金浦枣林c地块基坑支护设计(附件)【字数:17966】
桩为围护结构,两道内支撑为支撑结构。这些就是完整的结构方案。
目 录
ABSTRACT
This graduation project combines the jinpu zaolin plot square construction project, carries on the foundation pit support design to this square.
In this foundation pit support design, according to the geological information given in the geological survey report and the foundation pit data, through the comparison of various schemes, we can choose a reasonable support scheme, the pile row support system is suitable for the jinpu zaolin block. Then according to the selected scheme of foundation pit support structure system calculation, check its stability, according to the construction code to calculate the internal force, bending moment. The structural design and checking calculation of concrete castinplace pile are carried out to determine the diameter and reinforcement of pile. Then, the safety and stability of the foundation pit is guaranteed by the computer check of the software. This foundation pit adopts the scheme of pile row and internal support. Bored castinplace pile is the surrounding structure and two internal supports are the supporting structure. These are the full structural solutions.
Keywords: foundation pit support design; Bored pile; In the support; The stability of
第一章 工程概况
1.1 工程概况
金浦枣林项目基坑工程位于南京市栖霞区燕子矶新城枣林村区域内,北临太新路,南至松花江路,东至经五路,西至钟燕东路。该项目主要分为C、D两个子项目,为商住混合用地,总用地面积39862.51㎡。根据建筑主体结构规划设计方案,该项目建筑规划容积率为3.2,建筑高度99.5米,建筑密度22.75%,绿地率为32%。本次毕业设计对C区进行基坑围护设计,C区基坑实际挖深约11.5米,开挖面积18050平方米,属于深大基坑。
1.2工程地质条件
根据项目工程地质勘察报告,地形平坦,地面高程约为9.38~10.45m左右。场地地层在钻探深度内按成因自上而下可分为:第四系人工填土、粉土、淤泥质土、粉砂,各土层主要性质如下:
①1杂填土:杂色,松散,以碎砖、混凝土块填积,混粉质粘土,层厚约为0.5~4.0m;
①2素填土:灰黄~灰色,软~可塑,局部可塑,夹少量碎砖及淤泥质土,埋深0.5~4.0m,厚约0.5~4.3m;
②1粉土~粉砂:灰黄~灰色,稍密,夹少量粉质粘土,层顶埋深约为2.2~8.0m,厚约为1.9~12.1m左右;
②1a淤泥质粉质粘土~淤泥质粉土:灰黄~灰色,流塑,夹薄层粉土,层顶埋深约为4.0~12.2m,厚约为0.8~7.8m左右;
②2粉细砂层:灰色,稍密~中密,局部为粉土,层顶埋深约为8.2~15.8m,厚约为1.0~10.3m左右。
②3 淤泥质粉质粘土:灰色,流塑,局部为粉质粘土,层顶埋深约为10.2~19.8m,厚约为0.5~22.4m左右;
②4粉质粘土:灰色,软~可塑,层顶埋深约为19.5~32.6m,厚约为0.8~15.8m左右。
场地地下水为浅层潜水,地下水位在地面以下3米左右,水量较为丰富。
各土层具体物理力学指标如下表:
土层
重度
(kN/m3)
直剪固快
渗透系数
(kPa)
φ(度)
KV(×106cm/s)
KH(×106cm/s)
①1
(18.0)
(5)
(15)
(500)
①2
18.5
(8)
(10)
(200)
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