兰州市伏龙坪地区黄土的工程地质性质

兰州市伏龙坪地区地面标高高出市区70－80m，表层分布较厚的黄土，一般的工业与民用建筑较少，以简易平房为主。近年来，陆续修建的建筑物，由于对黄土的工程性质认识不够透彻，许多建筑物发生了基础沉陷，墙基开裂等现象。通过对黄土的成因和物质组成分析，及大量的原状土样进行室内土工试验，对黄土的物理力学性质有了一个总体的认识与归纳，尤其是湿陷性的定量分析与评价，为地基与基础的设计与施工提供了较为科学的依据。

THE LOESSIAL GEOLOGICAL PROPERTY IN FULONGPING DISTRICT OF LANZHOU CITY

The ground level in Fulongping district of Lanzhou city is seventy to eighty meters above the ground level of Lanzhou's urban district. The great thick loess is distributed over this district. The houses are nearly all simple and one-storied, with few industrial and civil buildings. In recent years, as the peolpe don't know enough about the geological property of the loess, a lot of buildings have emerged with sinking foundations, wall rending, and so on. By analysisng the formation of the loess and its material composition and by doing some soil laboratory experiments with lots of undisturbed samples, the authors have got a general view of the physical and mechanical properties of the loess Especially by quantitative analysis and assessment of the lossial collapsibility, scientific proofs are ample for the design and construction of foundation and footing.