Quality Control of Cement Soil and Plastic Concrete Impervious Wall
In order to check the quality of dam foundation cement soil and plastic concrete seepage prevention wall, whether the anti-seepage wall construction is continuous, whether there are cracks, voids, cracks and other uneven phenomena in the wall body, in a certain year, the testing center conducts on-site drilling core taking chamber test and drilling. Pore pressure water test, non-destructive testing of geological radar, and detailed test data. The main contents of the anti-seepage wall are compressive strength, permeability coefficient and allowable penetration ratio. The core material is found to be substantially uniform and complete by drilling, and some of the core materials are dense, non-cellular, non-porous, and some have small holes. But there are no large holes, no broken walls, no big mud. The results of inspection of core wall of dam foundation anti-seepage wall and in-situ inspection results of borehole impermeability of dam foundation anti-seepage wall.
Defect of cement soil and plastic concrete seepage prevention wall
After the geological radar repeatedly detected and analyzed the 11 abnormal parts, except 5+425, 4+750, 4+430, except for other abnormal parts, the in-depth excavation inspection was carried out by the owner, the supervisor, etc. Part inspection, in addition to 5 + 580 with mud joints and 5 + 466 wall discontinuities respectively to meet the requirements, the other six parts after the excavation of the wall is smooth, continuous, smooth, in line with quality requirements. In the excavation of 5+440.55+462 anti-seepage wall trough, the grab is buried in the trough. After design and supervision, the deep-mixing pile method is used to form the curved wall protruding to the reservoir area. The cut-off walls are connected in one piece.
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