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原文传递 STATIC AND DYNAMIC MEASUREMENTS USING EMBEDDED EARTH PRESSURE CELLS.

题名：	STATIC AND DYNAMIC MEASUREMENTS USING EMBEDDED EARTH PRESSURE CELLS.
作者：	Filz-GM; Brandon-TL
关键词：	LATERAL-EARTH-PRESSURES; RETAINING-WALLS; BACKFILLS-; DYNAMIC-COMPACTOR-FORCES; EMBEDDED-EARTH-PRESSURE-CELLS
摘要：	As part of a research program to study lateral earth pressures on retaining walls, dynamic compactor forces were measured by two methods: (a) a direct instrumentation method that is thought to yield reliable measurements of dynamic compactor forces and (b) taking measurements of embedded earth pressure cell responses that are converted to estimated compactor forces at the ground surface. Comparison of the compactor forces from the two methods disclosed the following: (a) Reflection of seismic waves from the boundaries of the backfill can create a standing wave at the embedded pressure cell location, which may cause pressure cells to overregister. (b) The pressure distribution beneath the base of the compactor can influence the embedded pressure cell readings. (c) Use of a registration ratio of unity resulted in estimated compactor forces that were generally in as good, or better, agreement with the forces measured by the direct instrumentation as when in situ registration ratios were used. During the in situ calibration studies, several factors that can influence the response of embedded pressure cells to static loads were identified: the presence of clods in the backfill can influence pressure cell response, even when the diaphragm size to soil particle size criterion is well satisfied; compaction-induced lateral earth pressures can cause nonlinearity in pressure cell response because of the rotation of lateral stresses; and other factors, such as variations in cell placement conditions, can influence pressure cell results.
总页数：	Transportation Research Record. 1994. (1432) pp86-95 (9 Fig., 2 Tab., 12 Ref.)
报告类型：	科技报告