CN113006834B - Tunnel steel arch support deformation adjusting device and adjusting method - Google Patents
Tunnel steel arch support deformation adjusting device and adjusting method Download PDFInfo
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- CN113006834B CN113006834B CN202110284312.XA CN202110284312A CN113006834B CN 113006834 B CN113006834 B CN 113006834B CN 202110284312 A CN202110284312 A CN 202110284312A CN 113006834 B CN113006834 B CN 113006834B
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 110
- 239000010959 steel Substances 0.000 title claims abstract description 110
- 238000000034 method Methods 0.000 title claims abstract description 16
- 239000011435 rock Substances 0.000 claims abstract description 66
- 230000007246 mechanism Effects 0.000 claims abstract description 23
- 238000009412 basement excavation Methods 0.000 claims abstract description 14
- 238000004873 anchoring Methods 0.000 claims description 14
- 238000006073 displacement reaction Methods 0.000 claims description 7
- 239000004567 concrete Substances 0.000 claims description 6
- 125000006850 spacer group Chemical group 0.000 claims description 4
- 230000009286 beneficial effect Effects 0.000 claims description 3
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 3
- 230000003044 adaptive effect Effects 0.000 claims description 2
- 125000003003 spiro group Chemical group 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract description 10
- 230000008569 process Effects 0.000 description 3
- 230000003014 reinforcing effect Effects 0.000 description 3
- 239000011378 shotcrete Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000003245 working effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000007921 spray Substances 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
- E21D11/14—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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention discloses a tunnel steel arch support deformation adjusting device and an adjusting method, wherein the tunnel steel arch support deformation adjusting device comprises a plurality of sections of I-shaped steel, the plurality of sections of I-shaped steel are assembled into an arch support structure matched with the tunnel excavation outline, a telescopic mechanism for adjusting the distance between the adjacent I-shaped steel is arranged between the adjacent sections of I-shaped steel, and a telescopic ejection mechanism for contacting with the bottom of a surrounding rock cavity is arranged on each section of I-shaped steel; the method has the advantages that the method has the function of evenly distributing the load by adjusting the deformation of the surrounding rock and the load adjustment of the surrounding rock, so that the deformation of the surrounding rock is better coped with, and the construction safety is guaranteed.
Description
Technical Field
The invention relates to the technical field of tunnel construction, in particular to a device and a method for adjusting support deformation of a tunnel steel arch.
Background
In recent years, the construction of highways in China enters a rapid development period, the investment of provinces in mountains in inland is more and more, tunnels are more in mountainous areas, primary support in the tunnel construction process is more important, steel arches are more main support forms, and the steel arches have the following main functions: 1. supporting the surrounding rock before the sprayed concrete acts; 2. reinforcing the sprayed concrete; 3. as the supporting point of the advance support; 4. the concrete can play the role of primary support together with anchor rods and sprayed concrete. In conclusion, the tunnel steel arch frame not only has enough strength, but also meets the requirement of uniform deformation of the tunnel surrounding rock, so that the deformation uniformity influences the overall stress condition and stability of the tunnel surrounding rock; the deformation of the surrounding rock is not only related to the strength of the steel arch, but also related to the contact uniformity between the arch and the surrounding rock, and when the contact between the arch and the surrounding rock is not uniform, the condition of the deformation of the surrounding rock can be changed, so that the stress load concentration part of the arch becomes a stress weak point, the deformation is generated under the action of the pressure of the surrounding rock, and the construction safety of the tunnel is endangered.
Generally softer, loose tunnel country rock, at the excavation in-process, deformation of great amplitude can appear in the tunnel inside, and traditional steel bow member bearing structure is fixed arch shape usually, can't accomplish to adapt to on the country rock inner wall that easily takes place deformation completely, and is more weak to the deformation control dynamics of country rock, and in the excavation in-process, too big country rock deformation very easily causes steel bow member bearing structure's distortion deformation moreover, and then produces serious influence to the construction quality and the safety in tunnel.
Disclosure of Invention
In order to solve the defects in the prior art, the invention provides a tunnel steel arch support deformation adjusting device and an adjusting method, which have the functions of adjusting surrounding rock deformation and load adjustment and load sharing of surrounding rocks, so that the deformation of the surrounding rocks can be better responded, and the construction safety is guaranteed.
One of the technical solutions adopted by the present invention to solve the above technical problems is: the utility model provides a tunnel steel bow member supports deformation adjusting device, includes multisection I-steel, multisection I-steel assemble into the arch bearing structure who suits with tunnel excavation profile, adjacent festival section the I-steel between be provided with the telescopic machanism who is used for adjusting distance between the adjacent I-steel, every section the I-steel on be provided with be used for with the surrounding rock cavity bottom contact flexible ejection mechanism.
A first frame is fixed at one end of each section of I-shaped steel, a second frame is fixed at the other end of each section of I-shaped steel, the first frame is sleeved in the second frame adjacent to the I-shaped steel, and the telescopic mechanism is connected between the first frame and the second frame adjacent to the I-shaped steel. In the structure, the first frame is sleeved on the second frame, so that the first frame can slide relative to the second frame, and the distance between two adjacent sections of I-shaped steel can be flexibly and slightly adjusted under the action of the telescopic mechanism, so that the requirement on deformation of the tunnel surrounding rock can be better met.
The first frame by first bottom plate with fix first bottom plate on three first curb plates constitute, first bottom plate fix the I-steel on, three first curb plates be located respectively on three sides of first bottom plate, and connect gradually, every first curb plate on seted up at least one first spacing groove, the second frame by the second bottom plate with fix the second bottom plate on three second curb plates constitute, the second bottom plate fix the I-steel on, three the second curb plate be located respectively on the three sides of second bottom plate, and connect gradually, every the second curb plate on seted up at least one with the corresponding second spacing groove of first spacing groove, just first spacing groove with correspond the second spacing groove between be connected with a movable spacer pin. In this structure, the spacer pin is located first spacing groove and second spacing inslot, can guarantee on the one hand like this that first frame and second frame are flexible difficult dislocation between the two, and both are difficult for the separation, and on the other hand plays the limiting displacement to first frame and second frame stroke between the two again, avoids appearing the too big condition of both intervals.
The telescopic mechanism comprises a first jack connected to the center of the second frame, and the movable end of the first jack acts on the first frame adjacent to the I-shaped steel. In this structure, adopt first jack to adjust adjacent I-steel telescopic distance to this contact country rock, the deformation of control country rock is even, and the regulation mode is simple, and also more steady in the aspect of the working property is connected in proper order because three first curb plates in addition for first frame has an opening, and three second curb plates connect in proper order, makes first frame also have an opening, and the later stage of being convenient for like this is demolishd first jack.
The telescopic mechanism further comprises four spiral anchoring parts connected in the second frame, the four spiral anchoring parts are located on the periphery of the first jack, and the movable ends of the spiral anchoring parts act on the first frames of the adjacent I-shaped steel. In this structure, spiral anchoring part is screw jack, its equipartition is around first jack, when first jack carries out the deformation adjustment, through arranging the displacement sensor in the different positions in the steel bow member outside, gather the deformation of country rock, when steel bow member outside country rock deformation reaches evenly, rethread spiral anchoring part's flexible, anchor two adjacent sections I-steel, then take out first jack, use for next regulation, spray anchor support concrete in to first frame and the second frame at last, in order to guarantee the even and safety of country rock deformation.
The telescopic ejection mechanism comprises a movable template, a fixed template, a second jack and a top plate, wherein the top plate is used for contacting with the bottom of the surrounding rock cavity, the fixed template is fixed on the I-shaped steel, the second jack is fixed on the fixed template, the movable template is fixed on the movable end of the second jack, and the top plate is connected with the movable template through a connecting assembly. In this structure, the fixed die plate is fixed on the I-steel, provides the mounted position for the second jack, because the position of second jack is fixed, when the second jack during operation, drives the movable mould board motion, and the movable mould board passes through coupling assembling and is connected with the roof, consequently at the in-process of movable mould board motion, the roof also moves thereupon to can carry out adaptability adjustment country rock according to the country rock condition of difference and warp, with the guarantee construction safety.
Coupling assembling include first splint and second splint, first splint hug closely the lateral wall of I-steel on, second splint hug closely another lateral wall of I-steel on, first splint with the second splint between be connected through many movable screw rods, many movable screw rod equipartition be in the both sides of I-steel, movable screw rod one end with the roof be connected, movable screw rod the other end with movable mould board be connected, movable screw rod on still the spiro union have first bolt, second bolt and third bolt, first bolt hug closely first splint on, the second bolt hug closely second splint on, the third bolt hug closely movable mould board on. In the structure, in the initial state, the first bolt and the second bolt are in a non-tight state, the first clamping plate and the second clamping plate are connected through the movable screw rod, so that the position of the first clamping plate and the position of the second clamping plate on the I-shaped steel can be adjusted, the movable screw rod is driven to move by driving the second jack after the adjustment is finished, the purpose of moving the top plate is achieved, the first bolt and the second bolt are screwed until the bottom of a contact cavity of the top plate and the surrounding rock is achieved, the position of the movable screw rod is kept still, the I-shaped steel is tightly attached to the first clamping plate and the second clamping plate, and the purpose of completely supporting the surrounding rock is achieved.
First splint with the second splint between still be connected with many and decide the screw rod, many decide the screw rod equipartition and be in the both sides of I-steel, the fixed die plate pass through the locking bolt to be fixed decide on the screw rod. In the structure, the movable template is connected with the fixed screw through the locking bolt, after the second jack drives the top plate to be hardened, the locking bolt is loosened, and the second jack is disassembled to be used by the next H-shaped steel.
The second technical scheme adopted by the invention for solving the technical problems is as follows: a method for adjusting the support deformation of a tunnel steel arch by adopting a device for adjusting the support deformation of the tunnel steel arch comprises the following steps:
s1: after tunnel excavation is finished, assembling multiple sections of I-shaped steel into an arch supporting structure which is adaptive to the tunnel excavation outline, and preliminarily controlling the deformation of surrounding rocks;
s2: controlling a second jack to stop working after the top plate is contacted with the bottom of the surrounding rock cavity;
s3: adjusting the first bolt and the second bolt, and fixing the movable screw rod with the first clamping plate and the second clamping plate;
s4: loosening the locking bolt, and dismantling the fixed screw rod, the fixed template and the second jack;
s5: synchronously adjusting the first jacks, acquiring the deformation condition of the surrounding rock through displacement sensors arranged at different positions outside the arch supporting structure, and stopping the first jacks when the deformation of the surrounding rock is uniform;
s6: adjusting the spiral anchoring piece to anchor the two adjacent sections of I-shaped steel;
s7: taking out the first jack, spraying anchor support concrete into the first frame and the second frame, and curing to the age so as to ensure the uniformity and safety of deformation of the surrounding rock;
s8: and repeating S1-S7 until the top plates on all the section I-steel are contacted with the bottom of the surrounding rock cavity, and finishing the adjustment of the whole section of tunnel, thereby being beneficial to advancing and excavating the subsequent section of tunnel.
Compared with the prior art, the invention has the advantages that:
1. through the arrangement of the telescopic mechanism, the steel arch frame can have a telescopic deformation adjusting function, the adjustment between the steel arch frame and the surrounding rock deformation is realized, and the surrounding rock deformation can be uniform and reasonable along the direction of the steel arch frame through the adjustment so as to ensure the safety requirement in tunnel construction;
2. through the setting of flexible ejection mechanism, can let the steel bow member finely tune the cavity bottom in the better support tunnel country rock excavation, play the even mesh of better regulation country rock deformation, make tunnel lining's atress more even reasonable, guarantee the safety of the tunnel lining among the operation process.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic perspective view of two adjacent I-beams of the present invention;
FIG. 3 is a schematic perspective view of the exploded view of FIG. 2 according to the present invention;
FIG. 4 is a schematic perspective view of the I-steel of the present invention in cooperation with a telescopic ejection mechanism;
fig. 5 is a perspective view of the second jack of fig. 4 with the second jack removed.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, but the present invention is not limited thereto.
The first embodiment is as follows: as shown in the figure, the tunnel steel arch support deformation adjusting device comprises multiple sections of I-shaped steel 1, the multiple sections of I-shaped steel are assembled into an arch support structure matched with a tunnel excavation profile, a telescopic mechanism 2 used for adjusting the distance between the adjacent I-shaped steel 1 is arranged between the adjacent sections of I-shaped steel 1, and a telescopic ejection mechanism 3 used for being in contact with the bottom of a surrounding rock cavity is arranged on each section of I-shaped steel 1.
A first frame 4 is fixed at one end of each section of I-steel 1, a second frame 5 is fixed at the other end of each section of I-steel 1, the first frame 4 is sleeved in the second frame 5 of the adjacent I-steel 1, and the telescopic mechanism 2 is connected between the first frame 4 and the second frame 5 of the adjacent I-steel 1. In this structure, first frame 4 cover is established in second frame 5, and first frame 4 can slide relative second frame 5 like this to under telescopic machanism 2's effect, make the interval between two adjacent sections I-steel 1 can nimble micro-adjustment, thereby better satisfy tunnel country rock deformation requirement.
The first frame 4 is composed of a first bottom plate 41 and three first side plates 42 fixed on the first bottom plate 41, the first bottom plate 41 is fixed on the i-beam 1, the three first side plates 42 are respectively located on three sides of the first bottom plate 41 and are sequentially connected, at least one first limiting groove 43 is formed in each first side plate, the second frame 5 is composed of a second bottom plate 51 and three second side plates 52 fixed on the second bottom plate 51, the second bottom plate 51 is fixed on the i-beam 1, the three second side plates 52 are respectively located on three sides of the second bottom plate 51 and are sequentially connected, at least one second limiting groove 53 corresponding to the first limiting groove 43 is formed in each second side plate 52, and a sliding limiting pin 6 is connected between the first limiting groove 43 and the second limiting groove 53. In this structure, spacer pin 6 is located first spacing groove 43 and second spacing groove 53, can guarantee the difficult dislocation of flexible between first frame 4 and the second frame 5 on the one hand like this, and both are difficult for separating, and on the other hand plays the limiting displacement to the stroke between first frame 4 and the second frame 5 again, avoids appearing the too big condition of both intervals.
A first reinforcing plate is further connected between the first base plate 41 and the I-steel 1 and fixed with the I-steel in a welding mode, a second reinforcing plate is further connected between the second base plate 51 and the I-steel 1 and fixed with the I-steel in a welding mode.
The telescopic mechanism 2 comprises a first jack 21 connected to the center of the second frame 5, and the movable end of the first jack 21 acts on the first frame 4 of the adjacent I-shaped steel 1. In this structure, adopt first jack 21 to adjust adjacent I-steel 1 flexible contact country rock to the deformation of control country rock is even, and the regulation mode is simple, and also more steady in the aspect of the working property is because three first curb plates 42 connect gradually, makes first frame 4 have an opening in addition, and three second curb plates 52 connect gradually, makes first frame 4 also have an opening, and the later stage of being convenient for like this is demolishd first jack 21.
The telescopic mechanism 2 further comprises four spiral anchoring pieces 22 connected to the inner side of the second frame 5, the four spiral anchoring pieces 22 are located on the periphery of the first jack 21, and the movable ends of the spiral anchoring pieces 22 act on the first frames 4 of the adjacent I-shaped steel 1. In this structure, spiral anchor member 22 is screw jack, its equipartition is around first jack 21, when first jack 21 carried out the deformation adjustment, through arranging the displacement sensor in the different positions in the steel bow member outside, gather the deformation of country rock, when the country rock deformation of steel bow member outside reaches evenly, rethread spiral anchor member 22 stretches out and draws back, anchor two adjacent I-steel 1, then take out first jack 21, for next regulation use, spout anchor support concrete to first frame 4 and second frame 5 in last, in order to guarantee the even and safety of country rock deformation.
The telescopic ejection mechanism 3 comprises a movable template 31, a fixed template 32, a second jack 33 and a top plate 34 used for being in contact with surrounding rocks, the fixed template 32 is fixed on the I-steel 1, the second jack 33 is fixed on the fixed template 32, the movable template 31 is fixed on the movable end of the second jack 33, and the top plate 34 is connected with the movable template 31 through a connecting assembly 7. In the structure, the fixed template 32 is fixed on the I-steel 1 and provides an installation position for the second jack 33, and the position of the second jack 33 is fixed, so that when the second jack 33 works, the movable template 31 is driven to move, the movable template 31 is connected with the top plate 34 through the connecting component 7, and the top plate 34 also moves along with the movable template 31 in the moving process of the movable template 31, so that the adaptability adjustment can be performed according to different surrounding rock conditions, and the construction safety is guaranteed.
The connecting assembly 7 comprises a first clamping plate 71 and a second clamping plate 72, wherein the first clamping plate 71 is tightly attached to the side wall of the I-steel 1, the second clamping plate 72 is tightly attached to the other side wall of the I-steel 1, the first clamping plate 71 and the second clamping plate 72 are connected through a plurality of movable screw rods 73, the movable screw rods 73 are uniformly distributed on two sides of the I-steel 1, one end of each movable screw rod 73 is connected with the top plate 34, the other end of each movable screw rod 73 is connected with the movable template 31, a first bolt 74, a second bolt 75 and a third bolt 76 are further screwed on each movable screw rod 73, the first bolt 74 is tightly attached to the first clamping plate 71, the second bolt 75 is tightly attached to the second clamping plate 72, and the third bolt 76 is tightly attached to the movable template 31. In the structure, in an initial state, the first bolt 74 and the second bolt 75 are in a non-tight state, the first clamping plate 71 and the second clamping plate 72 are connected through the movable screw 73, so that the positions of the first clamping plate 71 and the second clamping plate 72 on the I-shaped steel 1 can be adjusted, after the adjustment is finished, the movable screw 73 is driven to move by driving the second jack 33, the purpose of moving the top plate 34 is achieved, the top plate 34 is contacted with the bottom of the cavity of the surrounding rock, the first bolt 74 and the second bolt 75 are screwed, the position of the movable screw 73 is kept still, the position of the top plate 34 is fixed, and the first clamping plate 71 and the second clamping plate 72 tightly cling to the I-shaped steel 1, so that the purpose of completely supporting the surrounding rock is achieved.
A plurality of fixed screws 77 are further connected between the first clamping plate 71 and the second clamping plate 72, the plurality of fixed screws 77 are uniformly distributed on two sides of the joist steel 1, and the fixed template 32 is fixed on the fixed screws 77 through locking bolts 78. In this structure, the movable die plate 31 is connected to the fixed screw 77 by the locking bolt 78, and after the second jack 33 finishes driving the top plate 34, the locking bolt 78 is loosened to detach the second jack 33 for the next h-beam 1.
The second embodiment: as shown in the figure, a method for adjusting the support deformation of a steel arch of a tunnel by using a device for adjusting the support deformation of a steel arch of a tunnel according to the first embodiment includes the following steps:
s1: after the tunnel excavation is finished, assembling multiple sections of I-shaped steel into an arch supporting structure matched with the tunnel excavation profile, and preliminarily controlling the deformation of surrounding rocks;
s2: controlling the second jack to stop working after the top plate is contacted with the surrounding rock cavity;
s3: adjusting the first bolt and the second bolt, and fixing the movable screw rod with the first clamping plate and the second clamping plate;
s4: loosening the locking bolt, and dismantling the fixed screw rod, the fixed template and the second jack;
s5: synchronously adjusting a first jack, acquiring the deformation condition of the surrounding rock through displacement sensors arranged at different positions outside the arch supporting structure, and stopping the first jack when the deformation of the surrounding rock is uniform;
s6: adjusting the spiral anchoring piece to anchor the two adjacent sections of I-shaped steel;
s7: taking out the first jack, spraying anchor support concrete into the first frame and the second frame, and curing to the age so as to ensure the uniformity and safety of the deformation of the surrounding rock;
s8: and repeating S1-S7 until the top plates on all the section I-beams are contacted with the bottom of the surrounding rock cavity, and finishing the adjustment of the whole section of tunnel, thereby being beneficial to forward excavation of the subsequent section of tunnel.
It should be noted that the above-mentioned embodiments are only preferred embodiments of the present invention, and do not limit the scope of the present invention, and the present invention may be modified in materials and structures, or replaced with technical equivalents. Therefore, structural equivalents made by using the description and drawings of the present invention or by directly or indirectly applying to other related arts are also encompassed within the scope of the present invention.
Claims (4)
1. The utility model provides a tunnel steel bow member supports deformation adjusting device, includes multisection I-steel, multisection the I-steel assemble into with the tunnel excavation profile adapted's hunch bearing structure, its characterized in that: a telescopic mechanism for adjusting the distance between the adjacent I-beams is arranged between the adjacent sections of I-beams, and a telescopic ejection mechanism for contacting the bottom of the surrounding rock cavity is arranged on each section of I-beam;
a first frame is fixed at one end of each section of the I-shaped steel, a second frame is fixed at the other end of each section of the I-shaped steel, the first frame is sleeved in the second frame adjacent to the I-shaped steel, and the telescopic mechanism is connected between the first frame and the second frame adjacent to the I-shaped steel;
the telescopic mechanism comprises a first jack connected to the center of the second frame, and the movable end of the first jack acts on the first frame adjacent to the I-shaped steel;
the telescopic mechanism further comprises four spiral anchoring parts connected in the second frame, the four spiral anchoring parts are positioned around the first jack, and the movable ends of the spiral anchoring parts act on the first frame adjacent to the I-shaped steel;
the telescopic ejection mechanism comprises a movable template, a fixed template, a second jack and a top plate, wherein the top plate is used for being in contact with the bottom of the surrounding rock cavity;
coupling assembling include first splint and second splint, first splint hug closely the lateral wall of I-steel on, second splint hug closely another lateral wall of I-steel on, first splint with the second splint between be connected through many movable screw rods, many movable screw rod equipartition be in the both sides of I-steel, movable screw rod one end with the roof be connected, movable screw rod the other end with movable mould board be connected, movable screw rod on still the spiro union have first bolt, second bolt and third bolt, first bolt hug closely first splint on, the second bolt hug closely second splint on, the third bolt hug closely movable mould board on.
2. The supporting deformation adjusting device for the steel arch of the tunnel according to claim 1, wherein: the first frame by first bottom plate with fix first bottom plate on three first curb plates constitute, first bottom plate fix the I-steel on, three first curb plates be located respectively on three sides of first bottom plate, and connect gradually, every first curb plate on seted up at least one first spacing groove, the second frame by the second bottom plate with fix the second bottom plate on three second curb plates constitute, the second bottom plate fix the I-steel on, three the second curb plate be located respectively on the three sides of second bottom plate, and connect gradually, every the second curb plate on seted up at least one with the corresponding second spacing groove of first spacing groove, just first spacing groove with correspond the second spacing groove between be connected with a movable spacer pin.
3. The tunnel steel arch support deformation adjusting device according to claim 2, wherein: first splint with the second splint between still be connected with many and decide the screw rod, many decide the screw rod equipartition and be in the both sides of I-steel, the fixed die plate pass through the locking bolt to be fixed decide on the screw rod.
4. A method for adjusting support deformation of a tunnel steel arch is characterized by comprising the following steps: the tunnel steel arch support deformation adjusting apparatus according to claim 3, comprising the steps of:
s1: after tunnel excavation is finished, assembling multiple sections of I-shaped steel into an arch supporting structure which is adaptive to the tunnel excavation outline, and preliminarily controlling the deformation of surrounding rocks;
s2: controlling the second jack to stop working after the top plate is contacted with the bottom of the surrounding rock cavity;
s3: adjusting the first bolt and the second bolt, and fixing the movable screw rod with the first clamping plate and the second clamping plate;
s4: loosening the locking bolt, and dismantling the fixed screw rod, the fixed template and the second jack;
s5: synchronously adjusting the first jacks, acquiring the deformation condition of the surrounding rock through displacement sensors arranged at different positions outside the arch supporting structure, and stopping the first jacks when the deformation of the surrounding rock is uniform;
s6: adjusting the spiral anchoring piece to anchor the two adjacent sections of I-shaped steel;
s7: taking out the first jack, spraying anchor support concrete into the first frame and the second frame, and curing to the age so as to ensure the uniformity and safety of the deformation of the surrounding rock;
s8: and repeating S1-S7 until the top plates on all the section I-steel are contacted with the bottom of the surrounding rock cavity, and finishing the adjustment of the whole section of tunnel, thereby being beneficial to advancing and excavating the subsequent section of tunnel.
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| IT202200001559A1 (en) * | 2022-01-31 | 2023-07-31 | Officine Maccaferri Italia S R L | Support rib for an excavation, with control of the thrust exerted by the walls of the excavation |
| CN114320380B (en) * | 2021-11-30 | 2023-10-27 | 云南省建筑科学研究院有限公司 | Adjustable connecting device for tunnel supporting frame and construction method thereof |
| CN115680723A (en) * | 2022-11-21 | 2023-02-03 | 浙大城市学院 | Telescopic device and annular telescopic tunnel steel arch frame |
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| GB2223044A (en) * | 1988-09-22 | 1990-03-28 | Coal Ind | Setting mine roof arches |
| CN101037944A (en) * | 2007-04-27 | 2007-09-19 | 惠中华 | Shallow buried and underground excavated engineering project execution method and equipment thereof |
| CN102628368A (en) * | 2012-04-26 | 2012-08-08 | 李信斌 | Tunnel self-advancing support shed |
| CN108150200A (en) * | 2018-01-18 | 2018-06-12 | 西南石油大学 | A kind of support of tunnel arch and application method |
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