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Title: Method and apparatus for constructing an underground barrier wall structure

Abstract

A method and apparatus for constructing a underground barrier wall structure using a jet grout injector subassembly comprising a pair of primary nozzles and a plurality of secondary nozzles, the secondary nozzles having a smaller diameter than the primary nozzles, for injecting grout in directions other than the primary direction, which creates a barrier wall panel having a substantially uniform wall thickess. This invention addresses the problem of the weak "bow-tie" shape that is formed during conventional jet injection when using only a pair of primary nozzles. The improvement is accomplished by using at least four secondary nozzles, of smaller diameter, located on both sides of the primary nozzles. These additional secondary nozzles spray grout or permeable reactive materials in other directions optimized to fill in the thin regions of the bow-tie shape. The result is a panel with increased strength and substantially uniform wall thickness.

Inventors:
 [1];  [2];  [1]
  1. (Albuquerque, NM)
  2. (W. Richland, WA)
Publication Date:
Research Org.:
SANDIA CORP
OSTI Identifier:
874286
Patent Number(s):
US 6357968
Assignee:
Sandia Corporation (Albuquerque, NM) SNL
DOE Contract Number:  
AC04-94AL85000
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
method; apparatus; constructing; underground; barrier; wall; structure; jet; grout; injector; subassembly; comprising; pair; primary; nozzles; plurality; secondary; diameter; injecting; directions; direction; creates; panel; substantially; uniform; thickess; addresses; weak; bow-tie; shape; formed; conventional; injection; improvement; accomplished; located; additional; spray; permeable; reactive; materials; optimized; fill; regions; result; increased; strength; thickness; substantially uniform; wall structure; /405/

Citation Formats

Dwyer, Brian P., Stewart, Willis E., and Dwyer, Stephen F. Method and apparatus for constructing an underground barrier wall structure. United States: N. p., 2002. Web.
Dwyer, Brian P., Stewart, Willis E., & Dwyer, Stephen F. Method and apparatus for constructing an underground barrier wall structure. United States.
Dwyer, Brian P., Stewart, Willis E., and Dwyer, Stephen F. Tue . "Method and apparatus for constructing an underground barrier wall structure". United States. https://www.osti.gov/servlets/purl/874286.
@article{osti_874286,
title = {Method and apparatus for constructing an underground barrier wall structure},
author = {Dwyer, Brian P. and Stewart, Willis E. and Dwyer, Stephen F.},
abstractNote = {A method and apparatus for constructing a underground barrier wall structure using a jet grout injector subassembly comprising a pair of primary nozzles and a plurality of secondary nozzles, the secondary nozzles having a smaller diameter than the primary nozzles, for injecting grout in directions other than the primary direction, which creates a barrier wall panel having a substantially uniform wall thickess. This invention addresses the problem of the weak "bow-tie" shape that is formed during conventional jet injection when using only a pair of primary nozzles. The improvement is accomplished by using at least four secondary nozzles, of smaller diameter, located on both sides of the primary nozzles. These additional secondary nozzles spray grout or permeable reactive materials in other directions optimized to fill in the thin regions of the bow-tie shape. The result is a panel with increased strength and substantially uniform wall thickness.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2002},
month = {1}
}

Patent:

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