水泥—水玻璃双液注浆在黄土隧道施工中的应用

杨晓华, 俞永华

中国公路学报 ›› 2004, Vol. 17 ›› Issue (2) : 68-72.

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中国公路学报 ›› 2004, Vol. 17 ›› Issue (2) : 68-72.
论文

水泥—水玻璃双液注浆在黄土隧道施工中的应用

  • 杨晓华, 俞永华
作者信息 +

Application of cement-silicate double solution grouting in loess tunnel construction

  • YANG Xiao-hua, YU Yong-hua
Author information +
文章历史 +

摘要

针对黄土隧道进出口段的黄土层在与基岩交界附近为饱和黄土, 围岩强度低, 自稳能力差, 施工难度大的现状, 在室内测定了水泥—水玻璃浆液不同配比和不同温度情况下的胶凝时间及浆液结石体抗压强度的基础上, 通过现场注浆试验, 对水泥—水玻璃浆液配比、注浆压力、浆液扩散半径等技术参数和注浆工艺进行了研究。结果表明:在黄土隧道施工中, 水泥—水玻璃双液注浆参数为:水玻璃模数M=2.8~3.1, 水玻璃溶液浓度Be′=35~40, 水泥浆水灰比W/C=0.75:1~1.0:1(重量比), 水泥浆:水玻璃=1:0.5~1:1.0(体积比), 注浆压强为0.6~3.5 MPa, 浆液扩散半径为0.5~1.3 m。工程实践说明:采用水泥—水玻璃双液注浆方法加固黄土隧道进出口段的饱和黄土可以取得较好的效果。

Abstract

Against the current status for the loess tunnel with saturated loess around the rock in the gate of loess tunnel that the strength of surrounding rock is low and the ability in self-support is bad and the construction is very difficult, on the basis of measuring the gelation time of cement-silicate grout and compression strength of grout binder at different mixture ratio and temperature in the laboratory, authors research the technical parameters by the field grouting test, such as mixture ratio, grouting pressure, diffusion radius of grout and grouting technology. The results show that parameters of cement-silicate double solution grouting are suggested as follows, at the construction of loess tunnel: silicate modulus M=2.8~3.1; silicate liquor strength Be′=35~40; water-cement ratio W/C=0.75:1~1.0:1(ratio by weight); cement-silicate ratio is 1:0.5~1:1.0(ratio by volume);grouting pressure is 0.6~3.5 MPa;diffusion radius of grout is 0.5~1.3 m. The engineer practice shows that the method of cement-silicate grouting can be achieved good effect for reinforcing the saturated loess in the gate of loess tunnel.

关键词

隧道工程 / 水泥—水玻璃双液注浆 / 现场试验 / 注浆参数 / 注浆工艺

Key words

tunnel engineering / cement-silicate double solution grouting / field test / grouting parameter / grouting technology

引用本文

导出引用
杨晓华, 俞永华. 水泥—水玻璃双液注浆在黄土隧道施工中的应用[J]. 中国公路学报, 2004, 17(2): 68-72
YANG Xiao-hua, YU Yong-hua. Application of cement-silicate double solution grouting in loess tunnel construction[J]. China Journal of Highway and Transport, 2004, 17(2): 68-72
中图分类号: U455.49   

参考文献

[1] 王星华.粘土固化浆液在地下工程中的应用[M].北京:中国铁道出版社, 1998.80-82.
[2] 龚晓南.地基处理手册(第二版)[M].北京:中国建筑工业出版社, 2000.307-316.
[3] 程鉴基.水泥-水玻璃在珠江三角洲软土灌浆中的应用[J].岩土工程学报, 1996, 14(4):80-83.
[4] BADER T A, KRIZEK R J.Injection and distribution of silicate grout in sand[A]. Proc.of the Conference on Grouting in Geotechnical Engineering[C].New York:American Society of Civil Engineers, 1982.540-563.
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