Study on the frost heave mechanism of the water conveyance canal and optimized design of slope protection

Liu, Hailiang; Ma, Donghe; Wang, Changming; Liu, Xiaoyang; Wu, Di; Khan, Kaleem Ullah Jan

doi:10.1007/s10064-021-02447-4

Cited by 17 publications

(3 citation statements)

References 43 publications

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“…Te red-bed soft rock is prone to cracks, swelling, slope collapse, and other problems [6,7], afecting the normal water delivery and operation safety of the water channel. Under long-term operation conditions, the sediment denuded from the channel sidewall is prone to siltation along the way through the fow transportation in the channel, which seriously leads to the elevation of the channel bottom, the increase of the channel width, and the reduction of the berm [8][9][10]. In addition, a large amount of sediment is brought into the reservoir by water fow, resulting in the deterioration of water quality in the reservoir area and afecting the storage capacity and service life of the reservoir [11,12].…”

Section: Introductionmentioning

confidence: 99%

Analysis of Mechanical Properties and Slope Stability of Red Bed Soft Rock: A Case Study in Xinjiang Irrigation Diversion Channel

Gao

Chen

et al. 2022

Advances in Civil Engineering

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The channel slope in the red-bed soft rock area is prone to instability and collapse due to the influence of the channel flow movement, rainfall, weathering, and other factors. Under long-term operation conditions, the sediment stripped from the channel side wall is liable to silt along the process of water flow transportation in the channel, which seriously leads to elevation of the channel bottom, increase of channel width, and reduction of the horseway, which affect the normal water conveyance and operation safety of channels. In view of the collapse and instability of Zhetang diversion irrigation channel project in Xinjiang hydraulic project, through on-site sampling and indoor rock mechanics test, the strength mechanical parameters of slope rock samples are obtained, and the indoor rheological test is carried out, and the triaxial rheological law is obtained. Under different levels of stress, the axial creep strain accounts for more than 50% of the total axial strain, indicating that the rheological effect of sample rock is obvious. Based on the strength parameters of rock samples, a numerical model is established. The stability of red-bed soft rock channel bank slope is studied by using the strength reduction method of finite element method. The seepage field of channel slope under conventional working conditions is analyzed, and the slope stability under different operating conditions is compared and calculated. The results show that the slope stability safety factor of Zhetang diversion irrigation channel slope is 1.60 under conventional working conditions and 1.33 under check working conditions, which are greater than the recommended value in the specification.

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Section: Introductionmentioning

confidence: 99%

Analysis of Mechanical Properties and Slope Stability of Red Bed Soft Rock: A Case Study in Xinjiang Irrigation Diversion Channel

Gao

Chen

et al. 2022

Advances in Civil Engineering

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“…Thus, the canal projects are more prone to slope instability under the coupled action of the WD and FT cycles. In view of this fact, a number of field studies [18,19], physical model tests [20,21], and numerical simulations [22,23] have been carried out on in-depth investigations of the mechanism and instability damage of canal slopes. Rahimi et al statistically evaluated the development law of the cracks and the influencing factors.…”

Section: Introductionmentioning

confidence: 99%

Destabilization Mechanism and Stability Study of Collapsible Loess Canal Slopes in Cold and Arid Regions

Xu,

Zhang,

Shi

2024

Applied Sciences

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The combination of seasonal shutdowns, water conveyance, cold, and drought can easily lead to the deterioration of the anti-seepage system and loess foundation of the canal, which contributes to the destruction of the slope. To reveal the failure mechanism of the collapsible loess canal slope, this paper is based on the results of laboratory tests and adopts numerical simulations to analyze the stability of the canal slope under different conditions. The results show that the shear strength indexes and elastic modulus E of loess decrease following an exponential pattern with the increase in wetting-drying and freezing-thawing (WD-FT) cycles. The height of the seepage overflow point yields little effect on the water level behind the impermeable membrane, whereas the height of the water level has a significant effect. In the operation period, the slope under any working conditions is in a relatively stable state. However, the slope with a water level of 4.5 m behind the impermeable membrane tends to be unstable after three WD-FT cycles during the shutdown period. By replacing the surface-degraded loess with sand gravel and picking a depth of 0.9–1.2 m, the slope will maintain a long-term stable state.

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“…Frost heave is the main factor that can cause severe damage to railways, roads and buildings in seasonally frozen soil regions, decreasing the long-term performance of those infrastructures [1,2]. Considerable efforts have been made to mitigate frost-heave-induced geo-hazards [3,4]. With the propagation of the freezing front (approximately 0 • C) in cold climates, in situ water freezes and external water migrates upwards to feed the growth of the ice lens (frost heave) [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Effect of Anionic Polyacrylamide Polymer on Frost Heave Mitigation and Its Implication for Frost-Susceptible Soil

Wang

et al. 2023

Polymers

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Seasonally frozen ground regions occupy approximately 55% of the exposed land surface in the Northern Hemisphere, and frost heave is the common global problem in seasonally frozen soil areas. Frost heave induces uneven deformation of ground and damages railways, road paving, and buildings. How to mitigate frost heave is the most important technical issue in this field that has provoked great interest. Here, using freezing experiments, we investigate the effect of anionic polyacrylamide (APAM) polymer on frost susceptible soil. The results demonstrate a so-far undocumented inhibition of frost heave by APAM in freezing soil, namely APAM (tested at concentrations from 0.0 wt% to 0.60 wt%) slows down the frost heave by a factor of up to 2.1 (since 0.60 wt% APAM can decrease frost heave from 8.56 mm to 4.14 mm in comparison to the control experiment). Moreover, it can be observed that the maximum water content near the frozen fringe decreased from 53.4% to 31.4% as the APAM content increased from 0.0 wt% to 0.60 wt%, implying a mitigated ice lens growth. Hydrogen bonding between APAM and soil particles triggers an adsorption mechanism that accumulates soil particles, and thus can potentially inhibit the separation and growth of the ice lens. Moreover, the residue of APAM due to hydrogen bonding-induced adsorption in the pores of granular media may narrow seepage channels (capillary barriers) and provide an unfavourable condition for water migration. The use of APAM can also increase the viscosity of the solution, which causes a greater water migration resistance. This research provides new insights into APAM-influenced frost heave (introducing APAM into the soil can induce bridging adsorption between APAM polymer segments and a particle surface), can enable engineers and researchers to utilise chemical improvement design and to consider suitable actions (e.g., by injecting APAM solution into a frost susceptible soil or using APAM-modified soil to replace the frost susceptible soil) to prevent frost heave from having a negative impact on traffic roads and buildings in cold regions.

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Study on the frost heave mechanism of the water conveyance canal and optimized design of slope protection

Cited by 17 publications

References 43 publications

Analysis of Mechanical Properties and Slope Stability of Red Bed Soft Rock: A Case Study in Xinjiang Irrigation Diversion Channel

Analysis of Mechanical Properties and Slope Stability of Red Bed Soft Rock: A Case Study in Xinjiang Irrigation Diversion Channel

Destabilization Mechanism and Stability Study of Collapsible Loess Canal Slopes in Cold and Arid Regions

Effect of Anionic Polyacrylamide Polymer on Frost Heave Mitigation and Its Implication for Frost-Susceptible Soil

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