岩土工程桩基钻孔灌注桩技术分析

Analysis on Pile Foundation Bored Pile Technology in Geotechnical Engineering

常规的岩土工程桩基钻孔灌注桩技术在桩基平面布置中多数采用单桩基布置方式,降低了桩基整体的承载力,导致荷载增加的情况下,桩基沉降位移量较大,岩土工程稳定性得不到保障。基于此,文章以M岩土工程为例,提出了一种全新的桩基钻孔灌注桩技术。首先根据岩土工程实际建设需求计算桩数,采用行列式与梅花式多排桩基础的布置方式,提高桩基承载力。然后埋设护筒,将其作为钻孔测量基准点,在此基础上,设置钻机钻进参数,进行钻孔与灌注操作。由实例分析结果可知,新的技术应用后,在桩基施加荷载逐级增加的情况下,桩基沉降位移量较小,均不超过5 mm,岩土工程的承载性能与稳定性能得到了显著提升。

The conventional pile foundation bored pile technology in geotechnical engineering mostly adopts a single pile foundation layout form in the pile foundation plain layout,which reduces the overall bearing capacity of the pile foundation,resulting in a large settlement displacement of the pile foundation under increased load,and the stability of geotechnical engineering can not be guaranteed.Based on this,this paper takes M geotechnical engineering as an example,and puts forward a new pile foundation bored pile technology.Firstly,the number of piles is calculated according to the actual construction requirements of geotechnical engineering,and the arrangement of multirow pile foundation with the form of determinant and plum blossom is adopted to improve the bearing capacity of pile foundation.Then,the casing is buried as the datum point for drilling measurement.On this basis,the drilling parameters of the drilling rig are set to carry out drilling and grouting operations.It can be seen from the analysis results of the example that after the application of the new technology,the settlement displacement of the pile foundation is small and not more than 5 mm,and the bearing capacity and stability of the geotechnical engineering are significantly improved under the condition that the load applied to the pile foundation is gradually increased.