BOULDER DETECTION TREATMENT AND CONSTRUCTION METHOD FOR SHIELD TUNNELING OF OLD BUILDING REGION

The present disclosure relates to the technical field of shield construction and, in particular, to a boulder detection treatment and construction method for shield tunneling of an old building region. The method includes the following steps: S1, performing Computer Tomography (CT) scanning detection on a boulder located under a building, and finding out a spatial position and size of the boulder; S2, arranging, according to a CT scanning result, hole sites for drilling the boulders on grounds on two sides of the building; S3, drilling the boulder through drilling equipment and the hole sites for drilling; S4, plugging polyvinyl chloride (PVC) pipes into drill holes after the drilling is completed; S5, grouting a periphery of a shield tunnel through the PVC pipes for pre-reinforcement; and S6, sealing and cleaning the grouted drill holes. The method not only ensures that the boulder hindering the construction can be cleared during shield tunnel construction and will not destroy the building above the shield tunnel, but also reduces the construction costs, shortens the construction period, and improves the construction efficiency of projects.