Autumn in October，Good news kept coming。Dongguan Rail Transit Line 1 Phase I Project Guangsong Section Double Track、yuanshan Station of Shenzhen Rail Transit Line 16-The left line of Longxing Station runs through smoothly，Three shield machines of China Railway Construction Heavy Industry Co., Ltd., which participated in the construction, left the tunnel at the same time.，Help the construction of rail transit in South China。

Dongguan Rail Transit Line 1 Phase I Project Guangsong Section Double-track Connection

Recently，Jointly built by China Railway Construction Heavy Industry and China Railway 14th Bureau“Guanlong 6”“Guanlong No.7”Earth Pressure Balance Shield Machine Helps Dongguan Rail Transit Line 1 Phase I Project（East Medical University Station）Loose（Shanhu station）Interval double-track through。At this point，The three sections of the bid section are all smoothly connected.，It has laid a solid foundation for the opening of the whole line on schedule.。

The section runs through the site

The left shield section of Guangsong section is 832 meters long.，The shield section of the right line is 825 meters long.，Section underpass urban expressway，The flow of people and vehicles is large，The layout of underground pipelines is intricate，110kVPower line、Rainwater box culvert, etc. across the tunnel，At the same time, there are many bedrock protuberances in the tunnel body.，The construction is difficult。

In order to adapt to the complex geology and surrounding environment of the interval，China Railway Construction Heavy Industry and China Railway 14th Bureau have carried out a series of targeted designs for the shield machine.，Uch as a reinforced cutterhead、High performance main drive system、High-precision soil body pressure balance control system、High-pressure-bearing main drive seal system、Multi-level grouting system, etc.，The geological adaptability of the shield machine is greatly improved.。At the same time，To improve the working environment of the tunnel，Meet the needs of humanization，The shield machine is also equipped with a tunnel ventilation and refrigeration system.。

The equipment is offline

Supported by the high performance design of shield machine，Carefully organized and coordinated by the construction team、Optimize construction technology，“Guanlong 6”Obtain the highest excavation of 20 rings in a single day（30 meters），Maximum digging 256 rings in a single month（384 meters）Excellent construction results，It has created a new record of shield tunneling for Dongguan Rail Transit Line 1.，Just 80 days.，Complete nearly 900 meters of interval double-track on the same day、“Zero tool change”Through。

 

yuanshan Station of Shenzhen Rail Transit Line 16-The left line of Longxing Station runs through

Recently，Jointly built by China Railway Construction Heavy Industry and China Railway 14th Bureau“Xing'an No.1”Cutter head of EPB shield machine breaks through the soil，It marks yuanshan Station of Shenzhen Urban Rail Transit Line 16.-The left line of Longxing Station runs through smoothly。

yuanshan Station of Shenzhen Rail Transit Line 16-The left line of Longxing Station runs through the site.

The total length of Shenzhen Rail Transit Line 16 Phase II Project is 9.46 kilometers。Long Xing-The length of the left line between yuanshan District is 1060.8 meters，The section mainly passes through silty clay、Gravelly cohesive soil、Earthy/Blocky highly weathered sandstone、Slightly weathered marble；Interval karst development，The tunnel body partially passes through karst caves and soft and hard uneven strata.。Long Xing-The geological condition of the left line between the mountains is very easy to cause the shield machine to deviate.、Card machine、Land subsidence、Segment damage, cutter head damage, etc.。

To overcome the above difficulties,，Railway Construction Heavy Industry and China Railway 14th Bureau have carried out targeted design for the equipment.，Through the use of a six-spoke heavy-duty cutterhead，Ensure the structural strength and rigidity of the cutter head，Improve its adaptability to soft and hard uneven strata.，At the same time, the design of knife spacing is adopted.，Improve the rock breaking capacity of the cutter head。

“Xing'an No.1”The shield machine is offline

The second phase of Shenzhen Urban Rail Transit Line 16 is a key rail transit project in Guangdong-Hong Kong-Macao Greater Bay Area.，It is the rail trunk line to realize the southern expansion of the Universiade New Town in Longgang Central City.。After the completion of the project，It will accelerate the flow of resources in the Bay Area.、Efficient configuration，Promoting the Integration and High Quality Development of the Bay Area。