A pipe jacking automatic adjustment system and adjustment method

Abstract

The present invention discloses an automatic adjustment system and method for pipe jacking. The automatic adjustment system includes a pipe jacking machine and a detection mechanism. A machine base and a plurality of connected pipe sections are sequentially arranged at the rear side of the pipe jacking machine. The inner side of the machine base is connected to the edge of the pipe jacking machine through a deviation correction device. A jacking device is arranged between the middle part of the pipe jacking machine and the machine base. The lower part of the pipe jacking machine is connected to the first pipe section through a screw conveyor. The detection mechanism includes a soil pressure sensor arranged in the screw conveyor and a displacement angle sensor arranged at the outer edge position between the first pipe section and the second pipe section. The pipe jacking machine, the machine base and the detection mechanism are respectively connected to a control console. The adjustment method includes obtaining the depth of the pipe jacking machine at the position to be excavated, the relative density of the corresponding soil body and the preset excavation angle, and calculating the corresponding reference pressure. The present invention can solve the problem of difficult adjustment of pipe jacking processing in the prior art, has high adjustment efficiency, saves labor costs, and has a simple structure.

Description

Technical Field

[0001] The invention relates to the technical field of urban tunnel construction, and in particular to an automatic pipe jacking adjustment system and an adjustment method. Background Art

[0002] In the construction of existing urban subway tunnels, the jacking method is mostly used for processing. The specific method is to use the correction method combined with the total station and the correction oil pump, and adjust the jacking force and the amount of bentonite added according to experience. This method mainly uses the total station to monitor the deviation, and uses the correction oil pump to correct the deviation to ensure that the jacking of the jacking pipe is at the designed elevation. At the same time, the jacking force and the amount of bentonite are adjusted according to experience. Therefore, the deviation adjustment and the experience of adjusting the jacking force and the amount of bentonite play a vital role in the jacking process.

[0003] However, the use of total stations and correction oil pumps cannot monitor deviations in real time. It can only be observed when the jacking pipe deviation reaches a certain level, which can easily cause the jacking pipe to shift in position and the ground to deform and settle. The deviation can only be corrected by using correction oil pumps, which delays the construction period and has a poor correction effect. At the same time, the jacking force and the amount of bentonite are adjusted based on experience, which requires high skills from the construction personnel and has a poor adjustment effect. Summary of the invention

[0004] In view of the above-mentioned deficiencies in the prior art, the present invention provides an automatic pipe jacking adjustment system and an adjustment method thereof, which can solve the problem of difficult adjustment in pipe jacking processing in the prior art.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] Provided is an automatic adjustment system and method for jacking pipes, which include a pipe jacking machine and a detection mechanism. A machine base and a plurality of connected pipe sections are sequentially arranged at the rear side of the pipe jacking machine, the inner side of the machine base is connected to the edge of the pipe jacking machine through a deviation correction device, a pushing device is arranged between the middle of the pipe jacking machine and the machine base, the lower part of the pipe jacking machine is connected to the first pipe section through a screw conveyor, the detection mechanism includes a soil pressure sensor arranged in the screw conveyor, and a displacement angle sensor arranged at the outer edge position between the first pipe section and the second pipe section, and the pipe jacking machine, the machine base and the detection mechanism are respectively connected to a control console.

[0007] By setting up a soil pressure sensor, the face pressure is monitored in real time, so that the jacking force can be automatically adjusted. By setting up a displacement angle sensor, the deviation of the jacking machine head is monitored in real time. When the deviation exceeds the limit, the control console automatically adjusts the thrust of the rear jack and starts the correction device to correct the deviation, so as to ensure the reliability and accuracy of the jacking direction. By combining the two, the settlement of the soil above the jacking machine head is monitored in real time, and the amount of bentonite added is adjusted in real time according to the settlement and soil pressure.

[0008] In the above technical solution, preferably, there are four displacement angle sensors, which are respectively located in four directions of up, down, left and right on the outer side between the first pipe segment and the second pipe segment.

[0009] By setting up a plurality of displacement angle sensors, the angle deviation of the jacking pipe in each direction can be monitored, thereby ensuring the accuracy of monitoring.

[0010] In the above technical solution, preferably, the pipe section farthest away from the pipe jacking machine is connected to the jacking iron, and the jacking iron is connected to the jack.

[0011] By setting up jacks and jacks, the excavation force is provided to ensure the normal progress of the jacking pipe.

[0012] The present invention also provides an adjustment method based on the above-mentioned pipe jacking automatic adjustment system, which comprises the following steps:

[0013] S1. Obtain the depth h of the position where the pipe jacking machine is to be driven, the relative density λ of the corresponding soil, and the preset driving angle Calculate the corresponding reference pressure [P];

[0014] S2. When the pipe jacking machine is working, the controller obtains the face pressure P monitored by the soil pressure sensor in real time. 测 And the angle offset value monitored by the displacement angle sensor and displacement value L;

[0015] S3. Determine the face pressure P according to the preset allowable pressure value and the reference pressure [P] 测 Is it within the allowable range? 测 If it is not within the permissible range, the console increases the jacking force;

[0016] S4. Determine the rotation angle offset value according to the preset allowable rotation angle offset value Is it within the allowable range? If it is not within the allowable range, the console adjusts the jack thrust in the corresponding direction;

[0017] S5, according to the displacement value L and the angle offset value Calculate the displacement and settlement of the jacking pipe, obtain the ground displacement and settlement, and calculate the empty volume between the pipe segment and the hole;

[0018] S6. The control console calculates the volume of bentonite to be added according to the de-aired volume and automatically adds bentonite.

[0019] By acquiring the face pressure monitored by the soil pressure sensor and the angle offset and displacement values ​​monitored by the displacement angle sensor in real time, the accuracy of position monitoring is guaranteed, and bentonite can be added in real time so that processing can continue.

[0020] Furthermore, the calculation method of the reference pressure [P] is:

[0021] [P] = kγh,

[0022] Among them, k is the allowable range parameter, and the general value is 1.2 to 1.5.

[0023] By calculating the reference pressure, the jack thrust can be adjusted.

[0024] Further, the increase in the jack thrust P 增 The calculation method is:

[0025] P 增 =P 测 -[P].

[0026] By calculating the change in the jack's thrust, the working state of the jack can be adjusted in real time to ensure that the excavation work continues.

[0027] Furthermore, the allowable angle offset value The general value is 1.5°.

[0028] By setting the allowable angle deviation value, it can prevent the angle from deviating too much and exceeding the set range, thus affecting the normal progress of excavation.

[0029] Furthermore, the method for adjusting the jack thrust in the corresponding direction is:

[0030] S1, obtaining the direction of the displacement angle sensor that exceeds the allowable angle offset value range;

[0031] S2, calculating the thrust adjustment amount of the jack corresponding to the acquired direction;

[0032] S3, adjusting the jack thrust according to the calculated adjustment amount;

[0033] S4. Turn on the deviation correction device to correct the deviation until the data monitored by the displacement angle sensor returns to within the allowable angle deviation value range.

[0034] By adjusting the thrust force and correcting the deviation according to the calculation results, the accuracy of the adjustment is effectively guaranteed.

[0035] Furthermore, the adjustment amount P of the jack thrust 偏 The calculation formula is:

[0036]

[0037] Among them, k is the allowable range parameter, and the general value is 1.2 to 1.5.

[0038] The thrust is adjusted according to the reference pressure and deflection angle to ensure the accuracy and reliability of the adjustment.

[0039] Furthermore, the calculation method of the void volume and the amount of bentonite added includes:

[0040] S1, the depletion volume V 脱空 The calculation method is: V 脱空 =(D 顶管 +D 地面 )×B 顶管 ×L 顶管 ,

[0041] Among them, D 顶管 and D 地面 Respectively represent the displacement and settlement of the jacking pipe and the ground, B 顶管 and L 顶管 Respectively represent the width and length of the top pipe;

[0042] S2. The calculation method for the amount of expansive soil added is: V 膨润土 =V 孔洞 -V 脱空 ,

[0043] Among them, V 孔洞 is the volume of the hole at the segment location.

[0044] By adjusting the amount of expansive soil added in real time, the accuracy of pipe jacking processing is ensured and the construction efficiency is improved.

[0045] The main beneficial effects of the automatic pipe jacking adjustment system provided by the present invention are:

[0046] The present invention monitors the deviation of the pipe jacking machine head in real time by setting a displacement angle sensor. When the deviation exceeds the limit, the control console automatically adjusts the thrust of the rear jack and starts the deviation correction device to correct the deviation. When the deviation is eliminated, the deviation correction device is automatically stopped and the jacking force is readjusted to perform the jacking construction. In this way, the deviation can be controlled in real time to prevent the deviation from being affected by surface settlement caused by excessive deviation.

[0047] By setting up soil pressure sensors, the pressure on the tunnel face can be measured, and the jacking force can be automatically adjusted through data processing at the control console.

[0048] By combining the displacement angle sensor and the soil pressure sensor, the settlement of the soil above the jacking machine head is monitored in real time, and the amount of bentonite added is adjusted in real time according to the amount of settlement and the soil pressure.

[0049] The main beneficial effects of the adjustment method of the automatic adjustment system for jacking pipe provided by the present invention are:

[0050] By acquiring the face pressure monitored by the soil pressure sensor and the angle offset and displacement values ​​monitored by the displacement angle sensor in real time, it is possible to monitor the deviation control, jacking force, bentonite amount and other information of the pipe jacking machine in real time, and to effectively adjust these parameters through a small number of components, thereby ensuring the accuracy of the pipe jacking process and improving construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Figure 1 It is a structural schematic diagram of the present invention.

[0052] Figure 2 It is a schematic diagram of the connection relationship between the pipe jacking machine and the control console.

[0053] Figure 3 It is a flow chart of the adjustment method of the adjustment system.

[0054] Among them, 1. pipe jacking machine, 11. screw conveyor, 2. machine base, 21. correction device, 22. pushing device, 3. detection mechanism, 31. soil pressure sensor, 32. displacement angle sensor, 4. pipe section, 41. first pipe section, 42. second pipe section, 43. jack, 44. jacking iron, 5. control console. DETAILED DESCRIPTION

[0055] The present invention will be further described below in conjunction with the accompanying drawings:

[0056] like Figure 1 As shown, it is a structural schematic diagram of the automatic adjustment system for jacking pipe.

[0057] The automatic adjustment system for jacking pipes of the present invention comprises a pipe jacking machine and a detection mechanism. A base 2 and a plurality of connected pipe sections 4 are sequentially arranged at the rear side of the pipe jacking machine. The inner side of the base 2 is connected to the edge of the pipe jacking machine 1 through a deviation correction device 21. A jacking device 22 is arranged between the middle of the pipe jacking machine 1 and the base 2. The lower part of the pipe jacking machine 1 is connected to the first pipe section 41 through a screw conveyor 11. The detection mechanism 3 comprises an earth pressure sensor 31 arranged in the screw conveyor 11, and a displacement angle sensor 32 arranged at the outer edge position between the first pipe section 41 and the second pipe section 42. The pipe jacking machine 1, the base 2 and the detection mechanism 3 are respectively connected to a control console 5. The pipe section 4 farthest from the pipe jacking machine 1 is connected to a top iron 44, and the top iron 44 is connected to a jack 43.

[0058] By setting up a soil pressure sensor 31, the face pressure is monitored in real time, so that the jacking force can be automatically adjusted. By setting up a displacement angle sensor 32, the deviation of the head of the pipe jacking machine 1 is monitored in real time. When the deviation exceeds the limit, the console 5 automatically adjusts the thrust of the rear jack 43 and starts the deviation correction device 21 to correct the deviation, so as to ensure the reliability and accuracy of the jacking direction. By combining the two, the settlement of the soil above the head of the pipe jacking machine 1 is monitored in real time, and the amount of bentonite added is adjusted in real time according to the size of the settlement and the soil pressure. By setting up a top iron 44 and a jack 43, the excavation force is provided to ensure the normal progress of the pipe jacking.

[0059] There are four displacement angle sensors 32 , which are respectively located in the four directions of up, down, left, and right outside the first pipe section 41 and the second pipe section 42 .

[0060] By providing a plurality of displacement angle sensors 32, the angle deviation of the pipe jacking machine in each direction is monitored, thereby ensuring the accuracy of the monitoring.

[0061] The present invention also provides an adjustment method based on the above-mentioned automatic adjustment system for jacking pipes, such as Figure 3 As shown, it includes the following steps:

[0062] S1. Obtain the depth h of the position to be excavated by the pipe jacking machine 1, the relative density λ of the corresponding soil, and the preset excavation angle Calculate the corresponding reference pressure [P].

[0063] The calculation method of the reference pressure [P] is:

[0064] [P] = kγh,

[0065] Wherein, k is an allowable range parameter, and is generally taken as 1.2 to 1.5. The reference pressure is calculated so as to adjust the thrust of the jack 43.

[0066] S2. When the pipe jacking machine 1 is working, the control console obtains the face pressure P monitored by the soil pressure sensor 31 in real time. 测 and the rotation angle offset value monitored by the displacement rotation angle sensor 32 and displacement value L.

[0067] S3. Determine the face pressure P according to the preset allowable pressure value and the reference pressure [P] 测 Is it within the allowable range? 测 If it is not within the permissible range, the control console 5 increases the thrust of the jack 43 .

[0068] Specifically, the increase in the thrust force of the jack 43 is P 增 The calculation method is:

[0069] P 增 =P 测 -[P].

[0070] By calculating the change in the thrust force of the jack 43, the working state of the jack 43 can be adjusted in real time, thereby ensuring that the excavation work continues.

[0071] S4. Determine the rotation angle offset value according to the preset allowable rotation angle offset value Is it within the allowable range? If it is not within the permissible range, the control console 5 adjusts the thrust of the jack 43 in the corresponding direction.

[0072] Allowable rotation angle deviation The general value is 1.5°. By setting the allowable angle deviation value, it is possible to prevent the angle from deflecting too much and exceeding the set range, thus affecting the normal progress of excavation.

[0073] Further, the method for adjusting the thrust of the jack 43 in the corresponding direction is:

[0074] S4-1, obtaining the direction of the displacement angle sensor 32 that exceeds the allowable angle offset value range.

[0075] S4-2. Calculate the thrust adjustment amount of the jack 43 corresponding to the acquired direction.

[0076] Furthermore, the adjustment amount P of the thrust force of the jack 43 is 偏 The calculation formula is:

[0077]

[0078] Among them, k is the allowable range parameter, and the general value is 1.2 to 1.5.

[0079] The thrust is adjusted according to the reference pressure and deflection angle to ensure the accuracy and reliability of the adjustment.

[0080] S4-3. Adjust the jack thrust according to the calculated adjustment amount.

[0081] S4-4, start the deviation correction device 21 to correct the deviation until the data monitored by the displacement angle sensor 32 returns to within the allowable angle deviation value range.

[0082] By adjusting the thrust force and correcting the deviation according to the calculation results, the accuracy of the adjustment is effectively guaranteed.

[0083] S5, according to the displacement value L and the angle offset value The displacement and settlement of the pipe jacking machine 1 are calculated, and the displacement and settlement of the ground are obtained to calculate the empty volume between the pipe segment and the hole.

[0084] S6. The control console 5 calculates the volume of bentonite to be added according to the de-aired volume and automatically adds bentonite.

[0085] Furthermore, the calculation method of the void volume and the amount of bentonite added includes:

[0086] S1, the depletion volume V 脱空 The calculation method is: V 脱空 =(D 顶管 +D 地面 )×B 顶管 ×L 顶管 ,

[0087] Among them, D 顶管 and D 地面 represent the displacement and settlement of the pipe jacking machine 1 and the ground, respectively, and B 顶管 and L 顶管 Respectively represent the width and length of the pipe jacking machine 1;

[0088] S2. The calculation method for the amount of expansive soil added is: V 膨润土 =V 孔洞 -V 脱空 , where V 孔洞 is the volume of the hole at the segment location.

[0089] By adjusting the amount of expansive soil added in real time, the accuracy of pipe jacking processing is ensured and the construction efficiency is improved.

[0090] The accuracy of position monitoring is ensured by acquiring the face pressure monitored by the soil pressure sensor 31 and the angle offset value and displacement value monitored by the displacement angle sensor 32 in real time.

[0091] The above describes the specific embodiments of the present invention to facilitate those skilled in the art to understand the present invention, but it should be clear that the present invention is not limited to the scope of the specific embodiments. For those of ordinary skill in the art, as long as various changes are within the spirit and scope of the present invention as defined and determined by the attached claims, these changes are obvious, and all inventions and creations using the concept of the present invention are protected.

Claims

1. A method for adjusting an automatic pipe jacking adjustment system, characterized in that: The automatic adjustment system for jacking pipes includes a pipe jacking machine and a detection mechanism. A machine base and a plurality of connected pipe sections are sequentially arranged at the rear side of the pipe jacking machine. The inner side of the machine base is connected to the edge of the pipe jacking machine through a deviation correction device. A jacking device is arranged between the middle part of the pipe jacking machine and the machine base. The lower part of the pipe jacking machine is connected to the first pipe section through a screw conveyor. The detection mechanism includes a soil pressure sensor arranged in the screw conveyor and a displacement angle sensor arranged at the outer edge position between the first pipe section and the second pipe section. The pipe jacking machine, the machine base and the detection mechanism are respectively connected to the control console. The adjustment method of the automatic adjustment system for pipe jacking includes the following steps: S1. Obtain the depth h of the position where the pipe jacking machine is to be driven, the relative density λ of the corresponding soil, and the preset driving angle Calculate the corresponding reference pressure [P]; S2. When the pipe jacking machine is working, the controller obtains the face pressure P monitored by the soil pressure sensor in real time. 测 And the angle offset value monitored by the displacement angle sensor and displacement value L; S3. Determine the face pressure P according to the preset allowable pressure value and the reference pressure [P] 测 Is it within the allowable range? 测 If it is not within the permissible range, the console increases the jacking force; S4. Determine the rotation angle offset value according to the preset allowable rotation angle offset value Is it within the allowable range? If it is not within the allowable range, the console adjusts the jack thrust in the corresponding direction; S5, according to the displacement value L and the angle offset value Calculate the displacement and settlement of the jacking pipe, obtain the ground displacement and settlement, and calculate the empty volume between the pipe segment and the hole; S6. The control console calculates the volume of bentonite to be added according to the de-aired volume and automatically adds bentonite.

2. The adjustment method of the automatic adjustment system for pipe jacking according to claim 1, characterized in that: There are four displacement angle sensors, which are respectively located in four directions of up, down, left and right on the outer side between the first pipe segment and the second pipe segment.

3. The adjustment method of the automatic adjustment system for jacking pipe according to claim 1, characterized in that: The pipe section farthest from the pipe jacking machine is connected to the jacking iron, and the jacking iron is connected to the jack.

4. The adjustment method of the automatic adjustment system for jacking pipe according to claim 1, characterized in that: The calculation method of the reference pressure [P] is: [P] = kγh, Among them, k is the allowable range parameter, and the general value is 1.2 to 1.

5.

5. The adjustment method of the automatic adjustment system for jacking pipe according to claim 4, characterized in that: The increase in the jack thrust P 增 The calculation method is: P 增 =P 测 -[P]。 6. The adjustment method of the automatic adjustment system for pipe jacking according to claim 1, characterized in that: The allowable rotation angle deviation value The general value is 1.5°.

7. The adjustment method of the automatic adjustment system for jacking pipe according to claim 1, characterized in that: The method for adjusting the jack thrust in the corresponding direction is: S1, obtaining the direction of the displacement angle sensor that exceeds the allowable angle offset value range; S2, calculating the thrust adjustment amount of the jack corresponding to the acquired direction; S3, adjusting the jack thrust according to the calculated adjustment amount; S4. Turn on the deviation correction device to correct the deviation until the data monitored by the displacement angle sensor returns to within the allowable angle deviation value range.

8. The adjustment method of the automatic adjustment system for pipe jacking according to claim 7, characterized in that: The adjustment amount P of the jack thrust 偏 The calculation formula is: Among them, k is the allowable range parameter, and the general value is 1.2 to 1.

5.

9. The adjustment method of the automatic adjustment system for jacking pipe according to claim 7, characterized in that: The calculation method of the de-hollowing volume and the amount of bentonite added includes: S1. The calculation method of the degassing volume V degassing is: V 脱空 =(D 顶管 +D 地面 )×B 顶管 ×L 顶管 , Among them, D 顶管 and D 地面 Respectively represent the displacement and settlement of the jacking pipe and the ground, B 顶管 and L 顶管 Respectively represent the width and length of the top pipe; S2. The calculation method for the amount of expansive soil added is: V 膨润土 =V 孔洞 -V 脱空 , Among them, V 孔洞 is the volume of the hole at the segment location.

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