軟土路基外文翻譯--論公路路基施工技術(shù)-公路隧道(參考版)
2025-05-16 15:45本頁面
【正文】 ② reinforced concrete cantilever retaining wall structure, wall bulkhead and retaining the slabcolumn by reasonable force, small masonry walls, has also been widely used in highway embankment protection。 Stamping should pay attention to the continuity of the tracks, especially at the Uturn, do not affect the reserved space with the paction effect. ② dynamic paction of construction: also known as dynamic consolidation method is used to 8t ~ 40t crane lifting hammer to 6m ~ 25m height, free fall, to the foundation with a strong impact energy of tamping, so that shock waves appear in the soil and the impact of stress, forcing pressed soil porosity, soil partial liquefaction, resulting in tamping points around the crack, forming a good drainage channel, pore water and gas escape, so that soil particles rearrange, paction achieved by the time of consolidation, which improve the bearing capacity, reduce the pression of an effective foundation reinforcement methods. 3 subgrade drainage Subgrade strength and influence of water is an important factor in stability, water erosion can cause many diseases of the roadbed. Meanwhile, from the local environmental protection and water conservancy facilities, without prejudice to consideration, must be prepared subgrade drainage, the formation of drainage systems, and coordination with regional drainage plan to prevent flooding due to various causes, to the embankment, causing unnecessary road construction the loss. Highway drainage include two aspects: First, underground drainage, a reduction of groundwater, farmland irrigation discharge stability and strength of the impact of the roadbed。 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。 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 consol
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