Underground structure near-rock side air environment monitoring device

Abstract

The utility model discloses an underground structure near-rock side air environment monitoring device, and relates to the technical field of tunnel and underground engineering monitoring. Comprising an air environment monitoring device shell installed in surrounding rock or a primary support, one side, close to the surrounding rock, of the air environment monitoring device shell is provided with an opening, the other side is provided with a lead pipe, one end of the lead pipe is communicated with the interior of the air environment monitoring device shell, and the other end extends to the free side; an air environment monitoring sensor is installed in the air environment monitoring device shell and connected with the acquisition instrument through a monitoring data transmission signal line penetrating through the lead pipe. Through the underground structure near-rock side air environment monitoring device, long-term monitoring of the near-rock side air environment of an underground engineering main body structure can be realized, and effective data support is provided for reliability verification and scientific research of engineering measures in a salt-containing stratum corrosive environment.

Description

TECHNICAL FIELD

[0001] The utility model relates to a tunnel and underground engineering monitoring technical field, especially relate to a kind of underground structure near rock side air environment monitoring devices. BACKGROUND

[0002] The design service life of tunnel and other underground structures is often long, up to 50 years, or even 100 years. In addition to construction safety and structural safety, durability is also a major problem faced by underground structures. Especially in salt-bearing strata, the corrosive ions in surrounding rock and groundwater seriously affect the service life of reinforced concrete structures. Measures to improve the durability of reinforced concrete structures are mainly divided into "separation" and "resistance". The "resistance" measures mainly focus on improving the performance of the main structure materials, while the "separation" uses water-impermeable and corrosion-resistant synthetic materials to separate the underground structure from the salt-bearing surrounding rock and groundwater, creating a good service environment for the underground structure.

[0003] Due to the same corrosive environment, "separation" reduces the input of underground structure materials compared to "resistance". Therefore, when using "separation" measures, it is necessary to use monitoring methods to monitor the corrosive environment near the rock side of the underground structure for a long time to verify the reliability of the engineering measures. UTILITY MODEL CONTENT

[0004] To solve the above problems, the utility model provides an underground structure near rock side air environment monitoring device, which can monitor the corrosive environment behind the underground reinforced concrete structure based on the installation of the device, and allows maintenance and replacement of monitoring components, providing accurate data support for long-term service of underground structures.

[0005] The utility model adopts the technical scheme:

[0006] An underground structure near rock side air environment monitoring device, comprising an air environment monitoring device shell installed in surrounding rock or initial support, the air environment monitoring device shell is open on the side close to the surrounding rock, and a lead tube is installed on the other side, one end of the lead tube communicates with the inside of the air environment monitoring device shell, and the other end extends to the air side;Air environment monitoring sensor is installed in the air environment monitoring device shell, and the air environment monitoring sensor is connected with the acquisition instrument through the monitoring data transmission signal line passing through the lead tube.

[0007] Further, the air environment monitoring device shell is a hollow cuboid or cylindrical structure, and an open surface is arranged on the side close to the surrounding rock. The remaining surfaces are connected in a closed manner, and a small hole for the air environment monitoring sensor is reserved on the geometric surface corresponding to the open surface.

[0008] Further, the lead tube is a hollow tube structure, one end of which is fixedly installed at the small hole of the air environment monitoring device shell, and the other end extends to the air side, and a lead tube end cover is detachably installed at the end of the other end.

[0009] Further, the lead tube end cover is provided with a via hole through which the monitoring data transmission signal line passes.

[0010] Further, the installation space of the surrounding rock or the primary support is formed by excavation or reservation.

[0011] Further, the inner wall of the installation space is paved with a water-impermeable and corrosion-resistant synthetic material plate.

[0012] The beneficial effects of the utility model are:

[0013] The underground structure near-rock side air environment monitoring device can realize long-term monitoring of the air environment near the rock side of the main structure of the underground engineering, and provide effective data support for the reliability verification of engineering measures in the salt-containing stratum corrosive environment and scientific research. The underground structure near-rock side air environment monitoring device is simple in construction, easy to obtain materials, easy to process, and does not affect the stress of the main structure. The underground structure near-rock side air environment monitoring device can realize real-time replacement when the monitoring sensor cannot work normally or adjustment when the monitoring object changes, ensuring the continuity and long-term nature of the monitoring process and providing reliable and sufficient data. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a whole structure schematic view of the utility model underground structure near-rock side air environment monitoring device;

[0015] Figure 2 , Figure 3 It is an installation schematic view of the utility model underground structure near-rock side air environment monitoring device;

[0016] In the figure, 1 is an air environment monitoring device shell, 2 is a lead tube, 3 is an air environment monitoring sensor, 4 is a monitoring data transmission signal line, 5 is a lead tube end cover, and 6 is a synthetic material plate. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings of the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the utility model.

[0018] The embodiment provides an air environment monitoring device for the rock side of an underground structure, as shown in the drawings. Figure 1 The air environment monitoring device for the rock side of the underground structure comprises an air environment monitoring device shell 1, the air environment monitoring device shell 1 is open on one side, and a lead tube 2 is installed on the other side, and one end of the lead tube 2 is communicated with the inside of the air environment monitoring device shell 1. An air environment monitoring sensor 3 is installed in the air environment monitoring device shell 1, and the air environment monitoring sensor 3 is connected with a collection instrument through a monitoring data transmission signal line 4 penetrating through the lead tube 2.

[0019] The collection instrument is not shown in the drawings, the collection instrument, the monitoring data transmission signal line 4 and the air environment monitoring sensor 3 all adopt commercially available products, for example, a collection instrument for Vaisala Indigo500 type air environment monitoring and a Vaisala HMT330 type multifunctional environment monitoring sensor matched with the collection instrument. The air environment monitoring sensor 3 can realize the monitoring of parameters such as air temperature, humidity and corrosive ion concentration according to the actual monitoring requirements; the monitoring data transmission signal line 4 transmits the signals collected by the sensor to the outside, so that the collection instrument decodes the signals and obtains the required data.

[0020] As shown in Figure 1 , Figure 2 and Figure 3 , the air environment monitoring device shell 1 in the embodiment is a hollow cuboid structure, and is made of a material with high durability, such as PVC, which is easy to process and shape and has no influence on the normal work of the monitoring sensor; of course, the air environment monitoring device shell 1 can also adopt a cylindrical structure. For the underground structure without other rigid structures between the main body structure and the surrounding rock, the air environment monitoring device shell 1 can be installed in the surrounding rock; for the underground structure such as a tunnel using a composite lining, the air environment monitoring device shell 1 can be installed in the primary support. The side of the air environment monitoring device shell 1 close to the surrounding rock should be open, and in the embodiment, the side of the air environment monitoring device shell 1 close to the surrounding rock is designed as an open surface, the remaining surfaces except the open surface are closed and connected, and a small hole for the air environment monitoring sensor 3 to enter is reserved on the geometric surface corresponding to the open surface, and the small hole is preferably 3-5mm larger than the outer diameter of the lead tube 2. Figure 1 , Figure 2 and Figure 3As shown, the lead tube 2 in the embodiment is a hollow tube structure, the inner diameter of which should ensure that the air environment monitoring sensor 3 can pass through smoothly, and can be made of materials such as PVC which have high strength, high durability and no influence on the normal work of the monitoring sensor. One end of the lead tube 2 is fixedly installed at the small hole of the air environment monitoring device shell 1, and the other end extends to the air side, and a lead tube end cover 5 is detachably installed at the end of the other end. The length of the lead tube 2 should be greater than the thickness of the main structure of the underground engineering; the lead tube end cover 5 is provided with a via hole through which the monitoring data transmission signal line 4 passes, and the lead tube end cover 5 is used to separate the air environment between the near-rock side and the air side of the underground structure, so as to ensure that the working environment of the monitoring sensor is not affected by the air side. The "near-rock side" is the side close to the surrounding rock or rock mass, and the "air side" is the side close to the air or open space in the underground structure.

[0021] The construction process of the air environment monitoring device on the near-rock side of the underground structure is as follows:

[0022] As shown in Figure 2 and Figure 3 , first, an installation space is constructed by excavation or reservation inside the surrounding rock or primary support, and the installation space is slightly larger than the size of the air environment monitoring device shell 1; then a water-impermeable and corrosion-resistant synthetic material plate 6 is laid on the inner wall of the installation space, and the synthetic material plate 6 functions to enable the air environment monitoring sensor 3 to work in a corrosion-resistant and waterproof environment, thereby prolonging the service life of the air environment monitoring sensor 3; then the air environment monitoring device shell 1 and the lead tube 2 are installed in the installation space, the open side of the air environment monitoring device shell 1 faces the rock side, and the small hole side faces the air side; at the same time, a water-impermeable high-strength adhesive material is used to fill and compact the gap between the outer wall of the air environment monitoring device shell 1 and the installation space, so as to prevent cement slurry from entering the air environment monitoring device shell 1 during the pouring of the main structure of the underground engineering.

[0023] At this time, the main structure of the underground engineering can be constructed, and after the main structure reaches the strength, the excess length of the lead tube 2 is cut off; the air environment monitoring sensor 3 connected with the monitoring data transmission signal line 4 is sent into the air environment monitoring device shell 1 through the lead tube 2; after the monitoring data transmission signal line 4 is connected with the collection instrument, the air environment monitoring sensor 3 enters the working state, and after the work is normal, the lead tube end cover 5 is installed on the end of the lead tube 2 to close the lead port.

[0024] The air environment monitoring sensor 3 can transmit the monitoring data of air temperature, humidity, corrosion ion concentration and other parameters to the acquisition instrument through the monitoring data transmission signal line 4, so that the long-term monitoring of the air environment of the near rock side of the main structure of the underground engineering is realized, and effective data support is provided for the reliability verification of engineering measures in the corrosive environment of the salt-bearing stratum and scientific research. The detachable lead pipe end cover 5 can be used for maintenance, replacement and adjustment of the air environment monitoring sensor.

[0025] In summary, the underground structure near rock side air environment monitoring device can realize long-term monitoring of the air environment of the near rock side of the main structure of the underground engineering, and provide effective data support for the reliability verification of engineering measures in the corrosive environment of the salt-bearing stratum and scientific research. The underground structure near rock side air environment monitoring device can be applied to various scenes such as mountain ridges and urban underground structures, and can provide air environment monitoring data of the near rock side of the underground structure for engineering construction.

[0026] The basic principle, main features and advantages of the present application are shown and described above. It should be understood by those skilled in the art that the present application is not limited by the above embodiments, and the above embodiments and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. An apparatus for monitoring the air environment on the near- rock side of an underground structure, characterised in that: The underground structure near rock side air environment monitoring device comprises an air environment monitoring device shell installed in the surrounding rock or the primary support, the air environment monitoring device shell is open on the side close to the surrounding rock, and a lead tube is installed on the other side, one end of the lead tube is communicated with the inside of the air environment monitoring device shell, and the other end extends to the air side; the air environment monitoring device shell is internally installed with an air environment monitoring sensor, and the air environment monitoring sensor is connected with a collection instrument through a monitoring data transmission signal line penetrating through the lead tube.

2. The in-situ structural near-formation air environment monitoring device of claim 1, wherein: The air environment monitoring device shell is a hollow cuboid or cylindrical structure, the side close to the surrounding rock is an open surface, the remaining surfaces except the open surface are closed and connected, and a small hole for the air environment monitoring sensor to enter is reserved on the geometric surface corresponding to the open surface.

3. The in-situ structural near- rockside air environment monitoring device according to claim 2, characterized in that: The lead tube is a hollow tube structure, one end of the lead tube is fixedly installed at the small hole of the air environment monitoring device shell, the other end extends to the air side, and a lead tube end cover is detachably installed at the end of the other end.

4. The in-situ structural near- rockside air environment monitoring apparatus according to claim 3, characterized by: The lead tube end cover is provided with a via hole for the monitoring data transmission signal line to pass through.

5. The in-situ formation near-formation-side air environment monitoring apparatus according to claim 1, characterized by: The surrounding rock or the primary support forms an installation space matched with the air environment monitoring device shell through excavation or reservation.

6. The in-situ structural near-formation air environment monitoring device of claim 5, wherein: A water-impermeable and corrosion-resistant synthetic material plate is laid on the inner wall of the installation space.

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