某水电站地下厂房优质混凝土施工技术探讨

2020-08-03 06:54:33何锋
价值工程 2020年21期

何锋

摘要:优质混凝土就是直接利用混凝土成型后的自然质感,通过增加“倒角、T型”装饰条作为饰面效果,表面外观不进行或简单进行处理后,使其达到免装修效果的混凝土工程。优质混凝土工程中的模板、钢筋、砼浇筑、外观工序均纳入主控项目,质量等级满足优良标准。施工中应尽量避免出现表面蜂窝、麻面、露筋、夹渣等缺陷,做到表面平整、光洁、色泽均匀,使混凝土自身成型后的质感达到免装修效果。

Abstract: High-quality concrete is a concrete project that directly utilizes the natural texture of the concrete after forming. By adding"chamfering, T-shaped" decorative strips as a decorative effect, the surface appearance is not processed or simply processed to achieve a decoration-free concrete project. The formwork, reinforcement, concrete pouring, and appearance procedures in high-quality concrete projects are all included in the main control project, and the quality level meets the excellent standards. During construction, defects such as honeycomb, pitted surface, exposed tendons, and slag inclusions should be avoided as far as possible, so that the surface is level, smooth, and uniform in color, so that the texture of the concrete itself can be free of decoration effects.

關键词:优质混凝土;自然质感;优良标准;免装修;参考价值

Key words: high-quality concrete;natural texture;good standard;free decoration;reference value

中图分类号:TV544                                       文献标识码:A                                  文章编号:1006-4311(2020)21-0129-04

1  研究背景

某水电站枢纽为二等大(2)型工程,以发电为主, 4台机组总装机容量990MW。建管局要求对主厂房蜗壳-发电机层的柱、梁,主变室的柱、梁及墙,尾调室某高程以上的启闭机排架柱,开关站综合楼的柱、梁等部位结构实施优质混凝土。标准为“混凝土施工的钢筋、模板、砼浇筑、外观工序由一般项目提高到主控项目,质量等级满足优良标准,混凝土外观平整、光洁,无色差,以混凝土自然状态为饰面,强调混凝土的自然表现机理,达到免装修要求”。地下厂房混凝土结构十分复杂,工序繁琐,而优质混凝土实施区域又多为梁、板、柱结构,对混凝土施工工艺要求极高。从施工作业人员选择、模板设计、制作与安装,钢筋制安、砼浇捣、养护及成品保护等诸多施工工艺方面要严格控制和管理。地下厂房混凝土工程量大、工期紧、质量标准高、工艺复杂,成本控制也面临严峻挑战。……

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