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BEIJING, May 14 (Xinhua) — Chinese President Xi Jinping called for renewing the Silk Road spirit when addressing a banquet held Sunday evening in honor of foreign guests attending the Belt and Road Forum for International Cooperation. Before the banquet, Xi and his wife Peng Liyuan greeted the guests at the Great Hall […]
BEIJING, May 14 (Xinhua) — Chinese President Xi Jinping on Sunday stressed Indonesia’s special connection with the 21st Century Maritime Silk Road, calling on the two countries to strengthen cooperation under the framework of the Belt and Road Initiative. “I proposed the 21st Century Maritime Silk Road for the first time when I […]
The load cell (jacks) is a specialized pressure cell that is attached to the reinforcement cage, and placed at the bottom or in the lower part of the drilled shaft. It has a hydraulic line extending from the cell to the top. After placement of the reinforcement cage, the hole is filled with concrete. […]
The rebar strain meters are used for the purpose of measuring concrete strains due to imposed load. With sufficient rebar strain meters, axial load distribution along the drilled shaft can be determined. The skin friction of different soil layers and end bearing capacity can be determined, too. The rebar strain meters are designed to […]
Data collection and load control instrument (DCLC) is designed to collect data and apply load automatically during the load test. DCLC records the load applied at the load cell, the displacement of upper and lower plate of the load cell, the displacement of the pile top, and the strains of rebar strain meters. Based […]
Bi-directional static load testing is an innovative pile testing method. In the US, The test is also known as O-cell load test, which is named after Prof J. Osterberg. In China, the test is developed by Prof. Gong Weiming, and is known as self-balance load test. One or more hydraulically pressure load cells are used […]
Low strain integrity testing (also known as low strain dynamic test, sonic echo test) is a non-destructive pile testing method for integrity assessments of drilled shafts or driven concrete piles. The test is performed with a hand held hammer, a sensitive accelerometer and the Pile Integrity Tester (PIT). The accelerometer is attached […]
Crosshole Sonic Logging (CSL, also known as Crosshole Acoustical Testing) checks the integrity of drilled shafts. It normally requires steel or PVC access tubes installed during the construction of the drilled shafts. These tubes are usually attached to the reinforcement cage along the full length of the shafts. The cage is then lowered into […]