CFRP加筋中砂的试验研究

Experimental Study of Medium Sand Reinforced with CFRP

采用碳纤维增强塑料(CFRP)作为加筋材料,研究加筋后中砂的承载能力.采用固结不排水三轴试验.试验中考虑了试件加筋层数、加筋形式、围压这3种因素对中砂承载能力的影响.试验采用中号试样,试样直径61.8 mm,试样高度150 mm.试验表明,中砂试样采用CFRP加筋后,明显增加了中砂试样的强度且减小了中砂试样的变形;而且随着围压的增大,加筋试样的强度增加率会降低.

The bearing capacity of medium sand, which was reinforced with carbon fabrics reinforced plastics （CFRP）, was studied. The test method was consolidated and undrained triaxial-test. The effects of the three factors on the bearing capacity of medium sand was taken into account, such as reinforcement-layers, reinforcement-forms and cell pressure. The medium-size test piece was adopted, which was 61.8 mm in diameter and 150 mm in height. The results showed that, when the test piece of medium sand was reinforced with CFRP, its strength increased and its deformation decreased obviously. In addition, with the increment of cell pressure, the increment rate of strength reduced.