城市勘测
城市勘測
성시감측
URBAN GEOTECHNICAL INVESTIGATION & SURVEYING
2014年
1期
162-165
,共4页
点荷载强度试验%极限抗压强度%地基承载力特征值%裂隙岩体
點荷載彊度試驗%極限抗壓彊度%地基承載力特徵值%裂隙巖體
점하재강도시험%겁한항압강도%지기승재력특정치%렬극암체
point load test%ultimate compressive strength%characteristic value of subsoil bearing capacity%fissured rock
在勘察过程中，对碎裂岩石很难取得岩块试样进行单轴抗压试验，由点载荷试验可求得点荷载强度指数，进而换算出岩石单轴抗压强度，对岩基承载力进行评价。文章通过工程实例，介绍了点荷载试验方法，并应用该方法结合波速试验、旁压试验对碎裂岩基中的人工挖孔嵌岩桩端阻力进行了评价，与岩基载荷试验对比表明该方法是行之有效的。
在勘察過程中，對碎裂巖石很難取得巖塊試樣進行單軸抗壓試驗，由點載荷試驗可求得點荷載彊度指數，進而換算齣巖石單軸抗壓彊度，對巖基承載力進行評價。文章通過工程實例，介紹瞭點荷載試驗方法，併應用該方法結閤波速試驗、徬壓試驗對碎裂巖基中的人工挖孔嵌巖樁耑阻力進行瞭評價，與巖基載荷試驗對比錶明該方法是行之有效的。
재감찰과정중，대쇄렬암석흔난취득암괴시양진행단축항압시험，유점재하시험가구득점하재강도지수，진이환산출암석단축항압강도，대암기승재력진행평개。문장통과공정실례，개소료점하재시험방법，병응용해방법결합파속시험、방압시험대쇄렬암기중적인공알공감암장단조력진행료평개，여암기재하시험대비표명해방법시행지유효적。
It′s difficult to determine the compressive strength of fissured rock during investigating , the point load strength indexes of rock can be determined by point load test ,from which the uniaxial compressive strength of rock can be calculated ,and then the bearing capacity of rock foundation can be decided also .In this paper ,the method of point load test with velocity test and pressurement for the evaluation of strength and end capacity of large -diameter rock-socket piles is introduced ,and compared the results with those of load test of rock foundation .Through comparative testing ,it shows the said method is effective .
