旋挖泥浆护壁成孔灌注桩施工质量控制

文章对旋挖成孔灌注桩的施工技术与质量控制进行了深入的研究,分析了旋挖成孔灌注桩施工技术的工艺要点,并对其施工工艺以及质量控制的措施做了详细阐述。

论述人工成孔灌筑桩的施工程序及技术要求

地基浅层土质不良 ,采用人工处理将增加成本并工期延长 ,经过科学论证采用桩基 ,能满足建筑物所需承载力及变形两方面的要求 ,另外从造价便宜、环境污染少、无噪声、施工设备简单等各个方面综合 ,人工成孔灌筑桩不但能满足上述条件 ,而且 ,质量易于保证 。

Study of pile shaft resistance in clayey soils

Based on principal component analysis, the rules of clayey soil's behaviors affected by varied indices were studied. It was discovered that the common method of the single liquidity index IL used to determine the consistency of silt-clay or silt-loam was not rational. It was more rational that the liquidity index IL combined with the void ratio e characterized the behavior of silt-clay. Similarly the index of e depicted the nature of sandy loam more rationally than IL. The method of predicting the pile shafted resistance by the two indices of e and IL, which was more accurate, was obtained by the methodology of back propagation (BP) artificial neural networks combined with principal component analysis. It was also observed that the pile shaft resistance increased with the increase of depth within a critical affect-depth ranging from 20 to 30 m, and the harder the clayey soil consistency was, the shallower the critical depth was.

某工程的基坑支护探讨

结合具体的工程概况,对该工程的护坡方式作了探讨,对大开挖、放边坡、放坡土钉墙的施工、直立土钉墙的施工作了阐述,并对其经济作了分析,从而确保了工程的基坑支护。