In order to compare estimated values using plate sinkage and confined compression tests with pre-load applied to the samples, paired t-test was employed.
In the case of plate sinkage test, the over-estimation of precompaction stress for all pre-load levels decreased when the water content increased from 0.
Mosaddeghi MR, Hajabbasi MA, Hemmat A, Alexandrou A (2004) Determination of pre-compaction stress of in situ tractor precompacted soil by plate sinkage and confined compression tests.
Repave the sinking freeway areas with 2 inches of asphalt, to bring the sinkage back within permit levels.
Expand the surveying program used to detect sinkage.
The freeway itself is being checked daily and is safe, but will be closed if additional sinkage creates any danger for commuters, state and MTA officials said.
But to critics of the beleaguered MTA, the sinkage of the Hollywood Freeway is reminiscent of a series of subway-related problems - including a sinkhole along Hollywood Boulevard last June.
Los Angeles Mayor Richard Riordan, a member of the MTA board, said he wasn't aware of the sinkage problem, but has ordered a review and daily reports, said his spokeswoman Noelia Rodriguez.
is almost a year behind and $20 million over budget because of the sinkage
problems blamed in part on the area's loose soil, the Daily News has reported.
Three episodes of ground sinkage last year forced the contractor to add an extra phase to the project - injecting chemical grout into holes bored every few feet along the subway route to stabilize loose, sandy soil.
Indeed, the scene in North Hollywood is reminiscent of disruptions business owners faced from subway tunneling in Hollywood, where Metro Rail work caused ground sinkage and opened a large sinkhole in Hollywood Boulevard.