A reliability prediction method for slideways in immersed tunnel segment docking projects

Abstract

The present invention discloses a method for predicting the reliability of a slideway in an immersed tube tunnel pipe segment docking project, and constructs a prototype test system, which includes a bottom support foundation, a top reaction support structure, a vertical force loading mechanism, a horizontal top thrust loading mechanism, a slideway deformation measurement system, and a data processing system; slideways to be tested are fixedly installed on the top surface of the bottom support foundation and the bottom surface of the top reaction support structure, respectively, the vertical force loading mechanism is located between the bottom support foundation and the top reaction support structure, and the horizontal top thrust loading mechanism is located on one side of the horizontal top thrust loading mechanism; by controlling the operation of the jacks of the vertical force loading mechanism and the horizontal top thrust loading mechanism, the working condition of pushing the tunnel pipe segment along the slideway is simulated; during the process, the detection data of each oil pressure detection unit and the detection data of the roller displacement sensor are sent to the data processing system in real time, and the data processing system calculates the slideway friction coefficient and evaluates the slideway reliability.

Description

Technical Field

[0001] The present invention relates to the technical field of prediction of the feasibility of a construction scheme in an immersed tube tunnel butt joint project, and in particular to a reliability prediction method for a slideway in an immersed tube tunnel pipe segment butt joint project. Background Art

[0002] The tunnel segments in a certain immersed tunnel project were joined using an underwater push-out method. As a crucial component of the jointing scheme, the slideway design required a thorough assessment of its reliability. Furthermore, the overall stability of the tunnel segments during the push-out process is significantly affected by the friction coefficient of the slideway at the bottom. Therefore, to ensure proper jointing of the pushed-out segments, it was necessary to accurately predict the range of the slideway's friction coefficient under different operating conditions. Summary of the Invention

[0003] The purpose of the present invention is to provide a method for predicting the reliability of a slideway in an immersed tube tunnel pipe segment butt joint project in order to address the deficiencies of the prior art.

[0004] The technical solution adopted to achieve the purpose of the present invention is:

[0005] A reliability prediction method for a slideway in an immersed tube tunnel pipe segment connection project comprises the following steps:

[0006] Step 1: Collecting process parameters for the immersed tunnel segment connection project, including the material, size, and weight of the tunnel segments to be connected, and the material, size, and layout of the slideways;

[0007] Step 2: Build a prototype test system, which includes a bottom support foundation, a top reaction support structure, a slideway to be tested, a vertical force loading mechanism, a horizontal thrust loading mechanism, a slideway deformation measurement system, and a data processing system;

[0008] The top reaction support structure is fixedly mounted above the bottom support foundation through a vertical support frame, and a certain installation space is formed between the top reaction support structure and the bottom support foundation;

[0009] The slideways to be tested are fixedly installed on the top surface of the bottom support foundation and the bottom surface of the top reaction support structure. The material, size and layout of the slideways to be tested are the same as those of the prototype slideways at the actual construction site.

[0010] The vertical force loading mechanism is located between the bottom support foundation and the top reaction force support structure. The vertical force loading mechanism includes a vertical jack, an upper mounting plate, a lower mounting plate, and an upper friction test beam and a lower friction test beam. The number of the vertical jacks is n, which are installed between the upper mounting plate and the lower mounting plate. Each vertical jack is connected to a hydraulic pump station, and each hydraulic pump station is equipped with an oil pressure detection unit. The upper friction test beam is installed on the top of the upper mounting plate, and the lower friction test beam is installed on the bottom of the lower mounting plate. The material of the upper friction test beam and the lower friction test beam is the same as the material of the outer metal layer of the tunnel pipe segment.

[0011] The horizontal jack thrust loading mechanism is located on one side of the horizontal jack thrust loading mechanism, and the horizontal jack thrust loading mechanism includes a front box beam, a horizontal jack, a jack support seat, and a rear reaction force support seat. The horizontal jack is installed on the jack support seat. The front end of the action rod of the horizontal jack is connected to the front box beam, and the tail end of the horizontal jack is connected to the rear reaction force support seat. The number of the horizontal jacks is m, and each horizontal jack is connected to a hydraulic pump station, and each hydraulic pump station is equipped with an oil pressure detection unit.

[0012] The slide deformation measurement system includes multiple roller displacement sensors installed on the bottom support foundation, with the top of the roller displacement sensor resting on the lower surface of the lower friction test beam of the vertical force loading mechanism; the roller displacement sensor is connected to the data processing system and sends the detection data to the data processing system in real time;

[0013] Step 3: Adjust the pressure of the vertical jack to simulate the pressure F of the tunnel pipe section on the slideway at the construction site. N1 The pressure and flow of the horizontal jack are adjusted to push out the vertical force loading mechanism as a whole, with a pushing speed of v1 and a thrust of F1, simulating the process of pushing out a tunnel pipe segment at a construction site. During this process, the detection data of each oil pressure detection unit and the detection data of the roller displacement sensor are sent to the data processing system in real time, which calculates the slideway friction coefficient and evaluates the slideway reliability.

[0014] 1. Evaluation of slide reliability

[0015] The data processing system evaluates the reliability of the entire slideway to be tested based on the displacement data detected by the roller displacement sensor, and predicts whether the tunnel section can slide forward from the current rectangular slideway to the next rectangular slideway.

[0016] 2. Calculation of slide friction coefficient

[0017] The data processing system calculates the friction coefficient μ1 based on the detection data of the oil pressure detection units corresponding to the vertical jack and the horizontal jack and the known piston rod areas of the vertical jack and the horizontal jack;

[0018]

[0019] f1 is the friction force on the top surface of the bottom support base during the movement of the slide to be tested, which is equal to half of the total thrust of all the horizontal jacks mentioned above; F N1 is the normal pressure on the slide to be tested on the top surface of the bottom support foundation, which is equal to the sum of the thrusts of the vertical jacks;

[0020] Step 4: Replace the different slideways to be tested as needed, and then repeat step 3. By adjusting the pressure of the vertical jack and the pressure and flow of the horizontal jack, the data processing system can predict the pressure F of different slideways to be tested under different weights of tunnel pipe sections. Ni , different thrust F i and different rollout speeds v i Reliability under conditions and slide friction coefficient μ i .

[0021] In the above technical solution, the bottom support foundation is welded from steel beams to form a stable long rectangular structure with sufficient strength; the top reaction support structure is a rectangular box structure, and a pull rod is set between the top reaction support structure and the bottom support foundation.

[0022] In the above technical solution, a single slideway to be tested includes a plurality of rectangular slides arranged along a straight line.

[0023] In the above technical solution, the top of the roller displacement sensor is provided with a roller, so that the top of the sensor is in rolling contact with the lower surface of the lower friction test beam.

[0024] In the above technical solution, when the lower friction test beam of the vertical force loading mechanism presses down the slide to be tested on the bottom support foundation, the displacement of the lower friction test beam is detected by the roller displacement sensor, and the displacement is equal to the compression deformation of the pressed slide to be tested; the roller displacement sensor is connected to the data processing system and sends the detection data to the data processing system in real time.

[0025] In the above technical solution, by controlling the extension of the vertical jack, the upper friction test beam applies pressure to the slide to be tested on the bottom surface of the top reaction support structure, and at the same time, the lower friction test beam applies pressure to the slide to be tested on the top surface of the bottom support foundation, thereby simulating the working condition where the tunnel pipe segment generates pressure on the slide.

[0026] In the above technical solution, a safety threshold is preset in the data processing system, and the detected displacement is compared with the set safety threshold. When the detected displacement is greater than the set safety threshold, it is predicted that the tunnel pipe segment cannot slide forward on the rectangular slide of the current slideway to the next rectangular slide.

[0027] In the above technical solution, the piston rod areas of the n vertical jacks are defined as B1, B2, B3, ... B n , and the detection values ​​of the oil pressure detection units of the n hydraulic pump stations corresponding to the n vertical jacks are Q1, Q2, Q3...Q n ; Then the positive pressure on the slide to be tested on the top surface of the bottom support foundation is:

[0028] In the above technical solution, the piston rod areas of the m horizontal jacks are defined as A1, A2, A3, ...A m , and the detection values ​​of the oil pressure detection units of the m hydraulic pump stations corresponding to the m horizontal jacks are P1, P2, P3....P m ; The friction force on the slide to be tested on the top surface of the bottom support foundation is:

[0029] The beneficial effects of the present invention are:

[0030] The prediction method of the present invention establishes a bottom support foundation, a top reaction support structure, a slide to be tested, a vertical force loading mechanism, a horizontal top thrust loading mechanism, a slide deformation measurement system and a data processing system for the prototype test. The layout of the slide to be tested is consistent with the construction site, and it can simulate the slide force and the movement process of the push-out section of various construction schemes. It can truly and accurately predict the reliability and slide friction coefficient of different slides to be tested under conditions of tunnel pipe pressures of different weights, different thrusts and different push-out speeds, thereby providing reliable test data and technical support for project construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 The present invention is a flow chart of a method for predicting the reliability of a slideway in an immersed tube tunnel pipe segment docking project.

[0032] Figure 2 It is a schematic diagram of the three-dimensional structure of the prototype test system in the present invention.

[0033] Figure 3 This is a schematic diagram of the structure of the prototype test system of the present invention after removing the vertical force loading mechanism.

[0034] Figure 4 It is a structural schematic diagram of the vertical force loading mechanism of the prototype test system in the present invention.

[0035] Figure 5 It is a structural schematic diagram of the horizontal thrust loading mechanism of the prototype test system in the present invention.

[0036] For ordinary technicians in this field, other relevant drawings can be obtained based on the above drawings without any creative work. DETAILED DESCRIPTION

[0037] The present invention will be further described in detail below with reference to specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0038] A reliability prediction method for slideways in immersed tube tunnel segment docking projects, such as Figure 1 As shown, the following steps are included:

[0039] Step 1: Collect process parameters for the immersed tube tunnel segment connection project, including the material, size, and weight of the tunnel segments to be connected, as well as the material, size, and layout of the slideway.

[0040] Step 2: Build a prototype test system, see the attached Figure 2-5 The prototype test system includes a bottom support foundation 1, a top reaction support structure 2, a slide to be tested 5, a vertical force loading mechanism 3, a horizontal thrust loading mechanism 4, a slide deformation measurement system 6 and a data processing system.

[0041] The top reaction support structure is fixedly mounted above the bottom support foundation through a vertical support frame / column, and a certain installation space is formed between the top reaction support structure and the bottom support foundation; specifically, the bottom support foundation is welded from steel beams to form a stable long rectangular structure with sufficient strength; the top reaction support structure is a rectangular box structure. In order to ensure the strength of the top reaction support structure, a pull rod 7 is set between the top reaction support structure and the bottom support foundation to prevent the top reaction support structure from deformation.

[0042] A slideway to be tested is fixedly installed on the top surface of the bottom support foundation. The material, size and layout of the slideway to be tested are the same as those of the prototype slideway at the actual construction site.

[0043] A slideway to be tested is also fixedly installed on the bottom surface of the top reaction force support structure, and is arranged symmetrically with the slideway to be tested on the upper surface of the bottom support foundation.

[0044] It should be noted that, referring to the attached drawings, a single slide to be tested includes multiple rectangular slides 5.1 arranged in a straight line, and a large gap 5.2 is left between some adjacent rectangular slides. This is the same as the prototype slide structure at the actual construction site, because an inflatable water stop must be arranged at the gap on each prototype slide at the actual construction site.

[0045] The vertical force loading mechanism is located between the bottom support foundation and the top reaction support structure, and is used to simulate the pressure exerted by the tunnel pipe section on the slideway; specifically, the vertical force loading mechanism includes a vertical jack 3-1, an upper mounting plate 3-2, a lower mounting plate 3-3, an upper friction test beam 3-4, and a lower friction test beam 3-5. The number of the vertical jacks is n, and they are arranged in a row with equal intervals between the upper mounting plate and the lower mounting plate; the upper friction test beam is installed on the top of the upper mounting plate, and the lower friction test beam is installed on the bottom of the lower mounting plate; further, the material of the upper friction test beam and the lower friction test beam is the same as the material of the outer metal layer of the tunnel pipe section (the outside of the tunnel pipe section is coated with a metal layer); when working, by controlling the extension of the vertical jack, the upper friction test beam applies pressure to the slideway to be tested on the bottom surface of the top reaction support structure, and at the same time, the lower friction test beam applies pressure to the slideway to be tested on the top surface of the bottom support foundation, thereby simulating the working condition where the tunnel pipe section exerts pressure on the slideway. Furthermore, each vertical jack is connected to a hydraulic pump station, and each hydraulic pump station is equipped with an oil pressure detection unit. The piston rod areas of the n vertical jacks are defined as B1, B2, B3, ... B n , and the detection values ​​of the oil pressure detection units of the n hydraulic pump stations corresponding to the n vertical jacks are Q1, Q2, Q3...Q n .

[0046] The horizontal top thrust loading mechanism is located on one side of the horizontal top thrust loading mechanism, and is used to apply horizontal thrust to the horizontal top thrust loading mechanism, thereby simulating the working condition of pushing the tunnel pipe section along the slide. Specifically, the horizontal top thrust loading mechanism includes a front box beam 4-1, a horizontal jack 4-2, a jack support seat 4-3, and a rear reaction support 4-4. The horizontal jack is installed on the jack support seat. The front end of the action rod of the horizontal jack is connected to the front box beam, and the tail end of the horizontal jack is connected to the rear reaction support. Furthermore, the number of horizontal jacks is m, and each horizontal jack is connected to a hydraulic pump station, and each hydraulic pump station is equipped with an oil pressure detection unit. The piston rod areas of the m horizontal jacks are defined as A1, A2, A3...A m , and the detection values ​​of the oil pressure detection units of the m hydraulic pump stations corresponding to the m horizontal jacks are P1, P2, P3....P m .

[0047] The slide deformation measurement system includes a plurality of roller displacement sensors, which are installed on the bottom support foundation, and the top of the roller displacement sensor is against the lower surface of the lower friction test beam of the vertical force loading mechanism (the top of the roller displacement sensor has a roller, so that the top of the sensor is in rolling contact with the lower surface of the lower friction test beam). When the lower friction test beam of the vertical force loading mechanism presses down the slide to be tested on the bottom support foundation, the pressed slide to be tested may produce compression deformation. When the pressed slide to be tested produces compression deformation, the lower friction test beam on it will also displace downward accordingly, and then the displacement of the lower friction test beam can be detected by the roller displacement sensor, and the displacement is equal to the compression deformation of the pressed slide to be tested; the roller displacement sensor is connected to the data processing system and sends the detection data to the data processing system in real time.

[0048] Step 3: Adjust the pressure of the vertical jack to simulate the pressure F of the tunnel pipe section on the slideway at the construction site. N1 Adjust the pressure and flow of the horizontal jack to push out the vertical force loading mechanism as a whole, with a push-out speed of v1 and a thrust of F1, simulating the process of pushing out a tunnel pipe segment at a construction site. During this process, the detection data of each oil pressure detection unit and the detection data of the roller displacement sensor are sent in real time to the data processing system, which calculates the slideway friction coefficient and evaluates the slideway reliability. The specific method is as follows:

[0049] 1. Evaluation of slide reliability

[0050] The data processing system evaluates the reliability of the entire slideway to be tested based on the displacement data detected by the roller displacement sensor. That is, the detected displacement data is used to predict / evaluate whether the tunnel pipe section can slide forward onto the next rectangular slide on the rectangular slide of the slideway it is currently on. This is because if the detected displacement is too large, it means that the height difference between the rectangular slide currently pressed by the tunnel pipe section and the next rectangular slide that the tunnel pipe section needs to slide onto is too large. Once this height difference exceeds a safety threshold, the tunnel pipe section will not be able to slide smoothly onto the next rectangular slide under the action of the horizontal thrust, but will instead damage the next rectangular slide. Therefore, the present invention presets a safety threshold in the data processing system, compares the detected displacement with the set safety threshold, and when the detected displacement is greater than the set safety threshold, it is predicted that the tunnel pipe section cannot slide forward onto the next rectangular slide on the rectangular slide of the slideway it is currently on.

[0051] 2. Calculation of slide friction coefficient

[0052] The data processing system calculates the friction coefficient μ1 based on the detection data of the oil pressure detection units corresponding to the vertical jack and the horizontal jack and the known piston rod areas of the vertical jack and the horizontal jack;

[0053]

[0054] f1 is the friction force on the top surface of the bottom support base during the movement of the slide to be tested, which is equal to the thrust of all the horizontal jacks (f 11 、f 12 、f 13 …f 1m ) is half of the total (i.e., equal to half of the thrust F1); it should be noted that, during actual construction, there is only a slideway at the bottom of the tunnel pipe section, and the present invention adopts a vertical force loading mechanism based on a vertical jack to simulate the tunnel pipe section applying pressure to the slideway, so it is necessary to set up a top reaction force support structure to provide reaction force support; in order to be able to calculate the friction force of the slideway to be tested on the top surface of the bottom support foundation, the present invention also sets up a slideway on the bottom surface of the top reaction force support structure, so that the friction force of the slideway to be tested on the top surface of the bottom support foundation is considered to be equal to half of the total thrust of all horizontal jacks (it should be noted that in the present invention, the friction force of the slideway to be tested on the top surface of the bottom support foundation is calculated). It is considered to be equal to half of the total thrust of all horizontal jacks. This is because the force on the slide to be tested is mainly generated by the pressure provided by the vertical jack, and the pressure provided by the vertical jack is much greater than the weight of the entire vertical force loading mechanism itself. Therefore, the present invention ignores the influence of the weight of the vertical force loading mechanism itself on the slides to be tested on the upper and lower sides, and considers that the slides to be tested on the upper and lower sides are only affected by the pressure of the vertical jack, that is, it is considered that the positive pressures on the slides to be tested on the upper and lower sides are equal, and thus the friction forces they are subjected to are also equal. Therefore, the friction force of the slide to be tested on the top surface of the bottom support foundation is considered to be equal to half of the total thrust of all horizontal jacks);

[0055] F N1 is the positive pressure on the slide to be tested on the top surface of the bottom support foundation, which is equal to the thrust of the vertical jack (F N11 、F N12 、F N13 、F N1n ) total; that is:

[0056]

[0057]

[0058] in:

[0059] f 1i =P i ×A i

[0060] F N1i =Q i ×B i

[0061] After sorting out:

[0062]

[0063] Step 4: Replace the different slideways to be tested as needed, and then repeat step 3. By adjusting the vertical jack and the horizontal jack, the data processing system can predict the pressure F of different slideways to be tested under different weights of tunnel pipe sections. Ni , different thrust F i and different rollout speeds v i Reliability under conditions and slide friction coefficient μ i .

[0064] Furthermore, during the simulation test, water is applied to the surface of the slide to be tested to simulate an underwater construction environment. Alternatively, the prototype test system can be placed in a water environment to simulate an underwater construction environment.

[0065] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A method for predicting the reliability of a slideway in an immersed tunnel segment docking project, characterized in that: The following steps are involved: Step 1: Collecting process parameters for the immersed tunnel segment connection project, including the material, size, and weight of the tunnel segments to be connected, and the material, size, and layout of the slideways; Step 2: Build a prototype test system, which includes a bottom support foundation, a top reaction support structure, a slideway to be tested, a vertical force loading mechanism, a horizontal thrust loading mechanism, a slideway deformation measurement system, and a data processing system; The top reaction support structure is fixedly mounted above the bottom support foundation through a vertical support frame, and a certain installation space is formed between the top reaction support structure and the bottom support foundation; The slideways to be tested are fixedly installed on the top surface of the bottom support foundation and the bottom surface of the top reaction support structure. The material, size and layout of the slideways to be tested are the same as those of the prototype slideways at the actual construction site. The vertical force loading mechanism is located between the bottom support foundation and the top reaction force support structure. The vertical force loading mechanism includes a vertical jack, an upper mounting plate, a lower mounting plate, and an upper friction test beam and a lower friction test beam. The number of the vertical jacks is n, which are installed between the upper mounting plate and the lower mounting plate. Each vertical jack is connected to a hydraulic pump station, and each hydraulic pump station is equipped with an oil pressure detection unit. The upper friction test beam is installed on the top of the upper mounting plate, and the lower friction test beam is installed on the bottom of the lower mounting plate. The material of the upper friction test beam and the lower friction test beam is the same as the material of the outer metal layer of the tunnel pipe segment. The horizontal jack thrust loading mechanism is located on one side of the horizontal jack thrust loading mechanism, and the horizontal jack thrust loading mechanism includes a front box beam, a horizontal jack, a jack support seat, and a rear reaction force support seat. The horizontal jack is installed on the jack support seat. The front end of the action rod of the horizontal jack is connected to the front box beam, and the tail end of the horizontal jack is connected to the rear reaction force support seat. The number of the horizontal jacks is m, and each horizontal jack is connected to a hydraulic pump station, and each hydraulic pump station is equipped with an oil pressure detection unit. The slide deformation measurement system includes multiple roller displacement sensors installed on the bottom support foundation, with the top of the roller displacement sensor resting on the lower surface of the lower friction test beam of the vertical force loading mechanism; the roller displacement sensor is connected to the data processing system and sends the detection data to the data processing system in real time; Step 3: Adjust the pressure of the vertical jack to simulate the pressure F of the tunnel pipe section on the slideway at the construction site. N1 The pressure and flow of the horizontal jack are adjusted to push out the vertical force loading mechanism as a whole, with a pushing speed of v1 and a thrust of F1, simulating the process of pushing out a tunnel pipe segment at a construction site. During this process, the detection data of each oil pressure detection unit and the detection data of the roller displacement sensor are sent to the data processing system in real time, which calculates the slideway friction coefficient and evaluates the slideway reliability.

1. Evaluation of slide reliability The data processing system evaluates the reliability of the entire slideway to be tested based on the displacement data detected by the roller displacement sensor, and predicts whether the tunnel section can slide forward from the current rectangular slideway to the next rectangular slideway.

2. Calculation of slide friction coefficient The data processing system calculates the friction coefficient μ1 based on the detection data of the oil pressure detection units corresponding to the vertical jack and the horizontal jack and the known piston rod areas of the vertical jack and the horizontal jack; f1 is the friction force on the top surface of the bottom support base during the movement of the slide to be tested, which is equal to half of the total thrust of all the horizontal jacks mentioned above; F N1 is the normal pressure on the slide to be tested on the top surface of the bottom support foundation, which is equal to the sum of the thrusts of the vertical jacks; Step 4: Replace the different slideways to be tested as needed, and then repeat step 3. By adjusting the pressure of the vertical jack and the pressure and flow of the horizontal jack, the data processing system can predict the pressure F of different slideways to be tested under different weights of tunnel pipe sections. Ni , different thrust F i and different rollout speeds v i Reliability under conditions and slide friction coefficient μ i .

2. The reliability prediction method for slideways in immersed tube tunnel segment docking engineering according to claim 1 is characterized by: The bottom support foundation is welded from steel beams to form a stable long rectangular structure with sufficient strength; the top reaction support structure is a rectangular box structure, and a pull rod is set between the top reaction support structure and the bottom support foundation.

3. The reliability prediction method for slideways in immersed tunnel segment docking engineering according to claim 1 is characterized by: A single slideway to be tested includes multiple rectangular slides arranged along a straight line.

4. The reliability prediction method for slideways in immersed tube tunnel pipe segment docking engineering according to claim 1 is characterized by: The top of the roller displacement sensor is provided with a roller, so that the top of the sensor is in rolling contact with the lower surface of the lower friction test beam.

5. The reliability prediction method for slideways in immersed tube tunnel segment docking engineering according to claim 1 is characterized by: When the lower friction test beam of the vertical force loading mechanism presses down the slide to be tested on the bottom support foundation, the displacement of the lower friction test beam is detected by the roller displacement sensor, and the displacement is equal to the compression deformation of the pressed slide to be tested; the roller displacement sensor is connected to the data processing system and sends the detection data to the data processing system in real time.

6. The reliability prediction method for slideways in immersed tube tunnel segment docking engineering according to claim 1 is characterized by: By controlling the vertical jack pressure, the upper friction test beam applies pressure to the slideway to be tested on the bottom surface of the top reaction support structure, and at the same time, the lower friction test beam applies pressure to the slideway to be tested on the top surface of the bottom support foundation, thereby simulating the working condition where the tunnel pipe segment generates pressure on the slideway.

7. The reliability prediction method for slideways in immersed tunnel pipe segment docking engineering according to claim 1 is characterized by: A safety threshold is preset in the data processing system, and the detected displacement is compared with the set safety threshold. When the detected displacement is greater than the set safety threshold, it is predicted that the tunnel pipe segment cannot slide forward on the rectangular slide of the current slideway to the next rectangular slide.

8. The reliability prediction method for slideways in immersed tunnel pipe segment docking engineering according to claim 1 is characterized by: The piston rod areas of the n vertical jacks are defined as B1, B2, B3, ...B n , and the detection values ​​of the oil pressure detection units of the n hydraulic pump stations corresponding to the n vertical jacks are Q1, Q2, Q3...Q n ; Then the positive pressure on the slide to be tested on the top surface of the bottom support foundation is:

9. The reliability prediction method for slideways in immersed tube tunnel segment docking engineering according to claim 8 is characterized by: The piston rod areas of the m horizontal jacks are defined as A1, A2, A3, ...A m , and the detection values ​​of the oil pressure detection units of the m hydraulic pump stations corresponding to the m horizontal jacks are P1, P2, P3....P m ; The friction force on the slide to be tested on the top surface of the bottom support foundation is:

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