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Combination of Soil and Rock Formation on the Micro-Pipe Pile-Anchor Application Support

Author: LuoPing
Tutor: ZhangMingYi
School: Qingdao Technological University
Course: Structural Engineering
Keywords: Excavation Micro-steel pipe pile Anchor Combined supporting Stress test
CLC: TU472
Type: Master's thesis
Year: 2010
Downloads: 55
Quote: 0
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Abstract


Geological conditions in most parts of urban areas is relatively good in Qingdao City, It is complicated fou deep foundation, because it has the soil layer excavated directly and the rock layers required blasting, as well as groundwater. Foundation for the geological conditions of the general distribution of top-down miscellaneous fill, weathered rock, medium weathered rock, weathered rock, etc., based mostly located in the rock, mostly rock foundation construction combined with class projects, the characteristics of the project is the upper part of the soil and groundwater associated with the lower layers of rock.In practical engineering, due to the distance from the foundation to building is near, the conditions that can not be used pile. Micro steel pipe pile - Anchor support structure is limited in these conditions support the development of a new type of structure, it can be less than 1m in the building from the foundation of the regional construction safety, to ensure stability of excavation and adjacent buildings normal use, you can also pit the deformation control in a very small range.This article relies on a key project in Qingdao, the main mode of the project by supporting micro-pipe pile - bolting. This thesis project based on the measured data on soil and rock strata on the combination of micro-pipe pile - bolting were analyzed. Made the following main tasks:(1) Collect Micro steel pipe pile and anchor information, analyze and summarize previous research and obtain the finding theory, which is inportant to the practical engineerings.(2) Study the micro-pipe pile in the combination of soil and rock in Qingdao, and analyse of micro-pipe pile bending moment after the curve of steel pipe pile on the micro-deformation and mechanism of the force. In accordance project, select the two units set up Micro steel pipe pile, and the symmetrical distribution of strain gauges affixed method, the stress on the micro-monitoring of steel pipe pile. (3) Analysing the safty of the project, and obtining a new calculation method of the new support, combined with surveys of micro-pipe pile and anchor. the result also show that, the deformation of the anchor with the new support is smaller,and the horizontal displacement of foundation is also smaller.

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CLC: > Industrial Technology > Building Science > Soil mechanics,foundation engineering > Foundation > Artificial foundation reinforcement
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