临海地区大直径深长钻孔灌注桩承载性状试验研究

基于山东某地液化储气罐区试桩工程,通过单桩竖向抗压静载试验,分析大直径深长钻孔灌注桩在竖向荷载作用下各层土中的荷载传递规律。试验结果表明:大直径深长钻孔灌注桩呈摩擦桩特性,即桩端承载力占比较低;桩侧阻力发挥非同步,且在荷载传递过程中相互影响;相近土层因埋深不同其侧阻发挥差异较大;施工工艺对桩侧土体阻力的发挥影响较大。

Experimental Research on Load-Bearing PropertiesLarge-DiameterLong Bored Cast-in-Place Pilesin Coastal Area

Based on the test pile works of liquefied gas tank farm in Shandong Province,Static load test of vertical compression of single pile is carried out to analyze the load transfer law for large-diameter super long cast-in-place pile under the action of vertical load.The test results show that the large-diameter super long cast-in-place pile has the characteristics of friction pile,that is,the pile end bearing capacity accounts for a relatively low proportion;the lateral resisting force play a non synchronous role and interact with each other in the process of load transfer;the adjacent soil layers have different lateral resisting forces due to different buried depth;the construction technology has a great influence on the exertion of the lateral resistance.