초록 ▼

A tubular structure, such as a sewer, is lined by the use of long length elements having edge formations which facilitate a number of the elements being arranged in a side-by-side interlocked configuration within the tunnel structure. At least some of the elements are formed with a cavity into which

A tubular structure, such as a sewer, is lined by the use of long length elements having edge formations which facilitate a number of the elements being arranged in a side-by-side interlocked configuration within the tunnel structure. At least some of the elements are formed with a cavity into which a settable compound may be injected thereby to strengthen the lining when set. Preferably the elements are relatively flexible prior to injection with the settable compound so as to facilitate storage of long lengths on a drum.

대표청구항 ▼

Method of lining a tunnel structure comprising: feeding into the structure a plurality of longitudinally flexible elongate elements at least some of which are lining elements of a kind having at least one cavity which extends substantially continuously in the direction of the length of the element a

Method of lining a tunnel structure comprising: feeding into the structure a plurality of longitudinally flexible elongate elements at least some of which are lining elements of a kind having at least one cavity which extends substantially continuously in the direction of the length of the element and at least some of which are spacer elements each comprising a longitudinally extending rib-like formation, said lining elements and spacer elements each having a pair of longitudinally extending edge formations each for interlocking assembly with a complementay shaped edge formation of an adjacent elongate element of the lining arranging said lining elements and said spacer elements to extend substantially parallel with the direction of the length of the structure with the elements disposed in a side-by-side and interlocking configuration in which the complementary shaped edge formations of adjacent elements are interlocked to form a lining which conforms substantially to the surface of the tunnel structure, the rib-like formations of the respective spacer elements being arranged to lie outwards of the lining wholly between the surface of the tunnel structure and that inward facing surface of the lining defined by the lining elements and to maintain the lining elements spaced from the internal surface of said tunnel structure; and then injecting into said cavities a settable compound and allowing said settable compound to set.