Method for pouring bituminous mortar in deep slotted hole

Abstract

The invention provides a method for pouring bituminous mortar in a deep slotted hole during water leakage repairing in a deep position (the depth is 10 m at least) of a bituminous concrete impervious core wall in projects of water conservancy and water-power engineering earth and rockfill dams and tailing debris retaining dams. According to the method, the slotted hole is drilled in the bituminous concrete core wall, the bituminous mortar is poured in the slotted hole upwards from the bottom of the slotted hole, and the bituminous concrete core wall leaking water in the deep position is quickly repaired. The method is simple and reliable, the effect that the poured bituminous mortar and bituminous concrete of the hole wall are integrated can be guaranteed, and the cooled bituminous mortar and an external building form a complete structural body.

Description

Technical field: [0001] The present invention relates to a method for pouring asphalt mortar in deep slots for repairing water leaks in the depth of asphalt concrete anti-seepage core walls (at least 10m in depth) in earth-rock dams and tailings dams in water conservancy and hydropower projects method. Background technique: [0002] In the construction of roller compacted or poured asphalt concrete core walls of earth-rock dams in water conservancy and hydropower projects, water leakage will not occur when the porosity of asphalt concrete is not greater than 4%, and water leakage often occurs between the two layers of asphalt concrete. [0003] The rolling and pouring asphalt concrete anti-seepage core wall structure of the earth-rock dam has the advantages of small engineering volume, fast construction speed, and no interference to the dam construction; the rolling and pouring asphalt concrete is used as the anti-seepage in the design of the earth-rock dam The core wall ma...

AI Technical Summary

Problems solved by technology

In our country, the technology of applying RCC as the anti-seepage core wall in earth-rock dams is uneven, while the RCC or cast-type asphalt concrete core wall is constructed layer by layer, and each layer is even every 1 meter. Water leakage will occur if the interlayer bonding is not good; especially the cast asphalt concrete core wall is prone to water leakage due to the separation of aggregates or insufficient vibration; the asphalt concrete core wall will inevitably have interlayer water leakage. Leakage of the asphalt concrete core wall was discovered when the project had been completed, and such incidents had already occurred in the completed dam; after the completion of the dam, it was not only difficult to excavate the asphalt concrete for re-construction, but also had to excavate the dam shell material at the same time. Rebuild the dam, the repair cost is very high and time-consuming; the current solution is to make a cement concrete cut-off wall in the dam shell material, which has a long construction period, high cost and low reliability

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