Surrounding rock temperature measuring device with waterproof structure

Abstract

The utility model discloses a surrounding rock temperature measuring device with a waterproof structure, and relates to the technical field of tunnel temperature monitoring. Comprising a temperature measuring device for measuring the temperature of surrounding rock, a guide pipe structure for grouting and fixing the temperature measuring device, and a waterproof structure for filling a waterproof plate notch; the temperature measuring device comprises a plurality of temperature sensors arranged at intervals and corresponding sensor wires; the guide pipe structure is a PVC guide pipe, a plurality of temperature sensors are adhered to the outer wall of the PVC guide pipe, and cement mortar is injected into the PVC guide pipe; the waterproof structure comprises an EVA plate and a hot melt adhesive, a hole slightly larger than the PVC guide pipe is formed in the EVA plate, the PVC guide pipe is sleeved with the EVA plate, and a gap between the PVC guide pipe and the hole is filled with the hot melt adhesive. Due to the unique waterproof structural design, the potential influence on the original waterproof performance of the tunnel is remarkably reduced, and the waterproof safety of the tunnel structure is ensured. And the temperature of the tunnel surrounding rock at different radial depths can be accurately measured.

Description

Technical Field

[0001] The utility model relates to the technical field of tunnel temperature monitoring, and particularly relates to a surrounding rock temperature measuring device with a waterproof structure. Background Art

[0002] In the vast territory of our country, cold regions are widely distributed. With the continuous expansion of transportation infrastructure, the highway and railway networks are gradually penetrating into these regions with high latitudes, high altitudes, scarce plains and dense mountains. In such a geographical environment, the construction of tunnels is not only a strategic choice to shorten the journey and optimize the route, but also a necessary measure to overcome natural obstacles and promote regional development. However, a major challenge faced by tunnels in cold regions is the frost heaving force caused by the phase change of moisture in the surrounding rock at low temperatures. This mechanical phenomenon runs through the whole process from the design concept, precise construction to long-term maintenance of the tunnel. Therefore, it is particularly important to deeply explore the frost heaving force and its influencing mechanism.

[0003] In view of the direct correlation between the frost heaving force and the internal temperature distribution of the surrounding rock, accurately monitoring the radial temperature distribution of the surrounding rock has become the basis for understanding and predicting the frost heaving behavior. However, in the prior art, there are still many problems to be solved in the embedding method of temperature sensors: firstly, the drilling operation inadvertently damages the integrity of the waterproof layer, posing a potential threat to the overall waterproof efficiency of the tunnel; secondly, the protection measures for the sensor wires are insufficient. Facing the complex construction environment and long-term operation challenges in the tunnel, its durability is difficult to guarantee, and it is more vulnerable to damage during long-distance laying; thirdly, it is difficult to control the density during the grouting process, and the air remaining in the pore channel becomes a non-negligible factor affecting the measurement accuracy. Content of the Utility Model

[0004] The purpose of the utility model is to provide a surrounding rock temperature measuring device with a waterproof structure. Its unique waterproof structure design ensures the waterproof safety of the tunnel; and it can accurately measure the temperature of the tunnel surrounding rock at different radial depths.

[0005] To achieve the above purpose, the technical solution of this application is: a surrounding rock temperature measuring device with a waterproof structure, including a temperature measuring device for measuring the temperature of the surrounding rock, a catheter structure for grouting and fixing the temperature measuring device, and a waterproof structure for filling the gap of the waterproof board, wherein the catheter structure is arranged in the pore channel of the tunnel surrounding rock;

[0006] The temperature measuring device includes a plurality of temperature sensors arranged at intervals, and corresponding sensor wires;

[0007] The catheter structure is a PVC catheter. A plurality of temperature sensors are adhered to the outer wall of the PVC catheter, and cement mortar is injected into the PVC catheter;

[0008] The waterproof structure includes an EVA board and hot melt adhesive. A hole slightly larger than the PVC conduit is opened on the EVA board. The EVA board is sleeved on the PVC conduit, and the gap between the PVC conduit and the hole is filled with hot melt adhesive.

[0009] Further, the temperature measuring device is installed at the stage after the initial lining of the tunnel is completed and the waterproof board of the tunnel is laid, but before the secondary lining of the tunnel starts construction.

[0010] Further, a rubber sleeve is used to sleeve the sensor wire extending out of the duct.

[0011] Further, a through hole for the rubber sleeve to pass through is opened on the EVA board, and the gap between the rubber sleeve and the through hole is filled with hot melt adhesive.

[0012] Further, the sensor wire is fixed to the outer wall of the PVC conduit with tape.

[0013] Furthermore, epoxy resin potting adhesive is injected into the tail of the PVC conduit outside the duct.

[0014] Furthermore, the temperature sensor is connected to a wireless transceiver module through an acquisition instrument, and the workstation obtains the temperature at the location where the temperature sensor is placed through the wireless transceiver module.

[0015] Furthermore, the duct is of a downward inclined structure.

[0016] As a further step, the EVA board has the same material as the tunnel waterproof board.

[0017] As a further step, the EVA board is welded to the tunnel waterproof board.

[0018] Due to the adoption of the above technical solutions, the present utility model can achieve the following technical effects:

[0019] (1) The present utility model adopts temperature sensors arranged in a gradient manner, which can accurately measure the temperature of the tunnel surrounding rock at different radial depths, providing comprehensive and in-depth data support for engineering monitoring.

[0020] (2) Its unique waterproof structure design significantly reduces the potential impact on the original waterproof performance of the tunnel, ensuring the waterproof safety of the tunnel structure.

[0021] (3) By cleverly placing the sensor outside the PVC conduit, it effectively avoids the problem of uneven grouting that may be caused by the wire being inside the pipe. At the same time, it allows the use of a smaller diameter PVC conduit, reducing the intrusion into the surrounding rock and minimizing the negative impact on the tunnel structure.

[0022] (4) Considering the continuity of the construction process, this device is integrated into the construction process during installation, and the equipped rubber sleeve effectively protects the extended wires and prevents accidental damage during subsequent construction.

[0023] (5) Since the design of this utility model cleverly crosses the waterproof board and does not require the wires to bypass, the length of the sensor wires used is shortened, thus improving the construction efficiency.

[0024] (6) This utility model has a simple structure, reasonable cost, and low requirements for equipment. Most tunnel construction project departments can easily meet its material and equipment requirements, achieving efficient and convenient deployment and application. Description of the Drawings

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0026] Figure 1 It is a schematic structural diagram of a surrounding rock temperature measurement device with a waterproof structure;

[0027] Figure 2 It is a parameter marking diagram of a surrounding rock temperature measurement device with a waterproof structure.

[0028] Explanation of the numbers in the figure: 1 PVC conduit, 2 temperature sensor, 3 sensor wire, 4 EVA board, 5 rubber sleeve, 6 hot melt adhesive, 7 primary lining of the tunnel, 8 surrounding rock of the tunnel, 9 cement mortar, 10 epoxy resin potting adhesive, 11 acquisition instrument, 12 wireless transceiver module. Detailed Embodiment

[0029] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the following further details the present application in conjunction with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0030] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0031] In the description of the present application, "a plurality" means two or more, unless otherwise clearly and specifically defined. "Several" means one or more, unless otherwise clearly and specifically defined.

[0032] In the description of the present application, it should be understood that the orientation or positional relationship indicated by terms such as "center", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0033] In the description of the present application, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0034] Example 1

[0035] This example provides a device for monitoring the radial temperature of tunnel surrounding rock, including a temperature measuring device for measuring the temperature of the surrounding rock, a conduit structure for grouting and fixing the sensor, a waterproof structure for filling the gap of the waterproof board, and a sleeve for protecting the wire.

[0036] The temperature measuring device includes a temperature sensor, a sensor wire, and an acquisition system; the temperature sensor is connected to the acquisition system through the sensor wire. The acquisition system includes an acquisition instrument and a wireless transceiver module. After measuring the resistance value of the sensor, the temperature at the installation location of the temperature sensor can be obtained through conversion. The temperature measuring device is installed during the construction stage after the completion of the initial lining of the tunnel and the laying of the tunnel waterproof board, but before the construction of the secondary lining of the tunnel.

[0037] The conduit structure is a PVC conduit. After adhering the temperature sensor to the PVC conduit at a predetermined interval, it is inserted into the hole drilled in the surrounding rock, and cement mortar and epoxy resin sealant are injected into the PVC conduit.

[0038] The waterproof structure includes an EVA board and hot melt adhesive. First, a hole slightly larger than the diameter of the PVC conduit is opened on an EVA waterproof board. After sleeving the PVC conduit, hot melt adhesive is sprayed with a hot melt adhesive gun to fill the gap between the PVC conduit and the hole. The hot melt adhesive with strong fluidity can well fill the gap and improve the waterproof performance of the device.

[0039] The sleeve uses a rubber sleeve to cover the extended sensor wire, so that the sensor wire is prevented from being damaged during subsequent construction and operation.

[0040] In the present utility model, the PVC conduit 1 serves the functions of grouting and fixing the temperature sensor. The temperature sensors are fixed to the outer side of the PVC conduit 1 at certain intervals by using hot melt adhesive. The extended wires 3 are uniformly sleeved in the rubber sleeve 5 to prevent them from being damaged during subsequent construction. The wires are uniformly connected to the collector 11. Technicians can obtain the resistance value of the sensor by sending a collection command to the wireless transceiver module 12. The collected data is sent to the workstation through the wireless transceiver module 12 and stored.

[0041] Holes are opened on the EVA board 4 and it is sleeved on the PVC conduit 1. The gaps between the holes and the PVC conduit 1 are filled with hot melt adhesive sprayed by a hot melt adhesive gun, and then the EVA board 4 is welded to the waterproof board of the tunnel by a welding machine to achieve the purpose of waterproofing.

[0042] The openings on the primary lining 7 and the surrounding rock 8 of the tunnel should be appropriately inclined downward to facilitate subsequent grouting.

[0043] The cement mortar 9 is injected into the pipe through a grouting machine, which can fix the sensor wire in the hole and discharge the air in the hole to make the temperature measurement result more accurate.

[0044] The epoxy resin potting adhesive 10 is injected after the cement mortar 9 is completely solidified, which can prevent water from seeping out from the mortar in the pipe.

[0045] Embodiment 2

[0046] This embodiment provides a method for measuring the temperature of surrounding rock with a waterproof structure, including:

[0047] In the first step, the temperature sensors are adhered to the outer wall of the PVC conduit at a predetermined interval, as Figure 1 shown;

[0048] Specifically, after numbering multiple temperature sensors 2, they are fixed to the outer wall of the PVC conduit 1 at a certain spacing by using hot melt adhesive. At the same time, the sensor wires 3 are fixed to the PVC conduit 1 by tape, and the wires 3 extending out of the hole are embedded in the rubber sleeve 5.

[0049] In the second step, an EVA board made of the same material as the waterproof board of the tunnel is selected, and a hole slightly larger than the hole of the PVC conduit is opened, as Figure 2 shown;

[0050] Specifically, holes are opened on the EVA board, and it is sleeved on the PVC conduit 1, and the gaps are filled with hot melt adhesive 6 sprayed by a hot melt adhesive gun.

[0051] Step 3: Construct the primary lining of the tunnel at the predetermined temperature measurement points. After laying the waterproof board and before the secondary lining of the tunnel is constructed, an inclined duct is opened at the temperature measurement points.

[0052] Specifically, a duct with a diameter slightly larger than that of the PVC duct 1 is drilled on the primary lining 7 of the tunnel and the surrounding rock 8 of the tunnel at a slightly downward inclination angle.

[0053] Step 4: Insert the PVC duct adhered with multiple temperature sensors into the drilled duct.

[0054] Step 5: Inject cement mortar into the PVC duct with a grouting machine until the cement mortar overflows from the duct.

[0055] Step 6: Weld the EVA board adhered to the PVC duct and the waterproof board of the tunnel together with a welding machine to form a waterproof structure.

[0056] Step 7: After the cement mortar is completely solidified, inject epoxy resin potting adhesive into the remaining part of the PVC duct to prevent water from seeping out of the cement mortar in the duct.

[0057] Step 8: Connect the extended sensor wires to the collector 11, and connect the collector 11 to the wireless transceiver module 12.

[0058] When measuring the temperature, by sending a collection command to the wireless transceiver module 12, the collector 11 can be controlled to measure the resistance value of the sensor, and the collected data is sent to the workstation through the wireless transceiver module 12 and stored. The surrounding rock temperature at the installation locations of each temperature sensor 2 can be obtained through subsequent conversion.

[0059] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and are not intended to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A surrounding rock temperature measuring device with a waterproof structure, characterized in that: It includes a temperature measuring device for measuring the temperature of the surrounding rock, a conduit structure for grouting and fixing the temperature measuring device, and a waterproof structure for filling the gap of the waterproof plate, wherein the conduit structure is arranged in the hole of the tunnel surrounding rock; The temperature measuring device comprises a plurality of temperature sensors arranged at intervals, and corresponding sensor wires; The conduit structure is a PVC conduit, a plurality of temperature sensors are adhered to the outer wall of the PVC conduit, and cement mortar is injected into the PVC conduit; The waterproof structure includes an EVA board and hot melt adhesive. A hole slightly larger than the PVC conduit is opened on the EVA board. The EVA board is sleeved on the PVC conduit, and the gap between the PVC conduit and the hole is filled with hot melt adhesive.

2. The surrounding rock temperature measuring device with a waterproof structure according to claim 1, characterized in that: The temperature measuring device is installed after the primary lining of the tunnel is completed and the tunnel waterproofing board is laid, but before the construction of the secondary lining of the tunnel begins.

3. The surrounding rock temperature measuring device with a waterproof structure according to claim 1, characterized in that: Use rubber grommet to cover the sensor wire extending out of the hole.

4. The surrounding rock temperature measuring device with a waterproof structure according to claim 3, characterized in that: A through hole is opened on the EVA board for the rubber sleeve to pass through, and the gap between the rubber sleeve and the through hole is filled with hot melt adhesive.

5. The surrounding rock temperature measuring device with a waterproof structure according to claim 1, characterized in that: Use tape to secure the sensor wire to the outer wall of the PVC conduit.

6. The surrounding rock temperature measuring device with a waterproof structure according to claim 1, characterized in that: The tail of the PVC conduit outside the hole is injected with epoxy resin potting glue.

7. The surrounding rock temperature measuring device with a waterproof structure according to claim 1, characterized in that: The temperature sensor is connected to the wireless transceiver module through a collector, and the workstation obtains the temperature of the location where the temperature sensor is placed through the wireless transceiver module.

8. The surrounding rock temperature measuring device with a waterproof structure according to claim 1, characterized in that: The hole is a downwardly inclined structure.

9. The surrounding rock temperature measuring device with a waterproof structure according to claim 1, characterized in that: The EVA board is made of the same material as the tunnel waterproof board.

10. The surrounding rock temperature measuring device with a waterproof structure according to claim 1, characterized in that: The EVA board is welded to the tunnel waterproof board.

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