CN113216990A - Starting and rapid slag discharging method in limited space of shield tunneling machine - Google Patents
Starting and rapid slag discharging method in limited space of shield tunneling machine Download PDFInfo
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- CN113216990A CN113216990A CN202110621412.7A CN202110621412A CN113216990A CN 113216990 A CN113216990 A CN 113216990A CN 202110621412 A CN202110621412 A CN 202110621412A CN 113216990 A CN113216990 A CN 113216990A
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- 230000005641 tunneling Effects 0.000 title claims abstract description 37
- 238000000034 method Methods 0.000 title claims abstract description 21
- 239000002893 slag Substances 0.000 title claims description 9
- 238000007599 discharging Methods 0.000 title claims description 5
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 98
- 239000010959 steel Substances 0.000 claims abstract description 98
- 238000010276 construction Methods 0.000 claims abstract description 21
- 238000004140 cleaning Methods 0.000 claims description 3
- 238000010079 rubber tapping Methods 0.000 claims 3
- 239000004035 construction material Substances 0.000 abstract description 4
- 238000009434 installation Methods 0.000 description 7
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Classifications
-
- 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
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
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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
- E21D11/04—Lining with building materials
- E21D11/08—Lining with building materials with preformed concrete slabs
-
- 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
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
- E21D9/0607—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining the shield being provided with devices for lining the tunnel, e.g. shuttering
-
- 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
- E21D9/12—Devices for removing or hauling away excavated material or spoil; Working or loading platforms
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Environmental & Geological Engineering (AREA)
- Architecture (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
A method for starting and rapidly deslagging in a limited space of a shield tunneling machine comprises the steps of a, mounting a shield starting counterforce device; b. installing a shield machine and starting tunneling; c. dismantling the shield starting counterforce device; d. arranging a track; through the steps, the horizontal steel pipe support of the shield starting counterforce device replaces the upper half negative ring duct piece, so that enough operation space can be provided for hoisting shield construction materials and muck when the shield is started in the limited space, the construction cost and the construction period are saved, a turnout is adopted to connect two tracks after the starting section, and two transport vehicles are used for orderly cross operation in the limited space, so that the horizontal transport efficiency of the muck is greatly improved at the initial stage of the shield, and the construction cost and the construction period are saved.
Description
Technical Field
The invention belongs to the technical field of shield tunnel construction, and particularly relates to a method for starting and rapidly deslagging in a limited space of a shield machine.
Background
At present, a shield construction method has a leading position in the field of tunnel construction such as subway tunnels, water supply guiding tunnels, electric power tunnels and the like, and is widely applied. However, due to the restriction of actual construction conditions, the plane size of some shield starting working wells is small, slag needs to be discharged when the shield machine works, the shield machine is difficult to start if no enough space is available for discharging slag, and the transport efficiency of slag soil is increasingly low under the condition that the shield starting space is limited along with the extension of the shield tunneling distance, and the production capacity of the subsequent shield construction directly depends on slag discharge transport and whether materials are in place in time, so that the shield starting space is limited, the initial tunneling efficiency of the shield machine is very low, and the progress of the whole construction is seriously hindered.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides a starting and rapid deslagging method for a shield machine in a limited space, wherein a horizontal steel pipe support of a shield starting counterforce device replaces an upper half negative ring duct piece, so that enough working space can be provided for hoisting shield construction materials and muck during starting of the shield in the limited space, the construction cost and the construction period are saved, a turnout is adopted to connect two tracks after a starting section, and two transport vehicles are used for orderly cross operation in the limited space, so that the horizontal transport efficiency of the muck at the initial stage of the shield is greatly improved, and the construction cost and the construction period are saved.
A method for starting and rapidly deslagging in a limited space of a shield tunneling machine comprises the following construction steps:
a. mounting a shield starting counterforce device:
sequentially comprises the following steps: the method comprises the following steps of installing a starting base of the shield machine, installing a reaction frame, installing a front reference steel ring and a tail reference steel ring, installing a negative semi-ring segment and installing a horizontal steel pipe support, wherein the starting base of the shield machine is fixed on a starting well bottom plate, the reaction frame is fixed at the tail end of the starting base, an interval which is not more than the length of the starting base of the shield machine is arranged between the front reference steel ring and the tail reference steel ring to form an operation area, the negative semi-ring segment is arranged on the lower layer of the operation area, two ends of the negative semi-ring segment are respectively fixed on the lower semi-rings of the front reference steel ring and the tail reference steel ring, the horizontal steel pipe supports are arranged on the upper layer of the operation area, the front reference steel ring and the upper semi-rings of the tail reference steel ring are connected, and the top of the operation area is provided with an opening convenient to lift;
b. installing a shield tunneling machine and starting tunneling:
installing a shield machine on the shield starting counterforce device, calculating the shortest safe distance for the shield machine to tunnel when the shield machine uses the starting counterforce device, and starting the shield machine to tunnel;
c. dismantling a shield starting counterforce device:
after the shield tunneling machine digs to reach the shortest safe distance, the shield launching counterforce device is dismantled;
d. track arrangement:
the method comprises the steps of cleaning a site where a shield starting counterforce device is located, and then arranging a main track, a turnout, a first track and a second track in the site, wherein the first track and the second track are communicated with the main track through the turnout, and the main track is communicated with a slag discharging area of a shield machine.
In the present embodiment, in step a: the reaction frame is a rectangular frame, a top horizontal supporting piece is welded on the outer side of the top edge of the reaction frame, a bottom horizontal supporting piece is welded on the outer side of the bottom edge of the reaction frame, and an inclined supporting piece is welded on the outer side edge of the reaction frame; the top horizontal supporting piece, the bottom horizontal supporting piece and the steel cylinder with the inclined supporting piece are all H-shaped steel.
In the embodiment, the horizontal steel pipe support is a seamless steel pipe, and two ends of the horizontal steel pipe support are welded with a steel support bottom support which is fixedly connected with a front reference steel ring and a tail reference steel ring; the front reference steel ring and the tail reference steel ring are both circular rings.
In this embodiment, the steel wedge fixing parts for supporting are welded on two sides of the negative semi-ring segment, and the negative semi-ring segment is supported on the shield tunneling machine starting base together through the bottom of the negative semi-ring segment and the steel wedge fixing parts.
In this embodiment, in the step b: the shortest safe distance for tunneling of the shield tunneling machine is as follows: the number of the assembled duct pieces is determined according to the number of the assembled duct pieces, and the number of the assembled duct pieces needs to ensure that the stratum friction resistance provided by the assembled duct pieces is not less than the propelling force of the shield tunneling machine.
In this embodiment, in the d-th step: vertical I-steel and horizontal I-steel constitute support system stirrup, lay in support system stirrup top parallel first track, second track, place first transport vechicle and second transport vechicle respectively in first track and second track, through the switch will first track, second track with the main track is connected, forms complete switch and arranges.
In the embodiment, the horizontal I-beams in the starting working well are longitudinally spaced by 1.2m, and the vertical I-beams and the horizontal I-beams are both 20 a-shaped I-beams; the vertical height of the turnout erection in the tunnel is 0.45m, and the horizontal I-shaped steel is used for track slope change at a position 14m away from a tunnel door in the tunnel, wherein the gradient is not more than 3.7%; the first track and the second track are laid in parallel, and the horizontal distance is 1 m.
Compared with the prior art, the invention has the following beneficial effects:
the shield starting counterforce device adopts the semi-annular semi-ring duct piece, and the upper part of the semi-ring duct piece is supported by the horizontal steel pipe to provide enough supporting force, so that enough operation space can be provided for hoisting shield construction materials and muck in the limited space. After the shield starting counterforce device is dismantled, the whole length of the transport vehicle for transporting the muck is limited by the limited space, so that the transport vehicle is shortened by reducing the hopper of each transport vehicle, the reduction of the conveying force caused by the reduction of the hopper of a single transport vehicle is compensated by improving the number of the transport vehicles, and the two transport vehicles can carry out orderly cross operation by arranging the turnout, thereby greatly improving the horizontal transport efficiency of the muck at the initial stage of the shield and saving the construction cost and the construction period.
In conclusion, the arrangement of the horizontal steel pipe support and the negative semi-ring segment ensures the counterforce support required by the tail part of the shield machine in the forward propelling process, and can also provide enough operation space for the hoisting of construction materials and muck of the shield machine in a limited space; the arrangement of the turnout enables the two transport vehicles to carry out orderly cross operation, and the horizontal transport efficiency of the muck is improved. The method can ensure that the shield can be safely and efficiently tunneled in a limited space better, saves the construction cost and the construction period, and accords with the concept of energy conservation and environmental protection.
Drawings
FIG. 1 is a side view of the overall structure of a shield launching reaction device according to the present invention;
FIG. 2 is a cross-sectional view of the horizontal steel pipe support and the reference ring according to the present invention;
FIG. 3 is a top view of the horizontal steel tube support arrangement of the present invention;
FIG. 4 is a top view of the track assembly of the present invention;
FIG. 5 is a cross-sectional view of the present invention at a track location within a tunnel;
fig. 6 is a side view of the overall structure of the track of the present invention.
Reference numerals: 1. a negative full-circle segment; 2. a front reference steel ring; 3. supporting by a horizontal steel pipe; 4. a tail reference steel ring; 5. a top horizontal support; 6. a reaction frame; 7. a diagonal support member; 8. a bottom horizontal support; 9. an initial base of the shield machine; 10. a steel wedge fixing member; 11. a negative semi-ring segment; 12. horizontal I-steel; 13. vertical I-steel; 14. a first transport vehicle; 15. a second transport vehicle; 16. a first track; 17. a second track; 18. a turnout; 19. a main track; 20. forming a tunnel duct piece; 21. originating well transport plane.
Detailed Description
The invention will be further described with reference to the accompanying drawings and specific embodiments.
The invention discloses a method for starting and rapidly deslagging in a limited space of a shield machine, which comprises the following specific construction steps:
a. the shield starting counterforce device is installed, and the steps sequentially comprise: the method comprises the following steps of starting base installation, reaction frame installation, reference steel ring installation, negative semi-ring segment installation and horizontal steel pipe support installation.
As shown in fig. 1, the starting counterforce device of the invention comprises a negative full-ring pipe piece 1, a front reference steel ring 2, a tail reference steel ring 4, a horizontal steel pipe support 3 between the negative full-ring pipe piece and the front reference steel ring, and a negative half-ring pipe piece 11, wherein a starting base 9 of the shield tunneling machine is fixed on a starting well floor, and a counterforce frame 6 is fixed at the tail end of the starting base 9 of the shield tunneling machine. The horizontal steel pipe support 3 and the two ends of the negative semi-ring segment 11 are fixed on the front reference steel ring 2 and the tail reference steel ring 4, so that the starting counterforce device forms a whole.
The reaction frame 6 is a rectangular frame, a top horizontal supporting piece 5 is welded on the top edge of the reaction frame, a bottom horizontal supporting piece 8 is welded on the bottom edge of the reaction frame, an inclined supporting piece 7 is welded on the side edge of the reaction frame, and the supporting pieces are all steel cylinders made of H-shaped steel. The horizontal steel pipe support 3 is made of seamless steel pipes through phi 609mm steel pipe machining. The front reference steel ring 2 and the tail reference steel ring 4 are both circular rings, and the front reference steel ring 2 and the tail reference steel ring 4 are formed by assembling and welding an upper part and a lower part.
Referring to fig. 2, a steel wedge fixing piece 10 is further included between the shield tunneling machine starting base 9 and the negative half-ring segment 11, and the steel wedge fixing piece 10 is welded on two sides of the negative half-ring segment 11 through a pad plug. The two ends of the horizontal steel pipe support 3 are welded with steel support bottom supports, and the bottom supports are made of steel plates with the thickness of 20mm and are used for connecting the steel pipe support 3 and the reference steel ring.
Referring to fig. 3, the horizontal steel pipe supports 3 are arranged in parallel in a overlook mode and welded on the upper half ring of the reference steel ring, and the distance between the support planes of the two middle steel pipes is determined by shield materials and a slag discharge operation space.
b. Installing a shield tunneling machine and starting tunneling:
installing a shield machine on the shield starting counterforce device, calculating the shortest safe distance for the shield machine to tunnel when the shield machine uses the starting counterforce device, and starting the shield machine to tunnel;
c. dismantling a shield starting counterforce device:
after the shield tunneling machine digs to reach the shortest safe distance, the shield launching counterforce device is dismantled; the steps sequentially comprise: the method comprises the following steps of dismantling a steel pipe support 3, dismantling a negative semi-ring segment 11, dismantling a front reference steel ring 2 and a tail reference steel ring 4, dismantling a reaction frame 6 and dismantling an originating base 9. The shortest safe distance for tunneling of the shield tunneling machine is as follows: the number of the assembled duct pieces is determined according to the number of the assembled duct pieces, and the number of the assembled duct pieces needs to ensure that the stratum friction resistance provided by the assembled duct pieces is not less than the propelling force of the shield tunneling machine.
d. Performing a track layout, which comprises in sequence: cleaning field, stirrup installation and turnout installation.
As shown in fig. 4, the switch arrangement of the present invention includes a horizontal i-beam 12, a vertical i-beam 13, a first rail 16, a second rail 17, a main rail 19, and a switch 18. The vertical I-beam 13 and the horizontal I-beam 12 form a stirrup of a support system, the first track 16 and the second track 17 are laid above the stirrup in parallel, the transport vehicles 14 and 15 are respectively arranged on the two tracks, and the first track 16 and the second track 17 are connected with the main track 19 through the turnout 18, so that the turnout is arranged into a whole.
The vertical interval of the horizontal I-shaped steel 12 in the starting working well is 1.2m, the horizontal I-shaped steel 12 and the vertical I-shaped steel 13 are parallelly erected, a support system stirrup is formed by welding, and the I-shaped steel is 20 a-shaped I-shaped steel. The first rail 16 and the second rail 17 are laid in parallel, and the horizontal distance is 1 m.
Referring to fig. 5, the switches 18 are erected at the bottom of the formed segment by horizontal I-shaped steel 12, and the vertical height of the switches 18 erected in the tunnel is 0.45 m.
Referring to fig. 6, the horizontal i-beam 12 is used for track grade change from a position 14m away from the tunnel portal in the tunnel, with a slope of 3.7%, so that the height difference between the originating well transportation plane 21 and the bottom of the tunnel forming segment 20 is 0.45 m.
The above examples are merely illustrative for clearly illustrating the present invention and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. Nor is it intended to be exhaustive of all embodiments. And obvious variations or modifications of the invention may be made without departing from the scope of the invention.
Claims (7)
1. A method for starting and rapidly deslagging in a limited space of a shield tunneling machine is characterized by comprising the following construction steps:
a. mounting a shield starting counterforce device:
sequentially comprises the following steps: the method comprises the following steps of installing a starting base of the shield machine, installing a reaction frame, installing a front reference steel ring and a tail reference steel ring, installing a negative semi-ring segment and installing a horizontal steel pipe support, wherein the starting base of the shield machine is fixed on a starting well bottom plate, the reaction frame is fixed at the tail end of the starting base, an interval which is not more than the length of the starting base of the shield machine is arranged between the front reference steel ring and the tail reference steel ring to form an operation area, the negative semi-ring segment is arranged on the lower layer of the operation area, two ends of the negative semi-ring segment are respectively fixed on the lower semi-rings of the front reference steel ring and the tail reference steel ring, the horizontal steel pipe supports are arranged on the upper layer of the operation area, the front reference steel ring and the upper semi-rings of the tail reference steel ring are connected, and the top of the operation area is provided with an opening convenient to lift;
b. installing a shield tunneling machine and starting tunneling:
installing a shield machine on the shield starting counterforce device, calculating the shortest safe distance for the shield machine to tunnel when the shield machine uses the starting counterforce device, and starting the shield machine to tunnel;
c. dismantling a shield starting counterforce device:
after the shield tunneling machine digs to reach the shortest safe distance, the shield launching counterforce device is dismantled;
d. track arrangement:
cleaning an originating working well where a shield originating counterforce device is located, and then laying a main track, a turnout, a first track and a second track in the field, wherein the first track and the second track are communicated with the main track through the turnout, and the main track is communicated with a slag discharging area of a shield machine.
2. The method for starting and rapidly tapping in the limited space of the shield tunneling machine according to claim 1, wherein in the step a: the reaction frame (6) is a rectangular frame, a top horizontal supporting piece (5) is welded on the outer side of the top edge of the reaction frame (6), a bottom horizontal supporting piece (8) is welded on the outer side of the bottom edge of the reaction frame, and an inclined supporting piece (7) is welded on the outer side of the reaction frame; the top horizontal supporting piece (5), the bottom horizontal supporting piece (8) and the inclined supporting piece (7) are all H-shaped steel cylinders.
3. The starting and rapid deslagging method in the limited space of the shield tunneling machine according to claim 2, characterized in that: the horizontal steel pipe support (3) is a seamless steel pipe, and two ends of the horizontal steel pipe support (3) are welded with a steel support bottom support which is fixedly connected with a front reference steel ring (2) and a tail reference steel ring (4); the front reference steel ring (2) and the tail reference steel ring (4) are both circular rings.
4. The starting and rapid deslagging method in the limited space of the shield tunneling machine according to claim 2, characterized in that: the steel wedge fixing pieces (10) used for supporting are welded on two sides of the negative semi-ring duct piece (11), and the negative semi-ring duct piece (11) is supported on the shield tunneling machine starting base (9) together with the steel wedge fixing pieces (10) through the bottom of the negative semi-ring duct piece.
5. The method for starting and rapidly tapping in the limited space of the shield tunneling machine according to claim 1, wherein in the step b: the shortest safe distance for tunneling of the shield tunneling machine is as follows: the number of the assembled duct pieces is determined according to the number of the assembled duct pieces, and the number of the assembled duct pieces needs to ensure that the stratum friction resistance provided by the assembled duct pieces is not less than the propelling force of the shield tunneling machine.
6. The method for starting and rapidly tapping in the limited space of the shield tunneling machine according to claim 1, wherein in the d step: vertical I-steel (13) and horizontal I-steel (12) constitute support system stirrup, lay in support system stirrup top parallel first track (16), second track (17), place first transport vechicle and second transport vechicle respectively in first track (16) and second track (17), through switch (18) will first track (16), second track (17) with main track (19) are connected, form complete switch and arrange.
7. The starting and rapid deslagging method in the limited space of the shield tunneling machine according to claim 6, characterized in that: the horizontal I-beams in the originating working well are longitudinally spaced by 1.2m, and the vertical I-beam (13) and the horizontal I-beam (12) are both 20 a-shaped I-beams; the vertical height of the turnout erection in the tunnel is 0.45m, and the horizontal I-shaped steel is used for track slope change at a position 14m away from a tunnel door in the tunnel, wherein the gradient is not more than 3.7%; the first track and the second track are laid in parallel, and the horizontal distance is 1 m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110621412.7A CN113216990A (en) | 2021-06-03 | 2021-06-03 | Starting and rapid slag discharging method in limited space of shield tunneling machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110621412.7A CN113216990A (en) | 2021-06-03 | 2021-06-03 | Starting and rapid slag discharging method in limited space of shield tunneling machine |
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|---|---|
| CN113216990A true CN113216990A (en) | 2021-08-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110621412.7A Pending CN113216990A (en) | 2021-06-03 | 2021-06-03 | Starting and rapid slag discharging method in limited space of shield tunneling machine |
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| CN (1) | CN113216990A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114151093A (en) * | 2021-11-12 | 2022-03-08 | 中铁隧道局集团有限公司 | Construction method for continuously pushing shield through vertical shaft in air and carrying out secondary starting |
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| CN114151093A (en) * | 2021-11-12 | 2022-03-08 | 中铁隧道局集团有限公司 | Construction method for continuously pushing shield through vertical shaft in air and carrying out secondary starting |
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