论文?报告
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バンコクにおいてアースドリル工法による场所打ちコンクリート杭を施工し、杭の押込み试験を実施してその支持力特性について検讨した。その结果、试験时の最大沉下量は许容値未満であり、支持力の99%を周面摩擦力が负担していることが明らかとなり押込み试験は支持力を评価するための有効な手段であることが确认された。押込み试験结果を再现するために、降伏基準に惭辞丑谤-颁辞耻濒辞尘产式を用いて3次元弾塑性贵贰惭解析を実施した。解析结果では支持力に対する周面摩擦力の负担率が95%と実験结果よりも小さくなった。これは、地盘を弾塑性としてモデル化したことに要因があるものと推察された。 キーワード: 杭、押込み试験、周面摩擦力、支持力、贵贰惭解析 |
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Bearing capacity characteristics of a cast-in-place concrete pile in Bangkok were studied by conducting an instrumented static load test. It was found that 99% of the allowable bearing capacity of the pile was taken by the skin friction and the settlement of the pile met with the standards. It was understood that the instrumented static load test as an effective method to verify the bearing capacity. In the second part of this study, 3D finite element (FEM) analysis was conducted to simulate the load test by modeling Bangkok soil using Mohr-Coulomb (linear elasto-plastic) model. From the analysis results, it was found that only 95% of the allowable bearing capacity was taken by the skin friction and that value was smaller than the test results. In addition to that, the settlement of the pile was higher than the test results. It was understood that it is difficult to simulate the behavior of Bangkok soils only by using a linear elasto-plastic model. Key Words: Pile, Instrumented static load test, Skin friction, Bearing capacity, FEM analysis |
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