CN201722684U

CN201722684U - Compound pile

Info

Publication number: CN201722684U
Application number: CN2010202489734U
Authority: CN
Inventors: 李存良; 刘睿; 贾新发; 缑百强; 赵文英
Original assignee: Shaanxi Construction Engineering Group Mechanized Construction Co Ltd
Current assignee: Shaanxi Construction Engineering Group Mechanized Construction Co Ltd
Priority date: 2010-07-06
Filing date: 2010-07-06
Publication date: 2011-01-26
Anticipated expiration: 2020-07-06

Abstract

The utility model provides a compound pile. The compound pile comprises a cement mixing pile and a concrete filling pile, wherein the cement mixing pile surrounds the concrete filling pile in the radial direction. The compound pile is formed by arranging the cement mixing pile at the periphery of the concrete filling pile. The compound pile can be applied to a soil structure with a soft flow plastic layer, so that concrete filling fullness coefficient is low and the compound pile has high carrying capacity.

Description

A kind of compound pile

Technical field

The utility model relates to building field, particularly relates to the building foundation engineering field.

Background technology

Revolve and scrape out hole technology surplus the application in loess area existing ten year, because of its mechanization degree height, advantage such as speed of fulfiling hole is fast, verticality good, the side friction of stake is big, this technology has obtained using rapidly and widely.But in using, engineering also run into some problems, see that as perforate sand or perforate are that plastic flow is moulded formation conditions such as layer, local burning into sand layer, cause problems such as boring difficulty, hole wall collapse, concrete spouting fullness coefficient be bigger than normal, does not still have and clearly effectively consolidate the wall measure and solve.

The utility model content

The purpose of this utility model provides a kind of compound pile, to solve the problems of the technologies described above.

To achieve these goals, the utility model adopts following technical scheme:

A kind of compound pile comprises cement mixing method and cast-in-place concrete pile, and described cement mixing method is radially surrounding described cast-in-place concrete pile.

Described cement mixing method comprises at least two.

Described cement mixing method comprises 7, and these 7 cement mixing methods are distributed in described cast-in-place concrete pile periphery.

The diameter of described cast-in-place concrete pile is 700mm, and the diameter of described cement mixing method is 500mm, the center 550mm of the center to center distance cast-in-place concrete pile of described cement mixing method.

The length of described cast-in-place concrete pile is long than the length of cement mixing method.

Compared with prior art, the utility model forms a kind of compound pile by in the cast-in-place concrete pile periphery cement mixing method being set, this kind compound pile can be applied to have plastic flow and mould in the soil structure of layer, the supporting capacity height of little and this compound pile of concrete spouting fullness coefficient.

Description of drawings

Fig. 1 is the structural representation of embodiment 1 compound pile;

Fig. 2 is the sectional view of Fig. 1 along the A-A line;

Fig. 3 is the structural representation of embodiment 2 compound piles;

Fig. 4 is the sectional view of Fig. 3 along the B-B line.

The specific embodiment

Below in conjunction with accompanying drawing the utility model is done and to be described in further detail.

See also shown in Figure 1ly, a kind of compound pile of the utility model comprises cement mixing method 1 and cast-in-place concrete pile 2, and described cement mixing method 1 surrounds cast-in-place concrete pile 2 diametrically.

Embodiment 1

See also Figure 1 and Figure 2,2 footpaths of cast-in-place concrete pile are 700mm in the present embodiment, evenly lay 7 along 2 week of cast-in-place concrete pile

Cement mixing method 1, overlap joint 50mm, 1 long process to plastic flow of cement mixing method are moulded the following 1m of layer place, cement mixing method 1 center to center distance cast-in-place concrete pile 2 center 550mm.Cement mixing method 1 pile body cement parameter is 5%～7%, and promptly every meter long cement consumption of stake is about 35kg.During construction, 7 cement mixing methods 1 that are shaped earlier, treat that it solidifies after, rotary digging drilling hole pours into then and forms cast-in-place concrete pile 2, the length of cast-in-place concrete pile 2 is long than the length of cement mixing method 1, a kind of compound pile of the utility model just completes like this.

Embodiment 2

See also Fig. 3 and shown in Figure 4,2 footpaths of cast-in-place concrete pile are 700mm in the present embodiment, 1 of 2 Zhou Bushe of cast-in-place concrete pile

Cement mixing method

1,1 long process to plastic flow of cement mixing method are moulded the following 1m of layer place.Cement mixing method 1 pile body cement parameter is 5%～7%.During construction, first shaping cement mixing method 1, treat that it solidifies after, pour into formation then at cement mixing method 1 center rotary digging drilling hole Cast-in-place concrete pile 2, the length of cast-in-place concrete pile 2 is long than the length of cement mixing method 1, a kind of compound pile of the utility model just completes like this.

Table 1, indoor cement soil body compression test

Annotate: the cement-soil test block (70.7 * 70.7 * 70.7, unit: mm), cement mixing content 7%.

As can be seen from Table 1, the compressive strength of cement mixing method after 1 seven days reaches more than the 400KPa, can carry out rotary digging drilling hole and situation that hole wall can not occur subsiding, pour into then forming cast-in-place concrete pile 2, the concrete spouting fullness coefficient reduces before.

A kind of compound pile of the utility model is around 2 holes of cast-in-place concrete pile of intending pore-forming, with the host of cement as curing compound, by the deep mixer tool, curing compound and foundation soil are forced to stir, weak soil is hardened become to have the cement mixing method 1 of globality, water stability and certain intensity, the effect that play strengthening soft foundation, improves pile body frictional resistance; Rotary digging drilling hole forms cast-in-place concrete pile 2 in cement mixing method 1 then, pore-forming smoothly and can be applied to and have plastic flow and mould in the soil structure of layer, the bearing capacity of the cast-in-place concrete pile of the compound pile after the shaping before also improves greatly.

Claims

1. compound pile, it is characterized in that: comprise cement mixing method (1) and cast-in-place concrete pile (2), described cement mixing method (1) is radially surrounding described cast-in-place concrete pile (2).

2. compound pile according to claim 1, it is characterized in that: described cement mixing method (1) comprises at least two.

3. compound pile according to claim 1, it is characterized in that: described cement mixing method (1) comprises 7, these 7 cement mixing methods (1) are distributed in described cast-in-place concrete pile (2) periphery.

4. as compound pile as described in the claim 3, it is characterized in that: the diameter of described cast-in-place concrete pile (2) is 700mm, the diameter of described cement mixing method (1) is 500mm, the center 550mm of the center to center distance cast-in-place concrete pile (2) of described cement mixing method (1).

5. as compound pile as described in the claim 4, it is characterized in that: the length of described cast-in-place concrete pile (2) is long than the length of cement mixing method (1).