Method for treating boulders in reinforced zone of starting end

A treatment method and technology for boulders, which is applied in the field of boulder treatment in the reinforcement area at the starting end, can solve problems such as equipment damage, large impact on shield construction, and impact on construction period

Inactive Publication Date: 2020-04-24
CHINA RAILWAY TUNNEL GROUP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The existence of boulders has a great impact on shield tunneling construction, which can easily lead to ground subsidence and equipment damage, thereby affecting the construction period

Method used

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  • Method for treating boulders in reinforced zone of starting end
  • Method for treating boulders in reinforced zone of starting end
  • Method for treating boulders in reinforced zone of starting end

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Experimental program
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Embodiment Construction

[0036] A method for treating boulders in the reinforcement area at the originating end. According to the conditions of the boulders in the reinforcement area at the originating end, three boulder processing methods, namely, blasting, mechanical treatment by rotary drilling, and crushing of submerged holes, are compared and analyzed. It is determined that the boulder treatment in the reinforcement area at the starting end mainly adopts the construction method of submerged hole density hole crushing.

[0037] Further, the specific method of comparative analysis is as follows:

[0038] (1) Analysis of the impact on reinforcement, main structure, and outer plain wall

[0039] Due to the particularity that the boulder at the starting end is inside the reinforcement body and is close to the main structure and the outer wall, the treatment of the boulder in the reinforcement area of ​​the starting end must fully consider the impact of the boulder treatment on the reinforcement body a...

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PUM

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Abstract

The invention discloses a method for treating boulders in a reinforced zone of a starting end. According to the condition of the boulders in the reinforced zone of the starting end, three boulder treatment manners of boulder detonation, rotary excavating and drilling mechanical treatment and in-hole perforated smashing are compared and analyzed, it is confirmed that the construction method of in-hole perforated smashing is mainly adopted for treating the boulders in the reinforced zone of the starting end, and safe and smooth conduction of shield construction is achieved.

Description

technical field [0001] The invention relates to a shield excavation method, in particular to a method for treating boulders in a reinforcement area at the starting end. Background technique [0002] In recent years, with the continuous development of society, more and more rail transit constructions are carried out on a large scale. The bedrock is controlled and influenced by the geological structure conditions, magma composition and surrounding rock material composition, and it is easy to develop undeveloped structures during the weathering process. Weathered or slightly weathered hard spheroids, that is, "solitary rocks", will encounter more complex engineering geological conditions and more difficult engineering geological problems during the construction process. During the shield construction process, the boulders processed by the built-in crusher of the shield machine have a great impact on the shield construction. In the slightest, it will cause tool wear, blockage of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D9/14E21D9/00E21D11/10
CPCE21D9/001E21D9/006E21D9/14E21D11/10
Inventor 陈馈韩伟锋张兵陈桥王利明陈瑞祥郭璐王发民高会中任颖莹苏文德彭正勇徐黎明
Owner CHINA RAILWAY TUNNEL GROUP CO LTD
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