CN-122013796-A - Brick residue recycling side slope self-water-replenishing ecological slope protection system and method

CN122013796ACN 122013796 ACN122013796 ACN 122013796ACN-122013796-A

Abstract

The invention relates to the technical field of slope ecological protection, and discloses a brick residue recycling slope self-water replenishing ecological slope protection system and a brick residue recycling slope self-water replenishing ecological slope protection method. The core of the invention is to construct an 'endogenous moisture circulation system' by utilizing the porous physical characteristics of the construction waste brick slag and manually manufacturing a matrix suction gradient by precisely regulating and controlling the particle size gradient (10 < -30 > mm to less than or equal to 5 mm) of each layer. Experiments prove that the effective capillary rise height H of the system is more than or equal to 0.5m, the active compensation of moisture in drought period can be realized, and more than 80% of instant rainfall is trapped. The invention not only greatly improves the recycling utilization rate (> 80%) of the construction waste, but also solves the problem that the common slope maintenance relies on the industry pain point of manual irrigation, and has remarkable ecological benefit and economic benefit.

Inventors

LAI XIAOFENG
WANG XINXIN
Ban Zijun
XIA YANYAN
DU CHAOWEI
WANG JUNCHAO
LI MINGYUE
ZHENG YUANXUN
YE YUSHAN
WANG SHAOQIANG
HU HUANZHANG

Assignees

河南交通投资集团有限公司濮鲁项目部
郑州大学

Dates

Publication Date: 20260512
Application Date: 20260310

Claims (10)

1. A brick residue recycling side slope self-water replenishing ecological slope protection system is characterized by comprising a flexible constraint structure paved on the surface of a side slope original soil body, a graded brick residue water storage cushion layer filled in the flexible constraint structure, a fiber water guide composite layer covered on the water storage cushion layer, and a plant growth covering layer positioned at the outermost side, wherein a continuous capillary communication network is formed between the fiber water guide composite layer and the fiber water guide composite layer through the grain size grading difference, and water is driven to autonomously migrate and circulate in the system based on interlayer matrix suction gradient.
2. The brick residue recycling side slope self-water replenishing ecological slope protection system according to claim 1, wherein the grading brick residue water storage cushion layer is composed of brick residue particles with the particle size of 10-30mm, and the porosity of the brick residue water storage cushion layer is controlled to be 30% -45% and is used as a main structural layer for storing gravity water.
3. The brick residue recycling side slope self-water replenishing ecological slope protection system according to claim 1, wherein the fiber water guiding composite layer is formed by mixing fine-particle brick residues, hydrophilic fibers and super absorbent resin according to a preset proportion, wherein the particle size of the fine-particle brick residues is not more than 5mm, and the mass ratio of the fine-particle brick residues is not less than 60% of the total mass of the composite layer.
4. The brick residue recycling side slope self-water replenishing ecological slope protection system according to claim 1, wherein the hydrophilic fibers form bundle-shaped distribution in the water guide composite layer, so that the effective capillary rise height H of the system is more than or equal to 0.5m.
5. The brick residue recycling side slope self-water replenishing ecological slope protection system according to claim 1, wherein the vegetation cover layer consists of modified brick residue nutrient soil, wherein the mass ratio of brick residue powder is 40% -50%, and the pH value is controlled to be 6.5-7.5.
6. The brick residue recycling side slope self-water replenishing ecological slope protection system according to claim 1, wherein the flexible constraint structure is a geocell or a light interlocking ecological brick and is reliably connected with a side slope in-situ soil body through an anchoring assembly.
7. The brick slag recycling side slope self-water replenishing ecological slope protection system according to claim 1, wherein a contact interface between the fiber water guide composite layer and the graded brick slag water storage cushion layer is compacted to promote fine particle materials to be embedded into gaps of the brick slag with large particle size below, so that a continuous and stable water potential gradient conduction channel is established.
8. A construction method of the brick residue recycling side slope self-water replenishing ecological slope protection system as set forth in any one of claims 1 to 7, characterized by comprising the steps of: step one, slope surface treatment, namely cleaning and trimming the surface layer of the primary soil body of the slope; step two, installing a structure, namely paving and fixing the flexible constraint structure on the processed slope; Step three, cushion construction, namely layering and filling graded brick residue water storage cushion layers in the flexible constraint structure, and controlling the thickness of the graded brick residue water storage cushion layers to be in a range of 150-200 mm; Paving a water guide layer, namely paving a fiber water guide composite layer on the water storage cushion layer, controlling the thickness of the fiber water guide composite layer to be in a range of 80-120mm, and ensuring that an effective capillary communication network is formed between the two layers through technological measures; And fifthly, planting and curing, seeding after covering the planting cover layer, and implementing subsequent curing.
9. The method of claim 8, wherein in step four, after the fiber-water-conducting composite layer is laid, atomizing and spraying water is performed to induce expansion of the super absorbent resin in the composite layer, thereby sealing large ineffective voids in the layer and enhancing the overall capillary pumping effect of the system.
10. The method according to claim 8, wherein in the fifth step, the surface of the plant growth covering layer is covered with a biodegradable film for preserving soil moisture after sowing until the plant seedlings survive and the root system of the plant seedlings can penetrate through the fiber water guiding composite layer and penetrate into the graded brick residue water storage cushion layer.

Description

Brick residue recycling side slope self-water-replenishing ecological slope protection system and method Technical Field The invention relates to the technical fields of slope protection and solid waste resource utilization, in particular to a common slope self-water replenishing ecological slope protection system for constructing endogenous water circulation through a matrix suction gradient by utilizing the porous characteristic of building waste brick residues and a construction method. Background Along with the large-scale promotion of infrastructure construction such as traffic, mine, etc., the distribution scope of highway side slope, railway side slope and mine side slope continues to enlarge, and this kind of side slope generally faces the outstanding problem that the maintenance degree of difficulty is big. The core pain points are concentrated on the two aspects of extremely low interception utilization rate of natural rainfall, rapid runoff loss of most rainwater and incapability of providing stable water supply for slope vegetation growth, and high investment of a large amount of manpower and material resources for manual irrigation and long-term maintenance cost, so that the sustainability of slope ecological restoration is severely restricted. Meanwhile, mass building rubbish brick residues are generated in the process of removing transformation and engineering construction, the traditional disposal mode of solid wastes is mainly backfilled, and although the waste is absorbed to a certain extent, the inherent excellent characteristics of the solid wastes, namely the water storage capacity given by a porous structure and the water conduction function brought by capillary pores, cannot be fully exerted, so that high-quality resources are utilized inefficiently, the resource waste is caused, and an effective solution cannot be provided for the slope maintenance problem. In the existing slope water retention technology, the technology either depends on traditional irrigation facilities, has the problems of high cost and high energy consumption, or adopts common water storage materials, lacks the synergistic effect of efficient water storage and conduction, and is difficult to realize 'water supply on demand'. The porous water storage and capillary conduction characteristics of the building rubbish brick slag just meet the core requirements of water retention of the side slope, but a mature technical system is not formed at present, and the building rubbish brick slag is converted into a composite system with the water storage function of a water storage reservoir and the water delivery function of a capillary pump. Therefore, development of a slope ecological restoration composite system based on building rubbish brick residues is needed, the resource potential of the system is fully excavated, the technical pain points with low slope rainfall interception rate and high manual irrigation cost are broken, and the maintenance cost in the later period of ecological restoration is reduced. The existing slope ecological restoration method has the technical bottlenecks that water supply is lack of continuity in drought period, manual irrigation is relied on, long-term maintenance cost is high, a large amount of brick residues generated by building demolition are not effectively utilized in a recycling mode, accumulation occupies land and has environmental risks, and the existing slope protection structure is complex in construction and poor in adaptability to slope topography and soil conditions. Disclosure of Invention The invention aims to provide an integrated solution to synchronously realize the autonomous circulation supply of water and the high-value utilization of building brick residues and improve the convenience and universality of construction. Therefore, the invention provides a brick residue recycling side slope self-water replenishing ecological slope protection system. The system comprises a flexible constraint structure paved on a slope surface of a side slope from bottom to top, a water storage cushion layer filled in the flexible constraint structure and composed of graded brick residues, a fiber water guide composite layer covered on the water storage cushion layer, and a plant growth covering layer positioned on the outermost layer. The core is that the water storage cushion layer has high porosity and is mainly used for infiltration and storage of gravity water formed by rainfall. The fiber water-guiding composite layer forms a developed micro-pore structure by doping hydrophilic fibers and super absorbent resin, and generates high matrix suction force. The water storage cushion layer and the water guide composite layer form a hydraulically continuous capillary communication network through the grain size grading difference. Based on this structure, during drought periods, when the water consumption of the vegetation cover layer results in a decrease in water potential, a significa