Show“Drill”Home strength，Assist“Bridge”See the future。Recently，On the Shiziyang Passage Project at the Pearl River Estuary in Guangdong，Zoomlion large rotary drilling rigZR550GStanding on the shore，Work with all your strength，Win praise for super high pile-forming efficiency and quality，For the Guangdong-Hong Kong-Macao Greater Bay Area“Super Engineering”Speed up the construction and escort.。

△Zoomlion Rotary Drilling Rig Helps Build Shiziyang Passage

It is understood that，Upon completion, the Shiziyang Passage will be the largest in the world.、A double-deck suspension bridge with the highest pylon，It is the most difficult technology in the world.、One of the most complex bridges ever built，When completed, it will create a double-deck suspension bridge.“Main span、Number of lanes、The main tower is high、Anchor foundation、Main cable scale”Five world firsts。The main span of the double-deck steel truss suspension bridge of Shiziyang Passage is 2180 meters.，Must have strong anchorage and pile foundation to match，In order to pull up the whole bridge steadily.。The Contractor shall consider the construction demand，Large rotary drilling rig of Zoomlion has been introducedZR550G，Participate in the pile foundation construction of the east cable tower of the bridge。

The efficiency of pile foundation construction directly affects the progress of bridge construction，The verticality of the pile hole affects the bearing capacity of the pile.，It is related to the construction quality and safety of the whole bridge。Operating on land on the Dongguan sideZR550GIt is particularly outstanding in these two aspects.。“36 piles in total for the main pier，The pile diameter is 3 meters，Pile depth 59m-62 meters。There are many plagioclases here.，The project department requires high verticality.，The hole-forming deviation of 62m shall be controlled within 30cm.。ZR550GIt took six and a half days to form the first pile hole.，Deviation within 25cm，At that time, the technician said it was the most vertical pile in the field after testing.。”Wang Shifu, the operator of Zoomlion stationed at the scene, said.。

△Construction of Zoomlion Rotary Drilling Rig in East Cable Tower of Shiziyang Bridge

“The customer operator also commented that the power head of the equipment was more powerful than other similar models.，High tension of main hoist rope，Under the same working conditions, it is more fuel-efficient than the same level of models.，It took 172 hours to dry the first hol，Refuel 5600 liters，Average fuel consumption 33 litres per hour。At present, the equipment has been continuously constructed for 25 days.，Work 530 hours，The third pile is being drilled.，Good overall performance and stability of operator feedback，The operation is satisfactory。”Master Wang said。As ZoomlionGA member of the series of rotary drilling rigs“ General ”，ZR550GStrong and stable performance、The advantages of efficient and fuel-efficient construction have been verified again.。

The Shiziyang Passage will be another leap in the span and scale of China's bridge construction.。As a horizontal series of three metropolitan areas in Guangdong-Hong Kong-Macao Greater Bay Area、East-west trunk channel radiating east and west wings、It is an important part of the national coastal corridor.，The Shiziyang Passage is expected to be completed by 2027.，After completion, it will realize the integration of cities across the Straits.，One-hour traffic circle formed between major cities in Dawan District，It is of great significance to promote the high-quality development of Guangdong-Hong Kong-Macao Greater Bay Area.。