Recently, XCMG XR800E, the world's largest tonnage rotary drilling rig, has received a construction report. The first XCMG XR800E has assisted Evergrande Shenzhen Bay Project. At present, more than 30 holes have been formed, including 3 holes with a diameter of 3 meters and a depth of 70 meters, which is greatly shortened. Time limit.

The world's first diamond to help the pinnacle

The new headquarters building of Evergrande Group is located in Shenzhen Bay Super Headquarters Base, with a total construction area of 343,000 square meters, a building height of 393.9m, 71 floors above ground and 6 floors underground. The pinnacle.

The XCMG XR800E, which assists Evergrande's super headquarters, has the title of the world's first drill. It is designed to meet the construction of super deep, super large diameter, hard rock formation pile foundations for large bridges across rivers and seas. The maximum drilling diameter is 4.6m, the largest The drilling depth is 150m, which is a landmark product of the global pile driver.

Superior construction with three high features

The super headquarters of the Evergrande Center Project is not only reflected in scale and status, but also in foundation construction. Compared with general house construction piles, its engineering piles are large in diameter and are ultra-deep holes, and the depth of rock penetration is more than 40 meters, which is equivalent to driving a depth of 14 floors deep underground! Such a difficult pile diameter requirement is only a problem for foundation construction, and it is even more difficult to ensure the perpendicularity of the pile diameter. But for the world's largest tonnage rotary drilling rig, this is a head-to-head contest!

In dealing with ultra-deep and super-strength rock penetration, the working torque of XCMG XR800E can reach 792KN·m, which is about twice that of ordinary rotary drilling rigs. The construction method adopts the stepwise drilling method, which is progressively advanced. The super-strong torque is like a strong sailor. With a suitable roller cone drill, the core of the hard rock can be directly removed in one step, and the height of the core of the removed rock pier can reach 1 The high manpower greatly improves the construction efficiency and further shortens the construction period.

The construction of XCMG XR800E embodies the characteristics of three highs compared with the traditional process operation methods.

High quality, in terms of verticality of construction, XR800E can ensure that the deviation of verticality is within 1% according to its own mechanics and hydraulic control system, which is difficult to guarantee the verticality of traditional reverse circulation drilling rigs;

High efficiency, for ultra-deep piles with a diameter of 3 meters, XCMG XR800E construction takes 7 days, and the construction efficiency is more than 4 times higher than the traditional process;

High efficiency, using XR800E construction, low drilling tool loss, less mud production, economical and environmental protection, the construction period can be guaranteed, which is difficult to achieve with traditional reverse circulation drilling rig construction.

XCMG XR800E won the TOP50 Technology Innovation Gold Award of China Construction Machinery Annual Product with its unique large-tonnage innovative technology. From the plateau frozen soil of the Qinghai-Tibet line to the winter construction of the Harbin-Dalian line, from the hard rock construction of the Shanghai-Kunming line to the large-aperture, deep-pile bridge piles and real estate piles all over the world, on highways, high-speed railways, bridges, houses In the fields of construction and municipal construction, XCMG rotary drilling rig is committed to providing more solutions for underground construction.

In the future, XCMG will accelerate the technological innovation process, help optimize and upgrade the industrial structure, strive to provide the best products and services for global customers, and lead the full-speed development of the construction machinery industry. Editor/He Yuting