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china latest news about High-speed railway tunnel construction technology

High-speed railway tunnel construction technology

December 15, 2023

The construction of high-speed railway tunnels requires advanced technology and precision engineering to ensure safe and efficient transportation. High-speed rail has become an important part of modern transportation infrastructure, providing fast and reliable travel for millions of people around ...
china latest news about Application of low headroom rotary drilling rig

Application of low headroom rotary drilling rig

December 7, 2023

A low headroom rotary drilling rig is a specialized type of drilling equipment that can operate in areas with limited overhead clearance. It is commonly used in various industries and applications, including: Urban Construction: In urban areas where space is limited, low headroom rotary drilling ...
china latest news about Construction technology and key points of high-press churning pile

Construction technology and key points of high-press churning pile

November 24, 2023

High-pressure jet grouting method is to drill a grouting pipe with a nozzle into a predetermined position in the soil layer by using a drill machine, and use high-pressure equipment to make the slurry or water or air become a high-pressure jet of 20 ~ 40MPa from the nozzle, punching, disturbing and ...
china latest news about Design and construction technology of secant pile wall

Design and construction technology of secant pile wall

November 17, 2023

The secant pile wall is a form of pile enclosure of foundation pit. The reinforced concrete pile and plain concrete pile are cut and occluded, and Piles are arranged to form a wall of piles interlocking with each other. The shear force can be transferred between the pile and pile to a certain extent...
china latest news about How to remove pile head

How to remove pile head

November 10, 2023

The Contractor shall use crack inducer or equivalent low noise method for removal of pile head to cut-off level. The Contractor shall preinstall crack inducer to effectively render crack on the pile at about 100 - 300 mm above the pile head cut off level. The pile starter bars above this level shall ...
china latest news about What if shrinkage occurs during drilling?

What if shrinkage occurs during drilling?

November 2, 2023

1. Quality problems and phenomena When using a borehole probe to check for holes, the hole probe is blocked when lowered to a certain part, and the bottom of the hole cannot be inspected smoothly. The diameter of a part of the drilling is less than the design requirements, or from a certain part, ...
china latest news about 10 basic requirements for deep foundation pit support construction

10 basic requirements for deep foundation pit support construction

October 27, 2023

1. The construction plan of deep foundation pit enclosure must be determined according to the design requirements, depth and site environmental engineering progress. After spinning, the construction plan shall be approved by the chief engineer of the unit and submitted to the chief supervision ...
china latest news about How can the foundation be prevented from slipping or tilting when the foundation is geologically uneven?

How can the foundation be prevented from slipping or tilting when the foundation is geologically uneven?

October 20, 2023

1. Quality problems and phenomena The foundation slips or tilts. 2. Cause analysis 1) The bearing capacity of the base is not uniform, causing the foundation to tilt to the side with less bearing capacity. 2) The foundation is located on the inclined surface, and the foundation is filled and half...
china latest news about How to deal with hole collapse during drilling?

How to deal with hole collapse during drilling?

October 13, 2023

1. Quality problems and phenomena Wall collapse during drilling or after hole formation. 2. Cause analysis 1) Due to the small mud consistency, poor wall protection effect, water leakage; Or the shell is buried shallow, or the surrounding sealing is not dense and there is water leakage; Or the ...
china latest news about How to ensure the pouring quality of the dug pile concrete?

How to ensure the pouring quality of the dug pile concrete?

September 28, 2023

1. Quality problems and phenomena Concrete segregation; The strength of concrete is insufficient. 2. Cause analysis 1) There are problems with concrete raw materials and mix ratio, or insufficient mixing time. 2) No strings are used when injecting concrete, or the distance between the strings and ...
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