Enterprise News | Strengthening the Foundation of a Transportation Hub! Longli Construction Empowers Nanjing North Station with Three Major Pile Methods

2025-06-19 4847 0人评论

In the construction wave of the Nanjing North Station transportation hub,Longli Construction, with its hardcore technical strength and rich construction experience, has undertaken three core construction tasks: TRD method piles, MJS method piles, and RJP method piles, using craftsmanship to build a solid underground Great Wall for the rise of this future city.


Longli Construction


Nanjing North Station




    Facing soft soil layers,high groundwater levels,tight schedules, and high-quality requirements,Longli Construction deployed a "steel matrix" composed of 3 TRD method machines, 9 RJP and MJS jet groutingmachines, 12 excavators, 10 cranes, and 13 generators.


01


TRD Method Piles


    TRD method piles, also known as equal-thickness cement-soil mixing continuous wall method, is an advanced underground continuous wall construction technology used for deep foundation pit support, seepage prevention curtains, and foundation reinforcement.

1
Continuous seamless wall

Through horizontal cutting and mixing, an equal-thickness continuous wall is formed, with excellent impermeability and integrity, suitable for seepage prevention curtains or retaining walls.

2

Large depth



Maximum construction depth can reachover 60 meters, with high wall verticality.

3
Strong adaptability

Strong cutting ability in hard strata (such as gravel layers, soft rock), no pre-drilling required.

4
Environmentally friendly and low noise

Low construction vibration and noise, suitable for dense urban areas.

5
Economical

Compared with traditional underground continuous walls, lower cost and shorter construction period.

02


MJS Method Piles


    MJS method piles, also known as omnidirectional high-pressure jet grouting method, is an improved foundation treatment and pile foundation construction technology that forms reinforced piles or waterproof curtains through high-pressure jet grouting.

1
Ultra-high pressure jet

Using ultra-high pressure water/grout jet of over40MPa, large pile diameter (up to 2.5~3 meters), high pile strength (cement-soil strength can reach over 5MPa).

2
Precise control




Real-time monitoring adjusts jet pressure and lifting speed to ensure pile quality, with vertical accuracy up to1/200.

3
Strong slag discharge capacity

Unique multi-hole slag discharge technology reduces soil disturbance, suitable for loose sand layers or silt strata.

4

Micro-disturbance construction



Minimal impact on surrounding buildings, suitable for areas adjacent to subways and pipelines.


5
High flexibility

Can implement horizontal, inclined, or vertical piles to meet complex spatial requirements.


03


RJP Method Piles
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    RJP method piles are a high-pressure jet grouting foundation reinforcement technology that cuts soil through ultra-high pressure cement grout and air composite jet, and mixes with the original stratum to form a high-strength consolidated body.

1
Multi-axis layered jet

Using double-pipe or triple-pipe high-pressure jet (air, water, grout) to form large-diameter (2~3 meters) high-strength piles (strength up to 8~10MPa).

2
Deep reinforcement

Effective treatment depth exceeds50 meters, especially suitable for deep soft soil layers or sand layers with groundwater.

3
High water tightness

High pile density, low permeability coefficient (10⁻⁶~10⁻⁷ cm/s), outstanding seepage prevention effect.

4
Fast construction speed

Short single pile formation time, suitable for projects with tight schedules.


5
Economical

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