This project was the foundation treatment construction of the rear land yard, with the total
construction area of 424,563m2. According to the site geological conditions, the
construction site was divided into 6 zones. It was started on November 9, 2012 and completed
on December 1, 2013.
The project used point ramming twice and full ramming once. The energy
of point ramming can be 2,000kN.m-3,000kN.m. The space between tamping points is 4.5-5.5m, square
layout, 12 hits. The full ramming capacity can be 1,000kN.m, 2 hits, hammer mark lap 1/4 hammer
base area. After testing, the bearing capacity and settlement meet the design requirements.
The project is located in the middle part of the coastline of Liaodong Peninsula and Bohai Seaside of Dalian, with a total ground improvement area of about 2,610,000m2 behind the berths. It included Phase I of the General Miscellaneous Wharf project in Taiping Bay Port Area (104#-108# General Miscellaneous berths) and the General Miscellaneous Wharf project in Taiping Bay Port Area (supporting works in the port area). The construction began in 2016 and is currently under construction.
Tangshan LNG project is the first LNG project in North China. The receiving station of this project mainly consists of 4 LNG full capacity storage tanks with a storage of 160,000 cubic meters and their supporting structures. The site is treated by dynamic compaction. The grouting reinforced concrete bored pile at the end of pile is adopted for pile foundation. The foundation treatment started on September 10, 2009 and was completed on February 25, 2010. The bored pile started on May 20, 2010 and was completed on December 04, 2010.
Foundation dynamic compaction: tamping energy is 2,000kN.m to 12,000kN.m; after treatment, the
foundation bearing capacity reaches 120kPa-250kPa, and the foundation treatment area is 331,243m2.
Bored pile: The pile diameter is 1.20m, the pile length is 70m, and the construction technology of
rotary digging hole pile is adopted. The high-cap piles are exposed to the ground by 1.7-2.0m, and the
above-ground piles adopt traditional secondary pouring technology. The two storage tanks total 720,
with a concrete volume of 63,000m3.
Tank #1: low strain testing, 98.6% of type I piles, 1.4% of type II piles; ultrasonic testing,
100% of type I piles. The limit value of the vertical compressive bearing capacity of a single pile
meets the design requirements. Tank 3#: low strain testing, 97.5% of type I piles, 2.5% of type II
piles, ultrasonic testing, 100% of type I piles. The ultimate value of the vertical compressive
bearing capacity of the four engineering piles meets the design requirements.
