Details:

Creators:
Baxter, Christopher D. P.
Corporate Creators:
University of Rhode Island
Corporate Contributors:
Rhode Island. Dept. of Transportation. Office of Civil Rights
Subject/TRT Terms:
[+]
Silt--Rhode Island--Testing Soil Liquefaction--Rhode Island Soil Penetration Test Soils--Testing--Rhode Island--Soils--Testing Cone Penetrometers Liquefaction Silts Soil Tests
Publication/ Report Number:
FHWA-RIDOT-RTD-10-1
Resource Type:
Tech Report
Geographical Coverage:
Rhode Island
OCLC Number:
779844063
Edition:
Final.
Corporate Publisher:
Rhode Island. Dept. of Transportation
NTL Classification:
NTL-HIGHWAY/ROAD TRANSPORTATION-Soils and Geology
Abstract:
Most areas of coastal Rhode Island are underlain by thick layers of non-plastic silt and it is important to

know if the existing standard-of-practice liquefaction potential evaluations (e.g. Robertson and Wride (1998) or

Seed et al. (1985)) are accurate. The objective of this research was to critically evaluate the applicability of CPT

and SPT based approaches to Providence silts. This was accomplished through a laboratory testing program

involving the URI mini-cone calibration chamber and cyclic triaxial tests to develop a new relationship between

cyclic resistance ratio and tip resistance for Providence silt. The new relationship was compared to the standard-ofpractice

liquefaction potential evaluation methods from the literature. There was good agreement between the

approaches which shows that the existing field-based CPT methods are applicable to Rhode Island silts. This is

consistent with previous RIDOT funded research on the liquefaction potential evaluation of silts in Rhode Island

(Bradshaw et al. 2007; 2007a; Baxter et al. 2008).

An attempt was also made to evaluate SPT-based approaches in silt using the mini-cone and laboratory

cyclic data. A qc/N60 correlation was evaluated from two loose silt sites in Rhode Island where SPT and CPTs

were performed adjacent to each other. The agreement between blow counts and tip resistance was very poor, most

likely due to the small number of tests and small range of in situ densities. Because of the poor agreement, it was

not possible to directly evaluate the SPT-based liquefaction evaluation approaches in the study.


Format:
PDF
Funding:
SPR-229-2292
Collection(s):
US Transportation Collection
Main Document Checksum:
[+]
urn:sha256:575a434b7fcf4aea0e776d815ef9269b1dfb28fc028d887f6f027945cd7d379b
Download URL:
https://rosap.ntl.bts.gov/view/dot/23895/dot_23895_DS1.pdf
File Type:

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