Recently, at the Shenzhen Urban Rail Line 8 project site, piling equipment has been operating with exceptional intensity. However, one piece of equipment and its construction method, with outstanding performance and remarkable efficiency, has become a model for other equipment on the same site — the DTH hammer construction technology and method provided by Dongguan Jieda Engineering Technology Co., Ltd. (Dongguan Jieda).

Due to the special geographical environment of the southern region, the Shenzhen Urban Rail Line 8 project is a relatively complex engineering undertaking. The piles are 1 meter in diameter and 18–21 meters deep, with rock compressive strength of 90–100 MPa. Given the tight schedule and heavy tasks, the Shenzhen Urban Rail Line 8 project has undoubtedly brought construction challenges to the contractor and placed higher demands on the efficiency of construction equipment. Among the equipment on site, the rock-drilling method combining Dongguan Jieda's large-diameter DTH hammer with Sunward's upper and lower dual power heads and forward/reverse casing 2512 drilling rig has become a focal point on the site.

Dongguan Jieda is a company specializing in the sale, maintenance, and leasing of large-diameter rock-drilling DTH hammers, the matching of rock-drilling rigs, and pre-construction consulting. Since introducing China's first upper and lower dual power head, forward/reverse casing drilling rig combined with DTH hammer rock-drilling method in 2006, the company has been widely praised by the industry. Dongwoo Soowon and Daechang Heavy Machinery of South Korea are both long-term designated cooperation agents of Dongguan Jieda. Adhering to the principle of comprehensive and systematic service, and in order to reduce customers' construction costs, the company has cooperated with professional manufacturers in South Korea to establish a DTH hammer sales and after-sales service center in China, gradually localizing spare parts, so as to better assist customers in smoothly completing construction and create maximum returns for them.

In the construction of the Shenzhen Urban Rail Line 8 project, Dongguan Jieda demonstrated an unstoppable momentum on site, overcoming every hard obstacle. Through refined operation and matching, continuous operation of the drilling rig is ensured. Rock penetration averages 2–3 meters per hour, and drilling efficiency reaches 7 times that of the 360 rotary drilling rig operating on the same site! DTH hammer rock drilling differs from other equipment and methods: it is a process that requires close cooperation between the work crew and the equipment, meticulous attention, and real-time confirmation of operating conditions. This requires the equipment supplier and the actual operators to prepare contingency plans in advance for possible problems and to communicate in real time, so as to ensure overall operating efficiency. Through timely mutual communication on the Shenzhen site, the contractor used a two-person small crew for single-shift operation paired with a small excavator to bring the construction equipment to its optimal state, fully leveraging the rock-drilling advantages, which not only greatly satisfied the project owner but also earned high praise.

The outstanding performance of Dongguan Jieda's DTH hammer construction technology and method in efficiently supporting the Shenzhen Urban Rail Line 8 project has not only laid a solid foundation for the project's completion on schedule or even ahead of schedule, but has also played a leading role in advancing China's piling machinery manufacturing toward the world's forefront, and is of great significance for Dongguan Jieda's products in capturing the local market and enhancing their influence at home and abroad. Dongguan Jieda is committed to creating wealth for engineering companies and making greater contributions to China's construction!