排同坳隧道停车区路堑边坡变形监测与分析

排同坳隧道进口停车区路堑边坡是水都线边坡工程中的一个大型高陡边坡。自开挖以来,该边坡的变形逐步加剧。为掌握边坡的运动状态,采用钻孔测斜仪对边坡的深部位移进行监测[1],得到6个钻孔的测斜数据。从这些数据可以看出:该边坡存在一个明显的滑面,位置在上覆土层和下伏基岩的交界面处。滑面贯通,厚约0.5～1.5m。边坡总体安全,但应及早防护,避免雨季来临,造成滑坡。研究该边坡的变形和发展趋势,对水都线其他类似边坡的整治具有重要的意义。

工程测量在建筑施工中的应用探析

工程测量在施工过程中尤为重要,特别是结构测量定位及施工过程中监控量测。本文依据在建工程实例,讲述监控量测在施工过程中的应用。本文通过某地铁车站深基坑围护结构施工过程中现场实际经验,对钻孔灌注桩桩体水平位移监测项目中测斜管的埋设安装、测斜数据采集及处理等方面进行分析。得到了监控量测在施工中的应用,从而为施工参考有着积极的意义。

Back analysis for soil slope based on measuring inclination data

Based on the analysis of several objective functions,a new method was proposed.Firstly,the feature of the inclination curve was analyzed.On this basis,the soil could be divided into several blocks with different displacements and deformations.Then,the method of the soil division was presented,and the characteristic of single soil block was studied.The displacement of the block had two components:sliding and deformation.Moreover,a new objective function was constructed according to the deformation of the soil block.Finally,the sensitivities of the objective functions by traditional method and the new method were calculated,respectively.The result shows that the new objective function is more sensitive to mechanical parameters and the inversion result is close to that obtained by the large direct shear apparatus.So,this method can be used in slope back analysis and its effectiveness is proved.

大安油田优快钻井技术

大安油田是MI能源公司的重点开发区块,随着大开发的战略需要,加速勘探开发步伐。为此,在大安油田开展了优快钻井配套技术的研究,包括钻井测斜数据的精度分析、定向井井眼轨迹设计、钻头选型和钻井液性能,并在实践中广泛应用,取得了很好的成绩。