HYDRO31020

• Permit No: M1977342
• IBM Index Class Name: Hydrology
• Doc Date: 11/3/1986
• Doc Name: RESEARCH SOIL ANALYSIS
• Media Type: D
• Archive: No

The contractor i:, running about
°1 traim a d:n' into the tunnel,
pouring ~(ID ft. of the B-in. slab dur-
ing the day shift ti++'Ine and grace-
vard shifts clean the tunnel floor,
place gravel inhere necdetl, install
d aria lines ana shit, the roil +vhere
neccssarv to briuq it up to grade.
1'he preparatinu a~urk and place-
ment is carried ou: in aimilar sec-
tions. The trrnpoi,u ~~ hnux•I driving
track is torn out .•a.6 night and the
entire prep;u~.rlinn npcr;rtion cunv
plated more ar Icss in lhr clear. To
brid;c the Stlfl-ft. [;, p +cithrnrt tem-
pnr:uy track. Drano installed a 550-
ft. cnncevur which carries the c~n-
crete front train Gr :+oreed nt a speed
of 70U fpm. It hikes only' 5 olio. Gr
enrply a hco c.rr frail i. The agitator
cars rlo not dump directly auto the
Lmg conveyor but onto a (i.5-ft. pigg}•-
haek. clrv;din[; cnuvevor. The e'hnle
conveyor system is rail-nano dcd ^nd
operates nn a unit •.vith the pa+iug
Gain. It iv pulled f~nvard by moons
of hcu rviuchcs.
The pacing screed is aprippc•d +vith
vibratore and 5l rikc-off bar. Thr con
Crete eunu•s olf the :~uncecor ;uxl into
a 5-yd. hopper front ++'hicb it flu+vs
continuously oidn the prepared hnsr.
T+vo augers niounled dirccth' behind
move the enncn•4~ to the sides of the
lCi-ft.-+cide slab.
The ++iring for the train enutrul
system, which +rill ope; :tie the ore.
trains aulnmalic3lly, reyuiies four
con[inuons ernnycs in the surface of
the invert shit, plus block-outs fm'
ground harncs:: ryrrv 'Ott ft The
enun'rs are formed simple bt' means
of ,'G-in. by `.„-in. h;rrs uunurtc•d on
the sicced. Othrnvise the slab re-
gnires no surf;icr treatment.
The rail Iaging opcratiun mu+es
just ,boot as .vnoothh•. The rails are
being placed in cantinunns lrn,gths
and on bnh~l rubber pads 6r cushion
train movc•mrnt. Special lighhceight
templates +vere dcsiGneil fur rlrilline
bolt holes in the concrete for the
rail fasteners and other rigs for in-
sertine the bolts precisrh into place.
Plane for the hvo srh of tracks calf
for si.c anchor-bolts evcrv tin. (t.
Using the ?d-it.-tan,, template, a crew
of sis men can drill the 5-in. holes
at the rate nl 1(1011 ft. per shift.
]3efine placing the ]S-in. bolts,
S in. lone, the +carl:men are reyuircd
to clean out th~~ hole, and insert
grout Anoth~=r sp=aial template is
emplm'rd to iuserl the halts r:giid-
ly. Then the craw behind installs
the butyl rubber rail pads ^nd the
^nele. steel clips +ehich hol[l the rail
firmly in place. Lacing the r,iil is
accomplished by means of a custum-
designcd thu~uder. As this machine
nun'es do+cn the invert, the rail pass-
im; through it is lilted tram [he nut-
sic.c curb :md nmecd o+'er and doo'u
to its specified alignment The rig
handlos :dl four rails sinndtonrnusl+•
so that the rail is prccisrly pusi-
tinued on the roil pads fur both sets
of tracks i~r unc pass. A final crcx'
fastens it into place 6v Wrvpiing
eL i+cn the nuts un the bolts holding
th-~ anchor clips.
Tu obtain the invert finish grade
desired, ^ suvey party u'urk; :.
mi. ahead of the pacing train, direct-
ing the shimming of the rail where
nccrssary. Then uu the ernveroard
shift preceding cnncrrtr placenicnt,
another party re-checks the rail grade.
Althuneh actual pacing and rril-
hr}-in; rnnre ;tluug in an impressice
pruductiuu-liuc sh~lq the prepara-
CONCRETE MOYF.D oN The feeder bel+ and on}o The SSD-ft,.long conveyor for
delivery to the nevi secTion of concrete work. Drano modified ifs batch plant #o
produce a }oral of 100,000 cu.yd. for }he invert.
PAVING SCREED, equipped wiTh vibrators and strike-o8 bar, dis}ribufes con-
cnate across inner#, Three shifts work 24 hr. a day To compleTe }he 9':': mi. projecT.