GB2259534A - Shoring assembly - Google Patents

Abstract

Apparatus for shoring the side surfaces of an excavation comprising of a support frame (A, B, C, D) for positioning around the excavation, a plurality of first shore members (E), means for suspending the first shore members on the support frame (A, B, C, D), and a plurality of second shore members (F), each being mounted for slidable movement on a respective first shore member (E). The attachment of a footplate (G) to the second shore member (F) adds stability to the said shore. <IMAGE>

Description

ADJUSTABLE, PORTABLE SHORING SYSTEM The invention relates to an adjustable, portable shoring system Conventional type civil engineering shoring is a safety system that assists a person while carrying out various tasks within a trench. Tney are normally of mild steel or timber construction, of set lengths which are inserted adjacent to the trench sides, normally with adjustable or set crosspieces, to support the side walls from collapse. This style of shoring can be effective, but tends not to be easily portable and are of set sizes and usually needs heavy manual installation.

The New design consists of the following major components: a. 2 No. mild steel angle frames, to become the main structural frame.

b. 2 No. hinged mild steel angle frames, also to become part of the main structural frame.

c. A hollow box section of mild steel to form part of the sliding shore.

d. A narrower hollow box section of mild steel to form the second part of sliding shore.

e. A mild steel footplate f. Necessary bolts and fasteners to complete the construction g. A clip for attaching the sliding shore to the main structural frame.

h.2 No. mild steel straight frame,to become the main frame for parallel excavations,or rectangular/cess openings.

All the above components can vary in size and shape to cater for various lengths, widths and depths of excavatior N.B. ADDITIONAL COMPONENTS.

i. 2 No. mild steel (not hinged) to become part of main frame for parallel excavations.

The specific invention will now be described by way of reference to the accompanying drawings in which Fig 1 refers to the individual components required to form the sliding shoring system.

Fig 2 refers to the design when constructed Fig 3 shows side elevation of the shoring system in position Referring to drawing marked Fig 1, this drawing shows the systems adaptability for use within the Grave Shoring environment, conventional excavations and manhole/cess excavations.

Components A & B are formed 'L' shaped mild steel which are attached to hinged pieces C & D by means of bolts or similar type fasteners. Thus, giving us in this instance, a rigid frame for the shoring to attach to.

Component F is inserted into component E and initially held in place with a fastener through pre-drilled holes. Component G (the footplate) is attached by fasteners to the base of component F.

Once an initial depth is excavated, the sliding shore (E,F,G,) is clipped on to the rigid frame by placing the attachment clip on component 'E' on to the rigid frame.

Upon removing the retaining fastener within the pre-drilled holes in the sliding shore, component 'F' slides down to the base of the trench.

The shore is secured in the bottom of the trench by applying pressure to the footplate 'G'.

Referring to the drawing marked Fig 2, this illustrates the individual components fastened together ready for use.

Referring to the drawing marked Fig 3, this illustrates in perspective the shoring system in position within the trench.

a. The shoring system, because of its design and individual components ensures it is easily manoeuvrable and portable.

b. The specification and design of all components ensure safety margins in excess of requirements.

c. The shoring system allows relatively free and unobstructed access from any point of the trench.

d. The shoring systems versatility means that workmen do not have to leave the trench to insert of adjust the shores further.

e. The attachment clip allows sideways movement of individual shores to avoid obstruction in the base of the trench.

f. Each individual shore can be lifted independently to allow soil clearance from behind and below the shore.

g. The rigid steel framican be formed to suit any shape groundworks required.

h. The entire system can remain in position after the excavation has been completely refilled before being removed.

i. The shoring system can be adapted to cater for all types of ground conditions be it open or close board shoring j. Offers protection to persons workingwithin the trench from spoil or materials falling into the excavation from above.

Claims (3)

'CLAIMS'

1. Apparatus for shoring the side surfaces of an excavation comprising a support frame for positioning around the excavation, a plurality of first shore members, means for suspending the first shore members on the support frame, and a plurality of second shore members, each being mounted for slidable movement on a respective first shore member.

2. Apparatus as claimed in claim 1 wherein a footplate is attached to each second shore member.

3. Apparatus for shoring the side surfaces of an excavation as claimed in claim 1 ard substantially as hereinbefore described with reference to, and as illustrated in the accompanying drawings.