Bottom contact grouting arrangement structure of water conveyance tunnel steel lining and grouting method thereof
A technology for arranging structures and water delivery tunnels, which is applied in infrastructure engineering, hydropower, water conservancy projects, etc. It can solve the problems of poor grouting effect, large construction interference, and large quantity, so as to improve the grouting density and save engineering costs , The effect of simple construction technology
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Embodiment 1
[0028] Such as image 3 As shown, the steel lining 1 is a high-strength steel lining, and the specific implementation steps are as follows:
[0029] 1. Embedding of the grouting pipe 4: take 30-50m as a grouting section (subject to the well-controlled grouting pressure and grouting quality), and lay the grouting section close to the outer wall of the steel liner 1 bottom plate for a long length in each grouting section. Both the pipe 4 and the slurry inlet pipe pass through the slurry hole 3 at the bottom of the stiffening ring 2; the slurry inlet pipe 4 does not use a conventional seamless steel pipe, but chooses a commercially available one that has been used in some hydropower station projects A special grouting pipe (such as FUKO pipe) material that can discharge slurry along the entire pipe section, and can only discharge slurry but not enter slurry;
[0030] 2. Embedding of the exhaust and grout return pipe 5: In consideration of ensuring the quality of contact grouting...
Embodiment 2
[0033] Such as Figure 4 As shown, the steel lining is a low-alloy steel lining, and the specific implementation steps are as follows:
[0034] 1. For low alloy steel lining (standard tensile strength is less than 540N / mm 2 ), taking 30-50m as a grouting section (subject to the fact that the grouting pressure and grouting quality can be well controlled), since the steel lining 1 can be opened, in each grouting section, every 5-8m on the bottom plate of the steel lining 1 Open a reserved hole 1-1, and set plugs and plugs in the reserved holes (reserved holes 1-1 can refer to the consolidation grouting holes to set up plugs, plugs and other components);
[0035] 2. Embedding of the grout inlet pipe 4: In each grouting section, the grout inlet pipe 4 is laid along the outer wall of the bottom plate of the steel lining 1, and the grout inlet pipe 4 passes through the grout hole 3 at the bottom of the stiffening ring 2;
[0036] 3. Embedding of the exhaust and grout return pipe 5...
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