Irregular shallow karst cavity ribbing and grouting filling structure and construction method

Abstract

The invention belongs to an irregular shallow karst cavity ribbing and grouting filling structure and a construction method. The structure is characterized in that a moundy earth rockfill mixed padding bottom layer with the middle higher than the periphery is arranged at the bottom of a karst cave, a plurality of layers of slip casting pipes which are distributed in a spiral line manner and spaced by a certain height are arranged in a plurality of layers of earth rockfill mixed padding, and the earth rockfill mixed padding between the corresponding slip casting pipes is filled with vertical reinforcement distributed in a quincunx shape at intervals and injected slurry. The method includes the steps of manufacturing of the slip casting pipes, filling of all layers of earth rockfill mixed padding, paving of all layers of slip casting soft pipes and driving of the vertical reinforcement and injecting of slurry into all layers of earth rockfill mixed padding. According to the structure and the method, shortcomings in an existing irregular shallow karst cavity ribbing and grouting filling structure and an existing construction method are overcome, the backfilling strength standard can be achieved, and the structure and the method have the beneficial effects of being simple in structure, low in construction cost, good in construction quality, high in speed, easy to construct, wide in applicability and good in energy-saving and environment-friendly effect, and saving time and labor.

Description

technical field [0001] The invention belongs to an irregular shallow buried karst cave reinforced grouting filling structure and a construction method. Background technique [0002] At present, in the construction section of building roads or railways, especially in mountainous areas, if there are shallow karst caves, they must be filled, otherwise the construction cannot continue. At present, the widely used filling methods for shallow karst caves mainly include backfilling with earth and rocks, backfilling with concrete, and passage through cover slabs or bridging. [0003] Soil and rock backfilling is relatively economical, but it has poor adaptability to irregular karst caves, the filling is not dense, and it cannot be rolled sufficiently, making it difficult to meet the strength standard of landfill. [0004] Compared with the earth-rock backfill method, concrete backfill also has the defect of insufficient adaptability to irregular karst caves. The corner pores of irr...

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Problems solved by technology

[0003] Soil and rock backfilling is relatively economical, but it has poor adaptability to irregular karst caves, the filling is not dense, and it cannot be rolled sufficiently, so it is difficult to meet the strength standard of landfill

[0004] Compared with the earth-rock backfill method, concrete backfill also has the defect of insufficient adaptability to irregular karst caves. The corner pores of irregular karst caves cannot be fully filled, and it is difficult to meet the strength standard of landfill, and the time and economic costs increase. The concrete structure is harmful to the environment. larger

[0005] Although the method of covering or bridging meets the adaptability to irregular caves, the construction is complicated, the time and economic costs are significantly increased, and the environment is greatly damaged

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