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建筑工程基础施工中,冲、钻孔灌注桩因其承载力大、对周边建筑干扰少、工期较快等优点而广泛采用。一、地质情况及桩型某工程,根据地质勘察资料,该场地地层结构及岩性特征自上而下为杂填土、粉质粘土、淤泥、粉质粘土、中砂、淤泥质土、中砂、粉土、圆砾、卵石、强风化花岗岩、中风化花岗岩,基岩埋深在50m以下。地层结构主要为砂土、粘性土砂砾石层组成,卵石层厚度10米左右。根据地勘资料及建筑物荷载情况,结合本工程的结构特点,竖向承压选用φ1000mm、φ1200mm直径冲、钻孔灌注桩,并采用采用桩端、桩侧后注浆工艺提高单桩承
In the foundation construction of construction projects, red and cast-in-place bored piles are widely adopted because of their large bearing capacity, less disturbance to the surrounding buildings and faster construction period. First, the geological conditions and pile type of a project, according to geological survey data, the site structure and lithological characteristics of stratum from top to bottom miscellaneous fill, silty clay, silt, silty clay, sand, muddy soil, medium Sand, silt, round gravel, pebbles, strong weathered granite, weathered granite, bedrock depth below 50m. Stratum structure is mainly sand, clay sand gravel layer, pebble layer thickness of about 10 meters. According to the geological prospecting data and the load of the building, combined with the structural features of the project, the vertical bearing adopts φ1000mm, φ1200mm diameter punched and bored piles, and adopts the pile end and post-pile grouting to improve the single pile bearing