Tunnel Engineer
2020-01-05 - Presently working
i) Execution of a) open cut- Approach road alignment and road making, slope cutting and
open excavation, catch drain work(excavation + formwork + RCC), slope protection work(
welded wiremesh fixing + wet shotcrete by sealing and 1st/2nd layer+ SD(32mm dia)/SN(2
5mm dia) rock-bolting on 100 downward angle + 63mm diameter perforated HDPE PN6 d
rainage pipe wrapped with geotextile installation on 100 upward angle + berm drainage),
false portal construction by rib girder erection and spraying wet shotcrete, turfing etc. b)
inside the main tunnel- Piperoof marking and piperoofing (114.3mm diameter, 12m long
on 5
0 angle or 15m long on 3.30 angle) by double-armed Tamrock and piperoof grouting b
y MAI pump, SDA/SN forepole marking and forepoling (32mm diameter, 6m long on 150 a
ngle) by double-armed Tamrock and forepole grouting by MAI pump, fiber glass bolt mar
king and fiber glass bolting by double-armed Tamrock for face-bolt and fiber glass bolt gr
outing by MAI pump, profile marking and face excavation by hydraulic breaker, undercut
removal manually according to survey profile, ISMB 150 steel rib/3-legged lattice girder e
rection by Loadall or double-armed Tamrock or Excavator, welded wiremesh fixing, wet s
hotcrete by Meyco or CIFA or Putzmeister shotcrete machine, SN(25 mm dia)/SD-bolt(32
mm dia) marking and bolting (perpendicularly with periphery of face) by double-armed T
amrock or Boomer and SDA grouting by MAI pump, contact grouting by MAI pump, 63m
m diameter perforated HDPE PN6 drainage pipe installation wrapped with geotextile, sa
wtooth lattice girder erection and wet shotcrete, TR niche and E&M niche excavation an
d its all primary supporting works, smoothing wet shotcrete of whole tunnel, final lining w
orks of main tunnel (reinforcement work of invert, RCC-M30 invert + 150mm/200mm dia
meter 3 sided slotted HDPE PN6 drainage pipe wrapped with geotextile installation at bo
th sides and no-fine concreting + waterproofing by seam test + gantry shutter alignment
and formwork and stop-end fixing + SFRC-M35 overt, reinforcement work of overt and R
CC-M30 overt etc.), final lining works of E&M (reinforcement work of invert, RCC-M35 in
vert + no-fine concreting on invert bed + waterproofing by seam test + gantry shutter{col
lar & face wall} alignment and it’s formwork and stop-end fixing + SFRC-M35 overt, reinfo
rcement work of overt and RCC-M30 overt etc.) and TR (reinforcement work of invert, RC
C-M35 invert + no-fine concreting on invert bed + waterproofing by seam test + gantry sh
utter{collar & face wall} alignment and its formwork and stop-end fixing + SFRC-M35 ove
rt, reinforcement work of overt and RCC-M30 overt etc.), cable trench work (reinforceme
nt of raft, inner walls, partition walls, outer walls, formwork and stop-end fixing, concreti
ng) BLT (ballast less track) works i.e. surface cleaning of invert PCC-M15, marking of shea
r connectors, shear connectors fixing for BLT sub-base layer, BLT sub-base layer PCC-M20
pouring, green cutting, cleaning of BLT sub-base layer, TCL level marking and point punch
ing, rail fixing by GSF by spacing of 3.6m, base plates and its components fixing by spacin
g of 600mm, BLT slab reinforcement and its formwork, all parameters checking (i.e. base
plate spacing, base plate cross checking by right angle with help of line thread and plum b
ob, center line of rail track checking by center line gage with the help of plum bob, cant c
hecking by auto level survey instrument as per provided co-ordinate, cant checking by tra
ck laying levelling instrument, versine checking), packing at both side of formwork, track s
lab concrete (M35) pouring by concrete pump, derailment guard formwork and its concr
ete (M35) pouring, de-shuttering of truck slab and derailment guard, backfill concrete (M
25) between track slab wall and cable trench inner wall etc. c) cut & cover work (34m, 12
3m)- raft excavation and levelling, EV2 test, both side marking for raft PCC, PCC pouring,
