阅读说明：本技术 一种模拟寒区隧道衬砌的热冷交替环境试验系统 (Cold region tunnel lining simulated hot-cold alternative environment test system ) 是由 曹鹏 郭鸿雁 丁浩 夏杨于雨 吴森阳 胡学兵 落桑慈成 陈建忠 刘帅 陈俊涛 孔 于 2020-05-29 设计创作，主要内容包括：本发明涉及一种模拟寒区隧道衬砌的热冷交替环境试验系统,属于隧道技术领域。该系统包括高低温试验箱、稳定热源模拟系统、衬砌围岩模拟系统和数据采集系统；所述高低温试验箱内设有稳定热源模拟系统；所述稳定热源模拟系统外设有数据采集系统；所述稳定热源模拟系统外设有衬砌围岩模拟系统,所述衬砌围岩模拟系统包括围岩层和衬砌层。本发明有助于分析寒区隧道衬砌所处环境的温度变化特征。(The invention relates to a hot and cold alternative environment test system for simulating a cold region tunnel lining, and belongs to the technical field of tunnels. The system comprises a high-low temperature test box, a stable heat source simulation system, a lining surrounding rock simulation system and a data acquisition system; a stable heat source simulation system is arranged in the high-low temperature test box; a data acquisition system is arranged outside the stable heat source simulation system; and a lining surrounding rock simulation system is arranged outside the stable heat source simulation system and comprises a surrounding rock layer and a lining layer. The method is beneficial to analyzing the temperature change characteristics of the environment where the tunnel lining in the cold region is located.)

1. The utility model provides a cold district tunnel lining's hot cold environment test system that alternates which characterized in that: the system comprises a high-low temperature test chamber, a stable heat source simulation system, a lining surrounding rock simulation system and a data acquisition system;

a stable heat source simulation system is arranged in the high-low temperature test box;

a data acquisition system is arranged outside the stable heat source simulation system;

and a lining surrounding rock simulation system is arranged outside the stable heat source simulation system and comprises a surrounding rock layer and a lining layer.

2. The system for simulating cold region tunnel lining hot and cold alternating environment test according to claim 1, wherein: the temperature regulation range of the high-low temperature test box is-40-130 ℃, the humidity range is 10-98% RH, the temperature fluctuation degree in no-load is +/-0.5 ℃, the temperature deviation is less than or equal to +/-2 ℃, the average temperature rise and fall speed in no-load is 0.7-1.0 ℃/min, and the time is set to be in the range of 0-9999 hours.

3. The system for simulating cold region tunnel lining hot and cold alternating environment test according to claim 1, wherein: the stable heat source simulation system is an electric heating thermostat, the shape of the shell of the electric heating thermostat is consistent with the section of the highway tunnel, and the temperature range provided by the outer surface of the electric heating thermostat is 5-65 ℃.

4. The system for simulating cold region tunnel lining hot and cold alternating environment test according to claim 1, wherein: and the lining surrounding rock simulation system determines the type of the surrounding rock, the grade of the surrounding rock, the lining size and the material characteristics according to the tunnel geological survey data and the tunnel design data so as to ensure that the test object is consistent with the actual condition of the tunnel.

5. The system for simulating cold region tunnel lining hot and cold alternating environment test according to claim 1, wherein: in the data acquisition system, arrange temperature sensor along lining cutting thickness direction, test lining cutting temperature transfer characteristic under different operating modes, and then the temperature variation characteristic of analysis lining cutting structure under different freeze thawing environment: selecting 5 nodes along the radial direction of the tunnel surrounding rock, recording a curve of temperature changing along with time, wherein the distances from the 5 nodes to the outer surface of the lining are 0cm, 20cm, 30cm, 50cm and 100cm respectively;

the real-time data of the temperature sensor is collected in the test process, the data is processed in real time through a computer, and the temperature distribution characteristics of different positions of the lining structure are mastered in real time.

Technical Field

The invention belongs to the technical field of tunnels, and relates to a hot and cold alternative environment test system for simulating a cold region tunnel lining.

Background

With the construction of more and more cold region tunnels, the freeze injury phenomenon occurs to different degrees in the construction or operation stage of the part of cold region tunnels built or constructed at home and abroad. The research on the treatment means and the method for the cold region tunnel freezing injury firstly needs to analyze the temperature change characteristics of the environment where the cold region tunnel lining is located, so that a method and a test system for simulating the hot-cold alternate cycle environment where the cold region tunnel lining is located are provided.

Disclosure of Invention

In view of this, the present invention provides a hot and cold alternating environment test system for simulating a tunnel lining in a cold region.

In order to achieve the purpose, the invention provides the following technical scheme:

a hot and cold alternative environment test system for simulating tunnel lining in cold regions comprises a high and low temperature test box, a stable heat source simulation system, a lining surrounding rock simulation system and a data acquisition system;

a stable heat source simulation system is arranged in the high-low temperature test box;

a data acquisition system is arranged outside the stable heat source simulation system;

and a lining surrounding rock simulation system is arranged outside the stable heat source simulation system and comprises a surrounding rock layer and a lining layer.

Optionally, the temperature regulation range of the high-low temperature test box is-40 ℃ to 130 ℃, the humidity range is 10% to 98% RH, the temperature fluctuation degree during no-load is +/-0.5 ℃, the temperature deviation is less than or equal to +/-2 ℃, the average temperature rise and fall rate during no-load is 0.7 ℃ to 1.0 ℃/min, and the time is set to be within the range of 0 to 9999 hours.

Optionally, the stable heat source simulation system is an electric thermostat, the shape of the shell of the electric thermostat is consistent with the section of the highway tunnel, and the temperature range provided by the outer surface of the electric thermostat is 5-65 ℃.

Optionally, the lining surrounding rock simulation system determines the type of the surrounding rock, the grade of the surrounding rock, the lining size and the material characteristics according to the tunnel geological survey data and the tunnel design data, so as to ensure that the test object is consistent with the actual condition of the tunnel.

Optionally, in the data acquisition system, arrange temperature sensor along lining cutting thickness direction, test lining cutting temperature transfer characteristic under different operating modes, and then the temperature variation characteristic of analysis lining cutting structure under different freeze thawing environment: selecting 5 nodes along the radial direction of the tunnel surrounding rock, recording a curve of temperature changing along with time, wherein the distances from the 5 nodes to the outer surface of the lining are 0cm, 20cm, 30cm, 50cm and 100cm respectively;

the real-time data of the temperature sensor is collected in the test process, the data is processed in real time through a computer, and the temperature distribution characteristics of different positions of the lining structure are mastered in real time.

The invention has the beneficial effects that: the method is beneficial to analyzing the temperature change characteristics of the environment where the tunnel lining in the cold region is located.

Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the means of the instrumentalities and combinations particularly pointed out hereinafter.

Drawings

For the purposes of promoting a better understanding of the objects, aspects and advantages of the invention, reference will now be made to the following detailed description taken in conjunction with the accompanying drawings in which:

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

fig. 2 is a temperature change curve.

Reference numerals: 1-high and low temperature test box, 2-stable heat source simulation system, 3-lining layer, 4-surrounding rock layer and 5-temperature sensor.

Detailed Description

The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention in a schematic way, and the features in the following embodiments and examples may be combined with each other without conflict.

Wherein the showings are for the purpose of illustrating the invention only and not for the purpose of limiting the same, and in which there is shown by way of illustration only and not in the drawings in which there is no intention to limit the invention thereto; to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", etc., based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of description, but it is not an indication or suggestion that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes, and are not to be construed as limiting the present invention, and the specific meaning of the terms may be understood by those skilled in the art according to specific situations.

Fig. 1 is a schematic view of the structure of the present invention. 1 is a high-low temperature test box, 2 is a stable heat source simulation system, 3 is a lining layer, 4 is a surrounding rock layer, and 5 is a temperature sensor.

Firstly, a high-low temperature test chamber is adopted to simulate the surrounding environment of a tunnel, and the main performance parameters are as follows: temperature range: -40 ℃ to 130 ℃; humidity range: 10% -98% RH; temperature fluctuation degree: 0.5 ℃ (no load); temperature deviation: less than or equal to +/-2 ℃; average rate of temperature rise and fall: 0.7-1.0 ℃/min (no load time): time setting range: 0 to 9999 hours.

And secondly, a stable heat source simulation system self-controls an electric heating thermostat, the shape of the housing of the thermostat is consistent with that of the cross section of the highway tunnel, the thermostat is tested, the outer surface of the thermostat is guaranteed to provide a temperature range of +5 ℃ to +65 ℃, and the test can be kept stable at corresponding temperature values so as to simulate the stable geothermal condition in the surrounding rock.

And thirdly, determining the type and grade of the surrounding rock, the lining size, the material characteristics and the like according to the tunnel geological survey data and the tunnel design data, and ensuring that the test object is consistent with the actual condition of the tunnel.

And fourthly, arranging a temperature sensor along the thickness direction of the lining, testing the temperature transfer characteristic of the lining under different working conditions (freezing and thawing environments), further analyzing the temperature change characteristics of the lining structure under different freezing and thawing environments, acquiring real-time data of the temperature sensor in the test process, processing the data in real time through a computer, and grasping the temperature distribution characteristics of different positions of the lining structure in real time. And 5 nodes are selected along the radial direction of the tunnel surrounding rock, and the curve of the temperature along with the time change is recorded, as shown in figure 2. The distances from the 5 nodes to the outer surface of the lining are 0cm, 20cm, 30cm, 50cm and 100cm respectively.

Finally, the above embodiments are only intended to illustrate the technical solutions of the present invention and not to limit the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered by the claims of the present invention.