| 主权项 |
1. A machine arranged for automatically sawing micro trenches and placing ducts/cables in micro trenches in one single process; said machine comprising a diamond saw blade arranged for sawing a micro trench with up-cuts in an area comprising a first layer L1 being a surface layer, such as asphalt or concrete, and a second layer L2, comprising for example gravel, stones and soil and being a bearing layer to and located below said first layer L1; wherein said saw blade is arranged to saw through said first layer L1 and into said second layer L2; said machine further comprising a stabilizing device having side elements arranged for stabilizing the walls of said micro trench until ducts/cables have been placed into said micro trench; said stabilizing device further comprising a front part and a back part; said front part having a shape that is complementary or near complementary to the shape of said saw blade and being positioned immediately behind said saw blade in said micro trench so that, in operation, rocks or other objects cannot fall down between said saw blade and said front part; said back part comprising an inlet, an outlet and guiding means for guiding at least one duct/cable into said micro trench; wherein said inlet and said outlet are connected to each other by means of said guiding means; wherein, when in operation, said inlet is positioned above ground level and said outlet is positioned below ground level; said guiding means being arranged to change the direction of said ducts/cables from vertical or near vertical at ground level to horizontal or near horizontal at said outlet;
wherein, during sawing and placing ducts/cables in said micro trenches, a distance between said outlet and said saw blade, measured horizontally at ground level, is longer than the minimum allowed bending radius for the ducts/cables to be installed, wherein said distance is larger than 100 - 500 mm depending on the minimum allowed bending radius for said ducts/cables; wherein said stabilizing device is further arranged to lay ducts/cables for a distribution network and/or access network according to a predefined layout; wherein said stabilizing device and guiding means are dimensioned according to the size and the number of said ducts/cables according to said predefined layout; said stabilizing device is further prepared to, under control of one or more said guiding means, each of which may be guiding one or a number of said ducts/cables, guide said ducts/cables into said micro trench in a number of combinations of said ducts/cables, of at least one size, in a controlled and ordered way to a specified laying depth; and wherein said stabilizing device and said saw blade are arranged to be lowered to and elevated from their respective operating depths by one or more engine means and/or hydraulic means; wherein the operating depth d for said saw blade is larger than the depth d1 of said first layer L1 together with the combined height d2 of said at least one duct/cable in said micro trench so that d>d1+d2; wherein the operating depth d for said saw blade is further less than or equal to 500 mm; wherein the operating depth for said stabilizing device in said micro trench is less than the operating depth for said saw blade; and wherein the difference in operating depth between said saw blade and said stabilizing device in said micro trench is adapted to the changes of the ground level; the highest position to which said stabilizing device and said saw blade, respectively, may be elevated to is a position suitable for easy replacement of respective device. |
