![]() ¢ The Standard Specifications apply live loads as a point loadĪt the surface, increasing with depth to a square with sidesĮqual to 1.75 times the depth of cover. Have two major differences relative to the treatment of live Ible culverts often do not have sufficient internal stiffness toįor design, the AASHTO Standard and LRFD Specifications Is similar in width to that in rigid culverts, even though flex. To explain why live load distribution on flexible structures Not quantified through research, this mechanism is believed ![]() When flexible structures deform under live loads. ¢ The shear stiffness of soil spreads load over greater areas Solely to the structural stiffness of the slab (McGrath, et al., For example, live load in a boxĬulvert slab can be distributed over a width of about 4 ft due ¢ The stiffness of buried structures allows distribution of the Probably two key mechanisms are involved in distributing That the presence of a structure increases the effective spread Tal work (McGrath, et al., 2002, and other studies) has shown Range of the variables that must be considered. Tribution of live loads through fills when a structure isĮmbedded in the ground, because the problem remains tooĬomplex to complete closed form solutions for the wide Little definitive work has been completed regarding the dis. Sidering different configurations of surface loads. Marize several elastic solutions for this problem, mostly con. ![]() That is a linear function of depth are perhaps the most widely Ple assumptions such as spreading a surface load over an area The classical Boussinesq (1885) solution and sim. Because it is UNCORRECTED material, please consider the following text as a useful but insufficient proxy for the authoritative book pages.ĦMuch analytical and experimental work has been con-ĭucted to investigate the distribution of surface loads throughĮarth fills. Below is the uncorrected machine-read text of this chapter, intended to provide our own search engines and external engines with highly rich, chapter-representative searchable text of each book. ![]()
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