墨尔本Suburban Rail Loop项目的两处关键施工现场——Clarinda和Heatherton——发现石棉和污染土壤，引发施工延误并加剧了承包商与项目管理部门之间关于成本超支的分歧1。这条从Cheltenham延伸至Box Hill的地下铁路线项目目前面临重大决策时刻，维州政府正评估是否应暂停、取消或修改该项目1。
项目成本已大幅增长1。该工程的初始预算为22亿澳元，到2021-22年度预算增加1.59亿澳元，截至2025年已攀升至25亿澳元1。维州首席审计官于2025年披露了这一实际成本数字1。此外，2021年对第一阶段的估计成本曾达345亿澳元，随后建筑成本上升了20%1。
技术方面，隧道掘进机预计在八周内开始在Burwood地点进行挖掘作业1。议会预算办公室的分析表明，取消该项目可在2030年前改善州预算状况58亿澳元，十年期间可改善210亿澳元，但相应的合同终止成本将达18亿澳元1。维州总理Ben Carroll表示，政府将投资在"为维多利亚人提供最大价值"的地方1。
Victoria's Suburban Rail Loop project faces mounting complications after asbestos and contaminated soil were discovered at two critical construction sites in Clarinda and Heatherton.1 The underground rail line, designed to connect Cheltenham to Box Hill, has become the subject of intense scrutiny regarding cost overruns and project viability.1
The project's financial trajectory has deteriorated significantly. Initial early engineering costs were estimated at AUD 2.2 billion, but the budget expanded by AUD 159 million in 2021-22, with the current cost now standing at AUD 2.5 billion as of 2025.1 The first phase was initially estimated to cost AUD 34.5 billion in 2021, before construction costs rose by 20 percent.1 These figures have prompted serious debate between contractors and project management over financial responsibility for the escalating expenses.
Policy decisions loom as Victoria's government weighs its options. According to a parliamentary budget office report, cancelling the project would improve the state's budget position by AUD 5.8 billion through 2030 and AUD 21 billion over a ten-year period, though terminating existing contracts would cost AUD 1.8 billion.1 Meanwhile, tunnel boring equipment is expected to commence excavation at Burwood within eight weeks.1 Premier Ben Carroll has stated the government will direct investment toward areas that deliver "the greatest value for Victorians."1
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