Pearl river delta water resources allocation project · Project plan

One of 172 major water conservancy projects of the state and the largest water conservancy project invested by guangdong province — & ndash; The water resources allocation project in the pearl river delta (PRD) will resume work in an orderly manner from February 10. Jintai SX50 double-wheel milling bears the brunt, taking the lead in the first milling after the completion of A3 standard no. 4 well, helping the national key project to resume production.

Pearl river delta water resources allocation project - well 4 engineering

Pearl river delta water resources allocation project water transmission line through the pearl river delta core city cluster, the total length of more than 113.2 km. The river network of the delta is densely covered, the soft foundation is deep, the strata undulations are changeable, and the engineering geology and hydrogeology conditions are complex. The ground buildings are dense, the underground infrastructure is crisscross-crossing, and the pipeline adopts the method of deep buried shield, with an average depth of 40 meters to 60 meters, which requires very high deformation control, and the construction is very difficult.

In view of the key and difficult points of construction technology, shield working well construction adopts “ Rotation + grab + milling ” In this way, the rotary drilling machine is first used to drill the hole to the bottom of the wall, the soil layer and the whole weathered rock layer are slotted by hydraulic grab, the rock with strong weathering strength is constructed by double-wheel milling, and the underground diaphragm wall joint is used by milling joint.

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Pearl river delta water resources allocation project - well 3 engineering

(jintai SX50 double wheel milling has achieved a record of 78m super deep ground wall, refreshing the grooving depth of domestic double wheel milling)

In January this year, Shanghai jintai SX50 twin-wheel mill successfully completed the project of 25 plots of well 3 of foshan section of the pearl river delta water resources allocation project. According to the project department, well 3 is the most difficult and deepest shield well in the entire pipeline.

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right milling wheel ↓

The milling wheel works continuously for about 2000 hours with clear oil

SX50 twin-wheel milling has been working continuously for 78 days, exceeding expectations to complete 25 trench sections with a width of 1.2m and a depth of 75m to 78m, setting a record for guangdong hydropower station no.2 and setting a benchmark for water resources allocation project in the pearl river delta.

After the completion of well 3, SX50 moved to well 4 on Spring Festival eve.

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In the first week after resumption of production on February 14th, Shanghai jintai has been working full speed day and night to serve customers wholeheartedly

120kNm high-torque twin-wheel milling arrived at the construction site of well 10, water resources allocation project in the pearl river delta on February 17th

While well no. 4 is at full speed, well no. 10 of the pearl river delta water resources allocation project in dongguan has also been received. Starts to & throughout; . Due to the outstanding performance of jintai double-wheel milling in well no.3 and no.4, the project department urgently purchased a jintai double-wheel milling, which was composed of another jintai SX40 at the site of well no.10. Two-horse chariot ” We will ensure that the project is completed on schedule.