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地下连续墙是在水下(或泥浆下)灌注混凝土。水下灌注混凝土的施工方法主要有刚性导管法和泵送法,根据工程需要进行选择。其中刚性导管法最为常用,其特点是混凝土竖向顺导管下落,利用导管隔离环境水(或泥浆),使其不与混凝土接触,导管内的混凝土依靠自重压挤下部导管出口的混凝土,并在已灌入的混凝土体内流动、扩散上升,最终置换出泥浆,保证混凝土的整体性。以下着重就刚性导管法予以分析。
Underground diaphragm walls are submerged (or under grouted) concrete. Underwater concrete pouring construction methods are mainly rigid catheter method and pumping method, according to project needs to choose. Among them, rigid catheter method is the most commonly used, which is characterized by concrete vertical pipe down, the use of conduit isolation of environmental water (or mud), so that it does not come into contact with the concrete, concrete conduit under pressure squeeze the lower part of the conduit exit concrete, and The poured concrete flows in the body, diffuses and rises, eventually displaces the mud and ensures the integrity of the concrete. The following emphasis on the rigid catheter method be analyzed.