Engineering modeling method of shield thrust control based on trial excavation segment data

Abstract

The invention provides an engineering modeling method of shield thrust control based on trial excavation segment data. The method comprises the following steps: 1, establishing a steady thrust component model Fe; 2, establishing a dynamic thrust component model Fo; 3, establishing an excavation thrust control model F: F=Fe+Fo; 4, based on data collected in a trial excavation segment, by the adoption of a least squares algorithm, fitting concrete values of model coefficients in the steps from the step 1 to step 3; 5, by the adoption of the established models in the steps from the step 1 to step 3 and the model coefficients fitted in the step 4, calculating a control objective of excavation thrust in follow-up construction. According to the method, the theoretical research results of the internal influence mechanisms among the excavation thrust, the geological conditions and the excavation states are integrated, and meanwhile the extraction of actual working condition information in the process of trial excavation segment data collection of a particular project is combined. By means of the method, a quantitative prediction model for controlling the thrust parameters used for shield construction can be established rapidly and effectively.

Description

technical field [0001] The invention relates to an engineering modeling method. In particular, it relates to an engineering modeling method for shield thrust control based on trial excavation section data. Background technique [0002] The shield machine is a typical excavation equipment in underground engineering. It has the characteristics of complex structure, large volume, heavy load and so on. It has been widely used in various tunnel constructions. Due to the complex geological conditions and extreme underground environment during its work, the construction conditions are harsh and the safety risks are high, which has high requirements for equipment operation and control. The driving thrust is one of the most important control parameters of shield equipment, which needs to be adjusted in real time as the geological conditions during construction and the operating state of the equipment change. At present, in the initial stage of most shield tunneling projects, a tria...

AI Technical Summary

Problems solved by technology

It is still impossible to quantitatively determine the reasonable control scheme of the corresponding thrust in view of the change of geological conditions in the subsequent construction, the change of the buried depth of the tunnel, and the adjustment of the excavation speed of the equipment

Once the thrust is not properly controlled during excavation, it may cause major disasters and accidents, resulting in equipment damage or damage to the upper ground and buildings