In concrete construction, in order to ensure the accuracy of the structural appearance size and prevent the problems of demoulding and die expansion, we adopted the tie rod reinforcement scheme. The tie rod is sheathed with PVC casing, which needs to be cleaned after the construction. In order to ensure the appearance quality and waterproof performance of the structure, we have formulated a strict construction scheme.

Pull rod hole cleaning

After the concrete reaches the formwork removal strength, the steel formwork shall be removed in the specified order, and the tie rod bolts shall be removed first. Immediately after formwork removal, pull out the tie rod to make it flush with the PVC sleeve, then cut off the exposed sleeve and clean up the sundries in the PVC sleeve.

building technology

After wet cleaning at the grass-roots level, fill the tie rod hole with polymer cement mortar, and press the back layer with iron trowel after initial setting. Mortar filling adopts self-made mortar horizontal guide groove and filling rod. First, fill the middle PVC pipe. After reaching a certain strength, detect water seepage. After passing the test, cover the surface and smooth the surface. After plugging is completed, it needs to be cured for more than 7 days.

Matters needing attention in construction

When removing PVC casing, avoid damaging concrete structure; Control the consistency of mortar to meet the construction requirements; When plugging, the force should be even, and the plugging and compaction should be carried out in several times; Before plugging and unplugging, the sundries in the PVC sleeve must be cleaned up.