CN201137095Y - Pipe caisson prefabricated club-footed pile for high-rise building - Google Patents

Abstract

The utility model relates to an immersed tube precast belled pile adapted for high-rise building foundation engineering, which structurally includes that a steel pipe is arranged on the outside of an upper section precast prestressed pile body, a lower section cast-in-place pile body is integrally anchored with the upper section precast prestressed pile body by an upper cast-in-place pile concrete base, cross stabilizing reinforcements are arranged at the joint of the upper section precast prestressed pile body and the lower section cast-in-place pile body, lower inserted reinforcements of the upper section precast pile body are disposed in the upper section precast prestressed pile body, the inserted reinforcements of the lower section cast-in-place pile body are generally installed and in lap connection with lower inserted reinforcements of the upper section precast pile body embedded at the lower end of the upper section precast prestressed pile body, the lower end of the lower section cast-in-place pile body is provided with a cast-in-place concrete base, a cross branch is arranged on the lower section cast-in-place pile body, and radial reinforcements are installed in the upper cast-in-place base and the cast-in-place base. The immersed tube precast belled pile adapted for high-rise building foundation engineering has wide scope of application, remarkably improves material strength utilization ratio, and has higher single pile bearing capacity and high stability.

Description

The immersed tube prefabricated expanded bore pile of a kind of suitable highrise building

Technical field

The utility model relates to a kind of expanded bore pile for building, particularly relates to a kind ofly being applicable in the highrise building foundation engineering and being applicable to immersed tube prefabricated expanded bore pile in the building of other any ground soil properties, safe class.

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.Simultaneously, pile body of the prior art junction in use exists bearing capacity and anti-impact force is weak, the problem of steadiness difference.

The utility model content

The problem that the utility model exists at prior art, and provide a kind of scope of application wide, obviously improve strength of materials utilization rate, bearing capacity of single pile is higher and reach the ram-expanded pile of the Expected Results of design, has solved pile body junction bearing capacity and anti-impact force is weak, the problem of steadiness difference in use.

The technical scheme that the utility model technical solution problem is adopted is: the outer setting steel pipe of the precast prestressed pile body of epimere, the cast-in-place pile body of hypomere fuses precast prestressed pile body of epimere and the cast-in-place pile body anchoring of hypomere by last Cast-in-place concrete base, the internal connection of precast prestressed pile body of epimere and the cast-in-place pile body of hypomere is provided with the firm muscle of chiasma type, be provided with the following joint bar of epimere precast pile in the precast prestressed pile body of epimere, the joint bar of the cast-in-place pile body of the cast-in-place pile body of hypomere be usually be provided with and with the following joint bar overlap joint of the pre-buried epimere precast pile in the precast prestressed pile body of epimere lower end, the lower end of the cast-in-place pile body of hypomere is provided with the Cast-in-place concrete base, the hypomere present walling pile is provided with cross branch on one's body, is provided with the radiation muscle in last Cast-in-place concrete base and the Cast-in-place concrete base.

The center of described Cast-in-place concrete base and last Cast-in-place concrete base is coaxial with the center of precast prestressed pile body of epimere and the cast-in-place pile body of hypomere.

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 suitable highrise building of the present utility model with precast pile.

Fig. 2 is the A-A sectional structure schematic diagram of Fig. 1.

Among the figure: 1, Cast-in-place concrete base; 2, go up the Cast-in-place concrete base; 3, the precast prestressed pile body of epimere; 4, the following joint bar of epimere precast pile; 5, the joint bar of cast-in-place pile body; 6, cross branch; 7, the cast-in-place pile body of hypomere; 8, radiation muscle, 9, firm muscle.

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.

As shown in Figure 1, the epimere pile body is the outer setting steel pipe of the precast prestressed pile body 3 of epimere, between the precast prestressed pile body 3 of steel pipe and epimere the firmware cement paste is set, the hypomere pile body is the cast-in-place pile body 7 of hypomere, by last Cast-in-place concrete base 2 precast prestressed pile body 3 of epimere and cast-in-place pile body 7 anchorings of hypomere are fused, the internal connection of precast prestressed pile body 3 of epimere and the cast-in-place pile body 7 of hypomere is provided with the firm muscle 9 of chiasma type, be provided with the following joint bar 4 of epimere precast pile in the precast prestressed pile body 3 of epimere, the joint bar 5 of the cast-in-place pile body of the cast-in-place pile body 7 of hypomere be usually be provided with and with following joint bar 4 overlap joints of the pre-buried epimere precast pile in the precast prestressed pile body of epimere 3 lower ends, the lower end of the cast-in-place pile body 7 of hypomere is provided with Cast-in-place concrete base 1, and the cast-in-place pile body 7 of hypomere is provided with to increasing the cross branch 6 of frictional resistance between pile body and the pan soil.Cross as shown in Figure 2 branch 6 can adopt YEJ600 type hydraulic pressure to prop up disc shaping machine to extrude crossly, and cast-in-situ steel concrete gets final product again; Perhaps make the scraggly surface of external surface form of the cast-in-place pile body 7 of its hypomere with the soil compaction method for identical purpose, can also be provided with two-stage or multistage prefabricated or cast-in-place pile body as required in the upper end of the precast prestressed pile body 3 of epimere, be provided with radiation muscle 8 in last Cast-in-place concrete base 2 and the Cast-in-place concrete base 1.

The shape of Cast-in-place concrete base 1 and last Cast-in-place concrete base 2 is not limit, and its vertical section is a kind of in the up-small and down-big trapezoidal or sharpening triangle.

Claims (3)

1, the immersed tube prefabricated expanded bore pile of a kind of suitable highrise building, it is characterized in that it is to be made of following structure: the outer setting steel pipe of the precast prestressed pile body of epimere (3), the cast-in-place pile body of hypomere (7) fuses precast prestressed pile body of epimere (3) and the cast-in-place pile body of hypomere (7) anchoring by last Cast-in-place concrete base (2), the internal connection of precast prestressed pile body of epimere (3) and the cast-in-place pile body of hypomere (7) is provided with the firm muscle of chiasma type (9), be provided with the following joint bar (4) of epimere precast pile in the precast prestressed pile body of epimere (3), the joint bar (5) of the cast-in-place pile body of the cast-in-place pile body of hypomere (7) be usually be provided with and with following joint bar (4) overlap joint of the pre-buried epimere precast pile in the precast prestressed pile body of epimere (3) lower end, the lower end of the cast-in-place pile body of hypomere (7) is provided with Cast-in-place concrete base (1), the cast-in-place pile body of hypomere (7) is provided with cross branch (6), is provided with radiation muscle (8) in last Cast-in-place concrete base (2) and the Cast-in-place concrete base (1).

2, the immersed tube prefabricated expanded bore pile of a kind of suitable highrise building according to claim 1 is characterized in that the center of described Cast-in-place concrete base (1) and last Cast-in-place concrete base (2) is coaxial with the center of precast prestressed pile body of epimere (3) and the cast-in-place pile body of hypomere (7).

3, the immersed tube prefabricated expanded bore pile of a kind of suitable highrise building according to claim 1 is characterized in that between precast prestressed pile body of described epimere (3) and the steel pipe firmware being set.

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