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首页> 外文会议>European young geotechnical engineers conference >Determination of 1200 mm working piles deformation parameters, using test of smaller diameter pile for the piled raft foundation of Capital Fort project
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Determination of 1200 mm working piles deformation parameters, using test of smaller diameter pile for the piled raft foundation of Capital Fort project

机译：测定1200毫米工作桩变形参数，利用较小直径桩试验，为首都堡项目堆积筏基础

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摘要

Capital Fort mixed used development comprises a 30-storey, 126 m high office tower and an 8-storey, 35 m high, L-shaped office building, unified with a two storey deep basement. Foundation structure is a raft with a variable thickness under both buildings and bored piles under the high-rise. Deformation and strength characteristics of the soil, received from the geological survey, are used for a preliminary analysis of the combined piled raft foundation. Deformation modules are defined using the results from the standard penetration test. Single pile test is performed for determination of the geotechnical parameters used for refinement of soil analytical model. Working piles are 28 m deep and have a diameter of 1200 mm. Pile with smaller diameter (600 mm) is used for the test. The depth of the tested pile is the same as the working ones. Casing and concrete grade C25/30 are used for the construction of the pile. Anchoring system comprises four working piles. Hydraulic loading system with 8000 kN capacity is used. Measuring system monitors the settlement of the pile head and comprises three dial gauges with 0.01 mm precision, placed at 120 degrees in plan. The pile is loaded in 11 steps of 700 kN each, up to 7700 kN, realizing 30.5 mm settlement. Results from the test and a comparison with the analytical results from the preliminary adopted parameters are presented in the article.
机译：Capital Fort Mictific Soffects包括30层高，高级办公大楼和8层高，35米高，L形办公楼，统一两层深层地下室。基础结构是一个筏，在高层建筑物和钻孔桩下具有可变厚度。从地质调查中收到的土壤的变形和强度特征，用于初步分析堆积筏基础。使用标准渗透测试的结果定义变形模块。进行单桩试验，用于测定用于改进土壤分析模型的岩土参数。工作桩深28米，直径为1200毫米。直径较小的桩（600 mm）用于测试。测试桩的深度与工作组相同。套管和混凝土级C25 / 30用于构造桩。锚固系统包括四个工作桩。使用具有8000 kn容量的液压装载系统。测量系统监测桩头的沉降，并包括具有0.01毫米精度的三个表格仪，置于120度的计划中。该桩以700kN的11步装载，每个高达7700 kN，实现30.5毫米沉降。研究结果和与初步采用参数的分析结果进行了比较。

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