Design and control method of earth pressure balance shield earth chamber pressure in sand and pebble formation
A technology of earth pressure balance shield and earth bunker pressure, which is applied in the fields of earthwork drilling, design optimization/simulation, mining equipment, etc. It can solve problems such as the application of Platts arch theory that needs to be studied, so as to avoid damage and reduce risks. , the effect of improving safety
Active Publication Date: 2022-05-27
BEIJING URBAN CONSTR GROUP +1
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Problems solved by technology
The calculation formula adopted in my country's current code is based on the statistical analysis of hundreds of drill and blast tunnel collapse data in my country. In essence, the calculation method given by the code is an empirical formula, and its scope of application For tunnels constructed by drilling and blasting in rock mass, the application of Platts arch theory to soft tunnels remains to be studied
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[0126] In order to make the purposes, technical solutions and advantages of the embodiments of the present invention more clearly understood, the embodiments of the present invention will be described in further detail below with reference to the embodiments and the accompanying drawings. Here, the exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but not to limit the present invention.
[0127] In the present invention, unless otherwise expressly specified and limited, the terms "installed", "connected", "connected", "fixed" and other terms should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection , or integrated; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of the two elements or the interaction relationship between the two...
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The invention proposes a method for designing and controlling the soil pressure of a sand and pebble formation earth pressure balance shield tunnel, including the following steps: constructing a calculation model of soil loosening and earth pressure under the active limit equilibrium state of the sand and pebble formation above the interface, and calculating the interface Loosening earth pressure; build a calculation model of soil passive failure earth pressure under the passive limit equilibrium state of sand and pebble strata above the interface, and calculate the passive failure earth pressure of the interface; build a calculation model for the ultimate support pressure of the excavation surface, and calculate the limit of the excavation surface Support pressure; calculate the optimal support pressure of the excavation face; calculate the ultimate support pressure of the excavation face considering groundwater; determine the control principle of the support pressure of the excavation face, and design and control the pressure of the shield construction soil bin. The invention can improve the safety of shield tunneling construction, provide a basis for the pressure control of the soil bin in shield tunneling construction, reduce the influence of earth pressure balance shield tunneling construction on the surrounding environment, and play an important role in promoting the construction of urban subways.
Description
technical field [0001] The invention relates to the technical field of shield tunnel construction, in particular to a method for analyzing the stability of an earth pressure balance shield tunnel excavation surface in a sand and pebble stratum, in particular to a method for designing and controlling the pressure of an earth pressure balance shield tunnel in a sand and pebble stratum . Background technique [0002] Shield construction technology is widely used in underground highway and railway tunnel construction due to its high degree of mechanization, low safety risk, fast construction speed, and small impact on the surrounding environment. The insufficient support of the excavation surface during the shield excavation process of the sand and pebble stratum will inevitably lead to the instability of the soil mass on the excavation surface. To reduce the impact of shield construction on the surrounding environment, the support force of the excavation face must be kept with...
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IPC IPC(8): G06F30/13G06F30/20G06F17/12E21D9/06G06F119/14
Inventor 张晋勋孙正阳江玉生武福美江华周刘刚殷明伦张雷李博蒙世宇龙长喜
Owner BEIJING URBAN CONSTR GROUP