Recent content by ngangey

We are currently planning a tunnel for a small hyro project and one of our engrs. recommended to use rectangular shaped tunnel instead of an arc roof tunnel to save money for tha arc rib support..what would be the disadvantage if we use rectangular shaped when it comes to quality of the support..

what is more accurate the torvane shear or direct shear? hand penetrometer of UCS (ASTM D2166)

definitely we should devide qu by 3 to get the allowable bearing capacity. We conducted rotary coring on the area because ground level is already a bedrock (3 boreholes at 10m). The only basis now of calculation of the allowable bearing capacity is the UCS from the lab thats why i'm asking what...

we already conducted subsurface and the lowest UCS value is 12.5 MPa

What is the most conservative way in calculation of the allowable bearing capacity using the unconfined compresive strength of the rock....example: UCS = 12.5MPa

thanks fattdad now i understand

Is it advisable to use torvane shear and hand penetrometer test values in the foundation design and bearing capacity calculation

thanks fattdad. what is the difference then of "strike and dip" to "trench and plunge"

for more information this is the area and the pictures i had taken. including the geology....http://files.engineering.com/getfile.aspx?folder=231a6c69-293f-4512-a830-833144bcb231&file=the_site.pdf

i agree with you oldestguy since the climate is tropical and the type of soil is loose difinitely it will surely fail. they are using "geoslope" software to evaluate the stability based on the boreholes and soil parameters they gathered on site (cohesion, angle of internal friction, grading...

how do we interpret the results of the strike and dip in a stereonet program? what is the importance of measuring the strike and dip? thanks

BigH the pipeline is proposed to be exposed outside..pipeline slippers or its foundation is approx. 2m deep at 250 bearing capacity, pipeline dia is 2.0.

We have a pipeline project on a 60 degree slope mountain. We hired a specialist to evaluate the factor of safety which they provided equal to 2.31. Based on my site inspection the soil is dominantly composed of loose gravel. Thickness of soil is 3-6m from boreholes. Bedrock consiting of DIORITE...

thanks fattdad

thanks bigH..