In t= kdp formula , p is not directly mpa or 0.7 for all bolts. P is desired Tensile load which is 75% of yield load. For a bolt of fy 230 kn. P is 230 x 0.75 = 172.5 Kn or 17250 kgs.
What a beautiful approach you made to clear many doubts of Civil Engineering members in learning stage to expert stages who certainly benefited a lot and can transplant your thought to others understand. Beautiful skill you are having to give back our Foreman / Supervisor/Engineer/Geotechnical Engineer. Wishing your Good Health Akhilanath Mishra
Moreover k which is coefficient of friction is also variable. For normal dry steel bolts it is 0.2, for zin coated it is 0.22. For cadmium it is different and so on.
Good Evening Sir, Sir whats about SDR 32mm dia and 4m long cement grouted rock. I have few question regarding this- 1- after how many days we torque this Cement grouted SDR 2- what will be the torque value in NM. Kindly provide your valuable suggestion and guidance. Thanks in advance
No minimum displacement criteria. Max displacement(elongation) in pull out test should be less than 0.25 mm per KN of tested load . If tested for 160 KN displacement is 160x0.25 = 40mm
@@sarthakaswal7023 it is correct torque is t= kdp T= kg-m or N-m on lhs Kg metre K= coefficient value or rhs D = nominal diameter of bolt in metre P= Tensile load in kilogram Hence lhs = rhs
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@Major Trace thanks so much for your reply. I found the site on google and I'm waiting for the hacking stuff atm. Takes a while so I will get back to you later with my results.
In t= kdp formula , p is not directly mpa or 0.7 for all bolts. P is desired Tensile load which is 75% of yield load. For a bolt of fy 230 kn. P is 230 x 0.75 = 172.5 Kn or 17250 kgs.
What a beautiful approach you made to clear many doubts of Civil Engineering members in learning stage to expert stages who certainly benefited a lot and can transplant your thought to others understand.
Beautiful skill you are having to give back our Foreman / Supervisor/Engineer/Geotechnical Engineer.
Wishing your Good Health
Akhilanath Mishra
Very very thanks
Very useful and easy understandable talk sir
Ok
Sir u re most Intalgent officer. I like u sir
Thanks
thank you guru g
Thank you sir
Nice to see you sir..
Superb vedio sir 🙏
Thanks
Moreover k which is coefficient of friction is also variable. For normal dry steel bolts it is 0.2, for zin coated it is 0.22. For cadmium it is different and so on.
no less important is the type and pitch of the thread of the roof bolts
Thanks sir
Sir anchor ka pull out test ka bhi video bana dijiye
Ok
Sir, if 25mm dia & 4.0 m long rockbolt then torque value???
Sir make video on steel Arches or other supporting system use in the tunnle after Rockbolts installation
Ok
@@ErKaushalKishorSingh Hello sir Namaste Fresher civil engineer ko tunnel m kya work karna hota h
@@ErKaushalKishorSingh Sir ek Quality site Engineer ka tunnel project m kya kya work hota h please us par bhi video laao
Good Evening Sir,
Sir whats about SDR 32mm dia and 4m long cement grouted rock. I have few question regarding this-
1- after how many days we torque this Cement grouted SDR
2- what will be the torque value in NM.
Kindly provide your valuable suggestion and guidance.
Thanks in advance
Sir mera NATM se tunnel work chl rha h....or interview kya2 Questions honge sir
Carefully see the all video which will be helpful for your Interview.
Sir pls make video on pullout test of rock bolt. How much load shall be applied for testing.?
Will be replyed in next video
80% of ultimate load should be applied for testing.
Good job
Thanks
Sir Agar pull out test machine MPa mai hoo usko kse nikalegay
I shall provide you a video within 15 days.
Thanks
Good morning sir, please send me Rock anchor stressing calculation
Rockbolt me minimum and maximum displacment
The distance between two rock bolts should not be more than 1.5 me.
No minimum displacement criteria. Max displacement(elongation) in pull out test should be less than 0.25 mm per KN of tested load . If tested for 160 KN displacement is 160x0.25 = 40mm
Sir good, in question ka answer kya hoga. Jaruri hai.
Sorry , I did not know.
Sir if K is constant, P is tension in Mpa and D is diameter then how come torque comes out in Kg/m???
It is kgf-m and not kg per metre
@@meenuarif4448 Actually, i wrote wrong. I wanted to write kg-m. Even then L.H.S is not equal to R.H.S
@@sarthakaswal7023 it is correct torque is t= kdp
T= kg-m or N-m on lhs Kg metre
K= coefficient value or rhs
D = nominal diameter of bolt in metre
P= Tensile load in kilogram
Hence lhs = rhs
@@meenuarif4448 Sir said in the video that P is in Mpa
@@sarthakaswal7023 it is wrong
Thank you sir 🙏
You probably dont care but does anyone know of a tool to log back into an Instagram account?
I was dumb forgot my login password. I would appreciate any help you can offer me!
@Kace Cannon Instablaster =)
@Major Trace thanks so much for your reply. I found the site on google and I'm waiting for the hacking stuff atm.
Takes a while so I will get back to you later with my results.
@Major Trace It did the trick and I actually got access to my account again. Im so happy:D
Thanks so much, you saved my account!
@Kace Cannon Happy to help :)