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基于土拱效应围护桩间距的计算模型(PDF)

《南京林业大学学报(自然科学版)》[ISSN:1000-2006/CN:32-1161/S]

Issue:
2015年01期
Page:
130-134
Column:
研究论文
publishdate:
2015-01-30

Article Info:/Info

Title:
Calculation model of spacing between guard piles based on soil arch effect
Article ID:
1000-2006(2015)01-0130-05
Author(s):
ZHAO ZhifengWANG HaiboZHANG Tian
College of Civil Engineering, Nanjing Forestry University, Nanjing 210037, China
Keywords:
guard pile soil arching effect spacing between piles model
Classification number :
TU433
DOI:
10.3969/j.issn.1000-2006.2015.01.024
Document Code:
A
Abstract:
Computation method of pile spacing is in deficiency in the present design of guard piles. The computation model of soil arching under horizontal load was set up and stress analysis was carried out based on considering horizontal soil arching effect.The soil behind arch still bears part of stress when soil arch subjected to horizontal soil pressure,when soil behind arch is in limit state,the stress in different orientation meets certain relationship. The geometric condition of arch foot and the static balance condition, the formulas of pile spacing in cohesive and cohesiveless soil were derived based on the soil limit state. The suggestion value of pile spacing is zero for the concern of safety when the soil behind pile is cohesiveless. The suggestion value of pile spacing can be computed according to the equation when the soil behind pile was cohesive. The chosen shear strength of soil is important in utilizing the equation and the value of inner friction angle should not too large(≤20°).

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Last Update: 2015-01-31