Rotary pressure sounding: 20 years of experience

Rotary pressure sounding: 20 years of experience

157A 903209 Penetration testing application in China Jian-Xin Yuan Proc 1st International Symposium on Penetration Testing, ISOPT-I, Orlando,20-24 Mar...

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157A 903209 Penetration testing application in China Jian-Xin Yuan Proc 1st International Symposium on Penetration Testing, ISOPT-I, Orlando,20-24 March 1988 VI. P389-395. Publ Rotterdam: A A Balkema, 1988

The current status of penetration testing in China is described. SPT and static penetration tests are the most widely used. Applications of the static penetration test for estimation of soil strength, deformability of subsoils, pile capacity, soil classification, collapsibility of loess, and liquefaction potential of sandy soils are discussed. Limitations and possibilities of penetration tests are considered. 903210 Soil characteristics from penetration test results: a comparison between various investigation methods in non-cohesive soils Bergdahk U; Ottosson. E Proc 1st International Symposium on Penetration Testing, ISOPT-I, Orlando,20-24 March 1988 VI, P399-405. Publ Rotterdam." A A Balkema. 1988 Results from 14 sites have been analysed. SPT, CPT, static and weight sounding tests, dynamic probing and pressuremeter tests were used in the field and backed up by laboratory examinations. Comparisons were made between results of the various penetration tests, and compatibility of results with existing relations in the literature was examined. Relations between angle of internal friction and settlement modulus and penetration resistance are presented graphically. 9032 ! I Determination of CBR and elastic modulus of soils using a portable pavement dynamic cone penetrometer Chua, K M Proc Ist International Symposium on Penetration Testing, ISOPT-I, Orlando,20-24 March 1988 VI, t>407-414. Publ Rotterdam: A A Balkema. 1988 The portable pavement dynamic cone penetrometer (PDCP) test involves driving a 60 deg cone on the end of a steel rod into the ground by means of a drop hammer. Depth of penetration is an indication of material properties. A one dimensional analysis of penetration of a rigid projectile into an ideally locking material was used to back calculate elastic modulus of the medium. Relations between CBR and elastic modulus were derived using the analytical solution. Variations in CBR-elastic modulus relations currently used can be explained using this analytical solution. 903212 Shear strength parameters of lime sludge based on statistical analysis of dynamic soundings using probes with vane tips Dembicki, E: Lewandowska. I; Loska, F Proc 1st International Symposium on Penetration Testing, ISOPT-I, Orlando,20-24 March 1988 VI. P423-428. Publ Rotterdam: A A Balkema. 1988 Lime sludge, a waste material from soda manufacture, is ponded before disposal. Tests on impounded sludge using two designs of probes recorded blow count per 100ram penetration and shear strength every metre. Large numbers of readings were taken and considerable scatter was evident. Statistical analysis of results to obtain parameters for stability analysis involved rejection of all anomalously high readings. Examination of results indicates the validity of the assumption of the Coulomb criterion for the material.

903213 Statistical evaluation of dynamic cone penetration test data for design of shallow foundations in cohesionless soils Kayalar, A S Proe 1st International Symposium on Penetration Testing, ISOPT-I, Orlando,20-24 March 1988 VI, P429-434. Publ Rotterdam: A A Balkema, 1988 Dynamic cone penetration testing may provide sufficient information for statistical and probability modelling of soil heterogeneity when an adequate database of soil properties is not available. Its application to a light industrial site is illustrated. 12 soundings to 10m depth were made. Reliability analysis was used to predict probability of failure, safety factors, and foundation dimensions.

903214 Rotary pressure sounding: 20 years of experience Rygg, N O; Andresen, A A Proc 1st International Symposium on Penetration Testing, ISOPT-I, Orlando,20-24 March 1988 VI, P453-457. Publ Rotterdam: A A Balkema, 1988 Rotary pressure sounding was developed in Norway to suit local conditions of soil, climate and terrain. A rotary bit is forced into the ground at a constant rate and thrust necessary to maintain penetration rate monitored. Equipment and methods are described, and examples presented of logs and their interpretation for sands, clays, and sensitive soils. The method is efficient, quick and economic. 'Total Sounding' systems capable of penetrating soil and boulder layers are under development.

903215 Cone penetrometer and in situ CBR testing of an active clay Smith, g B Proc Ist International Symposium on Penetration Testing, ISOPT-1, Orlando,20-24 March 1988 VI, P459-465. Publ Rotterdam: A A Balkema, 1988 Dynamic cone penetrometer (DCP) and CBR tests are often used to measure in situ properties of subgrades for pavements. Results from testing a heavy clay using both methods are compared. A significant linear correlation between the two sets of results is observed, with the relation being affected by moisture content and to a lesser degree by relative compaction. Moisture content influence should always be investigated when relating in situ CBR to DCP results.

903216 Development of and experiences from a light-weight, portable penetrometer able to combine dynamic and static cone tests Triggs, J F; Liang, R Y K Pear 1st International Symposium o n Penetration Testing, ISOPT-1, Orlando,20-24 March 1988 VI. P467-473. Publ Rotterdam: A A Balkema, 1988 A lightweight portable static-dynamic penetrometer has been designed for use at sites inaccessible by standard trucks or drill rigs. It uses an extra long friction sleeve as a self anchoring device. The ability of the apparatus to perform static tests and dynamic tests coupled with measurement of energy delivered to the rods allows useful correlations to be developed between output of the two methods. Results are presented from logging at 12 sites.

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