CAJ | 학술논문

本文研制成功了一种适用于深部土与立井井壁竖向相互作用研究的试验台,开展了饱和砂土与C60混凝土井壁竖向相互作用初步研究.试验台最大有效试验空间为820 mm×820 mm,最大设计承载能力24 MPa,研究土层深度可达1 200 m.针对饱和砂土与C60混凝土界面的竖向剪切试验表明:当界面法向正应力均值取0.2~0.4 MPa时,剪切应力与剪切位移曲线可采用弹塑性模型加以描述,界面产生相互错动时对应的剪切位移约为0.53~1.11 mm,界面极限静摩擦因数为0.70~0.53,界面抗剪强度值约在140~210 kPa之间.
본문연제성공료일충괄용우심부토여립정정벽수향상호작용연구적시험태,개전료포화사토여C60혼응토정벽수향상호작용초보연구.시험태최대유효시험공간위820 mm×820 mm,최대설계승재능력24 MPa,연구토층심도가체1 200 m.침대포화사토여C60혼응토계면적수향전절시험표명:당계면법향정응력균치취0.2~0.4 MPa시,전절응력여전절위이곡선가채용탄소성모형가이묘술,계면산생상호착동시대응적전절위이약위0.53~1.11 mm,계면겁한정마찰인수위0.70~0.53,계면항전강도치약재140~210 kPa지간.
In this article, a test rig applying to research on the vertical interaction between deep soil and shaft lining has been developed successfully. Vertical interaction test between saturated sand and C60 concrete shaft lining has been studied preliminarily. The test rig has three main technical parame-ters: the maximum effective test space is 820 mm×820 mm, the maximum pressure capacity is 24 MPa and the maximum depth of research soil is 1 200 m. The vertical shear test between saturated sand and C60 concrete interface shows that when the average interface normal stress is 0.2-0.4 MPa, the shear stress-shear displacement curve can be described by elastic-plastic model. The maximum shear dis-placement is about 0.53-1.11 mm. The ultimate static friction coefficient is 0.70-0.53 and the interface shear strength is 140-210 kPa.