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Where is the construction of the iron -related interval?

● Xiamen Metro Line 6 Jimei to Tongan section's iron -related range is 1.52 kilometers in length. There are Fuxia high -speed rail (under construction), Hangzhou -Shenzhen Railway (camp), etc. The iron -related interval must be rushed to the Fuxia high -speed rail to enter the joint test stage. Complete the cross before

● In order to ensure safety, when the railway under the iron -related interval tunnel, a number of guarantee measures such as "pre -isolation of bridge piles, reinforcement of soil body reinforcement after digging, first trial section of the test section" are planned to minimize the impact of construction to the lowest

▲ Yesterday, the "Success" shield machine from the Metro Line 6 Jimei to the Tongan section was successfully launched. (Photo by Xiamen Daily reporter Wang Xieyun)

Yesterday morning, at a construction site located in Yaotou Village, Xianghe Street, Tong'an District, Xiamen Metro Line 6 Jimei to the first shield machine in Tong'an section was launched. This section of the iron -related interval officially entered the shield excavation construction stage.

At 10 o'clock yesterday, the construction site of the wind well was issued with the starting order. With the roar of the rumbling, the shield machine of the left -line shield machine slowly rotated, and the shield machine moved forward.

Line 6 integrates 1.52 kilometers in the same section of the same section, starting from Yaotou Village, Xianghe Street, Tong'an District. Camp) Wait. "The iron -related interval must be rushed to complete the cross before entering the joint testing stage of the Fuxia high -speed rail, facing the dual pressure on the construction period and technical level." Zhu Guozheng, the project manager of the Ironomes No. 6 of Xiamen Rail Group Metro Line 6 Ensuring safety, when the railway under the iron -related interval tunnel, Xiamen Rail Group planned a number of guarantees such as "pre -isolation of bridge piles, reinforcement of soil body reinforcement after digging, and test section first".

According to reports, "bridge pile pre -isolation" is a quarantine pile on both sides of the shield tunnel, which plays a role in isolation and protection of the Fuxia high -speed rail bridge pile, reducing the degree and scope of the shield construction on the surrounding soil disturbance, and reduced the impact of construction to the impact lowest.

After wearing the Fuxia high -speed rail under the shield, it is facing the Hangzhou -Shenzhen Railway and the Shenhai Expressway, but neither the roads cannot be set up. "According to estimates, the minimum net distance between the shield machine and the Hangzhou -Shenzhen Railway Bridge pile foundation is only 6.2 meters." Zhu Guozhen introduced that at that time, the "After -digging soil reinforcement" method will be used , Put a second grouting one month later. On the one hand, this method reduces the impact of the shield digging into the railway bridge piles and ensure the zero sedimentation of the railway bridge piles; on the other hand, it is also filled with pressure to enhance the stability of the shield structure.

During the shield construction process, the first 100 meters are used as the test section, and the excavation parameters are optimized simultaneously, and the railway is across the railway with the best control state to reduce risk.

It is understood that the shield tube of the iron -related interval uses a 1.5 -meter ring width, which is a 20%loop seam number width from the previous 1.2 meter ring width. , Improve construction speed.

The right shield machine is expected to start one and a half months.

(Xiamen Daily reporter Lin Qin Sheng intern Chen Luqing Correspondent Zhu Junbo)

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