CN109306870B - Steel arch frame for whole support of tunnel full-section construction and support method - Google Patents
Steel arch frame for whole support of tunnel full-section construction and support method Download PDFInfo
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- CN109306870B CN109306870B CN201811257159.6A CN201811257159A CN109306870B CN 109306870 B CN109306870 B CN 109306870B CN 201811257159 A CN201811257159 A CN 201811257159A CN 109306870 B CN109306870 B CN 109306870B
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- flange plate
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- frame
- arch frame
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 94
- 239000010959 steel Substances 0.000 title claims abstract description 94
- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000010276 construction Methods 0.000 title claims abstract description 26
- 230000007246 mechanism Effects 0.000 claims abstract description 38
- 230000009471 action Effects 0.000 claims abstract description 12
- 230000005484 gravity Effects 0.000 claims abstract description 12
- 238000005553 drilling Methods 0.000 claims description 25
- 210000000078 claw Anatomy 0.000 claims description 21
- 238000003466 welding Methods 0.000 claims description 19
- 238000009434 installation Methods 0.000 abstract description 9
- 239000011435 rock Substances 0.000 abstract description 8
- 101150097977 arch-1 gene Proteins 0.000 description 25
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000004873 anchoring Methods 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
Classifications
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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
- E21D11/14—Lining predominantly with metal
- E21D11/18—Arch members ; Network made of arch members ; Ring elements; Polygon elements; Polygon elements inside arches
-
- 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
- E21D11/14—Lining predominantly with metal
- E21D11/18—Arch members ; Network made of arch members ; Ring elements; Polygon elements; Polygon elements inside arches
- E21D11/22—Clamps or other yieldable means for interconnecting adjacent arch members either rigidly, or allowing arch member parts to slide when subjected to excessive pressure
-
- 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
- E21D11/14—Lining predominantly with metal
- E21D11/30—Bases for lower arch members
-
- 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
- E21D11/40—Devices or apparatus specially adapted for handling or placing units of linings or supporting units for tunnels or galleries
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention belongs to the technical field of steel arches and supporting methods, and discloses a steel arch for whole supporting of full-section construction of a tunnel and a supporting method. The main technical characteristics are as follows: the connecting plate comprises a first flange plate and a second flange plate, one sides of the first flange plate and the second flange plate are movably connected through a connecting mechanism, and connecting bolts are arranged in connecting holes. In the process of storage and transportation, the steel arches connected through the connecting disc are folded together, when the steel arches are transported to a supporting position, the steel arches are lifted from the middle part of the upper arch by a lifting machine, the middle arch and the lower arch sag under the action of self gravity, at the moment, the connecting holes of the first flange plate and the second flange plate are automatically aligned under the limit of the connecting mechanism, the operation time of workers at the supporting position is shortened, the accident occurrence rate caused by falling rocks or collapse is reduced, the installation efficiency is improved, and the labor intensity is reduced.
Description
Technical Field
The invention belongs to the technical field of tunnel supporting steel arches and supporting methods, and particularly relates to a steel arch for whole supporting of tunnel full-section construction and a supporting method.
Background
At present, a composite lining structure is often adopted in domestic tunnel engineering, a tunnel steel arch frame is a component part of primary support of a tunnel, and the primary convergence deformation of surrounding rock caused by excavation disturbance is mainly resisted. Under the general condition, the steel arch is transported to a construction site in a slicing way, the steel arch is manually installed on the excavated tunnel face by workers, the steel arch is fixed by adopting a foot locking anchor pipe at the arch foot of the steel arch, and U-shaped steel bar welding is adopted between the steel arch and the foot locking anchor pipe. The above method has the following defects: firstly, the steel arch frame is manually transported to the excavated face for installation, the installation space is small, the installation difficulty is high, and the accident occurrence rate is increased because the face is easy to fall stones and the like; secondly, the segments are connected by adopting flange plates, each steel arch frame weighs hundreds of kilograms, and the steel arch frames are not easy to align in a narrow space, so that the labor intensity is increased; thirdly, due to the influence of narrow operation space, the steel arch frame installed each time can weigh hundreds of kilograms, and is difficult to lift to be closely attached to the surrounding rock of the tunnel vault only by manpower, and a larger gap exists between the surrounding rock of the vault and the top edge of the steel arch frame; when concrete is sprayed again after the steel arch is erected, the arch part is partially hollow. In this case, the steel arch will not be able to act against the convergence and deformation of the arch surrounding rock within a certain deformation range.
Disclosure of Invention
The first technical problem to be solved by the invention is to provide the steel arch for the whole support of the full section construction of the tunnel, which has good welding quality and high production efficiency.
In order to solve the problems, the invention adopts the following technical scheme: including being located the upper arch at middle part, being located two middle arches at upper arch both ends with be located the lower arch at middle arch both ends go up the arch with between the middle arch and be in between middle arch with set up the connection pad down between the arch, go up the tip and the connection pad fixed connection that correspond of arch, middle arch and lower arch, the connection pad includes first ring flange and second ring flange, first ring flange and second ring flange one side are through coupling mechanism swing joint be provided with the connecting hole on first ring flange and the second ring flange be provided with connecting bolt in the connecting hole.
The additional technical characteristics are as follows:
the connecting mechanism is a winch shaft connected with the first flange plate and the second flange plate;
An anchor rod positioning frame is arranged on the connecting disc, and an anchor rod guide sleeve is arranged on the anchor rod positioning frame;
The anchor rod positioning frame is provided with a fixing hole matched with the connecting hole in position, and is fixedly connected with the first flange plate and the second flange plate through connecting bolts;
the lower ends of the two lower arches are provided with jacking connecting discs, each jacking connecting disc comprises a bottom surface supporting plate fixedly connected with the bottom of each lower arch, two sides of each bottom surface supporting plate are provided with side surface supporting plates, each bottom surface supporting plate and each side surface supporting plate are U-shaped, and foot anchor rod guide sleeves are arranged at the upper ends of the two side surface supporting plates.
The second technical problem to be solved by the invention is to provide a method for supporting the steel arch for the whole support of the full-section construction of the tunnel.
In order to solve the problems, the invention adopts the following technical scheme:
The method comprises the following steps:
first step, upper arch frame, middle arch frame and lower arch frame are connected
Welding connection discs among the upper arch center, the middle arch center and the lower arch center with the corresponding ends of the upper arch center, the middle arch center and the lower arch center, wherein the connection holes on the first flange plate and the second flange plate of each connection disc are opposite after welding;
Second, transporting to the supporting position
Folding and fixing the connecting discs among the upper arch frame, the middle arch frame and the lower arch frame through a fixing mechanism, and transporting the connecting discs to a supporting position through transportation equipment;
third step, supporting steel arch frame
Opening the fixing mechanism, and supporting the fixing mechanism from the middle part of the upper arch frame by using a lifting machine, wherein the middle arch frame and the lower arch frame droop under the action of self gravity;
Fourth, fixing the first flange plate and the second flange plate
Inserting a connecting bolt into the connecting holes of the first flange plate and the second flange plate, and screwing a nut on the connecting bolt;
Fifth step, drilling anchor rod holes and installing anchor rods
Drilling anchor rod holes on two side surfaces of the connecting disc, and installing anchor rods in the anchor rod holes;
sixth, fixing the anchor rod and the supporting steel arch frame
The anchor rods and the supporting steel arch are fixed by welding or other modes.
For the steel arch frame for the whole support of the tunnel full-section construction, which is provided with an anchor rod positioning frame on the connecting disc and an anchor rod guide sleeve on the anchor rod positioning frame, the support method comprises the following steps:
first step, upper arch frame, middle arch frame and lower arch frame are connected
Welding connection discs among the upper arch center, the middle arch center and the lower arch center with the corresponding ends of the upper arch center, the middle arch center and the lower arch center, wherein the connection holes on the first flange plate and the second flange plate of each connection disc are opposite after welding;
Second, transporting to the supporting position
Folding and fixing the connecting discs among the upper arch frame, the middle arch frame and the lower arch frame through a fixing mechanism, and transporting the connecting discs to a supporting position through transportation equipment;
third step, supporting steel arch frame
Opening the fixing mechanism, and supporting the fixing mechanism from the middle part of the upper arch frame by using a lifting machine, wherein the middle arch frame and the lower arch frame droop under the action of self gravity;
Fourth, fixing the first flange plate and the second flange plate
Inserting a connecting bolt into the connecting holes of the first flange plate and the second flange plate, and screwing a nut on the connecting bolt;
Fifth step, drilling anchor rod holes and installing anchor rods
And drilling a bolt hole along the direction of the bolt guide sleeve, inserting the bolt into the bolt guide sleeve and the bolt hole, and fixing the tail of the bolt in the bolt guide sleeve.
For the fixing hole matched with the position of the connecting hole is arranged on the anchor rod positioning frame, the anchor rod positioning frame is fixedly connected with the first flange plate and the second flange plate through connecting bolts, and the steel arch frame for the whole support of the full-section construction of the tunnel comprises the following steps:
first step, upper arch frame, middle arch frame and lower arch frame are connected
The hinge among the upper arch, the middle arch and the lower arch is welded with the ends of the corresponding upper arch, middle arch and lower arch, and the connecting holes on two hinge sheets of each hinge are opposite after welding;
Second, transporting to the supporting position
Folding and fixing hinges among the upper arch frame, the middle arch frame and the lower arch frame through a fixing mechanism, and transporting the upper arch frame, the middle arch frame and the lower arch frame to a supporting position through transportation equipment;
third step, supporting steel arch frame
Opening the fixing mechanism, and supporting the fixing mechanism from the middle part of the upper arch frame by using a lifting machine, wherein the middle arch frame and the lower arch frame droop under the action of self gravity;
fourthly, fixing the first flange plate and the second flange plate and fixing the anchor rod positioning frame
Placing an anchor rod positioning frame between the first flange plate and the second flange plate, enabling a fixing hole of the anchor rod positioning frame to be aligned with a connecting hole of the first flange plate and a connecting hole of the second flange plate, inserting connecting bolts into the connecting holes of the first flange plate, the second flange plate and the anchor rod positioning frame, and screwing nuts on the connecting bolts;
Fifth step, drilling anchor rod holes and installing anchor rods
And drilling a bolt hole along the direction of the bolt guide sleeve, inserting the bolt into the bolt guide sleeve and the bolt hole, and fixing the tail of the bolt in the bolt guide sleeve.
The method for supporting the steel arch frame for the whole tunnel full-section construction, which is provided with jacking connecting discs at the lower ends of the two lower arch frames, comprises the following steps:
first step, upper arch frame, middle arch frame and lower arch frame are connected
The hinge among the upper arch, the middle arch and the lower arch is welded with the ends of the corresponding upper arch, middle arch and lower arch, and the connecting holes on two hinge sheets of each hinge are opposite after welding;
Second, transporting to the supporting position
Folding and fixing hinges among the upper arch frame, the middle arch frame and the lower arch frame through a fixing mechanism, and transporting the upper arch frame, the middle arch frame and the lower arch frame to a supporting position through transportation equipment;
third step, supporting steel arch frame
Opening the fixing mechanism, and supporting the fixing mechanism from the middle part of the upper arch frame by using a lifting machine, wherein the middle arch frame and the lower arch frame droop under the action of self gravity;
fourthly, fixing the first flange plate and the second flange plate and fixing the anchor rod positioning frame
Placing an anchor rod positioning frame between the first flange plate and the second flange plate, enabling a fixing hole of the anchor rod positioning frame to be aligned with a connecting hole of the first flange plate and a connecting hole of the second flange plate, inserting connecting bolts into the connecting holes of the first flange plate, the second flange plate and the anchor rod positioning frame, and screwing nuts on the connecting bolts;
Fifthly, jacking the whole steel arch
Lifting the lower end of the lower arch frame by using a claw jack to drive the whole steel arch frame to move upwards until the upper surface of the upper arch frame is tightly attached to the inner surface of the top end of the tunnel;
sixth step, drilling a foot anchor rod hole and installing the foot anchor rod
Drilling a foot anchor rod hole along the direction of the foot anchor rod guide sleeve, inserting the foot anchor rod into the foot anchor rod guide sleeve and the foot anchor rod hole, and fixing the tail part of the foot anchor rod in the foot anchor rod guide sleeve;
Seventh, drilling anchor rod holes and installing anchor rods
And drilling a bolt hole along the direction of the bolt guide sleeve, inserting the bolt into the bolt guide sleeve and the bolt hole, and fixing the tail of the bolt in the bolt guide sleeve.
Compared with the prior art, the steel arch frame and the supporting method for the whole supporting of the full-section construction of the tunnel have the following advantages: firstly, because the steel arch comprises an upper arch positioned in the middle, two middle arches positioned at two ends of the upper arch and lower arches positioned at two ends of the middle arch, connecting discs are arranged between the upper arch and the middle arch and between the middle arch and the lower arch, the ends of the upper arch, the middle arch and the lower arch are fixedly connected with corresponding connecting discs, the connecting discs comprise a first flange plate and a second flange plate, one sides of the first flange plate and the second flange plate are movably connected through a connecting mechanism, connecting holes are formed in the first flange plate and the second flange plate, connecting bolts are arranged in the connecting holes, in the production process of the steel arches, the two ends of the steel arches which are required to be connected by the connecting discs are respectively welded with the first flange plate and the second flange plate, when processing is finished, the steel arches which are connected by the connecting discs are folded together through the connecting discs are fixed through fixing clamps or ropes, when the steel arches are transported to a supporting position, the fixing clamps or the ropes are opened, the upper flange plate is screwed down, the connecting bolts are easy to be inserted into the connecting holes, the upper flange plate is easy to be opened, the lower flange plate is easy to be connected, and the side of the upper flange plate is easy to be connected, and the lower flange plate is easy to be connected by the connecting bolts, and the upper flange plate is easy to be connected to be opened, and the upper flange plate is easy to be connected to the upper and lower, and to be connected to the upper and lower down by a flange and to the upper flange and to be connected to the upper flange and lower flange and to and the upper flange; secondly, as the connecting mechanism is a winch shaft connected with the first flange plate and the second flange plate; the first flange plate, the second flange plate and the hinge shaft form a hinge structure, so that the connecting holes on the first flange plate and the second flange plate are not easy to deviate, and the installation speed is high; thirdly, as the anchor rod positioning frame is arranged on the connecting disc, the anchor rod guiding sleeve is arranged on the anchor rod positioning frame, and the direction of the anchor rod guiding sleeve is set according to the local geological structure and the position of the anchor rod, so that the anchoring direction of the anchor rod is more reasonable, the anchor rod guiding sleeve combines the anchor rod with the steel arch together, the combination is firmer, and the anchor rod and the steel arch are not required to be welded; fourthly, as the anchor rod positioning frame is provided with the fixing hole matched with the connecting hole, the anchor rod positioning frame is fixedly connected with the first flange plate and the second flange plate through the connecting bolt, and the processing and the installation are more convenient; fifthly, as the lower ends of the two lower arches are provided with the jacking connecting disc, the jacking connecting disc comprises a bottom surface supporting plate fixedly connected with the bottoms of the lower arches, two sides of the bottom surface supporting plate are provided with side surface supporting plates, the bottom surface supporting plate and the side surface supporting plates are U-shaped, the upper ends of the two side surface supporting plates are provided with foot anchor rod guide sleeves, one side of the bottom surface supporting plate is provided with a claw type jack, and the lower end of the claw type jack is inserted below the bottom surface supporting plate; the claw type jack is characterized in that a wedge-shaped steel plate is arranged below the claw type jack, the steel arch is firstly erected, the wedge-shaped steel plate with the claw type jack at the upper end is inserted into the lower portion of the steel arch, the bottom surface supporting plate is located at the claw portion of the claw type jack, the claw type jack is used for lifting upwards to enable the steel arch to be closely attached to surrounding rock of a tunnel vault, the lifting is stopped, then anchor rod holes are drilled along the direction of the anchor rod guide sleeve of the foot portion, the anchor rod of the foot portion is inserted into the anchor rod guide sleeve of the foot portion and the anchor rod holes, the steel arch and the tunnel wall are anchored together, the claw type jack and the wedge-shaped steel plate are pulled out, construction is more convenient, the phenomenon that the arch portion is partially emptied when concrete is re-sprayed due to sinking of the steel arch is avoided, welding of the foot portion anchor rod and the steel arch is omitted, welding procedures are reduced, and the connection strength of the anchor rod and the steel arch is improved.
Drawings
FIG. 1 is a schematic structural view of a steel arch for whole support in full section construction of a tunnel;
FIG. 2 is a schematic structural view of a steel arch for whole support in full section construction of a tunnel after folding;
FIG. 3 is a schematic structural view of a connection pad;
FIG. 4 is a schematic structural view of a connection disc with an anchor rod positioning frame;
FIG. 5 is a schematic structural view of an anchor rod positioning frame;
FIG. 6 is a side view of the interface disc with the anchor bracket;
FIG. 7 is a schematic structural view of a jacking fixture;
fig. 8 is a schematic structural view of a jacking fixture with a partial lower arch.
Detailed Description
The structure and the use principle of the steel arch for the whole support for the full-section construction of the tunnel and the support method are further described in detail below with reference to the accompanying drawings and the specific embodiments.
As shown in fig. 1,2 and 3, the steel arch for whole support for full-section tunnel construction of the present invention comprises an upper arch 1 positioned in the middle, two middle arches 2 positioned at two ends of the upper arch 1, and a lower arch 3 positioned at two ends of the middle arch 2, wherein a connecting disc 4 is arranged between the upper arch 1 and the middle arch 2 and between the middle arch 2 and the lower arch 3, the ends of the upper arch 1, the middle arch 2 and the lower arch 3 are fixedly connected with the corresponding connecting disc 4, the connecting disc 4 comprises a first flange 5 and a second flange 6, one side of the first flange 5 and one side of the second flange 6 are movably connected through a connecting mechanism 7, connecting holes 8 are arranged on the first flange 5 and the second flange 6, and connecting bolts 9 are arranged in the connecting holes 8. In the production process of the steel arch, two ends of the steel arch, which are required to be connected by the connecting disc 4, are respectively welded with the first flange plate 5 and the second flange plate 6, and the first flange plate 5 and the second flange plate 6 are movably connected through a connecting mechanism 7. As shown in fig. 2, when the processing is completed, the steel arches connected through the connecting disc 4 are folded together and fixed by the fixing clamp or the rope, when the steel arches are transported to the supporting position, the fixing clamp or the rope is opened, the middle part of the upper arch 1 is lifted by the lifting machinery, the middle arch 2 and the lower arch 3 droop under the action of self gravity, at the moment, the connecting holes 8 of the first flange plate 5 and the second flange plate 6 are automatically aligned under the limit of the connecting mechanism 7, the connecting bolt 9 is easy to insert, the nut on the connecting bolt 9 is screwed, the operation time of workers at the supporting position is shortened, the accident rate caused by falling rocks or collapse is reduced, the installation efficiency is improved, and the labor intensity is reduced.
As shown in fig. 3, the connection mechanism 7 is a hinge shaft 10 connected with the first flange 5 and the second flange 6; the hinge structure is formed by the first flange plate 5, the second flange plate 6 and the hinge shaft 10, so that the connecting holes 8 on the first flange plate 5 and the second flange plate 6 are not easy to deviate, and the installation speed is high.
As shown in fig. 4,5 and 6, an anchor rod positioning frame 11 is arranged on the connecting disc 4, an anchor rod guiding sleeve 12 is arranged on the anchor rod positioning frame 11, and the direction of the anchor rod guiding sleeve 12 is set according to the local geological structure and the position of the anchor rod, so that the anchoring direction of the anchor rod is more reasonable, the anchor rod guiding sleeve 12 combines the anchor rod with the steel arch together, the combination is firmer, and the anchor rod and the steel arch are not welded any more.
The anchor rod positioning frame 11 and the first flange plate 5 are of an integral structure. Of course, the anchor rod positioning frame 11 can also have an independent structure as shown in fig. 5, the anchor rod positioning frame 11 is provided with a fixing hole 13 matched with the position of the connecting hole 8, the anchor rod positioning frame 11 is fixedly connected with the first flange plate 5 and the second flange plate 6 through the connecting bolt 9, the processing and the installation are more convenient, of course, as shown in fig. 1, 7 and 8, the lower ends of the two lower arches 3 are also provided with lifting connection discs 14, the lifting connection discs 14 comprise bottom surface supporting plates 15 fixedly connected with the bottoms of the lower arches 3, the two sides of the bottom surface supporting plates 15 are provided with side supporting plates 16, the bottom surface supporting plates 15 and the side surface supporting plates 16 are U-shaped, the upper ends of the two side surface supporting plates 16 are provided with foot anchor rod guide sleeves 17, one side of the bottom surface supporting plates 15 is provided with claw jacks 18, and the lower ends of claw portions 19 of the claw jacks 18 are inserted below the bottom surface 15; a wedge-shaped steel plate 20 is provided below the claw jack 18. Firstly, the steel arch is erected, the wedge-shaped steel plate 20 with the claw jack 18 at the upper end is inserted under the lower arch 3, the bottom surface supporting plate 15 is positioned above the claw 19 of the claw jack 18, the claw jack 18 is lifted upwards to enable the steel arch to be closely attached to surrounding rock of a tunnel vault, the lifting is stopped, then the anchor rod holes are drilled along the direction of the foot anchor rod guide sleeve 17, the foot anchor rods are inserted into the foot anchor rod guide sleeve and the anchor rod holes, the steel arch and the tunnel wall are anchored together, the claw jack 18 and the wedge-shaped steel plate 20 are pulled out, construction is more convenient, the phenomenon that the arch part is partially emptied when the concrete is re-sprayed due to sinking of the steel arch is avoided, the welding procedure of the foot anchor rods and the steel arch is not needed, and the connection strength of the anchor rods and the steel arch is improved.
The method for supporting the steel arch frame for the whole support of the full-section construction of the tunnel comprises the following steps:
The method comprises the following steps:
first, the upper arch 1, the middle arch 2 and the lower arch 3 are connected
The connecting discs 4 among the upper arch 1, the middle arch 2 and the lower arch 3 are welded with the ends of the corresponding upper arch 1, middle arch 2 and lower arch 3, and the connecting holes 8 on the first flange 5 and the second flange 6 of each connecting disc 4 are opposite after welding;
Second, transporting to the supporting position
Folding and fixing the connecting discs 4 among the upper arch 1, the middle arch 2 and the lower arch 3 through a fixing mechanism, and transporting to a supporting position by using transport equipment;
third step, supporting steel arch frame
The fixing mechanism is opened, the middle part of the upper arch 1 is lifted by a lifting machine, and the middle arch 2 and the lower arch 3 droop under the action of self gravity;
Fourth, fixing the first flange plate and the second flange plate
Inserting a connecting bolt 9 into the connecting holes 8 of the first flange plate 5 and the second flange plate 6, and screwing nuts on the connecting bolt 9;
Fifth step, drilling anchor rod holes and installing anchor rods
Anchor rod holes are drilled on two side surfaces of the connecting disc 4, and anchor rods are arranged in the anchor rod holes;
sixth, fixing the anchor rod and the supporting steel arch frame
The anchor rods and the supporting steel arch are fixed by welding or other modes.
For the steel arch frame for the whole support of the tunnel full-section construction, which is provided with the anchor rod positioning frame 11 on the connecting disc 4 and the anchor rod guiding sleeve 12 on the anchor rod positioning frame 11, the support method comprises the following steps:
first, the upper arch 1, the middle arch 2 and the lower arch 3 are connected
The connecting discs 4 among the upper arch 1, the middle arch 2 and the lower arch 3 are welded with the ends of the corresponding upper arch 1, middle arch 2 and lower arch 3, and the connecting holes 8 on the first flange 5 and the second flange 6 of each connecting disc 4 are opposite after welding;
Second, transporting to the supporting position
Folding and fixing the connecting discs 4 among the upper arch 1, the middle arch 2 and the lower arch 3 through a fixing mechanism, and transporting to a supporting position by using transport equipment;
third step, supporting steel arch frame
The fixing mechanism is opened, the middle part of the upper arch 1 is lifted by a lifting machine, and the middle arch 2 and the lower arch 3 droop under the action of self gravity;
Fourth, fixing the first flange plate and the second flange plate
Inserting a connecting bolt 9 into the connecting holes 8 of the first flange plate 5 and the second flange plate 6, and screwing nuts on the connecting bolt 9;
Fifth step, drilling anchor rod holes and installing anchor rods
And drilling a bolt hole along the direction of the bolt guide sleeve 12, inserting a bolt into the bolt guide sleeve 12 and the bolt hole, and fixing the tail of the bolt in the bolt guide sleeve 12.
For the steel arch frame for the whole tunnel section construction, which is provided with the fixing holes 13 matched with the positions of the connecting holes 8 on the anchor rod positioning frame 11, the anchor rod positioning frame 11 is fixedly connected with the first flange plate 5 and the second flange plate 6 through the connecting bolts 9, and the supporting method comprises the following steps:
first, the upper arch 1, the middle arch 2 and the lower arch 3 are connected
The connecting discs 4 among the upper arch 1, the middle arch 2 and the lower arch 3 are welded with the ends of the corresponding upper arch 1, middle arch 2 and lower arch 3, and the connecting holes 8 on the first flange 5 and the second flange 6 of each connecting disc 4 are opposite after welding;
Second, transporting to the supporting position
Folding and fixing the connecting discs 4 among the upper arch 1, the middle arch 2 and the lower arch 3 through a fixing mechanism, and transporting to a supporting position by using transport equipment;
third step, supporting steel arch frame
The fixing mechanism is opened, the middle part of the upper arch 1 is lifted by a lifting machine, and the middle arch 2 and the lower arch 3 droop under the action of self gravity;
fourthly, fixing the first flange plate and the second flange plate and fixing the anchor rod positioning frame
Placing an anchor rod positioning frame 11 between the first flange plate 5 and the second flange plate 6, enabling a fixing hole 13 of the anchor rod positioning frame 11 to be aligned with a connecting hole 8 of the first flange plate 5 and the second flange plate 6, inserting a connecting bolt 9 into the connecting holes 8 of the first flange plate 5, the second flange plate 6 and the anchor rod positioning frame 11, and screwing a nut on the connecting bolt;
Fifth step, drilling anchor rod holes and installing anchor rods
And drilling a bolt hole along the direction of the bolt guide sleeve 12, inserting a bolt into the bolt guide sleeve 12 and the bolt hole, and fixing the tail of the bolt in the bolt guide sleeve 12.
The method for supporting the steel arch for the whole tunnel full-section construction, which is provided with jacking connection discs at the lower ends of the two lower arches 3, comprises the following steps:
first, the upper arch 1, the middle arch 2 and the lower arch 3 are connected
The connecting discs 4 among the upper arch 1, the middle arch 2 and the lower arch 3 are welded with the ends of the corresponding upper arch 1, middle arch 2 and lower arch 3, and the connecting holes 8 on the first flange 5 and the second flange 6 of each connecting disc 4 are opposite after welding;
Second, transporting to the supporting position
Folding and fixing the connecting discs 4 among the upper arch 1, the middle arch 2 and the lower arch 3 through a fixing mechanism, and transporting to a supporting position by using transport equipment;
third step, supporting steel arch frame
The fixing mechanism is opened, the middle part of the upper arch 1 is lifted by a lifting machine, and the middle arch 2 and the lower arch 3 droop under the action of self gravity;
fourthly, fixing the first flange plate and the second flange plate and fixing the anchor rod positioning frame
Placing an anchor rod positioning frame 11 between the first flange plate 5 and the second flange plate 6, enabling a fixing hole 13 of the anchor rod positioning frame 11 to be aligned with a connecting hole 8 of the first flange plate 5 and the second flange plate 6, inserting a connecting bolt 9 into the connecting holes 8 of the first flange plate 5, the second flange plate 6 and the anchor rod positioning frame 11, and screwing a nut on the connecting bolt;
Fifthly, jacking the whole steel arch
The claw jack 18 is used for lifting the lower end of the lower arch frame 3 to drive the whole steel arch frame to move upwards until the upper surface of the upper arch frame is tightly attached to the inner surface of the top end of the tunnel;
sixth step, drilling a foot anchor rod hole and installing the foot anchor rod
Drilling a foot anchor rod hole along the direction of the foot anchor rod guide sleeve 17, inserting the foot anchor rod into the foot anchor rod guide sleeve 17 and the foot anchor rod hole, and fixing the tail of the foot anchor rod in the foot anchor rod guide sleeve;
Seventh, drilling anchor rod holes and installing anchor rods
And drilling a bolt hole along the direction of the bolt guide sleeve 12, inserting a bolt into the bolt guide sleeve 12 and the bolt hole, and fixing the tail of the bolt in the bolt guide sleeve 12.
The protection scope of the present invention is not limited to the above embodiments, and it is within the protection scope of the present invention as long as the structure is the same as or similar to the steel arch structure for whole support of full section construction of the tunnel of the present invention, and the support method is the same as or similar to the support method.
Claims (4)
1. The utility model provides a whole steel bow member for supporting of full section construction in tunnel, is including being located the last bow member in middle part, being located two well bow members at going up bow member both ends and being located the lower bow member at well bow member both ends, its characterized in that: connecting discs are arranged between the upper arch frame and the middle arch frame and between the middle arch frame and the lower arch frame, the end parts of the upper arch frame, the middle arch frame and the lower arch frame are fixedly connected with the corresponding connecting discs, the connecting discs comprise a first flange plate and a second flange plate, one sides of the first flange plate and the second flange plate are movably connected through a connecting mechanism, connecting holes are formed in the first flange plate and the second flange plate, connecting bolts are arranged in the connecting holes, an anchor rod positioning frame is arranged on the connecting discs, anchor rod guide sleeves are arranged on the anchor rod positioning frame, fixing holes matched with the connecting holes in position are formed in the anchor rod positioning frame, and the anchor rod positioning frame is fixedly connected with the first flange plate and the second flange plate through the connecting bolts; the lower ends of the two lower arches are provided with jacking connecting discs, each jacking connecting disc comprises a bottom surface supporting plate fixedly connected with the bottom of each lower arch, two sides of each bottom surface supporting plate are provided with side surface supporting plates, each bottom surface supporting plate and each side surface supporting plate are U-shaped, and the upper ends of the two side surface supporting plates are provided with foot anchor rod guide sleeves.
2. The steel arch for whole support for full face construction of tunnel according to claim 1, wherein: the connecting mechanism is a winch shaft connected with the first flange plate and the second flange plate.
3. The method for processing and supporting the steel arch for the whole support of the full-section tunnel construction, which is characterized by comprising the following steps of: the method comprises the following steps:
first step, upper arch frame, middle arch frame and lower arch frame are connected
The hinge among the upper arch, the middle arch and the lower arch is welded with the ends of the corresponding upper arch, middle arch and lower arch, and the connecting holes on two hinge sheets of each hinge are opposite after welding;
Second, transporting to the supporting position
Folding and fixing hinges among the upper arch frame, the middle arch frame and the lower arch frame through a fixing mechanism, and transporting the upper arch frame, the middle arch frame and the lower arch frame to a supporting position through transportation equipment;
third step, supporting steel arch frame
Opening the fixing mechanism, and supporting the fixing mechanism from the middle part of the upper arch frame by using a lifting machine, wherein the middle arch frame and the lower arch frame droop under the action of self gravity;
fourthly, fixing the first flange plate and the second flange plate and fixing the anchor rod positioning frame
Placing an anchor rod positioning frame between the first flange plate and the second flange plate, enabling a fixing hole of the anchor rod positioning frame to be aligned with a connecting hole of the first flange plate and a connecting hole of the second flange plate, inserting connecting bolts into the connecting holes of the first flange plate, the second flange plate and the anchor rod positioning frame, and screwing nuts on the connecting bolts;
Fifth step, drilling anchor rod holes and installing anchor rods
And drilling a bolt hole along the direction of the bolt guide sleeve, inserting the bolt into the bolt guide sleeve and the bolt hole, and fixing the tail of the bolt in the bolt guide sleeve.
4. The method for processing and supporting the steel arch for the whole support of the full-section tunnel construction, which is characterized by comprising the following steps of: the method comprises the following steps:
first step, upper arch frame, middle arch frame and lower arch frame are connected
The hinge among the upper arch, the middle arch and the lower arch is welded with the ends of the corresponding upper arch, middle arch and lower arch, and the connecting holes on two hinge sheets of each hinge are opposite after welding;
Second, transporting to the supporting position
Folding and fixing hinges among the upper arch frame, the middle arch frame and the lower arch frame through a fixing mechanism, and transporting the upper arch frame, the middle arch frame and the lower arch frame to a supporting position through transportation equipment;
third step, supporting steel arch frame
Opening the fixing mechanism, and supporting the fixing mechanism from the middle part of the upper arch frame by using a lifting machine, wherein the middle arch frame and the lower arch frame droop under the action of self gravity;
fourthly, fixing the first flange plate and the second flange plate and fixing the anchor rod positioning frame
Placing an anchor rod positioning frame between the first flange plate and the second flange plate, enabling a fixing hole of the anchor rod positioning frame to be aligned with a connecting hole of the first flange plate and a connecting hole of the second flange plate, inserting connecting bolts into the connecting holes of the first flange plate, the second flange plate and the anchor rod positioning frame, and screwing nuts on the connecting bolts;
Fifthly, jacking the whole steel arch
Lifting the lower end of the lower arch frame by using a claw jack to drive the whole steel arch frame to move upwards until the upper surface of the upper arch frame is tightly attached to the inner surface of the top end of the tunnel;
sixth step, drilling a foot anchor rod hole and installing the foot anchor rod
Drilling a foot anchor rod hole along the direction of the foot anchor rod guide sleeve, inserting the foot anchor rod into the foot anchor rod guide sleeve and the foot anchor rod hole, and fixing the tail part of the foot anchor rod in the foot anchor rod guide sleeve;
Seventh, drilling anchor rod holes and installing anchor rods
And drilling a bolt hole along the direction of the bolt guide sleeve, inserting the bolt into the bolt guide sleeve and the bolt hole, and fixing the tail of the bolt in the bolt guide sleeve.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811257159.6A CN109306870B (en) | 2018-10-26 | 2018-10-26 | Steel arch frame for whole support of tunnel full-section construction and support method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811257159.6A CN109306870B (en) | 2018-10-26 | 2018-10-26 | Steel arch frame for whole support of tunnel full-section construction and support method |
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| CN109306870B true CN109306870B (en) | 2024-05-03 |
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| CN112682071B (en) * | 2021-01-15 | 2023-11-24 | 招商局重庆公路工程检测中心有限公司 | Tunnel arch and tunnel arch mounting method |
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