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

A construction method and irregular technology, applied in infrastructure engineering, soil protection, construction, etc., can solve the problem that the corner pores of irregular karst caves cannot be fully filled, the concrete structure is harmful to the environment, and it is difficult to meet the strength standard of landfill, etc. problems, to achieve the effect of wide applicability, avoid high cost, and no safety hazards

Active Publication Date: 2016-06-15
NO 1 ENG CO LTD OF FHEC OF CCCC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

Method used

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

Examples

Experimental program
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Effect test

Embodiment 1

[0036] Embodiment 1: as Figure 1 to Figure 10 As shown, an irregular shallow cave reinforced grouting filling structure, including soil-rock mixed filler 3. The bottom 7 of the karst cave has a mound-like soil-rock mixed filler bottom layer 8 in the middle that is higher than the periphery. A number of layers of grouting pipes arranged at interval heights and arranged in a helical line are arranged in several layers of earth-rock mixed filler, and vertical steel bars and injected grout are arranged in each layer of earth-rock mixed filler in a plum blossom-shaped distribution at intervals; :

[0037] The grouting pipe 4 is used for grouting from the top of the cave 1 into the soil-rock mixed filler. The grouting pipe is a composite pipe with a diameter of 28-35mm, and the composite pipe is a high-strength composite material hose, which should ensure compression resistance. Two centrally symmetrical grouting holes are arranged on the composite pipe every 0.4-0.6m. The diame...

Embodiment 2

[0049] Example 2: The irregular shallow buried cave is located 2m below the ground level, the diameter of the bottom of the cave is 10m, the diameter of the top is 4m, and the height of the cave is 10m. The landfill structure of earth-rock mixture (tube name: filler layer) has 4 layers in total, and the filler is earth-rock mixture obtained locally. The average thickness of each filler layer is 3m, and each layer is buried in its upper and lower parts, both of which are 1.5m in length, with grouting pipes arranged in the middle. The outer ring of each layer of grouting pipe is 1m away from the cave wall, and spirally surrounds the cave wall to the center of each layer at a parallel interval of 1m. One end is closed and the other end is open, and the open grouting end is led out to the surface to facilitate grouting. Each layer of vertical reinforcement is 3m long and 10mm in diameter, arranged in a plum blossom shape around the center of the packing layer, and embedded in the ...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D3/12
CPCE02D3/12
Inventor 光明王少辉孙保志钟祺姜明元
Owner NO 1 ENG CO LTD OF FHEC OF CCCC
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