CN1632238A - Long spiral press pouring concrete lock pin combination pile and construction method thereof - Google Patents

Abstract

The present invention discloses a long spiral press pouring concrete lock pin combination pile and a construction method thereof. The long spiral press pouring concrete pile is inserted with a prefabricated pile core to form a composite pile. First, a long spiral hole drilling machine is used to drill hole; after the hole is reaching a designed depth, a concrete pump is started to pump the concrete to a drill core pipe through a feeding pipe, the drill is raised to the ground surface while pumping the concrete; the prefabricated pipe core is hoisted and is inserted into the concrete pile body to form a pile by weight and a pressurization equipment. The pile construction is fast in speed and high in efficiency, can penetrate through the hard soil layer that the prefabricated pile can not penetrate through, and has no vibration, noise and slurry pollution during making hole and pile, and can be constructed in the center of big city, and has no extruded soil when forming the pile, can prevent the bad influence generated to the adjacent pile when constructing, and has high pile quality. The pile body has higher bearing ability than the prefabricated pile for a lot of stratums.

Description

Long spiral press pouring concrete lock pin combination pile and job practices thereof

Technical field

The present invention relates to pile foundation and job practices thereof, especially long spiral press pouring concrete lock pin combination pile and the job practices thereof of building.

Background technology

In the prior art, the construction system that common long auger pump pressure in pipe castinplace pile is made up of full screw earth auger, concrete pump and forced concrete mixer, be widely used in the pile foundation construction, its construction sequence is: rig is in place to be bored into predetermined absolute altitude, in mixer, press given proportioning ready-mixed concrete in advance, by chute the concrete that stirs is dropped in the concrete pump hopper, start concrete pump concrete is pumped into drilling rod core pipe by feed-line, brill is carried on pumping of concrete limit, limit, up to face of land pile.

Long auger pump pressure in pipe perfusion piling method is that a kind of speed of application is fast, the stake of wide adaptability, and the pore-forming penetration capacity is strong, and penetrable hardpan directly is not more than the boulder bed of 60mm such as layer of sand, gravel layer and material.Do not produce vibration during the stake of pore-forming system, noiselessness, mud-less pollution, no soil compaction produces harmful effect to adjacent studs when avoiding constructing, and can construct below groundwater table.

But the stake of using this kind construction technology to form has a shortcoming that can't overcome, because boring and perfusion are finished simultaneously during the construction of stake, can only pour into fluidised form and superfluidity inserts, and formin concrete pile or CFG stake, pile strength can't further improve, the minority area is pressed into reinforcing cage after pile body forms, but because of reinforcing cage compression distance maximum behind the pile can only reach 12 meters, little for long stake effect.

Summary of the invention

Technical problem to be solved by this invention provides a kind of long spiral press pouring concrete lock pin combination pile and job practices thereof, improves long auger pump pressure in pipe pouring concrete pile pile quality, easy construction, and reliable in quality, with low cost.

For solving the problems of the technologies described above, the technical solution adopted in the present invention is: a kind of long spiral press pouring concrete lock pin combination pile is surrounded by prefabricated pile core in the pile body inside of being irritated the plain concrete that forms by long spiral press.

Described prefabricated pile core can be a kind of in prefabricated reinforced concrete hollow pile, prefabricated reinforced concrete solid pile, steel pipe pile or the stake of H shaped steel.

A kind of job practices of long spiral press pouring concrete lock pin combination pile may further comprise the steps successively:

A. at first with full screw earth auger boring, after boring arrives projected depth, start concrete pump concrete is pumped into drilling rod core pipe by feed-line, brill is carried up to ground in pumping of concrete limit, limit, the concrete pile body of formin;

B. before concrete initial set, lift by crane prefabricated pile core, be inserted into the pile body pile of plain concrete by deadweight and pressurized equipment.

Described prefabricated pile core can be a kind of in prefabricated reinforced concrete hollow pile, prefabricated reinforced concrete solid pile, steel pipe pile or the stake of H shaped steel.

The invention has the beneficial effects as follows:

1, speed of application is fast, efficient is high, and its speed of application can be suitable with the fastest static pressed pile of present speed of application.

2, its compliance is higher than static pressed pile far away, and the pore-forming penetration capacity is very strong, and the hardpan that penetrable preformed pile can't pass directly is not more than the boulder bed of 60mm etc. such as layer of sand, gravel layer and material.

3, in pore-forming and when stake system, do not produce vibration, noiselessness, mud-less pollution, and environment is had no adverse effects, and can construct at the center, metropolis.

4, do not have soil compaction during pile, when avoiding constructing adjacent studs is produced harmful effect, the pile quality height.

5, bearing capacity of pile height, having overcome long spiral pump pressure in pipe castinplace pile limited by its pile-formation process, pile body can't be lowered to the weak shortcoming of pile strength that reinforcing cage produces, this stake is not limited to original and uses as the rigidity composite foundation, and as providing the concrete drilling bored concrete pile of high-bearing capacity to use.Be higher than preformed pile for its bearing capacity of a lot of stratum.

Description of drawings

Fig. 1 is an auger boring guncreting working drawing of the present invention.

Fig. 2 is pressed into prefabricated reinforced concrete core stake figure in the plain concrete pile of the present invention.

Fig. 3 is a pile body sectional drawing behind the pile of the present invention.

Among the figure, 1: concrete pump; 2: the transmission and concrete transmission pipeline; 3: long screw drill rod; 4: long spiral transport power head; 5: stake machine mast; 6: stake machine chassis; 7: the prefabricated reinforced concrete lock pin; 8: stake core floating pile presser; 9: the pile body of plain concrete.

The specific embodiment

Below in conjunction with the drawings and specific embodiments the present invention is described in further detail:

As shown in Figure 3, long spiral press pouring concrete lock pin combination pile of the present invention is surrounded by prefabricated reinforced concrete core stake 7 in pile body 9 inside of being irritated the plain concrete that forms by long spiral press.

Described reinforced concrete core stake 7 can use prefabricated reinforced concrete hollow pile, prefabricated reinforced concrete solid pile, steel pipe pile or the stake of H shaped steel to replace.

Job practices of the present invention is as follows:

As shown in Figure 1, at first be installed in the long spiral transport power head that can on stake machine mast 5, slide on the machine chassis 64 and drive the long screw drill rods 3 arrival projected depth of in the stratum, hole, at the bottom of starting concrete pump 1 then and entering the hole by transmission and concrete transmission pipeline 2 and long screw drill rod 3 core pipe pumping coagulations, brill is carried on pumping of concrete limit, limit, forms a continuous plain concrete pile body 9 gradually in the rise hole bottom gradually along with long spiral transport power head 4 drives long screw drill rod 3.

As shown in Figure 2, lifting prefabricated reinforced concrete core stake 7 before concrete initial set, aim at plain concrete pile body 9 centers be shaped, the effect by deadweight and stake core floating pile presser 8 is inserted into plain concrete pile body 9 piles, forms long spiral press pouring concrete lock pin combination pile as shown in Figure 3.

Claims (4)

1, a kind of long spiral press pouring concrete lock pin combination pile is characterized in that, is surrounded by prefabricated pile core in the pile body inside of being irritated the plain concrete that forms by long spiral press.

2, long spiral press pouring concrete lock pin combination pile according to claim 1 is characterized in that described prefabricated pile core can be a kind of in prefabricated reinforced concrete hollow pile, prefabricated reinforced concrete solid pile, steel pipe pile or the stake of H shaped steel.

3, a kind of job practices of long spiral press pouring concrete lock pin combination pile is characterized in that may further comprise the steps successively:

A. at first with full screw earth auger boring, after boring arrives projected depth, start concrete pump concrete is pumped into drilling rod core pipe by feed-line, brill is carried up to ground in pumping of concrete limit, limit, the concrete pile body of formin;

B. before concrete initial set, lift by crane prefabricated pile core, be inserted into the pile body pile of plain concrete by deadweight and pressurized equipment.

4, the job practices of long spiral press pouring concrete lock pin combination pile according to claim 3 is characterized in that described prefabricated pile core can be the prefabricated reinforced concrete hollow pile, a kind of in prefabricated reinforced concrete solid pile, steel pipe pile or the stake of H shaped steel.

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