地铁车辆段整体上盖工程勘察工作实录

黄星

摘 要：结合浙江杭州地铁7号线盈中车辆段上盖开发要求，针对其规模大、上盖高层建筑群柱网间距大、对结构的沉降和差异沉降敏感、地下室面积大以及基坑开挖深度大的特点，根据场区浅层沼气及软土发育的特征，开展原位测试工作。采用静探改装的专用装置查明了沼气的分布及特性，并针对软基、桩基工程、基坑工程以及场线工程等不同性质工程采取相应的勘察措施。此外，采用薄壁取土器确保土样质量，加强了静力触探、动力触探以及K30板等原位测试工作并进行了专项水文地质试验，取得了较好的效果，积累了相应的勘察经验。

关键词：地铁;车辆段;整体上盖;勘察工作;沼气

中图分类号：U231 文献标识码：A 文章编号：1003-5168（2021）25-0077-06

Actual Record of Investigation Work of Overall Upper Cover Engineering of Metro Depot

HUANG Xing

（Shanghai Municipal Engineering Design Institute（Group）Co.， Ltd.， Shanghai 200092）

Abstract： Combined with the development requirements of the upper cover of Yingzhong depot of Hangzhou Metro Line 7， in view of its large scale， large column grid spacing of the upper cover high-rise buildings， high requirements for structural settlement and differential settlement control， large basement area and large excavation depth of the foundation pit， and the development characteristics of shallow biogas and soft soil in the site. This paper attaches importance to the in-situ test， the special device modified by static sounding was used to find out the distribution and characteristics of biogas， and targeted survey measures were taken for projects with different properties such as soft foundation， pile foundation engineering， foundation pit engineering and site line engineering. The thin-wall sampler was used to ensure the quality of soil samples， the in-situ tests such as static cone penetration， dynamic cone penetration and K30 plate were strengthened， and special hydrogeological tests were carried out. It has achieved good results and accumulated corresponding exploration experience.

Keywords： metro;depot;overall cover;investigation work;biogas

在城市可用土地資源日益紧张的今天，构建“轨道+物业”资源开发经营新模式，可以实现轨道交通的可持续发展。如在地铁车辆段上盖开发项目能够集约土地资源，达到复合利用空间、集约用地的目的。地铁车辆段一般建设规模大，为大型工程，且上盖高层建筑群高低层层高差异大，工程破坏后果严重，工程重要性等级高。受车辆段首层限界及工艺限制，柱网间距大，单柱荷载大，对结构的沉降和差异沉降敏感，对勘察提出了很高的要求[1]。

1 工程概况

1.1 工程简介

浙江杭州地铁7号线盈中车辆段位于杭州萧山区，杭金衢高速东侧，建设四路北侧，长为670～1 200 m，最大宽度为270 m，占地面积为2.15×105 m2，建筑面积约为3.21×105 m2。依据杭州市政府对地铁车辆基地要求，为了充分发挥轨道交通优势，有利于土地集约利用，各基地需考虑远期开发的要求，因此盈中车辆段需要进行加盖开发。……