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首页> 外文会议>Deep Foundations Institute 28th Annual Conference on Deep Foundations: Deep Foundations in Compressible Soil and Soft Rock >LATERAL PILE LOAD TESTING UNDER CYCLIC LOADS
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LATERAL PILE LOAD TESTING UNDER CYCLIC LOADS

机译：循环荷载下的水平桩荷载测试

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This paper presents a case study of a cyclic lateral pile load testing program performed on two 18-in square prestressed concrete piles (PSC) in Savannah, Georgia. The load test program was developed to simulate the lateral behavior of a single pile under seismic loading conditions for the design and construction of a large LNG storage tank. The lateral load tests included cyclic loading to measure possible degradation in soil response followed by static loading to large displacements (around 6 inches at the loading point). The lateral load was applied through a reciprocating jack positioned to push and pull the piles against each other. The test piles were instrumented with multiple displacement transducers, downhole inclinometer, and strain gauges. This paper provides an interpretation of the test results regarding the pile performance and soil response to monotonic and cyclic lateral loading. A backfitted computational model of the soil resistance was developed to match the test results using the LPILE computer program. The load-deflection and deflection/moment versus depth comparisons suggest that this model appears to capture the behavior relatively well within the general range of suitability for design purposes. New design curves were developed based on the soil parameters derived from the lateral load test results.
机译：本文介绍了对乔治亚州萨凡纳的两个18英寸方形预应力混凝土桩（PSC）进行的循环侧向桩荷载测试程序的案例研究。开发了载荷测试程序，以模拟在地震载荷条件下单桩的横向行为，以设计和建造大型LNG储罐。横向载荷测试包括循环载荷以测量土壤响应的可能退化，然后是大位移（载荷点约6英寸）的静态载荷。通过往复千斤顶施加横向载荷，该往复千斤顶被定位成将桩彼此推拉。用多个位移传感器，井下倾角仪和应变仪对测试桩进行了测试。本文提供了有关桩性能和土壤对单调和周期性侧向荷载反应的测试结果的解释。使用LPILE计算机程序开发了土壤阻力的反演计算模型，以匹配测试结果。载荷-挠度和挠度/力矩与深度的比较表明，该模型在设计目的的适用范围内似乎较好地捕获了性能。根据从侧向载荷测试结果得出的土壤参数，开发了新的设计曲线。

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