CAJ | 학술논문

应用大刚度、长标距、大量程的 SDW-100型位移传感器，采用500 kN/m 高强有纺土工布进行室内试验和现场试验，研究高强土工布加筋垫层的变形情况。室内拉伸试验成果表明，位移传感器在每级加荷情形下的变形量与试验机上显示变形量具有较好的一致性，说明该类型传感器用于现场加筋高强土工布的变形测试是适用的，并因此得到高强有纺土工布的变形模量为8314.4 kN/m。现场试验表明，(1)大堤底部的土工布位移曲线基本表现为盆形，中轴线下的土工布位移量最大；(2)大堤下部土工布的位移量大小与外棱体的位移方向明显相关；(3)现场试验中高强土工布的最大实测变形率为11.9%，按室内试验得到的变形模量计算出该计算高强有纺土工布的应力值为837.40 kN/m，表明按照现场实际加荷速率设计的高强有纺土工布强度值偏小；(4)施工间歇期高强土工布的应力会出现重分布现象，具体表现为大堤轴线下变形量明显减小，现场实测成果与 Plaxis 有限元计算成果规律性吻合情况较好，试验成果符合一般规律；(5)土工布的变形率与围堤上部现场施工加荷的速率关系很大，现场施工时设计单位应当提出一个加荷速率控制值；(6)当高强有纺土工布的强度一定时，土工布的伸长率相对较大有利于快速加荷施工。
응용대강도、장표거、대량정적 SDW-100형위이전감기，채용500 kN/m 고강유방토공포진행실내시험화현장시험，연구고강토공포가근점층적변형정황。실내랍신시험성과표명，위이전감기재매급가하정형하적변형량여시험궤상현시변형량구유교호적일치성，설명해류형전감기용우현장가근고강토공포적변형측시시괄용적，병인차득도고강유방토공포적변형모량위8314.4 kN/m。현장시험표명，(1)대제저부적토공포위이곡선기본표현위분형，중축선하적토공포위이량최대；(2)대제하부토공포적위이량대소여외릉체적위이방향명현상관；(3)현장시험중고강토공포적최대실측변형솔위11.9%，안실내시험득도적변형모량계산출해계산고강유방토공포적응력치위837.40 kN/m，표명안조현장실제가하속솔설계적고강유방토공포강도치편소；(4)시공간헐기고강토공포적응력회출현중분포현상，구체표현위대제축선하변형량명현감소，현장실측성과여 Plaxis 유한원계산성과규률성문합정황교호，시험성과부합일반규률；(5)토공포적변형솔여위제상부현장시공가하적속솔관계흔대，현장시공시설계단위응당제출일개가하속솔공제치；(6)당고강유방토공포적강도일정시，토공포적신장솔상대교대유리우쾌속가하시공。
By using the data acquired from laboratory and field monitoring program, this study assessed the displacements of high-strength geotextile used as basal reinforcement of a closing levee. The displacements of the geotextile were monitored by high stiffness, large gauge length and measuring range SDW-100 displacement transducers with 500 kN/m high-strength woven geotextile .The transducers were first calibrated in a multi-function test machine. The tensile test of the geotextile yielded a tensile stiffness of 8314.4 kN/m. The field monitoring data indicate that: (1) The displacements of the geotextile at the base of the closing levee showing a concave shape and maximum displacement occurred along the center line. (2) The displacements of the geotextiles is explicitly influenced by the movement of the attached toe-berms. (3) The measured maximum strain is 11.9% which is equivalent to 837.40 kN/m in tension. The high strain indicates that the geotextile with higher tensile stiffness should be used. (4) The stress redistribution between the stages of the construction is observed. This phenomenon is further verified by numerical simulation using Plaxis. (5) The strain of the geotextile is a function of the closing levee backfilling rate. An appropriate backfilling rate should be selected to limit the strain in geotextile. (6) With the same tensile strength, the larger elongation can accommodate faster construction.