论文部分内容阅读
在广东黄埔地区某一工程需要砂桩基础。施工地区原为耕地,表面现覆盖3～6米厚的细砂层,其下有1.5米深的种植土和2～3米深的淤泥,再往下为粉砂层。现在就是要在细砂层下填灌砂桩。过去,曾采用10吨震动力的震动打桩机施工,因力量太小,不能通过表面砂层。后又改用落锤方法,也很难通过细砂层(11米深的桩有时需打1120锤,耗费一个多小时)。为了解决上述困难,该工程单位曾派人来
Huangpu area in Guangdong, a project needs sand pile foundation. The construction area was originally arable land, the surface is covered with fine sand layer 3 to 6 meters thick, under which 1.5 meters deep planting soil and 2 to 3 meters deep silt, and then down to silt layer. It is time to fill sand piles under the fine sand layer. In the past, the construction of a vibratory pile driver with a vibration of 10 tons had been used because of its too small force to pass through the surface sand layer. Later changed to drop hammer method, it is difficult to pass fine sand layer (11 meters deep pile sometimes need to hit 1120 hammer, takes more than an hour). In order to solve the above difficulties, the engineering unit was sent