Document: NUREG-0800
Document ID: 072325a8-02ea-4d59-bb3f-06592c340804
Document Type: srp
Title: The Aluminum Association, Specification for Aluminum Structures
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070327.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.4
CFR Part: 
CFR Title: 

Content:
ures.) The report states that the value of 2 is based on the findings of Wood (EERL 73-05) and also on the fact that "at rest" pressures are about twice the active pressures. Since the factor 2 is for an infinitely long backfill, the Design Guide says that the appropriate elastic solution can be used for shorter lengths of backfills. Section 4.5 of the Design Guide is silent about the seismic lateral pressures due to submerged backfill, for which procedures are available in the literature (H. Matsuzawa et al., "Dynamic Soil and Water Pressures on Submerged Soils," ASCE Journal of Geotechnical Engineering, Vol. 111, No. 10, October 1985). CONCLUSION AND RECOMMENDATIONS On the basis of a review of the papers and reports cited above and also conversations with experienced engineers working in this area at universities, industry, and Government agencies, DRAFT Rev. 2 - April 1996 3.8.4-54 the staff believes that the calculation procedures suggested in Bechtel Design Guide C-2.44 (1980) are generally adequate for walls with shallow embedment. However, the Design Guide does not specifically address several factors, such as the effect of depth of embedment of exterior walls of nuclear power plant structures which have embedments ranging from 12.2 m (40 ft) to 25.9 m (85 ft), in the case of ABWR. The results of reviewing those papers and reports can be summarized as follows: (1) In determining the dynamic lateral soil pressures, it is necessary to distinguish three different types of structures, each of which may require a distinct analysis and evaluation. They are (a) gravity retaining walls and sheetpile walls, etc., with level or sloping backfill starting t the same elevation as the top of the retaining wall; (b) basement walls in buildings with the superstructure above the ground (e.g., embedded walls of nuclear power plant structures); and (c) completely buried underground structures (e.g., tunnels, underground tanks). (2) For rigid walls with shallow embedment, it