-
-
-
-
Contact
San San Industry (I) in Hangzhou
Release time:
2019-08-28
"The sea is flowing, and the hero's true qualities are shown." The Sansan Industrial Shield Machine broke the construction problem and successfully tunnelled, which bought precious time for the completion of Hangzhou Metro Line 5 on schedule, and once again proved that it is a well-deserved "complex geological excavation". King ".
Yes, it is Hangzhou. News has just come: SanSan Industrial Shield Machine has created the myth of directly crushing 150MPa boulders in soft soil strata!
Hangzhou Metro Line 5 spans Xiaoshan District and Yuhang District, with a total length of nearly50kilometers, of which14Section from Houchao Road to Nanxingqiao, total length955Meters, total795Ring. Deepest cover soil in interval24Meters, minimum line spacing10meters, the minimum turning radius is340m, maximum slope28.27‰, underpass soft soil mixed with gravel and round gravel ground,The geological conditions are uneven, complex and diverse. Three Three Industries tailored two excavation diameters for this project6480mmThe shield machine started to dig smoothly all the way.2019Year5Month, No.SS31702The earth pressure balance shield machine advances254When the shield tunneling speed dropped sharply, the cutter head torque increased, the equipment shook violently, and the tunneling state was abnormal. After detection, the volume in front of the shield machine cutter head is up24Cubic meters of huge boulder, detecting hardness up150MpaAbove. The construction personnel are very clear that regular the shield machine will not be able to continue tunneling, and the shield machine is close to the river above, the geological conditions determine that the shield machine cannot be taken out of the ground by digging the shaft. If the construction continues, the construction will be extremely difficult and risky-the most dangerous situation in tunnel construction has appeared.
According to the previous engineering practice, the construction personnel adopted the ground drilling method to crush the boulder. Several drilling rigs with different drilling diameters entered the site for construction, but they were unable to drill due to the excessive hardness of the boulder and the serious wear of the drill bit and gave up the operation. At the critical moment, after comprehensive analysis of geological conditions and careful study and judgment of various technical parameters of the shield machine, the scheme of replacing the initial tearing knife with a full-disc hob (the tearing knife of the three-three industrial shield machine can be replaced with a full-disc hob for installation) was finally determined to directly crush the boulder.
At the moment when the roar of the shield machine resounds, the speed of the cutter head increases2.0rpm/min, thrust increased1800T, the tunneling speed reached3-5mm/minThe progress of the steel dragon has been unstoppable. The total duration from self-recovery excavation to professional personnel entering the warehouse to check the cutter with pressure until the excavation is continued.2Days, the shield machine in the absence of any other auxiliary method, directly broken and passed smoothly.150MPaBig boulder.
"The sea is cross-flowing, and the heroic character is shown." The Three-Three Industrial Shield Machine broke the construction problem and successfully tunnelled for Hangzhou Metro.5The completion of Line No. 1 on schedule won precious time and once again proved that he is a well-deserved "king of complex geological excavation".
Key words:
RELATED INFORMATION
'Yujiang' sister flower smoothly offline
2023-11-22
Liaoning Censcience Industry Co., Ltd.
Address: No.33, Anyang Street, Xiangyang Industrial Park, Liaoyang City, Liaoning Province
Telephone:0419-7183999
Fax:0419-7183999
Sales:0419-7668333
E-mail:zhb@lnsstbm.com
Focus on us
sweep