CN-121994788-A - Plant root system growth condition monitoring device in rock crack

Abstract

The application discloses a device for monitoring growth conditions of plant root systems in rock cracks, and relates to the field of ecological protection of rock slopes, comprising a planting mould, a rock crack simulation sample, a light shield, a 3D scanner and an upper computer; the planting mold is arranged on the simulation sample, the bottom of the planting mold is provided with a through hole for the root system to extend in, and crisscrossed V-shaped simulation cracks of crack fillers in the simulation sample are used for simulating the real rock mass environment. During monitoring, after the root system enters the cracks, the light shield is removed, a 3D scanner is utilized to perform non-contact scanning according to a preset strategy, data are obtained, then the light shield is used for re-shading, and a root system three-dimensional growth model is built through an upper computer. According to the application, the growth process of the root system in the rock fissure is monitored for a long time by adopting a nondestructive monitoring mode, so that the authenticity and the representativeness of a three-dimensional growth model of the root system are improved, and more representative basic data are provided for researching the overall stability calculation of the root soil complex and the slope rock mass in the rock slope spray-seeding ecological restoration project.

Inventors

• LI FUPING
• XIA DONG
• LI XIAOGUANG
• WANG RUNZHE
• AI YANJUN
• ZHANG ZEYU
• AN ZIXU

Assignees

• 华北理工大学

Dates

Publication Date

20260508

Application Date

20260211

Claims (10)

1. 1. The device for monitoring the growth condition of the plant root system in the rock fracture is characterized by comprising a planting mould, a rock fracture simulation sample, a light shield, a 3D scanner and an upper computer; The planting mould is arranged on the rock fracture simulation sample and is used for accommodating an implant to be researched, a plurality of through holes are formed in the bottom of the planting mould, the rock fracture simulation sample is a transparent material sample provided with a plurality of crisscrossed simulation fractures, and the simulation fractures of the rock fracture simulation sample are filled with fracture fillers; the light shield is sleeved on the outer side of the rock fracture simulation sample and is used for preventing the root system grown out of the implant to be researched from generating phototropic growth; the 3D scanner is electrically connected with the upper computer; After the root system grown by the implant to be researched passes through the through hole, removing the light shield, carrying out non-contact scanning on the growth condition of the plant root system of the plant to be researched in the rock fracture simulation sample by utilizing the 3D scanner according to a preset scanning strategy, sleeving the light shield on the outer side of the rock fracture simulation sample again after a scanning result is obtained, and generating a root system three-dimensional model according to the scanning result by a computer.
2. 2. The plant root growth monitoring device in rock cracks according to claim 1, wherein the lower surface of the planting mold is in close contact with the upper surface of the rock crack simulation sample to form a whole, and the cross-sectional shape and the cross-sectional size of the planting mold are consistent with those of the rock crack simulation sample.
3. 3. The plant root growth monitoring device in rock cracks according to claim 1, wherein in the simulated cracks, the spacing of any adjacent two transverse simulated cracks is less than or equal to 5cm and the spacing of any adjacent two longitudinal simulated cracks is less than or equal to 5cm.
4. 4. The device for monitoring the growth condition of the plant root system in the rock cracks according to claim 3, wherein the simulated cracks specifically comprise a first crack, a second crack and a third crack, the width of the first crack is 1 mm-2 mm, the width of the second crack is 2 mm-4 mm, and the width of the third crack is 4 mm-6 mm.
5. 5. The plant root system growth monitoring device in rock cracks according to claim 4, wherein the first, second and third cracks are alternately spaced apart in the transverse direction and the first, second and third cracks are alternately spaced apart in the longitudinal direction.
6. 6. The plant root growth monitoring device in rock cracks according to claim 1, wherein the preset scanning strategy is to periodically scan at intervals of one hour for a preset scanning number of days, and the preset scanning number of days is greater than or equal to 150 days.
7. 7. The plant root growth monitoring device in rock cracks according to claim 1, wherein the plant to be studied is a plant growth matrix mixture for seeding plant seeds to be studied.
8. 8. The plant root growth monitoring device in rock cracks according to claim 1, wherein the plant seeds to be studied comprise at least any one of perennial herb seeds or perennial shrub seeds.
9. 9. The plant root growth monitoring device in rock cracks according to claim 1, wherein the crack filler is transparent glass spheres mixed with different particle sizes and roundness.
10. 10. A plant root growth monitoring device in a rock fracture according to claim 3, wherein the transparent glass spheres have a maximum particle size less than or equal to half the width of the upper opening of the simulated fracture into which they are filled.

Description

Plant root system growth condition monitoring device in rock crack Technical Field The application relates to the field of ecological protection of rock slopes, in particular to a device for monitoring growth conditions of plant root systems in rock cracks. Background In the ecological restoration engineering of a rock slope, the spray seeding technology is one of the most common technologies for realizing the slope re-greening and vegetation slope protection, and the interaction of a plant root system and a fractured rock mass is one of key indexes for representing the three-in-one overall stability of a plant substrate, the root system and the slope rock mass. In the research of the stability of the joint of the root-soil complex and the rock slope, most of the research is focused on the aspects of the interaction between the root system and the plant-growing base material or the strength and deformation characteristics of the joint of the root-soil complex and the rock, and the research results of the interaction between the root system and the fractured rock mass are very few, especially the research results of the growth characteristics of the root system in the rock mass fracture are less. In fact, key factors affecting the trinity overall stability of the plant-growing base material-root system-slope rock mass are closely related to the physical and mechanical properties of the plant-growing base material, the distribution characteristics of root systems in the plant-growing base material and the overall stability of root soil complex, and the stretching characteristics of root systems in rock mass cracks. After the root system is deep into the rock mass fracture, the root system plays a good anchoring role on the root soil complex, and the overall stability of the plant-growing base material-root system-slope rock mass triad is enhanced. At present, a large number of research blanks exist in the aspect of expanding plant root systems in rock cracks, and a research method mainly comprises a research method combining indoor test and theoretical analysis, namely, the plant root systems are taken out and then soil on the surfaces of the plant root systems is cleaned, and the morphological characteristics of the root systems are analyzed by adopting a root system scanner. The existing crack structure in the plant root system observation process is simple. The real rock cracks are crisscrossed cracks, sand grains, soil and other substances are filled in the cracks, meanwhile, the growth characteristics of plant roots in the cracks filled with the sand grains, the soil and other substances are obviously different from those in the cracks without the filler, the difference between the growth characteristics of the plant roots and the growth environment of the plant is large, the growth condition of a single root system extending into the transverse cracks can only be observed in an observation chamber in the prior art, the growth conditions of a plurality of root systems cannot be observed, the observation results are two-dimensional results, and the observation of the three-dimensional growth condition of the root system cannot be realized. Disclosure of Invention The application aims to provide a plant root system growth condition monitoring device in rock cracks, which can monitor the growth process of the root system in the rock cracks for a long time by adopting a nondestructive monitoring mode, improves the authenticity and the representativeness of a three-dimensional growth model of the root system, and provides more representative basic data for researching the overall stability calculation of a root soil complex and a slope rock mass in a rock slope spray-seeding ecological restoration project. In order to achieve the above object, the present application provides the following. The application provides a plant root system growth condition monitoring device in rock cracks, which comprises a planting mould, a rock crack simulation sample, a shading cover, a 3D scanner and an upper computer, wherein the planting mould is arranged on the rock crack simulation sample, the planting mould is used for containing a plant to be researched, a plurality of through holes are formed in the bottom of the planting mould, the rock crack simulation sample is a transparent material sample provided with a plurality of crisscrossed simulation cracks, crack fillers are filled in the simulation cracks of the rock crack simulation sample, the cracks are V-shaped cracks with wide upper parts and narrow lower parts, the shading cover is sleeved on the outer side of the rock crack simulation sample, the shading cover is used for preventing the root system grown by the plant to be researched from generating phototropic growth, the 3D scanner is electrically connected with the upper computer, after the root system grown by the plant to be researched passes through the through holes, the shading cover is removed, the 3D scann