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Analysis based on soft ground deformation observation data accuracy and reliability

Author: LiuXiaoMing
Tutor: YuanYongBo；GuoYeYu
School: Dalian University of Technology
Course: Municipal Engineering
Keywords: Accuracy Reliability Proposed Stable Adjustment Error circle Soft foundation Datum point
CLC: TU196
Type: Master's thesis
Year: 2003
Downloads: 216
Quote: 1
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Abstract

Deformation monitoring is an important part of the construction quality management and safety management , the use of a fixed datum ( point ) , the establishment of the subsidence network , and through the different stages of observation , past the buildings , the status quo and to conduct a security assessment in the future , the same oil field operating area , including the construction of the tank farm to the management stage , the settlement observation is an important content . Oilfield engineering buildings in soft ground conditions , the absence of solid starting reference ( or reference point far away from the operating area ) , deformation observation data processing and analysis should be selected according to the actual conditions of the conventional methods of solution . Liaohe Jinma Oilfield Corporation operating area (including the distribution of oil storage tank ) in the soft ground characteristics , this article made ??the following tasks: and first settlement monitoring network optimization . Geometric network in order to improve the accuracy and reliability of the monitoring point point to establish the shape constraints included (or checking conditions ) is as much as possible under the conditions are feasible , and solver program according to the site the geological terrain conditions and methods of observation optimization ( If you choose to observing elements and estimate accuracy ) choice, such elevation monitoring network to provide a reliable reference point for the tank farm construction monitoring purposes , but also as a long-term regional settlement . Second according to the characteristics of the soft ground , in order to reach the observation results of a reasonable processing purposes , the settlement deformation monitoring network data processing , using three adjustment mathematical model the classic adjustment that is , free network adjustment and quasi - stable adjustment observations benchmark network solver , and calculating the results of the comparison and contrast , to elect the most reasonable in line with the actual conditions of a group solver results as a basis for later deformation results accuracy analysis . Geometric constraint conditions, based on observations at the same time observations of gross error detection of normal statistical analysis , calculating results of objectivity, accuracy and high reliability purposes . By comparative analysis of a variety of computing solutions , combined with the actual situation of the scene , presented a selection of quasi-stable adjustment , treatment with 7 closed constraints leveling network solver , it is the preferred and actual match program .

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