CN107034900B

CN107034900B - Structure is administered to frozen soil side slope disease of slumping of hot melt

Info

Publication number: CN107034900B
Application number: CN201610073400.4A
Authority: CN
Inventors: 喻文兵; 陆妍; 胡达
Original assignee: Northwest Institute of Eco Environment and Resources of CAS
Current assignee: Northwest Institute of Eco Environment and Resources of CAS
Priority date: 2016-02-03
Filing date: 2016-02-03
Publication date: 2020-11-03
Anticipated expiration: 2036-02-03
Also published as: CN107034900A

Abstract

A disease control structure for a hot melt slumping frozen soil slope comprises a waterproof thermal insulation layer, a gravity supporting structure, a frozen soil slope, a drainage ditch and a drainage pipe, wherein the waterproof thermal insulation layer is arranged between a thermal capacity slumping interface and the gravity supporting structure; a drain pipe is arranged below the waterproof heat-insulating layer; the drainage pipe is communicated with the drainage ditch, the waterproof heat insulation layer is the key point of the structure of the invention, and the heat-melting slumping interface is isolated from the outside atmosphere by utilizing the heat insulation property of the aeolian sand, so that the slumping surface is prevented from continuously melting, and the purpose of maintaining the stability of the slumping surface is achieved. Compared with the existing frozen soil slope management structure, the structure of the invention is simpler, the construction is more convenient, the cost is low, the heat insulation effect is good, the stability of the hot-melt slumped slope can be maintained, the threat to engineering buildings is eliminated, and the frozen soil environment is protected.

Description

Structure is administered to frozen soil side slope disease of slumping of hot melt

Technical Field

The invention relates to the field of treatment of roadbed slopes in permafrost regions, in particular to a structure for treating diseases of hot-melt slumped frozen soil slopes.

Background

Due to engineering activities and climate change, the hot melt landslide side slope diseases in permafrost regions of the Qinghai-Tibet plateau are more prominent. The method has the advantages that the safety of engineering structures is seriously threatened, meanwhile, the ecological environment is damaged, the field investigation and remote sensing image data display of the Qinghai-Tibet railway are carried out, and only 42 hot melt slumps and landslides are in the range of 5km from Chumarl river to wind-fire mountain sections.

At present, the treatment of permafrost slopes lacks mature technologies, and a method for assisting in heating pipe refrigeration by a retaining wall structure in a non-frozen soil area is generally adopted, but the method is not ideal in effect, high in construction difficulty, drilling equipment is needed for heat pipe construction, equipment is difficult to work in a slope section, and the cost is high, so that a new technology needs to be developed to solve the problem of hot melt slumping diseases of the permafrost slopes.

Disclosure of Invention

In view of the above, the present invention aims to provide a frozen soil slope disease control structure for hot melt slumping, which is a novel structure based on heat insulation, water resistance and gravity retaining through theoretical research and simulation analysis, and maintains the stability of the frozen soil slope through the action of a heat insulation layer.

The technical scheme of the invention is as follows:

a disease control structure for a hot melt slumping frozen soil slope comprises a waterproof thermal insulation layer, a gravity supporting structure, a frozen soil slope, a drainage ditch and a drainage pipe, wherein the waterproof thermal insulation layer is arranged between a thermal capacity slumping interface and the gravity supporting structure; a drain pipe is arranged below the waterproof heat-insulating layer; the drain pipe is communicated with the drainage ditch.

The waterproof heat-insulating layer is formed by piling up dry aeolian sand.

The waterproof heat-insulating layer is the key point of the structure of the invention, and the heat-insulating property of the aeolian sand is utilized to isolate the hot-melt slumping interface from the outside atmosphere, thereby preventing the slumping surface from continuously melting and achieving the purpose of maintaining the stability of the slumping surface.

The advantages and the beneficial effects of the invention are as follows:

compared with the existing frozen soil slope management structure, the structure of the invention is simpler, the construction is more convenient, the cost is low, the heat insulation effect is good, the stability of the hot-melt slumped slope can be maintained, the threat to engineering buildings is eliminated, and the frozen soil environment is protected.

Drawings

Fig. 1 is a cross-sectional view of the present invention.

FIG. 2 is a temperature field after 20 years of simulation and forecast of frozen soil slope under natural conditions.

Fig. 3 is a temperature field after 20 years of simulation forecast by the present invention.

In the figure: 1-waterproof thermal insulation layer, 2-gravity retaining structure, 3-frozen soil side slope, 4-drainage ditch, 5-drainage pipe,

6-hot melt slumping interface.

Detailed Description

For a better understanding of the present invention, the following embodiments are provided to illustrate, but not limit the present invention.

As shown in fig. 1, a structure for controlling diseases on a hot-melt slumping frozen soil slope comprises a waterproof thermal insulation layer 1, a gravity retaining structure 2, a frozen soil slope 3, a drainage ditch 4 and a drainage pipe 5, wherein the waterproof thermal insulation layer 1 is arranged between a hot-melt slumping interface 6 and the gravity retaining structure 2; a drain pipe 5 is arranged below the waterproof heat-insulating layer 1; the drain pipe 5 communicates with the drain 4.

Examples

During construction: firstly arranging a water permeable pipe at the toe of a slope as a drain pipe 5, then laying waterproof and water-guiding geotextile along a hot-melt slumping interface 6, then laying reinforced concrete to form a gravity supporting structure 2, then using a dry aeolian sand material as a waterproof heat-insulating layer 1, wherein the thickness is 1.5m, the height is 3.5m, the dry aeolian sand is packaged by a waterproof bag, and finally, waterproofing is carried out at the top of the waterproof heat-insulating layer 1 to prevent precipitation and accumulated snow from being mixed into the waterproof heat-insulating layer 1.

In order to verify the feasibility and the effectiveness of the technical scheme, the simulation forecasting research of the temperature field is carried out on the frozen soil slope and the common structure by using a numerical simulation test method, and the comparison between the figure 2 and the figure 3 shows that the thickness of the frozen soil at the hot-melt slumping interface 6 of the frozen soil slope is expanded outwards, which indicates that the frozen soil is protected and is not continuously melted.

Claims

1. The utility model provides a structure is administered to frozen soil slope disease that slumps is melted to heat, includes gravity retaining structure (2), frozen soil slope (3), escape canal (4) and interface (6) that slumps are melted to heat, characterized by: waterproof and water-guiding geotextiles are laid along the hot-melt slumping interface, a waterproof heat-insulating layer (1) is arranged between the hot-melt slumping interface (6) and the gravity retaining structure (2), the waterproof heat-insulating layer is formed by piling up dry aeolian sand, the dry aeolian sand is packaged by a waterproof bag, and the top of the waterproof heat-insulating layer is waterproof; a drain pipe (5) is arranged below the waterproof heat-insulating layer (1); the drain pipe (5) is communicated with the drain ditch (4).