Brush-type spraying device for concrete sprayers
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- 上海鸿得利重工有限公司
- Publication Date
- 2011-10-26
- Estimated Expiration
- Not applicable · inactive patent
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Abstract
Description
technical field
[0001] The invention relates to a spraying device applied to a concrete spraying machine, and in particular discloses a brush-type spraying device for a concrete spraying machine. Background technique
[0002] There are two major theories in tunnel design and construction: one is relaxation load theory, the core content of which is that stable rock mass has self-stabilization ability and does not generate load, while unstable rock mass may collapse and needs to be supported by supporting structures. The load acting on the support structure in this way is the rock mass force of the surrounding rock due to relaxation and possible collapse within a certain range; the second is the rock bearing theory, the core content of which is that the stability of the surrounding rock is obviously the self-stabilizing capacity of the rock mass itself. , there is a process for unstable surrounding rocks to lose their stability. If necessary restrictions are provided during th...