IS 12200: Provision of Water-Stops at Transverse Contraction Joints in Masonry and Concrete Dams - Code of Practice

12 Pages·2001·1.1 MB·English

by  Bureau of Indian Standards

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IS 12200 (2001): Provision of Water-Stops at Transverse
Contraction Joints in Masonry and Concrete Dams - Code of
Practice [WRD 9: Dams and Spillways]
“!ान $ एक न’ भारत का +नम-ण”
Satyanarayan Gangaram Pitroda
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“!ान एक ऐसा खजाना > जो कभी च0राया नहB जा सकता हहहहै””ै”
Bhartṛhari—Nītiśatakam
“Knowledge is such a treasure which cannot be stolen”

RF1-@ai?aitk
w G1-Ff-tm+i
Indian Standard
PROVISION OF WATER-STOPS AT TRANSVERSE
CONTRACTION JOINTS IN MASONRY AND
CONCRETE DAMS — CODE OF PRACTICE
(First Revision)
ICS 23.040.45; 93.160

0 BIS 2001
BUREAU OF INDIAN STANDARDS
MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG
NEW DELHI 110002

December 2001 Price Group 3
Dams and Reservoirs Sectional Committee, WRD 9
FOREWORD
This Indian Standard (First Revision) was adopted by the Bureau of Indian Standards, after the draft finalized
by the Dams and Reservoirs Sectional Committee had been approved by the Water Resources Division Council.
The opening of the contraction joints provides passages through the dam which unless sealed, would permit the
leakage of water from the reservoir to the downstream face. To stop this leakage, water-stops should be installed
in the joints adjacent to the upstream face.
Advancement inthe specifications and the manufacture of material have resulted inthe acceptance of polyvinyl
chloride (PVC) as suitable material for joint seal. The material can be manufactured for a number of shapes
and sizes suiting to the specific requirement. In view of this, the matter regarding the replacement of copper
water-stop and asphalt water-stop by PVC water-stops has been under consideration for quite some time.
Experience in India and abroad has suggested that asphalt water-stops become defunct for want of adequate
heating arrangement and as a result, ithas been felt that the same should be replaced by PVC water-stops.
Copper water-stops can accommodate only a small lateral movement. Experience in the Pacific North West of
United States has shown that the sheet-type copper water-stop isvery vulnerable to failure especially in high
navigation lock. In Indian condition, project authorities have reported difficulties in properly brazing the
copper sheets and also its missing from the structure during construction. Accordingly, ithas been felt that the
copper water-stop should be replaced by PVC water-stops. This standard was first published in 1987. [n this
revision of the standard use of only PVC water-stops have been recommended and provision of other materials
have been deleted.
There is no 1S0 standard on the subject. This standard has been prepared based on the data received from
indigenous manufacturers’ and also taking into consideration the pactices prevalent in the field in India.
The composition of the Committee responsible for the formulation of this standard is given in Annex A.
For the purpose of deciding whether aparticular requirement of this standard is complied withl the final value,
observed or calculated, expressing the result of a test or analysis, shall be rounded off in accordance with
1S2: 1960 ‘Rules for rounding off numerical values (revised)’. The number of significant places retained in

the rounded off value should be the same as that of the specified value in this standard.
Is 12200:2001
Indian Standard
PROVISION OF WATER-STOPS AT TRANSVERSE
CONTRACTION JOINTS IN MASONRY AND
CONCRETE DAMS — CODE OF PRACTICE
/- . -.. ,
(First lYevMon)
1 SCOPE that when the material is compounded, it shall meet
the requirements given in IS 15058:2001.
This standard deals with the provision of PVC water-
stops across ungrouted transverse contraction joints 3.2 Shape and Dimensions
in masonry and concrete dams.
The typical shape and dimensions of PVC water-
2 REFERENCES stops are given in Fig. 1. However, the section of
PVCwater-stop willvary d~pending onhead and site
The Indian Standards given below contain provisions
requirements.
which through reference in this text, constitute
provisions ofthis standard. Atthetimeofpublication,
4 INSTALLATION OF WATER-STOPS
the editions indicated were valid. All standards are
4.1 In the caseofmasonry dams, the surface adjacent
subject to revision, and parties to agreements based
to the blockouts (shown by dotted lines in Fig. 2)
on this standard are encouraged to investigate the
possibility of applying the most recent editions of shall be irregular and thejoints inthe masonry shall
beraked outwhen mortar isgreen, with some stones
the standards.
protruding beyond dotted lines regularly in both
IS No. Title directions. No such blockouts shall be provided in
290:1961 Specification forcoal-tarblackpaint concrete dams where concreting on either side of the
456:2000 Code of practice for plain and rein- water-stops is done along with the concreting of the
forced concrete Vourth revision) rest ofthe block.
15058:2001 PVC water-stops at transverse con- 4.2 The blockout may be concreted in lifis not more
tractionjoints foruseinmasonry and
than 1.5m. Minimum grade ofconcrete to beused in
concrete dams— Specification
the blockout shall be M20 (see IS 456).

3 PVC (POLYVINYL CHLORI D E) WATER- 4.3 The blockout of one block maybe concreted first
STOPS and thejoint face given acoat ofcoahar black paint
conforming to IS290 and then only the blockout of
3.1 Material
the second block should beconcreted so asto have a
The water-stop should be fabricated from a plastic
clear contraction joint.
compound, the basic resin ofwhich shallbepolyvinyl
chloride. The compound shall contain additional 4.4 Typical details of water-stop arrangement (at
resins, plasticizers, inhibitors or other materials such contraction joints between two monoliths of a dam)
Alldimensionsinmillimetms.
FIG, 1TYPICALCROSS-SECTIONOFPVC WATER-STOP
1
1s 12200:2001
I
FOR MASOf#RYDA-MONLY.NOSUCH
BLOCKOUTISREQUIREDFOR I
~ CONCRETE DAM-
———— —. -——— -——-
t nl
CONCRETE
BLOCKOUT
(1850X6001 l
FLO& %
CONTRACTION I
JOINT I
VC WATER-STOP
U/S FACE OF I TOGALLERY
DAM FLOOR DRAIN
L
-— ..- —— -- ——-—
~—-
1
1850(MINIMU—M—) ——4
Vv vA
Alldimensionsinmillimetres.
FIG.2 SECTIONALPLANATCONTRACTIONJOINTS
near the top of a non-overflow section are shown in 4.5 PVC water-stops shall be provided around
Fig. 3, near the crest of agated overflow section in galleries/adits at the contraction joint between two
Fig. 4, near the bottom of the dam in Fig, 5 and monoliths of a dam as shown in Fig. 7. In case of
ungated overflow section in Fig. 6. masonry dam, the thickness of concrete cover may
be400 mm.
1
TOP OF DAM 7
7
250 X 250 STEEL PLATE /

I
OUTLINEOF T HE BLOCKOUTS1———-—.
FOR MASONRYDAM ~
,—.-— —- —-— ---- —
# I
150mln
t h i
I
11 I
I
I
1000min —- ~ P.V.CWATER-STOP
-L /
MWL
I
- I
— C#2I00TRAPDRAIN
i
I
it=
H--l
_600— .250
-’l
All dimensionsh millimetres
FIG.3 TYPICALWATER-STOPDETAILSNEARTHEToPOFNON-OVERFLOSWECTIONOFDAM

2
Is 12200:2001
rSEE DETAIL B
II
flSEE DETAIL A
i
!PVC ‘WATER-STOP (TO BE SUITABLY JOINED TO
THE GATE SILL BEAM)
E S!LL BEAM
DETAIL h’
] ~PVC WATER-STOP ~
AXIS OF
f%+’
“ I PIPE
U/S FACE OF
..
DETAIL B

Alldimensionsinmillimetres.

FIG.4 TYPICALWATER-STOPDETAILSNEARTHECRESTOFGATEDOVERFLOWSECTION
4.6 Water-stops rolls should be stored in a suitable 5 JOINTING
environment to avoid its damage due to adverse
PVC water-stops shall bejointed in straight reaches
weather conditions.
only by an experienced trained personnel using a
4.7 During installation, the exposed portion ofwater- suitable device in consultation with the engineer-in-
steps should be protected against adverse weather charge and the manufacturer.
conditions.

3
Is 12200:2001
--.+. 251A -300+300
>“ — +
I
I
: I
0 I
% I
w L
v 0200 STEEL PIPE
~
CONNECTED TO
~ FOUNDATION
3 LOPE 1:50 GALLERYDRAIN
----
/ ‘Ff200 TRAPDRAIN
*
PVC.
/ P.V.C. WATEft6TOP
WATER- I
STOP J
/ I
I
I
I
I
I
I
I
1507
/
4;0 ACCEPTABLE DAM
FOUNDATION ELEVATION
‘~)’ J= //f
h-lmo—----+i
All dimensionsinmillimetres.
FIG.5TYPICALWATER-STOPDETAILSNEARBOTTOMOFDAM

AXIS OF DAM PVC WATER-STOPS SHALL BE SUITABLY JOINED
TO THE ISMB 200 600 LONG(300 ON EACH SIDE
)\ OF CONTRACTIOd JOINT?
I
700X500X700 SLOCKOUT
1
cP12,4 Nos.
300 LONG J-BOLTS - ~
1=— +700
600 - “- -
H-t \
PVC WATER-STOP
All dimensionsinmillimetres.
FIG.6 WATER-STOPDETAILSFORUNGATEDOVERFLOWSECTION
. $<
Is 12200:2001
PVC WATER-STOP ~ ,
Soo
/
t
4 500 500
GALLERY/ADtT
,
,., .,.
Soo
Alldimensionsinmillimetres.
FIG.7 PVC WATER-STOAPROUNDGALL~RYIADAITTCONTRACTIONJOINT

., .,. ..>.

5