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Application of concrete lining to e.g. sewer - uses pneumatic lance to jet concrete between bore and demountable mould and compact it
Application of concrete lining to e.g. sewer - uses pneumatic lance to jet concrete between bore and demountable mould and compact it
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机译:将混凝土衬砌应用于例如下水道-使用气动喷枪在孔和可拆卸模具之间喷射混凝土并将其压实
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摘要
A pneumatic gear projects the concrete into an annular gap between the bore and a demountable mould (3). Dry sand, gravel and cement is fed (18) to a lance (19) to be mixed with water (20) before projection. The pressure of projection effects the compaction of the concrete, and a ventilated shield (13) may be placed over the leading mould aperture during jetting. The mould may be in three demountable longitudinal sections (4A,4B), the trailing section (4A) being demounted and moved forward on a trolley to obtain a construction cycle.
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