CN109281688B - Tunnel advanced pipe shed accurate positioning system and construction method - Google Patents
Tunnel advanced pipe shed accurate positioning system and construction method Download PDFInfo
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- CN109281688B CN109281688B CN201811318645.4A CN201811318645A CN109281688B CN 109281688 B CN109281688 B CN 109281688B CN 201811318645 A CN201811318645 A CN 201811318645A CN 109281688 B CN109281688 B CN 109281688B
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- 238000010276 construction Methods 0.000 title claims abstract description 21
- 238000005553 drilling Methods 0.000 claims abstract description 43
- 238000000034 method Methods 0.000 claims abstract description 17
- 230000000149 penetrating effect Effects 0.000 claims abstract description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 35
- 239000010959 steel Substances 0.000 claims description 35
- 239000000523 sample Substances 0.000 claims description 18
- 230000003014 reinforcing effect Effects 0.000 claims description 9
- 230000003044 adaptive effect Effects 0.000 claims description 3
- 230000002787 reinforcement Effects 0.000 claims description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000006073 displacement reaction Methods 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000009412 basement excavation Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/003—Linings or provisions thereon, specially adapted for traffic tunnels, e.g. with built-in cleaning devices
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/10—Wear protectors; Centralising devices, e.g. stabilisers
- E21B17/1078—Stabilisers or centralisers for casing, tubing or drill pipes
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/04—Directional drilling
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Environmental & Geological Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Civil Engineering (AREA)
- Architecture (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Geophysics (AREA)
- Earth Drilling (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
An accurate positioning system for a tunnel forepoling comprises a guide wall, a guide pipe and a supporting piece, wherein the outer end part of the guide pipe extends out of the guide wall and is detachably connected with a group of laser positioning pieces; a drilling device is arranged in the guide pipe in a penetrating way; the laser positioning piece comprises at least two positioning plates which are arranged in parallel at intervals; the positioning plate is provided with a round hole; the connecting line between the circular holes corresponds to the central line of the guide pipe; the drilling device comprises a drill bit and a drill rod with a limiting piece; the construction method of the positioning system is based on the fact that a laser range finder positions the drilling distance through a positioning plate round hole, space limiting is conducted according to a limiting piece on a drill rod, deviation rectification adjustment is conducted through a guide drill bit, and therefore the advanced pipe shed is accurately positioned in a combined mode. The invention is beneficial to the accurate control of the drilling angle; and the space displacement in the drilling process is limited, the positioning member is easy to manufacture, the use is convenient, the implementation of the positioning method is simple and controllable, the working hours can be effectively saved, and the construction quality is improved.
Description
Technical Field
The invention belongs to the field of tunnel construction, and particularly relates to a precise positioning system and a construction method for a tunnel advanced pipe shed.
Background
Along with continuous extension of underground engineering and tunnel engineering to areas such as river valleys, foot footings, step areas and the like, the geological conditions faced by construction are more and more complex and changeable, wherein layered excavation through existing buildings and tunnels needs supporting and reinforcing, and advanced pipe shed supporting is a commonly used reinforcing method in tunnel engineering. The advanced pipe shed support is one of auxiliary measures which are adopted in advance of excavation of a working face and ensure that the excavation working face of tunnel engineering is stable, but for an underground tunnel or a lower-layer tunnel, the problem that the pipe shed penetrates through an upper-layer building (structure) or influences the advanced support effect is caused due to the fact that a drilling angle is too large in the construction process of the advanced pipe shed, the traditional advanced pipe shed of the tunnel at present only adopts a guide frame consisting of 3H-shaped steels at a hole, guide pipes are buried in the guide frame, guide walls are poured with concrete, then the pipe shed is directly drilled and installed, effective accurate positioning measures are lacked before the construction of the pipe shed, and measures for controlling the torsion deviation of drill rods are lacked in the construction process. Therefore, it is necessary to provide an accurate positioning system and a construction method for the pipe advance shed.
Disclosure of Invention
The invention provides a tunnel advanced pipe shed accurate positioning system and a construction method, which are used for solving the problems and have the following specific technical scheme:
an accurate positioning system for a tunnel forepoling comprises a guide wall on the outer side of a tunnel supporting surface, and a guide pipe and a support piece which are arranged in the guide wall and correspond to a tunnel shed, wherein the outer end part of the guide pipe extends out of the guide wall, and the extending end of the guide pipe is detachably connected with a group of laser positioning pieces; a drilling device is arranged in the guide pipe in a penetrating way; the supporting pieces are positioned at the lower part of the outer side wall of the guide pipe and are arranged in parallel at intervals along the length direction of the guide pipe.
The laser positioning piece comprises at least two positioning plates which are arranged in parallel at intervals; the positioning plate is provided with a round hole; the connecting line between the circular holes corresponds to the central line of the guide pipe; the positioning plate is square, round or polygonal; the laser positioning piece is connected with the extending end of the guide pipe through a connecting piece.
The connecting piece is a sleeve, and the laser positioning pieces are connected to the bottom of the inner side of the sleeve at intervals; or the connecting piece is a strip with a clamping hook at the end part, the clamping hook is connected to the outer end part of the extending end of the guide pipe, and the laser positioning pieces are connected to the strip at intervals.
A transverse reinforcing rod and/or a longitudinal reinforcing rod are connected between the supporting pieces; the supporting piece is I-shaped steel, H-shaped steel, channel steel or a steel pipe; the reinforcing rod is a steel bar or a steel pipe.
The drilling device comprises a drill bit and a drill rod with a limiting part.
The limiting pieces are arranged on the outer side surface of the drill rod in at least two groups at intervals in parallel, each group comprises at least two rectangular plates and is uniformly arranged at intervals along the drill rod in an annular mode, and the height of each rectangular plate is suitable for the length from the wall of a hole formed in the pipe shed to the drill rod; the outer side edge of the rectangular plate is an arc-shaped edge, and the radian of the arc-shaped edge is adaptive to the hole wall.
The limiting pieces are annular band plates which are longitudinally arranged along the outer side surface of the drill rod at intervals; the width of the annular band plate is suitable for the length from the wall of the supporting hole of the pipe shed to the drill rod.
The construction method of the tunnel advanced pipe shed accurate positioning system comprises the following specific steps:
step one, mounting a support piece, a transverse reinforcement piece, a longitudinal reinforcement piece and a guide pipe based on a pipe shed erecting angle, and then erecting a pouring template;
step two, pouring a guide wall, and measuring and setting a positioning guide pipe in the pouring process;
inserting a drill bit in the guide pipe to ensure that the outer limiting part of the drill rod is attached to the hole wall, and drilling the pipe hole of the pipe shed;
taking out the drilling device, mounting a laser positioning piece at the extending end part of the guide pipe, and using a laser range finder to enable laser to pass through a round hole in the laser positioning piece so as to measure the drilling distance;
comparing the measured distance with the designed distance, and if the measured distance does not meet the requirement of the deviation amount, calculating the error amount and the angle according to the measured distance and the designed distance to correct the deviation; if the measured distance is in accordance with the designed distance or within the error allowable range, the laser positioning piece is disassembled, and drilling is continued;
and step six, repeating the step three to the step five until the support hole of the pipe shed is drilled.
According to the construction method of the tunnel advancing pipe shed accurate positioning system, when drilling deviation correction is conducted, a guide drill bit and a drill rod with a probe rod arranged inside a rod body penetrate through the guide pipe in the third step, and the drill rod is adjusted according to the drilling angle of the drill bit on the instrument display.
The front end of the pilot bit is provided with a square guide plate, the angle between the guide plate and the pilot bit is adapted to the deviation angle of the drilling process, the probe is connected with an instrument display, the horizontal angle of the pilot bit is measured, and the angle change of the pilot bit during drilling is displayed in time.
The invention has the following beneficial effects:
the outer end part of the guide pipe extends out of the guide wall to be processed, so that the guide pipe is convenient to connect with a laser positioning piece, and the arrangement of the round hole on the positioning piece ensures the accuracy in laser positioning, further determines the drilling distance of a drilled hole and effectively evaluates the deviation of the positioning drilling distance; the limiting piece is additionally arranged on the drill rod, so that the spatial shaking of the drill rod in the drilling process of a drill hole can be effectively controlled, the deflection of a drill bit is reduced, and the accurate control of the drilling angle is facilitated; in the positioning system, multiple measures such as a limiting part, laser ranging and a guide plate are utilized to limit the spatial displacement in the drilling process, determine the length distance, correct the deviation of the deflection generated in the drilling process and the like in the construction process, and further, the positioning of the advanced pipe shed of the tunnel is more accurate and controllable. The positioning member is easy to manufacture and convenient to use, and the positioning method is simple and controllable to implement, so that the working hours can be effectively saved, and the construction quality is improved.
Drawings
FIG. 1 is a schematic diagram of a tunnel forepoling support;
FIG. 2 is a schematic diagram of precise positioning and connection of a tunnel advance pipe shed;
FIG. 3 is a schematic view of laser positioning member installation;
FIG. 4 is a side view of the laser spacer connection;
FIG. 5 is a schematic view of the connection between the drill bit and the rod body with the position limiting member;
FIG. 6 is a cross-sectional view of a stopper rod body;
FIG. 7 is a schematic view of a pilot bit and drill rod connection.
Reference numerals: 1-pipe shed; 2-a support; 3-a guide wall; 4-a guide tube; 5-a drill rod; 6-a limiting part; 7-pore wall; 8-a drill bit; 9-extension end; 10-a connector; 11-a steel wire rope; 12-a signal line; 13-a guide plate; 14-a motor; 15-instrument display; 16-a probe; 17-a pilot bit; 18-a laser locator; 19-positioning plate; 20-round hole.
Detailed Description
As shown in fig. 1 and 2, an accurate location system of leading pipe shed in tunnel contains the inside stand pipe 4 and the support piece 2 that corresponds the setting of pipe shed 1 of arch guide wall 3 and the guide wall 3 outside the tunnel chaplet face, its characterized in that: the outer end part of the guide pipe 4 extends out of the guide wall 3, and the extending end 9 of the guide pipe 4 is detachably connected with a group of laser positioning pieces 18; a drilling device is arranged in the guide pipe 4 in a penetrating way; the supporting pieces 2 are positioned at the lower part of the outer side wall of the guide pipe 4 and are arranged in parallel at intervals along the length direction of the guide pipe 4.
In this embodiment, the length of the guide wall 3 is 3m, and the support members 2 are I-shaped steel I18 at a distance of 60 cm/pin. The guide pipe 4 is installed along the top of the outer side of the I-steel, the guide pipe 4 and the I-steel are fixed in a welding mode, the I-steel is fixed through the transverse reinforcing rods, the transverse connecting rods are made of forged steel bars, and therefore the guide pipe 4 is prevented from deviating in the concrete pouring process of the guide wall 3.
As shown in fig. 3 and 4, the extending end 9 of the guide tube 4 is sleeved with the extending end 9 of the guide tube 4 by using sleeve threads, wherein the laser positioning members 18 are three parallel rectangular steel plates with round holes 20, the rectangular steel plates are used as positioning plates 19, the rectangular steel plates are welded on the bottom surface of the inner side of the sleeve and are respectively positioned at the front part, the middle part and the tail part of the sleeve, and the connecting line between the round holes 20 corresponds to the central line of the guide tube 4.
The connecting piece 10 can also be a rigid strip with a clamping hook, wherein the laser positioning pieces 18 are three parallel rectangular steel plates with round holes 20, the rectangular steel plates are vertically welded on the outer side surface of the steel strip at intervals, and the connecting line between the round holes 20 corresponds to the central line of the guide pipe 4; during the application, arrange the steel strip in inside the stand pipe 4, round hole 20 aligns 4 central lines of stand pipe to connect in the tip of stand pipe 4 with the trip of steel strip tip.
As shown in fig. 5 and 6, the drilling device is a drill bit 8 and a drill rod 5 with a limiting piece 6; the limiting pieces 6 are welded with the drill rod 5 to the outer side in the length direction at intervals of 1m, the limiting pieces 6 are four steel plates of 5cm multiplied by 2cm, and the steel plates are uniformly distributed on the annular direction of the drill rod 5 at intervals; the height of the steel plate is adapted to the length from the wall 7 of the hole erected on the pipe shed 1 to the drill rod 5; the outer side of the steel plate is an arc-shaped side, and the radian of the arc-shaped side is adaptive to the hole wall 7.
In addition, the limiting member 6 may also be an annular band plate longitudinally arranged along the outer side surface of the drill rod 5 at intervals; the width of the annular band plate is suitable for the length from the hole wall 7 erected on the pipe shed 1 to the drill rod 5.
With reference to fig. 1 to 6, a construction method of a tunnel advanced pipe shed precise positioning system is further described, which comprises the following specific steps:
step one, installing an I-shaped steel beam, a transverse steel bar and a guide pipe 4 based on the erecting angle of the pipe shed 1, and then erecting a pouring template.
And step two, pouring the guide wall 3, and measuring and setting the positioning guide pipe 4 in the pouring process.
And thirdly, inserting a drill bit 8 into the guide pipe 4 to ensure that the outer limiting part 6 of the drill rod 5 is attached to the hole wall 7, and drilling the hole of the pipe shed 1.
And step four, taking out the drilling device, installing a laser positioning piece 18 at the extending end part of the guide pipe, and using a laser range finder to enable laser to pass through a round hole 20 in the laser positioning piece 18 so as to measure the drilling distance.
Comparing the measured distance with the designed distance, and if the measured distance does not meet the requirement of the deviation amount, calculating the error amount and the angle according to the measured distance and the designed distance to correct the deviation; if the measured distance is in accordance with the designed distance or within the allowable error range, the laser positioning piece 18 is disassembled, and the drilling is continued.
And step six, repeating the step three to the step five until the support hole of the pipe shed is drilled.
And when drilling deviation correction is carried out, a guide drill bit 17 and a drill rod 5 with a probe 16 arranged inside the rod body are arranged in the guide pipe 4 in the third step in a penetrating mode, and the adjustment is carried out according to the drilling angle of the guide drill bit 17 on the instrument display 15.
Referring to fig. 7, a probe 16 is arranged in a pilot bit 17, and the probe 16 is designed and manufactured by a gravity strain gauge and is powered by 4 batteries; the probe 16 is formed by hermetically processing a gravity strain gauge into a probe 16 by adopting a closed hollow rod-shaped body; the probe 16 is firmly fixed by a fixing device at one side and the middle part of the probe 16 close to the front end of the guide drill bit 17, so that the probe 16 is prevented from displacing during construction; and ensures that the axis of the probe 16 is in the same direction as the axis of the pilot bit 17; meanwhile, a signal wire 12 and a steel wire rope 11 extend out of the tail end of the probe 16, and the steel wire rope 11 is connected with a motor 14 and used as a recovery probe 16; the end of the signal line 12 is connected to a meter display 15, which displays the inclination (horizontal angle) and the face angle (direction of the guide plate 13: twelve points are shown as a clock face with the guide plate 13 facing upward) of the pilot bit 17.
In this embodiment, a square guide plate 13 is arranged at the front end of the pilot bit 17, the angle between the guide plate 13 and the pilot bit 17 is adapted to the deviation angle of the drilling process, the probe 16 is connected with the instrument display 15, the horizontal angle of the pilot bit 17 is measured, and the angle change of the pilot bit 17 during drilling is displayed in time.
In the embodiment, a guide drill bit 17 and a drill rod 5 with a probe 16 arranged inside a rod body are arranged in the guide pipe 4 in the third step in a penetrating manner, and the adjustment is carried out according to the drilling angle of the guide drill bit 17 on the instrument display 15; when the pilot bit 17 is used for correcting deviation, if the driving angle is set to be lower, the pilot bit 17 is adjusted to six points, namely the guide plate 13 faces downwards and is directly jacked, and at the moment, because the inclined surface area of the bottom surface of the guide plate 13 is large, an upward force is applied, the track of the pilot bit 17 moves upwards; similarly, the twelve-point deviation correction can make the guide drill 17 track face downwards, and the nine points and the three points are respectively in the right deviation correction direction and the left deviation correction direction.
It is to be understood that the foregoing examples are illustrative only for the purpose of clearly illustrating the salient features of the present invention, and are not to be construed as limiting the embodiments of the present invention; it will be apparent to those skilled in the art that other variations and modifications may be made in the foregoing disclosure without the use of inventive changes thereto, all falling within the scope of the present invention.
Claims (10)
1. The utility model provides an accurate location system of leading pipe canopy in tunnel, contains the inside stand pipe (4) and the support piece (2) that correspond pipe canopy (1) and set up of guide wall (3) and guide wall (3) in the tunnel chaplet face outside, its characterized in that: the outer end part of the guide pipe (4) extends out of the guide wall (3), and the extending end (9) of the guide pipe (4) is detachably connected with a group of laser positioning pieces (18); a drilling device is arranged in the guide pipe (4) in a penetrating way; the supporting pieces (2) are positioned at the lower part of the outer side wall of the guide pipe (4) and are arranged in parallel at intervals along the length direction of the guide pipe (4);
the laser positioning piece (18) comprises at least two positioning plates (19) which are arranged in parallel at intervals; round holes (20) are formed in the positioning plate (19), and the connecting line among the round holes (20) corresponds to the central line of the guide pipe (4); the laser positioning piece (18) is connected with the extending end (9) of the guide tube (4) through a connecting piece (10).
2. The accurate positioning system for the tunnel advance pipe shed according to claim 1, characterized in that: the positioning plate (19) is square, circular or polygonal.
3. The accurate positioning system for the tunnel advance pipe shed according to claim 2, characterized in that: the connecting piece (10) is a sleeve, and the laser positioning pieces (18) are connected to the bottom of the inner side of the sleeve at intervals; or the connecting piece (10) is a strip with a clamping hook at the end part, the clamping hook is connected to the outer end part of the extending end (9) of the guide pipe (4), and the laser positioning pieces (18) are connected to the strip at intervals.
4. The accurate positioning system for the tunnel advance pipe shed according to claim 1, characterized in that: a transverse reinforcing rod and/or a longitudinal reinforcing rod are connected between the supporting pieces (2); the supporting piece (2) is I-shaped steel, H-shaped steel, channel steel or a steel pipe; the reinforcing rod is a steel bar or a steel pipe.
5. The accurate positioning system for the tunnel advance pipe shed according to claim 1, characterized in that: the drilling device comprises a drill bit (8) and a drill rod (5) with a limiting piece (6).
6. The accurate positioning system for the tunnel advance pipe shed according to claim 5, characterized in that: the limiting pieces (6) are arranged on the outer side surface of the drill rod (5) in at least two groups at intervals in parallel, each group comprises at least two rectangular plates and is annularly and uniformly arranged along the drill rod (5) at intervals, and the height of each rectangular plate is suitable for the length from a hole wall (7) of the support hole of the pipe shed (1) to the drill rod (5); the outer side edge of the rectangular plate is an arc-shaped edge, and the radian of the arc-shaped edge is adaptive to the hole wall (7).
7. The accurate positioning system for the tunnel advance pipe shed according to claim 6, characterized in that: the limiting pieces (6) are annular band plates which are longitudinally arranged along the outer side surface of the drill rod (5) at intervals; the width of the annular band plate is suitable for the length from the wall (7) of the hole erected on the pipe shed (1) to the drill rod (5).
8. The construction method of the precise positioning system for the tunnel advancing pipe shed according to claim 7 is characterized by comprising the following specific steps:
firstly, installing a support piece (2), a transverse and longitudinal reinforcement piece and a guide pipe (4) based on the supporting angle of a pipe shed (1), and then erecting a pouring template;
step two, pouring a guide wall (3), and measuring and setting a positioning guide pipe (4) in the pouring process;
inserting a drill bit (8) into the guide pipe (4) to ensure that an outer limiting part (6) of the drill rod (5) is attached to the hole wall (7), and drilling the hole of the pipe shed (1);
taking out the drilling device, mounting a laser positioning piece (18) at the extending end part of the guide pipe, and using a laser range finder to enable laser to pass through a round hole (20) in the laser positioning piece (18) so as to measure the drilling distance;
comparing the measured distance with the designed distance, and if the measured distance does not meet the requirement of the deviation amount, calculating the error amount and the angle according to the measured distance and the designed distance to correct the deviation; if the measured distance is in accordance with the designed distance or within the allowable error range, the laser positioning piece (18) is disassembled, and drilling is continued;
and step six, repeating the step three to the step five until the support holes of the pipe shed (1) are drilled.
9. The construction method of the precise positioning system for the tunnel advance pipe shed according to claim 8, characterized in that: and when drilling deviation correction is carried out, a guide drill bit (17) and a drill rod (5) with a probe (16) arranged inside the rod body penetrate through the guide pipe (4) in the third step, and the adjustment is carried out according to the drilling angle of the guide drill bit (17) on the instrument display (15).
10. The construction method of the precise positioning system for the tunnel advance pipe shed according to claim 9, characterized in that: the front end of the guide drill bit (17) is provided with a square guide plate (13), the angle between the guide plate (13) and the guide drill bit (17) is adapted to the deviation angle of the drilling process, the probe (16) is connected with an instrument display (15), the horizontal angle of the guide drill bit (17) is measured, and the angle change of the guide drill bit (17) during drilling is displayed in time.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811318645.4A CN109281688B (en) | 2018-11-07 | 2018-11-07 | Tunnel advanced pipe shed accurate positioning system and construction method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811318645.4A CN109281688B (en) | 2018-11-07 | 2018-11-07 | Tunnel advanced pipe shed accurate positioning system and construction method |
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| CN109281688A CN109281688A (en) | 2019-01-29 |
| CN109281688B true CN109281688B (en) | 2020-04-28 |
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| CN110159308B (en) * | 2019-05-27 | 2022-03-15 | 中国五冶集团有限公司 | Method for positioning long pipe shed of tunnel |
| CN113153340A (en) * | 2021-04-29 | 2021-07-23 | 福建省亿方建设工程有限公司 | Down-through tunnel pilot tunnel construction method |
| CN114658449A (en) * | 2022-04-29 | 2022-06-24 | 中国一冶集团有限公司 | Tunnel underground excavation pipe shed guide pipe drilling construction precision control method |
| CN114961748B (en) * | 2022-06-23 | 2023-03-10 | 中铁九局集团第三建设有限公司 | Construction method of large pipe shed guide wall at tunnel opening of shallow tunnel |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN204082167U (en) * | 2014-09-12 | 2015-01-07 | 中铁建大桥工程局集团第二工程有限公司 | The auxiliary locator of super-front large pipe shed in a kind of Tunnel |
| CN105298517A (en) * | 2015-11-21 | 2016-02-03 | 中铁二十局集团第二工程有限公司 | Soft and weak wall rock tunnel advance reinforced support construction method |
| CN205642374U (en) * | 2016-03-31 | 2016-10-12 | 嘉善睿逸电子科技有限公司 | Laser positioner |
| CN106837357B (en) * | 2017-03-24 | 2019-07-12 | 山东大学 | A kind of no-dig technique pipe-roof method using curve pipe canopy |
| CN106988755A (en) * | 2017-05-10 | 2017-07-28 | 中铁五局集团第五工程有限责任公司 | A kind of tunnel portal weak surrounding rock section overlength pipe shed construction method |
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