China Deep Foundation Engineering Network NewsOn May 30, the ninth live broadcast of the event "My Technology, I Present It" hosted by the Foundation Engineering Academy attracted numerous experts, scholars, and participants in the foundation engineering field. This episode was moderated by Yang Shenggui, Chief Engineer of Jianyan Foundation Engineering Co., Ltd., with Wang Chunhu, Senior Engineer of the Beijing Zhengyuan Squeezed-Expansion Technology Development Center, as the keynote speaker. The event focused on innovative technologies in the foundation engineering field, and this episode highlighted the design and construction technology of the visualized squeezed-expansion branch/plate cast-in-place concrete pile. The squeezed-expansion branch/plate cast-in-place pile is a pile foundation technology developed in the early 1990s. By installing bearing plates or branches at different sections of the pile shaft, it increases the bearing capacity of the pile and reduces settlement, delivering significant economic and social benefits.

Moderating expert: Yang Shenggui, Chief Engineer of Jianyan Foundation Engineering Co., Ltd.

In this episode, Engineer Wang Chunhu mainly explained to us: The squeezed-expansion branch/plate cast-in-place pile, referred to as the squeezed-expansion branch/plate pile, is a pile foundation technology originating in the early 1990s and was once named the multi-branch bearing plate load-bearing pile. This technology has successively been included by the State Science and Technology Commission, the State Bureau of Quality and Technical Supervision, and other departments in the "Major Scientific and Technological Achievements Promotion Program," the "Key *** Torch Program," and the "National Key New Product" list. By installing bearing plates or branches at different sections of the pile shaft, the squeezed-expansion branch/plate pile turns the cast-in-place pile into a variable-cross-section, multi-support friction end-bearing pile, thereby significantly increasing the bearing capacity of a single pile and reducing settlement. Compared with ordinary bored cast-in-place piles, it can save construction materials, reduce work quantities, lower project costs, and shorten the construction period, delivering good economic and social benefits.

Keynote speaker: Wang Chunhu, Senior Engineer of the Beijing Zhengyuan Squeezed-Expansion Technology Development Center

With the continuous development of information transmission technology, the squeezed-expansion branch/plate pile has been combined with industrial IoT technology to form the visualized squeezed-expansion branch/plate pile technology. By installing industrial sensors on the squeezed-expansion branch/plate equipment, the main squeezed-expansion parameters are digitized to achieve visualized monitoring. On-site managers can use the branch/plate quality monitoring instrument to carry out precise real-time measurement of hydraulic pressure and flow, observe the squeezed-expansion process, and realize functions such as backtracking of the squeezed-expansion process and construction alarms. At the same time, through IoT and cloud platform technology, intelligent management of on-site squeezed-expansion construction and branch/plate quality has been achieved. This ultimately shaped the current visualized squeezed-expansion branch/plate cast-in-place pile technology.

The visualized squeezed-expansion branch/plate pile is a classic case of the successful application of digitalization and IoT in the field of engineering quality control. Since its launch, this technology has been applied in projects across multiple industries, including civil buildings, municipal engineering, bridges, logistics, and chemicals, ensuring the construction quality of squeezed-expansion branches/plates and receiving unanimous praise from design units, supervision units, and construction units. The already issued "Standard for Testing of Squeezed-Expansion Branch/Plate Cast-in-Place Piles" (T/CECS 1433-2023) will officially take effect in March 2024, marking that this technology will be further promoted and developed.

Q&A session

Through this episode of the live broadcast, we gained an in-depth understanding of the development history and innovative applications of the squeezed-expansion branch/plate cast-in-place pile technology. Engineer Wang gave a detailed introduction to the working principles and technical advantages of the squeezed-expansion branch/plate pile, as well as the visualized monitoring system formed by combining it with industrial IoT technology. This technology not only improves the bearing capacity of a single pile and reduces settlement, but also saves construction materials and reduces work quantities, playing a positive role in improving project quality and efficiency. Thank you to Engineer Wang for his excellent presentation in this event, which gave us a deeper understanding and recognition of the value and future development prospects of the visualized squeezed-expansion branch/plate pile technology.

The "My Technology, I Present It" series is an important platform for promoting the sharing of innovative technologies and driving industry development. By sharing their respective technological achievements, alliance members have promoted the continuous updating of industry technologies and the dissemination of innovative concepts. Each episode has attracted the attention of numerous industry experts and scholars, building a bridge for exchange and cooperation in the field of foundation engineering technology.