A Construction Method of Excavating and Concealing Integral Lining

Abstract

The invention discloses a construction method for integral lining by open-cutting and concealing, which includes the following steps: S1, temporarily suspending part of the railway track or occupying the road by framing, and adopting quick pile forming for vertical enclosure; S2, constructing Roof slab support, restore the occupied highway or deactivated railway track; S3, cycle steps S1‑S2; S4, excavate earthwork from the lateral sides of the road or railway track by using concealed digging into the hole; S5, open After excavation, level the tunnel enclosure and the surface of the tunnel roof; S6, make the tunnel waterproof and bind steel bars, and make the main structure; S7, backfill the earth and rock between the main structure and the roof support, and use the reserved grouting holes after the backfilling is completed Press the grout to ensure a tight backfill. Compared with the existing conventional open-cut construction, it avoids the disadvantages of long-term road-occupancy construction. Compared with the conventional underground excavation construction, it overcomes the shortcomings of insufficient initial support rigidity and the need for subdivision of excavation, and improves settlement control and safety. .

Description

technical field [0001] The invention belongs to the field of underground engineering, and in particular relates to a construction method for making an integral lining with open and dark. Background technique [0002] With the expansion of underground space, there are more and more underpassing projects, such as passing through railways or railway yards, conventionally adopt military beam overhead sloping excavation or jacking construction, both of which require long-term occupation of the railway site, It brings great inconvenience to passenger organization and railway operation. [0003] For general underpass roads or roads, military beams 1 are used to erect roads or roads, and grading and excavation 2 are used for construction. The general section is as follows: figure 1 shown. [0004] The underpassing road adopts grading construction or vertical foundation pit construction, and the road needs to be constructed in sections for a long time, occupying the road; the same ...

AI Technical Summary

Problems solved by technology

[0005] Aiming at at least one of the above defects or improvement needs of the prior art, the present invention provides a construction method of open-cut and concealed integral lining, which avoids the disadvantages of long-term road-occupancy construction compared with the existing conventional open-cut construction Compared with conventional underground excavation construction, it overcomes the shortcomings of insufficient initial support rigidity and the need for subdivision of excavation, and improves settlement control and safety

Images