Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Formula for controlling springback of sprayed concrete
The invention discloses a formula for controlling springback of sprayed concrete, and the sprayed concrete comprises the following materials: 45%-55% of gravel, 424kg/m < 3 >-464kg/m < 3 > of cement, 0.39-0.43 of water-cement ratio, and 0.08%-0.12% of additives: polypropylene fiber, chopped basalt fiber and ultra-high performance synthetic fiber. The method comprises the following steps: step 1, controlling various data such as a sand-gravel ratio, a cement mixing amount, an additive mixing amount, a water-binder ratio and the like by adopting an indoor test mode, and recording a sprayed concrete rebound rate caused when the proportion of each influence factor is changed; the deformation mechanism and stability analysis of the tunnel supporting structure are researched by combining field monitoring measurement data and numerical simulation analysis, the technical problems of serious tunnel overexcavation and high springback loss of sprayed concrete are solved to a large extent, and great social and economic, production practice and scientific research academic values are achieved.
本发明公开了控制喷射混凝土回弹的配方，喷射混凝土的材料配比如下：砂石率：45％‑55％，水泥掺量：424kg/m3‑464kg/m3，水灰比：0.39‑0.43，外加剂种类：聚丙烯纤维、短切玄武岩纤维、超高性能合成纤维，外加剂掺量：0.08％‑0.12％，包括以下步骤：步骤一：首先采用室内试验的方式对砂石比、水泥掺量、外加剂掺量、水胶比等各项数据进行控制，并记录每个影响因素的占比变化时，引起喷射混凝土回弹率，本发明通过结合现场监控量测数据与数值模拟分析研究隧道支护结构的变形机理与稳定性分析，较大程度上解决隧道超挖严重和喷射混凝土回弹损耗高的技术难题，具有极大的社会经济、生产实践、科研学术价值。
Formula for controlling springback of sprayed concrete
The invention discloses a formula for controlling springback of sprayed concrete, and the sprayed concrete comprises the following materials: 45%-55% of gravel, 424kg/m < 3 >-464kg/m < 3 > of cement, 0.39-0.43 of water-cement ratio, and 0.08%-0.12% of additives: polypropylene fiber, chopped basalt fiber and ultra-high performance synthetic fiber. The method comprises the following steps: step 1, controlling various data such as a sand-gravel ratio, a cement mixing amount, an additive mixing amount, a water-binder ratio and the like by adopting an indoor test mode, and recording a sprayed concrete rebound rate caused when the proportion of each influence factor is changed; the deformation mechanism and stability analysis of the tunnel supporting structure are researched by combining field monitoring measurement data and numerical simulation analysis, the technical problems of serious tunnel overexcavation and high springback loss of sprayed concrete are solved to a large extent, and great social and economic, production practice and scientific research academic values are achieved.
本发明公开了控制喷射混凝土回弹的配方，喷射混凝土的材料配比如下：砂石率：45％‑55％，水泥掺量：424kg/m3‑464kg/m3，水灰比：0.39‑0.43，外加剂种类：聚丙烯纤维、短切玄武岩纤维、超高性能合成纤维，外加剂掺量：0.08％‑0.12％，包括以下步骤：步骤一：首先采用室内试验的方式对砂石比、水泥掺量、外加剂掺量、水胶比等各项数据进行控制，并记录每个影响因素的占比变化时，引起喷射混凝土回弹率，本发明通过结合现场监控量测数据与数值模拟分析研究隧道支护结构的变形机理与稳定性分析，较大程度上解决隧道超挖严重和喷射混凝土回弹损耗高的技术难题，具有极大的社会经济、生产实践、科研学术价值。
Formula for controlling springback of sprayed concrete
控制喷射混凝土回弹的配方
FENG XIAONING (Autor:in) / YANG FAN (Autor:in) / XU GAOHE (Autor:in) / XI KANGLI (Autor:in) / CAO JUN (Autor:in) / XU HONGLIU (Autor:in) / DU YAOHUI (Autor:in) / GAO YUE (Autor:in) / ZHOU FEI (Autor:in) / ZHANG MINGFU (Autor:in)
16.11.2021
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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