Anchor spraying foundation surface water seepage drainage device and construction method

Abstract

The invention provides an anchor spraying foundation surface water seepage drainage device and a construction method. The device comprises a PVC waterproof board, a galvanized steel pipe, a valve, filter screens, a mortar leveling layer, holes and a water-permeable material backfilling layer, wherein the galvanized steel pipe penetrates through the mortar leveling layer and the PVC waterproof board, the valve is arranged at one end of the galvanized steel pipe, the water-permeable material backfilling layer is arranged at the periphery of the other end of the galvanized steel pipe, and a portof the galvanized steel pipe is attached to the water seepage position; the holes are formed in the galvanized steel pipe penetrating through the PVC waterproof board, and the filter screens are arranged on the outer side of the galvanized steel pipe with the holes and on the portion, attached to the port of the water seepage position, of the galvanized steel pipe.

Description

technical field [0001] The invention relates to the field of water seepage treatment, in particular to a water seepage drainage device and a construction method for an anchor spray base surface. Background technique [0002] At present, 800@1100MM enclosure piles are used for the station enclosure structure in the foundation pit treatment. The geology is micro-expansion geology. The waterproofing of the station structure is mainly based on structural self-waterproofing and waterproofing membranes. The main waterproofing method is: floor waterproofing layer construction Pour plain concrete cushion, 200mm thick C20 concrete, and then lay a single layer of 4mm thick double-sided sticky asphalt-based polyester tire pre-paved waterproof membrane PY type for waterproofing, then pour a 50mm waterproof protective layer, and finally construct the floor concrete, The side wall is first hanged with sprayed concrete, and then plastered and leveled with cement mortar, and then a single l...

AI Technical Summary

Problems solved by technology

[0004] Anchor spraying is often used to support the surrounding rock underground in the station to increase the stability of rock blocks and rock formations. However, during the construction of the station, due to different periods of groundwater or insufficient underground drainage, there is water seepage on the base surface of the anchor spraying. During the concrete pouring process, the foundation The surface contains water seepage, which increases the water-cement ratio of concrete and affects the strength and impermeability of concrete

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