张吉星

摘 要：煤矿井下大断面硐室在锚网喷支护后进行二次混凝土衬砌施工，但对于水泵房、主运输通道等断面较大、跨度较长的硐室，如果采用传统的混凝土衬砌方式，就需要搭建脚手架和作业平台，操作复杂且工期较长，而使用钢模台车施工作业方便，混凝土衬砌结构牢固。本文介绍了大断面硐室混凝土衬砌常规施工方案，并且阐述了钢模台车浇筑、衬砌施工技术，旨在营造安全的井下作业环境。

关键词：大断面;硐室;钢模台车;衬砌

中图分类号：TV544文献标识码：A文章编号：1003-5168（2020）17-0115-02

Application of Construction Technology of Concrete Lining of Steel Mould Trolley in Large Section Chamber

ZHANG Jixing

（Henan Jinyuan Construction Co.， Ltd.， Zhengzhou Coal Industry （Group） Co.， Ltd.，Zhengzhou Henan 450042）

Abstract： The large-scale chamber in the underground of the coal mine is constructed with secondary concrete lining after being supported by bolting and meshing， however， for the chambers with large cross-sections and long spans， such as pump houses and main transportation passages， if the traditional concrete lining method is adopted， it is necessary to build scaffolding and working platforms， which are complicated to operate and have long construction periods， the use of steel mold trolley construction is convenient， and the concrete lining structure is firm. This paper introduced the conventional construction plan of large-section concrete lining of chamber， and explained the construction technology of steel mould trolley pouring and lining， aiming to create a safe underground working environment.

Keywords： large section;chamber;steel mold trolley;lining

礦山工程大断面硐室（如井下主排水泵房、中央变电所等）一般在一次锚网喷支护后都要进行二次混凝土衬砌施工。对于此类大断面混凝土衬砌，常先采用组合模板进行墙部混凝土施工，然后采用型钢碹胎槽钢模板进行顶拱混凝土施工。但对于大硐室主排水泵房、主运输通道等大断面硐室，该方法投入劳动力多，材料消耗大，施工质量控制困难，施工进度也难以保证。采用钢模台车技术施工的大硐室二次衬砌混凝土表面平整光滑，工序操作简单，施工速度快，安全性高，用人少，经济效益好[1]。钢模台车是依靠自身的结构强度承载浇筑混凝土产生的荷载，优化了施工工序，节省了大量脚手架管搭拆工作量，降低了模板加固的人工成本、材料成本及时间成本。浇筑的混凝土整体性好，质量可靠，避免了小模板施工的模板拼缝、错台、变形。

1 大断面硐室混凝土衬砌常规施工方案