市政公用工程管理与实务（Management and practice of municipal public works）.docVIP

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市政公用工程管理与实务（Management and practice of municipal public works）.doc

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市政公用工程管理与实务（Management and practice of municipal public works） Management and practice of municipal public works 1. what does the road subgrade project include? What forms of construction are used? A: subgrade works include subgrade (soil) itself and related soil (stone) side, along the small bridges and culverts, retaining walls, shoulder, slope, drainage pipe and other projects. The construction of subgrade is mostly done by manual and mechanical construction. 2. what are the procedures for subgrade construction? Answer: (1) preparation; (2) construction of small structures and buried underground pipelines; (3) subgrade (soil, stonework) works; (4) quality inspection and acceptance. 3. what are the principles that must be followed in the construction of roads and underground pipelines? Answer: underground pipelines must follow the principle of first underground, back ground, first deep, back shallow. 4. what are the contents of subgrade (soil, rock) engineering? Answer: measuring pile number and elevation, excavation cutting, filling embankment, leveling subgrade, compacting subgrade, trimming shoulder, building protective works, etc.. 5. how to construct soil subgrade? What requirements should be achieved? Answer: must according to the roadbed design plane, the cross section position, the elevation and so on the geometry size carries on the construction, and guarantees the roadbed the strength and the stability. 6. what does subgrade construction survey include? Answer: 1. restore midline measurement; 2. nail line outside pile; 3. measuring elevation. 7. what is the filling (square) subgrade? Brief description of construction points. Answer: when the original ground elevation is lower than the design elevation, filling earthwork is necessary. (1) filling shall not use garbage soil, humus soil, silt, frozen earth and saline soil. Fill the ground shall not contain grass, roots and other debris. (2) exclude the water in the original area, remove roots, weeds, mud an