Subdivided unequal-strength grouting reinforcement method adapted to tunnel construction close to building
A technology of grouting reinforcement and building, which is applied in the field of strong grouting reinforcement to achieve the effect of reducing reinforcement cost and good differential settlement
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Embodiment 1
[0035] like figure 1 As shown, when the tunnel 2 needs to pass through the bottom of the building 1, grouting reinforcement is required between the building foundation 5 and the tunnel 2, and the reinforcement method of the present invention is realized through the following steps.
[0036] Step 1, determining the scope of the grouting reinforcement area according to the positional relationship between the tunnel 2 and the building 1;
[0037] In the construction where the tunnel 2 passes through the building 1, the grouting reinforcement area is generally set up under the building foundation 5 and above the tunnel 2. The length of the grouting reinforcement zone is mainly determined by the settlement tank width coefficient i (see figure 2 ) to determine, generally 5i length. The thickness of the grouting reinforcement area is generally 2-4m, and the width of the grouting reinforcement area is determined according to the width of the building foundation 5, usually not less ...
Embodiment 2
[0050] When the tunnel passes through the lower side of the building, this embodiment is different from Embodiment 1 when implementing the reinforcement method of the present invention: the grouting reinforcement area can be divided into left and right areas, which are respectively low-strength grouting The ratio of the length and dimension of the high-strength grouting area and the high-strength grouting area can be determined according to the geological conditions and the positional relationship with the building, and the width of the grouting reinforcement area is not less than the width of the building foundation. And choose the type of slurry reasonably according to the geological conditions and the conditions of the buildings. The strengthening method will be further described below through specific examples.
[0051] In a heat power external line project, the whole heat power line is constructed by submerged underground excavation method. The west side of the tunnel pro...
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