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采用单管法高压注浆施工技术,完成在河床内砂卵层中桩身周围的防渗和砂卵石的固结,解决了常规施工中所采用的混凝土护壁施工很难解决的高水头、强流砂问题,不但保证了桩基能够以人工成孔进行施工,并且成孔效率以双倍的速度高于单纯以混凝土护壁方式开挖施工,不但保证了工期,又降低了施工成本。本文主要介绍防渗方法的选比、操作工艺等施工技术,以供其它类似工程施工参考。
The single pipe method of high-pressure grouting construction technology to complete the sand and egg layer in the river bed around the pile impermeable and consolidation of sand and gravel to solve the conventional construction of the concrete wall construction is difficult to solve the high head, strong The quicksand problem not only ensures that the pile foundation can be constructed with artificial holes, but also that the hole formation efficiency is doubled faster than simply excavation with the concrete retaining wall, which not only ensures the construction period but also reduces the construction cost. This article introduces the selection of anti-seepage methods, operating techniques and other construction techniques for other similar projects for reference.