Volume-IF - JantERmantER

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DCPL·K9A01
prevent overioading on jacks and consequent faHure resulting In twist
of the formwork.
! 'i.
Jacking rods should be of 25 mm diameter for 3 Tonne Jacks and 32
mm diameter for 6 Tonne Jacks.
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10. At least 30% spare jacks and Jacking rods should be kept ready
during the entire operation. His obligatory to maintain spare hydraulic
pump aIongwith a set of loose pipes In perfect working condition on
top of working dad(.
11. In sections where thickness Is 500 mm or more it Is prudent It, .;0 if:
for two nos. ofjacks for each sllpfonm yoke,
12. For effective utHity of this technique following areas need careful
attentions at the very conceptual stage :
a) DetaDed quality assurance programme.
b) Advance Planning and preparations.
c) Arrangement for on site supervision and adequate access
'facUities. .
13. Construction methods Including description and types of different
equipment proposed to be used. structural errangement and analysis
of the system, description and type of different materials. planned
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interruptions, description and frequency of various checks and tests
for Sllpfomn lechnlque as well as for material, method of preparing,
transporting and pouring of concrete, solution for probable defects
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~,,' 4llring slipping, sequence of operations during planned Interruptions
elc. should be prepared beforehand by executing agency and to be
apprOlled by Engineer before starting the actual ~rk.
14. Pladng and binding of reinforcement is also a very critical item and
needs special attention. From·pmctical·conslderations· not more than
1:.:,,'
two, or three layers of horizontal· Steel