CN201314042Y

CN201314042Y - Expansion-type pile foundation

Info

Publication number: CN201314042Y
Application number: CNU2008202144464U
Authority: CN
Inventors: 杨成斌; 吴春萍
Original assignee: Anhui Donghe Building Energy Saving Engineering Research Co Ltd; ZHEJIANG DONGYANG THIRD CONSTRUCTION ENGINEERING Co Ltd; Geotechnical Engineering Investigation And Design Institute Of Hefei University Of Technology
Current assignee: Anhui Donghe Building Energy Saving Engineering Research Co Ltd; ZHEJIANG DONGYANG THIRD CONSTRUCTION ENGINEERING Co Ltd; Geotechnical Engineering Investigation And Design Institute Of Hefei University Of Technology
Priority date: 2008-12-04
Filing date: 2008-12-04
Publication date: 2009-09-23
Anticipated expiration: 2018-12-04

Abstract

The utility model belongs to the technical field of building and bridge engineering, and particularly relates to an expansion-type pile foundation. The expansion-type pile foundation comprises a pile body; a plurality of pile wings are arranged on the lower side of the pile body, wherein the extension direction of the pile wings is vertical to the axis of the pile body; and the pile wings are uniformly arranged around the pile body in the spoke shape from the axis center of the pile body to outside. According to the technical scheme, the local bases in wing shape, called as pile wings in the utility model, are uniformly arranged around the bottom of the pile body. On one hand, the expansion-type pile foundation can basically keep the stability and the bearing capacity of a pile with an integral base and, on the other hand, can facilitate the hole expansion. Accordingly, the expansion-type pile foundation has less damage to soil layer to prevent collapse of the soil layer, thereby lowering the construction difficulty and reducing the construction cost.

Description

A kind of expansion type pile foundation

Technical field

The utility model belongs to the stake technical field in the civil engineering, is specifically related to a kind of expansion type pile foundation.

Background technology

The base of the stake in the existing building engineering is generally all made whole frustum, to increase the stability and the bearing capacity of stake, as shown in Figure 1, 2.Yet the base of above-mentioned shape also is not suitable for sand, rubble class soil, loose banketing and the soil property of self-bearing capacity deficiency such as cranny development decayed rock, main cause is, when reaming is carried out in the bottom of stake, because the soil property of above-mentioned soil is comparatively loose, cohesion between the particle a little less than, the soil layer that expands the top, hole of end gained easily caves in, and can not effectively support reaming, thereby make difficulty of construction strengthen, construction cost rises.

Summary of the invention

The purpose of this utility model provides a kind of expansion type pile foundation, and it can be applied to the soil property of self-supporting ability deficiency preferably, is convenient to construction and simple structure.

For achieving the above object, the utility model has adopted following technical scheme: a kind of expansion type pile foundation, comprise pile body, and the downside of pile body is provided with a wing, the axis of bearing of trend and the pile body of the stake wing is perpendicular, a wing from the axle center of pile body outwards be spoke-like be arranged on equably pile body around.

As shown from the above technical solution, the base of pile body is not that design is as a whole in the utility model, but be designed to from the axle center of pile body outwards be spoke-like be arranged on equably pile body around, the local base of a plurality of Zhi Yizhuan of being also promptly is set around the pile body bottom equably, and this local base is called a wing in the utility model.The stability and the bearing capacity of the stake when above-mentioned design has kept adopting unsplit bedplate on the one hand basically, also made things convenient for the reaming construction at the stake end on the other hand, promptly do not need the soil layer around at the bottom of the stake is all emptied yet, but only need empty and get final product a soil layer at wing place is set, destructive less to soil layer when therefore this design makes construction, the soil layer of construction place is difficult for caving in, thereby has also reduced difficulty of construction, has reduced construction cost.

Description of drawings

Fig. 1 is the structural representation of existing pile body base;

Fig. 2 is the vertical view of Fig. 1;

Fig. 3,5, the 7th, structural representation of the present utility model;

Fig. 4 is the vertical view of Fig. 3;

Fig. 6 is the vertical view of Fig. 5;

Fig. 8 is the vertical view of Fig. 7;

Fig. 9 is the A-A sectional view of Fig. 3.

The specific embodiment

Shown in Fig. 3～8, a kind of expansion type pile foundation comprises pile body 10, and the downside of pile body 10 is provided with a wing 20, and the axis of bearing of trend and the pile body 10 of the stake wing 20 is perpendicular, a wing 20 from the axle center of pile body 10 outwards be spoke-like be arranged on equably pile body 10 around.

By preceding described, for sand, rubble class soil, loose banketing and the soil layer of the self-bearing capacity deficiencies such as decayed rock of cranny development, owing to be difficult for adopting the monolithic base, therefore all do not expand base during practice of construction, and only adopt pile body 10 itself to support, increased the quantity that is provided with of pile body 10 thus.Because the utility model is provided with the stake wing 20 that is suitable for constructing in the soil layer of self-bearing capacity deficiency around the bottom of pile body 10, therefore the stability and the bearing value of stake have been increased substantially, correspondingly reduced the quantity that is provided with of pile body 10 thus, thereby significantly reduced construction cost, and improved speed of application.

The quantity of the stake wing 20 can be set to a plurality of, shown in Fig. 4,6,8, for isogonism distributes, also be that the angle of each wing 20 between the projection on the horizontal plane all equates between each wing 20, as preferred version of the present utility model, the described stake wing 20 is set to 3～8.

The quantity of the stake wing 20 is too much, then causes the soil layer of self-bearing capacity deficiency to cave in work progress easily; During negligible amounts, contribute less to the stability of pile body 10 and the raising of bearing value.When the quantity of the stake wing 20 is 3～8, less to the soil layer influence of being constructed on the one hand, be convenient to construction and be easy to reaming, can increase substantially the stability and the bearing value of pile body 10 on the other hand, benefit is than higher.

As the further preferred version of the utility model, the described stake wing 20 is set to 4～6.

The shape of the stake wing 20 has multiple choices, and such as cylindric or prism-shaped, as preferred version of the present utility model, shown in Fig. 3,5,7,9, the described stake wing 20 axially is inverted bracket shape from top to bottom along pile body 10.

The stake wing 20 is set to inverted bracket shape, helps improving the stability and the bearing value of body 10, and be convenient to construction, be easy to be shaped.

As the further preferred version of the utility model, the described stake wing 20 is concordant mutually with the bottom face of pile body 10.

The stake wing 20 is concordant mutually with the bottom face of pile body 10, helps monitoring and control in the work progress, has improved speed of application and efficiency of construction accordingly.

Claims

1, a kind of expansion type pile foundation, comprise pile body (10), it is characterized in that: the downside of pile body (10) is provided with a wing (20), the axis of bearing of trend and the pile body (10) of the stake wing (20) is perpendicular, a wing (20) from the axle center of pile body (10) outwards be spoke-like be arranged on equably pile body (10) around.

2, expansion type pile foundation according to claim 1 is characterized in that: the described stake wing (20) is set to 3～8.

3, expansion type pile foundation according to claim 1 and 2 is characterized in that: the described stake wing (20) axially is inverted bracket shape from top to bottom along pile body (10).

4, expansion type pile foundation according to claim 2 is characterized in that: the described stake wing (20) is set to 4～6.

5, expansion type pile foundation according to claim 3 is characterized in that: the described stake wing (20) is concordant mutually with the bottom face of pile body (10).