| 摘要 |
A low CO2e emission trenching unit comprising a soil retention and feeder unit 7, a trenching blade 1 and a tractor unit or backhoe arm. A void formed by the forward movement of blade 1 is maintained in an open configuration for the insertion of drainage pipes or units, or cabling. A void may be created in a range of soils substantially without the soil being mixed. A method of trenching comprising forward movement of trenching blade 1 such that soil retention unit 7 provides a substantially spoil-free void. The method may comprise laying visual alerting tape over cable, pipes, or drains in the soil. The method may comprise laying cable or gas or water piping and warning tape in a single operation. A method of trenching using a self-propelled, towed, winched, or rail-mounted trenching unit comprising a soil retention unit 7 or multiplicity thereof adjustably fitted to one or more base plates 2 to provide one or more substantially vertical voids in the soil by compressing the soil by forward movement of the unit. |
