CN209654056U - A kind of limit energy absorption device and system for arch top in tunnel - Google Patents
A kind of limit energy absorption device and system for arch top in tunnel Download PDFInfo
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- CN209654056U CN209654056U CN201920086027.5U CN201920086027U CN209654056U CN 209654056 U CN209654056 U CN 209654056U CN 201920086027 U CN201920086027 U CN 201920086027U CN 209654056 U CN209654056 U CN 209654056U
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Abstract
A kind of limit energy absorption device and system for arch top in tunnel of the utility model belongs to underground engineering field, a kind of limit energy absorption device for arch top in tunnel provided by the utility model, which is characterized in that including the first connecting plate；Second connecting plate；Elastic portion, the elastic portion are located between the first connecting plate and the second connecting plate；Guide part, the guide part are located between the first connecting plate and the second connecting plate；First connecting plate is parallel with the second connecting plate, and the first connecting plate and the second connecting plate are slidably connected with the guide part respectively；The compression direction of the elastic portion is identical along the glide direction of the guide part as the first connecting plate and the second connecting plate, it ensure that the globality and stability of the connected both ends arch stress of limit energy absorption device, so that the stability of tunnel cavern is further promoted with safety, the utility model structure simple structure, it is easy for installation and practical, it can effectively promote the globality and stability of tunnel cavern.
Description
Technical field
The utility model belongs to underground engineering field, and in particular to a kind of limit energy-absorbing dress for arch top in tunnel
It sets and system.
Background technique
In recent years, although China's Tunnel Engineering construction technique in the continuous improvement with development, in process of construction according to
So it is faced with the problem of wall rock destabilization cavern collapses.In the uncomplicated situation of geological conditions, tunnel is in construction process, generally
By reinforcing excavation face and peripheral rock, lining cutting is performed in time, can achieve the purpose that cavern is stable, and can guarantee that the later period uses
Safety.
But geological condition is complicated, soil layer is weak, high-ground stress, cavern's bias builds tunnel under the conditions of seriously waiting, when
Lining cutting is not able to satisfy its caused deformation requirements during country rock releases stress, easily cause the deformation of lining cutting, cracking,
The danger such as collapsing.For high ground stress soft rock stress tunnel, under the effect of ultrahigh water concora crush power, tunnel deformation is inwardly received in two abutment walls
It holds back, the extruded deformation behaviour of vault, deformation is heavy then lead to steel arch as shown in Figure 1, gently then cause concrete cracking, peel off
Frame surrender, unstability, it is serious to cause the major disasters such as tunnel cave, pass through technological improvement in the prior art, it is already possible to
Solve the problems, such as the transverse pressure toe-in of steel arch-shelf two sides in Fig. 1.
Inventor has found at least to have the following deficiencies: in background technique during realizing the utility model embodiment
Under the uneven load action of country rock, it is especially in the presence of under local wall rock destabilization pressure effect, as shown in Fig. 2, tunnel
Steel arch-shelf stress deformation at road vault is as shown in figure 4, left transverse pressure 62 and right transverse pressure 63 act on one group of steel arch-shelf
Two sides, vertical pressure 61 is directly by steel arch-shelf load-bearing, and steel arch-shelf can shear change if by unbalanced vertical pressure 61
Shape, steel arch-shelf under the action of vertical pressure 61,62 right transverse pressure 63 of left transverse pressure, in two one group of steel arch-shelf two
Side causes one group of steel arch-shelf to generate compression and shear-deformable, when vertical pressure there are normal direction compression and two kinds of tangential changing of the relative positions displacements
When power 61 is excessive, two one group of steel arch-shelf causes just branch steelframe center line easily because of unbalanced deformation caused by failure by shear
Not in tunnel arch camber line position, and the failure of steelframe unstability occurs, influences cavern's overall stability.
Utility model content
The utility model provides a kind of limit energy absorption device for arch top in tunnel, it is therefore intended that solves above-mentioned
Problem solves one group of steel arch-shelf because of unbalanced deformation caused by failure by shear, cause just branch steelframe center line not in tunnel arch camber
Line position, and the failure of steelframe unstability occurs, the problem of influencing cavern's overall stability.
To achieve the above object, the technical solution adopted in the utility model is as follows:
A kind of limit energy absorption device for arch top in tunnel, including
First connecting plate；
Second connecting plate；
Elastic portion, the elastic portion are located between the first connecting plate and the second connecting plate；
Guide part, the guide part are located between the first connecting plate and the second connecting plate；
First connecting plate is parallel with the second connecting plate, and the first connecting plate and the second connecting plate are sliding with the guide part respectively
Dynamic connection；The glide direction phase of the compression direction of the elastic portion and the first connecting plate and the second connecting plate along the guide part
Together.
The guide part is guiding screw pole, has the first guide through hole on the first connecting plate, have on the second connecting plate with
The second coaxial guide through hole of first guide through hole, guiding screw pole protrude into simultaneously and are located at first guide through hole and institute
It states in the second guide through hole；
What the guiding screw pole stretched out first guide through hole or the second guide through hole is located at the first connecting plate and second
The end of guiding screw pole outside connecting plate is equipped with the limiting section for preventing guiding screw pole end from retracting to its other end.
The elastic portion is compressed spring, and compressed spring covers on guiding screw pole and be located at the first connecting plate and the second connection
Between plate.
First connecting plate and the second connecting plate are the first branch arch connecting plate on two pairs of arches.
First connecting plate and the second connecting plate are respectively fixedly connected with to be used to fix the first company on two pairs of arches
Fishplate bar or the second connecting plate simultaneously have on the first branch arch connecting plate of through-hole corresponding with the first connecting plate or the second connecting plate.
The elastic portion and the guide part are multiple groups, and the elastic portion and the guide part are uniformly distributed in the first company
Between fishplate bar and the second connecting plate, the axial direction of the guide part of multiple groups is parallel.
It further include arch and first branch arch connecting plate, the arch is fixedly connected with first branch arch connecting plate, the arch
There is L shape side weldering stiffener between the just branch arch connecting plate, the arch by L shape side weldering stiffener with it is described
First branch arch connecting plate reinforces connection.
There is stiffener mesh sheet, stiffener mesh sheet is located on arch at the top of first connecting plate and the second connecting plate
Hold the tunnel shotcrete layer on palisades；
First connecting plate or the second connecting plate two sides have hook-shaped connection reinforcing bar, and the first connecting plate or the second connecting plate pass through
Hook-shaped connection reinforcing bar is fixedly connected with tunnel shotcrete layer；
Guiding screw pole and first guide through hole or the second guide through hole clearance fit；
The limiting section is nut, the nut and the end for being located at the first connecting plate and the guiding screw pole outside the second connecting plate
Portion's screwed connection；
The quantity of the guiding screw pole is n, n=Fs/(A × ftb), and wherein Fs is that perpendicular acting is perpendicular on guiding screw pole
To shearing, A is the cross-sectional area of the single guiding screw pole, and ftb designs shearing strength for guiding screw pole；
The compressed spring quantity is m, m=FN/(K × δ), in which: FN is steel arch at the vault caused by surrouding rock deformation
Frame internal force, K are the compression stiffness of compressed spring, and δ is the design variations allowance of device.
A kind of limit energy absorption device for arch top in tunnel, for the arch top in the tunnel with lateral extrusion
End, comprising:
A kind of above-mentioned limit energy absorption device for arch top in tunnel；
First arch, have on the first arch first just branch arch connecting plate or first just branch arch connecting plate be first to connect
Fishplate bar；
Second arch, have on the second arch second just branch arch connecting plate or second just branch arch connecting plate be second to connect
Fishplate bar；
First connecting plate is fixed on the first first branch arch connecting plate or the first connecting plate is fixed at the top of the first arch, and second
Arch be fixed on second just branch arch connecting plate or second just branch arch connecting plate be fixed at the top of the second arch, the first arch and
Second arch is one group of pairs of arch.
A kind of limit absorption systems, for the arch top in the tunnel with lateral extrusion, comprising:
First connecting plate, the first connecting plate have multiple groups, the connection of multiple groups the first connecting plate head and the tail integral type；
Second connecting plate, the second connecting plate have multiple groups, the connection of multiple groups the second connecting plate head and the tail integral type；
Elastic portion, the elastic portion have multiple groups and are uniformly located between the first connecting plate and the second connecting plate；
Guide part, the guide part have multiple groups and are uniformly located between the first connecting plate and the second connecting plate；
First connecting plate of multiple groups integral type connection is parallel with the second connecting plate that multiple groups integral type connects, and the first connection
Plate and the second connecting plate are slidably connected with the guide part respectively；The axial direction of the guide part of multiple groups is parallel；Multiple groups
The elastic portion compression direction it is identical along the glide direction of the guide part as the first connecting plate and the second connecting plate.
The utility model has the beneficial effects that being become by the elastic portion compression being arranged in the limit energy absorption device at vault
Release pressure from surrounding rock may be implemented in shape, and guide part can carry out guiding role to one group of steel arch-shelf, so that steel arch-shelf is cut
Cutting through bad when balanced can still deform, and first branch steelframe centerline is in tunnel arch camber line position, to ensure that limit energy-absorbing dress
The globality and stability of connected both ends arch stress are set, so that the stability of tunnel cavern and safety are obtained into one
The promotion of step, the utility model structure simple structure is easy for installation and practical, can effectively promote the entirety of tunnel cavern
Property and stability.
Detailed description of the invention
Fig. 1 is tunnel arch by balanced horizontal compression deformation schematic diagram；
Fig. 2 is tunnel arch by unbalanced horizontal compression deformation schematic diagram；
Fig. 3 is that tunnel limits the ideal convergent deformation schematic diagram after energy absorption device using the utility model；
Fig. 4 is changed into Fig. 3 state stress and shear-deformable schematic diagram from Fig. 2 state for steel arch-shelf；
Fig. 5 is the overall structure figure of an embodiment of the present invention；
Fig. 6 is the overall structure diagram that another embodiment of the utility model is connect with steel arch-shelf；
Fig. 7 is the lateral incision diagram of Fig. 4；
Fig. 8 is in an embodiment of the present invention, and one group of steel arch-shelf another group of steel arch-shelf adjacent thereto is connected
Top view；
Fig. 9 is the front view of Fig. 6.
In the figure, it is marked as the 1, first connecting plate；2, guiding screw pole；3, limiting section；4, compressed spring；5, the first guiding is logical
Hole；6, the second guide through hole；7, bolt is installed；8, the second arch；9；Second first branch arch connecting plate；10, the second connecting plate；
11, stiffener mesh sheet；12, country rock；13, L shape side weldering stiffener；14, connecting plate link bolt hole；15, hook-shaped connection steel
Muscle；16, connecting plate connects bolt；17, the first arch；18, the first first branch arch connecting plate；19, tunnel shotcrete layer.
Specific embodiment
Firstly the need of explanation, in each embodiment of the utility model, related term are as follows:
First connecting plate 1 and the second connecting plate 10 limit the outer part of energy absorption device for the utility model, and first connects
Fishplate bar 1 and the second connecting plate 10 can be located in tunnel between steel arch-shelf and tunnel shotcrete layer 19, be separately connected in tunnel
Steel arch-shelf and tunnel shotcrete layer；
First connecting plate 1 and the second connecting plate 10 may be located at one in tunnel group of steel arch-shelf tip clearance, be used for
It is connected to the gap location on one group of steel arch-shelf top in tunnel, the first connecting plate 1 and the second connecting plate 10 are separately connected one group
Two steel arch-shelfs.
Elastic portion is compression spring, can be disc spring, coil-type compression springs or compression deformed spring etc..
Guide part, guide part can force the component being slidably connected with it, and radially direction is mobile, can be rod-shaped, long
Strip, it is band-like, can mutually cooperate sliding grab shape or rail-like etc..
Limiting section, can be protrusion or nut, and the limiting section in the application is to be set to guide part both ends and prevent the
When one connecting plate 1 or the second connecting plate 10 are slided to outside guide part, the first connecting plate 1 or the second connecting plate 10 skid off guide part.
In attached drawing 1, country rock two sides have country rock vertical pressure 31, the left country rock side pressure horizontal pressure force 32, right country rock of side pressure
After side pressure horizontal pressure force 33 and country rock two sides have 34 collective effect of country rock base pressure of side pressure, make steel arch-shelf i.e. Fig. 1
Middle dotted portion deformation.
In attached drawing 2, country rock two sides have the vertical bias pressure 41 of country rock of bias, left country rock horzontal deflecting voltage pressure 42, a left side
After country rock horzontal deflecting voltage pressure 43 and country rock two sides have 44 collective effect of country rock base pressure of bias, make steel arch-shelf namely
Dotted portion deforms in Fig. 2.
In attached drawing 3, country rock has the horizontal equalizing pressure 52 of country rock vertical pressure 51, left country rock pressed, right country rock horizontal
After equalizing pressure 53 and country rock two sides have 54 collective effect of country rock base pressure pressed, make empty in steel arch-shelf i.e. Fig. 3
The deformation of line part.
In attached drawing 4, left side is the equilibrium state of steel arch-shelf in normal tunnel and right side by tunnel after unbalanced shearing force
The imbalance after shear-deformable 60 occurs for steel arch-shelf in road.
In the following, will be carried out by several specific embodiments to limit energy-absorbing scheme provided by the embodiment of the utility model detailed
It is thin to introduce explanation.
Referring to FIG. 5, it illustrates a kind of limits for arch top in tunnel that an embodiment of the present invention provides
The overall schematic of position energy absorption device, the limit energy absorption device, including
First connecting plate 1；
Second connecting plate 10；
Elastic portion, the elastic portion are located between the first connecting plate 1 and the second connecting plate 10；
Guide part, the guide part are located between the first connecting plate 1 and the second connecting plate 10；
First connecting plate 1 is parallel with the second connecting plate 10, and the first connecting plate 1 and the second connecting plate 10 are led with described respectively
It is slidably connected to portion；The cunning of the compression direction of the elastic portion and the first connecting plate 1 and the second connecting plate 10 along the guide part
Dynamic direction is identical.
In above-described embodiment, the first connecting plate 1 and the second connecting plate 10 are slidably connected with guide part, and the work of guide part
With in the first connecting plate 1 and the second connecting plate 10 respectively by opposite pressure when, no matter the first connecting plate 1 and the second connection
Plate 10 can or can not again by the shearing force perpendicular to above-mentioned opposite pressure when, the first connecting plate 1 and the second connecting plate 10 can be along
The radial direction of guide part is mobile, and guide part makes the first connecting plate 1 and the second connecting plate 10 will not by the movement after shearing force
Dislocation, the work that then elastic portion can also be more stable, the phase that stable buffering the first connecting plate 1 and the second connecting plate 10 are subject to
To power.
Further, Fig. 5 to Fig. 6 is please referred to, it illustrates a kind of limits for arch top in tunnel of the utility model
Another embodiment of position energy absorption device, the guide part are guiding screw pole 2, have the first guide through hole 5 on the first connecting plate 1,
There is second guide through hole 6 coaxial with first guide through hole 5, guiding screw pole 2 protrudes into simultaneously simultaneously on second connecting plate 10
In first guide through hole 5 and second guide through hole 6；
In above-described embodiment, guide part uses guiding screw pole 2, and has the first guide through hole 5 on the first connecting plate 1,
There is second guide through hole 6 coaxial with first guide through hole 5, guiding screw pole 2 can need not be fixed on second connecting plate 10
In on a firm object, the first connecting plate 1, the second connecting plate 10 and guiding screw pole 2 and the first coaxial guide through hole 5 and the
Two guide through hole 6 constitute stable guidance system, slide in opposition the first connecting plate 1 and the second connecting plate 10 stabilization.
Further, Fig. 5 to Fig. 6 is please referred to, it illustrates a kind of limits for arch top in tunnel of the utility model
Another embodiment of position energy absorption device, the guiding screw pole 2 stretch out the position of first guide through hole 5 or the second guide through hole 6
In the end of the guiding screw pole 2 outside the first connecting plate 1 and the second connecting plate 10 be equipped with for prevent guiding screw pole end to its
The limiting section 3 that the other end retracts.
In above-described embodiment, the end of guiding screw pole 2 is equipped with limiting section 3, for preventing the first connecting plate 1 or the second connection
When plate 10 is slided to outside guide part, the first connecting plate 1 or the second connecting plate 10 skid off guide part, are also possible to prevent guiding screw pole 2
When being shaken, guiding screw pole 2 shakes the through-hole on the first connecting plate 1 out or the second connecting plate 10, prevents the first connecting plate 1,
The failure of guidance system composed by two connecting plates 10 and guiding screw pole 2.
Further, Fig. 5 to Fig. 6 is please referred to, it illustrates a kind of limits for arch top in tunnel of the utility model
Another embodiment of position energy absorption device, the elastic portion are compressed spring 4, and 4 sets of compressed spring on guiding screw pole 2 and are located at the
Between one connecting plate 1 and the second connecting plate 10.
In above-described embodiment, elastic portion is set as compressed spring 4, and compressed spring 4 selects helical spring, helical spring install to
Between first connecting plate 1 and the second connecting plate 10, guiding screw pole 2 is logical from helical spring and the first guide through hole 5 and the second guiding
It is passed through in hole 6, the diameter of guiding screw pole 2 is slightly less than the diameter of the first guide through hole 5 and the second guide through hole 6, works as helical spring
When by the bias compressive deformation of the first connecting plate 1 and the second connecting plate 10, guiding screw pole 2 begins the deformation direction of helical spring
It is limited to the glide direction perpendicular to the first connecting plate 1 and the second connecting plate 10 eventually, it is more stable when making helical spring deformation, prevent
Stop that it is surprisingly popped up or when helical spring is connect with the first connecting plate 1 and the second connecting plate 10, helical spring is due to unstable
And it fails.
Guiding screw pole 2 not only acts as the effect of connection the first connecting plate 1 and the second connecting plate 10, also acts restriction compression
The effect of 4 deformation direction of spring prevents from occurring under bias the deformation that misplaces between the first connecting plate 1 and the second connecting plate 10
The deformation failure for causing limit energy absorption device disabler and just claiming.
Further, a kind of another embodiment for the limit energy absorption device on arch top in tunnel of the utility model,
First connecting plate 1 and the second connecting plate 10 are the first branch arch connecting plate on two pairs of arches.
In above-described embodiment, due to having first branch arch connecting plate on one group of steel arch-shelf in tunnel in the prior art, and
First branch arch connecting plate can replace first connecting plate 1 and the second connecting plate 10 of the utility model, directly be encircleed using first branch
Frame connecting plate can save the cost of the present apparatus using existing component, keep the utility model inexpensive, greatly enhance the practicality.
Further, such as Fig. 5 to Fig. 7, it illustrates a kind of limit suctions for arch top in tunnel of the utility model
Another embodiment of energy device, first connecting plate 1 and the second connecting plate 10 are respectively fixedly connected on two pairs of arches
For fixing the first connecting plate or the second connecting plate and the first branch with through-hole corresponding with the first connecting plate or the second connecting plate is encircleed
On frame connecting plate.
In above-described embodiment, a kind of limit energy absorption device for arch top in tunnel of the utility model is using factory dress
The single piece prepared, as the energy-absorbing limiting device on 8 top of the first arch 17 and the second arch, the first arch 17 and the second arch
Directly unitarily formed limit energy absorption device can be placed between the first arch 17 and the second arch 8 when 8 assembly, assembly is fixed,
It can substantially save between the first arch 17 and the second arch 8 and stablize allotment work, make the dress of the first arch 17 and the second arch 8
With more rapid, construction progress, lifting construction efficiency can be accelerated, and then reduce construction cost；
In the present embodiment, the first branch arch connecting plate needs on the first arch 17 and the second arch 8 are accomplished fluently thereon in advance
The first connecting plate 1 or the corresponding through-hole of the second connecting plate 10 of installation and the hole of installation bolt 7, installation bolt 7 is for fixing
First branch arch connecting plate and the first connecting plate 1 or the second connecting plate 10.
Further, a kind of another embodiment for the limit energy absorption device on arch top in tunnel of the utility model,
The elastic portion and the guide part are multiple groups, and the elastic portion and the guide part are uniformly distributed in 1 He of the first connecting plate
Between second connecting plate 10, the axial direction of the guide part of multiple groups is parallel.
In above-described embodiment, the guide part between the first connecting plate 1 and the second connecting plate 10 needs to be arranged equally distributed
Multiple groups, to bear suppressing in tunnel, at this time in order to keep the first connecting plate 1 and the second connecting plate 10 same as multiple groups guide part
Composition can stablize the sliding system slid in opposition, and the axial direction needs of multiple groups guide part are arranged in parallel, so that first connects
Fishplate bar 1 and the second connecting plate 10 are not stuck.
Further, as shown in Figure 6 to 7, it illustrates a kind of limits for arch top in tunnel of the utility model
Another embodiment of position energy absorption device, further includes arch and first branch arch connecting plate, and the arch and first branch arch connecting plate are solid
Fixed connection, has L shape side weldering stiffener 13 between the arch and the just branch arch connecting plate, the arch passes through L shape
Side weldering stiffener 13 and the just branch arch connecting plate are reinforced and are connected.
In above-described embodiment, first branch arch connecting plate is fixedly connected with face two sides with steel arch-shelf using L shape side weldering stiffener
13 enhancing connection effects.
Further, as shown in fig. 6, it illustrates a kind of limit energy-absorbings for arch top in tunnel of the utility model
There is stiffener mesh sheet 11, stiffener at the top of another embodiment of device, first connecting plate 1 and the second connecting plate 10
Mesh sheet 11 is located at the tunnel shotcrete layer 19 on the palisades of arch upper end；
In above-described embodiment, stiffener mesh sheet is set in the tunnel shotcrete layer 19 between steel arch-shelf and country rock 12
11, enhance the cracking resistance of tunnel shotcrete layer 19 and is evenly distributed on the vertical pressure that the country rock 12 is discharged
On steel arch-shelf, and then uniformly pass to the first connecting plate 1 and the second connecting plate 10.
Further, as shown in figure 8, it illustrates a kind of limit energy-absorbings for arch top in tunnel of the utility model
Another embodiment of device, the first connecting plate 1 or 10 two sides of the second connecting plate have hook-shaped connection reinforcing bar 15, the first connecting plate 1
Or second connecting plate 10 be fixedly connected with tunnel shotcrete layer 19 by hook-shaped connection reinforcing bar 15；
In above-described embodiment, hook-shaped connection reinforcing bar 15 enhances the first connecting plate 1 and the second connecting plate 10 and tunnel injection is mixed
The connectivity and globality of solidifying soil layer 19.
Further, a kind of another embodiment for the limit energy absorption device on arch top in tunnel of the utility model,
Guiding screw pole 2 and first guide through hole 5 or 6 clearance fit of the second guide through hole；
In above-described embodiment, 6 clearance fit of guiding screw pole 2 and the first guide through hole 5 or the second guide through hole, transition fit
Or the diameter opposite with guiding screw pole 2 according to material property the first guide through hole 5 of promotion and the second guide through hole 6, guiding screw pole 2
Diameter less than through-hole connected to it on the first connecting plate 1 and the second connecting plate 10, allow to be oriented to, and adjust guiding
The difference of relative diameter can further adjust the first connecting plate 1 between stud 2 and the first guide through hole 5 and the second guide through hole 6
Or second connecting plate 10 and guiding screw pole 2 frictional force, frictional force further functions as the effect of elastic portion, can be saved by design
The use number of elastic portion is saved, cost is saved.
Further, as shown in Figure 5 to Figure 6, it illustrates a kind of limits for arch top in tunnel of the utility model
Another embodiment of position energy absorption device, the limiting section 3 are nut, and the nut is connect with the first connecting plate 1 and second is located at
The end screwed connection of guiding screw pole 2 outside plate 10；
In above-described embodiment, using the nut with 2 screwed connection of guiding screw pole, installation that can be more convenient limits limiting section 3
Position portion 3, when site operation, are more quick, convenient.
Further, a kind of another embodiment for the limit energy absorption device on arch top in tunnel of the utility model,
The quantity of the guiding screw pole 2 is n, n=Fs /(A×ft b), wherein FsFor vertical shear of the perpendicular acting on guiding screw pole 2, A
For the cross-sectional area of the single guiding screw pole 2, ft bShearing strength is designed for guiding screw pole 2；4 quantity of compressed spring
For m, m=FN/ (K × δ), in which: FNFor steel arch-shelf internal force at the vault caused by surrouding rock deformation, K is the compression of compressed spring 4
Rigidity, δ are the design variations allowance of device.
In above-described embodiment, the quantity of compressed spring 4 and guiding screw pole 2 can be calculated respectively by calculating, and then for existing
When the construction of field, the quantity of compressed spring 4 and guiding screw pole 2 is calculated for institute's construction tunnel, limits energy-absorbing dress for the utility model
The number of components set carries out basic preparation, scientific construction.
Referring to FIG. 6, the utility model discloses a kind of limit for the arch top in the tunnel with lateral extrusion
Position one embodiment of absorption systems, the limit absorption systems include:
First connecting plate 1；
Second connecting plate 10；
Elastic portion, the elastic portion are located between the first connecting plate 1 and the second connecting plate 10；
Guide part, the guide part are located between the first connecting plate 1 and the second connecting plate 10；
First connecting plate 1 is parallel with the second connecting plate 10, and the first connecting plate 1 and the second connecting plate 10 are led with described respectively
It is slidably connected to portion；The cunning of the compression direction of the elastic portion and the first connecting plate 1 and the second connecting plate 10 along the guide part
Dynamic direction is identical；
First arch 17 has the first just branch arch connecting plate 18 or the first first branch arch connecting plate 18 on first arch 17
For the first connecting plate 1；
Second arch 8, have on the second arch 8 second just branch arch connecting plate 9 or second just branch arch connecting plate 9 be the
Two connecting plates 10；
First connecting plate 1 is fixed on first, and just branch arch connecting plate 18 or the first connecting plate 1 are fixed on the first arch 17 top
Portion, the second arch 8 is fixed on second, and just branch arch connecting plate 9 or the second first branch arch connecting plate 9 are fixed on the second arch 8 top
Portion, the first arch 17 and the second arch 8 are one group of pairs of arch.
In above-described embodiment, the first connecting plate 1 and the second connecting plate 10 are slidably connected with guide part, and the work of guide part
With in the first connecting plate 1 and the second connecting plate 10 respectively by opposite pressure when, no matter the first connecting plate 1 and the second connection
Plate 10 can or can not again by the shearing force perpendicular to above-mentioned opposite pressure when, the first connecting plate 1 and the second connecting plate 10 can be along
The radial direction of guide part is mobile, and guide part makes the first connecting plate 1 and the second connecting plate 10 will not by the movement after shearing force
Dislocation, the work that then elastic portion can also be more stable, the phase that stable buffering the first connecting plate 1 and the second connecting plate 10 are subject to
To power.Pairs of one group of arch and limit energy absorption device constitute stable gantry system.
Fig. 8 to Fig. 9 is please referred to, the utility model is disclosed for the another of the arch top in the tunnel with lateral extrusion
A kind of one embodiment of limit absorption systems, the limit absorption systems include: the first connecting plate 1, and the first connecting plate 1 has multiple groups,
The connection of 1 head and the tail integral type of the first connecting plate of multiple groups；
Second connecting plate 10, the second connecting plate 10 have multiple groups, the connection of 10 head and the tail integral type of the second connecting plate of multiple groups；
Elastic portion, the elastic portion have multiple groups and are uniformly located between the first connecting plate 1 and the second connecting plate 10；
Guide part, the guide part have multiple groups and are uniformly located between the first connecting plate 1 and the second connecting plate 10；
First connecting plate 1 of multiple groups integral type connection is parallel with the second connecting plate 10 that multiple groups integral type connects, and first
Connecting plate 1 and the second connecting plate 10 are slidably connected with the guide part respectively；The axial direction of the guide part of multiple groups is flat
Row；The compression direction of the elastic portion of multiple groups is with the first connecting plate 1 and the second connecting plate 10 along the sliding of the guide part
Direction is identical.
Optionally, the first connecting plate 1 or the second connecting plate 10 connect spiral shell with connecting plate by connecting plate link bolt hole 14
The connection of 16 integral type of bolt.
In above-described embodiment, pass through the first connecting plate of the multiple groups integral type connection being fixed to each other between adjacent steel arch-shelf
1 the second connecting plate 10 connected with multiple groups integral type connects steel arch-shelfs all in tunnel, makes all steel arch-shelf compositions in tunnel
It is whole, make in the prior art, one group of steel arch-shelf, which individually undertakes pressure in one section of tunnel, becomes the steel arch of one group steel arch-shelf two sides
Frame shares the load-bearing of one group of steel arch-shelf simultaneously, avoids single group arch and individually undertakes one section of excessive situation of tunnel pressure, makes
Tunnel is more stable.
The utility model can be used between steel arch-shelf and tunnel shotcrete layer, and major function is for one group of steel arch
The top clearance position of frame, the shearing force that steel arch-shelf is generated when buffering tunnel inner top pressure is unbalanced, it is ensured that steel arch-shelf pair
The normal load-bearing in tunnel.
It is to be appreciated that the directional instruction (such as up, down, left, right, before and after ...) of institute is only used for solving in the present embodiment
It releases in relative positional relationship, the motion conditions etc. under a certain particular pose (as shown in the picture) between each component, if this is specific
When posture changes, then directionality instruction also correspondingly changes correspondingly.
In addition, the description for being related to " first ", " second " etc. is used for description purposes only, it is not understood to indicate or imply it
Relative importance or the quantity for implicitly indicating indicated technical characteristic.Define " first " as a result, the feature of " second " can
To explicitly or implicitly include at least one this feature.
Technical solution between each embodiment can be combined with each other, but must be with those of ordinary skill in the art's energy
It is enough realize based on, will be understood that the knot of this technical solution when conflicting or cannot achieve when occurs in the combination of technical solution
Conjunction is not present, also not within the protection scope of the requires of the utility model.
Claims (10)
1. a kind of limit energy absorption device for arch top in tunnel, which is characterized in that including
First connecting plate (1)；
Second connecting plate (10)；
Elastic portion, the elastic portion are located between the first connecting plate (1) and the second connecting plate (10)；
Guide part, the guide part are located between the first connecting plate (1) and the second connecting plate (10)；
First connecting plate (1) is parallel with the second connecting plate (10), and the first connecting plate (1) and the second connecting plate (10) respectively with institute
Guide part is stated to be slidably connected；The compression direction of the elastic portion is led with the first connecting plate (1) and the second connecting plate (10) along described
Glide direction to portion is identical.
2. a kind of limit energy absorption device for arch top in tunnel as described in claim 1, which is characterized in that the guiding
Portion is guiding screw pole (2), has the first guide through hole on the first connecting plate (1), is had on the second connecting plate (10) and described the
The second coaxial guide through hole of one guide through hole, guiding screw pole (2) protrude into simultaneously and positioned at first guide through hole and described
In second guide through hole；
The guiding screw pole (2) stretches out being located at of first guide through hole or the second guide through hole the first connecting plate (1) and the
The end of the guiding screw pole (2) of two connecting plates (10) outside is equipped with the limit for preventing guiding screw pole end from retracting to its other end
Position portion (3).
3. a kind of limit energy absorption device for arch top in tunnel as claimed in claim 2, which is characterized in that the elasticity
Portion is compressed spring (4), and compressed spring (4) covers on guiding screw pole (2) and is located at the first connecting plate (1) and the second connecting plate
(10) between.
4. a kind of limit energy absorption device for arch top in tunnel as described in claim 1, which is characterized in that described first
Connecting plate (1) and the second connecting plate (10) are the first branch arch connecting plate on two pairs of arches.
5. a kind of limit energy absorption device for arch top in tunnel as claimed in claim 3, which is characterized in that described first
Connecting plate (1) and the second connecting plate (10) are respectively fixedly connected with to be used to fix the first connecting plate or second on two pairs of arches
Connecting plate simultaneously has on the first branch arch connecting plate of through-hole corresponding with the first connecting plate or the second connecting plate.
6. a kind of limit energy absorption device for arch top in tunnel, feature exist as described in claim 1-4 any one
In the elastic portion and the guide part are multiple groups, and the elastic portion and the guide part are uniformly distributed in the first connecting plate
(1) between the second connecting plate (10), the axial direction of the guide part of multiple groups is parallel.
7. a kind of limit energy absorption device for arch top in tunnel as claimed in claim 5, which is characterized in that further include arch
Frame and first branch arch connecting plate, the arch are fixedly connected with first branch arch connecting plate, and the arch and the just branch arch connect
There is L shape side weldering stiffener (13), the arch passes through L shape side weldering stiffener (13) and the just branch arch between fishplate bar
Connecting plate reinforces connection.
8. a kind of limit energy absorption device for arch top in tunnel as claimed in claim 7, which is characterized in that described first
There are stiffener mesh sheet (11) at the top of connecting plate (1) and the second connecting plate (10), stiffener mesh sheet (11) is located on arch
Hold the tunnel shotcrete layer (19) on palisades；
First connecting plate (1) or the second connecting plate (10) two sides have hook-shaped connection reinforcing bar (15), the first connecting plate (1) or second
Connecting plate (10) is fixedly connected by hook-shaped connection reinforcing bar (15) with tunnel shotcrete layer (19)；
Guiding screw pole (2) and first guide through hole or the second guide through hole clearance fit；
The limiting section (3) be nut, the nut be located at the guiding spiral shell of the first connecting plate (1) and the second connecting plate (10) outside
The end screwed connection of column (2)；
The quantity of the guiding screw pole (2) is n, n=Fs /(A×ft b), wherein FsIt is perpendicular acting perpendicular on guiding screw pole (2)
To shearing, A is the cross-sectional area of the single guiding screw pole (2), ft bShearing strength is designed for guiding screw pole (2)；
Compressed spring (4) quantity is m, m=FN/ (K × δ), in which: FNFor steel arch-shelf at the vault caused by surrouding rock deformation
Internal force, K are the compression stiffness of compressed spring (4), and δ is the design variations allowance of device.
9. a kind of limit absorption systems, for the arch top in the tunnel with lateral extrusion characterized by comprising
Including a kind of limit energy absorption device for arch top in tunnel described in claim 1；
First arch (17) has the first just branch arch connecting plate (18) or the first first branch arch connecting plate on the first arch (17)
(18) it is the first connecting plate (1)；
Second arch (8) has the second just branch arch connecting plate (9) or the second first branch arch connecting plate (9) on the second arch (8)
For the second connecting plate (10)；
First connecting plate (1) is fixed on first, and just branch arch connecting plate (18) or the first connecting plate (1) are fixed on the first arch
(17) top, the second arch (8) is fixed on second, and just branch arch connecting plate (9) or the second first branch arch connecting plate (9) are fixed on
At the top of second arch (8), the first arch (17) and the second arch (8) are one group of pairs of arch.
10. a kind of limit absorption systems, for the arch top in the tunnel with lateral extrusion characterized by comprising
First connecting plate (1), the first connecting plate (1) have multiple groups, the connection of the first connecting plate of multiple groups (1) head and the tail integral type；
Second connecting plate (10), the second connecting plate (10) have multiple groups, the connection of the second connecting plate of multiple groups (10) head and the tail integral type；
Elastic portion, the elastic portion have multiple groups and are uniformly located between the first connecting plate (1) and the second connecting plate (10)；
Guide part, the guide part have multiple groups and are uniformly located between the first connecting plate (1) and the second connecting plate (10)；
The first connecting plate (1) of multiple groups integral type connection is parallel with the second connecting plate (10) that multiple groups integral type connects, and first
Connecting plate (1) and the second connecting plate (10) are slidably connected with the guide part respectively；The axial direction of the guide part of multiple groups
It is parallel；The compression direction of the elastic portion of multiple groups is with the first connecting plate (1) and the second connecting plate (10) along the guiding
The glide direction in portion is identical.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111219199A (en) * | 2020-01-14 | 2020-06-02 | 中国建筑第五工程局有限公司 | Arch frame yielding support structure and construction method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111219199A (en) * | 2020-01-14 | 2020-06-02 | 中国建筑第五工程局有限公司 | Arch frame yielding support structure and construction method |
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