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How to make the filling quota of subgrade A and B materials?
The construction mileage of our work area is (DK147+798.505-DK156+081.5) (including short chain of 447.006m, including subgrade, bridge and culvert, other production equipment and buildings, temporary works, auxiliary works and interface works before and after the reserved station, etc.). Among them, the subgrade is about 4.68 1km long, all of which are special subgrade, and the foundation is treated with prestressed pipe pile, CFG pile, gravel grouting pile, pile top raft, bearing platform and geogrid. The subgrade bed surface is graded crushed stone with a thickness of 0.4m, and the bottom of subgrade bed is filled with 2.3m thick group A and B fillers. According to the design instructions and the actual construction progress of our unit, DK149+900.4 ~ DK150+001.2 is selected as the filling test section of subgrade A and B, with a total length of100.8m..

Second, the compilation basis:

2. 1 Shanghai-Nanjing rail transit construction drawing of newly-built railway: Shanghai-Nanjing intercity map 5 (road);

2.2 Detailed design drawing of Shanghai-Nanjing intercity rail transit subgrade;

2.3 Overview of subgrade construction drawing design of Shanghai-Nanjing intercity rail transit;

2.4 Technical Guide for Construction of Railway Subgrade Engineering of Passenger Dedicated Line;

2.5 Interim Standard for Acceptance of Construction Quality of Railway Subgrade Engineering of Passenger Dedicated Line;

2.6 Technical Guide for Subgrade Engineering Construction of Slag-free Track Railway for Passenger Dedicated Line;

2.7 Provisional Standard for Construction Quality Acceptance of Slag-free Track Railway Engineering for Passenger Dedicated Line.

Three. Test items and purposes of the test part:

1, test purpose

Through experimental research, the main objectives are: to select suitable supporting machinery and equipment; Determine scientific and reasonable technical parameters (loose laying thickness, rolling times, rolling speed), on-site quality control measures, and put forward inspection reports.