The document discusses slip form construction as an advanced technique for creating continuous, joint-free concrete structures, highlighting its advantages over traditional methods. It outlines the mechanization of the process, which requires fewer skilled laborers, improves construction speed and safety, and reduces costs associated with scaffolding and formwork. It also considers the impact on employment, suggesting that while mechanization may reduce demand for carpenters, it is necessary for handling complex and demanding construction projects efficiently.

1. ASSIGNMENT
ON
TOPIC:- SLIP FORM CONSTRUCTION
Advance ConstructionTechnology
(MCT 6206)
• Submitted by :- Ankaj Kumar
• Roll no: - 202304
• M.E (CTM) Regular
• National Institutes of TechnicalTeachers
Training and Research , Chandigarh
• Submitted to :- Dr Amit Goyal

2. Ques: 1.Why this system is called SLIPFORMING?
Answer:- Slipforming enables continuous, non-interrupted,cast-in-place “flawless” (i.e. no joints) concrete structures
which have superior performance characteristics to piecewise construction using discrete form elements.Slipform
construction technique is an alternative for conventional formwork system which helps in continuous vertical and
horizontal construction.The slipform helps to conduct continuous pouring of the concrete to the moving formwork.
The process stops only when the required length of casting is completed.In this construction, lifting jacks which are
on the ground or working platform are used to lift up the form and worker’s scaffolding attached with jacking rods.
These jacking are embedded un the hardened concrete.The hardened concreteprevents the buckling of jacking rods
that’s why it is called slipforming.

4. Ques: 3.Slipforming is mechanized way of constructing very high
structures & involves Mechanical/Civil/Hydraulic Engineers.Explain?
Answer:- following are the reasons make mechanized way of construction very
high structures :-
1) Simple and versatile.
2)Takes you to any height.
3) Copes with every wall structure.

5. 4)The system can be erected using unskilled labors.
5)This helps in quick and easy assembling and dismantling.
6) It has a dominant influence on the appearance and accuracy of finished
concrete.
7)There is minimum consumption of timber and steel in the formwork.
8) It gives a monolithic structure without vertical and horizontal construction
joints.
9) Economical
10) Improve construction quality

6. 11) Increase safety of construction conditions
12) Enhance speed of construction
13) Feasibility
14) Non-stop Method of Construction
15) Increase rate of construction
16) Increase the productivity
17) Provide more working space
18) Creates safe work environment for the workers
19) Employs less accessory equipment
20) Increase flexibility in construction
21) Reduced Labor costs
22) Scaffolding and temporary works in construction is reduced
23) Uniform wall sections and layouts are obtained

7. Ques: 4.How the tapering structures are made by Slipforming? How do we
reduce diameter,wall thickness & do Lifting Simultaneously?
Answer:-The tapering structure are made by slipforming are following:-
i. Position the vertical and horizontal reinforcement with the correct cover.
ii. Casting the starter.(Provide pocket or pipe sleeve in yoke locations to
accommodate tapered sleeves )
iii. Check starter for the correctness in inclination level and diameter.Chip
and finish the same, if required.
iv. Erect central tower using L&T HDT system and fix planks on the top after
aligning the top construction accurately.
v. Fix the centre frames with the help of scaffold pipes, if required.
vi. Pre-assemble the trusses and spiders after marking the location of inside
yoke leg, assemble with yoke legs, yoke beams, adjusting screws as per
initial setting diagram, erect them and provide support.

8. vii. Check the level of truss.
vii. Check the level of truss.
viii. Mark the position of inside and outside yokes in the starter starting from
the tower location.
ix.Assemble the panels along with form supports with pre-assembled
condition.
x. Fix top and bottom waler. Fix external supports both horizontal and
inclined to align the shutter.

9. xi. Fix inside and outside consoles and upper outside console and fix planks.
xii. Fix the yoke beams at top & bottom.
xiii. Check the level of yoke beams with spirit levels.
xiv. Fix the top platform pipes with guard railings.
xv. Fix the jacks & turnbuckle jacks and finish the hydraulic connections.
xvi.Test for leakage in the line and jacks and replace,if required.
xvii. Fix water level tubes & check the platform level.Adjust if required.
xviii. Check the final adjustment as per the initial setting diagram.
xix. Fix the handrails.
xx. Fix the tapered sleeves & jack rods.
xxi. Energise the slipform before filling the form and removing temporary
supports.
xxii. Start the concreting after completion of all activities and checking the
availability of all materials as given in the planning for slipform.
xxiii. Fix the inside and outside hanging scaffold and do the decking.
xxiv.Tie the safety net.

10. For reduce diameter,wall thickness & do Lifting Simultaneously some
Adjustments are made for inclination of wall, radius and wall thickness if
structure under construction has tapered cross section. For inclination of wall,
the yoke legs are positioned in such a way that thickness of wall at top and
bottom varies. Generally,by providing about 2 mm less to shutter arrangement
at top and 2 mm more at bottom, shutter inclination differs by 4 mm per meter
vertical height of wall for both inside and outside shutter.The additional taper
of yokes prevent drag of form panel with concrete.The adjustment for varying
radius is done by means of radius screws.Two wall thickness screws,one on
inside yoke leg and one on outside yoke leg are provided for changing thickness
of wall.

11. There are three platforms supported on yokes.The top platform also known as
“Top Deck” is used for receiving and distributing concrete,other materials and
operating men, second level platform is provided inside and outside at the level
of form panels to facilitate vibration of concrete,tying of reinforcement,fixing
of inserts and pockets, etc. and third platform is provided below form panel for
masons to finish concrete exposed from slip-form shutter,to expose inserts,
dowels, etc. and for curing of concrete.

12. Ques: 5.Manpower saving in Slipforming (no carpenters required),Good
for the Country/Employment?
Answer:-With innovative concepts that help in speedy construction work,
there are substantial savings in cost in terms of wages and interest.
This technique assures the quality control and Homogeneity of structure.
There is no direct cost saving just because slip forming has been used.The slip-
form technique has a wide scope of improvement.But it can be adapted for tall
structures.
Regarding saving in slipforming (no carpenters is requires),is not good for
country/employment in my point of views because it increase the
unemployment for our craftsman.But of rapidly construction slipforming is
important.

13. Ques: 6.Will mechanization in form work render our carpenters idle?
Answer:-Yes,The craftsman with the superior skill had disappeared.Such skill is
no longer necessary.The only type of skill that is needed now is to run the
machines. It creates unemployment because one machine can take the place of several
men.
Mechanization is the process of shifting from working largely or exclusively by hand
to do that work using machines.The construction projects are becoming more
demanding and complicated in construction and delay of projects would arise if
conventional construction method is used.
Delays in construction are costly and have prompted developers to embrace
mechanization. Construction machineries are used in order to achieve larger output,
cost-effective,execution of work that is not feasible by manual efforts, reduce the
amount of heavy manual work which would cause fatigue, maintaining large output,
and finalize projects on time.

14. Ques: 7.Scaffolding is major capital investment in Construction Projects,
no scaffolding is required for Slipform Projects, and how Slipforming is
cost effective? Please discuss.
Answer:-The biggest benefit we provide is the rapid installation time.With a
slide speed of 2.5-3.5 metres per day, you can be sure of a shorter construction
time and, as a result,reduced costs.
A sliding casting process is continuous, so there will be no casting joins.This is
a great benefit, particularly in the case of watertight constructions.
The system has been developed over 40 years and can therefore handle complex
constructions with the highest levels of confidence.cts

15. Such constructions may involve openings of various sizes, embedded items,
reinforcements,jumps, conical shapes, continuous reduction of wall thickness,
and so on.
Sliding formwork is a safe construction method that does not require major crane
lifts and the associated risks. It also means that the system is largely unaffected
by the weather,and sliding casting can continue even in high winds.
Mechanization is based on rented construction equipment is cost effective.
Construction equipment when rented can be exactly to match the requirement.For
rented equipment,time to make the equipment ready for operation is important.