CN201087407Y - Anti-impact pedestal pile for building foundation construction - Google Patents

Abstract

The utility model relates to an impact resistance building foundation enlarged pile applicable for the construction projects of high-rise building foundation, the enlarged pile has the structure that: the upper part is provided with steel pipes, and concrete and lower steel dowels are arranged inside the steel pipes; upper steel dowels and embedded lower steel dowels are arranged inside a lower precast pile body; the upper steel dowels of the lower precast pile body are connected with the lower steel dowels of an upper steel pipe, and then the upper steel pipe is anchored together with the lower precast pile body through an upper site cast concrete base; the center of the base shares the same shaft with the center of the pile body; the lower end of the lower precast pile body is provided with the site cast concrete base; and the cross-sections of the upper steel pipe and the lower precast pile body are round in shape. The utility model has the advantages of wide application scope, marked improvement of material strength utilization, and enhancement of carrying capacity of the pile body.

Description

Anti-impact force construction foundation working expanded bore pile

Technical field

The utility model relates to a kind of expanded bore pile for building, particularly relates to a kind of anti-impact force construction foundation working expanded bore pile that is applicable in the highrise building foundation engineering.

Background technology

The pile foundation engineering that is used for the high building lot of highrise building and requirement for bearing capacity at present generally adopts three kinds of ram-expanded pile, preformed pile and large diameter bored piles.Wherein the large diameter bored pile bearing capacity is the highest, but its involve great expense, work efficiency is low, and is and seriously polluted during construction; The quality of preformed pile is good, bearing capacity is also higher, but the cost of preformed pile is also high at present, generally is used for the higher building of safe class.What wherein be most widely used is ram-expanded pile, and this pile body is a cast-in-situ steel concrete, and pile crown is prefabricated; When executing, earlier the prefabricated pile crown of immersed tube is imbedded the hardpan in the ground, irritate concrete cast pile then; But because the soil property age difference that the earth's crust forms, soft foundation is soft usually with the increase of the crust layer degree of depth, hardpan is alternately state, like this when continuous piling construction, after execute stake and can produce extruding soil layer, the stake that will have influence on perfusion formerly and not solidify fully as yet, especially especially serious at the intersection of weak soil layer and hardpan, broken pile often appears, necking, thereby cause having approximately can't meet the quality requirement of tube-sinking cast-in-situ pile about 20%, force the designer to reduce the standard of bearing capacity of single pile, cause down stake to be gathered, cause soil body gross distortion, even jeopardize the quality of pile body; This another shortcoming is that bearing capacity is low, be to increase bearing capacity, the general way that adopts at the bottom of after irritating concrete cast pile body, adding companding, but because of its utilization add companding at the bottom of mode make the uncertain and standard of its shape size, its application is limited to.And, in use, the bearing capacity of pile body and anti-impact force a little less than.

The utility model content

The utility model provides a kind of construction foundation working expanded bore pile at the problem that prior art exists, and has solved in the prior art that the expanded bore pile scope of application is little, bearing capacity difference and the low problem of stock utilization.

The technical scheme that the utility model technical solution problem is adopted is: epimere is set to steel pipe, the inside of steel pipe is provided with concrete and following joint bar, be provided with joint bar in the hypomere precast pile and bury joint bar in advance, the last joint bar of hypomere precast pile overlaps mutually with the following joint bar of epimere steel pipe, by last Cast-in-place concrete base epimere steel pipe and the anchoring of hypomere precast pile are fused again, the lower end of hypomere precast pile is provided with the Cast-in-place concrete base, the center of Cast-in-place concrete base and Cast-in-place concrete base is coaxial with hypomere precast pile and epimere steel pipe center, and the cross section of epimere steel pipe and hypomere precast pile is circular.

Concrete cross section is trapezoidal in the described epimere steel pipe.

The utility model adopts the more piece pile body and expands base more than two, because the performance to the lower bottom base bearing capacity of upper bed-plate produces good influence, being provided with the performance of each section pile body frictional resistance of each base is favourable, make stake be in the state work down of economical rationality all the time, obviously improve the bearing capacity of single pile and the utilization rate of the strength of materials, reach the Expected Results of design easily, satisfy the needs of construction work better, no matter simultaneously applied widely is high level or low-rise building, safe class and ground soil property situation can both be combined into the immersed tube prefabricated multistage under-reamed pile that is complementary with it.

Description of drawings

Fig. 1 is the main TV structure schematic diagram of precast pile of the present utility model.

Among the figure: 1, Cast-in-place concrete base; 2, go up the Cast-in-place concrete base; 3, hypomere precast pile; 4, epimere steel pipe; 5, concrete; 6, the following joint bar of epimere steel pipe; 9, the last joint bar of hypomere precast pile; 10, bury joint bar in advance.

The specific embodiment

Embodiment of the present utility model is described in detail in conjunction with the accompanying drawings, but protection domain of the present utility model is not limit by embodiment.

Embodiment

As shown in Figure 1 be the main TV structure schematic diagram of the utility model precast pile Cast-in-place concrete base, epimere is set to steel pipe, the inside of epimere steel pipe 4 is provided with concrete 5 and following joint bar 6, the cross section that concrete is filled in the steel pipe is trapezoidal; Be provided with joint bar 9 in the hypomere precast pile 3 and bury joint bar 10 in advance, the last joint bar 9 of hypomere precast pile overlaps mutually with the following joint bar 6 of epimere steel pipe, by last Cast-in-place concrete base 2 epimere steel pipe 4 and 3 anchorings of hypomere precast pile are fused again, the lower end of hypomere precast pile 3 is provided with Cast-in-place concrete base 1, the center of Cast-in-place concrete base 2 and Cast-in-place concrete base 1 is coaxial with hypomere precast pile 3 and epimere steel pipe 4 centers, and the cross section of epimere precast pile 4 and hypomere precast pile 3 is circular.The job practices of present embodiment can be constructed according to common process.

Claims (3)

1. anti-impact force construction foundation working expanded bore pile, it is characterized in that it is to be made of following structure: epimere is set to steel pipe (4), the inside of epimere steel pipe (4) is provided with concrete and following joint bar (6), be provided with joint bar (9) in the hypomere precast pile (3) and bury joint bar (10) in advance, the last joint bar (9) of hypomere precast pile overlaps mutually with the following joint bar (6) of epimere steel pipe, by last Cast-in-place concrete base (2) epimere precast pile (4) and hypomere precast pile (3) anchoring are fused again, the lower end of hypomere precast pile (3) is provided with Cast-in-place concrete base (1), the center of Cast-in-place concrete base (2) and Cast-in-place concrete base (1) is coaxial with hypomere precast pile (3) and epimere steel pipe (4) center, and the cross section of epimere steel pipe (4) and hypomere precast pile (3) is circular.

2. anti-impact force construction foundation working expanded bore pile according to claim 1 is characterized in that concrete cross section is trapezoidal in the described epimere steel pipe.

3. anti-impact force construction foundation working expanded bore pile according to claim 1 is characterized in that being set at least two joint pile bodies.

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