geotechnical engineering
geotechnical engineering
(OP)
Pls. advise how to decide on the depth of rock socketing. Is there any guidlines or data at site where we can decied the socketing depth.
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RE: geotechnical engineering
RE: geotechnical engineering
So I need to know, is there any guide lines that are related to the penetration of the rock to the time. We are using chisels to socketing peurpose.
Bimal
RE: geotechnical engineering
RE: geotechnical engineering
A few (about 6, as I recall) of small (18" diameter, or so) test drilled piers were installed with styrofoam placed at the bottom of drilled hole. The depth of the rock socket was carefully determined. A pair of reaction drilled piers were also installed adjacent to each test unit. Reinforced concrete was placed with small tubing embedded in the concrete all the way down to the styrofoam. After the conrete cured, chemicals were injected into the tubing to "dissolve" the styrofoam (groundwater pollution laws may not allow that these days). Oversized steel casing prevent contact with the overburden - all support came from rock socket skin friction.
Each test drill pier was loaded until it failed (slipped down). With the contact area known and the failure load known, the coefficent of friction was determined. We used this value, with an added safety factor, for the design of 2000 or so, 4 ft. diameter drilled piers for the project.
www.SlideRuleEra.net
RE: geotechnical engineering
www.loadtest.com