大瑞铁路高黎贡山越岭段主要工程地质问题与地质选线

李光伟; 杜宇本; 蒋良文; 郭长宝; 沈维; 刘筱怡

大瑞铁路高黎贡山越岭段主要工程地质问题与地质选线

1.
中国铁路总公司工程设计鉴定中心, 北京 100844
2.
中铁二院工程集团有限责任公司, 成都 610031
3.
中国地质科学院地质力学研究所, 北京 100081

基金项目:

铁道部科技研究开发计划项目 2008G027-A

铁道部科技研究开发计划项目 2008G027-B

铁道部科技研究开发计划项目 2008G027-C

铁道部科技研究开发计划项目 2008G027-D

详细信息

作者简介:
李光伟, 男, 高级工程师, 主要从事铁路水文地质与工程地质调查研究与技术咨询工作。E-mail:fknl119@sina.com

中图分类号: TU452
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- 文章访问数: 181
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- 被引次数: 0
出版历程
- 收稿日期: 2014-10-14
- 刊出日期: 2015-03-01

RESEARCH ON THE ENGINEERING GEOLOGY CONDITION AND RAILWAY ROUTES COMPARISON ALONG THE Mt. GAOLIGONG SECTION, DALI-RUILI RAILWAY

1.
The Engineering Design Appraisal Center of China Railway Corporation, Beijing 100844, China
2.
China Railway Eryuan Engineering Group Co. Ltd., Chengdu, Sichuan 610031, China
3.
Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081, China

摘要

摘要: 在野外地质调查、钻探、地应力测量和室内测试分析的基础上, 对大瑞铁路高黎贡山越岭段规划设计中可能遇到的高地温、高地应力、活动断裂断错、岩爆、涌水突泥、软岩大变形和边坡稳定性等主要工程地质问题进行了论述, 认为高地温和热害是制约高黎贡山深埋隧道段建设的关键因素。根据地热钻探、测试资料分析, 该区的地热分布受断裂构造控制明显, 黄草坝断裂具有阻水隔热的工程地质特性。对比分析认为, C12K方案(34.5 km越岭长隧道方案)位于黄草坝阻水隔热断层之南, 通道内相对低温, 且在隧道口处避让了古滑坡等不利工程地质问题, 在众多比选方案中工程地质条件较好。调查研究结果对大瑞铁路全线贯通具有重要意义。
- 大瑞铁路 /
- 高黎贡山 /
- 工程地质问题 /
- 地质选线 /
- 线路方案
Abstract: Based on the field geological investigation, drilling, in-situ stress measurement and lab test analysis, this paper illustrates the main engineering geological problems that could be encountered in the Mt. Gaoligong section railway planning and construction, such as high geo-temperature, high geo-stress, active fracture dislocation, rock burst, water pouring out and mud squirting, large deformation of the soft rock, landslide, and so on. The paper deems that the high geo-temperature and thermal harm are the key factors restricting the Mt. Gaoligong deep-buried tunnel section. According to geothermal drilling and lad test results analysis, the geothermal distribution is obviously controlled by the geology structure, and the Huangcaoba fault has the engineering geology of block water and heat insulation. Based on comprehensive comparative analysis, the C12K scheme (34.6 km long tunnel scheme) is a better scheme, located in the relatively low geothermal channel, south of the Huangcaoba fault, and this scheme has avoided some unfavorable engineering geological problems such as the ancient landslide at the tunnel entrance. The survey and research results have great importance for the landslide optimization and further design.
- Dali-Ruili railway /
- Mt. Gaoligong /
- engineering geological problem /
- geological route selection /
- route scheme

HTML全文

图 1 大瑞铁路高黎贡山越岭段及邻区活动断裂与地质构造分布

Figure 1. The geological tectonic distribution map in Mt. Gaoligong section along Dali-Ruili railway

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图 2 大瑞铁路高黎贡山越岭段主要断裂分布

Figure 2. The active faults distribution map in Mt. Gaoligong section along Dali-Ruili railway

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图 3 大瑞铁路高黎贡山深埋隧道工程地质剖面

1－泥岩；2－粉砂岩；3－泥质粉砂岩；4－细砂岩；5－粗砂岩；6－杂砂岩；7－长石砂岩；8－长石石英砂岩；9－砂砾岩；10－砾岩；11－灰岩；12－泥质灰岩；13－砂质灰岩；14－白云岩；15－砂质白云岩；16－泥质板岩；17－砂质板岩；18－变质砂岩；19－千枚状板岩；20－石英片岩；21－片岩；22－大理岩；23－玄武岩；24－花岗岩(斑岩)；25－断裂；26－钻孔

Figure 3. Engineering geological section of the Mt. Gaoligong deep-buried tunnel

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图 4 龙陵邦腊掌温泉特征(泉口温度102 ℃)

Figure 4. Characteristics of Banglazhang hot spring in Longling County

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图 5 隧道附近部分钻孔实测地应力特征

Figure 5. Characteristics of the crustal stress test results in Mt. Gaoligong section along Dali-Ruili railway

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图 6 CZ-G-14钻孔蚀变岩芯照片

Figure 6. Photo of the altered rock in the Drill CZ-G-14

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图 7 怒江左岸等子滑坡

(镜向东)

Figure 7. Dengzi landslide at the left side of Nujiang

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图 8 大瑞铁路高黎贡山越岭地段地温带分布

Figure 8. The ground temperature belt distribution map in Gaoligong Mt. section along Dali-Ruili railway

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图 9 大瑞铁路高黎贡山越岭隧道层面地温等值线图

Figure 9. Ground temperature contour map on the tunnel plane in Gaoligong Mt. section along Dali-Ruili railway

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表 1 地温带划分、热害分析评估标准

Table 1. The temperate zone, heat damage evaluation standard table

地温带		温度界限T/℃	热害分析评估标准
常温带		≤28	无热害
低高温带(Ⅰ)		28＜T≤37	热害轻微
中高温带(Ⅱ)	中高温带(Ⅱ₁)	37＜T≤50	热害中等
中高温带(Ⅱ)	中高温带(Ⅱ₂)	50＜T≤60	热害较严重
超高温带(Ⅲ)		＞60	热害严重

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表 2 高黎贡山比选方案隧道地质条件综合对比

Table 2. Comprehensive geological condition comparison for alternative schemes along Mt. Gaoligong deep-buried tunnel section

比选内容			C12K	CK	C4K	C1K	C10K	C5K	C22K
地热地质条件	隧道路肩面温度所占比例/%	常温带	63.90	36.90	39.60	27.60	近100	-	100
		低高温带(Ⅰ)	34.10	61.10	32.10	23.80	无	-	无
		中高温带(Ⅱ₁)	2.0	2.0	20.45	39.02	无	-	无
		中高温带(Ⅱ₂)	无	无	7.10	6.75	无	-	无
		高温带(Ⅲ)	无	无	0.75	2.83	无	-	无
	地温梯度(℃/100 m)		1.68	1.78	3.66	3.91	-	-	-
	热流值/(mW·m^-2)		29.2~52.2	30.9~52.2	52.5~190	52.5~190	-	-	-
	岩温产热率(10^-2 J/m²·s)		2.4~4.3	3.0~3.5	3.0~6.4	6.5~12.0	-	-	-
隧道地热地质条件			位于相对低温通道	位于相对低温通道	穿越高地温地区，龙陵隧道进口地段高温热害严重	穿越高地温地区，龙陵隧道进口地段高温热害严重	线路多以路基、桥通过，避免了隧道高地温危害	穿越高地温地区，隧道热害严重	线路多以路基、桥通过，避免了隧道高地温危害
断裂构造			线路大角度与断裂构造大角度相交	线路大角度与断裂构造大角度相交	高黎贡山隧道位于断裂构造蜂腰部位，引线段与构造线平行	高黎贡山隧道位于断裂构造蜂腰部位，引线段与构造线平行	在断裂构造密集地区迂回展线	引线段与断裂构造平行	在断裂构造密集地区迂回展线
不良地质			绕避	引线段不良地质发育	引线段不良地质发育	不良地质发育	不良地质发育	不良地质发育	不良地质发育
工程地质条件评价			较好	好	差	差	差

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