CN-121980776-A - Shield tunneling machine cutterhead scraper layout modeling method and system based on economic-efficiency cooperative optimization

CN121980776ACN 121980776 ACN121980776 ACN 121980776ACN-121980776-A

Abstract

The invention discloses a shield tunneling machine cutterhead scraper layout modeling method and system based on economic-efficiency cooperative optimization, comprising the steps of selecting corresponding basic parameters based on large shield engineering working conditions and multiple types of scraper functions; the method comprises the steps of analyzing the cooperative relation between the abrasion mechanisms and cutting of different types of scrapers to obtain stressed characteristics and functional division of the scrapers, establishing a multi-type scraper layout model, taking minimized total cutter changing cost and maximized total tunneling distance as objective functions, providing tunneling distance constraint, three Archimedes spiral line position constraint of a center scraper, concentric circle track constraint of edges and transitional scrapers, scraper spacing constraint and balance constraint, constructing a scraper layout optimization mathematical model, and obtaining a scraper layout scheme by utilizing the scraper layout optimization mathematical model. The invention introduces a systematic optimization modeling method, balances engineering cost and tunneling efficiency through multi-objective optimization, and realizes the accuracy and economical improvement of scraper layout.

Inventors

LIU SIJIN
LIU PENG
ZHANG JIYING
ZHAO JIAHONG
WANG HUAWEI
SHI JIAQI

Assignees

中铁十四局集团有限公司

Dates

Publication Date: 20260505
Application Date: 20260105

Claims (14)

1. A shield tunneling machine cutterhead scraper layout modeling method based on economic-efficiency cooperative optimization is characterized by comprising the following steps: Selecting corresponding basic parameters based on the actual working condition of large shield engineering and the functional positioning of multiple types of scrapers, wherein the multiple types of scrapers at least comprise a center scraper, a transition scraper and an edge scraper, and the basic parameters at least comprise the cost, the abrasion loss, the cutting face parameters, the rock mechanical parameters, the cutting parameters and the geometric structure parameters of the scrapers; Analyzing the cooperative relation between the abrasion mechanisms and cutting of the different types of scrapers in the tunneling process, determining the functions of the center scraper, the transition scraper and the edge scraper, dividing work and interacting, and determining the rule of influence of the scraper layout on tunneling efficiency, cutter service life and engineering cost; establishing a multi-type scraper layout model, taking the minimum total cutter changing cost and the maximum total tunneling distance of the scrapers as double optimization targets, introducing the overall balance of the cutterhead as constraint conditions, and simultaneously constructing Archimedes spiral line and concentric circle track constraint, scraper number constraint, installation polar radial polar angle range constraint and scraper spacing constraint; and verifying the solveability of the model by solving the layout model to obtain an optimal scraper layout scheme.
2. The method according to claim 1, characterized in that said basic parameters comprise in particular: constant parameters: Cost for the scraper; Is the abrasion loss of the scraper; , is a cutter blade surface parameter; the shear strength of the rock is MPa; The compressive strength of the rock is MPa; Cutting deep for the cutter; is the abrasion coefficient of the abrasive particles; Is the width of the cutter; a scraper rock breaking angle; is a compact nuclear radius; The decision variable parameter is theta ik in the first place First on the track line The doctor blade is set at a polar angle ρ ik of First on the track line The scraper is provided with a polar diameter n k The number of blades on the track line; Limit the first to penalty function First on the track line The scraper can be installed only according to the layout principle; Is the first First on the track line The tunneling distance of the scraper is set.
3. The modular method of claim 1, wherein the minimized total tool change cost objective function is as follows: ; Wherein FC is total tool changing cost and n k is the first The number of blades on the track line, Limit the first to penalty function First on the track line The doctor blade can only be mounted according to the layout principle.
4. The method of claim 1, wherein the maximizing total tunneling distance objective function is as follows: ; In the formula, Is the first First on the track line The tunneling distance of the scraper is set.
5. The method of claim 1, wherein the tunneling distance calculation constraint is as follows: 。
6. the method according to claim 1, characterized in that the position constraints of the three archimedes' spiral arrangement of the central doctor blade are as follows: ; ; 。
7. the method according to claim 1, characterized in that the position constraints of the arrangement of the edge doctor and the transition doctor in concentric circular tracks are as follows: 。
8. The method according to claim 1, characterized in that the balance penalty constraint of the doctor blade is as follows: 。
9. The method according to claim 1, wherein the range of values of the doctor blade mounting radius is constrained as follows: 。
10. The method according to claim 1, characterized in that the range of values of the doctor blade mounting polar angle is constrained as follows: 。
11. The method according to claim 1, characterized in that the number of center blades is constrained as follows: 。
12. The method of claim 1, wherein the pitch constraint of the center doctor is as follows: 。
13. The method according to claim 1, characterized in that the spacing constraints of the edge doctor and the transition doctor are as follows: 。
14. A shield tunneling machine cutterhead scraper layout modeling system based on economic-efficiency cooperative optimization is characterized by comprising the following components: The first module is set to collect basic parameters such as scraper cost, abrasion loss, rock mechanical parameters and the like based on the working condition of the large shield engineering and the functions of the multiple types of scrapers; The second module is arranged for analyzing the cooperative relation between the scraper abrasion mechanism and the cutting, and determining the influence rule of layout on tunneling efficiency and cost; The third module is set to set up a double-target scraper layout optimization model by taking minimized cutter changing cost and maximized total tunneling distance as objective functions and providing constraint conditions such as track, number and spacing; and the fourth module is used for verifying the validity of the scraper layout optimization mathematical model, outputting the solving result of the scraper layout optimization model and forming an optimal scraper layout scheme.

Description

Shield tunneling machine cutterhead scraper layout modeling method and system based on economic-efficiency cooperative optimization Technical Field The invention belongs to the technical field of shield tunneling, and particularly relates to a shield machine cutterhead and scraper layout modeling method and system based on economic-efficiency cooperative optimization. Background With the acceleration of the urban process and the increase of the development demands of underground space, large-diameter shield tunnel engineering is increasingly increased worldwide. The scraper is used as a key component of the cutting system of the shield machine, has unique effect in the rock breaking and soil disturbance processes, and the reasonable layout configuration of the scraper not only can ensure the running stability of the shield machine, improve the tunneling efficiency and the economical efficiency of the construction process, but also can greatly improve the adaptability of the shield machine under complex geological conditions. At present, from the existing literature, the aim of balancing tunneling efficiency and engineering cost can be achieved through a mathematical modeling and algorithm optimization mode. The research on the scraper layout mainly surrounds the optimization of a classical layout mode, analysis of a wear mechanism and the like, on one hand, a learner cuts in from the angles of balance and suitability of the scraper layout, a mathematical model is built through a wear coefficient method and a tunneling coefficient method, the rationality of an Archimedes spiral line and a plane symmetry principle in engineering layout is verified, the applicability of the principle is verified by combining actual engineering data, on the other hand, a staged optimization layout thought is provided on the basis, the scraper is divided into three types of a center scraper, a transition scraper and an edge scraper, the center scraper adopts a three Archimedes spiral line scheme to ensure the balance of the central area of a cutter disc, the edge scraper combines with spoke and web to ensure the excavation radius and enhance the peripheral rock breaking capacity, and the transition scraper adopts concentric circle layout to smooth cutting transition, so that the balance of stress and the cutting efficiency are successfully realized. In addition, research on the abrasion mechanism of the scraper is also carried out, and the abrasion rule is revealed through a method combining numerical simulation and theoretical analysis. The method has the advantages that the discrete element model is built by utilizing SolidWorks and EDEM, the abrasion rule of the scraper under various complex stratum is researched, an abrasion formula is deduced by combining theory, and engineering data verification proves that the optimized layout can prolong the service life and reduce the tool changing frequency, and particularly has outstanding effect in the complex stratum. In addition, an extended spiral line arrangement method is studied, double spiral lines for a large-radius area of a cutter head are provided, single-cutter abrasion is reduced by increasing the number of cutters, minimum cutter numbers of different-radius areas are determined by combining coefficient analysis, abrasion is balanced, and a new direction is provided for arrangement of large-diameter shield scrapers. Optimization of doctor blade layout is not only at the theoretical level, but also verified in part of the engineering project. By taking Beijing subway 19 wire engineering as an example, the abrasion rule of the scrapers in different arrangement modes is analyzed based on JTS formula, and the arrangement modes of the tearing cutters with large height-difference wide spacing and small height-difference narrow spacing are compared, so that the scraper is found to have stronger protection effect on the scrapers, and the abrasion rate can be effectively reduced. In the current only research on the doctor blade layout, there is not too much optimization of mathematical modeling of the doctor blade position, and most of the problems of the layout of the cutter are solved through simulation and direct layout. The current doctor blade layout research still has three key limitations, namely, firstly, the problem is not solved from the optimization perspective, and comprehensive consideration of constraints and balance of optimization targets are absent. Second, there is no concern about the coordination of cost and tunneling efficiency. Third, there is a lack of comparative analysis of the optimization scheme. Disclosure of Invention The invention provides a shield tunneling machine cutterhead scraper layout modeling method and system based on multi-objective optimization for solving the technical problems in the background art. The invention adopts the following technical scheme that the shield tunneling machine cutterhead scraper layout modeling method based on eco