Foundation pit trestle arrangement optimization method based on niche genetic algorithm

A technology of genetic algorithm and optimization method, applied in the field of foundation pit trestle design, can solve the problems of restricted arrangement of foundation pit trestle, and achieve the effect of layout optimization

Pending Publication Date: 2022-06-17
SHANGHAI CONSTRUCTION GROUP
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  • Abstract
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  • Application Information

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Problems solved by technology

[0005] In order to solve the problem in the prior art that the layout of trestle bridges in foundation pits is restricted by the experience of

Method used

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  • Foundation pit trestle arrangement optimization method based on niche genetic algorithm
  • Foundation pit trestle arrangement optimization method based on niche genetic algorithm
  • Foundation pit trestle arrangement optimization method based on niche genetic algorithm

Examples

Experimental program
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Example Embodiment

[0053] Example 1

[0054] like figure 1 As shown, a method for optimizing the arrangement of foundation pit trestle bridges based on a niche genetic algorithm provided by this embodiment includes the following steps:

[0055] S1. Number the space units enclosed by the support beam of the foundation pit, and establish a database of adjacent units and a unit size database for each space unit; determine the database of units at the entrance and exit, the database of necessary units, and the database of necessary units according to the situation of the project site;

[0056] S2. Determine and calculate the population size M, and randomly generate M types of trestle unit arrangement combinations according to each database in step S1 to form the initial parent population P(t); define the trestle arrangement and optimize the objective function f and trestle row corresponding to each target The penalty function g of the optimization constraints is distributed, and the fitness functio...

Example Embodiment

[0110] Embodiment 2

[0111] The feasibility of the algorithm proposed in this paper is verified by an example of the optimization of the layout of a rectangular foundation pit trestle with a relatively simple engineering plane. According to the foundation pit support layout diagram provided by the foundation pit enclosure design, number the unit blocks formed by the support beams, set the adjacent unit number family library to detect the continuity of the trestle layout, and set according to the actual situation of the project It is necessary to set the regional conditions of the trestle board, and use the above optimization algorithm to use MATLAB software to program and calculate the multi-objective optimization solution of the foundation pit trestle optimization.

[0112] The plan of the original foundation pit support and trestle bridge provided by the foundation pit enclosure design unit for a project is as follows image 3 As shown, there are 3 entrances and exits arou...

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Abstract

The invention discloses a foundation pit trestle arrangement optimization method based on a niche genetic algorithm. The foundation pit trestle arrangement optimization method comprises the steps of establishing an adjacent unit database, a unit size database, an entrance and exit unit database, a necessary unit database and a necessary unit database; randomly generating an initial parent population P (t), defining an objective function f and a penalty function g, and establishing a fitness function F of trestle multi-objective optimization; generating a combination N (t) according to the fitness function value F of each arrangement combination individual; and generating a new population PN (t) by using crossover, mutation operation and niche technologies, and forming a new parent population PNew (t) to enter the next iterative calculation until a preset termination condition is reached, thereby obtaining a trestle optimization scheme. According to the method, the objective function and the penalty function are set, the unified fitness function is established, the optimal layout scheme is obtained through iteration by means of crossover and mutation operation in the genetic algorithm, and a scientific and reasonable optimization scheme is provided for foundation pit trestle layout.

Description

technical field [0001] The invention relates to a method for optimizing the arrangement of a foundation pit trestle based on a niche genetic algorithm, and belongs to the technical field of foundation pit trestle design. Background technique [0002] Foundation pit engineering is an important part of engineering construction. In recent years, with the development of urban underground space, the foundation pit engineering is developing in the direction of large area and deep depth. The proportion of foundation pit engineering in the construction cost and construction period is also increasing day by day. The construction progress of the foundation pit project will directly affect the construction period and investment of the construction project to a greater extent. The current mainstream foundation pit engineering construction method is still open cut and cut and cut. The open cut and cut and cut foundation pit project is mainly composed of three parts: earthwork, support c...

Claims

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Application Information

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IPC IPC(8): G06F30/13G06F30/27G06N3/12G06F111/10G06F111/04
CPCG06F30/13G06F30/27G06N3/126G06F2111/10G06F2111/04
Inventor 梁昊庆
Owner SHANGHAI CONSTRUCTION GROUP
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