Methods of laying underground conduits
First Claim
1. A method of installing a conduit in the ground comprising digging a trench in the ground while keeping said trench at least partially filled with a thixotropic mud to prevent collapse of the trench walls and installing the conduit in said trench, said thixotropic mud containing hardenable sealing products at least in the part of said trench wherein said conduit is located, and retaining said conduit in said trench to seal it in the ground after said products have hardened.
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Abstract
The invention relates to a method of laying underground conduits along a trench dug into the ground and filled with sludge designed to prevent the trench walls from collapsing.
The trench is at least partly lined with hardenable grout and the conduit laying operations are carried out under the protection of this grout so that, after the same has hardened, it seals the conduit into the ground.
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Citations
11 Claims
- 1. A method of installing a conduit in the ground comprising digging a trench in the ground while keeping said trench at least partially filled with a thixotropic mud to prevent collapse of the trench walls and installing the conduit in said trench, said thixotropic mud containing hardenable sealing products at least in the part of said trench wherein said conduit is located, and retaining said conduit in said trench to seal it in the ground after said products have hardened.
- 4. A method of installing a conduit in the ground comprising digging a trench in the ground while keeping said trench at least partially filled with a thixotropic mud to prevent collapse of the trench walls and installing the conduit in said trench, said thixotropic mud containing hardenable sealing products at least in the part of said trench wherein said conduit is located whereby said conduit is sealed in the ground after said products have hardened, wherein conduit elements for forming said conduit are obturated by sealing means at their ends and weighted prior to being lowered into said trench, and are interconnected when they lie under said mud, the conduit being cleared after the conduit elements have been interconnected.
Specification