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Strengthen the settlement observation of nearby pipeline
Strengthen the settlement observation of nearby pipeline, timely data, ensure safety.
12, found that the surface monitoring records, buildings and pipelines around are abnormal, with analyzing, precipitation, when it is necessary to stop for reinforcement.
6.2.2.6.2.4 dewatering well control operation
6.2.2.6.2.4.1 precipitation test run
Before starting the precipitation operation, accurate determination of the wellhead and the ground elevation, the determination of static water level, arrange pumping equipment, cables and pipes for the commissioning, to ensure that the water pumping system in good condition. Out of the water should be in the area around the drain, and then discharged into the municipal pipeline outside, so as not to take water in situ permeability, influence precipitation effect, shall be immediately discharge of rain water in pit digging unit outside the pit, to minimize infiltration of atmospheric precipitation and water in the pit.
6.2.2.6.2.4.2 precipitation formal operation
1, precipitation should run and cooperate with each other, excavation of dewatering well construction excavation and a half months in advance, dewatering well should be after the engineering pile, grouting construction, drainage in dewatering well construction phase should be side edge, namely after completing a few Wells should be take in precipitation and shall ensure that the excavation has about half a month of pumping time, to achieve good results in foundation pit drainage.
2, after the water level to the bottom, can close pump, after waiting for borehole water level rise should be open water pumps.
3, pumping clearance from short to long, each well drained after should stop pump, in order to prevent motor burn out. Rising water levels should immediately after the open pump for water yield larger pumping Wells every day to open pump frequency should be increased.
4, in the stage of excavation of foundation pit of rain water total package units shall promptly send some
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