The new section of the new section of the Qinglan Expressway from the County to the Jinjinjie section is completed

On June 30, the tense construction lapped for 24 months, the Qinglan Expressway involved in the reconstruction and expansion project of the county to the Jijin boundary section (hereinafter referred to as the Qinglan Expressway Reconstruction and Expansion Project) was completed and opened to traffic. The vehicle has been changed from the existing high -speed 2 lanes to this 3 lanes. The road width, flat, and Jingmei, and tried to provide Si Cheng with a comfortable, unobstructed, safe, and beautiful travel experience. Important significance and role.

The Qinglan Expressway is the sixth horizontal line of east -west horizontal lines of the National Highway Network. It is a high -speed transportation channel that runs through the east, central and western regions of my country's east, middle, and western regions, and connects the economic artery of the inland and the coast. In December 2004, the Qinglan Expressway was completed and opened to traffic from the county to the Jijin boundary section. In recent years, with the completion of the two -way six -lane and the two -way seven -lane of the Shanxi section in Handan section, the two -way four -lane section has become the "bottleneck" of the Qinglan Grand Channel. It is urgent to change and expand.

The Qinglan Expressway Reconstruction and Expansion Project is located in the eastern foot of Taihang Shanshan. Handan -Xixian County is the first highway in the first mountain area of ​​Hebei Province. The innovation adopts a new model of "4+3" seven -lane and separated roadbed construction model Essence Among them, "3" refers to a newly separated three -lane highway in the direction of Changzhi from Changzhi. The design speed is 80 kilometers/h, the line is 13.792 kilometers long, the roadbed width is 16.5 meters. The "4" is the one -way driving of Handan to Changzhi's direction.

The project is included in the "Thirteenth Five -Year Plan" development plan of the Ministry of Transport and the comprehensive transportation development plan of the "Thirteenth Five -Year Plan" of Hebei Province. It is a key project that the country and Hebei Province requires to accelerate the implementation. Jijin and Lu's traffic artery is smooth.

The new section of the Qinglan Expressway Reconstruction and Expansion Project Crossing Humanities and Natural Scenic Spots, such as Hanwangshan, Wuzhishan, Taihang Red River Valley, Qingzhang River National Wetland Park, and the protective land protection area of ​​Yuecheng Reservoir. The gully is steep, commonly known as the "chicken feet ditch" terrain.

There are 1 special bridge, 4 bridges, and 4 constructors across the new section, with a total of 50 constructors. The earth and stone are excavated 1.12 million cubic meters.

Among them, the Qingzhang River Special Bridge with a total length of 2697 meters is a key control project of the project, across the Qingzhang River in the main river in Xinxian County. The construction of the bridge mainly exists: deep -founded pit and high pier, and is in the rocks. Strata, the maximum diameter of pebbles is 150cm, 47 empty -hearted thin wall pier, average height of 42 meters, up to 53 meters, and the construction is extremely difficult.

In order to ensure the successful implementation of the project, the Qinglan Expression and Expansion Project Headquarters organized construction units and design units for multiple field surveys, and invited experts to demonstrate. Finally, the construction plan for the "introduction of holes+steel plate piles" was determined. The problem of excavation of the pit for the first application is the first application of North China.同时，针对桥梁薄壁墩数量多且高的问题，在总结滑模施工和爬模施工经验的基础上，创新应用“悬挑式木工字梁模板”施工技术，有效降低模板自身重量，轻巧、 High -efficiency and safety. Each climbing can shorten for 2 days, which is the first large -scale application of highway construction in Hebei Province.

Xiangtangpu No. 2 Bridge, across the existing Qinglan High Speed ​​and 309 National Highway, the flat curve is S-shaped, the longitudinal slope is 1.42%, the main span is 62 meters, and the upper part uses 142 meters steel-mixed combination box beam + 4-hole 40 meters prestressed stress The T -beam structure, of which the main body weighs 1221 tons of steel box beams. During the laying process, the construction uses the "step -by -push push" laying process, which realizes the continuous construction of high -speed existing high speeds. During the push period, the use of the "Gaode Smart cone barrel safety early warning system" was introduced to achieve active early warning of hidden safety hazards, which guaranteed the safety of existing high -speed driving safety and safety of construction operators. It is reported that Xiangtangpu Bridge No. 2 Bridge is a large span, large tonnage, and flat vertical curve. The difficulty of construction has set a record of similar construction in Hebei Province.

It is reported that the total investment of Qinglan high -speed reconstruction and expansion projects was 1.621 billion yuan, which has completed 1.3 billion yuan so far, accounting for about 80%of the total investment. In the next step, the Qinglan High Speed ​​and Expansion Project Headquarters and the participating units will concentrate on the implementation of existing highways. It is expected to be completed by the end of June next year.

Source: Shijiazhuang Daily Client

Reporter: Ma Dong

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