On-site monitoring and evaluation method for settlement of pile foundations

Abstract

The invention relates to on-site monitoring and evaluation control for adjacent viaduct pile foundations of a subway, and particularly discloses an on-site monitoring and evaluation method for the settlement of pile foundations, which comprises the steps of: setting a bench mark in an on-site monitoring area by using a precise levelling instrument and an indium steel ruler and forming a bench mark network; taking a bench mark control network as a benchmark to, acquire height data of the pile foundations, and collating the height data to obtain settlement displacement values according to a time sequence; and sorting the pile foundations into four types according to the settlement displacement values, and processing different types of pile foundations respectively, in particular reinforcing A type of pile foundations in time. The method realizes the on-site effective and timely monitoring and timely reinforcement on adjacent construction of underground engineering, overcomes the potential hazard caused to engineering construction by the lack of timely on-site monitoring, and has an important significance in controlling the settlement of the pile foundations caused by the adjacent construction and ensuring the use security of an adjacent building.

Description

[0001] An on-site monitoring and evaluation method for pile foundation settlement technical field [0002] The invention relates to the field of on-site monitoring and evaluation of engineering construction safety, in particular to the on-site monitoring and evaluation control of pile foundations of subways approaching viaducts. Background technique [0003] On-site monitoring and evaluation of engineering construction safety has always been an important issue in engineering construction. Especially with the continuous acceleration of the urbanization process in our country, the situation of close construction of underground engineering is more and more frequent, and the problem of close pile foundation is constantly emerging. The impact of underground engineering construction on close pile foundation is directly related to the use safety of each close building Timely on-site monitoring and evaluation is particularly important. [0004] In recent years, some experts and sch...

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Problems solved by technology

[0005] The above studies have done more and more research on the zoning and classification of the influence of adjacent pile foundations and the mechanics of adjacent construction in underground engineering, but less research has been done on the on-site monitoring of the settlement of adjacent pile foundations.

In actual work, the possible adjacent pile foundations in the design process are usually calculated by theoretical models, and measures such as reinforcement are taken for the adjacent pile foundations according to the calculation results, and the effectiveness of the reinforcement measures is calculated through the theoretical model according to the reinforcement methods. None of these methods Timely monitoring on site cannot provide timely and effective help for complex and changeable factors in actual engineering construction, which is not conducive to controlling the settlement of pile foundations caused by close construction and ensuring the safety of close buildings

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