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Bao'e MC 86 slotting machine overcomes difficulties and operates steadily, and the diaphragm wall of Ma'anshan Park Station of Guanghua Intercity Railway has been successfully completed

January 04, 2024

End of 2023,Guangzhou East-Huadu Tiangui Intercity Railway Project contracted by Guangzhou Construction Co., Ltd.(Short name“Guanghua intercity railway”)Enclosure of Diaphragm Wall Enclosure Structure Works of Ma'anshan Park Station in Work Area 8。Guanghua intercity railway,The line starts from Guangzhou East Station of Guangzhou Metro Line 18.,Go north via Jingxi Road、Baiyun Dongping、Baiyun City Center,Connect the square stone、Fenghuang South Road、Ma'anshan Park,Stop at Huadu Huacheng Street Station,7 new stations,The line is 39 long.Six kilometers,The design speed is 160 kilometers per hour。As the inter-city network of Guangzhou metropolitan area and the north-south rail transit artery of Guangdong-Hong Kong-Macao Greater Bay Area,,After the completion of the project,It will be connected in series with the future Nanzhuzhong Intercity through Guangzhou Metro Line 18.,It will greatly shorten the communication between the north and south of Guangzhou.、And cross-city to Zhuhai、Space-time distance of Zhongshan。

Ma On Shan Park Station is 265 meters long.、Width 24.5 meters,Excavation depth of foundation pit 26.9~28.8 meters。The underground continuous wall as the enclosure structure is divided into 144 groove sections.,Wall thickness 1m,Wall depth 29.0~34.7 meters,Adopt double-wheel milling sleeve milling joint type;In addition, there are 7 plain walls at the north end.,5 walls of No.1 and No.2 shafts in work area VII,156 walls in total。The diaphragm wall is completed by Guangzhou Yuesheng Construction Industrial Co., Ltd. and Guangdong Zhengmao Science and Technology Engineering Co., Ltd.。

Total quantities of underground diaphragm wall are about 16,900 cubic meters,The total quantities of soil layer and sand layer are about 9,600 cubic meters、Moderately weathered rock about 7,000 cubic meters(Maximum rock strength 64.4 MPa)、About 300 cubic meters of slightly weathered rock(Maximum rock strength 134.6 MPa),Rock works account for 43% of the total works of diaphragm wall.2%,The rock part is adopted“Drilling and milling”Carry out construction in combination with process。Transfer between Maanshan Park Station and the existing Guangzhou Metro Line 9,Karst cave exposed in the site(Hole-seeing rate 12.7%),Thick sand layer(Maximum thickness is 16.3 meters),Horizontal displacement out of limit、Land subsidence、Collapse and other risks。

Guangdong Zhengmao Company has invested a Bao'e in this project.MC 86 slotting machine,According to the arrangement of the Project Department,The construction will be carried out in two stages.(Thirteen walls have been completed by other companies in the early stage.)。The first phase is from 1 March to 27 June 2023.(Among,Work was suspended for 14 days in March due to the project schedule.),No construction at night,A total of 49 walls were completed;The second phase is from 8 September 2023 to 2 January 2024,Bao'eMC The 86 slot Milling Machine operates almost 24 hours a day.,A total of 98 walls were completed,In the last four months.,MC The 86 slot Milling Machine always runs stably,Complete an average of 24 walls per month。

MC 86 Advanced cabin design and layout makes the whole equipment less noisy.,It provides favorable conditions for night construction.;Under complex working conditionsMC The construction energy consumption level of 86 slot Milling Machine is relatively low.,According to the user's record,The overall average fuel consumption of the project is only 52 litres./Hours or so,At 43.2%On the premise of high proportion of rock,The average fuel cost of double-wheel milling is less than 90 yuan per cubic meter of output.,MC Efficient construction capacity of 86 slot milling machine、Lower fuel consumption and stable production output,And that cost is bet controlled for the integral construction of the underground continuous wall.。

After the careful deployment of the project department of Guangzhou Construction Co., Ltd., the general conTractor,,Guangzhou Yuesheng Construction Industry Co., Ltd. and Guangdong Zhengmao Science and Technology Engineering Co., Ltd.,The continuous wall enclosure structure project of Ma'anshan Park Station in the eighth work area was finally completed 5 days ahead of schedule.,For subsequent excavation of foundation pit、The smooth development of other projects such as the construction of the station has laid a solid foundation.。

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