Tunnel vault anti-void early warning device and concrete real-time monitoring method thereof
An early warning device and concrete technology, applied in tunnels, measuring devices, earthwork drilling and mining, etc., can solve problems such as threats to driving safety, operation and safety impacts, cracking and falling of tunnel arches, etc., to prevent vaults from falling out and improve Construction quality, waste reduction effect
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[0040] according to Figure 1-6 , the tunnel vault anti-void early warning device and its concrete real-time monitoring method include the following steps;
[0041] Step 1. Leveling the initial support of the tunnel: When the tunnel excavation is under-excavated, carry out secondary drilling and supplementary shots, and excavate the under-excavated part to the design contour line. When the tunnel excavation is over-excavated, use the same grade of concrete backfill Dense, after the initial support is completed, use a 1m ruler to check the surface flatness of the initial support. The flatness of the initial support surface meets the requirements of D / L≤1 / 10 (D is the adjacent two convex and concave surfaces of the initial support base surface. The depth of entry; L is the distance between the two adjacent convex surfaces of the base, and L≤1m), if it does not meet the requirements, it should be treated with shotcrete or chiseled concrete;
[0042] Step 2: Laying and hanging th...
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