浙江嵊州-新昌地区红层软岩崩解能量耗散研究

摘要:
以浙江嵊州-新昌地区红层软岩为研究对象, 探究该地区红层软岩崩解表面能特性。基于能量耗散原理, 通过分析该地区3组不同组成成分的红层软岩在干湿循环作用下崩解过程中能量的转化、传递和耗散, 得出红层软岩崩解过程中吸收的能量向表面能转化的规律。结果表明, 该地区红层软岩随着干湿循环次数的不断增多, 表面能累计增长量有3个变化过程: 初期呈平缓增长; 中期表面能急剧增加, 增长速率越来越快; 崩解后期其表面能累计增长量逐渐保持平稳状态。试验还表明黏土矿物含量越高的红层软岩, 产生的表面能越多, 耐崩解性越差。本研究提出的能量耗散模型, 为治理浙江嵊州-新昌地区各种红层软岩问题提供了参考价值。
- 红层软岩 /
- 干湿循环 /
- 崩解现象 /
- 表面能 /
- 能量耗散
Abstract: Objective
This study focused on the surface energy characteristics of red-bed soft rocks during disintegration in the Shengzhou-Xinchang area of Zhejiang Province.
Methods
Based on the principle of energy dissipation, this study analyzed the conversion, transfer, and dissipation of energy during the process of disintegration under dry-wet cycles for three groups of red-bed soft rocks, considering different compositions in the study area. This study aimed to explore the law of energy absorption and transformation into surface energy during the process of red-bed soft rock disintegration.
Results
The results show that the surface energy accumulation of the red-bed soft rock in the study area undergoes three stages with an increasing number of dry-wet cycles: a slow growth stage, a rapid growth stage, and a stable stage. The results also indicate that the higher the content of clay minerals in the red-bed soft rock is, the more surface energy it generates, and the poorer its resistance to disintegration.
Conclusion
The energy dissipation model proposed in this study provides a reference for the governance of various failure problems of the red-bed soft rock in the Shengzhou-Xinchang area of Zhejiang Province.
- red-bed soft rock /
- dry and wet cycle /
- disintegration phenomenon /
- surface energy /
- energy dissipation
注释:

所有作者声明不存在利益冲突。

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图 1 取样现场概况

Figure 1. Overview of the rock sampling site

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图 2 红层软岩崩解形态图

Figure 2. Disintegration morphology of red-bed soft rock

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图 3 3组崩解物各粒径质量分数随干湿循环次数的变化曲线

Figure 3. Variation curve of the percentage content of each disintegration particle size fraction of the three groups of red-bed soft rock with the number of dry-wet cycles

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图 4 3组试样耐崩解指数随干湿循环次数的变化曲线

Figure 4. Variation curve of the disintegration resistance index with the number of dry-wet cycles of the three groups of red-bed soft rock

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图 5 3组红层软岩吸水质量随表面积的关系

Figure 5. Relation ships between the water absorption mass and surface area of the three groups of red-bed soft rock

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图 6 3组红层软岩每次干湿循环表面积增长量变化柱状图

Figure 6. Histogram of surface area growth per wet-dry cycle of the three groups of red-bed soft rock

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图 7 3组红层软岩表面能累计增长量随干湿循环次数的关系

Figure 7. Relationships between the cumulative increase in surface energy of the three groups of red-bed soft rock and the number of dry-wet cycles

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图 8 3组红层软岩表面能累计增长量与耐崩解指数的关系

Figure 8. Relationships between the surface energy accumulation and disintegration resistance indices of the three groups of red-bed soft rocks

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图 9 3组红层软岩崩解能量利用率随干湿循环次数的关系

Figure 9. Relationship between the energy utilization rate and the number of dry-wet cycles of the three groups of red-bed soft rocks

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表 1 岩样矿物成份

Table 1. Mineral composition of the rock samples

岩样编号	蒙脱石	伊利石	石英	钠长石	方解石	微斜长石	赤铁矿	绿泥石	胶结物
岩样编号	φ_B/%								胶结物
A组	21.98	22.05	21.73	10.70	14.08	8.50	0.96	—	泥质为主，少量砂质
B组	18.52	15.81	22.32	24.31	8.71	10.33	—	—	泥质为主，少量砂质
C组	9.98	14.40	51.28	10.57	11.58		—	2.2	砂质为主，泥质次之

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表 2 3组红层软岩不同粒径试样吸水质量

Table 2. Water absorption quality of each particle size of the three groups of red bed soft rocks

粒径/mm	17.3	24.6	30.6	43.8	56.3	72.7	91.6	104.2	112.6	116.2
粒径/mm	吸水质量/g
A组	2.7	3.4	4.2	6.3	14.7	25.5	40.9	60.7	68.9	79.5
B组	1.6	2.5	3.3	5.3	8.1	18.3	33.1	49.9	58.7	65.5
C组	1.5	2.2	2.7	5.2	7.0	12.8	25.2	30.6	41.1	47.4

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