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中国建筑科学研究院研制的成套大直径灌注桩测试设备包括以下几项:1.X—1型沉渣厚度测定仪:沉渣厚度对桩的承载力影响甚大。通过对1300根桩的测试表明,该仪器操作简便,测试误差小于1cm。2.PS—1型孔径测定仪:桩成孔时的扩颈或缩颈,尤其是缩颈会严重降低桩的承载能力。该仪器测量不设加长杆的孔范围为φ100～φ600,加没加长杆的为φ600～φ1200,测量深度大于30m。经133根桩测试表明,该仪器性能可
The large-diameter cast-in-place pile testing equipment developed by the Chinese Academy of Building Research includes the following items: 1. X-1 type sediment thickness gauge: The thickness of the sediment has a great influence on the bearing capacity of the pile. Tests on 1300 piles have shown that the instrument is easy to operate and the test error is less than 1 cm. 2. PS-1 Aperture Tester: The necking or necking when the pile is formed into a hole, especially the necking will seriously reduce the bearing capacity of the pile. The instrument measures the range of holes without extension bar is φ100 ~ φ600, plus no extension bar is φ600 ~ φ1200, measuring depth is greater than 30m. The 133 pile test shows that the instrument performance can be