CN201074328Y

CN201074328Y - Pedestal pile for building foundation construction

Info

Publication number: CN201074328Y
Application number: CNU2007200132538U
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 enlarged toe pile which is adaptable to building foundation construction of high-rise buildings. The utility model is structurally formed by integrally anchoring and connecting an upper segment precast prestessed pile body (4) and a lower segment precast pile body (3) via an upper cast-in-situ concrete base (2), wherein the lower end of the lower segment precast pile body (3) is provided with a cast-in-situ concrete base (1), the centers of the upper cast-in-situ concrete base (2) and the cast-in-situ concrete base (1) are coaxially same as the centers of the lower segment precast pile body (3) and the upper segment precast prestessed pile body (4), and the cross sections of the upper segment precast prestessed pile body (4) and the lower segment precast pile body (3) are round. 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 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

The construction foundation working expanded bore pile

Affiliated technical field

The utility model relates to a kind of expanded bore pile for building, particularly relates to a kind of construction foundation working expanded bore pile that is applicable to highrise building.

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 200620092806.9 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 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, with low cost, the construction foundation working expanded bore pile of easy construction.

In order to solve the problems of the technologies described above, the utility model is achieved in that the construction foundation working 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, and the cross section of precast prestressed pile body of epimere and hypomere precast pile is circular.

Advantage of the present utility model and effect are 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 a main TV structure schematic diagram 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, the precast prestressed pile body of epimere.

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 be main TV structure schematic diagram of the present utility model, 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 job practices of present embodiment can be constructed according to common process.

Claims

1. construction foundation working 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, and the cross section of precast prestressed pile body of epimere (4) and hypomere precast pile (3) is circular.