Seepage-proofing bearing structure of soft soil pressure tunnel

Abstract

The invention relates to a composite lined carbon fiber sheet type seepage-proofing bearing structure of a soft soil pressure tunnel. The seepage-proofing bearing structure comprises a spliced pipe piece ring formed by construction adopting a shield tunneling method; the spliced pipe piece ring is a reinforced concrete outer lining; a water drainage preventing cushion layer is paved on the inner surface of the outer lining; concrete is directly poured on the inner surface of the water drainage preventing cushion layer to form a reinforced concrete inner lining; the total section of the inner surface of the inner lining is adhered with one or a plurality of carbon fiber sheet layers. The seepage-proofing bearing structure disclosed by the invention has the advantages of overcoming the defects of large construction difficulty, high cost and long construction period of a steel plate inner lining and a pre-stressed concrete inner lining, satisfying the bearing requirements of a composite lined structure of the soft soil pressure tunnel, also effectively solving the technical problems of tunnel safety and outward seepage of internal water of a high-pressure water conveying tunnel, and having a wide application prospect in the field of soft soil stratum stressful water conveying tunnels.

Description

technical field [0001] The invention belongs to the field of tunnel engineering and relates to an anti-seepage bearing structure suitable for pressure tunnels in soft ground. Background technique [0002] In hydraulic structures, pressure water delivery tunnels are very common, but most of them are mountain tunnels. Tunnels constructed by the shield method in soft ground are mostly traffic tunnels at home and abroad, or non-pressure and low-pressure water delivery tunnels, and there is no problem of internal water seepage affecting the stability of the tunnel. Assembled segment rings can be used. As a permanent lining; however, for water delivery tunnels with higher water delivery pressure requirements, it is difficult for assembled segment rings to meet the anti-seepage bearing requirements as a permanent lining. [0003] In order to meet the anti-seepage and load-bearing requirements of high-pressure water delivery tunnels in soft ground, a steel lining of a certain thick...

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Problems solved by technology

But above-mentioned invention has the following deficiencies: (1) because the tension channel and the anchor groove of the prestressed anchor cable will be reserved in advance, the vertical formwork and pouring process of the lining concrete are complicated; (2) because the lining concrete needs to reach a certain The tensioning and anchoring work of prestressed tendons can only be carried out after the strength level of the prestressed tendon is reached, and the construction period of the prestressed lining is relatively long; A series of processes such as backfilling and grouting of the anchorage groove, the process is complex and the construction requirements are high

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