（中联西北工程设计研究院有限公司，  西安 710082）

［摘要］西安地区高层建筑地基基础方案采用桩基或复合地基较多，但在西安某些地区分布有工程地质性能良好的砂层，这类砂层地基承载力较高，压缩性较低。结合一栋96-15m高的33层高层建筑，通过原位平板荷载试验，从地基承载力验算、软弱下卧层验算、地基变形验算、沉降观测等方面分析得出，细中砂层作为高层建筑天然地基的地基持力层是可行的。

［关键词］细中砂； 天然地基； 高层建筑； 持力层

中图分类号：TU471, TU97文献标识码：A文章编号：1002-848X(2017)02-0096-04

Design of a 33-layer high\|rise building adopting natural foundation in medium-fine sand bearing layer in Xi′an

Miao Changchun， Zhang Pingshun， Ren Xunbo

(China United Northwest Institute for Engineering Design and Research Co., Ltd.，  Xi′an 710082， China)

Abstract: Pile foundation and composite foundation are the main forms of the foundation schemes of high-rise buildings in Xi′an. There are sand layers with good engineering geological properties in some regions of Xi′an, and the foundation of such sand layers has high bearing capacity and low compressibility. Taking a 96-15m high 33-layer building as an example, the in-situ plate lading tests were carried out. Through analyses of foundation bearing capacity checking, weak underlying layer checking, foundation deformation checking and settlement observation, it can be concluded that it′s feasible to adopt medium\|fine sand layer as natural foundation of high-rise building.

Keywords: medium-fine sand; natural foundation; high-rise building; bearing layer

作者简介：苗长春，硕士，高级工程师，一级注册结构工程师，Email:component382@163.com。