Project overview
A-B (Huang Wei) expressway is a C-D highway in the national key highway planning. At the same time, it is also an important part of the "west vertical" (that is, Bozhou-Fuyang-A-Anqing-Dongzhi highway) in the main skeleton planning of Anhui Province. It starts from Fuyang to A Expressway and ends at B (Huang Wei) to Qianshan Expressway, with a total length of 72.287 kilometers.
A-B (Huang Wei) expressway adopts mountainous and hilly expressway, the starting point K0+000 to K36+820 is 100 km/h, and the subgrade width is 26 meters; K36+820 to K72+200, subgrade width 24.5m, speed 80km/h .. The whole line is divided into 10 contract section.
This contract section is the eighth contract section, with the starting and ending pile numbers of YK59+340 (ZK59+300) ~ YK63+830 (ZK63+810), and the total length of the contract section is 4.49 kilometers.
Local natural conditions
1, topography, landforms and geological conditions
The line along this contract section belongs to Dabie Mountain area, with steep terrain and severe ups and downs. The terrain of this section of the route is complex and diverse, which can be roughly divided into Jianghuai hilly area and mountainous hilly area. From the point of morphological origin, this bid section belongs to folded and denuded Zhongshan, which is composed of medium-deep metamorphic rocks from Upper Archean to Proterozoic. Obviously controlled by the structure, folds and faults are developed, hills overlap, ravines are criss-crossed, peaks are pointed or pointed, ridges are narrow, canyons are common, and bedrock at the bottom is exposed. The vegetation along the line is mainly rice, and most areas are woodland.
2. Meteorological and hydrological conditions
The project area is located in the humid monsoon climate zone in the north subtropical zone, with the climatic characteristics of obvious monsoon, distinct four seasons, mild climate, abundant rainfall, abundant sunshine and long frost-free period. However, due to the frequent activities and confrontation of cold and warm air masses, the terrain is complex and diverse, and natural disasters such as drought, waterlogging, wind and hail often occur. The regional annual average temperature 14.5 ~ 16℃,1~ March and 65438+February are relatively low, with the monthly average temperature 1.5 ~ 3.9℃ and the lowest temperature-17.4℃. The highest temperature is from June to August, the average temperature is above 24℃, and the highest temperature is 43.3℃. The frost-free period in the project area is 2 1 1 ~ 254 days. The annual average precipitation1153.6 ~1450 mm, and the precipitation in four seasons decreases in summer, spring, autumn and winter. Meiyu period is generally from late June to mid-July.
The area along the line belongs to the Huaihe River system. The main surface water bodies are Mozitan Reservoir and Taiyang River. Flood disasters in this area mostly occur in rainy season, and water resources are relatively poor. The main groundwater includes loose rock pore water, bedrock fissure water and red bed pore fissure water, and all kinds of groundwater are basically non-corrosive to concrete.
3. Traffic, communication, water and electricity conditions
There is a county road X069 on one side of the line in this bid section, and the line in this bid section is staggered and parallel to the county road X069. Construction roads can make full use of X069 County Road.
The wireless communication signal of the project location is good, and there are telephone lines passing along the county road X069, which is convenient for communication.
This bid section is located near Mozitan Reservoir, with convenient construction water.
There are many 10KV and 35KV high-voltage electricity near this bid section, which can meet the construction electricity demand of each worksite.
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