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How is the diaphragm wall constructed
Diaphragm wall is a diaphragm wall with anti-seepage (water) retaining and load-bearing functions, formed by excavating a narrow and deep trench underground with the help of excavation machinery and mud protection, and constructing suitable materials such as reinforced concrete in the trench. It ...Read more -
Construction technology of long spiral bored pile
1、 Process characteristics: 1. Long spiral drilled cast-in-place piles generally use superfluid concrete, which has good flowability. Stones can suspend in the concrete without sinking, and there will be no segregation. It is easy to put it into a steel cage; (Superfluid concrete refers to conc...Read more -
Key points for implementing pile foundation testing
The starting time of pile foundation testing should meet the following conditions: (1) The concrete strength of the tested pile should not be lower than 70% of the design strength and should not be lower than 15MPa, using strain method and acoustic transmission method for testing; (2) Using the c...Read more -
7 methods for pile foundation testing
1. Low strain detection method The low strain detection method uses a small hammer to strike the pile top, and receives stress wave signals from the pile through sensors bonded to the pile top. The dynamic response of the pile-soil system is studied using stress wave theory, and the measured velo...Read more -
Reasons and preventive measures for causing steel cage to float up
The reasons for causing the steel cage to float up are generally: (1) The initial and final setting times of concrete are too short, and the concrete clumps in the holes are too early. When the concrete poured from the conduit rises to the bottom of the steel cage, the continued pouring of concre...Read more -
Introduction to CFG pile
CFG (Cement Fly ash Grave) pile, also known as cement fly ash gravel pile in Chinese, is a high bonding strength pile formed by uniformly mixing cement, fly ash, gravel, stone chips or sand and water in a certain mix proportion. It forms a composite foundation together with the soil between the p...Read more -
Construction method of drilling bore piles with rotary drilling rig in hard limestone formations
1. Preface Rotary drilling rig is a construction machinery suitable for drilling operations in building foundation engineering. In recent years, it has become the main force in pile foundation construction in bridge construction in China. With different drilling tools, rotary drilling rig is suit...Read more -
Construction technology of offshore deepwater steel pipe piles
1. Production of steel pipe piles and steel casing The steel pipes used for steel pipe piles and the steel casing used for the underwater part of boreholes are both rolled on site. Generally, steel plates with a thickness of 10-14mm are selected, rolled into small sections, and then welded into ...Read more -
Introducing the New Fully Hydraulic Water Well Drilling Rig
A new medium-sized, efficient, and multi-functional drilling rig has been making waves in the construction industry. The fully hydraulic water well drilling rig is equipped with advanced features that make it a versatile and powerful tool for various drilling applications. One of the key features...Read more -
Construction of prestressed pipe pile foundation by drawing hole method
(1) The diameter of the pilot hole should not exceed 0.9 times the diameter of the pipe pile, and measures should be taken to prevent the collapse of the hole, and the depth of the pilot hole should not exceed 12m; (2) It is advisable to use long auger drill hole, long auger drill can drill throu...Read more -
Hydraulic pile breakers: how do they work?
Hydraulic pile breakers are powerful machines used in construction and civil engineering to break large piles into smaller parts. These machines are critical for projects involving the installation or removal of piles, such as building foundations, bridges, and other structures. In this article,...Read more -
Horizontal Directional Drilling Rig: Revolutionizing Underground Construction
Horizontal directional drilling (HDD) has emerged as a game-changing technology in the field of underground construction, and the key to its success lies in the horizontal directional drilling rig. This innovative equipment has revolutionized the way underground infrastructure is installed, allow...Read more
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