5.4.3路基工程施工方案、方法
5.4.3the construction proposal and method of the subgrade project
5.4.3.1路基工程施工方案
5.4.3.1the construction proposal of the subgrade project
1、施工准备
1、construction preparation
各施工段开工之前,首先做好填挖方段的截、排水沟,确保排水顺畅,软土段的路堤段优先进行处理。
Before the construction sections start up, we should work the intercepting drain and barrel drain of the balanced sections well,to make sure the drainage unhindered.The mollisol section will be given priority when we deal with the road embankment
2、地基处理
2、The foundation process
在路基范围内,所有树墩、树根垃圾和其它有机质都必须清除。路床面标高高出地面1m以上区域,树墩、树根垃圾清除至原地面。换填片碎石采取人工配合机械分层摊铺,压路机分层碾压。
In the range of the embankment foundation, all the tree stumps, the roots and other organic substances have to be cleaned.The roadbed elevation should be higher than the ground for 1m. The tree stumps, the roots and other organic substances should be cleaned to the original ground. The gravel padding will be spreaded out stratifiedly by hand fit machines and compactioned stratifiedly by the road roller.
软基处理
The soft foundation process
结合现场实际情况,按照设计文件和施工规范进行施工。施工方案可靠。工序作业规范,施工监测控制有效。
Combining with the paractical situation,carry on the construction according to the design document and the construction standard. Make sure that the construction proposal is reliable, the working procedure works canonically,and the construction monitor goes effectively.
3、路堤填筑
3、The road embankment filling
路基填筑采用机械化施工,自卸车运输,推土机摊铺,平地机整平,重型振动压路机碾压的方法施工,严格按照三阶段、四区段、八流程组织施工。采用挖装机械配备大吨位自卸汽车运土;大功率推土机(对石质填料必须采用320马力以上推土机)摊铺:平地机整平(限于土质路基):50吨以上(自重加激振力)压路机压实:填筑必须采用挂线摊铺、分层压实,层厚控制在30~50cm内(通过试验路段确定);石质填料进场前,必须对超尺寸的石块进行改小处理,最大粒径应控制在规范要求范围以内。
The road embankment filling use the mechanized construction,the self-dumping truck for transportation, the bulldozer for spreading, the land scraper for striking-off, and the heavy vibratory roller for compaction. The construction strictly acts upon the three stages,four sections and eight flow.use the loader machines for earthmoving, providing with large-tonnage dump truck;use the high powered bulldozer(with 320 horse power above for stoney pad) for spreading; use the land scraper for striking off(limited to the soil roadbed); use the road roller for compacting which is over 50 ton (the self weight and the exciting force);the filling must be spreaded with the thread-drawing, and compacted layer by layer,and the thickness of layer must be controled within 30~50cm(determined by the trail pavement section);and before the stoney pad enter the area, make the overdimensioned stones smaller.The maximum particle size should be controlled in the range of the standard requirement.
半挖半填或填挖交界
Cut and fill or sidehill cut commisure
不论是纵向还是横向的填挖交界,都应遵照施工规范和设计图纸要求,开挖错台或铺设土工布,保证相互间的密切衔接。
No matter the lognitudinal or the transversal cut commisure, it should act upon the construction stantard and the design chart,cutting or spreading, making sure the combination closely each other.
4、路堑开挖
4、cutting excavation
根据路堑的长短和土、石方运距的大小,合理选用开挖方法和施工机械。必须坚持自上而下、分层取土的作业顺序,禁止自下而上、掏洞式取土(挖神仙土)的作业方式;路堑边坡必须边开挖边成型,作到边坡自然圆滑;已开挖的区域必须随时保持整洁、清爽。临时排水顺畅;次坚石以上石质路堑边坡必须实施光面爆破技术。
Choose the proper cutting method and construction machines according to the length of the cutting excavation and the haul distance of the earth and sto
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