Real-time offset monitoring method for miniature pipe curtain jacking of auger soil discharge

Abstract

A real-time offset monitoring method for miniature pipe curtain jacking of auger soil discharge. The real-time offset monitoring method comprises: welding a measurement auxiliary pipe (8) to an outer wall of a pipe curtain steel pipe (1), providing a laser pen (9) inside the front end of the measurement auxiliary pipe (8), and enabling a light beam emitted by the laser pen (9) to be emitted to the rear end of the pipe from the front end of the pipe along the interior of the measurement auxiliary pipe (8); and after the measurement auxiliary pipe (8) is mounted, symmetrically welding a male lock catch (7) and a female lock catch (6) of the pipe curtain steel pipe (1) by taking a line connecting the center of the measurement auxiliary pipe (8) and the center of the pipe curtain steel pipe (1) as an axis, and connecting the male lock catch and the female lock catch with the pipe curtain steel pipe (1) to form a whole; fixedly mounting a measurement plate (10) on a housing of a pipe curtain drilling machine (20), such that a center point of the measurement plate (10) coincides with the light beam of the laser pen (9); and when the pipe curtain steel pipe (1) is jacked, observing changes of the position of the laser beam on the measurement plate (10), so as to know the displacement of a drill bit (5) of the pipe curtain drilling machine (20) from the pipe curtain steel pipe (1) in real time. The monitoring method solves the problem that the miniature pipe jacking of auger soil discharge cannot realize real-time measurement of jacking, and can also realize real-time monitoring for the displacement of a jacked pipe curtain steel pipe (1).

Description

A real-time offset monitoring method for spiral soil drainage micro-pipe curtain jacking pipe Technical Field

[0001] The invention belongs to the technical field of pipe-roof jacking construction, and in particular relates to a real-time offset monitoring method for a spiral earth-draining micro-pipe-roof jacking. Background Art

[0002] The pipe curtain method is a pre-excavation support technology used for underground tunnel construction. It forms an advanced support system by jacking densely packed steel pipes. Locking joints are used between the pipes to combine the individual pipes into a sealed pipe curtain, increasing overall support strength while also providing effective water-stopping. Common pipe curtain construction methods include slurry jacking, earth pressure balance jacking, and spiral micro-jacking, depending on the pipe diameter and geological conditions. The spiral micro-jacking method is often used for jacking small-diameter pipe curtains. During large-diameter pipe jacking, a measuring light target and camera are typically installed at the rear of the jacking machine head. A light source mounted at the front end of the pipe mouth emits a beam onto the measuring light target. The camera observes the relative position of the light beam and the center point of the light target to determine pipe displacement during jacking. This measurement method requires sufficient space inside the pipe to accommodate the measuring light target and camera, allowing the beam from the pipe mouth to enter the pipe.

[0003] However, for the spiral earth removal micro-pipe jacking method for jacking small-diameter steel pipes, the diameter of the pipe itself is very small, and the internal space of the pipe is almost entirely occupied by the spiral drill rod, making it impossible to install relevant measuring equipment and to achieve real-time measurement while jacking. In existing spiral earth removal micro-pipe jacking measurement methods, it is usually necessary to dismantle the jacking equipment and withdraw the spiral drill rod before measurement can be carried out, or observe the elevation deviation of the pipe through water level measurement, but it is impossible to obtain information on the left and right deviation of the pipe in the horizontal direction. Due to the limitations of pipe diameter and construction technology, existing methods cannot achieve real-time measurement during the jacking process, which makes it extremely difficult to timely correct deviation and adjust the posture during the jacking of the light pipe of the pipe curtain. Summary of the Invention

[0004] The purpose of the present invention is to provide a real-time displacement monitoring method for a spiral earth-draining micro-pipe jacking pipe, so as to solve the problem that the spiral earth-draining micro-pipe jacking pipe described in the above background technology cannot achieve real-time measurement of jacking, and at the same time realize real-time monitoring of the displacement of the pipe curtain steel pipe that has been jacked.

[0005] To achieve the above objectives, the present invention provides the following technical solutions.

[0006] A method for real-time displacement monitoring of a spiral soil drainage micro-pipe curtain jacking pipe comprises the following steps:

[0007] Step 1: Weld a measuring auxiliary tube to the outer wall of the tube curtain steel tube. A laser pen is installed inside the front end of the measuring auxiliary tube. The light beam emitted by the laser pen is parallel to the axial direction of the measuring auxiliary tube. The light beam is emitted from the front end of the tube along the inside of the measuring auxiliary tube to the rear end of the tube.

[0008] After the installation of the measuring auxiliary pipe is completed, the male lock buckle and the female lock buckle of the pipe curtain steel pipe are symmetrically welded with the line connecting the center of the measuring auxiliary pipe and the center of the pipe curtain steel pipe as the axis, and are connected to the pipe curtain steel pipe as a whole;

[0009] Step 2: Fix the pipe-roof drilling rig at a predetermined position, and install the pipe-roof steel pipe with the measuring auxiliary tube, male locking buckle, and female locking buckle described in Step 1 onto the spiral drill rod of the pipe-roof drilling rig;

[0010] Step 3: After the pipe curtain steel pipes are placed, a measuring plate is fixed on the pipe curtain drilling rig housing so that the center point of the measuring plate coincides with the beam of the laser pointer;

[0011] Step 4: When the pipe curtain steel pipe is jacked in, the change in the laser beam position on the measuring plate is observed to obtain the offset of the drill bit of the pipe curtain drill rig and the pipe curtain steel pipe in real time;

[0012] Step 5: After the previous pipe curtain steel pipe is pushed in, move the pipe curtain drill to the predetermined position of the next pipe curtain steel pipe and repeat the operation of step 2; with the laser beams of the previous pipe curtain steel pipe and the next pipe curtain steel pipe as the center, respectively install measuring plates on both sides of the pipe curtain drill body, so that the laser beam on the previous pipe curtain steel pipe and the laser beam on the next pipe curtain steel pipe are respectively projected toward the center of the two measuring plates; in this way, when the next pipe curtain steel pipe is pushed in, the offset of the pipe curtain steel pipe can be measured in real time, and the displacement change of the previous pipe curtain steel pipe that has been pushed in can be monitored in real time;

[0013] Step 6: Repeat step 5 until the last pipe curtain steel pipe is pushed in.

[0014] In the above technical solution, the auxiliary measurement tube is a steel tube.

[0015] In the above technical solution, the diameter of the auxiliary measurement tube is preferably 4-8 cm.

[0016] In the above technical solution, the central axis of the measurement auxiliary pipe and the central axis of the pipe curtain steel pipe are parallel to each other.

[0017] In the above technical solution, the front end of the measuring auxiliary pipe is made into a conical head to reduce the soil resistance encountered during the jacking process.

[0018] In the above technical solution, the male lock buckle includes two L-shaped steel plates bent outward, and the female lock buckle includes two L-shaped steel plates bent inward.

[0019] In the above technical solution, in step 2, the posture of the pipe curtain steel pipe is adjusted so that its position and slope meet the requirements, and a top ring washer is set between the jacking device of the pipe curtain drilling rig and the pipe curtain steel pipe.

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

[0021] (1) The present invention solves the problem that it is impossible to achieve real-time measurement from the inside of the pipe during the construction of the spiral soil drainage micro-pipe curtain jacking pipe by arranging a measuring auxiliary pipe on the outer wall of the pipe curtain steel pipe; and the male lock buckle and the female lock buckle of the pipe curtain steel pipe are symmetrically welded with the center of the measuring auxiliary pipe and the center of the pipe curtain steel pipe as the axis, which is convenient to manufacture and install, with low cost, and will not affect the normal jacking of the pipe curtain steel pipe and the connection of adjacent pipe curtain jacking pipes.

[0022] (2) The measurement process of the present invention does not require the assistance of a camera or other measuring instruments, and the operator can intuitively observe the deviation of the pipeline during jacking.

[0023] (3) The present invention can not only measure the offset of the current pipe curtain steel pipe in real time, but also monitor the displacement change of the previous pipe curtain steel pipe that has been pushed in real time. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic diagram of the spiral soil drainage micro-pipe curtain top pipe.

[0025] FIG2 is a front view of the pipe curtain steel pipe with the measurement auxiliary pipe and the male and female locking buckles installed in the present invention.

[0026] FIG3 is a side view of the jacking measurement of the first pipe curtain steel pipe in the present invention.

[0027] FIG4 is a top view of the jacking measurement of the first pipe curtain steel pipe in the present invention.

[0028] FIG5 is a front view of the locking connection between the previous pipe-roof steel pipe and the next pipe-roof steel pipe in the present invention.

[0029] FIG6 is a top view of the jacking measurement of the previous pipe curtain steel pipe and the displacement monitoring of the next pipe curtain steel pipe in the present invention.

[0030] FIG7 is a schematic diagram of the measurement board.

[0031] In order to better illustrate the measurement and monitoring principles of the present invention and clearly show the position of the laser beam, the male and female locking buckles of the pipe curtain steel pipes are not shown in Figures 4 and 6.

[0032] For ordinary technicians in this field, other relevant drawings can be obtained based on the above drawings without any creative work. DETAILED DESCRIPTION

[0033] The present invention will be further described in detail below with reference to specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0034] A real-time offset monitoring method for a spiral soil drainage micro-pipe curtain top pipe, see Figures 1 to 7, specifically includes the following steps.

[0035] Step 1: Weld an auxiliary measuring tube 8 to the outer wall of the pipe-roof steel pipe 1. This auxiliary measuring tube 8 is a steel pipe, with its central axis parallel to the central axis of the pipe-roof steel pipe 1. Preferably, the diameter of the auxiliary measuring tube 8 is 4-8 cm, and the front end (i.e., bottom) of the auxiliary measuring tube 8 is tapered to reduce soil resistance during jacking.

[0036] A laser pen 9 is provided inside the front end of the auxiliary measuring tube 8 . The light beam emitted by the laser pen 9 is parallel to the axial direction of the auxiliary measuring tube 8 . The light beam is emitted from the front end of the tube along the inside of the auxiliary measuring tube 8 to the rear end of the tube.

[0037] After the auxiliary measuring tube 8 is installed, the male locking buckle 7 and the female locking buckle 6 of the pipe-roof steel tube 1 are symmetrically welded with the line connecting the center of the auxiliary measuring tube 8 and the center of the pipe-roof steel tube 1 as the axis, thus being integrally connected to the pipe-roof steel tube 1, as shown in FIG2 .

[0038] Furthermore, referring to FIG2 , the male locking buckle 7 includes two L-shaped steel plates bent outward, and the female locking buckle 6 includes two L-shaped steel plates bent inward, thereby enabling two adjacent pipe curtain steel pipes 1 to be connected through the male locking buckle 7 and the female locking buckle 6 .

[0039] Step 2: Fix the pipe curtain drilling rig 20 in a predetermined position, and install the pipe curtain steel pipe 1 with the measuring auxiliary tube 8, male locking buckle 7 and female locking buckle 6 described in step 1 on the spiral drill rod 2 of the pipe curtain drilling rig 20. Adjust the posture of the pipe curtain steel pipe 1 so that its position and slope meet the requirements, and set a top ring washer 4 between the jacking device 5 of the pipe curtain drilling rig 20 and the pipe curtain steel pipe 1.

[0040] Step 3: After the pipe roof steel pipe 1 is placed, a measuring plate 10 is fixed to the housing of the pipe roof drilling rig so that the center point of the measuring plate 10 coincides with the beam of the laser pointer 9, as shown in Figures 3 and 4.

[0041] Step 4: When the pipe-roof steel pipe 1 is pushed forward, the position change of the laser beam on the measuring plate 10 is observed by naked eyes to grasp the offset of the drill bit 3 of the pipe-roof drilling rig and the pipe-roof steel pipe 1 in real time.

[0042] In step 5, after the previous pipe-roof steel pipe 1 is pushed in, the pipe-roof drill rig 20 is moved to the predetermined position of the next pipe-roof steel pipe 1 and the operation in step 2 is repeated. With the laser beams of the previous and next pipe-roof steel pipes 1 as the center, measuring plates 10 are installed on both sides of the pipe-roof drill rig body, so that the laser beams on the previous and next pipe-roof steel pipes 1 are directed toward the centers of the two measuring plates 10, respectively. In this way, as the next pipe-roof steel pipe 1 is pushed in, not only can the deflection of the pipe-roof steel pipe 1 be measured in real time, but also the displacement changes of the previous pipe-roof steel pipe 1 that has been pushed in can be monitored in real time. This is shown in Figures 5 and 6.

[0043] Step 6: Repeat the operation of step 5 until the last pipe curtain steel pipe 1 is pushed in.

[0044] For ease of description, spatially relative terms such as "upper," "lower," "left," and "right" are used in the embodiments to describe the relationship of one element or feature shown in the figures relative to another element or feature. It should be understood that in addition to the orientation shown in the figures, the spatial terms are intended to include different orientations of the device during use or operation. For example, if the device in the figures is inverted, an element described as being "below" another element or feature would be positioned "above" the other element or feature. Therefore, the exemplary term "below" can include both upper and lower orientations. The device can be positioned in other ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here should be interpreted accordingly.

[0045] Moreover, relational terms such as “first” and “second” are merely used to distinguish one component from another having the same name, but do not necessarily require or imply any actual relationship or order between these components.

[0046] The above is an exemplary description of the present invention. It should be noted that, without departing from the core of the present invention, any simple deformation, modification or other equivalent replacement that can be made by other skilled in the art without expending creative labor falls within the scope of protection of the present invention.

Claims

1. A real-time offset monitoring method for a spiral soil drainage micro-pipe curtain top pipe, comprising the following steps: Step 1, welding a measuring auxiliary tube to the outer wall of the tube curtain steel tube, the central axis of the measuring auxiliary tube and the central axis of the tube curtain steel tube are parallel to each other; a laser pen is arranged inside the front end of the measuring auxiliary tube, the light beam emitted by the laser pen is parallel to the axial direction of the measuring auxiliary tube, and the light beam is emitted from the front end of the tube along the inside of the measuring auxiliary tube to the rear end of the tube; After the installation of the measuring auxiliary pipe is completed, the male lock buckle and the female lock buckle of the pipe curtain steel pipe are symmetrically welded with the line connecting the center of the measuring auxiliary pipe and the center of the pipe curtain steel pipe as the axis, and are connected to the pipe curtain steel pipe as a whole; Step 2, fix the pipe curtain drilling rig at a predetermined position, and install the pipe curtain steel pipe with the measuring auxiliary pipe, male locking buckle and female locking buckle described in step 1 on the spiral drill rod of the pipe curtain drilling rig; Step 3, after the pipe curtain steel pipe is placed, a measuring plate is fixedly installed on the casing of the pipe curtain drilling rig so that the center point of the measuring plate coincides with the beam of the laser pen; Step 4: When the pipe curtain steel pipe is pushed in, the change of the laser beam position on the measuring plate is observed to obtain the offset of the drill bit of the pipe curtain drilling rig and the pipe curtain steel pipe in real time; Step 5, after the previous pipe curtain steel pipe is pushed in, move the pipe curtain drill to the predetermined position of the next pipe curtain steel pipe, and repeat the operation of step 2; with the laser beams of the previous pipe curtain steel pipe and the next pipe curtain steel pipe as the center, respectively install measuring plates on both sides of the pipe curtain drill body, so that the laser beam on the previous pipe curtain steel pipe and the laser beam on the next pipe curtain steel pipe are respectively projected to the center of the two measuring plates; in this way, when the next pipe curtain steel pipe is pushed in, the offset of the pipe curtain steel pipe can be measured in real time at the same time, and the displacement change of the previous pipe curtain steel pipe that has been pushed in can be monitored in real time; Step 6, repeat the operation in step 5 until the last pipe curtain steel pipe is pushed in.

2. The real-time offset monitoring method of the spiral soil removal micro-pipe curtain top pipe according to claim 1 is characterized in that: The measuring auxiliary pipe is a steel pipe.

3. The real-time offset monitoring method of the spiral soil removal micro-pipe curtain top pipe according to claim 1 is characterized in that: The diameter of the measuring auxiliary tube is 4-8 cm.

4. The real-time offset monitoring method of the spiral soil removal micro-pipe curtain top pipe according to claim 1 is characterized in that: The front end of the measuring auxiliary tube is a conical head.

5. The real-time offset monitoring method of the spiral soil removal micro-pipe curtain top pipe according to claim 1 is characterized in that: The male lock buckle comprises two L-shaped steel plates bent outwardly, and the female lock buckle comprises two L-shaped steel plates bent inwardly.

6. The real-time offset monitoring method of the spiral soil removal micro-pipe curtain top pipe according to claim 1 is characterized by: In step 2, the posture of the pipe-curtain steel pipe is adjusted so that its position and slope meet the requirements, and a top ring washer is arranged between the jacking device of the pipe-curtain drilling rig and the pipe-curtain steel pipe.

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