What are the different types of canal lining?
Table of Contents
Types of Canal Linings
- Earthen Type lining. Ad. Earthen Type lings are again classified into two types and they are as follows: Compacted Earth Lining. Soil Cement Lining. Compacted Earth Lining.
- Hard Surface Canal Linings. It is sub divided into 4 types and they are. Cement Concrete Lining. Brick Lining. Plastic Lining.
Is standards for a canal design canal lining?
The Bureau of Indian Standard code IS: 10430-1982 “Criteria for design of lined canals and guidelines for selection of type of lining” (Reaffirmed in 1991) may generally be used, in addition to special codes like IS: 9451-1985 “Guidelines for lining of canals in expansive soils (first revision)” (Reaffirmed in 1991).
What is the most commonly used shape for a lined canal?
The purposed shape of a lined canal as per Indian Standards Institute (National Bureau of Standards) is Trapezoidal.
What is the thickness of canal lining?
It has been shown through studies done in the U.S., that a layer of bentonite 2 to 5 cm thick, underneath a layer of earth 15 to 30 cm thick, makes for an adequate lining system. Typically, porous soils are removed before compacted clay is applied to the bed and sides of a canal.
Which cement is used for canal lining?
Sulfate resisting cement is used in construction exposed to severe sulfate action by water and soil in places like canals linings, culverts, retaining walls, siphons, etc.
What grade of concrete is canal lining?
grade M 15
The concrete used for lining should be design mix concrete of grade M 15 and should confirm to requirement of IS 456:2000 The concrete should be mixed by mechanicalmeans, hand mixing is not allowed.
What are various material used in lining?
Types
| Fiber Type | |
|---|---|
| Natural fibers | Silk lining |
| Cotton lining | |
| Wool lining | |
| Artificial fibers | Viscose and rayon lining |
What are the disadvantages of canal lining?
Following are the disadvantages of canal lining:
- It requires a very heavy initial expenditure.
- When lining gets old, cracks usually develop. It is very hard to check leakage through cracks.
- The portion of the lining joints always creates problems.
- The outlet shifting process is very difficult.
Which is the major danger for canal lining?
stop the floods
So, therefore lining of canal helps to keep a check or stop the floods, which is a major danger.
What is soil cement lining?
When the lining is done by using a mixture of soil and cement is known as soil-cement lining. The quantity of the used cement in the soil-cement lining is 5 to 10 % of the weight of dry soil.
Is code a siphon?
IS 7784-2-5: Code of Practice for Design of Cross Drainage Works, Part 2: Specific Requirements, Section 5: Syphon Aqueducts.
What is the design of lined canals?
Read this article to learn about the design of lined canals. The lined canals are not designed making use of Lacey or Kennedy Theory because the section is rigid. Generally Manning’s equation is used in design. To carry a certain discharge number of channel sections may be designed with different bed widths and side slopes.
What are the advantages of lining a canal?
The lining prevents dripping, in the end more water can be irrigated with the same amount of water and valuable water is saved. Seepage is the main cause of waterlogging if the canal is lined the seepage is reduced thus helps in protection from waterlogging.
When can a canal be designed with a flat bottom?
When r exceeds 55 m or when discharge is more than 85 m 3 /sec, the canal should be designed with a flat bottom with fillets at corners. The Indian Standard 4745 in fact does not suggest lined canal with circular bottom.
What is the average value of N in a lined canal?
In general practice for lined canal average value of N may be taken as 0.018. For different types of linings the value of W varies. The values given for straight channels in Indian Standard 4745 are given in Table 10.3.