一、引言大直径人工挖孔灌注桩(以下简称实心桩)因其桩承载力较高,造价较低,近年来发展较快。在遇电梯井时,一般将桩布置在电梯井壁四角(如图1),这种布置方式往往满足不了桩基规范(JGJ94—94)规定的最小桩距要求,在这种情况下,采用大直径人工 I. INTRODUCTION The large-diameter artificial digging and pouring pile (hereinafter referred to as solid pile) has a relatively fast development because of its high bearing capacity and low cost. In the case of elevator shaft, the pile is usually arranged in the four corners of the shaft wall (Figure 1), this arrangement often can not meet the pile foundation code (JGJ94-94) minimum pile spacing requirements, in this case, the use of Large diameter artificial