| dc.description.abstract | The road engineering is an important public works for our country, its construction quality is closely linked with the livelihood of the people, in recent years, the civil engineering technology developed very fast, the path Controlling organization scheduled the correlation technique standard, promoted technologies and so on road engineering plan, design and construction work. Regardless of being newly built, the renovation or expands the road engineering, may by path’’s structure, the labor law, and each kind of new paving material research and development, chooses the best pavement design, and in by way of the construction quality control, the result appraisal which and finishes, may provide the user smoothly, comfortable, the smooth of pavement. But because the livelihood of the people pipeline unit the service demand carries on projects and so on pipeline embedment, service, migration, carries on the excavation to lay down the pipeline facility, because has not followed the standard to carry on the backfill work truly, presses the density to be unable to achieve the standard to stipulate, forms the backfill not solid path to undercut, or the hole of pipeline installs underground improper, causes the road surface to be uneven, reduces the service level of pavement original design.
This research mainly aims at the manhole peripheral material behavioral analysis, uses three dimensional finite element software Solidworks, establishes the manhole installment and pavement structure system, considered the axial load, receives the different manhole peripheral material width, the different vehicle speed and the different tyre size influence, to simulate structure system of dynamic load under each kind of condition, seeks the best width of manhole peripheral material, reduces the influence of manhole to the pavement.
The research discovered that between four different widths has the distinct tendency, the stress distribution is d40>d30>d20>d10, when manhole peripheral width broaden, the material receives the level stress and the vertical stress all has increases the tendency, when the width at 10cm, the peripheral material receives the stress value under the same axial load is the smallest, therefore the 10cm width should be the manhole peripheral material most ideal width. In addition, the tensile and compressive strains of peripheral material all occurs in the bottom layer boundary, represents the material destruction will start from the bottom layer, therefore when embedment installment, should reinforce the backfill and the compaction of the bottom layer.
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