EARTH PRESSURES ON OTTAWA•OUTFALL SEWER TUNNEL
EARTH PRESSURES ON OTTAWA•OUTFALL SEWER TUNNEL
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渥太华•排水隧道的土压
DOI：
10.1139/t69-003
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发表时间：
1969
影响因子：
3.6
通讯作者：
M. Bozozuk
中科院分区：
文献类型：
--
作者：
W. J. Eden;M. Bozozuk
在一个10英尺高的平台上测量了地表沉降、压力水平变化和地层压力。穿过渥太华极端敏感和中度固结的LEDA粘土的直径隧道。描述了仪器，并给出了5年的结果，从施工前1年到完工后4年。将测量结果与底特律粘土中类似尺寸隧道的测量结果进行了比较。由于施工方法的原因，有机会对柔性临时钢衬和刚性永久钢筋混凝土衬进行测量。由于粘土的过度固结和施工方法，测量到非常小的表面沉降。隧道对粘土中的测压状态产生了相当大的影响，充当排水池。土压力与以往隧道测量结果一致，垂直土压力接近最大覆压。公司简介
MEASUREMENTS OF SURFACE SETTLEMENT, CHANGES IN PIEZOMETRIC LEVELS AND EARTH PRESSURES WERE UNDERTAKEN ON A 10 FT. DIAMETER TUNNEL THAT PASSED THROUGH EXTREMELY SENSITIVE AND MODERATELY OVER CONSOLIDATED LEDA CLAY IN OTTAWA. THE INSTRUMENTATION IS DESCRIBED, AND THE RESULTS ARE GIVEN FOR A PERIOD OF 5 YEARS, FROM 1 YEAR BEFORE CONSTRUCTION UNTIL 4 YEARS AFTER COMPLETION. RESULTS OF THE MEASUREMENTS ARE COMPARED WITH THOSE OBTAINED FROM A TUNNEL OF SIMILAR SIZE IN DETROIT CLAY. BECAUSE OF THE METHOD OF CONSTRUCTION THERE WAS OPPORTUNITY TO CONDUCT MEASUREMENTS ON BOTH THE RATHER FLEXIBLE TEMPORARY STEEL LINING AND THE MORE RIGID PERMANENT REINFORCED CONCRETE LINING. VERY LITTLE SURFACE SETTLEMENT WAS MEASURED OWING TO OVERCONSOLIDATION OF THE CLAY AND THE METHOD OF CONSTRUCTION. THE TUNNEL HAD CONSIDERABLE INFLUENCE ON THE PIEZOMETRIC REGIME IN THE CLAY, ACTING AS A DRAINAGE SINK. EARTH PRESSURES WERE IN ACCORDANCE WITH PREVIOUS MEASUREMENTS ON TUNNELS, WITH VERTICAL PRESSURES APPROACHING THE FULL OVERBURDEN PRESSURE. /CGRA/