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Quality Control Measures of bored pile in Bridge Construction

Journal of World Architecture 2023年第2期7卷 47-52页

作者： Lin Nan Guangjun Li Yan Liu Xu Meng Yingying Ye Zhongyang Sun China Merchants Chongqing Highway Engineering Testing Center Co. Ltd.Chongqing 400060China

In order to improve the quality of bored piles in bridge construction and ensure the overall quality of the bridge,we analyzed a series of problems in the construction process of bored piles,then propose corresponding quality control measures,in hopes of improving quality control of bored piles in bridge construction in our country.

关键词： Bridge construction bored pile Quality control

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A case study on behaviors of composite soil nailed wall with bored piles in a deep excavation

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Journal of Central South University 2013年第7期20卷 2017-2024页

作者： ZHU Feng-bin MIAO Lin-chang GU Huan-da CHENG Yue-hong Institute of Geotechnical Engineering Southeast University Nanjing 210096 China School of Civil Engineering Suzhou University of Science and Technology Suzhou 215011 China Sttzhou Erjian Construction Group Co. Ltd Suzhou 215131 China

A complete case of a deep excavation was explored. According to the practical working conditions, a 3D non-linear finite element procedure is used to simulate a deep excavation supported by the composite soil nailed wall with bored piles in soft soil. The modified cam clay model is employed as the constitutive relationship of the soil in the numerical simulation. Results from the numerical analysis are fitted well with the field data, which indicate that the research approach used is reliable. Based on the field data and numerical results of the deep excavation supported by four different patterns of the composite soil nailed wall, the significant corner effect is founded in the 3D deep excavation. If bored piles or soil anchors are considered in the composite soil nailed wall, they are beneficial to decreasing deformations and internal forces of bored piles, cement mixing piles, soil anchors, soil nailings and soil around the deep excavation. Besides, the effects due to bored piles are more significant than those deduced from soil anchors. All mentioned above prove that the composite soil nailed wall with bored piles is feasible in the deep excavation.

关键词： deep excavation 3D non-linear finite element bored pile composite soil nailed wall corner effect deformation internal force

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Grouted pile and Its Bearing Capacity

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Journal of Modern Transportation 2000年第1期17卷 25-32页

作者：于志强王旭吴兴序 School of Civil Engineering Southwest Jiaotong University Chengdu 610031 China

The grouting method applied in bored pile is an improvement to the conventional bored pile. Load tests have proved that grouting under the bored pile tip is an effective method to enhance the bearing capacity of the pile and to reduce the pile settlement. In this paper, the grouting technology is described and pile load test results are discussed. In order to put the grouting method into design practice, the authors analyze the working mechanism of soil compaction. And, based on the theory of cavities expansion in soil mass, approximate formulae are proposed for estimating the bearing capacity of the grouted pile. The theoretical prediction agrees well with the load test results.

关键词： grouting method bored pile grouted pile bearing capacity cavities expansion

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