CAJ | 학술논문

依托宁波地区某主干道周边基坑地下连续墙施工工点，通过现场取样测试土体动三轴下强度指标；采用三维有限元数值模拟判别交通和施工超载作用下槽壁整体失稳模式；并以槽壁外侧土体达到剪切塑性极限为临界条件，采用极限平衡法，推导单一土层内一字型地下连续墙槽壁整体失稳的判定公式。研究结果表明：地下连续墙槽壁呈现类似四棱锥形整体失稳形态；护壁泥浆出现补充不及时或漏浆时，槽壁将发生整体失稳破坏。
의탁저파지구모주간도주변기갱지하련속장시공공점，통과현장취양측시토체동삼축하강도지표；채용삼유유한원수치모의판별교통화시공초재작용하조벽정체실은모식；병이조벽외측토체체도전절소성겁한위림계조건，채용겁한평형법，추도단일토층내일자형지하련속장조벽정체실은적판정공식。연구결과표명：지하련속장조벽정현유사사릉추형정체실은형태；호벽니장출현보충불급시혹루장시，조벽장발생정체실은파배。
Based on an underground continuous wall construction worksite near the main road in Ningbo city, this study tested the soil dynamic strength index through field sampling and analyzed the integral buckling mode of trench wall under overload transportation and construction by 3D finite element numerical simulation. Assuming it would reach critical conditions when the tank wall of the lateral soil achieved the shear plastic limit, the study used the limit equilibrium method and deduced the overall decision formula of instability of the slurry trench of under?ground continuous wall on a single soil layer. The findings indicate that overall instability presents class-four sprayed failure pattern and overall instability would appear when the supporting slurry lagged behind or had leakage.