Abstract
Based on the investigation of the comprehensive utilization technology of tunnel slag in expressway, the author finds that combining with the characteristics of the project, planning scientific management content, formulating reasonable utilization principles, and implementing the measures and control of the tunnel slag gravel yard and the waste slag yard can improve the recycling utilization rate of tunnel slag, reduce the amount of tunnel slag waste, reduce the land occupation and damage the ecological environment.
Highlights
The excavation of tunnels in highway construction in mountainous areas will produce a lot of waste tunnel slag, which will cause ecological damage and soil erosion
In order to solve the problem of tunnel slag, the current practice is to strengthen the classification, processing and use management of tunnel slag, improve the recycling rate of tunnel slag, reduce the volume of tunnel slag, so as to reduce the occupation of land and damage the ecological environment
Based on the investigation results of the comprehensive utilization technology of tunnel slag in expressway, the author finds that the comprehensive utilization effect of tunnel slag can be achieved by formulating the principles of tunnel slag utilization and implementing the management and control measures of "two fields" of tunnel slag macadam field and waste slag field through the "three stages" of planning design, bidding and construction, which has certain guiding and promotion significance
Summary
The excavation of tunnels in highway construction in mountainous areas will produce a lot of waste tunnel slag, which will cause ecological damage and soil erosion. 2.2 Bidding stage management procedure (1) In combination with the division of civil construction sections, binding bidding is adopted to bind subgrade or pavement works with long and large tunnel works.In the process of construction drawing budget preparation, for the project involving the utilization of tunnel slag, the unit price of the project considers the full and reasonable utilization of tunnel slag and reduces the cost. (3) According to the design documents, the construction unit shall formulate a detailed scheme for the utilization of tunnel slag, and make reasonable adjustment in the implementation process in combination with the dynamic change of tunnel surrounding rock and the actual construction progress of subgrade, bridge and culvert works. The gravel, machinemade sand and stone powder produced by the tunnel slag processing shall meet the relevant parameter requirements of relevant design and technical specifications and standards when applied to the construction
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