Installation method of sounding pipe

Abstract

The invention discloses a mounting method of a sounding pipe, relates to the technical field of sounding pipe mounting, and aims to solve the technical problems of poor sealing, weak environmental adaptation and low efficiency due to the adoption of a simple connection mode in the current sounding pipe mounting, and the mounting method comprises the following steps: S1, processing a sounding pipe interface, selecting a socket and spigot interface, and pre-mounting four sealing rubber rings in the interface; and S2, cleaning of the sounding pipe interface: after the sealing rubber ring is mounted, firstly, a specially-made high-pressure air spray gun is adopted to comprehensively purge the sounding pipe interface and the peripheral area at the pressure of not less than 0.4 MPa. The socket type connector is selected, the four sealing rubber rings are installed in advance, untight sealing is effectively prevented, the sealing rubber rings are made of special materials and are designed in size, the sealing rubber rings are tightly attached to the inner diameter of the sounding pipe and slightly larger than the inner diameter of the socket type connector, and the leakage risk is reduced through multi-directional sealing. According to the invention, the sealing performance can be ensured in a complex environment, the detection accuracy is ensured, and the service life of the sounding pipe is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of acoustic detection tube installation, and more specifically, to an installation method of an acoustic detection tube. Background Art

[0002] The acoustic detection tube plays an extremely important role in the field of construction engineering, especially in the construction of bored piles. It is the key channel for pile body integrity detection and provides the necessary transmission path for ultrasonic detection. By pre-installing the acoustic detection tube in the bored pile, the ultrasonic transmitting transducer and the receiving transducer can work smoothly in the tube. According to the changes in parameters such as time, amplitude, and frequency when the ultrasonic wave propagates between the tubes, the density of the pile body concrete, the presence or absence of defects, and the location and size of the defects can be accurately judged, thereby ensuring the accuracy of the pile body quality assessment. At the same time, the detection results of the acoustic detection tube can guide subsequent construction and maintenance. If quality defects are found in the bored pile, remedial measures can be taken in time, and basic data can be provided for basic maintenance and monitoring during the use of the building, thereby extending the service life of the building. In addition, during the construction process, its installation status can also reflect the quality of the bored pile construction, such as the standardization and sealing of the installation, which is of great significance to the overall project quality control.

[0003] However, the existing installation technology of acoustic detection pipes often adopts a simple connection method, and does not pay attention to the role of sealing rubber rings. The sealing rubber rings are made of ordinary materials, without special size design, poor high temperature resistance and corrosion resistance, and difficult to fit tightly to the acoustic detection pipe. Leakage is easy to cause blockage of the acoustic detection pipe, affecting detection, sealing failure in complex environments, short life, low construction efficiency and lack of effective detection methods. In view of this, we propose an installation method for acoustic detection pipes. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art, meet the actual needs, and provide a method for installing an acoustic detection tube to solve the technical problems that the current acoustic detection tube installation adopts a simple connection method, has poor sealing, weak environmental adaptability, and low efficiency.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: a method for installing an acoustic detection pipe, comprising the following steps:

[0006] S1: For the acoustic testing pipe interface, a socket-type interface is selected and 4 sealing rubber rings are pre-installed in the interface;

[0007] S2: Cleaning of the acoustic detection pipe interface. After installing the sealing rubber ring, first use a special high-pressure air spray gun to fully blow the acoustic detection pipe interface and the surrounding area at a pressure of not less than 0.4MPa;

[0008] Then, spray the metal surface cleaner evenly on the interface and within 5-8cm around it, and let it stand for 3-5 minutes;

[0009] Next, use a strictly disinfected and soft nanofiber cleaning cloth to wipe carefully from the inside to the outside and in a circular direction.

[0010] Finally, wipe again with sterile gauze soaked in pure distilled water to remove residual detergent;

[0011] S3: Heat shrink tube protection measures: After the acoustic detection tube interface is welded, immediately apply a heat shrink tube with a length of 15-20cm. Use a blowtorch to heat the heat shrink tube. The flame temperature of the blowtorch is 150-200℃. When heating, move evenly from the middle of the heat shrink tube to both ends.

[0012] S4: Installation and fixation of the sonic detection tube. After cleaning, configure 3 sonic detection tubes of equal length according to the effective length of the steel cage. The bottom of the sonic detection tube is sealed by welding with steel plates. The thickness of the sealing steel plate should not be less than the wall thickness of the sonic detection tube. The sonic detection tube and the main reinforcement are fixed with high-strength iron wire. There are no less than 3 fixing points for a single sonic detection tube and each section of the steel cage, and they are evenly distributed in the length direction of the sonic detection tube, and the iron wire is wrapped around the fixing points.

[0013] Preferably, the sealing rubber ring in step S1 is made of a rubber material that is resistant to high temperature and corrosion and has good elasticity, the inner diameter of the sealing rubber ring fits tightly with the inner diameter of the acoustic testing tube, and the outer diameter of the sealing rubber ring is slightly larger than the inner diameter of the socket-type joint.

[0014] Preferably, in step S1, a full welding process is adopted at the socket-type interface, and special welding equipment is used during welding to control the welding current, voltage and welding speed. The bottom of the weld of the socket-type interface extends to a position that is the same as the outer diameter of the sealing rubber ring, and the weld height is not less than the wall thickness of the acoustic detection tube. The interface where the weld contacts the acoustic detection tube has a smooth transition.

[0015] Preferably, in step 1, the port of the socket-type joint is subjected to arc blunt edge treatment to make the edge of the socket-type joint smooth.

[0016] Preferably, the heat shrinkable tube in step S3 is made of a polyolefin material that is resistant to high temperatures and has good shrinkage, and its inner diameter is slightly larger than the outer diameter of the acoustic detection tube.

[0017] Preferably, after step S3 is completed, a random inspection of the acoustic detection tubes is carried out, 5% of the acoustic detection tubes are randomly selected, the sealing rubber rings in the tubes are pulled out, the pulled out sealing rubber rings are put into clean water for cleaning, and checked for impurities, dirt, obvious deformation, and damage. If so, new sealing rubber rings are replaced and the acoustic detection tubes are repaired by welding.

[0018] Preferably, after step S4 is completed, a spot inspection of the acoustic detection pipe is carried out by injecting clean water into the pipe until the pipe is filled with water to check whether there is leakage in the acoustic detection pipe. If the water level drops, the leakage point is found in time and repaired and accepted.

[0019] Preferably, after the acoustic detection tube passes the inspection, a wooden wedge is used to temporarily block the top of the acoustic detection tube. The wooden wedge is made of hard, non-deformable wood, and its shape matches the inner diameter of the acoustic detection tube. The insertion depth is not less than 5 cm.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. The present invention uses a spigot-and-socket joint and pre-installs four sealing rubber rings to effectively prevent poor sealing. The special material and size design of the sealing rubber ring tightly fit the inner diameter of the acoustic detection tube and are slightly larger than the inner diameter of the spigot-and-socket joint. The multi-directional sealing reduces the risk of leakage. The present invention can also ensure sealing in complex environments, ensure accurate detection, and extend the life of the acoustic detection tube.

[0022] 2. The present invention uses a special clean water cleaning liquid and a nanofiber cleaning cloth to clean the interface. After the high-pressure air spray gun initially blows, the cleaning agent deeply removes dirt, the nanofiber cleaning cloth wipes carefully, and then sterile gauze is used to remove the residue. The present invention creates high-quality surface conditions for sealing and welding, reduces sealing failure and welding defects, and improves installation stability.

[0023] 3. The present invention immediately wraps the heat shrink tube after welding to prevent the acoustic detection tube from softening. The heat shrink tube with good high temperature resistance and good shrinkage is quickly wrapped after welding and evenly heated by a blowtorch to isolate the welding part from the outside world and reduce heat loss and environmental impact. The present invention can prevent the acoustic detection tube from softening and deforming, enhance structural strength and stability, and have both corrosion resistance and moisture resistance to ensure long-term performance.

[0024] 4. The present invention prevents displacement of the acoustic detection tube by adding a wooden board between the steel cage and the acoustic detection tube. The blocking and supporting function of the wooden board limits the displacement of the acoustic detection tube in various stages of construction. The present invention ensures the precise positioning and fixing effect of the acoustic detection tube, facilitates subsequent detection to obtain accurate data, and ensures engineering quality assessment and control. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 The present invention is a flow chart of the method. DETAILED DESCRIPTION

[0026] Embodiment 1, as Figure 1 As shown, the present invention relates to a method for installing an acoustic detection tube, comprising the following steps:

[0027] S1: For the acoustic detection pipe interface, a socket-type interface is selected, and 4 sealing rubber rings are pre-installed in the interface. This type of interface is relatively easy to operate and has high connection stability during installation. Its structural design allows the acoustic detection pipe to be well aligned during connection, providing favorable conditions for subsequent sealing and welding work.

[0028] In step S1, the sealing rubber ring is made of a rubber material that is resistant to high temperature and corrosion and has good elasticity. The inner diameter of the sealing rubber ring is tightly fitted with the inner diameter of the acoustic detection tube (the tolerance is controlled within ±0.1mm), and the outer diameter of the sealing rubber ring is slightly larger than the inner diameter of the socket-type joint to ensure that a good seal can be formed when the interface is connected; for example, fluororubber material can be selected, which can withstand temperatures as high as 250°C. During the concrete pouring process, even if it is affected by high temperature, it can maintain good sealing performance. Fluororubber has excellent tolerance to alkaline substances and other possible chemical substances in concrete, and effectively prevents the rubber ring from being damaged by chemical corrosion. Its good elasticity (Shore hardness is between 50-70) ensures that it can fit tightly when the interface is connected.

[0029] In step S1, the socket-type interface is subjected to full welding process, and an inverter DC arc welding machine is used as a special welding equipment during welding. During the welding process, the welding current is precisely controlled at 120A, the voltage is 22V, and the welding speed is 8cm / min. By setting these parameters reasonably, it is ensured that the weld can be fully fused to achieve sufficient strength and sealing. For example, excessive current may cause the weld to overheat, resulting in pores or burn-through; unstable voltage may affect the stability of the arc, and thus affect the quality of the weld; excessively fast welding speed may make the weld incomplete and prone to cracks.

[0030] The bottom of the weld of the socket-type joint extends to the same position as the outer diameter of the sealing rubber ring, and the height of the weld is not less than the wall thickness of the sonic detection tube (the height of the weld is 0.5mm greater than the wall thickness of the sonic detection tube). This ensures that the weld has sufficient strength when subjected to external pressure, and the interface where the weld contacts the sonic detection tube has a smooth transition (transition radius 5mm) to prevent stress concentration; in order to further ensure the quality of the weld, before welding, the welding part is strictly cleaned to remove impurities such as oil and rust to ensure the cleanliness of the welding surface. After welding is completed, the weld is inspected using a weld detection instrument (such as an ultrasonic flaw detector) to ensure that the weld is uniform, free of pores and cracks.

[0031] In step 1, the port of the socket-type interface is treated with an arc blunt edge with an arc radius of 4mm to make the edge of the socket-type interface smooth. This not only helps to better insert the acoustic detection tube during installation and avoid scratching the sealing rubber ring, but also reduces stress concentration at the interface and improves the overall strength and sealing of the interface. When performing the arc blunt edge treatment, professional grinding equipment is used to ensure that the arc shape of the port meets the design requirements and the surface roughness meets the specified standards;

[0032] S2: Cleaning of the acoustic detection pipe interface. After installing the sealing rubber ring, first use a special high-pressure air spray gun for cleaning. The spray gun can generate a pressure of 0.5MPa to fully blow the acoustic detection pipe interface and the surrounding area. The blowing time should be no less than 30 seconds to ensure that loose impurities such as dust and debris on the surface are removed. During the blowing process, the nozzle of the spray gun is designed to be adjustable at multiple angles, which can penetrate into every corner of the interface and effectively remove impurities hidden in the gaps. At the same time, the high-pressure air source is filtered to ensure that the sprayed air is pure and oil-free, avoiding secondary contamination of the interface surface;

[0033] Then, spray the metal surface cleaner evenly on the interface and within 6cm around it. The metal surface cleaner selected is a special cleaner containing phosphate ester, and its phosphate ester content is not less than 30%. This cleaner has a strong decontamination ability and can effectively decompose oil and other stubborn stains. Let it stand for 4 minutes to allow the cleaner to fully exert its decontamination effect and chemically react with the stains to make them easier to remove. During the detergent spraying process, use a spray nozzle to ensure that the detergent is evenly distributed in the cleaning area to avoid local accumulation or omissions;

[0034] Next, use a soft nanofiber cleaning cloth that has been strictly disinfected (using a combination of ultraviolet disinfection and alcohol wiping) to wipe. The fiber diameter of the nanofiber cleaning cloth is less than 100nm, and it has extremely strong adsorption capacity and cleaning effect. Wipe carefully from the inside to the outside and along the circumferential direction, and wipe at least 3 times. During the wiping process, constantly change the wiping surface of the cleaning cloth to ensure that a clean cloth surface is used for each wipe to avoid the wiped-off stains from contaminating the interface surface again. For stains that are difficult to wipe off, the wiping force can be appropriately increased, but care must be taken to avoid damaging the sealing rubber ring and the interface surface;

[0035] Finally, wipe again with sterile gauze soaked in pure distilled water to remove residual detergent. Distilled water undergoes multi-stage filtration and purification to ensure that it contains no impurities and ions and will not cause corrosion or contamination to the interface surface. After wiping, the residual moisture on the surface is blown dry with dry compressed air at a compressed air pressure of 0.5MPa. The compressed air source is also strictly filtered and dried to ensure that the blown air is dry, oil-free, and water-free, to prevent water stains or impurities from being left on the interface surface during the drying process;

[0036] S3: Heat shrink tubing protection measures;

[0037] Characteristics and selection of heat shrink tubing: After the ultrasonic detection tube interface is welded, immediately apply a heat shrink tubing with a length of 18 cm. The heat shrink tubing is made of polyolefin material that is resistant to high temperatures (can withstand high temperatures of 180°C-220°C) and has good shrinkage (shrinkage rate is between 50%-70%). Its inner diameter is slightly larger than the outer diameter of the ultrasonic detection tube (1mm larger). This material property enables the heat shrink tubing to shrink rapidly when heated, tightly wrapping around the interface of the ultrasonic detection tube, forming an effective sealing and protective layer to prevent concrete or other debris from entering the interface.

[0038] Control the heating process, use a blowtorch to heat the heat shrink tubing, and the flame temperature of the blowtorch is 180℃. When heating, move evenly from the middle of the heat shrink tubing to both ends (moving speed is 5cm / s) to ensure that the heat shrink tubing is heated evenly and shrinks uniformly. During the heating process, the operator closely observes the shrinkage of the heat shrink tubing, and adjusts the position and moving speed of the blowtorch in time to avoid local overheating or uneven shrinkage. At the same time, reserve a certain length (about 3cm) at both ends of the heat shrink tubing. After heating, trim the excess part to make the heat shrink tubing and the acoustic detection tube interface fit more closely.

[0039] Sampling inspection of acoustic detection tubes. Sampling inspection of acoustic detection tubes after the heat shrink tube protection measures are completed. Randomly select 5% of the acoustic detection tubes. Pull out the sealing rubber ring in the tube and put the extracted sealing rubber ring into clean water for cleaning. During the cleaning process, gently stir the clean water to fully remove the impurities on the surface of the sealing rubber ring. Then carefully check whether the sealing rubber ring has impurities (impurity area exceeding 5% of the surface area of ​​the sealing rubber ring is considered unqualified), dirt (oil stains, concrete residues, etc. that affect the sealing performance), obvious deformation (deformation exceeds 10% of the original size), and damage (cracks, holes, etc.). If the sealing rubber ring is found to have the above problems, replace it with a new sealing rubber ring and repair the acoustic detection tube. The repair welding uses the same process parameters as the original welding, that is, use an inverter DC arc welding machine, control the welding current at 120A, the voltage at 22V, and the welding speed at 8cm / min to ensure that the quality of the repair welding is consistent with the original weld.

[0040] S4: Installation and fixing of acoustic detection pipe;

[0041] The basis for the configuration of the acoustic detection tube is that after cleaning, three acoustic detection tubes of equal length are configured according to the effective length of the steel cage. When configuring the acoustic detection tube, the length of the steel cage is accurately measured, and a certain margin is reserved to ensure that the length of the acoustic detection tube is compatible with the steel cage, taking into account the possible deformation of the steel cage during installation. The acoustic detection tube is made of high-strength (yield strength not less than 300MPa) and corrosion-resistant (corrosion resistance meets relevant national standards) metal materials (such as Q345 steel), with uniform wall thickness (wall thickness tolerance is controlled within ±0.05mm), and the inner and outer diameters meet the engineering design requirements.

[0042] Bottom sealing process: the bottom of the acoustic detection tube is sealed by steel plate welding. The thickness of the sealing steel plate should not be less than the wall thickness of the acoustic detection tube (the thickness is the same or 1mm larger) to ensure that the welding is firm. Double-sided welding technology is used during welding. First, welding is performed on one side of the bottom steel plate. The weld height is not less than 0.8 times the thickness of the steel plate. Then the acoustic detection tube is turned over and welding is performed on the other side to ensure that the weld is full and free of defects such as pores and cracks. Before welding, the bottom of the steel plate and the acoustic detection tube are polished to remove the oxide layer and oil stains to improve the welding quality. After welding is completed, the weld is visually inspected. If there are uneven or raised parts, they are polished and trimmed to make a smooth transition with the surface of the acoustic detection tube.

[0043] The sonic detection tube is fixed to the main reinforcement. The sonic detection tube and the main reinforcement are fixed by binding with high-strength iron wire. There are no less than 3 fixing points between a single sonic detection tube and each section of the steel cage, and they are evenly distributed in the length direction of the sonic detection tube (the distance between adjacent fixing points is not more than 2m). The iron wire is wrapped around the fixing point for no less than 5 turns to ensure that the sonic detection tube will not be displaced on the steel cage. During the binding process, first pass the iron wire through the sonic detection tube and the main reinforcement, then cross-wrap it and tighten the iron wire so that the sonic detection tube fits tightly with the main reinforcement. In order to prevent the iron wire from loosening during the concrete pouring process, the end of the iron wire can be bent and pressed under the wrapped part after tightening. At the same time, some auxiliary fixing measures can be appropriately added at the fixing point, such as using plastic clips or metal clips to further enhance the fixing effect.

[0044] Inspection methods and standards: After the installation and fixation of the acoustic detection pipe, conduct an inspection of the acoustic detection pipe. Inject clean water into the pipe until it is full of water, and observe for 15 minutes. This is to check whether there is leakage in the acoustic detection pipe. If the water level drops (the drop height exceeds 5mm), find the leakage point in time and repair and accept it. During the water injection process, inject slowly to avoid bubbles that affect observation. Use a water level gauge or marking line to record the initial water level. During the observation period, keep the surrounding environment quiet to avoid vibration affecting the water level.

[0045] For the top plugging operation, after the acoustic detection tube passes the inspection, use a wooden wedge to temporarily plug the top of the acoustic detection tube. The wooden wedge is made of hard wood (such as oak) that is not easy to deform. Its shape matches the inner diameter of the acoustic detection tube (the tolerance is controlled within ±0.2mm), and the insertion depth is 6cm, so as to ensure the top seal and prevent debris from entering. Before inserting the wooden wedge, apply a layer of lubricating oil or vaseline on the surface of the wooden wedge to facilitate insertion and enhance the sealing effect. When inserting the wooden wedge, use a special wooden wedge insertion tool to gently tap the wooden wedge so that it is slowly and evenly inserted into the top of the acoustic detection tube until it reaches the specified insertion depth. After the insertion is completed, check whether there is a gap around the wooden wedge. If there is a gap, use sealant or putty to fill and seal it.

[0046] Example 2, as shown in Table 1, the method of the present invention was applied in Section 9 of the civil construction of the Tianjin Rail Transit Line Z2 Phase I Project (Binhai Airport Station-Beitang Station) PPP project.

[0047] The construction status of cast-in-place piles in the Dong-Bei section and Dongting Road Station of this bidding section is as follows:

[0048] There are 274 pile foundations in the Dong-Bei section, with pile diameters of 1m, 1.2m, and 1.5m, and section pile lengths ranging from 50m to 66m;

[0049] Dongting Road Station has 194 pile foundations, with a pile diameter of 1m and pile lengths ranging from 48.1m to 55.1m.

[0050] The integrity of the bored pile is tested by ultrasonic method. Three ultrasonic testing tubes with a diameter of 5cm and a wall thickness of 3mm are set for each bored pile. The length of a single ultrasonic testing tube is 12m.

[0051] The number of interfaces of the acoustic detection pipe is calculated according to the different number of sections of the steel cage. For example, the 200 cast-in-place piles with 6-section steel cages in the Dong~North section have 3,000 interfaces, totaling 7,176 interfaces.

[0052] Table 1 Data table of Dongbei section and Dongting Road station

[0053]

[0054]

[0055] The embodiments of the present invention disclose preferred embodiments, but are not limited thereto. A person skilled in the art can easily understand the spirit of the present invention based on the above embodiments and make different extensions and changes. However, as long as they do not deviate from the spirit of the present invention, they are all within the protection scope of the present invention.

Claims

1. A method for installing an acoustic detection tube, characterized in that: The steps include: S1: For the acoustic testing pipe interface, a socket-type interface is selected and 4 sealing rubber rings are pre-installed in the interface; S2: Cleaning of the acoustic detection pipe interface. After installing the sealing rubber ring, first use a special high-pressure air spray gun to fully blow the acoustic detection pipe interface and the surrounding area at a pressure of not less than 0.4MPa; Then, spray the metal surface cleaner evenly on the interface and within 5-8cm around it, and let it stand for 3-5 minutes; Next, use a strictly disinfected and soft nanofiber cleaning cloth to wipe carefully from the inside to the outside and in a circular direction. Finally, wipe again with sterile gauze soaked in pure distilled water to remove residual detergent; S3: Heat shrink tube protection measures: After the acoustic detection tube interface is welded, immediately apply a heat shrink tube with a length of 15-20cm. Use a blowtorch to heat the heat shrink tube. The flame temperature of the blowtorch is 150-200℃. When heating, move evenly from the middle of the heat shrink tube to both ends. S4: Installation and fixation of the sonic detection tube. After cleaning, configure 3 sonic detection tubes of equal length according to the effective length of the steel cage. The bottom of the sonic detection tube is sealed by welding with steel plates. The thickness of the sealing steel plate should not be less than the wall thickness of the sonic detection tube. The sonic detection tube and the main reinforcement are fixed with high-strength iron wire. There are no less than 3 fixing points for a single sonic detection tube and each section of the steel cage, and they are evenly distributed in the length direction of the sonic detection tube, and the iron wire is wrapped around the fixing points.

2. The method for installing an acoustic detection tube according to claim 1, characterized in that: In step S1, the sealing rubber ring is made of a rubber material that is resistant to high temperature and corrosion and has good elasticity. The inner diameter of the sealing rubber ring fits tightly with the inner diameter of the acoustic testing tube, and the outer diameter of the sealing rubber ring is slightly larger than the inner diameter of the socket-type joint.

3. The method for installing an acoustic detection tube according to claim 2, characterized in that: In step S1, a full welding process is adopted at the socket-type interface, and special welding equipment is used during welding to control the welding current, voltage and welding speed. The bottom of the weld of the socket-type interface extends to a position that is the same as the outer diameter of the sealing rubber ring, and the weld height is not less than the wall thickness of the acoustic testing tube. The interface where the weld contacts the acoustic testing tube has a smooth transition.

4. The method for installing an acoustic detection tube according to claim 3, characterized in that: In the step 1, the end of the socket-type joint is subjected to arc blunt edge treatment to make the edge of the socket-type joint smooth.

5. The method for installing an acoustic detection tube according to claim 4, characterized in that: In step S3, the heat shrinkable tube is made of a polyolefin material that is resistant to high temperatures and has good shrinkage, and its inner diameter is slightly larger than the outer diameter of the acoustic detection tube.

6. The method for installing an acoustic detection tube according to claim 5, characterized in that: After step S3 is completed, a random inspection of the acoustic detection tubes is carried out, 5% of the acoustic detection tubes are randomly selected, the sealing rubber rings in the tubes are pulled out, the pulled out sealing rubber rings are put into clean water for cleaning, and checked for impurities, dirt, obvious deformation, and damage. If there are any, new sealing rubber rings are replaced, and the acoustic detection tubes are repaired by welding.

7. The method for installing an acoustic detection tube according to claim 6, characterized in that: After step S4 is completed, a spot check of the acoustic detection pipe is carried out by injecting clean water into the pipe until the pipe is full of water to check whether there is leakage in the acoustic detection pipe. If the water level drops, the leakage point is found in time and repaired and accepted.

8. The method for installing an acoustic detection tube according to claim 7, characterized in that: After the acoustic detection tube passes the inspection, a wooden wedge is used to temporarily block the top of the acoustic detection tube. The wooden wedge is made of hard, non-deformable wood, and its shape matches the inner diameter of the acoustic detection tube. The insertion depth is not less than 5 cm.

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