CAJ | 학술논문

为有效防范施工中的钢管脚手架倒塌，最大限度地减小人员伤亡和财产损失，介绍一种新型碗扣式钢管脚手架位移监测系统的研制原理及组成。以马鞍山长江公路大桥施工中的碗扣式脚手架为实际工程背景，为临时支撑40 m 跨度整体式箱梁的钢管脚手架设置施工过程中的位移监控系统。通过提取脚手架临时结构的第一阶屈曲模态，考虑初始缺陷的影响，进行几何非线性全过程分析和设计荷载位移计算，给出碗扣式钢管脚手架位移监测系统所需分级预警值。通过在碗扣式钢管脚手架关键部位布设激光发射器，求取激光发射器所发射激光投射在固定参考坐标系内轨迹的变化，获得碗扣式钢管脚手架关键部位的水平方向和竖直方向位移，该系统可通过无线网络将信号传递至管控中心的 PC 终端。研究表明，新型碗扣式钢管脚手架位移监测系统为支架工程的倒塌预警工作提供了一种可行的方案，且具有操作简单、成本可控之优点。
위유효방범시공중적강관각수가도탑，최대한도지감소인원상망화재산손실，개소일충신형완구식강관각수가위이감측계통적연제원리급조성。이마안산장강공로대교시공중적완구식각수가위실제공정배경，위림시지탱40 m 과도정체식상량적강관각수가설치시공과정중적위이감공계통。통과제취각수가림시결구적제일계굴곡모태，고필초시결함적영향，진행궤하비선성전과정분석화설계하재위이계산，급출완구식강관각수가위이감측계통소수분급예경치。통과재완구식강관각수가관건부위포설격광발사기，구취격광발사기소발사격광투사재고정삼고좌표계내궤적적변화，획득완구식강관각수가관건부위적수평방향화수직방향위이，해계통가통과무선망락장신호전체지관공중심적 PC 종단。연구표명，신형완구식강관각수가위이감측계통위지가공정적도탑예경공작제공료일충가행적방안，차구유조작간단、성본가공지우점。
In case of tubular steel scaffold collapse under construction,a new displacement monito-ring system of tubular steel scaffold with cuplok joint is introduced to minimize casualties and property losses.The tubular steel scaffold of a 40 meters long box girder in Maanshan Yangtze River Bridge is taken as an example to propagate structural geometry nonlinear analysis and displacement calculation un-der design load through scaling and superimposing the lowest eighenmode onto the perfect geometry to create an initial imperfection for displacement graded threshold value.Laser transmitters which are placed in key positions of the tubular steel scaffold are used for trajectory tracking to obtain horizontal and verti-cal displacements by the reference coordinate system.System signals are transmitted through wireless net-work to PC terminal in control center.It is shown that the new displacement monitoring system of tubular steel scaffold with cuplok joint is practical and feasible with simple operation and controllable costance.