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工程地质勘察是工程建设的首要阶段,其勘察成果是基础设计的主要依据之一。我国地域辽阔,地质情况复杂多变,从沿海到内地,由山区到平原分布着多种多样的地基土,这些不同成因沉积的土的工程特性差异很大,特别是土的压缩性指标、抗剪强度指标,孔隙比、含水量及液性指数等指标差别较大。因此,在工程地质勘察中查明其成因类型、分布规律、埋藏条件及其土的性质,针对各种复杂的工程地质条件,在保证工程设计和工程建设质量的前提下,充分挖掘地基土的潜力,合理地选择地基与基础设计方案,可降低工程造价,缩短建设工期。本文分析了各种成因不良土质的工程地质特性,提出了针对不同的工程地质条件合理地选择地基方案。
Engineering geological survey is the first stage of engineering construction. The survey results are one of the main basis for basic design. Our country has a vast territory and complex and varied geological conditions. From the coast to the inland, a variety of foundation soils are distributed from the mountains to the plains. The engineering characteristics of these different sedimentary soils vary greatly, especially the compressibility index of the soil and its resistance. The shear strength index, porosity ratio, water content, and liquidity index are quite different. Therefore, in the engineering geological survey, the types, distribution rules, burial conditions, and soil properties of the founder were ascertained. Under the premise of ensuring the quality of the engineering design and construction, the foundation soil was fully excavated for various complicated engineering geological conditions. The potential to rationally select foundations and foundation design schemes can reduce the project cost and shorten the construction period. This paper analyzes the engineering geological characteristics of various poorly-caused soils and proposes a rational selection of ground-based plans for different engineering geological conditions.