current position:Home>At the end of the year, Jingxiong Expressway crossed Fangshan Changyang Road, and the pouring beam of "door opening" was constructed without breaking

At the end of the year, Jingxiong Expressway crossed Fangshan Changyang Road, and the pouring beam of "door opening" was constructed without breaking

2021-08-28 03:12:38 Beijing daily client

The project of Beijing section of Jingxiong expressway is progressing steadily , At the end of the year, the cross Changyang Road will be started one after another 、 Construction of important nodes such as Jingliang road and Metro Fangshan line . In order to reduce the impact on traffic , The section crossing Changyang Road is “ doorway ” Upper cast beam , Non breaking construction . Scheme optimization of Metro Fangshan line , The steel box girder is pushed in place at one time , Reduce construction operations above the operating metro line .

Each beam has a QR code that can be traced

The total length of Jingxiong expressway is about 97 km , The Beijing section is about 27 km , The Hebei section is about 70 km . The Beijing section starts from the Fifth Ring Road in the north , Crossing Yongding River to the West 、 Fangshan Metro Line 、 Turn south after Jingshen road , After crossing the Sixth Ring Road, it continues to extend southward to reach the city boundary , It is connected with the design starting point of Hebei section of Jingxiong expressway .

8 month 23 Japan , The reporter saw in the No. 4 work area contracted by China Railway No. 6 Bureau of Beijing section of Beijing xiongsu Expressway , On the piers of high bridges rising from the ground , The construction personnel are cooperating with cranes and other large equipment , Busy with bent cap construction .“ at present , The construction of pile foundation structure has been completed by more than 50% .” Xiao Bo, Secretary of the Party branch of Jingxiong Project Department of Beijing company of China Railway sixth Bureau, introduced , Beijing section of Jingxiong expressway is mainly located in Xiaoqinghe flood diversion area , In order to meet the flood control requirements 、 Realize efficient and intensive utilization of land resources , It is mainly constructed in the form of viaduct , The proportion of bridges along the whole line is as high as 90%.

On the construction site surrounded by Changyang Road , Tall gantry cranes are relaxing “ delivery ” Focus on 110 Tons of box girder , There will be 2274 The box girder is here “ Prefabrication ”, It is directly transported to the Jingxiong Expressway to complete the construction .“ Beam factory innovatively applies hydraulic running template , Instead of traditional block assembly , Not only the production speed of important links is doubled , It also saves a lot of manpower .” Introduction to Xiao Bo . The reporter saw , Each manufactured box girder has a QR code , After scanning the code, you can clearly see the design size 、 Technical indexes such as concrete strength and information of responsible personnel , Every beam can be traced .

“ Be close to ” Construction of Viaduct on high-speed railway line

According to the construction schedule , At the end of this year , Cross Changyang Road 、 The construction of important nodes such as Jingliang road and Metro Fangshan line will be started one after another .

“ Changyang Road is an important traffic trunk line in Fangshan , There is a lot of traffic in rush hours .” Xiao Bo told reporters , If the steel-concrete composite beam in the original scheme is adopted , It is necessary to dispatch large-scale mechanical road closure construction , In order to minimize traffic impact , Finally, the concrete cast-in-situ beam is selected .“ It is equivalent to pouring beams on the door opening support , Under the door opening, you can drive a sports car as usual .” Introduction to Xiao Bo , The fourth work area is close to the center of Changyang Town, Fangshan District , The surrounding business is prosperous , Buildings requiring demolition, reconstruction and protection within the construction scope 、 Power lines 、 Communication lines 、 gas pipeline 、 There are many water supply and drainage pipelines , Heavy workload .

Besides , The whole section of work area IV is constructed in parallel with Beijing Shijiazhuang Passenger Dedicated Line , The nearest distance to the high-speed rail line is only 35 rice , From time to time, we can see the high-speed railway speeding near the construction site . therefore , Ensure the stability of high-speed railway structure during construction 、 Operation safety is also the top priority of the project .

The construction over Fangshan line will not affect the subway operation

Over Metro Fangshan Line Project , It is one of the difficulties of Beijing section of Jingxiong expressway . According to introducing , Metro Fangshan line is close to Jingliang road , In order not to affect the normal operation of Fangshan Line , Ensure construction safety , The construction scheme is also optimized —— The steel box girder will be pushed into place at one time , Shorten the construction time above the subway line .

During the construction process , The walking pusher process will be used , Will weigh up to 3500 Tons of beam body is placed on the walking Jack , Use similar “ Walking , Side bridging ” The way , Push the whole bridge into place smoothly , The maximum span of the bridge 61 rice , The bottom of the bridge beam is only... Away from the rail top of the Metro Fangshan line 7.2 rice . Before pushing , The construction party will be on both sides of the Metro Fangshan line , Isolation piles are used to protect the foundation of Fangshan line , Protective shed shall be used for protection during jacking construction .

The Beijing section of Jingxiong Expressway adopts the standard construction of two-way eight Lane expressway , Standard subgrade width 42 rice , The whole line is equipped with super large bridges 1 seat 、 viaduct 4 paragraph 、 Interchange 5 seat , Main line toll station 1 It's about , Beijing checkpoint 1 It's about , Management center and maintenance work area 1 It's about , Ramp toll station 3 It's about , Parking area 1 It's about , The total investment 122.12 One hundred million yuan .

By 8 month 15 Japan , The overall project of Beijing section of Jingxiong expressway has been completed 35%, The bridge works have been completed in total 8372 Linear meters , Completion percentage 35%, Including pile foundation 、 Cushion cap 、 Pier column 、 The bent cap has been completed more than half ; Subgrade filling is completed 43 Wan Fang , Completion percentage 27%. All the work is progressing steadily according to the construction plan , Will be in 2022 year 12 month 31 It will be opened to traffic every day .

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