钻孔灌注桩施工前必须进行试成孔,通过试成孔,检验钻孔灌注桩旋工技术的参数及钻孔灌注桩施工方案的可行性。然而,在钻孔灌注桩施工过程中,因试成孔是工程之外的工作,有关各方常常忽视之,有的甚至免除了该项工作,常常造成日后工程质量出现隐患、超投资、进度缓慢等现象,给施工企业的信誉造成了不必要的损毁。因此,必须高度重视试成孔者到不可或缺的程序。 Bored piles must be pilot-tested before construction, and the feasibility of drilling parameters for bored pile construction and the construction scheme of bored piles should be verified through trial-forming. However, during the construction of cast-in-place bored piles, due to pilot hole formation is a work outside the project, all parties concerned often neglect, and some even exempt from this work, often resulting in future project quality risks, over-investment, progress Slow and so on, to the credibility of construction companies caused unnecessary damage. Therefore, it is necessary to attach great importance to pilot drilling to indispensable procedures.