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会宁位于甘肃省中部,气候类型属于典型的黄土高原温带半干旱气候,年降雨量少、蒸发量大,由于特殊的气候条件,该区地表沉积有巨厚的黄土,该黄土具有湿陷性。本文基于作者多年大量的会宁县城段祖历河阶地勘察实际资料,结合地势、地貌和沉积特征,从空间分布、物理力学性质等方面,系统总结了祖历河阶地的岩土工程地质特性,并从场地建筑持力层的选择、地基的处理和基础类型的确定等方面进行了岩土工程对策分析研究,以便为城市的开发和合理利用提供帮助。
Ningxiang will be located in the central part of Gansu Province. The climate type belongs to typical temperate and semi-arid climate on the Loess Plateau with less annual rainfall and large evaporation. Because of the special climatic conditions, the surface sediment of this area is very thick loess which has collapsibility . In this paper, based on the author’s many years of practical data of the Zulu river terrace in the county section of Huining county, the geotechnical engineering characteristics of the Zulian River terraces were systematically summarized from the aspects of the spatial distribution, physical and mechanical properties and the characteristics of topography, geomorphology and sedimentation. The selection of the stratum for building site, the treatment of foundations and the determination of the foundation types, etc. The geotechnical engineering countermeasures and researches are carried out so as to help the development and rational utilization of the city.