Stress Analysis of Double Row Anti-slide Pile

Abstract

Double row pile as a retaining structure in slope reinforcement and foundation pit support engineering and many other neighborhoods, it has a wide application. But due to the complexity and difference of the soil around the pile, the interaction mechanism between pile and soil is not clear. Calculated with different models and assumptions of double row pile internal force has big difference. On the basic of the former research, this paper improves the basic assumption. Analysis of the soil stress between the double row pile under the improvement basic assumption, and further analysis of the characteristic of the double row pile stress. It guides the practical application in engineering. 1. Background The landslide is a large area of soil along a sliding surface slither which caused by the loose soil landslide by gravity, pour water pressure and vibration and other factors. It is a natural disasters phenomenon. It caused a serious security risk to people's life and property safety. It has enormous energy and destructive power. As a common retaining structure of double row piles are widely used in slope engineering. Put the double row piles into the landslide. It can improve the force mechanism of the soil landslide. Then it enhances the soil strength, and makes above the slide surface of the slope and sliding surface below the soil forming an entirety. The thrust of landslide soil above the sliding surface transfers to the below sliding surface to stability of foundation (1) . Compared with the traditional measures of landslide, anti-slide pile has the advantages of anti sliding ability, flexible layout, and convenient construction, wide use, safe and reliable. The stress of double row piles is a space force, so the calculation is very complicated. The commonly used calculation models have some limitations, such as inter pile soil static earth pressure model, before and after the row soil pressure distribution model, Lang Jintu pressure or Coulomb's earth pressure theory. These can not accurately analyze the stress of the double row piles (2,3) . In this paper, analysis of the soil between the pile which in the double raw pile, and then stress analysis of the double raw pile. It applied in practical engineering provide theoretical support. 2. Stress Analysis of the Soil between the Double Raw Pile (1) Stress analysis of the soil between the double raw pile The analysis method of rigid plastic body model is used to analyze the inter pile soil stress in this paper. This method does not consider the effect of cohesive soil particles. This paper will improve and prefect this method under this basis. It mainly studies on the soil rupture angle between the piles and pile spacing effect. It ignores friction between pile and soil in the process of analysis. The stress model is shown in Figure 1: