Construction method of permanent and temporary combined pipe gallery caisson support based on high-pressure protection

Abstract

The present invention discloses a permanent and temporary combined pipe gallery jacking caisson support construction method based on high-pressure protection, which relates to the technical field of building engineering construction. The method comprises the following steps: S1, constructing a water-stop curtain in accordance with on-site air restriction requirements; S2, constructing and sinking the jacking working well and the jacking receiving well in sections, and using a caisson vertical monitoring device 1 to detect the verticality of the caisson sinking; S3, constructing water-stop piles at the jacking opening; S4, installing the jacking system, completing jacking construction measurements, and jacking the pipes in sections; S5, excavating the pipe gallery foundation pit to the first support, selecting a support form for support; and S6, excavating the pipe gallery foundation pit to the pipe gallery base elevation. The present invention has the effect of improving the construction efficiency of pipe gallery jacking.

Description

Technical Field

[0001] The present application relates to the technical field of building engineering construction, and in particular to a permanent and temporary combined pipe gallery caisson support construction method based on high-pressure protection. Background Art

[0002] With rapid economic development, above-ground space utilization has gradually reached saturation. Underground integrated pipeline corridors, as an emerging architectural structure, effectively manage power, gas, sewage, and heat pipelines. This significantly conserves pipeline space while increasing underground space utilization. They also isolate pipelines from harmful soil substances, significantly reducing the risk of subsequent rework and repairs.

[0003] Since multiple types of pipelines need to be coordinated in underground pipeline corridors and some pipelines are buried at a great depth, the excavation of underground pipeline corridors often uses steel sheet piles or SMW piles as the foundation pit support form. After the support is completed, excavation operations are carried out, which requires a higher construction clearance and has disadvantages under high-voltage lines or in working environments with limited height requirements.

[0004] And because the pipeline is buried deep, deep foundation pit operations are required to ensure the pipeline is pulled through. The safety hazard of the workers is a major problem in construction. At the same time, when there is a height limit requirement, the mechanical operating height of the long-arm excavator and other machinery required for construction cannot meet the requirement. Therefore, it is necessary to adopt the jacking construction method. However, the accompanying problem is that the jacking working well and the receiving well are temporary support structures. After the construction is completed, they need to be broken and the pipeline backfilled before the pipeline corridor construction process can be carried out, which greatly increases the construction period compared to normal construction. Therefore, this application proposes a new technical solution. Summary of the Invention

[0005] In order to improve the construction efficiency of pipeline gallery top pipes, the present application provides a permanent and temporary combined pipeline gallery top pipe caisson support construction method based on high-pressure protection.

[0006] This application provides a permanent and temporary combined pipe gallery caisson support construction method based on high-pressure protection, which adopts the following technical solutions:

[0007] A permanent and temporary combined pipe gallery caisson support construction method based on high-pressure protection is characterized by comprising the following steps:

[0008] S1. Carry out the construction of water-stop curtain in accordance with the space restriction requirements on site;

[0009] S2. The jacking working well and the jacking receiving well are constructed and sunk in sections, and the verticality of the caisson sinking is detected using the caisson vertical monitoring device;

[0010] S3. Construction of water-stop piles at the top pipe opening;

[0011] S4. Install the jacking system, complete the jacking construction measurement, and jack the pipe in sections;

[0012] S5. Excavate the foundation pit of the pipe gallery to the first support and select the support form for support;

[0013] S6. Excavate the tunnel foundation pit to the tunnel base elevation.

[0014] Optionally, the caisson vertical monitoring device includes a control box, a connecting block, a lifting mechanism, a fixing mechanism and a laser ranging sensor, wherein the fixing mechanism is arranged on one side of the control box and is used to fix the control box on the inner wall of the caisson, the connecting block is located below the control box, the laser ranging sensor is arranged on the upper surface of the connecting block, and the detection end of the laser ranging sensor is arranged horizontally, the interior of the control box is hollow, the lifting mechanism is arranged in the inner cavity of the control box, the lifting part of the lifting mechanism is connected to the connecting block and is used to lift the connecting block, a contact sensor is fixedly connected to the bottom of the connecting block and is used to monitor whether the bottom of the connecting block contacts the bottom of the well, and a controller is arranged in the control box, and the controller is electrically connected to the lifting mechanism, the laser ranging sensor and the contact sensor;

[0015] Wherein, the controller is configured as follows:

[0016] If a caisson verticality detection command is received, the current time is defined as time T1, the detection value a1 fed back by the laser ranging sensor at time T1 is obtained, and the lifting mechanism is controlled to descend;

[0017] If the signal fed back by the contact sensor indicates that the bottom of the well has been touched, the lifting mechanism is controlled to stop responding and an alarm is output. The current time is defined as time T2, and the detection value a2 fed back by the laser ranging sensor at time T2 is obtained.

[0018] The detection value a1 is compared with the detection value a2. If the comparison result exceeds the preset qualified range, a preset skew prompt is output.

[0019] Optionally, the fixing mechanism includes a connecting seat, a slide, a fixing rod and a fixing seat, the connecting seat is vertically arranged, one end of the fixing seat is fixedly connected to the upper end of the connecting seat, and the fixing seat is horizontally arranged, and a sliding groove is provided on the lower surface of the fixing seat along its length, and one end of the slide is slidably connected to the sliding groove, and an adjustment component for adjusting the distance between the connecting seat and the slide is provided on the side wall of the connecting seat facing the slide, the side wall of the connecting seat abuts the inner wall of the caisson, and the side wall of the slide facing the connecting seat abuts the outer wall of the caisson, the adjustment component is located below the fixed seat, one end of the fixing rod is fixedly penetrated in the adjustment component, and the other end of the fixing rod is fixedly connected to the slide, and the control box is fixedly connected to the side wall of the connecting seat away from the slide.

[0020] Optionally, the adjusting assembly includes a support block, a sliding block, a limit block and a limit spring, the support block is fixedly connected to the side wall of the connecting seat facing the slide, and the support block is horizontally arranged, the interior of the support block is hollow and open toward the slide, the sliding block is slidably connected to the inner cavity of the support block, the side wall of the sliding block is provided with a groove, the limit spring is arranged in the groove, one end of the limit spring is fixedly connected to the bottom of the groove, and the other end of the limit spring is fixedly connected to the limit block, the side wall of the support block on one side of the groove is provided with a plurality of limit holes along its length direction, the end of the limit block away from the limit spring extends out of the groove and slides through the limit hole, and one end of the fixing rod is fixedly passed through the sliding block.

[0021] Optionally, the end of the limit block facing away from the limit spring is spherical.

[0022] Optionally, the lifting mechanism includes a drive motor, a roller, a rotating shaft and a traction rope. The drive motor is arranged on the inner wall of the control box, and the output shaft of the drive motor is arranged horizontally. One end of the rotating shaft is coaxially fixed to the output shaft of the drive motor, and the other end of the rotating shaft is connected to the inner cavity of the control box. The roller is fixedly sleeved on the rotating shaft, one end of the traction rope is fixedly connected to the cylinder of the roller, and the traction rope is wrapped around the cylinder of the roller. A through groove is opened through the bottom of the control box for the traction rope to slide through, and the other end of the traction rope extends vertically downward toward the through groove, and the upper end of the connecting block is fixedly connected to the traction rope.

[0023] Optionally, a embedding groove is provided on the lower surface of the connecting block, the contact sensor is fixedly connected in the embedding groove, and the detection end of the contact sensor is arranged vertically downward.

[0024] Optionally, the interior of the connection block is hollow, and a tilt sensor for detecting the tilt of the connection block is provided in the inner cavity of the connection block, and the tilt sensor is electrically connected to the controller, and the controller is configured as follows:

[0025] Obtain the detection value fed back by the tilt sensor and determine whether it meets the preset connection block tilt condition. If so, analyze the cause of the tilt;

[0026] If the analysis result is that the well wall is tilted, the detection values ​​fed back by the tilt sensor within the preset interval T3 are obtained and recorded, and are defined as detection value b1 and detection value b2 respectively;

[0027] Compare the detection value b1 with the detection value b2. If the comparison result is within the preset difference range, output the detection value b2.

[0028] If the analysis result shows that the well bottom is uneven, the detection value a3 of the laser ranging sensor feedback before the connection block tilt condition is met is output.

[0029] Optionally, the control box is provided with an opening along its width direction, and guide rails are provided at the openings on both side walls of the control box along its length direction. Sliding plates are provided on both side walls of the control box, and the sliding plates are slidingly connected to the openings of the control box through the guide rails. The drive motor is fixedly connected to the inner wall of the sliding plate on one side, and the end of the rotating shaft facing away from the drive motor is rotatably connected to the inner wall of the sliding plate on the other side of the control box.

[0030] Optionally, limiting grooves are respectively provided on the side walls on both sides of the limit block along the length direction thereof, and the limiting grooves are opened toward the side of the limit block away from the limiting spring. Two limiting plates are fixedly connected to the openings of the grooves, and the two limiting plates are respectively slidably connected to the limiting grooves on both sides of the limit block, and the side walls of the two limiting plates facing the bottom of the groove are respectively in contact with the side edges of the limiting grooves on both sides.

[0031] To sum up, the present application includes the following beneficial technical effects: the present application adopts a combination of permanent and temporary methods to organically combine caisson construction with pipe gallery support, and adopts caisson working well and receiving well structure as the support structure of the foundation pit to avoid damage to high-voltage wires by large machinery. At the same time, it can closely connect the pipeline construction with the pipe gallery structure construction process, greatly improving the construction efficiency of the pipe gallery top pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is a top view of the sinking of the caisson and the jacking of the pipe in an embodiment of the present application;

[0033] Figure 2 This is a front view of the sinking of the caisson and the jacking of the pipe in the embodiment of the present application;

[0034] Figure 3 This is a right side view of the caisson sinking and pipe jacking in an embodiment of the present application;

[0035] Figure 4 This is a schematic diagram of the structure of the caisson vertical detection device and the caisson during installation according to an embodiment of the present application;

[0036] Figure 5 This is a schematic diagram of the overall structure of the caisson vertical detection device according to an embodiment of the present application;

[0037] Figure 6 It is a structural diagram of the lifting mechanism of an embodiment of the present application;

[0038] Figure 7 is a structural diagram of the fixing mechanism of an embodiment of the present application;

[0039] Figure 8 is a schematic structural diagram of the adjustment component of an embodiment of the present application;

[0040] Figure 9It is a partial cross-sectional view of the connecting block of an embodiment of the present application.

[0041] Explanation of the accompanying drawings: 1. Caisson vertical monitoring device; 2. Control box; 21. Sliding plate; 3. Connecting block; 31. Laser ranging sensor; 32. Contact sensor; 33. Inclination sensor; 4. Lifting mechanism; 41. Driving motor; 42. Roller; 43. Rotating shaft; 44. Traction rope; 5. Fixing mechanism; 51. Connecting seat; 52. Slide; 53. Fixing rod; 54. Fixing seat; 55. Sliding groove; 56. Adjusting assembly; 561. Support block; 562. Sliding block; 563. Limiting block; 564. Limiting spring; 565. Limiting hole; 566. Limiting plate. DETAILED DESCRIPTION

[0042] The following is combined with Figure 1-9 This application is described in further detail.

[0043] The embodiment of the present application discloses a permanent and temporary combined pipe gallery caisson support construction method based on high-pressure protection.

[0044] Reference Figure 1 、 Figure 2 as well as Figure 3 The construction method of permanent and temporary combined pipe gallery caisson support based on high-pressure protection includes the following steps: S1, construction of a water-stop curtain in combination with the on-site space restriction requirements; S2, construction and sinking of the pipe jacking working well and the pipe jacking receiving well in sections, and use of the caisson vertical monitoring device 1 to detect the vertical situation of the caisson sinking; S3, construction of water-stop piles at the pipe jacking hole; S4, installation of the jacking system, completion of the jacking construction measurement, and jacking of the pipe jacking in sections; S5, excavation of the pipe gallery foundation pit to the first support, and selection of the support form for support; S6, excavation of the pipe gallery foundation pit to the pipe gallery base elevation.

[0045] In step S2, the specific process of section-by-section construction and sinking of the pipe jacking working well and the receiving well is as follows:

[0046] 1) Excavation of foundation pit to the starting and sinking elevation; 2) Construction of caisson blade feet and blade frames; 3) Fabrication of the first section of the caisson; 4) Sinking of the first section of the caisson and testing of its verticality using the caisson vertical monitoring device 1; 5) Construction, sinking and testing of the verticality of each caisson section; 6) Pouring of bottom concrete.

[0047] It should be noted that excavation of the foundation pit can only be carried out after the water-stop curtain reaches the strength required for on-site construction.

[0048] In step S4, the specific construction process of pipe jacking is as follows:

[0049] 1) Installation of the base, jacking backrest and frame; 2) Hoisting and lowering the pipe jacking machine into the well; 3) Installation of the jacking system; 4) Jacking construction measurement; 5) Starting jacking into the hole; 6) Jacking in sections; 7) Jacking the pipe out of the hole; 8) Closing the hole and replacing the mud; 9) Backfilling.

[0050] Among them, the jacking construction measurement is carried out by burying ground guide points near the two end wells during the construction process, using air guide points and ground guide points to measure the plane control results to the construction site, and using air guide points and ground guide points to establish a plane control network. The guide measurement uses a total station.

[0051] In step S5, the completed caisson structure is used as the main support structure on one side, and direct slope excavation or steel sheet piles can be selected as the support form on the other side according to construction requirements.

[0052] The two forms of caisson support and slope excavation are combined as the pipeline corridor support form. The specific construction process is as follows:

[0053] 1) Construction site fencing, surrounding evacuation roads and access roads, site leveling and pipeline relocation; 2) Construction of reinforced soil and water-stop curtain in the corridor pit; 3) Construction of caisson working well and receiving well, and jacking of jacking pipes; 4) Slope excavation to the lower elevation of the corridor foundation pit; 5) Completion of pouring the main structure of the corridor, backfilling sand to 0.5m above the top of the corridor, and continuing to backfill with plain fill to the roadbed bottom elevation.

[0054] The steel sheet pile support and caisson support are combined as the pipeline corridor support form, and the construction process is as follows:

[0055] 1) Construction site enclosure, surrounding evacuation roads and access roads, site leveling and pipeline relocation; 2) Construction of surrounding soil, steel sheet piles and water-stop curtains in the corridor pit; 3) Construction of caisson working wells and receiving wells, and jacking of jacking pipes: 4) Excavation to 0.5m below the first support and construction of the first support; 5) Excavation to 0.5m below the second support and construction of the second support; 6) Backfill to the bottom of the corridor cushion layer, construction of the corridor cushion layer and structural bottom plate; 7) After the concrete force transfer belt and structural bottom plate reach the design strength requirements, the second support is removed; 8) Complete the pouring of the entire corridor body and remove the first support.

[0056] Through the above settings, the caisson construction and the pipe gallery support are organically combined in a permanent and temporary manner. The caisson working well and the receiving well structure are used as the support structure of the foundation pit to avoid damage to the high-voltage wires by large machinery. At the same time, it can be closely connected with the pipe gallery structure construction process, effectively ensuring the safety and efficiency of the construction.

[0057] In another embodiment of the present application, referring to Figure 4 、 Figure 5 as well as Figure 6 , wherein the caisson vertical monitoring device 1 includes a control box 2, a connecting block 3, a lifting mechanism 4, a fixing mechanism 5 and a laser ranging sensor 31, the fixing mechanism 5 is connected to the side wall of the caisson, the control box 2 is connected to the fixing mechanism 5, and the control box 2 is located in the inner cavity of the caisson, the connecting block 3 is arranged below the control box 2, the laser ranging sensor 31 is fixedly connected to the upper surface of the connecting block 3 by bolts, and the detection end of the laser ranging sensor 31 is arranged horizontally, the interior of the control box 2 is hollow, the lifting mechanism 4 is arranged in the inner cavity of the control box 2, and the lifting part of the lifting mechanism 4 is connected to the connecting block 3, and the lifting and lowering of the connecting block 3 is realized by the lifting mechanism 4. A contact sensor 32 for monitoring whether the connecting block 3 contacts the bottom of the well is provided at the bottom of the connecting block 3. A controller is also installed in the control box 2, and the controller can be a PLC controller, which is electrically connected to the lifting mechanism 4, the laser ranging sensor 31 and the contact sensor 32;

[0058] Among them, the controller configuration is:

[0059] 1) If a caisson verticality detection instruction is received, the current time is defined as time T1, the detection value a1 fed back by the laser ranging sensor at time T1 is obtained, and the lifting mechanism 4 is controlled to descend;

[0060] It can be understood that the detection instruction for the verticality of the caisson refers to the staff pressing the start button prefabricated on the control box 2.

[0061] 2) If the signal fed back by the contact sensor 32 indicates that the bottom of the well has been touched, the lifting mechanism 4 is controlled to stop responding and an alarm is output. The current time is defined as time T2, and the detection value a2 fed back by the laser ranging sensor 31 at time T2 is obtained;

[0062] It is understandable that the alarm prompt may be a flashing signal light and an audible alarm sound preset by the controller.

[0063] 3) Compare the detection value a1 with the detection value a2. If the comparison result exceeds the preset qualified range, a preset skew prompt is output.

[0064] It is understandable that the preset qualified range is set by the staff according to different on-site construction requirements; the preset skew prompt can be the flashing of the preset skew indicator light on the controller.

[0065] Through the above-mentioned setting, the control box 2 is fixedly connected to the inner cavity of the caisson through the fixing mechanism 5, the detection end of the laser ranging sensor 31 is horizontally arranged and points to the inner wall of the caisson, and a display screen is provided on the upper surface of the control box 2 for displaying the detection value fed back by the laser ranging sensor 31, which is convenient for staff to observe. When the staff presses the start button prefabricated on the control box 2, the moment when the start button is pressed is defined as moment T1, and the detection value a1 fed back by the laser ranging sensor 31 at moment T1 is obtained. The lifting mechanism 4 drives the connecting block 3 to descend. When the signal fed back by the contact sensor 32 at the bottom of the connecting block 3 shows contact with the ground, the lifting mechanism 4 stops responding and outputs a preset alarm prompt so that the staff can handle it in time. At the same time, the current moment is defined as moment T2, and the detection value a2 fed back by the laser sensor 31 at moment T2 is obtained. The controller compares a1 and a2 and determines whether the comparison result exceeds the preset qualified range. If it exceeds the preset qualified range, a skew prompt is output. If the comparison result meets the preset qualified range, the detection values ​​a1 and a2 are displayed on the display screen to inform the staff of the detection result, thereby realizing the judgment of the verticality of the caisson.

[0066] Reference Figure 7 The fixing mechanism 5 includes a connecting seat 51, a slide 52, a fixing rod 53 and a fixing seat 54. The connecting seat 51 is vertically arranged, one end of the fixing seat 54 is fixedly connected to the upper surface of the connecting seat 51 by a bolt, and the fixing seat 54 is horizontally arranged, and a sliding groove 55 is opened on the lower surface of the fixing seat 54 along its length direction. The cross-section of the sliding groove 55 is T-shaped. One end of the slide 52 is fixedly connected to an extension block by bolts. The cross-section of the extension block is T-shaped, and the extension block is slidably connected to the sliding groove 55.

[0067] An adjustment component 56 for adjusting the distance between the connecting seat 51 and the slide 52 is provided on the side wall of the connecting seat 51 facing the slide 52. The adjustment component 56 is located below the fixed seat 54. One end of the fixing rod 53 is fixedly penetrated through the adjustment component 56, and the other end of the fixing rod 53 is fixedly connected to the slide 52. The control box 2 is fixedly connected to the side wall of the connecting seat 51 away from the slide 52 by bolts. The side wall of the connecting seat 51 abuts against the inner wall of the caisson, and the side wall of the slide 52 abuts against the outer wall of the caisson. It should be noted that the height of the slide 52 is higher than the height set by the adjustment component 56, so that the side wall of the caisson can be clamped between the connecting seat 51 and the slide 52 through the adjustment component 56, and the control box 2 can be fixed to the inner cavity of the caisson.

[0068] Through the above-mentioned setting, the adjusting component 56 abuts against the upper end of the caisson side wall, the connecting seat 51 extends into the inner cavity of the caisson, and the side wall of the connecting seat 51 abuts against the inner wall of the caisson. The distance between the slide 52 and the connecting seat 51 is adjusted by the adjusting component 56, so that the slide 52 and the connecting seat 51 clamp the caisson side wall to achieve the fixation of the control box 2. Since the distance between the slide 52 and the connecting seat 51 can be adjusted by moving the slide 52, the fixing mechanism 5 can adapt to different caissons, thereby improving the applicability of the caisson vertical monitoring device 1.

[0069] Reference Figure 7 and Figure 8 In another embodiment of the present application, in order to facilitate the sliding table 52 and the connecting seat 51 to clamp the side wall of the caisson, the side wall of the sliding table 52 can be pressed against the side wall of the caisson, the adjustment component 56 includes a support block 561, a sliding block 562, a limit block 563 and a limit spring 564. The support block 561 is fixedly connected to the side wall of the connecting seat 51 facing the sliding table 52 by bolts, and the support block 561 is horizontally arranged. The interior of the support block 561 is hollow and is opened toward the sliding table 52. Block 562 is slidably connected to the inner cavity of the support block 561, and a groove is provided on the side wall of the sliding block 562. A limit spring 564 is arranged in the groove. One end of the limit spring 564 is fixedly connected to the bottom of the groove, and the other end of the limit spring 564 is fixedly connected to the limit block 563. A plurality of limit holes 565 are provided on the side wall of the support block 561 on one side of the groove along its length direction. One end of the limit block 563 away from the limit spring 564 extends out of the limit groove and slides through the limit hole 565.

[0070] Through the above-mentioned arrangement, when fixing the device on the side wall of the caisson, the side wall of the connecting seat 51 is abutted against the inner wall of the caisson, and by pressing the limit block 563, the limit block 563 is extended into the groove, and the sliding block 562 is slid toward the support block 561, driving the side wall of the slide to abut against the outer wall of the caisson, so as to realize the fixation of the control box 2 in the inner cavity of the caisson.

[0071] Reference Figure 8 In order to facilitate pressing the limit block 563 to make the sliding block 562 slide, the end of the limit block 563 away from the limit spring 564 is set to be spherical.

[0072] Reference Figure 6 and Figure 9 The lifting mechanism 4 includes a drive motor 41, a roller 42, a rotating shaft 43 and a traction rope 44. The drive motor 41 is arranged in the inner cavity of the control box 2, and the output shaft of the drive motor 41 is arranged horizontally. The output shaft of the drive motor 41 is equipped with a coupling. The rotating shaft 43 is coaxially fixedly connected to the output shaft of the drive motor 41 through the coupling. The other end of the rotating shaft 43 is rotatably connected to the inner cavity of the control box 2. The roller 42 is fixedly sleeved on the rotating shaft 43. The output shaft of the drive motor 41 rotates to drive the roller 42 to rotate.

[0073] A clamp is fixedly connected to the cylinder of the drum 42 by bolts, and one end of the traction rope 44 is fixedly connected to the cylinder of the drum 42 by the clamp. The traction rope 44 is a tool commonly used in construction sites in the prior art for lifting, pulling and fixing structures. The traction rope 44 in this embodiment has the characteristics of high strength, wear resistance and deformation, and can adapt to larger pulling force.

[0074] The rope body of the traction rope 44 is connected to the cylinder body of the drum 42 by winding. A through groove is opened at the bottom of the control box 2 for the traction rope 44 to slide through. The other end of the traction rope 44 extends out of the through groove and extends vertically downward. The upper end of the connecting block 3 is fixedly connected to the end of the traction rope 44 extending out of the through groove.

[0075] With the above arrangement, the output shaft of the driving motor 41 drives the drum 42 to rotate, so that the traction rope 44 bound to the drum body of the drum 42 gradually separates from the drum, thereby achieving the lifting of the connecting block 3 at the lower end of the traction rope 44.

[0076] Reference Figure 9 A groove is provided on the lower surface of the connecting block 3, and the contact sensor 32 is fixedly connected to the groove, and the detection end of the contact sensor 32 is set vertically downward, so that when the connecting block 3 descends, the contact sensor 32 can detect the contact with the ground in time.

[0077] Reference Figure 9 In another embodiment of the present application, considering that the ground soil is uneven, when the connecting block 3 contacts the uneven ground, the detection end of the laser ranging sensor 31 is offset, causing the detection value at time T2 fed back by it to deviate from the detection value at time T1, resulting in a misjudgment. At the same time, when the caisson is offset, the caisson vertical monitoring device 1 is installed on the side wall of the offset side of the caisson. During the descent of the connecting block 3, its bottom surface will abut against the inner wall of the caisson, causing the contact sensor 32 to be unable to provide feedback, affecting the judgment of the descent of the connecting block 3. The interior of the connecting block 3 is hollow, and an inclination sensor 33 for detecting the inclination of the connecting block 3 is provided in the inner cavity of the connecting block 3. An opening is provided on one side of the connecting block 3 to facilitate the installation of the inclination sensor 33, and a detachable protective cover is installed at the opening.

[0078] The tilt sensor 33 is electrically connected to the controller and the controller is configured as follows:

[0079] Obtain the detection value fed back by the tilt sensor 33 and determine whether it meets the preset connection block tilt condition. If so, analyze the cause of the tilt;

[0080] It can be understood that the preset connection block tilt condition refers to the deviation between the detection value fed back by the inclination sensor 33 and the preset initial value. The preset initial value is the detection value of the inclination sensor 33 of the connection block 3 at a certain angle. In this embodiment, the preset initial value can be the detection value fed back by the inclination sensor 33 when the connection block 3 is in a horizontal state; the analysis of the cause of the tilt refers to the judgment based on the contact signal fed back by the contact sensor 32. If the detection signal fed back by the contact sensor 32 shows that the connection block 3 contacts the bottom of the caisson, the analysis result is that the well wall is tilted. Otherwise, the analysis result is that the bottom of the well is uneven.

[0081] If the analysis result shows that the well wall is tilted, the detection values ​​fed back by the tilt sensor 33 within the preset interval T3 are obtained and recorded, and are defined as detection value b1 and detection value b2 respectively;

[0082] It is understandable that the preset interval time T3 refers to the interval time between two adjacent detection values ​​fed back by the tilt sensor 33 , and can be set by the staff according to the needs of on-site operation. In this embodiment, the interval time T3 can be set to 10s.

[0083] Compare the detection value b1 with the detection value b2. If the comparison result is within the preset difference range, output the detection value b2.

[0084] It is understandable that the preset difference range is an angle value and can be set by the staff according to the on-site construction conditions.

[0085] If the analysis result shows that the well bottom is uneven, the detection value a3 fed back by the laser ranging sensor 31 before the tilt condition of the connecting block 3 is met is output.

[0086] Through the above settings, when the detection value fed back by the inclination sensor 33 deviates from the preset initial value, it means that the connecting block 3 has tilted. The cause of the tilt is analyzed by the detection signal fed back by the contact sensor 32. If the detection signal fed back by the contact sensor 32 shows that contact has occurred, the analysis result is that the bottom of the well is uneven. At this time, by comparing the detection values ​​a1 and a3 fed back by the laser ranging sensor 31 at time T1, and judging whether the comparison result exceeds the preset qualified range, it is determined whether the caisson is perpendicular to the ground, thereby eliminating the influence of the unevenness of the caisson ground on the judgment of the caisson verticality.

[0087] At the same time, if the contact sensor 32 does not detect a contact signal, it means that the connecting block 3 contacts the side wall of the caisson and tilts, that is, the caisson tilts. At this time, the lifting mechanism 4 continues to descend. Since the end of the connecting block 3 facing the connecting seat 51 is in contact with the inner wall of the caisson, the connecting block 3 tilts toward the side of the connecting seat 51 during the descent process. Until the comparison result of the detection value b1 and b2 fed back by the inclination sensor 33 within the interval T3 meets the preset difference range, the lifting mechanism 4 stops running, flashes the preset signal light and sounds an alarm to remind the staff, and inputs the detection value fed back by the inclination sensor 33 into the display. Since the bottom surface of the connecting block 3 is close to the inner wall of the caisson at this time, the detection value fed back by the inclination sensor 33 is close to the inclination of the caisson. The detection value fed back by the inclination sensor 33 can be used as a reference for the staff when adjusting the verticality of the caisson.

[0088] Reference Figure 6 and Figure 9 When the connecting block 3 sinks close to the inner wall of the caisson, it is convenient to check the verticality of the caisson. At the same time, considering that the fixing mechanism 5 is fixed by clamping the side wall of the caisson through the connecting seat 51 and the slide 52 during installation, a certain space needs to be reserved between the connecting block 3 and the inner wall of the caisson to avoid the connecting block 3 colliding with the inner wall of the caisson due to the shaking caused by the installation of the fixing mechanism 5. The control box 2 is provided with a through opening along its width direction, and guide rails are provided at the through openings on both side walls of the control box 2 along its length direction, and sliding plates 21 are respectively installed at the through openings on both sides of the control box 2. The sliding plates 21 are constrained by the guide rails so that the sliding plates 21 can be slidably connected to the control box 2. A fixing frame is installed on the inner wall of the sliding plate 21 on one side, and the drive motor 41 is mounted on the fixing frame and fixed by bolts, and the output shaft of the drive motor 41 extends horizontally toward the sliding plate 21 on the other side. A bearing seat is installed on the inner wall of the sliding plate 21 on the other side, and the end of the rotating shaft 43 facing away from the drive motor 41 is rotatably connected to the control box 2 through the bearing seat. In order to facilitate the movement of the lifting mechanism 4 in the control box, a handle is installed on the side wall of the sliding plate 21 by bolts.

[0089] Through the above arrangement, when the control box 2 is installed on the inner wall of the caisson through the fixing mechanism 5, the sliding plate 21 is slid by the handle to make the lifting mechanism 4 slide as a whole in the direction away from the side of the connecting seat 51, and the distance between the connecting block 3 and the connecting seat 51 is increased, and a certain space is reserved for the connecting block 3 and the inner wall of the caisson, which is convenient for the installation and fixation of the fixing mechanism 5. After the fixing mechanism 5 is fixed, the distance between the connecting block 3 and the inner wall of the caisson on the side of the connecting seat 51 can be adjusted by sliding the sliding plate 21, so as to facilitate the detection of the verticality of the caisson through the connecting block 3. It should be noted that the friction between the sliding plate 21 and the guide rail is large, and the measurement result of the connecting block 3 will not be deviated due to the movement of the sliding plate 21 itself.

[0090] Reference Figure 8 In another embodiment of the present application, to position the sliding block 562 within the inner cavity of the support block 561, the sidewalls of the limiting block 563 are provided with limiting grooves along their length, and the limiting grooves on both sides of the sidewalls are symmetrically arranged. Two limiting plates 566 are fixedly connected to the openings of the grooves via bolts, and the two limiting plates 566 are respectively located in the limiting grooves on both sides of the limiting block 563 and are slidably connected to the limiting grooves. When the limit spring 564 is in an extended state, the limit spring 564 pushes the limit block 563 into the limit hole 565, and the two limit plates 566 respectively abut the side edges of the limit grooves on both sides, which limit the sliding of the limit block 563. At the same time, the inner wall of the limit hole 565 abuts the side wall of the limit block 563, and the limit plate 566 abuts the side wall of the limit block 563. The sliding block 562 cannot slide in the inner cavity of the support block 561, so that the sliding block 562 is limited, ensuring that when the fixing mechanism 5 is vertically monitored in the caisson, it will not loosen and affect the actual monitoring situation.

[0091] The implementation principle of this embodiment is: the caisson construction is combined with the pipe gallery support in a permanent and temporary combination manner, the caisson working shaft and the receiving shaft structure are used as the support structure on one side of the foundation pit, and the caisson is monitored by a caisson vertical monitoring device 1. The caisson vertical monitoring device 1 raises and lowers the connecting block 3, and feedback is given by the contact sensor 32 at the bottom of the connecting block 3 as to whether the connecting block is in contact with the ground, and judges whether the caisson is perpendicular to the ground based on the detection values ​​a1 and a2 fed back by the laser ranging sensor 31 when the connecting block 3 is lowered. Taking into account the influence of the ground flatness on the detection value a2 of the laser ranging sensor 31, an inclination sensor 33 is arranged inside the connecting block 3. When the inclination sensor 33 detects a tilt signal, the detection values ​​a1 and a3 fed back by the laser ranging sensor 31 are compared to judge the verticality of the caisson. If the inclination sensor 33 detects a tilt signal when the contact sensor 32 does not feed back a contact signal, it detects that the caisson is tilted and feeds back to the staff for timely adjustment. At the same time, the support work on the other side is carried out by directly sloped or steel sheet piles according to the construction requirements to complete the construction of the pipeline corridor, avoid the restrictions on construction caused by height restrictions, and at the same time ensure that the pipeline construction and the pipeline corridor structure construction processes are closely connected, effectively ensuring the safety and efficiency of the construction.

[0092] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A permanent and temporary combined pipe gallery caisson support construction method based on high-pressure protection, characterized by: The following steps are involved: S1. Carry out the construction of water-stop curtain in accordance with the space restriction requirements on site; S2. The jacking working well and the jacking receiving well are constructed and sunk in sections, and the verticality of the caisson sinking is detected using the caisson verticality monitoring device (1); S3. Construction of water-stop piles at the top pipe opening; S4. Install the jacking system, complete the jacking construction measurement, and jack the pipe in sections; S5. Excavate the foundation pit of the pipe gallery to the first support and select the support form for support; S6. Excavate the foundation pit of the pipe gallery to the base elevation of the pipe gallery; The caisson vertical monitoring device (1) comprises a control box (2), a connecting block (3), a lifting mechanism (4), a fixing mechanism (5) and a laser distance sensor (31), wherein the fixing mechanism (5) is arranged on one side of the control box (2) and is used to fix the control box (2) on the inner wall of the caisson, the connecting block (3) is located below the control box (2), the laser distance sensor (31) is arranged on the upper surface of the connecting block (3), and the detection end of the laser distance sensor (31) is arranged horizontally, the interior of the control box (2) is hollow, the lifting mechanism (4) is arranged in the inner cavity of the control box (2), the lifting part of the lifting mechanism (4) is connected to the connecting block (3) and is used to lift the connecting block (3), the bottom of the connecting block (3) is fixedly connected to a contact sensor (32) and is used to monitor whether the bottom of the connecting block (3) contacts the bottom of the well, and a controller is arranged in the control box (2), and the controller is electrically connected to the lifting mechanism (4), the laser distance sensor (31) and the contact sensor (32); Wherein, the controller is configured as follows: If a caisson verticality detection instruction is received, the current moment is defined as moment T1, the detection value a1 fed back by the laser ranging sensor (31) at moment T1 is obtained, and the lifting mechanism (4) is controlled to descend; If the signal fed back by the contact sensor (32) indicates that the bottom of the well has been touched, the lifting mechanism (4) is controlled to stop responding and output an alarm prompt, and the current time is defined as time T2, and the detection value a2 fed back by the laser ranging sensor (31) at time T2 is obtained; Compare the test value a1 with the test value a2. If the comparison result exceeds the preset qualified range, output a preset skew prompt. The interior of the connecting block (3) is hollow, and the inner cavity of the connecting block (3) is provided with an inclination sensor (33) for detecting the inclination of the connecting block (3). The inclination sensor (33) is electrically connected to a controller, and the controller is configured as follows: Obtaining the detection value fed back by the tilt sensor (33), and determining whether it meets the preset connection block tilt condition, and if so, analyzing the cause of the tilt; If the analysis result is that the well wall is tilted, the detection value fed back by the tilt sensor (33) within the preset interval time T3 is obtained and recorded, and is defined as the detection value b1 and the detection value b2 respectively; Compare the detection value b1 with the detection value b2. If the comparison result is within the preset difference range, output the detection value b2. If the analysis result shows that the well bottom is uneven, the detection value a3 fed back by the laser ranging sensor (31) before the connection block tilt condition is met is output.

2. The construction method for permanent and temporary combined pipe gallery top pipe caisson support based on high pressure protection according to claim 1 is characterized by: The fixing mechanism (5) includes a connecting seat (51), a slide (52), a fixing rod (53) and a fixing seat (54). The connecting seat (51) is vertically arranged, one end of the fixing seat (54) is fixedly connected to the upper end of the connecting seat (51), and the fixing seat (54) is horizontally arranged. A sliding groove (55) is provided on the lower surface of the fixing seat (54) along its length direction. One end of the slide (52) is slidably connected to the sliding groove (55). A side wall of the connecting seat (51) facing the slide (52) is provided with a sliding groove (55) for adjusting the connection. An adjusting assembly (56) for adjusting the distance between the connecting seat (51) and the slide (52), wherein the side wall of the connecting seat (51) abuts against the inner wall of the caisson, and the side wall of the slide (52) facing the connecting seat (51) abuts against the outer wall of the caisson, the adjusting assembly (56) is located below the fixing seat (54), one end of the fixing rod (53) is fixedly provided in the adjusting assembly (56), and the other end of the fixing rod (53) is fixedly connected to the slide (52), and the control box (2) is fixedly connected to the side wall of the connecting seat (51) facing away from the slide (52).

3. The construction method for permanent and temporary combined pipe gallery top pipe caisson support based on high pressure protection according to claim 2 is characterized by: The adjustment assembly (56) includes a support block (561), a sliding block (562), a limit block (563) and a limit spring (564). The support block (561) is fixedly connected to the side wall of the connecting seat (51) facing the slide (52), and the support block (561) is horizontally arranged. The interior of the support block (561) is hollow and is opened toward the slide (52). The sliding block (562) is slidably connected to the inner cavity of the support block (561). The side wall of the sliding block (562) is provided with a groove. The limit spring (564) is arranged in the groove, one end of the limit spring (564) is fixedly connected to the bottom of the groove, and the other end of the limit spring (564) is fixedly connected to the limit block (563), and the side wall of the support block (561) on one side of the groove is provided with a plurality of limit holes (565) along its length direction, and one end of the limit block (563) away from the limit spring (564) extends out of the groove and slides through the limit hole (565), and one end of the fixed rod (53) is fixedly passed through the sliding block (562).

4. The construction method for permanent and temporary combined pipe gallery top pipe caisson support based on high pressure protection according to claim 3 is characterized by: One end of the limiting block (563) facing away from the limiting spring (564) is arranged in a spherical shape.

5. The construction method for permanent and temporary combined pipe gallery top pipe caisson support based on high pressure protection according to claim 1 is characterized in that: The lifting mechanism (4) includes a driving motor (41), a roller (42), a rotating shaft (43) and a traction rope (44), wherein the driving motor (41) is arranged in the inner cavity of the control box (2), and the output shaft of the driving motor (41) is arranged horizontally, one end of the rotating shaft (43) is coaxially fixed to the output shaft of the driving motor (41), and the other end of the rotating shaft (43) is connected to the inner wall of the control box (2), the roller (42) is fixedly sleeved on the rotating shaft (43), one end of the traction rope (44) is fixedly connected to the cylinder of the roller (42), and the traction rope (44) is wound around the cylinder of the roller (42), a through groove for the traction rope (44) to slide through is opened through the bottom of the control box (2), the other end of the traction rope (44) is vertically extended downward toward the through groove, and the upper end of the connecting block (3) is fixedly connected to the traction rope (44).

6. The construction method for permanent and temporary combined pipe gallery top pipe caisson support based on high pressure protection according to claim 5 is characterized by: The lower surface of the connection block (3) is provided with an embedding groove, the contact sensor (32) is fixedly connected in the embedding groove, and the detection end of the contact sensor (32) is arranged vertically downward.

7. The construction method for permanent and temporary combined pipe gallery caisson support based on high pressure protection according to claim 5 is characterized by: The control box (2) is provided with an opening along its width direction, and guide rails are provided at the openings of the side walls on both sides of the control box (2) along its length direction. Sliding plates (21) are provided on the side walls on both sides of the control box (2), and the sliding plates (21) are connected to the openings of the control box (2) through sliding constraints of the guide rails. The drive motor (41) is fixedly connected to the inner wall of the sliding plate (21) on one side, and the end of the rotating shaft (43) facing away from the drive motor (41) is rotatably connected to the inner wall of the sliding plate (21) on the other side of the control box (2).

8. The construction method for permanent and temporary combined pipe gallery top pipe caisson support based on high pressure protection according to claim 4 is characterized by: The side walls on both sides of the limit block (563) are respectively provided with limit grooves along the length direction thereof, and two limit plates (566) are fixedly connected to the openings of the grooves. The two limit plates (566) are respectively slidably connected to the limit grooves on both sides of the limit block (563), and the side walls of the two limit plates (566) facing the bottom of the groove are respectively in contact with the side edges of the two ends of the limit grooves on both sides.

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