CN201074325Y

CN201074325Y - Pedestal pile suitable for foundation construction of high-rise buildings

Info

Publication number: CN201074325Y
Application number: CNU2007200132595U
Authority: CN
Inventors: 王国奋
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-07-12
Filing date: 2007-07-12
Publication date: 2008-06-18
Anticipated expiration: 2017-07-12

Abstract

The utility model discloses an enlarged toe pile for buildings, in particular to an immersed-tube precast reinforced concrete enlarged toe pile which is adaptable to foundation engineering of high-rise buildings. The utility model is structurally formed by integrally anchoring and connecting an upper segment precast prestressed pile body and a lower segment precast pile body via an upper cast-in-situ concrete base, the center of the base is coaxially same as the center of the pile body, the lower end of the lower segment precast pile body is provided with a cast-in-situ concrete base, the cross sections of the upper segment precast prestressed pile body and the lower segment precast pile body are round, and the cast-in-situ base is internally provided with radical ribs. The utility model can be adapted widely, utilization rate of strength of materials is obviously increased, the bearing ability of a single pile is higher, and the design desired effect of the immersed-tube enlarged toe pile is easy to be achieved, thereby the utility model has the advantages of simple structure, low costs and convenient construction.

Description

A kind of suitable Tall Building Foundation construction expanded bore pile

Technical field

The utility model relates to a kind of expanded bore pile for building, particularly relates to a kind of suitable Tall Building Foundation construction expanded bore pile.

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.What wherein be most widely used is immersed tube bored expanded bore pile, and this pile body is a cast-in-situ steel concrete, and pile crown is prefabricated; 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.The patent No. is 200620093074.5 to have solved above-mentioned technical problem, but in actual application, between adjacent pile body, be provided with joint bar owing to it, cause the cost of expanded bore pile to increase, and construction is difficulty very, though it has effect preferably, in actual application,, cost height, constructional difficulties be restricted owing to making its popularization.

The utility model content

The utility model is exactly in order to solve the problems of the technologies described above, and provide a kind of scope of application wide, obviously improve strength of materials utilization rate, bearing capacity of single pile is higher, with low cost, the suitable Tall Building Foundation construction expanded bore pile of easy construction.

In order to solve the problems of the technologies described above, the utility model is achieved in that a kind of suitable Tall Building Foundation construction expanded bore pile, it is to be made of following structure: by last Cast-in-place concrete base precast prestressed pile body of epimere and the anchoring of hypomere precast pile are fused, 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 the precast prestressed pile body of epimere center, the cross section of precast prestressed pile body of epimere and hypomere precast pile is circular, is provided with the radiation muscle in the cast-in-situ base.

Described vertical section of going up Cast-in-place concrete base and Cast-in-place concrete base be big down little trapezoidal.

Of the present utility model a bit and effect as follows:

The utility model adopts two joint pile bodies and two expansion bases, because upper bed-plate produces good influence to the performance of lower bottom base bearing capacity, 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, be suitable for the Tall Building Foundation construction simultaneously.The utility model satisfies the needs of construction work better, and the utility model is simple in structure, and is with low cost, is convenient to construction.

Description of drawings

Fig. 1 is the main TV structure schematic diagram of a kind of suitable Tall Building Foundation construction of the utility model with expanded bore pile.

Among the figure: 1, Cast-in-place concrete base; 2, go up the Cast-in-place concrete base; 3, hypomere precast pile; 4, the precast prestressed pile body of epimere; 5, radiation 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.

Embodiment one

As shown in Figure 1 be the main TV structure schematic diagram of the utility model precast pile Cast-in-place concrete base, by last Cast-in-place concrete base 2 precast prestressed pile body 4 of epimere and 3 anchorings of hypomere precast pile are fused, 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 the precast prestressed pile body of epimere 4 centers, and the cross section of precast prestressed pile body 4 of epimere and hypomere precast pile 3 is circular.The vertical section of last Cast-in-place concrete base 2 and Cast-in-place concrete base 1 is down big and little trapezoidally, is provided with radiation muscle 5 in the cast-in-situ base 1.The job practices of present embodiment can be constructed according to common process.

Claims

1. a suitable Tall Building Foundation is constructed and is used expanded bore pile, it is characterized in that it is to be made of following structure: precast prestressed pile body of epimere (4) and hypomere precast pile (3) anchoring are fused by last Cast-in-place concrete base (2), 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 the precast prestressed pile body of epimere (4) center, the cross section of precast prestressed pile body of epimere (4) and hypomere precast pile (3) is circular, is provided with radiation muscle (5) in the cast-in-situ base (1).

2. expanded bore pile use in suitable Tall Building Foundation construction according to claim 1, it is characterized in that described vertical section of going up Cast-in-place concrete base (2) and Cast-in-place concrete base (1) is greatly upward little down trapezoidal.