CN209907317U

CN209907317U - A divide and manage system for mud-rock flow prevention and cure engineering

Info

Publication number: CN209907317U
Application number: CN201920690999.5U
Authority: CN
Inventors: 周宏伟; 吴佳俊; 王佳美; 姜蕊; 费文平; 霍苗; 杨丰荣; 林星
Original assignee: Sichuan University
Current assignee: Sichuan University
Priority date: 2019-05-15
Filing date: 2019-05-15
Publication date: 2020-01-07
Anticipated expiration: 2029-05-15

Abstract

The utility model relates to a separate treatment system for debris flow control engineering, which comprises a bottom box body, wherein the top of the bottom box body is distributed with a plurality of water filtering longitudinal beams; the drainage system comprises a drainage pipeline; the debris flow blocking system is arranged at a proper position in the trench; the bottom box body is arranged on the downstream side of the debris flow retaining system, the water filtering longitudinal beams are arranged at certain intervals, and the water filtering longitudinal beams are longitudinally arranged along the trench; the drainage pipeline is buried underground, the starting point is connected with the bottom box body, the end point is positioned at the downstream of the channel or at the outer side of the channel, and the filtered water in the debris flow is guided to the position outside the channel. The utility model discloses the mud-rock flow after will blocking the sand dam and select separately further filter sand that permeates water for the mud-rock flow that sees through the dam body stops the silt fast in the channel, has reduced the threat to the low reaches building.

Description

A divide and manage system for mud-rock flow prevention and cure engineering

Technical Field

The utility model belongs to environment geotechnical engineering field, concretely relates to divide and manage system for mud-rock flow prevention and cure engineering.

Background

The debris flow is a typical solid-liquid two-phase flow and occurs in valleys of mountainous areas with more loose substances and rich rainfall. Driven by the action of gravity, the moving speed is high, the impact force is extremely high, and great threat can be caused to downstream buildings. After the earthquake in Wenchuan, the debris flow disasters in the southwest area are obviously increased, and the prevention and treatment work of the debris flow is particularly important.

The debris flow blocking dam is a prevention and control measure built in a debris flow channel, and can directly block debris flow in front of the dam so as to achieve the purposes of preventing and controlling the debris flow and effectively reducing the harm of the debris flow to the downstream. The solid sand dam can intercept all the solid and liquid in the debris flow in the reservoir, but the solid and liquid will put higher requirements on the reservoir capacity of the sand dam. In order to make up for the deficiencies of solid dams, permeable dams are used in large numbers in practical projects. One characteristic of permeability dam is that can block the coarse grain in the mud-rock flow behind the dam, and the fine particle is excreted the low reaches, alleviates reservoir capacity pressure, but permeability dam has only selected separately to the mud-rock flow at leading position in the actual engineering, and a large amount of coarse grains are piled up and are blockked up the escape orifice behind the dam, seriously influence the separation performance to follow-up mud-rock flow, and its screening effect to mud-rock flow is not ideal. Subsequently, researchers proposed horizontal debris flow blocking structures, such as a debris flow breaker, a fish-ridge type debris dam, an autonomous screening structure for debris flow control, and the like, which have a good screening effect on debris flows, but a large amount of fine particles and free water penetrating through the dam body will continue to move in a downstream channel, and are easy to cause secondary disasters (debris flows, torrential floods, and the like). Therefore, a new method for economically and effectively comprehensively treating debris flow needs to be explored urgently.

SUMMERY OF THE UTILITY MODEL

The utility model discloses to the problem that secondary disasters such as mountain torrents are easily formed to debris flow screening back sediment trapping dam low reaches channel, provide a branch control system that administers to each component of debris flow. The system can not only screen the debris flow, but also filter the fine particles and water penetrating through the dam body again, guide the free water to a downstream river channel through the drainage system, and automatically stop silting in the channel by the fine particles.

In order to achieve the above purpose, the utility model adopts the technical proposal that:

the system comprises a debris flow blocking system for blocking and screening debris flow, a bottom water filtering system for filtering water and discharging sand, and a drainage system for leading water to the downstream; the debris flow blocking system comprises a debris flow sand blocking dam with an autonomous screening function; the bottom water filtering system comprises a bottom box body, and a plurality of water filtering longitudinal beams are distributed on the top of the bottom box body; the drainage system comprises a drainage pipeline; the debris flow blocking system is arranged at a proper position in the trench; the bottom box body is arranged on the downstream side of the debris flow retaining system, the water filtering longitudinal beams are arranged at certain intervals, and the water filtering longitudinal beams are longitudinally arranged along the trench; the drainage pipeline is buried underground, the starting point is connected with the bottom box body, the end point is positioned at the downstream of the channel or at the outer side of the channel, and the filtered water in the debris flow is guided to the position outside the channel.

The distance between the adjacent water filtering longitudinal beams is coordinated with the distance between the grids of the debris flow blocking system and is smaller than the distance between the grids of the debris flow blocking system. When satisfactory water permeability is achieved, excessive debris flow particles cannot penetrate through the water filtration longitudinal beam.

Furthermore, the inclination angle of the water filtering longitudinal beam is the same as that of the channel or is slightly steeper than the gradient of the channel.

The drainage pipeline is buried underground or penetrates through a mountain body, the specific size of the drainage pipeline is determined according to factors such as water flow, gradient and topographic and geological conditions in the channel, and the drainage pipeline can also consist of a plurality of drainage pipelines.

The beneficial effects of the utility model are that:

1. mud-rock flow divides control system can be with the mud-rock flow further water-permeable sand filtration after the sand blocking dam is selected separately for the mud-rock flow that sees through the dam body stops the silt fast in the channel, has reduced the threat to the low reaches building.

2. Mud-rock flow divides the system of treating makes and sees through water and granule in the dam body mud-rock flow separately, has reduced the discharge in the channel, has alleviateed rivers to the erosion and corrosion effect of ditch bed, prevents to form the mud-rock flow in the low reaches channel once more.

3. Mud-rock flow divides control system to be used for mud-rock flow to administer and has simple structure, and the construction cost is low, and the maintenance cost is low, and one-time construction is effective for a long time.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic top view of the present invention;

fig. 3 is a schematic side view of the dispensing system of the present invention.

Detailed Description

The branch control system for debris flow prevention and control engineering of the present invention will be further described below by way of specific embodiments.

As shown in fig. 1 to 3, the separate treatment system for the debris flow prevention project comprises a debris flow blocking system 1 for blocking and screening debris flow, a bottom water filtering system 2 for filtering water and discharging sand, and a drainage system 3 for leading water to the downstream; the debris flow retaining system 1 comprises a debris flow sand dam with an autonomous screening function; the bottom water filtering system 2 comprises a bottom box body 2-2, and a plurality of water filtering longitudinal beams 2-1 are distributed on the top of the bottom box body 2-2; the drainage system 3 comprises a plurality of drainage pipelines 3-1; the debris flow blocking system 1 is arranged at a proper position in the channel; the bottom box body 2-2 is arranged on the downstream side of the debris flow retaining system 1, the water filtering longitudinal beams 2-1 are arranged at certain intervals, and the water filtering longitudinal beams 2-1 are longitudinally arranged along the trench; the drainage pipeline 3-1 is buried underground, the starting point is connected with the bottom box body 2-2, the end point is positioned at the downstream of the channel or at the outer side of the channel, and the filtered water in the debris flow is guided to the position outside the channel.

The distance between the adjacent water filtering longitudinal beams 2-1 is coordinated with the grid distance of the debris flow retaining system 1 and is smaller than that of the debris flow retaining system 1.

The inclination angle of the water filtering longitudinal beam 2-1 is the same as that of the channel or slightly steeper than the gradient of the channel.

The debris flow retaining system 1 may be a debris flow dam (ZL 201720562613.3) with autonomous screening function.

The water filtering longitudinal beam 2-1 is formed by arranging a plurality of I-shaped steel on the downstream side of the sand dam at equal intervals along the inclination direction of the bottom of the trench, two ends of the water filtering longitudinal beam 2-1 are lapped on two side walls on the upstream side and the downstream side of the bottom box body 2-2, the height of the upstream side wall is larger than that of the downstream side wall to form a downstream inclination angle, the inclination angle of the water filtering longitudinal beam 2-1 is close to that of the trench, and the bottom plate of the box body has a certain inclination inclined to the direction of a drainage pipeline 3-. The opening of the side wall at the downstream side of the bottom box body 2-2 is connected with a drainage pipeline 3-1, and the drainage pipeline 3-1 is buried at the bottom of the trench and extends to the outlet of the trench or the downstream river channel along the trench downstream.

The specific implementation process of the embodiment comprises the following steps:

(1) constructing a debris flow blocking dam on the upstream side of the water filtering longitudinal beam 2-1 according to the requirements of a debris flow blocking dam (ZL 201720562613.3) with an automatic screening function, and properly controlling the grid spacing of the debris flow blocking system 1 to be d of a debris flow grading curve₈₀～d₉₅。

(2) The water filtering longitudinal beams 2-1 are arranged in the trenches at intervals of 10cm and made of I-shaped steel, the length of each water filtering longitudinal beam 2-1 is 3m, the inclination angle of the inclined downstream is 18 degrees, two ends of each water filtering longitudinal beam 2-1 are lapped on two side walls on the upstream side and the downstream side of the bottom box body 2-2, and the lapping length is 0.4 m.

(3) The lower part of the water filtering longitudinal beam 2-1 is provided with a bottom box body 2-2, the thickness of a side wall is not less than 0.5m, the height is not less than 1.2m, the bottom plate of the bottom box body 2-2 inclines to the downstream, the inclination angle is 10 degrees, and the opening of the side wall at the downstream side is connected with a drainage pipeline 3.

(4) The upstream end of the drainage pipeline 3-1 is connected with the side wall at the downstream side of the bottom box body 2-2, is buried at the bottom of the trench, has the buried depth of 0.5m and the pipe diameter of 600mm, and extends to the outlet of the trench or the downstream river channel along the trench downstream.

Claims

1. The separate treatment system for the debris flow control project is characterized by comprising a debris flow blocking system (1) for blocking and screening debris flow, a bottom water filtering system (2) for filtering water and discharging sand, and a drainage system (3) for leading water to the downstream; the debris flow retaining system (1) comprises a debris flow sand dam with an autonomous screening function; the bottom water filtering system (2) comprises a bottom box body (2-2), and a plurality of water filtering longitudinal beams (2-1) are distributed at the top of the bottom box body (2-2); the drainage system (3) comprises a drainage pipeline (3-1); the debris flow blocking system (1) is arranged at a proper position in the channel; the bottom box body (2-2) is arranged on the downstream side of the debris flow retaining system (1), the water filtering longitudinal beams (2-1) are arranged at certain intervals, and the water filtering longitudinal beams (2-1) are longitudinally arranged along the trench; the drainage pipeline (3-1) is buried underground, the starting point is connected with the bottom box body (2-2), the end point is positioned at the downstream of the channel or at the outer side of the channel, and the filtered water in the debris flow is guided to the position outside the channel.

2. The separate treatment system for debris flow control projects according to claim 1, wherein the distance between adjacent water filtration longitudinal beams (2-1) is coordinated with and smaller than the grid distance of the debris flow retaining system (1).

3. The separate treatment system for the debris flow control project according to the claim 1 or 2, wherein the inclination angle of the water filtering longitudinal beam (2-1) is the same as the channel or slightly steeper than the channel gradient.