The Invisible Infrastructure

by Steven R. Kramer, P.E., (M.ASCE), Principal; Jason Consulting Int. Inc., Washington, DC,

Serial Information: Civil Engineering—ASCE, 1998, Vol. 68, Issue 10, Pg. 48-51

Document Type: Feature article


Most developed countries have 50- to 100-year-old underground utility systems that carry far greater loads than their designs. They're difficult to repair or replace, yet they're under increasing strain. Trenchless technologies—once considered an innovation—are now becoming more common as designers seek to keep older infrastructure running smoothly. There are two common trenchless methods, guided directional drilling and microtunneling/pipe jacking. Each has its own best uses and unique set of benefits.

Subject Headings: Infrastructure | Subsurface utilities | Trenchless technology | Load factors | Strain | Innovation | Drilling | Jacking

Services: Buy this book/Buy this article


Return to search