ACI MANUAL OF CONCRETE PRACTICE 1991. PART 5. MASONRY, PRECAST CONCRETE, SPECIAL PROCESSES. STATE-OF-THE-ART REPORT ON SEALING JOINTS IN TUNNELS
The present state of the art in the construction of tunnels involves the installation of a concrete lining to minimize cracks and water infiltration. The shape, location, and type of joints, as well as the material used as joint sealant affect the prevention of water infiltration. There are two methods for lining tunnels with concrete. The cast-in-place method is well developed. It employs longitudinal and transverse joints to facilitate construction. Longitudinal joints are sealed by bonding concrete to concrete. Transverse joints are sealed with rubber or polyvinylchloride waterstops. The precast concrete method use precast segments. Here the design of joints varies with ech project in accordance with whether construction is in soil or rock and with the presence of groundwater. In precast linings the lap, knuckle, flush, tongue and groove, and convex to convex joints have been used. These are bolted or nonbolted. The sealants commonly include bituminous mastics, elastomeric materials, wood strips, gasket-caulking, epoxy materials, or a combination of these materials. The joint sealing systems applied in various projects are reviewed.
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Detroit, MI United States 48219
- Publication Date: 1991
- Features: Figures; Tables;
- Pagination: 13 p.
- ACI Manual of Concrete Practice
- Publisher: American Concrete Institute (ACI)
- ISSN: 0065-7875
- TRT Terms: Concrete construction; Gaskets; Joint sealers; Joint sealing; Plastics; Polymers; Precast concrete; Resins; Tunnels
- Subject Areas: Bridges and other structures; Construction; Highways;
- Accession Number: 00608054
- Record Type: Publication
- Report/Paper Numbers: ACI 504.1R-82
- Files: TRIS
- Created Date: May 31 1991 12:00AM