Construction organization design of railway subgrade/

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1.1 Preparation Basis 1 Construction Drawing of Subgrade Works of Bid Section 13 of Additional Second Line of Xuanhang Railway. 2. Current construction technical specifications, standards and regulations of the State and the Ministry of Railways. 3. Actual survey data of the construction site.

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The XX Badong (boundary between Hubei and Chongqing) Expressway in Hubei Province is the western section of the "Shanghai Chengdu" Expressway in Hubei Province, one of the 18 east-west horizontal lines in the National Highway Network Plan (7919 network), and also the western section of the "horizontal third" in the "six vertical, five horizontal and one ring roads" in the framework highway network plan of Hubei Province. The completion of the project plays an extremely important role in the implementation of the economic development strategy from east to west, from south to north, and from inland economy to outward economy in China's economic construction, and plays a practical role in promoting the early formation of the skeleton highway network in Hubei Province and bringing the network effect into play as soon as possible. The completion of the project can greatly improve the transportation links between XX urban area and Wuhan, the provincial capital, and remote mountainous areas, which will help alleviate poverty and promote the economic development of the project area. Its construction has a very important practical significance for accelerating the development of China's west, narrowing the gap between the east and the west, and maintaining the sustainable, stable and coordinated development of the national economy. The main technical standards of this project are: highway grade: four lane fully enclosed expressway Standard terrain type: hilly calculated driving speed: 80 km/h Lane width: 2-2 × 3.75 m Subgrade width: 24.5 m integral subgrade width; The median is 2.0m, the separated subgrade is 12.25m wide, and the bridge is the same width as the subgrade. Contract section X of Yichang Bazhong Expressway starts at XX Spring, XX Town, XX District, XX City and ends at XX Village, XX Street Office, XX District, XX City, with a total length of 7.68 kilometers. The starting and ending stake numbers of the construction route of this sub project are: K15+570~K15+746.5, 176.50 meters long. K16+023.5~K16+336, It is 312.5 meters long. The sub divisional subgrade is 489m long.

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In the earthwork allocation scheme of the project, the soil source of the test section is the subgrade excavation of K162+820~K163+040 section. After sampling the fill soil, the tests such as particle screening, soil liquid, plastic limit, free expansion rate, standard compaction, etc. are carried out to identify the soil category and determine the relevant indicators to guide the site construction. According to the sampling test, the soil source is Group B filler.

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Overview of Zhejiang Jiangxi Railway Electrification Speed Increase Reconstruction Project (Zhejiang Section) The relevant units of the eighth contract section are as follows: the construction unit: the construction headquarters of Shanghai Railway Bureau for the electrification and speed increase reconstruction of Zhejiang Jiangxi Railway; the design unit: the Second Survey and Design Institute of the Ministry of Railways; the supervision unit: the Construction Supervision Technology Company of Shanghai Railway Institute; the construction unit: China Railway Fourth Bureau Group Co., Ltd. The starting and ending mileage of this section is K141+000 ～ K174+000, with a total length of 33km. There are four stations in the section, After reconstruction, 3 stations will be reserved and 1 station will be closed. There are 15 double line bypass sections in this section, all of which are new lines. The subgrade standard after reconstruction is high (the opening speed is up to 200km/h), and the curve radius is large, which meets the requirements of speed increase of the line. The main projects of speed increase and reconstruction are: subgrade widening, new subgrade in bypass section, new bridges and culverts and reconstruction, new track laying, switch changing, line shifting, and some station buildings, signal, communication, power and other related supporting works.

Topic: Construction Scheme for Subgrade Filling of High speed Railway Complete scheme of construction organization design Complete construction organization design
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Topic: Construction Scheme for Subgrade Filling of High speed Railway Construction organization design of railway subgrade works Standardized construction organization design of railway subgrade
Construction Organization of Subgrade Filling Test Section of Xi'an-Chengdu High speed Railway Design programme
Working principle: the settlement floor buried on the ground will sink with the foundation settlement, and its elevation is measured through the transmission of the measuring rod connected above. The elevation of the measuring rod minus the length of the rod is the elevation of the settlement plate, and each settlement difference is the surface settlement value

Topic: Construction Scheme for Subgrade Filling of High speed Railway Construction organization design of railway subgrade works Standardized construction organization design of railway subgrade
Special construction scheme for a railway subgrade test section
******The unit project starts from Changyu Island to the middle sea area of ****** CX23 # pier (not included) and ends at the XD18 # pier on the island of Dalian Island. The starting and ending mileage is DK67+465.75 (not included)~DK70+564.700, and the section is 3.099 km long. It includes ******, deep water high pier area bridge, shallow water and land high pier area approach bridge, and land low pier area approach bridge****** See Figure 1.1-1 for bridge span layout.

Topic: Special construction scheme for subgrade test section Special construction scheme for railway subgrade blasting Test section of subgrade works