Land surface grouting and water blocking construction method of tunnel

Abstract

The invention discloses a land surface grouting and water blocking construction method of a tunnel. The method comprises a contour and an outer contour of the tunnel to be grouted and water-blocked are determined, top and bottom surfaces, left and right contour surfaces and left and right side surfaces are set, vertical grouting holes are set from the left side surface to the right side surface, the left and right side surfaces are arranged along the horizontal direction of a construction space, the tail ends of the vertical grouting holes positioned between the left and right contour surfacesabut against the outer contour of the tunnel to be grouted and water-blocked, and the tail ends of the vertical grouting holes positioned between the left and right side surfaces and the between theleft and right contour surfaces are all set as the bottom sides of the construction space; after that a sleeve valve pipe is placed in each vertical grouting hole segment by segment till the tail endof the grouting hole, a configured sleeve casing material is injected between the sleeve valve pipe and the vertical grouting hole; and a grouting core pipe carries out land surface grouting on the sleeve valve pipe, and the range from the tail end of the grouting hole to more than 5m over the vault of the outer contour of a section to be grouted and water-blocked is set as a grouting and water blocking area.

Description

technical field [0001] The invention relates to the technical field of tunnel engineering, in particular to a construction method for preventing tunnel water leakage. Background technique [0002] With the increasing scale of railway construction, there are more and more high-speed railway tunnels. After the construction of the tunnel is completed, during the period of heavy rain in the rainy season, the water flows along the tunnel wall to fill the tunnel, and some existing operating tunnels and tunnels under construction and completed tunnels have deep seepage and water leakage, which poses a very high potential safety hazard, and even seriously affects the safety of the tunnel. Normal use. Among them, two types of tunnels are very prone to this situation: the first type is the open hole backfill type, and there are rolling weak areas around the tunnel wall (such as figure 1 shown); the second type is the broken and shallow buried type, even forming a collapse funnel abo...

AI Technical Summary

Problems solved by technology

But, this invention still has the following disadvantages or deficiencies: (1), the grouting water blocking method of this tunnel is only applicable to the tunnel that adopts anti-adhesive waterproof coiled material as the waterproof layer, and has high requirements for the type of tunnel; (2), it needs Changing the drilling depth of the grouting hole for water plugging increases the difficulty and complexity of the operation

But this invention still has the following shortcomings or deficiencies: (1), this method is not suitable for the water blocking work of existing tunnels and completed tunnels under construction; (2), this method will destroy the lining structure of tunnels

Images