A method for quickly detecting and repairing damage and cracks of an outer wall of an underwater suspended tunnel

Abstract

The application discloses a kind of underwater suspended tunnel outer wall damage and crack fast detection repair method, belong to tunnel safety technical field.The method is first along tunnel pipe wall cross section to arrange drive system, then by drive system carried sonar system detects pipe wall crack, the scanning mode of sonar system includes two kinds of modes of helical full aspect scanning and continuous sampling local enhancement scanning, after locating crack according to sonar detection imaging, switch to grouting system to carry out high-pressure grouting to pipe wall crack to fill and repair.The application can realize the fast detection positioning and repair of tunnel outer wall crack in the construction and use process of underwater suspended tunnel, avoid causing leakage and other problems to cause tunnel damage and other safety hazards.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of tunnel safety, and particularly relates to a method for quickly detecting and repairing damage and cracks of an outer wall of an underwater suspended tunnel. BACKGROUND

[0002] In recent years, with the rapid construction of cities in China and the continuous increase in population, traffic travel is under great pressure. Traditional land transportation cannot meet the requirements of modern development, so the construction of underwater tunnel projects is of great significance to economic development. The research on suspended tunnels has a history of several decades, and the successful application of suspended tunnels will make them the tunnel with the lowest construction cost. A suspended tunnel refers to a tubular structure that is suspended at a suitable water depth position through the balance of water buoyancy and anchoring force.

[0003] Since the key construction and operational use of the suspended tunnel project are implemented underwater, the underwater concealed engineering is invisible, and it is of great significance to ensure the safety and quality of the suspended tunnel to detect and repair the tunnel during construction and use. For a suspended tunnel, the waterproof problem of the tunnel pipe section is crucial to the construction of the tunnel. During underwater pipe section butt joint sinking and use, the tunnel pipe section may be affected by underwater undercurrents and attacked by large animals, thereby causing cracks and leakage of the tunnel pipe section, and ultimately leading to deformation and damage of the tunnel, which is disastrous for underwater tunnel projects.

[0004] At present, the control of underwater tunnel waterproof leakage mainly focuses on the monitoring of the butt joint section, and there is still a lack of a timely detection and effective repair method for cracks in the outer wall of the suspended tunnel pipe section during construction and use. SUMMARY

[0005] The present application aims to overcome the shortcomings of the prior art and provide a method for quickly detecting and repairing damage and cracks of an outer wall of an underwater suspended tunnel, which can to some extent avoid the influence on subsequent construction of the project and reduce the probability of engineering accidents during the operation stage.

[0006] The purpose of the present application is achieved by the following technical solution: a method for quickly detecting and repairing damage and cracks of an outer wall of an underwater suspended tunnel, comprising the following steps:

[0007] (1) installing a driving system on each tunnel pipe section;

[0008] The driving system is used to carry a detection and repair device composed of a sonar system and a grouting system;

[0009] The driving system is arranged in a ring-shaped driving track in the circumferential direction on the cross section of the two ends of the tunnel pipe section, driving cars are arranged on the two end driving tracks, and a transmission rod is used to connect the two end driving cars to form a horizontal track in the axial direction.

[0010] (2) installing the detection and repair device on the transmission rod of the driving system to realize the integration of the sonar system, the driving system and the grouting system, and to realize the free switching use of the sonar system and the grouting system on the driving system;

[0011] (3) the working process of the sonar system includes two parts:

[0012] The spiral full-scan mode is adopted, specifically, the detection and repair device is stepped along the axial track of the tunnel at a certain speed, and is rotated along the circumferential track of the tunnel at a certain angular speed, so as to form the full-scan of the outer wall of the tunnel, and to detect the damage and crack conditions;

[0013] When the sonar system finds that there is a disease in the measurement area, the continuous sampling local enhanced scanning mode is switched, specifically, the disease area is locally enhanced scanned through the axial fixed interval and the circumferential continuous sampling form, so as to accurately locate the disease point and form a clear three-dimensional image;

[0014] After the disease point is determined, the computer system is immediately fed back, the disease point is judged according to the image, and repair processing is performed;

[0015] (4) the sonar system is switched to the grouting system, the disease area is grouted and repaired, and the whole detection and repair work is completed after the grout reaches the required strength.

[0016] Further, the implementation of the spiral full-scan mode includes: the driving system steps the detection and repair device along the transmission rod at a certain speed in the axial direction, and the stepping speed is not more than 0.10 m / min; at the same time, the driving system rotates the detection and repair device along the circumferential track of the tunnel at a certain angular speed, and the rotating angular speed is not more than 0.30 rad / min, thereby forming a spiral full-scan, which is conducive to quickly and accurately exploring the damage and crack conditions of the outer wall of the tunnel.

[0017] Further, the axial fixed interval sampling distance of the continuous sampling local enhanced scanning mode is 0.5 m, and then the circumferential continuous sampling form is adopted, which is conducive to accurately locating the disease point and forming a clear three-dimensional image.

[0018] Further, the sonar system includes a probe shell, a sonar probe body arranged in the probe shell and electronic elements for processing data; a single-beam mechanical scanning sonar is adopted to scan and image all directions around the sonar transducer, when the sound wave meets the object or the seabed, the echo is reflected, the echo signal is received by the sonar, and the image is formed according to the signal delay and intensity; then the sonar probe is rotated at a certain angle, and the emission and reception process is repeated again.

[0019] Further, in the detection process, the sonar probe should stop at a specified interval and a pipe wall disease area according to the specification of the detected tunnel pipe section, and data should be collected at the fixed point, and the stop time should be greater than a scanning period.

[0020] Further, the operation steps of the grouting system include: after the crack is positioned according to the sonar detection imaging, the grouting liquid is added to a grouting liquid storage tank, then the sonar probe is switched to a grouting port, the crack point is high-pressure grouted through a pressurizing device, and the grouting rate, pressure and grouting amount are controlled according to the actual crack range and size.

[0021] Further, the grouting material of the grouting system adopts an expansion type non-water reaction type high polymer material, the high polymer slurry material is injected from the grouting port to the disease site, and after grouting, the slurry volume will rapidly expand and generate a high-strength and high-toughness foamed polymer solid, so as to rapidly fill the crack cavity, and the purpose of anti-seepage and leakage stopping and stability reinforcement is achieved.

[0022] The beneficial effects of the present application are: in the construction and use process of the underwater suspended tunnel, the cracks in the outer wall of the tunnel are quickly detected, positioned and repaired through the driving system, the sonar system and the grouting system; the driving system is used for carrying the sonar system and the grouting system to detect and repair the cracks in the pipe wall in all directions; the single-beam mechanical scanning sonar is used to emit sound pulses in all directions around, and positioning and imaging are performed according to the delay and intensity of the echo signals; the grouting material adopts a non-water reaction type high polymer material, which can rapidly expand and solidify under the condition of not reacting with water, so as to achieve the effect of rapid filling. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is a schematic diagram of the underwater suspended tunnel outer wall damage and crack quick detection and repair provided by the embodiment of the present application. DETAILED DESCRIPTION

[0024] In order to better understand the technical solutions of the present application, the embodiments of the present application will be described in detail below with reference to the drawings.

[0025] It should be clear that the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the present application.

[0026] The terms used in the embodiments of the present application are only for the purpose of describing the specific embodiments, and are not intended to limit the present application. The singular forms "a", "said" and "the" used in the embodiments of the present application and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise.

[0027] In the construction and operation process of the underwater suspended tunnel, in view of the damage and cracking problem that may occur on the outer wall of the pipe, it is necessary to carry out rapid and effective detection and repair to avoid causing leakage and other problems to cause damage to the tunnel and other safety hazards, and the application provides a kind of underwater suspended tunnel outer wall damage and crack rapid detection and repair method, as shown in Figure 1 The main steps are as follows:

[0028] (1) Install the driving system on each tunnel pipe section 1, the driving system is used to carry the detection and repair device composed of the sonar system and the grouting system, and the pipe wall is detected and repaired in all directions.

[0029] Specifically, the driving system is arranged in the form of a ring-shaped driving track 2 on the cross section of the two ends of the tunnel pipe section, i.e. circumferentially, driving cars 3 are arranged on the two end driving tracks, and transmission rods 4 are used to connect the two end driving cars to form a horizontal track in the axial direction.

[0030] (2) Install the detection and repair device on the transmission rod of the driving system to realize the integration of the sonar system, the driving system and the grouting system, and realize the free switching use of the sonar system and the grouting system on the driving system.

[0031] (3) The working process of the sonar system includes two parts:

[0032] First, the spiral full-scan mode is used to detect the outer wall of the tunnel, specifically: stepping along the tunnel axial track at a certain speed, and rotating along the tunnel circumferential track at a certain angular speed, forming a full-scan of the outer wall of the tunnel, detecting the damage and crack conditions;

[0033] When the sonar system finds that there are damage, crack and other disease conditions in the measurement area, the continuous sampling local enhanced scanning mode is changed, specifically: through the axial fixed interval and the circumferential continuous sampling form, the disease area is locally enhanced scanned, the disease point is accurately positioned and a clear three-dimensional image is formed;

[0034] After determining the disease point, the computer system is fed back immediately, the disease point is judged according to the image and repaired.

[0035] (4) Switch the sonar system to the grouting system to repair the disease area, and complete all work contents after the slurry reaches the required strength.

[0036] In one embodiment, the implementation of the spiral full-scan mode includes: the driving system can make the detection and repair device step in the axial direction along the transmission rod at a certain speed, and the step speed should not be more than 0.10 m / min; at the same time, the driving system can make the detection and repair device rotate along the circumferential orbit of the tunnel at a certain angular speed, and the angular speed of the circumferential orbit of the tunnel should not be more than 0.30 rad / min, so as to form a spiral full-scan of the pipe wall by combining the axial step and the angular speed rotation, which is beneficial to quickly and accurately find out the damage and crack conditions of the outer wall of the tunnel.

[0037] When the spiral full-scan mode is used to detect the disease area, the axial fixed interval and the circumferential continuous sampling form are changed to locally enhance the scanning of the disease area; the axial fixed interval sampling distance is 0.5 m, and then the circumferential continuous sampling form is used, which is beneficial to accurately positioning the disease point and forming a clear three-dimensional image.

[0038] The sonar system and the grouting system can be replaced with each other to realize the switching of the detection and repair functions.

[0039] In one embodiment, the sonar system mainly includes a probe shell, a sonar probe 5 arranged in the probe shell, and electronic elements for processing data. When the sonar system is used for scanning, if it is found that there is a disease in the measurement area, the disease area is locally scanned. The scanning instrument used is MS1000 scanning sonar, which is a single-beam mechanical scanning sonar, can scan and image all around the sonar transducer, and the fan-shaped beam transducer emits sound pulses at a beam angle of 0.9°x30°, with a frequency of 675 kHz. When the sound wave meets an object or the seabed, it will reflect a return wave. After the return wave signal is received by the sonar, an image is formed according to the signal delay and intensity. Then the sonar probe rotates at a certain angle, and the emission and reception process is repeated again. During the detection process, the probe should stop advancing at a specified interval and in the pipe wall disease area according to the specifications of the tunnel pipe section to be detected, and the data should be collected at the fixed point. The stop time should be greater than one scanning period. According to the characteristics of the sonar probe itself and engineering experience, accurate imaging can be achieved when the scanning range is less than 0.5 m.

[0040] In one embodiment, the main operation steps of the grouting system are as follows: after the crack is located by the sonar detection imaging, the grout is added to the grouting liquid storage tank 6, and then the sonar probe 5 is switched to the grouting port 7. The grouting port 7 and the grouting liquid storage tank 6 are connected through the grouting channel 8. The crack point is grouted at high pressure through the pressurizing device, and the rate, pressure and amount of grouting are controlled according to the actual crack range and size.

[0041] The grouting material is an expansion type non-water reaction high polymer material, which has the advantages of fast reaction, high expansion ratio, stable water plugging performance, good environmental protection performance and the like. The high polymer slurry material is injected from the grouting port to the disease position, and after grouting, the slurry volume will rapidly expand and generate a high-strength and high-toughness foam-shaped polymer solid, so as to quickly fill the fissure cavity, and achieve the purposes of anti-seepage and leakage plugging and stability reinforcement.

[0042] In general, polyurethane, epoxy resin and other materials reacting with water are often used for repair treatment, so as to achieve the effect of plugging the crack channel. However, due to the long reaction time of such materials with water, and the disturbance caused by grouting in the water flow environment, the treatment effect is very poor, and basically when reacting with water, the materials are washed out of the structure by the water flow, and cannot achieve the plugging effect. The main feature of the non-water reaction high polymer material is that the material itself reacts and expands and solidifies, and does not need the participation of the on-site medium in the reaction, so it is suitable for both water environment and non-water environment.

[0043] The above only describes the preferred embodiments of one or more embodiments of the present specification, and does not limit one or more embodiments of the present specification. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of one or more embodiments of the present specification shall be included in the protection scope of one or more embodiments of the present specification.

Claims

1. A method for rapid detection and repair of damage and cracks in the outer wall of an underwater suspended tunnel, characterized in that, The method comprises the following steps: (1) installing a driving system on each tunnel pipe section; The driving system is used to carry a detection and repair device composed of a sonar system and a grouting system; The driving system is arranged in a ring shape on the cross section of the two ends of the tunnel pipe section, i.e. circumferentially, and a driving car is arranged on the driving track at the two ends, and a transmission rod is used to connect the two driving cars to form a horizontal track in the axial direction; (2) installing the detection and repair device on the transmission rod of the driving system to realize the integration of the sonar system, the driving system and the grouting system, and to realize the free switching use of the sonar system and the grouting system on the driving system; (3) the working process of the sonar system comprises two parts: A spiral full-scan mode is adopted, specifically, the sonar system steps along the tunnel axial track at a certain speed, and rotates along the tunnel circumferential track at a certain angular speed to form a full-scan of the outer wall of the tunnel to detect the damage and cracks; When the sonar system finds that there is a disease in the detection area, a continuous sampling local enhanced scanning mode is adopted, specifically, the sonar system continuously samples at a fixed interval in the axial direction and in a circle in the circumferential direction to locally enhance the scanning of the disease area, accurately locate the disease point and form a clear three-dimensional image; The sonar system comprises a probe shell, a sonar probe arranged in the probe shell and electronic elements for processing data; a single-beam mechanical scanning sonar is adopted to scan and image all directions around the sonar transducer, when the sound wave meets an object or the sea bottom, a reflected echo is generated, the echo signal is received by the sonar, and an image is formed according to the signal delay and intensity; then the sonar probe rotates at a certain angle, and the process of emitting and receiving is repeated again; After the disease point is determined, the computer system is fed back immediately, the disease point is judged according to the image, and repair processing is performed; (4) the sonar system is switched to the grouting system to perform grouting repair on the disease area, and the whole detection and repair work is completed after the slurry reaches the required strength; The operation steps of the grouting system comprise: after the cracks are located according to the sonar detection imaging, the slurry is added to a grouting liquid storage tank, the sonar probe is switched to a grouting port immediately, the cracks are grouted at high pressure through a pressurizing device, and the rate, pressure and amount of grouting are controlled according to the actual crack range and size.

2. The method according to claim 1, wherein the method is characterized in that, The realization of the spiral full-scan mode comprises: the driving system steps the detection and repair device in the axial direction at a certain speed along the transmission rod, and the stepping speed is not more than 0.10 m / min; at the same time, the driving system rotates the detection and repair device at a certain angular speed along the tunnel circumferential track, and the rotating angular speed is not more than 0.30 rad / min, thereby forming a spiral full-scan, which is beneficial to quickly and accurately finding out the damage and cracks of the outer wall of the tunnel.

3. The method according to claim 1, wherein the method further comprises the steps of: 1) detecting the damage and cracks on the outer wall of the underwater suspended tunnel by using the underwater robot; 2) repairing the damage and cracks on the outer wall of the underwater suspended tunnel by using the underwater robot. The axial fixed interval sampling distance of the continuous sampling local enhanced scanning mode is 0.5 m, and then the continuous sampling in a circle in the circumferential direction is adopted, which is beneficial to accurately locating the disease point and forming a clear three-dimensional image.

4. The method of claim 1, wherein the method further comprises: During the detection process, the sonar probe should stop and collect data at a fixed interval and at the disease area of the pipe wall according to the specification of the detected tunnel pipe section, and the stop time should be greater than one scanning period. ​ 5. The method according to claim 1, wherein the method further comprises the steps of: 1) detecting the damage and cracks on the outer wall of the underwater suspended tunnel by using the underwater robot; 2) repairing the damage and cracks on the outer wall of the underwater suspended tunnel by using the underwater robot. The grouting material of the grouting system is an expanding non-water reaction polymer material, which is injected from the grouting port to the disease position, and after grouting, the volume of the slurry body expands rapidly and generates a high-strength and high-toughness foamed polymer solid, thereby rapidly filling the fissure cavity, achieving the purpose of preventing seepage and plugging and stabilizing and reinforcing.

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