格库铁路米兰戈壁区风沙危害成因及防护体系配置模式
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新疆铁道勘察设计院有限公司

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P931.3

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Causes of aeolian sand hazards and configuration mode of the sand-control system in the Milan Gobi area of the Golmud-Korla Railway
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    摘要:

    [目的]格库铁路米兰段地处阿尔金山山前冲洪积戈壁,戈壁风沙危害的有效防治是铁路安全运营亟需解决的关键问题之一。[方法]本研究通过分析区域风况,监测沿线输沙量,观测防沙体系试验段防护效益,最终提出适宜的防护体系配置模式。[结果]研究表明,格库铁路米兰戈壁区属高风能环境,主要起沙风向为NE和ENE,区域年输沙量介于2.15-3.45 m3/m;戈壁之上流动性沙丘以中砂和细砂为主,而戈壁地表以下40 cm范围内沙粒以细砂为主,施工破坏后极易起沙成为新的沙源。观测表明,单道HDPE板、芦苇束和镀锌铁丝网阻沙障阻沙率依次为96.42%、93.85%和76.60%,双道阻沙率分别为97.95%、98.71%和92.78%,整个防护体系阻沙率均达到95%以上。折线形阻沙沙障虽然积沙量大,但折角部位极易被积沙掩埋。[结论]直线形HDPE板阻沙栅栏与芦苇束大网格阻固结合的防沙体系,是适宜于格库铁路米兰戈壁区的防沙体系配置模式。研究结果对保障格库铁路安全运营具有重要意义。

    Abstract:

    [Objective] The Milan Gobi area of the Golmud-Korla Railway is located in the alluvial and alluvial Gobi in front of Altun Mountain, where the effective prevention and control of the hazards caused by gobi wind-blown sand is one of the key problems to be solved in railway safety operation. [Methods] This study analyzed the regional wind conditions, monitored the amount of sand transported along the line, observed the protection efficiency of the test section of the protection system, and finally, put forward the appropriate configuration model of the protection system. [Results] The research shows that the Milan Gobi area of the Golmud-Korla Railway is a high wind energy environment, the main sand driving winds are NE and ENE, and the annual sand transport volume reaches 2.15-3.45 m3/m. The main sand source of the railway sand damage caused by the sand flowing dunes on the Gobi are mainly medium sand and fine sand, while the sand particles within 40cm below the surface of the Gobi are mainly fine sand. After construction damage, it is easy to generate sand and become a new sand source. The results show that the sand resistance rates of single HDPE plate, reed bundle and galvanized chicken wire barrier are 96.42%, 93.85% and 76.60%, and the sand resistance rates of double fences are 97.95%, 98.71% and 92.78%, respectively. The sand resistance rates of the whole protection system are above 95%. Although the amount of sand deposited in the zigzag sand barrier is large, the corner of the zigzag barrier is easily buried by sand deposited. [Conclusion] The sand control system which combines linear HDPE board sand barrier with reed bundle large grid is suitable for the sand control system configuration mode in Milan Gobi area of the Golmud-Korla Railway. The research results are of great significance to ensure the safe operation of the Golmud-Korla Railway.

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  • 收稿日期:2024-11-10
  • 最后修改日期:2025-01-01
  • 录用日期:2025-01-02
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