本场地地貌单元属太湖水网平原区，高亢平原地带。2.4地基土的特征及工程

The geomorphic unit of this site belongs to the Taihu Lake water network plain area, high-pitched plain area. <br>2.4 Evaluation of the characteristics and engineering characteristics of the foundation soil <br>. The soil layer within the survey depth range of the proposed site belongs to the Taihu water network plain area and the high-pitched plain area. According to field exploration, in-situ testing, combined with geotechnical test data, according to its genesis, sedimentary environment and soil The engineering geological characteristics of the layer are divided into six engineering geological layers from top to bottom, and one engineering geological sublayer. The composition of the foundation soil, the burying conditions, and the geotechnical characteristics are described as follows: <br>① Plain fill: grayish yellow to gray, structure Loose. <br>The main ingredient is silty clay, containing plant rhizomes, wormholes, and poor soil uniformity. <br>② Silty clay with clay silt: gray-yellow to gray, silty clay, soft plastic to plastic state, with a small amount of iron and manganese oxides, slightly higher powder content; clay silt, slightly dense to medium dense state , Wet ~ very wet, containing a small amount of quartz debris and mica flakes, the soil layer uniformity is average. <br>③Mucky silty clay: gray, flowing plastic state, slightly odor, containing a small amount of organic matter, the content of organic matter in the field identification is generally less than 5%, with soft plastic state silty clay, the local powdery content is slightly higher, and a small amount of thinner Clay silt with slightly dense layer, moderate to moderately low toughness, medium to moderately low dry strength, dull response, no shaking response, and average soil layer uniformity. <br>Most of the site is covered, and the layer thickness varies greatly, and the bottom slope of the layer is large. <br>④ Silty clay: gray-yellow, plastic to hard plastic state, containing iron, manganese oxide and its nodules, the bottom powder content is slightly higher, the dry strength is medium, the toughness is medium, the glossy reaction, and the soil layer has good uniformity. <br>⑤Sandy silt mixed with silt: blue gray to grayish yellow. <br>Sandy silt, very wet, slightly dense to medium dense state, partially mixed with a small amount of clay silt and soft plastic to plastic silty clay; silt, saturated, medium dense state mainly, the main mineral component is broken quartz Chips, containing more mica flakes, the uniformity of the soil layer is average. <br>⑥ Silt: blue-gray to gray-yellow, saturated and dense, the main mineral component is quartz debris, contains more mica flakes, and the soil layer has good uniformity. <br>⑥1 Sandy silt soil with silty clay: gray, partially grayish yellow.<br>Sandy silt, slightly dense to medium dense state, wet to very wet, containing a small amount of quartz debris and mica flakes, with a slightly dense to medium dense silt layer; silty clay, mainly soft plastic state, silty content high. <br>The toughness is medium to low, the dry strength is medium to low, the response is dull, the shaking response is medium, and the soil layer uniformity is average. <br>2.5 The recommended value of the characteristic value of the bearing capacity of the foundation and the characteristic value of the bearing capacity of the foundation soil in the foundation scheme <br>. The characteristic value of the bearing capacity of the foundation soil is determined according to the indoor geotechnical test results and the experience of Jiangyin area: the characteristic value table of the bearing capacity of each soil layer (preliminary)

The geomorphological unit of this site belongs to the plain area of Taihu water network and the plain area of Sorghum.<br>2.4 Evaluation of the characteristics and engineering characteristics of the foundation soil<br>The soil layer within the survey depth of the proposed site belongs to the Taihu water network plain area, the sorghum plain area, according to the field exploration, in-place testing, combined with geo-test data, according to its origin, sedimentary environment and the engineering geological characteristics of the soil layer, from top to bottom are divided into six engineering geological layers, one engineering geological subsequifer, foundation soil composition, burial conditions, geo-earth characteristics are described as follows:<br>(1) Vegetarian filling: gray-yellow to gray, loose structure.<br>The main contents are powder clay, including plant roots, wormholes, soil uniformity is poor.<br>(2) Powder clay clip clay: gray yellow to gray, powder clay, soft plastic to plastic state, containing a small amount of iron manganese oxide, powder content slightly higher;<br>(3) Silt powder clay: gray, fluid plastic state, slightly odor, containing a small amount of organic matter, on-site identification of organic matter content is generally less than 5%, with soft plastic state powder clay, local powder content slightly higher, a small amount of thin layer slightly dense state clay, moderate to medium low, dry strength medium to medium low, no gloss reaction, no shaking reaction, soil uniformity.<br>Most of the site cloth, and the thickness of the layer changes greatly, the bottom slope of the layer is large.<br>(4) Powder clay: grayish yellow, plastic to hard plastic state, iron manganese oxides and their nobies, layer base powder content slightly higher, dry strength medium, medium toughness, glossy reaction, soil uniformity is good.<br>(5) Sand powder sand: green-grey to gray-yellow.<br>Sand powder, very wet, slightly dense to medium-tight state, local clip has a small amount of viscous powder soil and soft plastic-plastic powder clay;<br>(6) powder sand: blue-grey to gray-yellow, saturated, dense state-based, the main mineral composition is quartz debris, containing more mica flakes, soil layer uniformity is good.<br>(6)1 Sandy powder sandwich powder clay: gray, local gray-yellow.<br>Sandy powder, slightly dense to medium-tight state, wet to very wet, containing a small amount of quartz debris and mica flakes, clamped slightly dense to medium-dense state powder sand layer;<br>The toughness is medium low, the dry strength is medium low, the glossy reaction is medium, the shaking reaction is medium, and the soil layer uniformity is general.<br>2.5 The recommended value of the base carrying capacity feature value and the foundation base scheme<br>The carrying capacity characteristic value of the base soil in various places fak is determined by the comprehensive consideration of indoor earthworking test results and the experience of Jiangyin area: the load bearing capacity characteristic value table of each soil layer (preliminary)

The geomorphic unit of the site belongs to Taihu Lake water network plain area and Gaokang plain area.<br>2.4 characteristics of foundation soil and evaluation of engineering characteristics<br>The soil layer within the survey depth of the proposed site belongs to Taihu Lake water network plain area and Gaokang plain area. According to the field exploration, in-situ test and geotechnical test data, according to its genesis, sedimentary environment and engineering geological characteristics of soil layer, it is divided into six engineering geological layers from top to bottom, one engineering geological sub layer. The composition of foundation soil, burial conditions and geotechnical characteristics are described as follows:<br>① Plain fill: grayish yellow to gray with loose structure.<br>It is mainly composed of silty clay, containing plant roots and wormholes, with poor soil uniformity.<br>② Silty clay mixed with clayey silt: grayish yellow ~ gray, silty clay, soft plastic ~ plastic state, containing a small amount of ferromanganese oxide, slightly high silty content; clayey silt, slightly dense ~ medium dense state, wet ~ very wet, containing a small amount of quartz debris and mica flakes, with uniform soil layer.<br>③ Mucky silty clay: gray, flowing plastic state, slightly smelly, containing a small amount of organic matter. The organic matter content identified on site is generally less than 5%, mixed with soft plastic state silty clay, with a small amount of thin layer of slightly dense clay silt, medium to medium low toughness, medium to medium low dry strength, no gloss reaction, no shaking response, and soil uniformity General.<br>Most of the sites are distributed, and the layer thickness changes greatly, and the bottom slope is large.<br>④ Silty clay: grayish yellow, plastic to hard plastic state, containing iron and manganese oxides and their nodules, slightly higher silty content at the bottom of the layer, medium dry strength, medium toughness, glossy reaction, and good soil uniformity.<br>⑤ Sandy silt with silt: greenish grey to grayish yellow.<br>Sandy silt, very wet, slightly dense to medium dense, with a small amount of clayey silt and soft plastic plastic plastic silty clay locally; silty sand, saturated and medium dense, mainly composed of quartz debris, containing more mica flakes, with general soil uniformity.<br>⑥ Silt: Turquoise gray to grayish yellow, saturated and dense, mainly composed of quartz detritus, containing more mica flakes, with good soil uniformity.<br>⑥ 1. Sandy Silt Mixed with silty clay: gray, partial grayish yellow.<br>Sandy silt, slightly dense to medium dense, wet to very wet, containing a small amount of quartz debris and mica flakes, intercalated with slightly dense to medium dense silty sand layer; silty clay, mainly in soft plastic state, with high silty content.<br>The results show that the toughness is medium and low, the dry strength is medium and low, the gloss response is moderate, the shaking response is medium, and the soil layer uniformity is general.<br>2.5 recommended value of characteristic value of foundation bearing capacity and foundation scheme<br>The characteristic value FAK of bearing capacity of foundation soil is determined according to the results of indoor geotechnical test and the experience of Jiangyin area: table of characteristic values of bearing capacity of each soil layer (Preliminary)<br>