A construction method of homogeneous earth dam and culvert pipe through the dam for contact erosion anti-seepage grouting and detection method of grouting effect

Abstract

The invention relates to a homogeneous earth dam and dam penetrating culvert pipe contact scouring anti-seepage grouting construction method and a grouting effect detection method, and belongs to thetechnical field of the hydro-junction. The detection method comprises the steps that after one week after grouting is finished, a high-density electrical method and other geophysical prospecting methods are used for detecting the continuity situation of a cement wall; then, part of soil mass within the grouting range is excavated for observing of the slurry veins and the lap joint situation between the adjacent slurry veins; and finally, part of the slurry veins are selected, the thickness of the slurry veins is measured, and the seepage resistance of the slurry veins is evaluated. According to the homogeneous earth dam and dam penetrating culvert pipe contact scouring anti-seepage grouting construction method and the grouting effect detection method, a seamless steel pipe is utilized as agrouting floral tube, and a good grouting effect is achieved; and the slurry vein thickness is uniform, the lap joint effect is good, and the slurry vein walking direction is controllable. Meanwhile,the invention provides a method for detecting and assessing the field grouting effect through a field excavation and high-density electrical method combining manner, systematic and quantitative analysis and assessment on the grouting effect can be achieved, and a reliable reference basis is provided for improving the construction technology according to the information fed back according to the grouting effect.

Description

Technical field [0001] The invention belongs to the technical field of water conservancy hubs, and specifically relates to a method for scouring and anti-seepage grouting in contact with a homogeneous earth dam and a culvert pipe passing through the dam and a method for detecting grouting effects. Background technique [0002] The contact leakage damage of a homogeneous earth dam and the culvert pipe that penetrates the dam will cause hazards such as flooding downstream of the dam slope, salinization of the surrounding soil, and even landslide collapse of the dam body. At the same time, it is difficult to detect, sudden damage, and highly harmful. The contact leakage damage between the dam body and the penetrating culvert pipe causes the dam to burst and the resulting safety problems are likely to cause casualties and property losses. [0003] Modern grouting slurry is mainly classified into two categories: cement slurry and chemical slurry. The water content of the cement slurry ...

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Problems solved by technology

[0004] At present, the grouting process is widely used, but in the design of grouting engineering, the calculation of the diffusion radius, the grouting volume and the stone body strength and other parameters mostly rely on empirical formulas, which will cause the difference between the design value and the actual construction parameter value Larger, resulting in material waste, poor engineering effect, and even difficult to guide construction

However, split grouting still has many deficiencies in the anti-seepage treatment of earth dams, mainly reflected in the poor effect of grouting into walls, construction parameters relying on experience and field tests, and the lack of corresponding grouting evaluation indicators, etc.

[0005] Hu Nanqi et al. ("Experimental Research on Anti-seepage Grouting Materials for Composite Cement-Based Earth-rock Dams", Master Thesis of Shandong University) researched the flower tube grouting construction technology, but they did not propose a corresponding evaluation method for the grouting effect, and could not evaluate the final result. Systematic and quantitative analysis and evaluation of the grouting effect; at the same time, the grouting method adopted by it is poor in grouting effect, prone to messy grouting veins, and cannot achieve the original effect of grouting anti-seepage and reinforcement

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