Single Point Pile - Anchor Prestressed Lock Value Impact Study Of The Factors

In recent years, along with the fast development of urban construction, the massive building of high-rise construction and the development use of city underground space, will certainly to bring the large-scale excavating and support for building foundation project .In the multitudinous ground support form, the structure of anchored piles in row is one kind of support forms which our country often uses at present and has been widely and persistly used.In the bolting of pile support structure, which the structure final stress, the strained condition and the environment benefit of foundation pit are determined by pre-stressed definite value of bolting, is one of determining factors of computation model and the practical work condition of foundation pit. But the pre-stressed definite valueβof bolting is very separate in the standard and is disadvantageous to grasp in the project.On the theoretical analysis of basis, this article had considered the anchor rod rigidity change under different operating mode condition, established the computation model of the single point anchor rod pre-stressed to lock the definite value influence factor, and has compiled the computational procedure using the half law. At the same time it analyses anchor rod pre-stressed the influence factors using this procedure. The computed result indicated that in the single factor influence situation, cohesive strength of earth, inner frictional angleφ, the anchor rod inclination angleθwithβbecame the inverse relation. But it is very smallerθtoβthe influence. Depth ofβfoundation pit H, bulk density of earthγ, bolting position L_f and anchor rod space d withβbecomes the direct ratiorelations, also the influence effect is remarkable. This article research results may the anchor rod pre-stressed lock the definite value for the actual project in these lection to provide the beneficial reference.This article research results may provide the beneficial reference of choice the anchor rod pre-stressed lock the definite value in the factual projects.