CN202416297U

CN202416297U - Post-tensioned prestressing construction device for filling pile

Info

Publication number: CN202416297U
Application number: CN2012200021339U
Authority: CN
Inventors: 胡长友
Original assignee: Hubei Central South Exploration & Foundation Engineering Co Ltd
Current assignee: Hubei Central South Exploration & Foundation Engineering Co Ltd
Priority date: 2012-01-05
Filing date: 2012-01-05
Publication date: 2012-09-05
Anticipated expiration: 2022-01-05

Abstract

The utility model relates to a post-tensioned prestressing construction device for a filling pile. The post-tensioned prestressing construction device is characterized by comprising a bearing plate arranged in a pile hole at the bottom of a steel reinforcement cage, wherein a plurality of steel stranded wires extending towards the ground are vertically connected onto the bearing plate; the bottom ends of the steel stranded wires are fixedly connected with the bearing plate through a pier nose; the top ends of the steel stranded wires extend out of the ground; the height of each steel stranded wire is greater than the height of an actual concrete filling surface of the filling pile; a steel stranded wire casing pipe is sleeved at the part between two ends of each steel stranded wire; and the bottom end of the steel stranded wire casing pipe is welded with the bearing plate. According to the post-tensioned prestressing construction device disclosed by the utility model, the bending resistance of the filling pile is improved by using prestress, the reinforcement ratio of the filling pile is reduced and steel reinforcing bars are saved.

Description

Castinplace pile Post-tension Prestress Construction device

Technical field

The utility model relates to a kind of castinplace pile Post-tension Prestress Construction device.

Background technology

In the stake supporting (comprising stake support, piled anchor) that building foundation pit supporting adopted, the moment of flexure that soldier pile bore has directly determined the reinforcement ratio of soldier pile.Because soldier pile is big than the moment of flexure that castinplace pile bore that building foundation adopts; For practicing thrift reinforcing bar; Existing technical scheme is: take segmentation arrangement of reinforcement or inhomogeneous arrangement of reinforcement; But because factors such as stratum, surrounding enviroment, underground water, there is certain uncertainty in the moment of flexure that soldier pile bore, so just causes certain risk.

Summary of the invention

The purpose of the utility model is to overcome the shortcoming of prior art, and a kind of castinplace pile Post-tension Prestress Construction device is provided, and utilizes prestressing force to improve the bending resistance of castinplace pile, and the reinforcement ratio of minimizing castinplace pile is practiced thrift reinforcing bar.

For solving above technical problem; The technical scheme of the utility model is: castinplace pile Post-tension Prestress Construction device; Its difference is: it comprises the bearing plate that is used for being arranged on the reinforcing cage bottom that hole for grout pile installs; Vertically be connected with the many steel strand that extend earthward on the bearing plate, the steel strand bottom is fixedly connected with bearing plate through pier nose, and elevate above the soil in the steel strand top and it is highly greater than the height of the actual concrete spouting face of castinplace pile; Position between the steel strand two ends is with the steel strand sleeve pipe, the bottom of steel strand sleeve pipe and bearing plate welding.

By above scheme, said bearing plate is annular, and its diameter is identical with the reinforcing cage diameter.

The contrast prior art, the beneficial features of the utility model is following:

1), this castinplace pile Post-tension Prestress Construction device, utilize prestressing force to improve the bending resistance of castinplace pile;

2), this castinplace pile Post-tension Prestress Construction device, can reduce the reinforcement ratio of castinplace pile, practice thrift reinforcing bar.

Description of drawings

Fig. 1 is the utility model embodiment overall structure sketch map;

Fig. 2 is the utility model embodiment polycrystalline substance sketch map;

Fig. 3 is the structural representation under the utility model embodiment user mode;

Wherein: 1-bearing plate, 2-steel strand, 3-steel strand sleeve pipe, 4-pier nose, 5-reinforcing cage.

The specific embodiment

Combine accompanying drawing that the utility model is done further explain through the specific embodiment below.

Please refer to Fig. 1, Fig. 2 and Fig. 3; The utility model castinplace pile Post-tension Prestress Construction device; It comprises the bearing plate 1 that is used for being arranged on reinforcing cage 5 bottoms that hole for grout pile installs; Vertically be connected with the many steel strand 2 that extend earthward on the bearing plate 1, steel strand 2 bottoms are fixedly connected with bearing plate 1 through pier nose 4, and elevate above the soil in steel strand 2 tops and it is highly greater than the height of the actual concrete spouting face of castinplace pile; Position between steel strand 2 two ends is with steel strand sleeve pipe 3, the bottom of steel strand sleeve pipe 3 and bearing plate 1 welding.

Preferably, bearing plate 1 is annular, and its diameter is identical with reinforcing cage 5 diameters.

Concrete, 3 colligations of steel strand sleeve pipe are fixed on the reinforcing cage.

A kind of job practices of the utility model embodiment castinplace pile Post-tension Prestress Construction device is: before the castinplace pile perfusion; When reinforcing cage 5 is installed, this castinplace pile Post-tension Prestress Construction device is put into a hole; Steel strand sleeve pipe 3 is welded on the bearing plate and exceeds the actual concrete spouting face of castinplace pile 50cm, enters into steel strand sleeve pipe 3 to prevent concrete.After cast-in-place pile concrete reaches 70% intensity, on Guan Liang, use prestressed anchor that pre-buried steel strand 2 are carried out stretch-draw, castinplace pile is applied prestressing force, thereby improve the castinplace pile bending resistance.

Above content is the further explain that combines concrete embodiment that the utility model is done, and can not assert that the practical implementation of the utility model is confined to these explanations.For the those of ordinary skill of technical field under the utility model, under the prerequisite that does not break away from the utility model design, can also make some simple deduction or replace, all should be regarded as belonging to the protection domain of the utility model.

Claims

1. castinplace pile Post-tension Prestress Construction device; It is characterized in that: it comprises the bearing plate that is used for being arranged on the reinforcing cage bottom that hole for grout pile installs; Vertically be connected with the many steel strand that extend earthward on the bearing plate, the steel strand bottom is fixedly connected with bearing plate through pier nose, and elevate above the soil in the steel strand top and it is highly greater than the height of the actual concrete spouting face of castinplace pile; Position between the steel strand two ends is with the steel strand sleeve pipe, the bottom of steel strand sleeve pipe and bearing plate welding.

2. castinplace pile Post-tension Prestress Construction device as claimed in claim 1, it is characterized in that: said bearing plate is annular, and its diameter is identical with the reinforcing cage diameter.