GB1446315A - Trench shoring machines - Google Patents

Abstract

1446315 Trench shoring machines; pile driving A N THOMPSON 9 May 1974 [9 Feb 1973] 5796/73 Headings E1E and E1H In a trench shoring machine comprising a series of longitudinally extending vertically spaced piles 30 arranged along each side of a framework, guide means are provided for guiding the piles for horizontal sliding movement longitudinally of the framework, drive means are provided for longitudinally advancing the piles with the framework held stationary, holding means are utilized to retain the piles in their advanced positions and means are provided for advancing the framework relative to the piles. The machine comprises a forward framework including walings 1, 2, 3, 4 and a rearward framework including walings 5, 6, 7, 8; the walings 1, 3 being interconnected by tie rods 9 and the walings 2, 4 joined by tie rods 11. The walings of the rearward framework are likewise joined by tie-rods 13, 15; the tie-rods being welded to the walings which are also interconnected as by struts 16, 18, 20. Each strut comprises a box-section guide 24 in which two bars 25, 26 are slidably positioned and adapted to be extended and retracted by a ram 27. The horizontally-extensible piles 30 are fitted between guides 29 on each side of the machine; the lowermost piles each has a rearward and downward taper 34 at their front ends, see Fig. 2 (not shown), and all other piles have a forwardly and outwardly tapered nose piece 33 secured thereto. One advancing ram 35 or 36 is provided for each pile whilst additional rams 44, 45 are provided to advance the framework 1-4 relative to the framework 5-8. Walings 1, 2, 5, 6, 7 and 8 are also each provided with a levelling foot 52 adjusted by a ram 53. A locking system 55, 56 is provided for locking the respective one of the walings 1, 2 to the piles at the appropriate side of the machine. The rearward framework carries a hopper 68 and the space below the hopper accommodates the pipe 28 to be laid. For modus operandi, details of locking system, hydraulic control and minor constructional details the Specification and remaining drawings (not shown), should be referred to.