求助英语翻译

1.
Stone column foundations for a wastewater treatment plant - A case history

Abstract: Vibro-replacement stone columns were chosen over other foundation options for support of a new wastewater treatment plant at a site underlain by 5 to 15 m of loose fill and soft estuarine sediments. Because the site is located in an area of high seismicity, special field tests and analyses were required during the design phase to assure satisfactory performance. Large-scale field load tests were used for construction control. Settlement estimates were made following several procedures ranging from empirical, experience-based correlations to finite element analyses. Results indicated that the settlement of the treated foundation should be reduced to about 30 to 50 percent of the settlements that would occur if stone columns were not used. Measured values have been in line with these estimates, and the facility withstood without damage in 1978 a Richter magnitude 51 earthquake which generated ground accelerations up to 0.3 g.

2.
Settlements in a building with micropile foundations

Abstract: A wastewater treatment plant was constructed in Bilbao, Spain, in a zone of preloaded alluvial deposits containing a thick layer of steel furnace slag. The project was carried out by lowering the existing fills so that the net load transmitted by the buildings would not aggravate the previous load situation of the soil involved. This condition was met in practice in all the structures except for the Operation and Control Building located half over preloaded soil and half over an unconsolidated area. Micropiles were used as the foundation of the building, but then a 2-m high fill was applied in the area not previously loaded, which caused the ground to consolidate and a considerable negative friction to develop in the micropiles, setting off movement in the building which is described in detail in this paper. (1 refs.)

3.
Settlements of a preloading embankment on PV drain-improved Chewelah clay

Abstract: Embankment preloading, in conjunction with prefabricated vertical (PV) drains, was used to accelerate primary consolidation and to eliminate most of the anticipated secondary settlements of the soft clay foundation due to loading from a proposed wastewater treatment plant (WWTP). Subsurface exploration conducted during preliminary design indicated the presence of up to 60-m thick deposit of soft to very soft clay underlying the site. Estimates of settlement due to filling of the existing lagoon and construction of the WWTP indicated that the soft clay deposits will undergo up to 150 cm of settlement. Approximately 80 cm of this settlement was estimated to occur in the first 10 years of the plant operation and an additional 60 cm was estimated to occur during the following 30 years. UP to 19 settlement plates were installed under the embankment fill to monitor the preload performance. The measured settlements were then used to analyze the behavior of the soft clay foundation, and to develop recommendations regarding the time for preload removal and subsequent construction of the proposed WWTP. This paper discusses the results of settlement analyses and highlights the procedure that was used to predict the magnitude and time-rate of settlements based on field measurements. (13 refs.)
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