The rain period grouting material construction quality control

The impact of rainfall grouting material of concrete pouring 1, concrete grouting material mixture occur disorder. Rain, often leading to a huge increase in water content of aggregate deposited in the open air, especially in the sand, change the most. Weighing blanking, if still continue to use the original concrete grouting material mixture ratio, sand ratio may occur decreases, water cement ratio increases, and the wave instability, so that produce concrete grouting material strength value is low and numerical discrete. 2, concrete grouting material on the surface of slurry erosion. Concrete grouting material in the rain, because rainwater into, make the slurry drained away with the rain, exposed aggregate, concrete grouting segregation, and vibrating the concrete grouting material to meet the rain of the slurry after washed, the former may cause the hole, the latter may appear pits. 3, stranded rain do not row, holes, reinforcement concrete grouting material. Concrete grouting material casting field if poor drainage, some low-lying place template may be water, leading to concrete grouting material to produce holes, exposure, etc. , such as the underlying core barrel elevator pit, collecting well, shear walls, etc. 4, operational difficulties in the rain. Rainfall process, the open job workers in rain, and the line of sight is not clear, the foot slippery, easy to fall accident, the usual requirement is difficult to perform, concrete grouting material is not dense, affect the concrete strength of grouting material. The permeability resistance and durability. 1, the content of the construction quality plan in advance. Scheduling, on the total construction progress plan, we should pay attention to division project completed in expected before, the basis of arrangements to prevent the expected in foundation pit construction, the foundation pit slope shower as soon as possible to eliminate the possibility of landslide. In the main body of concrete grouting material engineering into the rain, should pay close attention to the weather forecast, recent work, according to the arrangement of the observatory have moderate rain, heavy rain not arrange concrete grouting material casting. 2, material preparation. Rainy season rain goods should be shipped to concrete grouting material casting, raincoat, rain sent to workers, machinery and equipment for rain cover, assign personnel to inspect at the same time. Technical measures. Technical personnel shall prepare the rain period concrete grouting material casting, detailed construction operation personnel disclosure, and supervise their earnest implementation. 3, matter controls. Concrete grouting material casting process, the management should be prepared. When there is a rain check 1, site temporary response to the following content has plenty of rain wear, already pouring concrete grouting material surface is covered in a timely manner. 2, too much rain should immediately stop the concrete grouting material construction, heavy rain continuous time if too long, should do well in construction joint treatment. If rainfall is not big, can continue to construction for concrete mixing station to reduce grouting material of mixture slump, and extend the applicator, stirring time, generally can concrete grouting material can prolong 30 s. Concrete grouting material casting, casting width should not be more than 1 at a time. 5m。 3, timing, quantitative determination of concrete grouting material mixture slump and the moisture content of sand, timely adjust the mixing proportion. 4, post-processing. Check has been pouring concrete grouting material, see concrete grouting material surface had rain wash pulp phenomenon. Template is dismantled, examined for pits. Holes, exposure, etc. , should look for reason, if there is a timely treatment scheme is put forward. Recorded, the research on the problems one by one, summary, summing up experience, put an end to appear again.