Method and arrangement for controlling the position of an underg

Details Method and arrangement for controlling the position of an underg Method and arrangement for controlling the position of an underg

1973-11-28

1976-01-06

Shapiro, Jacob

Road structure, process, or apparatus

Apparatus

Rotating drum, roller or tire

61 11, 61 41, 61 50, 52 21, 52169, 404 5, E02D 2912, E02D 2700

Patent

active

039303721

ABSTRACT:
A method and arrangement for preventing an underground manhole assembly from moving upwards in response to a change in soil conditions beneath the assembly are disclosed herein. For example, in the event the soil directly beneath the assembly includes substantial moisture and in the event this moisture freezes, the latter expands against the base of the assembly and in many cases pushes the assembly in an upward direction. The method and arrangement disclosed herein eliminates this upward movement by the utilization of a pressurized fluid barrier which is maintained between the manhole assembly and the soil directly beneath the assembly.

REFERENCES:
patent: 261649 (1882-07-01), Apple
patent: 311299 (1885-01-01), Elliott
patent: 782383 (1905-02-01), Doty
patent: 1639495 (1927-08-01), Frame
patent: 3172377 (1965-03-01), Dewar
patent: 3345826 (1967-10-01), Hignite
patent: 3530677 (1970-09-01), Ede
patent: 3672103 (1972-06-01), Kost
patent: 3759280 (1973-09-01), Swanson

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