Page 499 - Trenchless Technology Piping Installation and Inspection

Index 449

Mini-HDD obstructions in pipe, 285t
additional path curvature, 221–222 Occupational Safety and Health Act
bore path layout/design, 208–216 (OSHAct), 379
buoyant weight and, 222 open hand shield, 11, 12f
calculation applications, 224–225 open shield pipe jacking, 11–12, 11f,
calculation simplifications for, 12f, 13f
219–223 open-cut installation
considerations, 203–205 bursting vs., 239–240, 240f
design example, 225–226 concrete pipes and, 145
drill-rod constraints, 205–207, 206f costs of, 3–4
ideal critical pressure and, 222, 223t loads, 4, 5f
manuals/guides for, 227 overview of, 3, 3f
operations, 203–205, 204f pipe-soil considerations in, 119–120
pipe collapse and, 222–223, 223t, related deaths, 380t
225 safety and, 379, 380t
pipe load calculations, 216–226 vs. trenchless construction
pipe/conduit constraints, 207 operations, 6t
pipes used in, 205 operating (service) loads, 198–199
planning, 205–207 OSHAct. See Occupational Safety and
pull force and, 220–221, 224, 224t Health Act
minimum allowable depths, MT, 320 ovality factors, CIPP, 70t
minimum depth at level, 211, 211f overcut allowance, 311
missing pipe sections, 285t HAB and, 334
modified PVC (PVC-M), 157 HDD and, 347
modified sliplining (MSL), 52f, 52t, MT and, 320
54t–55t, 57–58, 59f pipe ramming and, 339
moisture, 95 overdeflection, 139f
molecularly oriented PVC (PVC-O), ozonation, 102
156–157
monitoring system, PTMT, 327 packerhead process, 142
MSL. See modified sliplining PACP. See Pipeline Assessment
MT. See microtunneling Certification Program
panel lining (PL), 57, 59f
NASSCO. See National Association of partially deteriorated pipe, 50, 50t, 81
Sewer Services Companies PCCP. See prestressed concrete
National Association of Sewer Services cylinder pipe
Companies (NASSCO), 283 PCP. See polymer concrete pipe
new installation methods, 5, 8, 8f, PE. See polyethylene pipe
9–31, 9f performance limits
applications, 5, 7f flexible pipe, 137
capabilities/limitations of, 33, rigid pipe, 133
36–39 permits
cost estimation/bidding in, 43, 43t replacement design considerations,
CPJ, 9–12, 11f, 12f, 13f, 14f 251
HAB, 15–16, 17f types of, 374–375
HDD, 16, 18, 19t, 20, 20t, 21f pigging, 100t
HEBs, 15–31 pilot borehole phase, 188–189, 190f
MT, 20, 22–23, 22f, 24f pilot tubes, PTMT, 326, 327f
pipe-ramming method, 26–30, pilot-tube microtunneling (PTMT)
27f, 31f advantages/limitations of, 38
planning/safety considerations, alignment considerations, 328
39–42, 42f applications, 33t
PTMT, 23, 25–26, 25f construction considerations, 325–330
risks of, 40–41 equipment, 325–327, 326f, 327f
UT, 13–15, 15f geotechnical investigation, 328
non-circular pipes, 278, 279t inspection guide, 329f–330f
nonreinforced concrete pipe (CP), introduction to, 323
142 lubrication fluids and, 327, 328
non-worker entry pipe jacking, 11, 11f main characteristics of, 32t