BIM Assisted Control Technology for Drilling and Filling Karst Caves in Multi Pipeline Sites
To prevent the collapse and other hazards of karst(soil)caves,prior to the construction of subway civil engineering projects,the karst(soil)caves,which are revealed in the detailed survey and are within the scope of construction influence,have been treated in advance.In the complex urban environment of municipal roads with dense karst(soil)caves for supplementary exploration and edge exploration,drilling can easily damage municipal pipelines.After the completion of drilling and edge exploration,when drilling and injecting mortar holes into karst caves,the location of mortar holes is also determined based on the height of individual supplementary exploration and edge exploration columns.The original filling state of the cave and the height of the cave cannot be considered as a whole,and the mortar hole cannot be arranged in the optimal cave filling area,and there is a risk that the mortar cannot be poured when pumping mortar.The standard of grouting volume for karst caves is also analyzed after the actual grouting volume reaches the percentage of the theoretical grouting volume for karst caves,and corresponding measures are taken.However,effective control of grouting volume and grouting quality in karst caves has not been achieved in advance or during the process.In response to the above problems,through UAV oblique photography,the original landform of the construction site was restored,and the underground pipeline model consistent with the site was established.The karst cave supplementary exploration and exploration drilling were integrated with the original landform model and the underground pipeline model,and the position relationship between the drilling hole and the ground obstacle,the drilling hole and the underground pipeline was checked to adjust the drilling position.The original filling state model of the karst cave was established to check with the position of mortar drilling,and the mortar hole and vent hole were adjusted to the optimal position of mortar filling for filling.Through the real statistics of the amount of grouting mortar in the cave and the simulation of the flow state of the mortar,the filling amount and filling quality of the mortar in the cave are controlled.
underground engineeringbuilding information modeling(BIM)pipelineskarst cavedrillinggrouting
万方数据
维普
