道路工程土石方优化调配模型与工程应用

Optimization Model and Project Application of Earth-rock Allocation in Road Engineering

土石方优化调配是道路工程路基施工的重要问题。通过对土石方调配系统组成、调配关系的系统分析,在考虑开挖、填筑、借土区、弃土区、废料调配的前提下,以系统费用最低为目标,建立了道路工程土石方优化调配线性规划模型。同时,建立了土石方调配的坐标体系,用于计算调配关系中的运输距离,可以极大减少优化计算的数据需求量,增强模型的实用性。工程实践应用表明,本模型实现了对道路工程土石方调配的优化,可以提高开挖料的利用量,减少弃土和借土,最终实现调配系统费用最小化和道路沿线的环境保护。优化模型可以广泛应用于道路、堤防等工程的土石方调配问题中。

Optimization of earth-rock allocation is an important problem in subgrade construction of road engineering. Based on systematical analysis of composition and allocation relations of earth-rock allocation system, we develop the linear programming optimization model for earth-rock allocation in road engineering to achieve the minimum cost of the system. The model takes into account excavation, fill sections, borrow pits, disposal sites and disposal materials. And we constitute the coordinate system for earth-rock allocation to calculate transportation distances. It remarkably decreases the required data amount in optimization calculation and improves the practicability of the model in project practice. Application in actual projects shows that the model realizes optimal earth-rock allocation in road engineering, increases the cut materials usage, reduces borrow and disposal amount, realizes the minimum cost of earth-rock allocation system and environment protection along the road ultimately. The model can be used in earth-rock allocation of road engineering and levee engineering widely.