为了扩大钻孔灌注桩的使用范围,我工区在首都“前三门”501招待所工程中,在采用钻孔灌注桩基础的同时,曾用钻孔灌注桩做为挡土桩及附着式塔吊(QT4-10型)桩基,加快了施工进度,并为国家节约了大量资金。一、用钻孔灌注桩作挡土桩501招待所工程系采用钻孔灌注桩基础的十六层高层建筑,靠主楼南面(?)轴2.3米、深-9.45米处有一条市政规划的φ1050下水道,下水道上面尚有四层框架配楼横跨盖板河(见图1)。设计要求下水道应在主楼基 In order to expand the scope of use of bored cast-in-place piles, our work area was in the “First Three Doors” 501 guesthouse project of the capital. While using bored pile foundations, borehole piles were used as retaining piles and attached tower cranes ( The QT4-10 type pile foundation has accelerated construction progress and saved the country a lot of money. 1. The use of cast-in-place piles as retaining piles 501 The guest house is a 16-story high-rise building using cast-in-place pile foundations. There is a municipal planning φ1050 sewerage at 2.3m by the southern (?) axis of the main building and a depth of -9.45m. There are still four tiers of frameworks across the sewers across the river (see Figure 1). Design requirements sewer should be in the main building base