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 Wysłany: Pią 14:03, 17 Gru 2010 Temat postu: moncler outlet Runyang Yangtze River Highway Bridg |
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Runyang Yangtze River Highway Bridge, South Suspension Bridge watertight South Anchorage based, design and construction of precipitation
\ A {l water, the most 【curve \.4514524636136237, asked / tj Figure 2 deep well water and pit out of well water level changes observed in Figure 3 precipitation curve Fig.2Curvesofdeepwellextractedwaterandwamrstagefluctuationofobservationwellinpit recording devices Fig.3Automaticcontrolrecordinginstrumentofextractedwamr automatic control system analysis: April 30, 2002, the pit water level has dropped to an absolute elevation a 27.06m, that is more than 1m to the Bottom of the following. At this point, very dry soil pit, wearing shoes can be directly down to the bottom of the pit. can be considered in April 2002 after 30 out of the water are all deep fissure water . according to the actual record data,[link widoczny dla zalogowanych], April 30 after the daily average amount of water is still up from the bedrock is less than 200m. By analogy April 30, 2002 from the bedrock up before the average daily inflow should not be less than 200.4 月 30 days before the normal pumping 76d, crack out of the water should be not less than 200 × 76 = 15200m3. 5 after 1 July should be all the water out of the water for the fracture,[link widoczny dla zalogowanych], total 2887m3. fissure water out of a total of not less than 18087m. pit dewatering of the soil water,[link widoczny dla zalogowanych], 25948-18087 = 7861m,[link widoczny dla zalogowanych], the daily average of about 100m. Of course, this estimate is very rough. not considered due to the rain and other construction and other factors into the pit of water. did not consider the sunny days from pit soil surface evaporation of water. But the design has basically confirmed the prediction: the real from the soil taken out of the water about every 50 ~ 100m or so. Generally speaking, there is no foundation in the original estimate of water inflow large. the average daily extraction gushing crack 2001-i-13 before and after the conclusion of the actual analysis of several conclusions of the survey report estimates the value of the smallest: 188m close to the water inflow. Even if the wall did not completely closed in the permafrost of the question, every day, but also the maximum total displacement of more than 500 m. 3 Conclusions (1) confirmed the initial estimate of the design: the Bottom of the soil water gushing dewatering will be greater than the amount of water, so the precipitation foundation system must be taken simultaneously bedrock fissure water and soil in the water. and to reduce the water pressure of water main fractured. In precipitation design, a full estimate of the possible water inflow at the bottom is very important. (2) the level of impervious foundation conditions, vacuum tube on the well deep well point with a new simplified estimation method works, it is quite good results with the measured degree of agreement. (3) points in the vacuum of deep well design,[link widoczny dla zalogowanych], construction, well construction side of the sand filter layer quality is very important. This is the key to the vacuum really works.
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