軟土路基外文翻譯--論公路路基施工技術(shù)-公路隧道(編輯修改稿)
2025-06-25 15:45 本頁(yè)面
【文章內(nèi)容簡(jiǎn)介】 ddition, it increased the degree of paction of the embankment base of not less than 93% of the requirement. With the rapid development of highway roadbed construction technology has also made considerable progress, for special subgrade treatment technology has bee mature and improve. (1) wet areas embankment filling pressure. Through wet soil filling the foundation is relatively simple, monly used to fill gravel cushion and processing shop geogrid method is simple, the treatment effect is better. However, paction of subgrade is very difficult to regulate a number of adjustments to this: First, the standard paction test data can be determined according to or lower than the tabulated value of 23 percentage points。 the second is for the natural consistency of less than , liquid limit greater than 40, plasticity index greater than 18 of the clayey soil, for the next roadbed and under the embankment, the light can be specified paction standards。 third is to improve the nature of filler, mixed with lime in the soil, can usually get the desired results, but also a new absorbent material can be reinforced. (2) loess subgrade paction. And pared to other road subgrade clay, loess are particularly vulnerable to violations of water, is a special kind of clay. Loess roadbed will often be divided into two categories: nonloess and loess. Among them, the loess mainly in central and western regions, as embankment material, due to water soaked, their structure is rapidly destroyed, should reduce the intensity, improper construction will occur if large subsidence, causing embankment instability, especially high embankment filling the lot is a series of projects will lead to disease. Therefore, the loess subgrade paction should be reasonable based on the actual situation of the different options. ① impact paction: impact paction process is the foundation of the principle that a certain impact energy of water diffusion in soil consolidation and paction of soil paction to achieve the purpose of soil reinforcement. Impact paction technique is only suitable for shallow and marshy nature of collapsible loess foundation treatment, and its effective impact on the depth of not more than 80cm, punch a few times to 30 times or so. In the stamping process of construction should be noted: to maintain the optimum moisture content。 by impact pactor models limit the length of the embankment by the general press of not less than 120m, width of not less than 15m。 before pressing each layer should be punching along the edge of the first five times around the base to reduce the impact energy in the process of stamping 8 the lateral pression of the embankment。 with the impact of edge of embankment paction pressure of realtime machine speed should be slower, or may cause the body slid off the embankment。 Stamping should pay attention to th
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