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Building bridge piers in the desert: what's different?

Among the 434 piers of the three bridges on the Hotan-Ruoqiang Railway—the Niya River Grand Bridge, the Ruokeya Grand Bridge, and the Yatongguzi Bridge—prefabricated double-column assembled piers were used. Don't underestimate these several hundred piers; they embody numerous technological innovations and are of great significance!

2022-06-27
Can You Perform the Check Calculation for Confined Water Inrush in Foundation Pits?

When confined water exists beneath a foundation pit, excavation reduces the thickness of the impermeable layer overlying the aquifer. Once this thickness is reduced to a certain extent, the hydraulic head pressure of the confined water can fracture or burst through the impermeable layer, causing confined water inrush in the foundation pit.

2022-06-27
Ultra-Difficult Top-Down Construction: Where's the Challenge? An On-Site Exploration!

The top-down construction technique first builds the retaining structure along the perimeter of the basement, then constructs the beam-and-slab floor structure at the zero-meter level to serve as horizontal bracing. Subsequently, soil is excavated downward layer by layer while each level of the underground structure is cast, until the base slab is sealed at the bottom. In terms of the sequence in which the underground structure is formed, it is built layer by layer from top to bottom—exactly the reverse of the traditional sequence—and is therefore called the "top-down method."

2022-06-20
Zhongke Zhenyu DTH Hammer Sharing: What Is the Capsule-Type Expanded-Body Anchor Technology? A Detailed Introduction to the Construction Process of Capsule-Type Expanded-Body Anchors

Capsule-type expanded-body anchor technology was developed by Central Research Institute of Building and Construction Co., Ltd. (MCC Group) and China Jingye Engineering Technology Co., Ltd. in response to major technical challenges associated with domestic and foreign mechanical reaming anchors and jet-grouting reaming anchors, including uncertainty in the shape and size of the expanded cavity, low strength of the cement-soil in the expanded anchorage section, difficulty in controlling construction quality, and the technology of removable expanded-body anchors. Guided by the market demand for geotechnical anchorage in China and benchmarked against the latest international expanded-body anchorage technologies, the developers achieved original innovation and made breakthroughs in 10 key technologies.

2022-06-17
New Technology for Rebar Connection in Prefabricated Buildings: Double Coupler Sleeve

The double coupler sleeve is a new technology for mechanical connection of building rebar, used for rebar connections in building structural components and rebar assemblies.

2022-06-15
A Comprehensive Interpretation of the "Seven-Character Guideline" for Ground Treatment!

There are many methods for ground improvement and reinforcement, but in summary they come down to seven characters: "excavate, fill, replace, tamp, press, squeeze, and mix."

2022-06-14
6 Construction Technologies to Improve the Efficiency of Building Foundation and Underground Space Construction—Which Have You Used?

As buildings increasingly develop toward greater depth, height, and complexity, deep foundation pit construction occupies a long portion of the construction schedule, especially during the earthwork excavation stage. How to accelerate the removal of excavated soil from deep foundation pits is a construction challenge that needs to be solved.

2022-06-10
Support Piles Change from Vertical to Inclined: Reducing Material Use Without Compromising Quality in Building Foundation Pits

Different combinations of inclined pile support structures can adapt to a variety of support conditions and, without the need for horizontal internal bracing, can steadily control support deformation and the surrounding environment.

2022-06-09
Pile Foundations: What You Must Know About Investigation, Design, and Construction

For friction piles, the center-to-center spacing should not be less than 3 times the pile shaft diameter; for belled cast-in-place piles, the center-to-center spacing should not be less than 1.5 times the bell diameter; when the bell diameter exceeds 2 m, the clear spacing at the pile tip should not be less than 1 m. When determining pile spacing, the effects of soil displacement and other construction-process effects on adjacent piles should also be considered.

2022-06-08
Pile Foundations Can't Just Be Driven Anywhere—Did You Know?

A pile foundation is a type of deep foundation, slender and columnar or cylindrical in shape. It is made of materials such as steel or concrete used to support structures. It is then used to transfer loads at the required depth through skin friction or end bearing.

2022-06-08
A Survey Borehole That Can "Turn" Is Here

As it happens, this type of borehole is termed directional drilling, and it is commonly used in the exploration and development of oil and natural gas, coal, and other solid mineral resources. Because boreholes for water conservancy and hydropower engineering surveys require continuous coring or various tests throughout the process, the challenge is considerable, and thus they are rarely used.

2022-06-08
Introduction to Self-Stabilizing Foundation Pit Support Structure Technology (SKY-STAR Technology)

As China's urbanization process becomes increasingly pronounced, the contradiction between supply and demand of urban space capacity is growing ever more prominent. The 13th Five-Year Plan strongly advocates the development and utilization of urban underground space as an effective way to address the shortage of urban construction space and enhance the comprehensive functions of cities. The development of underground space inevitably involves foundation pit engineering.

2022-06-08

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