking pile, put into different coarse aggregate materials according to different depth, like this when beating agitation pile; Blade 8 can be put into different coarse aggregate materials with different depth and be mixed together stirring at the cement of different depth place and peripheral earth and feeding, makes stake demonstrate corresponding intensity at different depth.

Through a large amount of indoor Mix Ratio Test result, the high-moisture mucky soil after adding certain coarse aggregate cement as the cementing material situation under consolidation strength improve greatly.

Claims

1. immersed tube adds the job practices of castinplace pile, and its step is:

(1) in ground, squeezes into earlier pipeline sinking pile;

2. immersed tube according to claim 1 adds the job practices of castinplace pile, it is characterized in that reducing the cement input in the step (1) or not dropping into cement.

3. immersed tube according to claim 1 adds the job practices of castinplace pile, it is characterized in that adding in the step (1) building waste.