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Research on the Horizontal Load of Rubberized Cement-soil Piles’ Composite Foundation

Author: LiuTongGuang
Tutor: WangFengChi
School: Shenyang University of construction
Course: Structural Engineering
Keywords: Horizontal load Rubber cement pile composite foundation Horizontal displacement Replacement rate Pressure of soil around the pile Pile stress Pile - soil interaction mechanism
CLC: TU473.1
Type: Master's thesis
Year: 2011
Downloads: 56
Quote: 0
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Abstract


In the general structure of the housing, the pile is mainly vertical loads, but the towering pyramid building as well as high-rise buildings and other projects, the pile will withstand horizontal loads from wind and seismic forces. Rigid pile composite foundation already in industrial and civil application, some regions have begun to be applied in high-rise buildings, most current research around rigid pile composite foundation under vertical loads traits, load transfer mechanism of the vertical loads, pile - soil stress sharing ratio reasonable cushion thickness are more in-depth studies to withstand wind loads and seismic action of the upper structure came under seismic loading, but for its and so the study of the horizontal load is less, it is still in its infancy. Rubber cement pile composite foundation is proposed on the basis of the cement pile composite foundation technology, CFG pile rigid pile composite foundation and rubber concrete research a way to improve the new type of composite foundation of cement-soil foundation treatment technology. Rubber cement pile soft soil, rubber powder, cement, curing agents forced mixing to form a new pile after a series of physical and chemical reactions. A large number of experiments have proved that the cement soil admixtures can improve the performance of soil cement. To the the cement soil mixed with the right amount of rubber powder in this experiment, be able to have a good level of deformation capacity cement pile, freeze-thaw resistance capacity, higher damping ratio, increased ability to resist erosion of harmful ions cement pile. , Due to the constraints of the role of soil between piles of rubber cement pile of rubber cement pile composite foundation, to some extent, alleviate the added rubber powder compressive strength decreases. The rubber powder acts as a soft elastomer cement pile role able to ease the the various stress inside the corresponding improvement in the mechanical properties of the cement pile, reducing the occurrence and development of the internal native crack. Rubber cement pile lateral deformation from the compaction of soil between piles, adequate and reasonable use of soil between piles carrying potential. The rubber cement soil has higher damping ratio, earthquake reduced upper structure pass play isolator role. Through the the indoor rubber cement pile composite foundation level load test, single and group composite foundation pile the rubber powder incorporation pile horizontal displacement, the pile strain, the pile deflection and pile earth pressure relationship. vertical load and pile horizontal displacement relationship, the relationship between the cushion thickness and pile horizontal displacement, displacement rate and pile horizontal displacement and pile strain relations make a detailed analysis and comprehensive summary and rubber cement pile composite foundation pile - soil interaction mechanism to make a certain depth analysis of planing. The test results showed that the right amount of rubber powder of the enhanced ability to pile lateral deformation, the pile strain and deflection values ??increase, the level of load impact composite foundation depth increases, the optimization of the composite foundation pile - soil interaction mechanism, effective improve the bearing capacity of composite foundation level. Given a reasonable cushion thickness of rubber cement pile composite foundation, horizontal bearing capacity of Single design value range, pile bearing capacity of composite foundation level formula, successfully applied by the theoretical study of rubber cement pile composite foundation to provide reference for practical engineering.

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CLC: > Industrial Technology > Building Science > Soil mechanics,foundation engineering > Foundation > Pile foundation and deep foundation > Pile
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