the Office Building for Public Administration in Lot 25 at NAPE - Foundation and Basement

Project No. 24/2022

Project Status as of July 2023

Scope of Work:

This project is located in Lot 25 at NAPE, covering an area of 6480 square meters. It is planned to construct two government office buildings with 12 floors and 17 floors respectively, and a 3-story basement parking lot. And the building will be used by government departments as offices.

The scope of work of this contract includes pile foundation, excavation and basement retaining support, and the construction of reinforced concrete structures from basement three to ground floor slabs. The pile foundation of this project will use the bored weight injection piles: with 24 piles of the 1.5-meter diameter, 26 piles of the 2.0-meter diameter, and 50 piles of the 2.5-meter diameter. The basement retaining adopts the steel pipe pile wall with a diameter of 508mm in the H-beam supporting method. Apart from the steel pipe pile, a water-stop curtain will be applied. At the bottom of the foundation pit, a high-pressure jetting pile with a diameter of 800mm will be attached for the soil improvement. The basement structure is mainly reinforced concrete structure.

Current Progress:

At present, the project has completed the overall progress of 47.5% on schedule., the project is carrying out drilling and perfusion engineering, earth blocking steel pipe project, water-stop curtain project, geological improvement project and surrounding environmental monitoring as scheduled. As of mid-July, a total of 95 drilled piles (95% completed), 230 steel pipe piles (46.9% completed), 674 high-pressure rotary sprays (17.4% completed) and 124 waterproof curtains (25.3% completed) had been completed.

Photos of the Project:

Site Panorama

Bored pile construction（pouring concrete）

Geological improvement（Construction of high-pressure rotary spraying grouting pile）

Bored pile construction(RCD drilling rig for rock drilling)

Waterproof curtain construction (drilling)

Steel pipe support pile construction(laying steel pipe)