几何尺寸与公差论坛------致力于产品几何量公差标准GD&T (GDT:ASME)|New GPS(ISO)研究/CAD设计/CAM加工/CMM测量 - 查看单个帖子

pier/pile pullout capacity
how would you estimate the pullout capacity of a grouted pier or pile in drilled rock?
thank you.
i'd expect to get that information from the soils report for the job.
rule of thumb is 1/4 of the axial capacity of the pile. the reasoning is, when the pile is load tested the ram used to produce the axial force is anchored onto four outer piles, therefore the upward reaction on each support pile is 1/4th the tested axial compressive force. however, i would also check with the geotech.
regards,
auce98
i think it depends on how far your pier is socketed into the rock. you'll be able to pull a little more on a pier 6 feet socketed into the rock instead of one socketed 6 inches in rock.
i've seen a report that recommended using 150 psi as the bond strength between the concrete and rock interface.
what type of rock are you dealing with?? is a solid or fractured? have you done any testing on it? 150psi as an allowable bond strength could be a little on the high side.

2009-09-15, 12:17 PM	#1
huangyhg 超级版主注册日期: 04-03 帖子: 18592 精华: 36 现金: 249466 标准币资产: 1080358888 标准币	pierpile pullout capacity pier/pile pullout capacity how would you estimate the pullout capacity of a grouted pier or pile in drilled rock? thank you. i'd expect to get that information from the soils report for the job. rule of thumb is 1/4 of the axial capacity of the pile. the reasoning is, when the pile is load tested the ram used to produce the axial force is anchored onto four outer piles, therefore the upward reaction on each support pile is 1/4th the tested axial compressive force. however, i would also check with the geotech. regards, auce98 i think it depends on how far your pier is socketed into the rock. you'll be able to pull a little more on a pier 6 feet socketed into the rock instead of one socketed 6 inches in rock. i've seen a report that recommended using 150 psi as the bond strength between the concrete and rock interface. what type of rock are you dealing with?? is a solid or fractured? have you done any testing on it? 150psi as an allowable bond strength could be a little on the high side. __________________ 借用达朗贝尔的名言：前进吧，你会得到信心! [url="http://www.dimcax.com"]几何尺寸与公差标准[/url]