新型水下聚凝充填材料配合比及力學性能試驗研究*

阮艷妹¹，羅旭¹，盧曉智¹，梅源^2,3 

(1.廣州地鐵設計研究院股份有限公司，廣東 廣州 510010；2.西安建筑科技大學土木工程學院，陜西 西安 710055；3.陜西省巖土與地下空間工程重點實驗室，陜西 西安 710055)

［摘要］為了配制既滿足工作性能又能達到基本力學性能要求的新型水下聚凝充填材料（NWC-FM），從盾構泥入手，用X射線、掃描電鏡（SEM）和光學顯微鏡分析其微觀形貌、孔徑分布及宏觀性能，基于此初步確定5組配合比，并通過力學性能試驗進行驗證。結果表明，NWC-2組試塊彈性模量最大，抵抗變形的能力最大；NWC-2組試塊峰值應力最大，為10.25MPa，NWC-4組試塊峰值應力次之，為7.76MPa，NWC-5組試塊峰值應力最小，為2.462MPa。經分析調整，選取NWC-5組作為最優配合比，且滿足配制要求。

［關鍵詞］水下聚凝充填材料；配合比；力學性能；抗壓強度；微觀

［中圖分類號］TU528     ［文獻標識碼］A      ［文章編號］1002-8498(2021)04-0083-04

Experimental Research on the Mixing Ratio and Mechanical Properties of New Type of Underwater Coagulant Filling Material

RUAN Yanmei¹, LUO Xu¹, LU Xiaozhi¹, MEI Yuan^2,3 

(1.Guangzhou Metro Design & Research Institute Co., Ltd., Guangzhou, Guangdong 510010, China; 2. College of Civil Engineering, Xi’an University of Architecture and Technology, Xi’an,  Shaanxi 710055, China; 3. Shaanxi Key Lab of Geotechnical and Underground Space Engineering (XAUAT), Xi’an, Shaanxi 710055, China)

Abstract: In order to make both can satisfy the working performance and can meet the requirements of basic mechanical properties of a new type of under water coagulant filling material, this article obtains from the shield of mud, with X-ray phase analysis (X-ray diffraction, XRD), scanning electron microscopy (SEM) and optical microscope analyses the microscopic morphology, pore size distribution and the performance of the macro analysis. Based on this, the five sets of mix ratios were preliminarily determined and verified by mechanical performance tests. The results show that the elastic modulus of NWC -2 test is the largest, and the ability to resist deformation is the largest. The maximum peak stress of NWC -2 test is 10.25 MPa, followed by 7.76 MPa for NWC -4 test, and 2.462 MPa for NWC -5 test. Through analysis and adjustment, NWC-5 group is selected as the optimal mix ratio, and meets the requirements of the preparation.

Keywords:underwater coagulant filling material; mix ratio; mechanical properties; compressive strength; micro

* 陜西省重點研發項目（2020SF-373）

［作者簡介］阮艷妹，高級工程師，Email：37763986@qq.com