//Wechat public account setting tips/// The official account is official
.
NOCITCE changed the push rule because of WeChat official account
.
If you don’t want to miss the highlight of this official account, please put the public number of construction technology as the star sign and click “collect”, “look at” and “Zan” at the end of the text, so that each new article will appear in the subscription list at the first time
.
Star setting: enter the official account home page, click on the top right corner, click “set star”, and yellow star will appear next to the official account name (Android and iOS user operation is the same)
.
When it comes to tunnel construction, do you immediately feel that this is a special “ground gas” thing, which is nothing more than drilling, blasting, digging, hollowing out the mountain, digging out a passage, and then there is a boom? Is there a big crowd? Dust? Fuzhou Xiamen high-speed railway, which is constructed by China Railway 12th bureau group, is the longest tunnel of the first cross sea high-speed railway in China
.
The 10669m Yangmeishan tunnel has broken through the bottleneck of the whole project construction
.
In the process of tunnel construction, the traditional and extensive “sea of people tactics” are no longer applicable to the “infrastructure maniac”, which gives rise to the mechanization, intelligence and flexibility of tunnel construction The Yangmeishan tunnel is the famous “hard stubble” of Fuzhou Xiamen high speed railway
.
As a key controlled high-risk tunnel along the whole line, the maximum buried depth of Yangmeishan tunnel is 398 meters, which is equivalent to the problem of rock burst and high geothermal in the 100 storey super high-rise building
.
The rock burst section is 2290 meters long, and the dense geological faults crisscross, causing the strata collapse Quiet and serene is nothing special, but the daily operation of rich water and fault fracture zone in the tunnel is like this 58 Mechanical construction system for mechanical equipment installation “brain” extension “limbs” with “mechanical Transformers” instead of human construction to help the transformation and upgrading of high-speed railway tunnel construction is not beneficial, video perception 👇👇👇 Tunnelling is to “fight wits and braves” against difficulties, in which the difficulties and obstacles will be the first step How to deal with the dual challenges of security and technology? Yangmeishan tunnel builders explore the use of “visual drilling + three arm rock drilling jumbo + water pressure smooth blasting” mode, which has changed the extensive operation mode of manual drilling in the past
.
Yangmeishan tunnel mechanized construction system visual advanced horizontal drilling can quickly and accurately detect the geological structure in front, synchronously upload the survey results, and send instructions to three arm rock drilling after being processed by information intelligent management platform Accurate drilling by trolley according to instructions, water pressure smooth blasting, accurate blasting, average drilling time reduced by 30 minutes In order to improve the drilling accuracy of the three arm rock drilling jumbo, the builder developed the technology of “pick drill rod bending rod drilling”, which effectively enhanced the flexibility of the three arm rock drilling jumbo drill pipe, realized the full coverage of the blind area of the working face, accurately controlled the depth of different geological drilling, and achieved the best blasting effect Three arm rock drilling jumbo realizes digital construction face water pressure smooth blasting, explosive dosage is controlled to gram, weak blasting tunneling is realized, violent vibration of extensive blasting is avoided, risk of rock burst is effectively reduced, overbreak is controlled within 10 mm, lining concrete consumption is significantly reduced Blasting effect comparison (traditional blasting at the lower right) Will “big guys” be “acclimatized”? In order to adapt the large-scale mechanical equipment to the special geological conditions and improve the safety quality of the project, the builders carried out technical innovation around the mechanical equipment, and constructed a complete set of new tooling process system from tunnel excavation to maintenance operation
.
The new secondary lining concrete pouring system was applied in the excavation construction, and the mobile controlled blasting protective cover technology was applied to create the steel “Golden Bell” application hydraulic inverted arch with escape passage The trestle improved the lining spray maintenance trolley to realize the automatic intelligent maintenance of the tunnel ■ innovative application of a variety of new tooling and equipment, the construction of OCS and ditch cable trench adopts OCS pillar and anchor positioning technology, the embedded technology of OCS trench, the movable formwork of ditch cable trench to eliminate the problem of concrete honeycomb and pockmarked surface, and the construction cycle is only one day, which is more than three times higher than the previous construction efficiency Standardized tunnel excavation system and the third pass of standardized tunnel excavation system are discussed How to coordinate and command a large number of mechanical equipment in large regiment operations? It’s not easy for Yangmeishan tunnel to use so many mechanical equipment for coordinated command, The builders have fully integrated them into the information intelligent management platform, and the managers can remotely command the construction of six working faces, including the entrance and exit of Yangmeishan tunnel, to realize the “point type” digital and accurate construction The temperature control and automatic spray maintenance platform forms a mechanized construction operation line
.
Through the access to the information intelligent management platform, the on-site perception module is established to form the “mechanization + intelligent brain” construction management mode
.
The three-dimensional laser scanning is used to build the tunnel structure intelligent management platform
.
The “cloud + end” form of construction integrated monitoring management system is adopted
.
The management personnel can follow the construction process through mobile phones and other mobile clients Check the site construction situation, issue construction instructions synchronously, command tunnel machinery “big regiment” cluster operation ■ mobile phone and construction management realize interconnection, realize real-time transmission of site construction data, integrate construction data, build three-dimensional construction model, optimize construction data through wargame deduction, formulate the best “package” for different operation equipment, and command precise construction personnel of mechanical equipment Staff input has been reduced by two-thirds compared with the past, creating a construction record of 200 meters per month for the whole line} using tunnel model to guide mechanized construction, building bridges when encountering water, and writing the record of “longest, largest and highest” into the history of bridge and tunnel construction in the world
.
The copyright belongs to the original author and the original source, if the original copyright owner does not agree
.
