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（1 中南大學(xué)土木建筑學(xué)院，長(zhǎng)沙 410075；2 長(zhǎng)沙市勘測(cè)設(shè)計(jì)研究院，長(zhǎng)沙 410007）

［摘要］應(yīng)用剪切試驗(yàn)、基巖內(nèi)樁側(cè)摩阻力試驗(yàn)和高壓旁壓試驗(yàn)及樁身應(yīng)力測(cè)試，對(duì)湘瀏盆地內(nèi)泥質(zhì)粉砂巖的嵌巖段樁側(cè)阻力的研究表明，按《建筑樁基技術(shù)規(guī)范》（JGJ94—94）確定的側(cè)阻力偏低，分析了不同方法確定的結(jié)果差異的根源，提出了以單軸天然抗壓強(qiáng)度標(biāo)準(zhǔn)值為基礎(chǔ)，按0.15～0.30系數(shù)折減計(jì)算嵌巖段極限側(cè)阻力的取值標(biāo)準(zhǔn)，對(duì)類似地區(qū)樁基設(shè)計(jì)有一定的參考價(jià)值。

［關(guān)鍵詞］軟巖嵌巖樁；紅層；嵌巖段側(cè)阻力

Test study on lateral resistance of rock-socket in red beds

Peng Baixing 1,2, Wang Xinghua 1, Yin Changjun 1

 (1 Civil Architectural Engineering College, Central South University, Changsha 410075, China;

 2 Institute of Investigation & Design, Changsha 410007, China）

Abstract:Test study is made on the lateral resistance of socketed pile in argillaceous siltstone in Xiangliu basin, which includes straight shear test, side resistance test in rock, high pressure pressurement test (PMT) and stress detector. Through the testing and analysis, it is found that the side resistance of red beds evaluated with Technical Code for Building Pile Foundation(JGJ94—94) is quite lower. And then the difference and influence factors for test results have been discussed also. An improved parameter formula is given to calculate the side resistance of embedded section with uniaxial compressive strength standard value under natural moisture, and its reduced coefficient is 0.15 to 0.30. The results is deserved to be applied to practical problems such as those on soft rocks.

Keywords:socketed pile in soft rock; red beds; side resistance of rock-socketed pile