Tunnel inverted arch block structure and construction method thereof

Abstract

This disclosure relates to a tunnel invert block structure and its construction method. The tunnel invert block structure includes a prefabricated invert block body. A hollow receiving cavity is provided within the invert block body. The shape of at least a portion of the cavity wall matches the shape of a sensor to be installed. One side of the receiving cavity has a clearance hole for the sensor to enter or exit. The sensor is detachably housed within the receiving cavity. A filling layer is detachably provided within the receiving cavity, located between the outer wall of the sensor and the cavity wall, and abutting against both the sensor and the receiving cavity. A sealing element is detachably provided at the clearance hole, sealingly connected to the hole wall. If the sensor needs to be replaced, the sealing element is first removed; then the filling layer is removed from the clearance hole from the receiving cavity, and the damaged sensor is removed from the clearance hole for replacement. A new sensor is installed within the receiving cavity, and the stress and deformation of the invert block body are continuously monitored. This results in better maintenance and improved user experience.

Description

Technical Field

[0001] This disclosure relates to the field of building engineering technology, and in particular to a tunnel inverted arch block structure and its construction method. Background Technology

[0002] The tunnel structure, along its circumference, includes a top arch and a bottom invert. During tunnel construction, the surrounding rock is excavated first, followed by initial support, then the invert and its backfilling, and finally the secondary lining. The invert is a reverse arch structure at the bottom of the tunnel, installed to improve the stress conditions of the superstructure. It effectively transfers the ground pressure from above the tunnel to the underground via the tunnel sidewall structure or the road surface load, while also effectively resisting the reaction forces from the underlying strata. The invert and secondary lining together form the tunnel as a whole, constituting one of the main components of the tunnel structure and increasing its stability.

[0003] In tunnel invert construction, precast invert blocks are commonly used instead of traditional cast-in-place concrete invert blocks. This method offers numerous advantages, including easier quality control, faster construction speed, better working environment, higher standardization, and fewer construction personnel required. For example, Chinese patent application CN204532368U discloses a precast invert block with two connecting ends. One connecting end has a tenon, and the other has a mortise. The bottom of both connecting ends has grooves, and threaded through holes are formed at the same height from the bottom surface, extending from the end face of the connecting end to the grooves.

[0004] In related technologies, to accurately monitor the stress and deformation of the precast invert blocks, pressure sensors are typically cast directly into the invert blocks during precasting, forming an integrated structure with the invert block mold. Since the lifespan of these sensors is usually far shorter than the service life of the tunnel structure, damaged sensors within the precast invert blocks need to be replaced during the tunnel structure's engineering life. However, in existing technologies, once a sensor within the precast invert block is damaged, it cannot be replaced, and the stress and deformation of the invert block cannot be monitored, impacting maintenance efficiency and resulting in a poor user experience. Summary of the Invention

[0005] In order to solve the above-mentioned technical problems, or at least partially solve the above-mentioned technical problems, this disclosure provides a tunnel inverted arch block structure and its construction method.

[0006] In one aspect, this disclosure provides a tunnel invert block structure, including a prefabricated invert block body;

[0007] The inverted arch block body is provided with a hollow receiving cavity. The shape of at least part of the cavity wall matches the shape of the sensor to be installed. One side of the receiving cavity has a clearance hole for the sensor to enter or move out. The sensor is detachably housed in the receiving cavity.

[0008] A filling layer is detachably provided inside the receiving cavity. The filling layer is located between the outer wall of the sensor and the cavity wall of the receiving cavity, and abuts against both the outer wall of the sensor and the cavity wall of the receiving cavity.

[0009] A sealing element is provided at the clearance hole in an openable and closable manner. The shape of the sealing element matches the shape of the clearance hole, and the sealing element is sealed to the hole wall of the clearance hole.

[0010] Optionally, the filling layer is filled with particles, and a pressure box is provided inside the receiving cavity;

[0011] The pressure box has multiple perforated holes spaced apart. The sensor is located inside the pressure box. The filling particles enter the pressure box through the perforated holes to abut against the outer wall of the sensor.

[0012] Optionally, the receiving cavity includes a first cavity and a second cavity that are connected, the first cavity being located on one side of the second cavity, the shape of the first cavity matching the shape of the sensor, and the pressure box covering the sensor being located within the first cavity.

[0013] Optionally, the receiving cavity has two opposing cavity walls, each of which has a clearance hole, and the clearance holes on both cavity walls are covered with the sealing element.

[0014] Optionally, the sensor is provided with a data line, which is electrically connected to the sensor. The sealing member has an opening for the data line to pass through, and the shape of the opening matches the shape of the circumferential outer wall of the data line. The data line is sealed to the wall of the opening.

[0015] Optionally, at least two of the receiving cavities are provided at intervals on the arch block body, and the two adjacent receiving cavities are sealed together.

[0016] Optionally, the filling layer is sand;

[0017] The sealing component is a plaster cap or a cement cap cast from concrete.

[0018] Secondly, this disclosure provides a construction method for a tunnel inverted arch block structure, the construction method including;

[0019] Constructing molds for the precast inverted arch block structure;

[0020] A hollow receiving cavity is provided inside the mold;

[0021] Concrete is poured into the mold to form a prefabricated inverted arch block body, wherein the cavity wall of the receiving cavity inside the inverted arch block body is provided with clearance holes for the sensor to be installed to enter or move out.

[0022] Place the sensor into the receiving cavity through the clearance hole;

[0023] A filling layer is provided between the outer wall of the sensor and the cavity wall of the receiving cavity, and the filling layer abuts against both the outer wall of the sensor and the cavity wall of the receiving cavity;

[0024] A sealing element is provided at the clearance hole to seal the clearance hole.

[0025] Optionally, after pouring concrete into the mold to form a prefabricated inverted arch block body, wherein the cavity wall of the receiving cavity within the inverted arch block body is provided with clearance holes for the sensor to be installed to enter or exit, the construction method further includes:

[0026] Clean the impurities inside the receiving cavity;

[0027] Optionally, before the step of providing a filling layer between the outer wall of the sensor and the cavity wall of the receiving cavity, and ensuring that the filling layer abuts against both the outer wall of the sensor and the cavity wall of the receiving cavity, the construction method further includes:

[0028] An adhesive layer is provided on the outer wall of the sensor, and the side of the adhesive layer facing away from the sensor is fixedly connected to the filling layer.

[0029] The technical solution provided in this disclosure has the following advantages compared with the prior art:

[0030] The tunnel invert block structure and its construction method disclosed herein involve setting up a prefabricated invert block body and a hollow receiving cavity within the invert block body. At least a portion of the cavity wall's shape matches the shape of the sensor to be installed. A clearance hole is provided on one side of the receiving cavity for the sensor to enter or exit. The sensor is detachably housed within the receiving cavity, and a detachably disposed filling layer is located between the outer wall of the sensor and the cavity wall, abutting against both. This allows the force on the invert block body to be transmitted to the sensor through the filling layer, enabling the sensor to collect stress signals from the invert block body to provide feedback on its stress deformation. A sealing element is detachably disposed within the clearance hole, its shape matching the shape of the clearance hole, and the sealing element is sealed to the hole wall. In practical use, if the sensor in the receiving cavity is damaged and needs to be replaced, first disassemble the sealing part to open the clearance hole; then remove the filling layer from the clearance hole and take out the damaged sensor from the clearance hole. This allows the damaged sensor to be disassembled and separated from the prefabricated invert block body for replacement. A new sensor can then be installed in the receiving cavity inside the invert block body, allowing continued monitoring of the stress and deformation of the invert block body. Compared with the existing technology where the pressure sensor is directly cast into the invert block body to form an integrated structure, the tunnel invert block structure of this embodiment, by setting a hollow receiving cavity in the prefabricated invert block body and detachably connecting the sensor in the receiving cavity, allows the sensor to be disassembled and replaced when damaged, thus allowing continued monitoring of the stress and deformation of the tunnel invert block structure. This results in better operation and maintenance and improves the user experience. Attached Figure Description

[0031] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure.

[0032] To more clearly illustrate the technical solutions in the embodiments of this disclosure or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 This is a schematic diagram of the tunnel inverted arch block structure described in the embodiments of this disclosure;

[0034] Figure 2 for Figure 1 Enlarged view of section A in the middle;

[0035] Figure 3 This is a partial structural diagram of the tunnel invert block structure described in an embodiment of this disclosure;

[0036] Figure 4 This is a top view of the tunnel inverted arch block structure described in the embodiments of this disclosure;

[0037] Figure 5 This is a schematic flowchart of the construction method for the tunnel inverted arch block structure described in the embodiments of this disclosure.

[0038] Among them, 1. Inverted arch block body; 2. Receiving cavity; 21. First cavity; 22. Second cavity; 3. Avoidance hole; 4. Filling layer; 5. Sealing component; 6. Pressure box; 7. Drainage ditch; 8. Data cable; 9. Sensor. Detailed Implementation

[0039] To better understand the above-mentioned objectives, features, and advantages of this disclosure, the solutions disclosed herein will be further described below. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0040] Numerous specific details are set forth in the following description in order to provide a full understanding of this disclosure, but this disclosure may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only some, and not all, of the embodiments of this disclosure.

[0041] Example 1

[0042] refer to Figures 1 to 4 As shown, this embodiment provides a tunnel invert block structure, including a prefabricated invert block body 1. A hollow receiving cavity 2 is provided inside the invert block body 1. The shape of at least a portion of the cavity wall of the receiving cavity 2 matches the shape of the sensor 9 to be installed. One side of the receiving cavity 2 has a clearance hole 3 for the sensor 9 to enter or exit. The sensor 9 is detachably received within the receiving cavity 2. A filling layer 4 is detachably provided inside the receiving cavity 2. The filling layer 4 is located between the outer wall of the sensor 9 and the cavity wall of the receiving cavity 2, and abuts against both the outer wall of the sensor 9 and the cavity wall of the receiving cavity 2. A sealing member 5 is detachably provided at the clearance hole 3. The shape of the sealing member 5 matches the shape of the clearance hole 3, and the sealing member 5 is sealed to the hole wall of the clearance hole 3 and abuts against the filling layer 4.

[0043] Among them, after the inverted arch block body 1 is pre-formed, it has a hollow receiving cavity 2 inside. The cavity wall of the receiving cavity 2 has a clearance hole 3. The receiving cavity 2 is connected to the outside through the clearance hole 3. The receiving cavity 2 is used to install the sensor 9.

[0044] In practice, the sensor 9 is first placed in the receiving cavity 2 through the clearance hole 3. Then, the receiving cavity 2 is filled with a filling layer 4, which is located between the outer wall of the sensor 9 and the cavity wall of the receiving cavity 2, and the filling layer 4 abuts against both the outer wall of the sensor 9 and the cavity wall of the receiving cavity 2. That is, the filling layer 4 fixes the sensor 9 in the receiving cavity, making the sensor 9 relatively fixed to the arch block body 1. Finally, a sealing member 5 is installed in the clearance hole 3 to seal the clearance hole 3, and the sealing member 5 abuts against the filling layer 4.

[0045] In practical use, a filling layer 4 is compacted between the sensor 9 and the cavity wall of the receiving cavity 2. The side of the filling layer 4 facing the sensor 9 abuts against the sensor 9, and the side of the filling layer 4 away from the sensor 9 abuts against the cavity wall of the receiving cavity 2. The sensor 9 is not only stably and firmly fixed in the receiving cavity 2 by the filling layer 4, but the filling layer 4 also has a force transmission function between the sensor 9 and the inverted arch block body 1, so that the force on the inverted arch block body 1 can be transmitted to the sensor 9 through the filling layer 4. In this way, the sensor 9 can collect the stress signal of the inverted arch block body 1 to provide feedback on the stress deformation of the inverted arch block body 1.

[0046] If the sensor 9 inside the invert block body 1 is damaged and needs to be replaced, first disassemble and open the sealing part 5 to open the clearance hole 3. Then, remove the filling layer 4 from the clearance hole 3 out of the receiving cavity 2. At this time, there is a gap between the sensor 9 and the cavity wall of the receiving cavity 2, which allows the sensor 9 to loosen in the receiving cavity 2 and be easily removed. Finally, remove the damaged sensor 9 from the clearance hole 3, thereby removing the damaged sensor 9 from the prefabricated invert block body 1.

[0047] After the damaged sensor 9 is removed from the prefabricated invert block body 1, a new sensor 9 is placed into the receiving cavity. A filling layer 4 is installed in the receiving cavity, with the side of the filling layer 4 facing the sensor 9 abutting against the sensor 9, and the side of the filling layer 4 facing away from the sensor 9 abutting against the cavity wall of the receiving cavity 2. Finally, a sealing piece 5 is installed in the clearance hole 3 to fix the new sensor in the receiving cavity 2, thus realizing the replacement of sensor 9. The installation and disassembly are convenient. The new sensor can continue to monitor the stress deformation of the invert block body 1, improving the operation and maintenance efficiency and enhancing the user experience.

[0048] In some implementations, the sealing element 5 is usually provided with a clearance hole 3 for the data line 8 of the sensor 9 to pass through.

[0049] In practice, the inverted arch block body 1 usually has a drainage groove 7, and the receiving cavity 2 is usually set at the drainage groove 7 of the inverted arch block body 1 to facilitate the replacement of the sensor 9.

[0050] The tunnel invert block structure and its construction method disclosed herein involve setting up a prefabricated invert block body 1, and a hollow receiving cavity 2 within the invert block body 1. The shape of at least a portion of the cavity wall of the receiving cavity 2 matches the shape of the sensor 9 to be installed. A clearance hole 3 is provided on one side of the receiving cavity 2 for the sensor 9 to enter or exit. The sensor 9 is detachably housed within the receiving cavity 2, and a filling layer 4 is detachably provided within the receiving cavity 2. The filling layer 4 is located between the outer wall of the sensor 9 and the cavity wall of the receiving cavity 2, and abuts against both the outer wall of the sensor 9 and the cavity wall of the receiving cavity 2. Thus, the force on the invert block body 1 can be transmitted to the sensor 9 through the filling layer 4, allowing the sensor 9 to collect the stress signal of the invert block body 1 to provide feedback on the stress deformation of the invert block body 1. A sealing element 5 is detachably provided within the clearance hole 3, the shape of the sealing element 5 matching the shape of the clearance hole 3, and the sealing element 5 is sealed to the hole wall of the clearance hole 3. In practical use, if the sensor 9 in the receiving cavity 2 is damaged and needs to be replaced, first disassemble the sealing part 5 to open the clearance hole 3; then remove the filling layer 4 from the clearance hole 3 out of the receiving cavity 2, and then take out the damaged sensor 9 from the clearance hole 3. Thus, the damaged sensor 9 can be disassembled and separated from the prefabricated invert block body 1 for replacement. A new sensor can then be installed in the receiving cavity 2 inside the invert block body 1, and the stress deformation of the invert block body 1 can continue to be monitored. Compared with the existing technology where the pressure sensor 9 is directly cast into the invert block body 1 to form an integrated structure, the tunnel invert block structure of this embodiment, by setting a hollow receiving cavity 2 in the prefabricated invert block body 1 and detachably connecting the sensor 9 to the receiving cavity 2, allows the sensor 9 to be disassembled and replaced when damaged, thus continuing to monitor the stress deformation of the tunnel invert block structure. The operation and maintenance effect is better, and the user experience is improved.

[0051] In some embodiments, an adhesive layer is provided between the sensor 9 and the filling layer 4. The side of the adhesive layer facing the sensor 9 is fixedly connected to the sensor 9, and the side of the adhesive layer away from the sensor 9 is fixedly connected to the filling layer 4.

[0052] By setting an adhesive layer between the sensor 9 and the filling layer 4, the side of the filling layer 4 facing the sensor 9 is fixedly connected to the sensor 9 using the adhesive layer. This makes the filling layer 4 stably and firmly connected to the sensor 9. On the one hand, it improves the force transmission between the filling layer 4 and the sensor 9, thereby improving the force acquisition performance of the sensor 9 on the inverted arch block body 1. On the other hand, it improves the stability of the sensor 9 within the receiving cavity 2, to a certain extent preventing the sensor 9 from shaking within the receiving cavity 2, and helping to extend the service life of the sensor 9.

[0053] In practice, the adhesive layer can be fixed to the outer wall of the sensor 9.

[0054] In some embodiments, the adhesive layer may be, for example, glue, which has a simple structure and is easy to implement. By uniformly coating the glue on the outer surface of the sensor 9, the sensor 9 can be in full contact with the filling layer 4, thereby fixing the sensor 9 more stably in the receiving cavity 2.

[0055] In some embodiments, the filling layer 4 may be, for example, filling particles. (See reference...) Figure 2 and Figure 3 As shown, a pressure box 6 is provided inside the cavity 2. Multiple perforated holes are spaced apart on the pressure box 6. The sensor 9 is located inside the pressure box 6. The filling particles enter the pressure box 6 through the perforated holes to abut against the outer wall of the sensor 9.

[0056] A pressure box 6 is installed inside the receiving cavity 2. The pressure box 6 has multiple perforated holes spaced apart, making it a perforated pressure box. The inner cavity of the pressure box 6 communicates with the receiving cavity 2 through these perforations. The sensor 9 is placed inside the pressure box 6, allowing the filling particles to pass through the perforations and enter the inner cavity of the pressure box 6. This achieves abutting connection between the filling particles and the sensor 9, improving the stability of the sensor 9 within the receiving cavity 2 and thus enhancing its force acquisition performance on the inverted arch block body 1. Simultaneously, the pressure box 6 provides some protection for the sensor 9, extending its service life to a certain extent.

[0057] In some embodiments, reference Figure 2 As shown, the receiving cavity 2 includes a first cavity 21 and a second cavity 22 that are connected. The first cavity 21 is located on one side of the second cavity 22. The shape of the first cavity 21 matches the shape of the sensor 9. The pressure box 6 covering the sensor 9 is located inside the first cavity 21.

[0058] By dividing the receiving cavity 2 into a connected first cavity 21 and a second cavity 22, and matching the shape of the first cavity 21 with the shape of the sensor 9, the sensor 9 is placed inside the first cavity 21. This reduces the gap between the sensor 9 and the cavity of the first cavity 21 to a certain extent, which helps to improve the accuracy of the sensor 9 in collecting the force of the inverted arch block body 1.

[0059] In some embodiments, reference Figure 3 As shown, the receiving cavity 2 has two opposing cavity walls, both of which are provided with clearance holes 3, and both clearance holes 3 are covered with sealing parts 5. In this way, the sensor 9 can be installed or removed from either suitable side of the receiving cavity 2, which improves the convenience of replacement and installation and makes the work efficiency higher.

[0060] In some embodiments, reference Figure 2 and Figure 3 As shown, a data line 8 is provided on the sensor 9, and the data line 8 is electrically connected to the sensor 9. The sealing member 5 has an opening for the data line 8 to pass through, and the shape of the opening matches the shape of the circumferential outer wall of the data line 8. The data line 8 is sealed to the wall of the opening.

[0061] By setting a data line on the sensor 9, the sensor 9 can transmit signals to the outside through the data line 8. The signal transmission is stable and reliable, and it is easy to use, which extends the service life of the sensor 9 to a certain extent.

[0062] By setting an opening in the sealing component 5, the data cable 8 is passed through the opening. The outer wall of the data cable 8 is sealed to the wall of the opening, ensuring the stability of the filling layer 4 in the receiving cavity 2, so that it abuts against the wall of the receiving cavity and the sensor 9 respectively, thereby further ensuring the accuracy of the sensor 9 in collecting pressure.

[0063] In some embodiments, at least two receiving cavities 2 are provided on the arch block body 1 at intervals, and two adjacent receiving cavities 2 are sealed together.

[0064] In other words, multiple receiving cavities 2 can be set on the invert block body 1. The multiple receiving cavities 2 are spaced apart in the invert block body 1. Each receiving cavity 2 can be equipped with a pressure sensor 9. That is, the number of receiving cavities 2 corresponds one-to-one with the number of sensors 9 to be installed, which makes it easy to replace the damaged sensors 9.

[0065] In some embodiments, the filling layer 4 may be, for example, sand. Sand is easy to fill and pour out, which facilitates the installation and removal of the sensor 9. After filling, it has good hardness and good force transmission.

[0066] In practice, the sealing component 5 is a gypsum board cover or a cement cover cast from concrete, which has good sealing performance and is easy to install and disassemble.

[0067] In some other implementations, the sealing element 5 can also be a wooden board.

[0068] Example 2

[0069] refer to Figures 1 to 5 As shown, this embodiment also provides a construction method for a tunnel invert block structure. This method can be performed by part or all of the tunnel invert block structure described in the above embodiment. By setting a hollow receiving cavity 2 inside the prefabricated invert block body 1, and detachably connecting the sensor 9 inside the receiving cavity 2, the sensor 9 can be disassembled and replaced when damaged, so that a new sensor can be installed inside the receiving cavity 2 of the invert block body 1, thereby continuing to monitor the stress deformation of the invert block body 1. The operation and maintenance effect is better, and the user experience is improved.

[0070] refer to Figure 5 As shown, the method includes:

[0071] S101. Construct the mold for the precast inverted arch block structure.

[0072] S102. A hollow receiving cavity 2 is provided inside the mold.

[0073] S103. Concrete is poured into the mold to form a prefabricated inverted arch block body 1. The cavity wall of the receiving cavity 2 inside the inverted arch block body 1 is provided with a clearance hole 3 for the sensor 9 to be installed to enter or move out, thereby forming an inverted arch block body 1 with a receiving cavity 2 inside. The cavity wall of the receiving cavity 2 is also provided with a clearance hole 3 for the replacement of the sensor 9.

[0074] Furthermore, after step S103, the method further includes cleaning impurities in the receiving cavity 2 in order to improve the accuracy of the sensor 9 in collecting stress on the inverted arch block body 1.

[0075] S104. Place the sensor 9 into the receiving cavity 2 at the self-avoidance hole 3.

[0076] S105. A filling layer 4 is provided between the outer wall of the sensor 9 and the cavity wall of the receiving cavity 2, and the filling layer 4 abuts against both the outer wall of the sensor 9 and the cavity wall of the receiving cavity 2.

[0077] Furthermore, prior to step S105, an adhesive layer is provided on the outer wall of the sensor 9. The side of the adhesive layer facing away from the sensor 9 is fixedly connected to the filling layer 4. This improves the force transmission between the filling layer 4 and the sensor 9, thereby enhancing the sensor 9's force acquisition performance on the arch block body 1. It also improves the stability of the sensor 9 within the receiving cavity 2, preventing the sensor 9 from shaking within the cavity 2 and helping to extend the service life of the sensor 9.

[0078] S106. A sealing element 5 is installed at the clearance hole 3 to seal the clearance hole 3.

[0079] The specific technical features are the same as those in the above embodiments and can bring the same or similar technical effects, and will not be repeated here. Please refer to the description of the above embodiments for details.

[0080] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0081] The above description is merely a specific embodiment of this disclosure, enabling those skilled in the art to understand or implement it. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this disclosure. Therefore, this disclosure is not to be limited to the embodiments described herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A tunnel inverted arch block structure, characterized in that, Includes the prefabricated inverted arch block body (1); The arch block body (1) is provided with a hollow receiving cavity (2). At least part of the cavity wall of the receiving cavity (2) is matched with the shape of the sensor (9) to be installed. One side of the receiving cavity (2) has a clearance hole (3) for the sensor (9) to enter or move out. The sensor (9) is detachably housed in the receiving cavity (2). A filling layer (4) is detachably provided inside the receiving cavity (2). The filling layer (4) is located between the outer wall of the sensor (9) and the cavity wall of the receiving cavity (2), and abuts against both the outer wall of the sensor (9) and the cavity wall of the receiving cavity (2). A sealing element (5) is provided in the clearance hole (3) in an openable manner. The shape of the sealing element (5) matches the shape of the clearance hole (3), and the sealing element (5) is sealed to the hole wall of the clearance hole (3) and abuts against the filling layer (4).

2. The tunnel invert block structure according to claim 1, characterized in that, The filling layer (4) is filled with particles, and a pressure box (6) is provided inside the receiving cavity (2); The pressure box (6) has a plurality of perforated holes spaced apart. The sensor (9) is located inside the pressure box (6). The filling particles enter the pressure box (6) through the perforated holes to abut against the outer wall of the sensor (9).

3. The tunnel invert block structure according to claim 2, characterized in that, The receiving cavity (2) includes a first cavity (21) and a second cavity (22) that are connected. The first cavity (21) is located on one side of the second cavity (22). The shape of the first cavity (21) matches the shape of the sensor (9). The pressure box (6) covering the sensor (9) is located inside the first cavity (21).

4. The tunnel invert block structure according to claim 1, characterized in that, The receiving cavity (2) has two opposing cavity walls, both of which are provided with clearance holes (3), and both clearance holes (3) on the cavity walls are covered with sealing members (5).

5. The tunnel invert block structure according to claim 1, characterized in that, The sensor (9) is provided with a data line (8), which is electrically connected to the sensor (9). The sealing member (5) has an opening for the data line (8) to pass through, and the shape of the opening matches the shape of the circumferential outer wall of the data line (8). The data line (8) is sealed to the wall of the opening.

6. The tunnel invert block structure according to any one of claims 1 to 5, characterized in that, At least two receiving cavities (2) are provided at intervals on the inverted arch block body (1), and the two adjacent receiving cavities (2) are sealed together.

7. The tunnel invert block structure according to any one of claims 1 to 5, characterized in that, The filling layer (4) is sand; The sealing component (5) is a gypsum board cover or a cement cover formed by concrete pouring.

8. A construction method for a tunnel invert block structure as described in any one of claims 1 to 7, characterized in that, The construction method includes; Constructing molds for the precast inverted arch block structure; A hollow receiving cavity is provided inside the mold; Concrete is poured into the mold to form a prefabricated inverted arch block body, wherein the cavity wall of the receiving cavity inside the inverted arch block body is provided with clearance holes for the sensor to be installed to enter or move out. Place the sensor into the receiving cavity through the clearance hole; A filling layer is provided between the outer wall of the sensor and the cavity wall of the receiving cavity, and the filling layer abuts against both the outer wall of the sensor and the cavity wall of the receiving cavity; A sealing element is provided at the clearance hole to seal the clearance hole.

9. The construction method of the tunnel invert block structure according to claim 8, characterized in that, After pouring concrete into the mold to form a precast inverted arch block body, wherein the cavity wall of the receiving cavity within the inverted arch block body is provided with clearance holes for sensors to be installed to enter or exit, the construction method further includes: Clean the impurities inside the receiving cavity.

10. The construction method of the tunnel invert block structure according to claim 8, characterized in that, Before the step of providing a filling layer between the outer wall of the sensor and the cavity wall of the receiving cavity, and ensuring that the filling layer abuts against both the outer wall of the sensor and the cavity wall, the construction method further includes: An adhesive layer is provided on the outer wall of the sensor, and the side of the adhesive layer facing away from the sensor is fixedly connected to the filling layer.

Images