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Construction method of backfilling base of railway crossing giant karst cave

A construction method and technology of karst caves, which are applied in the direction of filling, earth square drilling, mining equipment, etc., can solve problems such as inability to ensure the compactness of backfill, inability to effectively control later settlement, poor stability of cave walls, etc., and achieve good economic benefits and Social benefits, solving the problem of spoilage, and improving the effect of compactness

Active Publication Date: 2021-08-31
CHINA RAILWAY ERYUAN ENG GRP CO LTD
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method is only suitable for the development of small dry karst caves at the bottom of the tunnel. For large and karst cave halls, the cavity is large and the stability of the cave wall is poor. It is not feasible to pour the backfill directly from the upper part for backfilling, especially for large height and span. For giant empty karst caves, using this construction method, the dumping height is hundreds of meters. On the one hand, the violent vibration caused by the dumping of the backfill may cause the wall of the cave to collapse; on the other hand, direct dumping cannot guarantee the compactness of the backfill. The late settlement cannot be effectively controlled, and the safety of construction and operation cannot be guaranteed

Method used

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  • Construction method of backfilling base of railway crossing giant karst cave
  • Construction method of backfilling base of railway crossing giant karst cave
  • Construction method of backfilling base of railway crossing giant karst cave

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Embodiment

[0039] like Figure 1-8 As shown, a kind of construction method of the basement backfilling of a railway passing through a giant karst cave according to the present invention comprises the following steps:

[0040] ① if figure 1 and Figure 8 As shown, at the cave hall 100 slope foot along the underground river 7 water flow direction apart from its right cave wall 50m distance, set up detour drainage tunnel 6, divert the underground river 7 described in the karst cave hall 100 range, divert the underground river 7 Water diversion from upstream to downstream;

[0041] ② if figure 2As shown, the first channel 1 is constructed on the side of the slope foot of the cave hall 100, and the first channel 1 is connected to the cave wall. At the intersection of the first channel 1 and the cave hall 100, a 10m backfilling is performed by throwing and filling blocks. The first construction platform 101 of ×10m, the first construction platform 101 is flush with the bottom of the first...

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Abstract

The invention discloses a construction method for backfilling the base of a railway crossing a giant karst cave. A plurality of passages connecting the walls of the karst cave hall are constructed from bottom to top, and the karst cave hall is backfilled in stages and compacted layer by layer through the passages. For the karst cave hall, the method of multi-channel graded backfilling and layered compaction is adopted to improve the compactness of the backfill body, effectively control the later settlement of the foundation, and avoid the problems that the existing integral backfill method is difficult to compact the backfill body and effectively control the foundation settlement, reducing construction costs. risks and ensure the safety of railway operations.

Description

technical field [0001] The invention relates to the field of tunnel construction, in particular to a construction method for backfilling the base of a railway passing through a giant karst cave. Background technique [0002] my country is one of the countries with the widest distribution of karst in the world. With the large-scale construction of railways, a large number of railway projects passing through various types of karst caves will inevitably appear. [0003] At present, when the railway passes through the karst cave, construction solutions such as backfill are generally adopted. During construction, the backfill body is poured into the bottom of the karst cave from the tunnel revealing the karst cave until it is backfilled to the design elevation of the tunnel filling surface. However, this method is only suitable for the development of small dry karst caves at the bottom of the tunnel. For large and karst cave halls, the cavity is large and the stability of the cav...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21F15/00E21F17/103
CPCE21F15/00E21F15/005E21F17/103
Inventor 汪勇卿伟宸殷召念朱勇喻渝郑杰元郑伟张磊刘明付敏王能袁伟
Owner CHINA RAILWAY ERYUAN ENG GRP CO LTD
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