CN101220595A

CN101220595A - Application method of novel post-tensioned pre-stress soil blocking pile

Info

Publication number: CN101220595A
Application number: CNA2008100260037A
Authority: CN
Inventors: 丁仕辉; 陆岸典
Original assignee: Guangdong No 2 Hydropower Engineering Co Ltd
Current assignee: Guangdong No 2 Hydropower Engineering Co Ltd
Priority date: 2008-01-24
Filing date: 2008-01-24
Publication date: 2008-07-16

Abstract

A novel application method of post-tensioned prestressing retaining pile is characterized in that after getting rid of a distance sleeve, the end of a bond-free stranded wire of the retaining pile structure is connected with a metal anchor head which is formed by squeezing and connecting a metal sleeve and the bond-free stranded wire without distance sleeve; the bond-free stranded wire in the retaining pile is isolated by the distance sleeve and cement freestone concrete; the whole stranded wire in the sleeve is packed by the cement freestone concrete; the bond-free stranded wire is colligated on a constructional steel bar cage and is combined with pouring concrete to form a concrete retaining pile after being arranged in a hole; when reaching the designed tension intensity value, the concrete enforces prestressing force to the retaining pile and uses a special anchor device for anchoring so as to improve the soil resisting ability of the retaining pile. The obvious progress and beneficial effects lie in improving the reinforcement arrangement of the concrete retaining pile, reducing the configuration of ordinary bearing steel bars in the retaining pile by using high-intensity stranded wire, thus greatly enhancing the soil resistance ability of the retaining pile to a large extent without increasing the structure size and achieving the purpose of reducing engineering cost and constructing conveniently.

Description

The application process of novel post-tensioned pre-stress soil blocking pile

Technical field

The present invention relates to shelves soil stake, the particularly application process of novel post-tensioned pre-stress soil blocking pile in the civil engineering.

Background technology

In known technology, use steel concrete soil blocking pile carries out side slope or pattern foundation pit supporting structure is a kind of supporting method commonly used, its principle is a bending resistance of utilizing the steel concrete soil blocking pile to provide, resists the soil pressure of side slope or foundation ditch, reaches the engineering purpose of side slope and foundation ditch periphery soil stabilization.

The steel concrete soil blocking pile is made up of reinforcing bar and concrete, and the soil blocking pile of cast in situs moulding can be divided into mechanical hole building stake and hand excavated pile.The mud off pore-forming is adopted in machinery pore-creating more, pore-creating to the projected depth clear hole, put reinforcing cage, downcomer concreting pile; Manually digging hole adopts pea gravel concreten retaining wall pore-forming more, to the projected depth clear hole, put reinforcing cage, concreting pile, treat that concrete reaches design strength and requires after, just can come into operation.The steel concrete soil blocking pile of the cast in situs moulding of this long-term extensive use, its weak point are that the reinforced steel bar strength of use is restricted, and often need to expend a large amount of steel concrete and satisfy designing requirement.

Summary of the invention

Purpose of the present invention is intended to overcome the deficiencies in the prior art and a kind of application process that reduces the novel post-tensioned pre-stress soil blocking pile of engineering cost, convenient construction is provided.

The object of the present invention is achieved like this: a kind of application process of novel post-tensioned pre-stress soil blocking pile comprises cement bonded sand stone concrete 1, distributing bar cage 2, steel strand support 3, no bonding steel strand 4, stake substrate anchor head 5, stake top anchorage head 6, no bonding steel wire bundle 7, reinforcing cage stirrup 8, the vertical muscle 9 of reinforcing cage, steel strand separation sleeve 10, steel wire 11; It is characterized in that, be connected with metal anchor head 5 after no bonding steel strand 4 ends of soil blocking pile structure remove separation sleeve, it is to be formed by connecting by metallic sheath and the steel strand extruding of removing separation sleeve; No bonding steel strand 4 in the soil blocking pile use steel strand separation sleeve 10 that itself and cement bonded sand stone concrete 1 are isolated, steel strand total length cement-free sand-stone concrete 1 bonds in the cover, do not have bonding steel strand 4 by the design flow colligation on distributing bar cage 2, it is inserted Kong Zhonghou and forms the concrete soil blocking pile with the concrete of building, when concrete reaches design stretch-draw intensity level, soil blocking pile is applied prestressing force and uses Special ground tackle with its anchoring, to improve the retaining soil ability of soil blocking pile.

Marked improvement of the present invention and beneficial effect are: the reinforcement manner that is to improve the steel concrete soil blocking pile, in soil blocking pile, reduce the configuration of common steel bar stress, and replace high strength steel strand, and make under the situation that does not increase physical dimension, significantly improve the retaining soil ability of soil blocking pile; Reach the purpose that reduces engineering cost, convenient construction, to overcome the deficiency of known technology.

Description of drawings

Fig. 1 is constructing structure figure of the present invention;

Fig. 2 is a connecting relation figure between no bonding steel wire bundle, steel strand support, reinforcing cage, the concrete for 1-1 of the present invention cuts open figure;

Fig. 3 is no sizing steel wire bundle detail drawing (is example with every Shu Yousan root steel hinge line);

Fig. 4 is that 2-2 sectional drawing of the present invention is the connecting relation figure between a stake substrate anchorage head, steel strand, reinforcing cage, the concrete;

Fig. 5 is steel strand stake substrate anchoring detail drawing of the present invention (is example with every Shu Yousan root steel strand, radical difference, anchor type is identical)

In Fig. 1～Fig. 5, cement bonded sand stone concrete 1, distributing bar cage 2, steel strand support 3, non-bending steel cable 4, stake substrate anchor head 5, stake top anchorage head 6 do not have bonding steel wire bundle 7, reinforcing cage stirrup 8, the vertical muscle 9 of reinforcing cage, steel strand separation sleeve 10, steel wire 11.

The specific embodiment

With reference to Fig. 1～Fig. 5, (a) according to soil blocking pile stress condition situation, the arrangement of reinforcement of calculating stake and the configuration quantity of steel strand, position etc.; (b) soil blocking pile pore-forming; (c) make reinforcing cage; (d) on reinforcing cage, dispose steel strand, and a stake end anchorage head is installed by certain direction; (e) reinforcing cage that will configure steel strand is inserted in the hole according to set direction, and fixing; (f) build pile concrete, and treat that it reaches the prestressing force desirable strength; (g) stake top ground tackle is installed, steel strand is applied prestressing force by design load, and locking; (h) stake top anchorage head is carried out the sealing off and covering anchorage protection, technology is finished.

Claims

1. the application process of a novel post-tensioned pre-stress soil blocking pile comprises cement bonded sand stone concrete (1), distributing bar cage (2), steel strand support (3), does not have bonding steel strand (4), stake substrate anchor head (5), stake top anchorage head (6), do not have bonding steel wire bundle (7), reinforcing cage stirrup (8), the vertical muscle (9) of reinforcing cage, steel strand separation sleeve (10), steel wire (11); It is characterized in that, be connected with metal anchor head (5) after no bonding steel strand (4) end of soil blocking pile structure removes separation sleeve, it is to be formed by connecting by metallic sheath and the steel strand extruding of removing separation sleeve; No bonding steel strand (4) in the soil blocking pile use steel strand separation sleeves (10) that itself and cement bonded sand stone concrete (1) are isolated, steel strand total length cement-free sand-stone concrete (1) bonds in the cover, do not have bonding steel strand (4) and press the design flow colligation on distributing bar cage (2), it is inserted Kong Zhonghou and forms the concrete soil blocking pile with the concrete of building, when concrete reaches design stretch-draw intensity level, soil blocking pile is applied prestressing force and uses Special ground tackle with its anchoring, to improve the retaining soil ability of soil blocking pile.