Simulation device for measuring tunnel segment convergence

Abstract

The utility model discloses a simulation device used for measuring tunnel segment convergence, the device is used for simulating a pipe jacking method to build a connection channel, the device comprises a main tunnel, a pipe jacking machine, a model box, a supporting seat and a sensor, the pipe jacking machine is arranged in the main tunnel, the model box is arranged on the periphery of the main tunnel, and the supporting seat is arranged on the main tunnel. The pipe jacking machine is used for penetrating through a through hole in the side face of a main tunnel to jack a contact channel pipe piece into the model box to form a contact channel, the supporting base is fixed outside the main tunnel, the sensor is connected with the supporting plate through an installation piece, and the sensing end of the sensor is connected with the inner wall of the main tunnel. According to the utility model, a foundation is provided for carrying out pipe jacking method connection channel construction, convenience is provided for carrying out subsequent specific analysis, the construction time and economic cost are saved, and the engineering quality safety is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a pipe jacking method constructs tunnel technical field especially relates to a kind of simulation device for measuring tunnel segment convergence. BACKGROUND

[0002] Adopt pipe jacking method to build contact passage is a kind of method newly emerging in recent years, with safety, small pollution, short construction period and other advantages.Pipe jacking method contact passage as a kind of newly emerging technology, many scholars are involved in the research, and the current research on pipe jacking method contact passage is more on the construction equipment and method of contact passage in field, such as patent No.

[0003] But when carrying out pipe jacking method contact passage in field, limit jacking force, pre-supporting force and jacking force coordination relationship and the influence of different section forms on main tunnel structure need to be determined by on-site multiple attempts, leading to long construction time and poor effect. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a kind of simulation device for measuring tunnel segment convergence, solve the problem that limit jacking force, pre-supporting force and jacking force coordination relationship and the influence of different section forms on main tunnel structure need to be determined by on-site multiple attempts in prior art.

[0005] The utility model is realized as follows, a kind of simulation device for measuring tunnel segment convergence, for simulating pipe jacking method constructs contact passage, including main tunnel, pipe jacking machine, model box, support seat and sensor, the pipe jacking machine is placed in main tunnel, the model box is located in the outer periphery of main tunnel, the pipe jacking machine is used to pass through the through-hole of the side surface of main tunnel and form contact passage by toping into model box with contact passage segment, the support seat is fixed to the outside of main tunnel, the sensor is connected with support plate by mounting piece and the inductive end is connected with the inner wall of main tunnel.

[0006] When a tunnel is built, a main tunnel is usually built first, and then a connecting channel is built between the main tunnel, and when the connecting channel is built by using a pipe jacking method, a pipe jacking machine is usually placed in the main tunnel, the upper and lower sides and the two sides of the pipe jacking machine are in contact with the inner wall of the main tunnel, and then the pipe piece of the connecting channel is sequentially jacked into the through hole at the side of the main tunnel through the driving of the pipe jacking machine, so that the connecting channel is formed, and in this process, the influence of the driving force on the structure of the main tunnel is considered to avoid irreversible damage to the main tunnel; in view of the problem that the prior art needs to be tried on site many times to determine the limit jacking force, the pre-supporting force and the jacking force coordination relationship and the influence of different section forms on the structure of the main tunnel, the utility model adopts a simulation method to study the above technical problems, the pipe jacking machine is placed in the main tunnel, the support seat for installing the sensor is fixed outside the main tunnel by the mounting piece, the sensing end of the sensor is connected with the inner wall of the main tunnel, and the deformation of the main tunnel during the construction of the connecting channel by using the pipe jacking method can be sensed by the sensor, so that the utility model provides a basis for carrying out the pipe jacking method connecting channel construction and facilitates subsequent specific analysis, helps to save construction time and economic cost, and improves engineering quality and safety.

[0007] In the prior art, more researches are carried out on the pipe jacking method connecting channel field test and field monitoring, but as for the design that the support seat is fixed outside the main tunnel, this cannot be achieved on site because the main tunnel is relatively long on site, and it is difficult to guarantee the stability of the support seat, and if the support seat for installing the sensor is fixed in the main tunnel, the support seat itself will generate errors along with the deformation of the main tunnel, and in the simulation experiment of the utility model, the problem encountered on site can be well solved, and the convergence of the tunnel pipe piece can be accurately simulated.

[0008] The simulation device of the utility model relies on a scale model design of an actual project, designs the pipe jacking machine, the pipe piece of the main tunnel and the model box, provides a device and a method for measuring the convergence of the main tunnel pipe piece in the pipe jacking method connecting channel construction model test process, aims to carry out the pipe jacking method connecting channel test, can study the limit jacking force of the main tunnel structure, the pre-supporting force and the jacking force coordination relationship and the influence of different section forms on the structure of the main tunnel, and realizes the monitoring of the convergence deformation of the pipe piece.

[0009] The further technical scheme of the utility model is that the support seat is placed at the two ends outside the main tunnel, and the mounting piece is placed between the support seats and is used for connecting the sensor.

[0010] The further technical scheme of the utility model is that the sensor is a wire displacement sensor, and the sensor comprises a main body and a connector connected with the main body, the connector is connected with the inner wall of the main tunnel, and the main body is placed on the connector.

[0011] The further technical scheme of the utility model is that the sensors are symmetrically arranged on the inner wall of the main tunnel.

[0012] The further technical scheme of the utility model is: the jacking pipe machine includes pre-supporting plate and jacking pipe drive placed on the pre-supporting plate, and the jacking pipe drive is used for jacking the pipe piece of the connecting channel into the model box from the through hole of the main tunnel to form the connecting channel.

[0013] The further technical scheme of the utility model is: the pre-supporting plate is equipped with the hole for the induction end of the sensor to pass through.

[0014] The further technical scheme of the utility model is: the pre-supporting plate includes the arc-shaped upper pre-supporting plate, lower pre-supporting plate, first side pre-supporting plate and second pre-supporting plate, the upper pre-supporting plate is symmetrically arranged with the lower pre-supporting plate, the first side pre-supporting plate is symmetrically arranged with the second pre-supporting plate, the jacking pipe drive is placed on the first side pre-supporting plate, and the second pre-supporting plate is placed on the two sides of the through hole of the main tunnel.

[0015] The further technical scheme of the utility model is: the model box on the side of the main tunnel is equipped with the counterforce supporting piece.

[0016] The further technical scheme of the utility model is: the model box is equipped with the connecting lug on the two sides, and the model box bottom is equipped with the pulley.

[0017] The utility model also provides a kind of simulation method for measuring tunnel pipe piece convergence, and the method comprises the following steps:

[0018] Step one, according to the simulation device is assembled;

[0019] Step two, jacking pipe machine action jacks the connecting channel pipe piece into model box, sensor monitors the deformation data of main tunnel, and the deformation data is transmitted to processor to obtain tunnel pipe piece radial displacement convergence.

[0020] The utility model has the beneficial effects: the utility model uses simulation to study the above technical problem, jacking pipe machine is placed in main tunnel, the support seat of sensor is fixed on the outside of main tunnel by mounting piece, the induction end of sensor is connected with the inner wall of main tunnel, and the deformation of main tunnel when jacking pipe method is used to build connecting channel can be sensed by sensor, so that the utility model provides basis for developing jacking pipe method connecting channel construction, provides convenience for subsequent specific analysis, helps to save construction time and economic cost, and improves engineering quality and safety.

[0021] The prior art has more related researches on the field test and field monitoring of the pipe jacking method, but the design of fixing the support seat outside the main tunnel cannot be realized in the field because the main tunnel is long in the field, and it is difficult to guarantee the stability of the support seat, and if the support seat for installing the sensor is fixed in the main tunnel, the support seat itself will generate errors with the deformation of the main tunnel, and in the simulation experiment of the utility model, the problem encountered in the field can be well solved, and the convergence of the tunnel segment can be accurately simulated. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is a schematic view of the arrangement of the main tunnel and the connecting tunnel provided by the utility model;

[0023] Figure 2 is a structural schematic view of the model box cooperating with the main tunnel provided by the utility model;

[0024] Figure 3 is a structural schematic view of the counterforce supporting piece of the model box provided by the utility model;

[0025] Figure 4 is a structural schematic view of the main tunnel segment provided by the utility model;

[0026] Figure 5 is a schematic view of the pipe segment splicing and connecting of the main tunnel and the connecting tunnel T joint part provided by the utility model;

[0027] Figure 6 is a structural schematic view of the pipe jacking machine provided by the utility model;

[0028] Figure 7 is a structural schematic view of the rectangular sleeve inside the pipe jacking machine provided by the utility model;

[0029] Figure 8 is a structural schematic view of the circular sleeve inside the pipe jacking machine provided by the utility model;

[0030] Figure 9 is a layout view of the holes on the first side pre-supporting plate inside the main tunnel provided by the utility model;

[0031] Figure 10 is a layout view of the holes on the second side pre-supporting plate inside the main tunnel provided by the utility model;

[0032] Figure 11 is a sensor layout view inside the main tunnel provided by the utility model.

[0033] REFERENCE SIGNS: 1. main tunnel,

[0034] 2. Jacking machine, 21. Upper pre-supporting plate, 22. Lower pre-supporting plate, 23. First side pre-supporting plate, 24. Second side pre-supporting plate, 25. Jacking drive,

[0035] 3. Model box, 31. Connecting lug, 32. Pulley, 33. Counterforce support,

[0036] 4. Support base, 42. Mounting,

[0037] 5. Sensor, 51. Main body, 52. Joint,

[0038] 6. Communication passage,

[0039] 7. Upper supporting plate, 8. Lower supporting plate, 9. Sleeve, 101. Bolt, 112. Support, 13. Standard block, 15. Lining block, 14. Capping block, 18. Steel bar, 19. First connecting block, 20. Through hole, 21. Longitudinal bar, 22. Wall supporting plate, 23. Second connecting block, 26. Lower supporting member, 27. Inclined supporting plate,

[0040] X. Axis center direction of the first side pre-supporting plate, Y. Axis center direction of the second side pre-supporting plate. DETAILED DESCRIPTION

[0041] The embodiments of the present application will be described in detail with specific examples. Those skilled in the art can easily understand other advantages and effects of the present application from the content disclosed in the specification. The present application can also be implemented or applied in other different embodiments, and various modifications or changes can be made to the details in the specification without departing from the spirit of the present application.

[0042] It should be noted that the structures, proportions, sizes, etc. shown in the drawings attached to the specification are only used to understand and read the content disclosed in the specification by those skilled in the art, and do not define the limiting conditions for the implementation of the present application, so they do not have technical significance. Any modification of the structure, change of the proportion relationship or adjustment of the size, without affecting the effects and purposes that can be achieved by the present application, should still fall within the scope of the technical content disclosed by the present application. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in the specification are only for the convenience of clear description, and are not used to limit the scope of the implementation of the present application. The change or adjustment of the relative relationship, without substantially changing the technical content, is also considered as the scope of the implementation of the present application.

[0043] Example 1:

[0044] Figures 1-11The utility model discloses a simulation device for measuring tunnel segment convergence, which is used for simulating the construction of a contact channel by pipe jacking method, comprising a main tunnel 1, a pipe jacking machine 2, a model box 3, a support base 4 and a sensor 5. The pipe jacking machine 2 is arranged in the main tunnel 1. The model box 3 is arranged on the outer periphery of the main tunnel 1. The pipe jacking machine 2 is used for jacking the segments of the contact channel into the model box 3 through a through hole in the side of the main tunnel 1 to form a contact channel 6. The support base 4 is fixed to the outer periphery of the main tunnel 1. The sensor 5 is connected to the support base 4 through a mounting member 42 and the sensing end of the sensor 5 is connected to the inner wall of the main tunnel 1.

[0045] When a tunnel is constructed, a main tunnel is usually constructed first, and then a contact channel is constructed between the main tunnel. When the contact channel is constructed by the pipe jacking method, the pipe jacking machine is arranged in the main tunnel, the upper and lower sides of the pipe jacking machine are in contact with the inner wall of the main tunnel, and then the segments of the contact channel are jacked into the main tunnel from the through hole in the side of the main tunnel in sequence by the driving of the pipe jacking machine, so as to form the contact channel. In this process, the influence of the driving force on the structure of the main tunnel needs to be considered to avoid irreversible damage to the main tunnel. In view of the problem that the existing technology needs to be tried on site many times to determine the limit jacking force, the cooperative relationship between the pre-supporting force and the jacking force, and the influence of different section forms on the structure of the main tunnel, the utility model adopts a simulation method to study the above technical problems. The pipe jacking machine is arranged in the main tunnel, the support base for mounting the sensor is fixed to the outer periphery of the main tunnel, the sensing end of the sensor is connected to the inner wall of the main tunnel, and the deformation of the main tunnel during the construction of the contact channel by the pipe jacking method can be sensed by the sensor. Therefore, the utility model provides a basis for the construction of the contact channel by the pipe jacking method and facilitates the subsequent specific analysis, helps to save the construction time and economic cost, and improves the engineering quality and safety.

[0046] In the prior art, more researches are carried out on the field test and field monitoring of the contact channel by the pipe jacking method, but the design of fixing the support base to the outer periphery of the main tunnel cannot be achieved in the field because the main tunnel is long in the field and it is difficult to ensure the stability of the support base. If the support base for mounting the sensor is fixed to the inner periphery of the main tunnel, the support base itself will generate errors with the deformation of the main tunnel. However, the problem encountered in the field can be well solved in the simulation experiment of the utility model, and the convergence of the tunnel segments can be accurately simulated.

[0047] The simulation device of the utility model is designed based on the scale model of the actual project, the pipe jacking machine, the segments of the main tunnel and the model box are designed, and the device and method for measuring the convergence of the segments of the main tunnel in the model test process of the construction of the contact channel by the pipe jacking method are provided. The device and method are used for carrying out the test of the contact channel by the pipe jacking method, studying the limit jacking force of the main tunnel structure, the cooperative relationship between the pre-supporting force and the jacking force, and the influence of different section forms on the structure of the main tunnel, and realizing the monitoring of the convergence and deformation of the segments.

[0048] In the embodiment, the pipe jacking machine for the construction of the connecting passage in the field engineering is designed and simulated in a scale of 1:6.875, which can simulate the actual construction conditions and study the effects of different jacking forces, pre-support forces, different section sizes and forms on the main tunnel structure.

[0049] In the embodiment, the main tunnel mainly consists of main tunnel segments, and the segments for the main tunnel and the connecting passage mainly include reinforced concrete segments and reinforced concrete composite segments. The reinforced concrete segment is the most commonly used segment in the pipe jacking method. It is composed of steel and concrete and has good strength and durability. First, the mold of the segment is manufactured, and then the manufacturer is contacted for production. The reinforced concrete composite segment has good strength and stability and is suitable for areas with complex geological conditions.

[0050] In the embodiment, the support seats 4 are arranged at the two ends outside the main tunnel 1, the mounting members 42 are arranged between the support seats 4 for connecting the sensor 5 support seats at the two ends outside the main tunnel, the mounting members pass through the inside of the main tunnel and are connected with the support plates at the two ends, and then the sensor is mounted on the mounting member. The position of the sensor is fixed, and the stability is high.

[0051] In the embodiment, the sensor 5 is a pull-wire displacement sensor, which includes a main body 51 and a connector 52 connected with the main body 51. The connector 52 is connected with the inner wall of the main tunnel 1, and the main body 51 is arranged on the connecting member 42.

[0052] In the embodiment, after the main tunnel and the pipe jacking machine are in place, the support seats and the mounting members are installed. Since the measured displacement for measuring the segment convergence is an absolute value, it is necessary to ensure that the position of the support seat is fixed. Therefore, the support seat is independently arranged, and then passes through the center of the main tunnel and is fixed outside the main tunnel through the mounting member. The sensor can be mounted on the mounting seat to monitor the change in displacement.

[0053] In the embodiment, the mounting member is cylindrical, the pull-wire displacement sensor is mounted on the mounting member, the main body is at the center of the cylinder, the monitoring head of the sensor for sensing the displacement change area is connected with the main tunnel segment, the displacement change amount of the segment is measured in the radial direction, and the measured diameter change amount is the sum of the values on the opposite sides of the sensor, that is, the total displacement change amount of the segment in a certain direction can be obtained.

[0054] In the embodiment, the sensor 5 is symmetrically arranged on the inner wall of the main tunnel 1.

[0055] In the embodiment, the pipe jacking machine 2 includes a pre-support plate and a pipe jacking drive 25 arranged on the pre-support plate. The pipe jacking drive 25 is used to jack the connecting passage segment into the model box 3 through the through hole of the main tunnel 1 to form the connecting passage 6.

[0056] In the embodiment, the pre-supporting plate is provided with a hole for the sensor 5 sensing end to pass through.

[0057] In the embodiment, the pre-supporting plate comprises an arc-shaped upper pre-supporting plate 21, a lower pre-supporting plate 22, a first side pre-supporting plate 23 and a second pre-supporting plate 24, the upper pre-supporting plate 21 and the lower pre-supporting plate 22 are symmetrically arranged, the first side pre-supporting plate 23 and the second pre-supporting plate 24 are symmetrically arranged, the pipe jacking 25 is arranged on the first side pre-supporting plate 23, and the second pre-supporting plate 24 is arranged on both sides of the through hole of the main tunnel 1.

[0058] In the embodiment, the pre-supporting plate is respectively provided with four hydraulic oil cylinders, and the four groups of hydraulic oil cylinders are uniformly controlled for jacking, so that the jacking force is more uniform, and damage to the main tunnel segment caused by uneven force is prevented. The upper pre-supporting plate, the lower pre-supporting plate and the connecting rod for connecting the upper pre-supporting plate and the lower pre-supporting plate are the frame of the entire experimental device, and play a role of bearing support. The control part is mainly divided into three groups: the first side pre-supporting plate and the second side pre-supporting plate control part, the upper pre-supporting plate and the lower pre-supporting plate hydraulic oil cylinder control part, and the pipe jacking control part. The first side pre-supporting plate and the second side pre-supporting plate control part and the upper pre-supporting plate and the lower pre-supporting plate hydraulic oil cylinder control part are respectively controlled by using a "total-distributed" mode.

[0059] In the embodiment, the first side pre-supporting plate is provided with a hole at the center of the pipe joint of the main tunnel segment, so as to arrange a sensor through the first side pre-supporting plate. In the embodiment, the specific hole is: a hole with a diameter of 3 cm is arranged at a position of 10.5 cm in the axial center line direction of the first side pre-supporting plate, a hole with a diameter of 3 cm is arranged at a position of 31.5 cm, a hole with a diameter of 3 cm is arranged at a position of 52.5 cm, and a hole with a diameter of 3 cm is arranged at a position of 73.5 cm.

[0060] In the embodiment, the second side pre-supporting plate is provided with a hole at the center of the pipe joint of the main tunnel segment, and the second side pre-supporting plate comprises two, and a hole with a diameter of 3 cm is arranged at a position of 6 cm in the axial center line direction of the second pre-supporting plate for arranging a sensor.

[0061] As other embodiments, the holes on the first side pre-supporting plate and the second side pre-supporting plate are designed as follows: a hole with a length of 4 cm and a diameter of 3 cm is arranged at the center of the pipe joint, so as to arrange a sensor through the segment.

[0062] In the embodiment, the model box 3 on one side of the main tunnel 1 is provided with a counterforce supporting piece 33.

[0063] In the embodiment, the model box 3 is provided with connecting ears 31 on both sides, and the model box 3 is provided with pulleys 32 at the bottom.

[0064] In the embodiment, the model box has a length of 7m along the main tunnel extension direction, a length of 4m along the jacking connection channel direction, a height of 4m, and a steel material along the jacking direction of the pipe jacking.

[0065] Embodiment two:

[0066] A simulation method for measuring tunnel segment convergence, the method comprising the following steps:

[0067] Step one, assemble the simulation device according to embodiment one;

[0068] Step two, the pipe jacking machine 2 drives the connection channel segment into the model box 3, the sensor 5 monitors the deformation data of the main tunnel 1, and transmits the deformation data to the processor to obtain the radial displacement convergence of the tunnel segment.

[0069] Figure 1 It is a schematic diagram of the distribution relationship between the main tunnel and the connection channel simulated by the test device of the utility model, 1 is the main tunnel, 6 is the connection channel, and the T joint part of the main tunnel and the connection channel is specially designed.

[0070] Figure 2 It is a schematic diagram of the model box of the test device of the utility model. The model box is composed of wall support plates 22, the wall support plates 22 are used for closing the whole device space, the wall support plates 22 are connected by second connecting blocks 23, the second connecting blocks 23 are used for fixing the model box wall support plates, and the design of the connecting ears can be hooked by using a chain to move when the device needs to be moved, and the device can be moved by pushing the box body through a pulley under the action of the pulley when the device needs to be moved for a short distance.

[0071] Figure 3 It is a schematic diagram of the counterforce support of the model box of the utility model. Since the test device will apply a jacking force in the process of simulating the connection channel, a counterforce needs to be applied to counteract the force. In the utility model, a counterforce support for counteracting the jacking force from the horizontal direction is arranged on the model box. The counterforce support comprises a lower support 26 and an inclined support plate 27, the lower support 26 can be embedded in the soil, and the inclined support plate 27 can be fixed on the horizontal plane.

[0072] Figure 4 It is a schematic diagram of the main tunnel segment of the utility model, which is a ring segment of the main tunnel, the different ring segments are assembled by staggered joints, each ring segment is divided into six joint blocks, the number 13 is a standard block of the main tunnel segment, the number 14 is a top sealing block of the main tunnel segment, and the number 15 is a lining block of the main tunnel segment. One ring segment is connected by six blocks, which can ensure the stability and integrity of the structure and restore the actual working condition to the greatest extent.

[0073] Figure 5 The utility model test device simulation main tunnel and liaison channel T joint part schematic diagram. This place has 6 pieces of pipe piece in total, set up as composite pipe piece, namely pipe piece adopts steel structure, carry out reinforcement inside, adopt concrete to pour to constitute;Specifically including the steel bar 18 of composite pipe piece place belongs to, the first connecting block 19 between pipe piece, the through hole 20 on main tunnel. The pipe piece between different ring and the pipe piece between ring and ring are connected through the setting first connecting block. Meanwhile, the pipe piece inside is reinforced to guarantee the mechanical property of structure;The cross muscle and longitudinal muscle 21 are arranged between each pipe piece to enhance the strength of pipe piece. The pipe piece is connected through the first connecting block 19 between pipe piece.

[0074] As shown in Figure 6 , the first side pre-supporting plate and the second side pre-supporting plate are connected with the horizontal hydraulic cylinder through flanges, and the horizontal hydraulic cylinder provides horizontal pre-supporting force for the first side pre-supporting plate and the second side pre-supporting plate. The upper pre-supporting plate and the lower pre-supporting plate are provided with an intermediate upper supporting plate 7 and an intermediate lower supporting plate 8, and the flanges of the hydraulic cylinder for applying vertical pre-supporting force are connected with the upper supporting plate 7 and the lower supporting plate 8 to provide support for the whole device. In the utility model, four horizontal hydraulic cylinders form a group, and four vertical hydraulic cylinders form a group, which are controlled as a whole to facilitate the application of hydraulic cylinders with equal size and uniformity in the horizontal or vertical direction.

[0075] As shown in Figure 7 , 8 , it is a schematic diagram of a pipe jacking machine pushing part simulated by the test device of the utility model, and the lower pre-supporting plate is used to be attached to the pipe piece at the bottom of the main tunnel to provide pre-supporting force. The pipe jacking drive is a jack, the jack is connected with the lower supporting plate 8, the lower supporting plate 8 is attached to the first side pre-supporting plate to provide pushing force, the pipe jacking end of the jack is provided with a sleeve 9, the sleeve 9 is used for sleeving the pipe piece of the liaison channel, and a support 112 is arranged below the jack for supporting. When starting to work, the jack applies pushing force to be attached to the pipe piece of the main tunnel to provide pushing force and provide reaction force to the sleeve 9 part, and the pipe piece of the liaison channel is pushed forward under the action of the pushing force.

[0076] As shown in Figure 7 , 8 , it is a schematic diagram of a pipe jacking machine pushing part simulated by the test device of the utility model, the pipe jacking drive is connected with the first side pre-supporting plate through bolts 101, a support 112 is arranged below the pipe jacking drive, the output end of the pipe jacking drive can be used to connect a circular sleeve or a rectangular sleeve, and the liaison channel with different sections is selected to be pushed, and a certain position space is reserved in the sleeve for storing soil.

[0077] Figures 9-10It is the structure schematic view of the upper and lower pre-supporting plates and the first and second side pre-supporting plates in the main tunnel and the pipe jacking machine, other structures in the pipe jacking machine are omitted, the structure in the main tunnel is convenient to observe, and the opening of the pre-supporting plate on the pipe jacking machine is also more convenient to see when arranging the sensor.

[0078] Figure 11 It is the sensor layout diagram of the utility model test device, the joint is fixed on the segment of the main tunnel after being pulled out from the sensor to simulate the deformation of the segment in the actual construction, the pull-wire displacement sensor will also change, so that the horizontal displacement convergence of the segment of the main tunnel can be measured, and the pull-wire displacement sensor is also arranged on the opposite side to measure the convergence change of the other half, and the entire radial displacement convergence can be obtained by adding the two.

[0079] The above only describes the preferred embodiment of the utility model, and is not used to limit the utility model, and any modification, equivalent replacement and improvement within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A simulation device for measuring the convergence of a tunnel segment, for simulating the construction of a liaison tunnel by pipe jacking, characterized in that: The utility model relates to a main tunnel (1), a pipe jacking machine (2), a model box (3), a support seat (4) and a sensor (5), the pipe jacking machine (2) is placed in the main tunnel (1), the model box (3) is arranged on the periphery of the main tunnel (1), the pipe jacking machine (2) is used to top the communication passage pipe piece into the model box (3) and form the communication passage (6) through the through -hole of the side of the main tunnel (1), the support seat (4) is fixed outside the main tunnel (1), the sensor (5) is connected with the support seat (4) through the mounting (42) and the inductive end is connected with the inner wall of the main tunnel (1).

2. A simulation device for measuring the convergence of a tunnel segment according to claim 1, characterized in that: The support seat (4) is placed at both ends outside the main tunnel (1), and the mounting (42) is placed between the support seat (4) for connecting the sensor (5).

3. A simulation device for measuring the convergence of a tunnel segment according to claim 1, characterized in that, The sensor (5) is a pull wire displacement sensor, comprising a main body (51) and a connector (52) connected with the main body (51), the connector (52) is connected with the inner wall of the main tunnel (1), and the main body (51) is placed on the mounting (42).

4. The simulation device for measuring the convergence of the tunnel segment according to claim 1, wherein, The sensor (5) is symmetrically connected with the inner wall of the main tunnel (1).

5. The simulation device for measuring the convergence of the tunnel segment according to claim 1, wherein: The pipe jacking machine (2) comprises a pre-supporting plate and a pipe jacking drive (25) placed on the pre-supporting plate, and the pipe jacking drive (25) is used to top the communication passage pipe piece from the through -hole of the main tunnel (1) into the model box (3) and form the communication passage (6).

6. A simulation device for measuring the convergence of a tunnel segment according to claim 5, characterized in that: The pre-supporting plate is provided with a hole for the inductive end of the sensor (5) to pass through.

7. A simulation device for measuring the convergence of a tunnel segment according to claim 5, characterized in that: The pre-supporting plate comprises an arc-shaped upper pre-supporting plate (21), a lower pre-supporting plate (22), a first side pre-supporting plate (23) and a second pre-supporting plate (24), the upper pre-supporting plate (21) and the lower pre-supporting plate (22) are symmetrically arranged, the first side pre-supporting plate (23) and the second pre-supporting plate (24) are symmetrically arranged, the pipe jacking drive (25) is placed on the first side pre-supporting plate (23), and the second pre-supporting plate (24) is placed on both sides of the through -hole of the main tunnel (1).

8. The analog device for measuring the convergence of the tunnel segment according to claim 1, wherein: The model box (3) on one side of the main tunnel (1) is provided with a counterforce supporting piece (33).

9. The analog device for measuring the convergence of the tunnel segment according to claim 1, wherein: The model box (3) is provided with connecting ears (31) on both sides, and the model box (3) is provided with pulleys (32) on the bottom.

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