CAJ | 학술논문

深层水平位移监测通过测量测斜管轴线与铅垂线之间夹角变化量,来获得土、岩石或围护结构内部各深度处水平位移的方法;测斜仪零点偏移误差、测斜管扭角误差和探头导轮误差等是影响精度的几种误差;本文通过误差分析和精度估算,了解常用测斜仪在不同深度的测斜精度以及仪器误差是测斜仪测斜误差的主要来源;研究了基坑有支撑的围护结构、基坑无支撑的围护结构施工、放坡开挖、大面积堆载预压和逆作法施工等实测的典型测斜曲线和变形规律。
심층수평위이감측통과측량측사관축선여연수선지간협각변화량,래획득토、암석혹위호결구내부각심도처수평위이적방법;측사의영점편이오차、측사관뉴각오차화탐두도륜오차등시영향정도적궤충오차;본문통과오차분석화정도고산,료해상용측사의재불동심도적측사정도이급의기오차시측사의측사오차적주요래원;연구료기갱유지탱적위호결구、기갱무지탱적위호결구시공、방파개알、대면적퇴재예압화역작법시공등실측적전형측사곡선화변형규률。
Based on the actual engineering experience of Shanghai Geotechnical Investigation Design Institute,the paper studied typical soil,retaining structure inclinometer curve and deformation law of foundation pit with bracing and retaining structure,foundation pit retaining structure without bracing,grading excavation,large area preloading and reversed construction by means of literature research.Deep Horizontal Displacement Monitoring is monitoring deep horizontal displacement of soil,rock or retaining structure by measuring inclinometer angle variation.Inclinometer zero offset error,inclinometer tube twist angle error and guide wheel of probe accuracy are several errors influencing inclinometry accuracy.It is pointed that we can understand common inclinometer measuring accuracy at different depths,inclinometer instrument error is the main source of testing error and inclinometer error increases gradually with depth based on error analysis and accuracy estimation.