By
Mr. S.L. Ghorpade
Under the guidance of Prof. A.B. Shendge
Dattakala Group of Institutions Faculty of Engineering, Swami – Chincholi (Bhigwan).
Abstract- The construction of tunnel is important for different purposes. They can be constructed for railways, roadways, pedestrian footways and can be built in hard rock, soft ground, river bed and are also used to convey Hydroelectric power, water stream, or as a sewer. The construction of Diversion Tunnel, Pressure Shaft, and Tailrace Tunnel to convey water is considered in this project. To identify Scheduling of different activities by various methods Network Diagram, C.P.M., P.E.R.T. and their cycle time is calculated. Scheduling for different activity is carried out with the help of Network Diagram & Primavera Software will be carried out in a project stage II. Study of Estimation for a Diversion Tunnel, Pressure Shaft, and Tailrace Tunnel by both methods. Excavation in heading and benching, Rock bolt support work, lining work is considered for cycle time and cost estimation calculation in Diversion Tunnel, Pressure Shaft, and Tailrace Tunnel. Estimation is also carried out by two methods. The comparison of two methods adopted for excavation work and estimation will be carried out in a project stage II.
Keywords- Scheduling, C.P.M., P.E.R.T., Gantt chart, Network Diagram, Estimation, Heading, Benching, Cycle time, Lining, Rock Bolts, Diversion Tunnel, Pressure Shaft, Tailrace Tunnel.
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Hello. I want to find out these from you. What is quasi-displacement, and quasi-displacement control technique? Also, when we say finite element modelling of reinforced concrete beam, what does it mean?
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1.How prevant shrinkage cracks in roof ?
2. How to prevant cracks in lower portion of beams?
3. How to prevant cracks at the portion between roof and brickworks?
4. How to prevant efflorecence of brickwork?
The tonnage from two vertical shafts each to be sunk to a depth of 2 000 metres is to be dumped
on a square piece of ground, measuring 160 m x 160 m, in the form of a cone with a circular base.
The one shaft is rectangular with dimensions of 11 m x 3 m and the other a 7 m diameter circular
shaft. Both the ground and the top of the dump are to be accepted as level. If the ratio of “in-situ”
to broken rock is 12: 20 and the angle of repose for rock is 380, calculate:
i. The height of the dump,
ii. The top are of the dump,
iii. Determine the height of the dump if 20 000 tons are sold to the crushers
iv. (“in- situ” density 2, 73 tons/m3).
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What is the water cement(w/c) ratio for concrete??
check IS CODE 456
Normally 0.45 w/c ration get used for concreting.
But under-water (IS 456-2000)
14.2.2 Under-water concrete should have a slump
recommended in 7.1. The water-cement ratio shall not
exceed 0.6 and may need to be smaller, depending on
the grade of concrete or the type of chemical attack.
For aggregates of 40 mm maximum particle size, the
cement content shall be at least 350 kg/m3 of concrete.
hey i got the question, what is the methodolgy of Healty House in civil engineering ????
i am a civil engineer by professional an have be on the job for more than 10yrs but wish to specialize in structural design any good s.designer can help me. Ever ready to learn and work with the person.i am from Ghana Knust currently working in Rwanda-Kigali as project manager.
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BestRegard.
Md.monazir
Looking at driven pile with a follower. What can be the effect of a cone shaped follower on the transfered energy?
if the flakiness and elongation index of the aggregates is above 25% what is the effect of this on concrete and what are the values ?
Hi i m the student of civil engineering at iit delhi .Civil engineering is the mother of all enggineering department.civil engineering switch of all department…
Well the water cement ratio depends on the grade of concrete you want to design? The mix design is based on the target strenght in the laboratory and correspondingly the value of w/c ration can be obtained from the curves given in the IS code 10262 2009. I advise you to read this code. However as a thumb rule M20 grade is 1:1.5:3 and w/c ratio of 0.45 may work
There are many ways to reduce shrinkage cracks in roof
1. Reduce water content in concrete by restricting the water just to obtain desire workability. you may use water reducing admixtures
2. Concrete should be properly cured either by spraying curing compounds and keeping concrete wet or by covering the surface
3. cement rich or highly wet mixes should not be used
4. excessive working at the top surfce should be avoided as this will bring cement paste on the top and coarse aggregates will be depressed.
Mr. Pawan pandey is asking for w/c ratio in concrete? I understand if some body is posting this question he may be informed about the how this is arrived at in mix design!!
is microsoft excel essential for a civil engineer?
Sir i got 75 percentage in diploma in civil engg. Will i get this much percentage in engineering.
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