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On the press release of HIGHSPEED 2010, He Huawu, the Chief Engineer from Ministry of Railways and Academician from Chinese Academy of Engineering, expressed that revenue kilometers of China railway will reach 110 000 in 2012, which contains 13 000 kilometers new-built high-speed railways. The rush of Chinese infrastructure construction leaded by High-Speed Rail (HSR) pushes Chinese construction machinery development, especially pile machinery.

High efficient and high quality equipments become the first choice for HSR construction

At the first half of 2010, Chinese pile machinery market developed fast. According to experts’ forecast, need of pile machinery increased 20% upon that of 2009. Take SUNWARD as an example, which is the largest pile machinery manufacturer in China, according to the corresponding period of 2009, its first half year’s pile machinery sales increased 134.58% in the first half year of 2010. Rotary drilling rigs, as SUNWARD major pile machinery are widely applied in construction of highway, railway, bridge and high-rise building. At present, HSR piling foundation construction requires rotary drilling rigs enormously, which is one of the major stimulations for sales growth of SUNWARD pile machinery.

"SUNWARD rotary drilling rigs are widely used in HSR for their qualification." Says one of the construction machinery experts, "There are more railways to be constructed in the second half year, which means there will be a growing demand for SUNWARD rotary drilling rigs." According to experts’ opinion, market of construction machinery, such as excavators, loaders, rotary drilling rigs will be promoted obviously by HSR construction. At the same time, electric traction and regeneration braking are becoming the measurement criteria of construction machinery purchase.

Mao Zhongwen, Deputy Secretary-General of China Construction Machinery Association, said that 20t rotary drilling rig, large-tonnage compact machinery and 40t gantry crane are mainly purchased equipments for railway construction.

SUNWARD Rotary Drilling Rig "show strength" in HSR

Equipment standards for HSR construction are becoming the filters of construction machinery market, as well as that of innovation technology of construction machinery manufacturers. SUNWARD successfully came through this wash-out tidal wave for its independent innovation system. SUNWARD construction machinery shows in HSR and subway construction, such as Wu-Guang HSR, Jing-Hu HSR and Lan-Xin HSR.

At most HSR and subway construction project, rotary drilling rigs are widely used. SUNWARD rotary drilling rig is a new piling equipment for cast-in-place piling construction. Taking the independent innovated special chassis to improve the stability; taking the independent innovated control system to improve the speed of feedback and precision. It could be applied in most complex construction, as well as the "deeper drilling" construction for HSR.

HSR construction techniques are so complex that perfusion piling is frequently required during the whole underground construction. In those constructions, grade A is the standard for all perfusion pile. SUNWARD rotary drilling rig has characteristics of high-speed, stability, safety, agility and in-time after-sale service, which could fit the requirement of HSR construction perfectly. What’s more, solutions for construction problems could be offered by SUNWARD operation engineers.

In June 2005, Wu-Guang HSR construction started. SUNWARD rotary drilling rig put on its show here, as well as in Wu-Guang passenger special line, which contains San Heba Bridge, Bangchong Bridge in Hengyang, Hankou station, Xianning Bridge, Changsha station and Zhuzhou station.

In the middle of December 2007, SUNWARD rotary drilling rig drove to join in the construction of Da Shengguan Bridge of Jing-Hu line in Nanjing. As the first drilling machine for Jing-Hu line construction, SUNWARD rotary drilling rig successfully finished its assignment, and then went to construct Changzhou East Bridge.

In January 2010, SWDM22 rotary drilling rig successfully finished piling test at the work site of Ha Daqi HSR in Hei Longjiang Province. SUNWARD equipment was the first one to finish pile testing at the temperature of minus 30 degrees.

In May 2010, Lan-Xin HSR construction hugs a rapid development. Its medium bridge locates on a lithosphere, and according to the project standard, the foundation construction of bridge requires more than 30 holes with average depth of 20 meters. SWDM25-S rotary drilling rig successfully drilled into the slightly weathering lithosphere more than 20 meters, thus SUNWARD rotary drilling rig becomes the example of hard rock penetration for its advantage of technique integration.

Example of rock with 90 centimeters in Lan-Xin HSR construction

Besides railway construction, SWDM Series rotary drilling rig displayed advantages in civil constructions such as subway, high-speed road, airport and etc. More applications are made in HSR constructions of Beijing, Guangzhou, Wuhan and Changsha. SUNWARD rotary drilling rigs could be seen everywhere in Wuhan and Changsha HSR construction work sites.

More new machines are launched

"We are keeping eyes on HSR construction, and more rotary drilling rigs especially for HSR constructions are being innovated." Zhu Jianxin, the General Manager of SUNWARD Foundation Equipment Branch agreed that perfusion piling foundation constructions are widely needed in HSR construction, which leads to more requirement of upgraded rotary drilling rigs, "We’re upgrading and improving inhered rotary drilling rig, as well as innovating more different rotary drilling rigs to meet different construction standards. For example, we launched SWDM42 especially for standard of large diameter holes drilling, with the drill’s diameter reaches 3 meters and depth reaches 105 meters."

SUNWARD Rotary Drilling Rig SWDM42 exhibited on Bauma Shanghai

SWDM42, Large-Dia Drilling Pipe Machine and Sleeve Screw Drill took the first show at Bauma Shanghai. SUNWARD Large-Dia Drilling Pipe Machine has a unique advantage – integration of pile driver and rotary drilling rig. It is said that this machine could instead of rotary drilling rig someday. Sleeve Screw Drill has solved the difficulty of high-effective hard rock penetration with large diameter drill.

Efficient Instrument for Rock Penetration - Sleeve Screw Drill

According to construction machinery experts, Chinese construction manufacturers could improve to be high-end companies with the tide of HSR construction. SUNWARD is one of the leading enterprises among them.