CN112412497A - Tunnel secondary lining reinforcing steel bar limiting structure and method for correcting effective lining height - Google Patents
Tunnel secondary lining reinforcing steel bar limiting structure and method for correcting effective lining height Download PDFInfo
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- CN112412497A CN112412497A CN202011434937.1A CN202011434937A CN112412497A CN 112412497 A CN112412497 A CN 112412497A CN 202011434937 A CN202011434937 A CN 202011434937A CN 112412497 A CN112412497 A CN 112412497A
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- 238000000034 method Methods 0.000 title claims abstract description 14
- 229910001294 Reinforcing steel Inorganic materials 0.000 title claims description 42
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 98
- 230000008093 supporting effect Effects 0.000 claims abstract description 83
- 230000007246 mechanism Effects 0.000 claims abstract description 45
- 230000008859 change Effects 0.000 claims abstract description 9
- 230000002787 reinforcement Effects 0.000 claims description 3
- 210000002435 tendon Anatomy 0.000 claims 2
- 238000010276 construction Methods 0.000 abstract description 6
- 238000012937 correction Methods 0.000 abstract description 3
- 239000010410 layer Substances 0.000 description 38
- 229910000831 Steel Inorganic materials 0.000 description 10
- 239000010959 steel Substances 0.000 description 10
- 239000011241 protective layer Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 5
- 238000003466 welding Methods 0.000 description 5
- 238000009434 installation Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 230000001976 improved effect Effects 0.000 description 2
- 210000001503 joint Anatomy 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000012938 design process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000002040 relaxant effect Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
- E21D11/107—Reinforcing elements therefor; Holders for the reinforcing elements
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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
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Abstract
The utility model provides a tunnel secondary lining reinforcing bar limit structure and effective high method of correction lining cutting, relate to the tunnel construction field, including the supporting mechanism that can follow the axial is flexible, the axial both ends of supporting mechanism are connected with the buckle of corresponding connection different layers of reinforcing bar net respectively, the buckle is used for connecting reinforcing bar net intersection, the supporting mechanism includes coaxial first bracing piece that connects gradually, sleeve and second bracing piece, the sleeve can change first bracing piece through rotating, the axial interval of second bracing piece, combine the stirrup between the reinforcing bar net through the supporting mechanism, the supporting mechanism provides the support between the reinforcing bar net, and extend when the reinforcing bar net interval reduces and promote the reinforcing bar net interval increase, avoid adjusting the interval after cutting the stirrup, the stirrup restriction net reinforcing bar interval excessively increases, control the reinforcing bar net interval in required within range jointly.
Description
Technical Field
The disclosure relates to the field of tunnel construction, in particular to a limiting structure for secondary lining reinforcing steel bars of a tunnel and a method for correcting effective lining height.
Background
The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art.
The secondary lining of tunnel engineering is the last line of defense for ensuring the safety of the tunnel, and the construction quality of the secondary lining is directly related to the safety of the tunnel. In the tunnel construction process, because tunnel secondary lining reinforcing bar weight is big, because the effect of gravity in the work progress, often can lead to reinforcing bar position skew design position, cause the distance between two rows of reinforcing bars about the upper and lower too big with the design deviation, and the distance between two-layer reinforcing bar is direct highly relevant with the effective cross-section of secondary lining, therefore the off normal of two rows of reinforcing bars about the secondary lining can lead to the reduction or the increase of effect height. When the effective section height of the secondary lining is reduced too much, the stress performance of the secondary lining structure is reduced, the action of the secondary lining structure on resisting surrounding rock pressure is greatly reduced, the tunnel lining is easy to crack, water leakage can be caused, the lining reinforcing steel bars are corroded, the action of the secondary lining on resisting external force is further reduced, and vicious circle is formed. When the effective cross section height of the tunnel is excessively increased, the effective cross section height of the tunnel inevitably occupies the thickness of the protective layer of the reinforcing steel bars of the tunnel, so that the durability of the secondary lining of the tunnel is reduced, the reinforcing steel bars are easy to rust and expand, the lining is cracked, and the vicious circle can be also entered.
The inventor finds that the secondary lining reinforcing bars of the tunnel are generally connected by an upper layer reinforcing mesh, a lower layer reinforcing mesh and a stirrup, the traditional stirrup needs to be processed on site and is connected with the upper layer reinforcing mesh and the lower layer reinforcing mesh by binding one by one, the traditional stirrup can only limit the increase of the distance between the upper layer reinforcing mesh and the lower layer reinforcing mesh and can not limit the approach between the upper layer reinforcing mesh and the lower layer reinforcing mesh, and therefore, the effective height of the section of the secondary lining can not be ensured; the 'stirrups' are connected with the upper reinforcing mesh and the lower reinforcing mesh in a binding or welding mode, once the binding (welding) is finished, the distance between the upper reinforcing mesh and the lower reinforcing mesh is difficult to correct, and the effective height of the section of the secondary lining is often insufficient; because the distance between the upper and lower hooks of the traditional stirrup is less than the distance between the upper and lower reinforcing meshes of the secondary lining, the traditional stirrup is difficult to install, and the construction speed is severely restricted.
Disclosure of Invention
The purpose of the disclosure is to provide a tunnel secondary lining reinforcing steel bar limiting structure and a method for correcting effective lining height, which aim to overcome the defects in the prior art, and the tunnel secondary lining reinforcing steel bar limiting structure and the method for correcting effective lining height are characterized in that stirrups between reinforcing steel bar meshes are combined through a supporting mechanism, the supporting mechanism provides support between the reinforcing steel bar meshes, and the distance between the reinforcing steel bar meshes is increased by extending when the distance between the reinforcing steel bar meshes is reduced, so that the distance is prevented from being adjusted after the stirrups are cut, the stirrups limit excessive increase of the distance between the reinforcing steel bar meshes, and.
The first purpose of the present disclosure is to provide a tunnel secondary lining reinforcing bar limit structure, adopt following technical scheme:
including the supporting mechanism that can follow the axial is flexible, the axial both ends of supporting mechanism are connected with the buckle that corresponds different layers of reinforcing bar net of connection respectively, and the buckle is used for connecting reinforcing bar net crossing, and supporting mechanism includes coaxial first bracing piece, sleeve and the second bracing piece that connects gradually, and the sleeve can change the axial interval of first bracing piece, second bracing piece through rotating.
Furthermore, one end of the sleeve is in threaded connection with one end of the first supporting rod, the other end of the sleeve is in threaded connection with one end of the second supporting rod, and two ends of the sleeve are in threaded connection to form a rotating lifting mechanism respectively so as to change the relative position of the sleeve and the supporting rods through rotation.
Furthermore, at least two handles are connected to the outer circumferential surface of the sleeve, and the axes of the handles are arranged along the radial direction of the sleeve.
Further, the buckle includes that first hoop spare and second hoop spare, and first hoop spare one end is articulated with second hoop spare one end, and the other end all is equipped with the fastener, can block and form closed structure or unblock.
Further, the axial end part of the supporting mechanism is connected with the first hoop member or the second hoop member, and the connection position is located between the buckle hinge joint and the clamping member.
Furthermore, still include the stirrup, the stirrup both ends all are equipped with the crotch, and the crotch at both ends can correspond to collude different layers of reinforcing bar net for collude and hang at reinforcing bar net intersection.
Furthermore, the supporting structure is located between the two layers of the reinforcing mesh, and the buckles can be sleeved at the cross-shaped cross positions of the longitudinal bars and the transverse bars of the reinforcing mesh.
A second object of the present disclosure is to provide a method for correcting effective lining height, which uses the limiting structure of the secondary lining reinforcing steel bars of the tunnel as described above, and comprises the following steps:
the supporting mechanism is arranged between the two target layers of the reinforcing steel bar meshes, and two ends of the supporting mechanism are respectively connected with the reinforcing steel bar meshes through buckles;
and for the part with the effective height of the section of the lining which does not meet the requirement, the distance between the two layers of reinforcing steel bar meshes is adjusted by stretching and contracting the supporting structure until the requirement is met.
Furthermore, one end of the supporting structure is connected to the crossing position of the longitudinal bars and the transverse bars of one layer of the reinforcing mesh through a buckle, and the other end of the supporting structure is connected to the crossing position of the longitudinal bars and the transverse bars of the other layer of the reinforcing mesh through a buckle.
Further, the sleeve rotates relative to the supporting rod, the relative position of the supporting rod and the sleeve is changed, and therefore the distance between the buckles at the two ends of the supporting mechanism is adjusted.
Compared with the prior art, the utility model has the advantages and positive effects that:
(1) combine the stirrup between the reinforcing bar net through supporting mechanism, supporting mechanism provides the support between the reinforcing bar net to extend when the reinforcing bar net interval reduces and promote the reinforcing bar net interval increase, avoid adjusting the interval after the cutting of stirrup, the excessive increase of stirrup restriction reinforcing bar net interval is with reinforcing bar net interval control in required within range jointly.
(2) The clear distance between the upper layer reinforcing mesh and the lower layer reinforcing mesh of the secondary lining of the tunnel is changed by adjusting the lifting mechanism, so that the effective height of the section of the secondary lining and the thickness of the protective layer are ensured; the clear distance (the effective height of the secondary lining section) of the steel bar which does not meet the requirement can be secondarily adjusted through the limiting structure, so that the stirrup is prevented from being cut, and the correction speed is greatly improved; thereby avoiding the difficult problem that the clear distance between the upper and lower reinforcing meshes cannot be adjusted after the laying of the secondary lining is finished.
(3) Adopt the buckle structure who makes things convenient for the dismouting for the installation is convenient with demolising, is favorable to changing bearing structure's effect position, and, the buckle is located the cross position of reinforcing bar net, improves stability when applying holding power, adjustment power, reduces the reinforcing bar bending that stress concentration leads to.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure and are not to limit the disclosure.
Fig. 1 is a schematic structural diagram of the arrangement of the reinforcement meshes in the lining in the embodiments 1, 2 and 3 of the disclosure;
fig. 2 is an overall schematic view of a limiting structure in embodiments 1, 2, and 3 of the present disclosure;
fig. 3 is a schematic structural view of a reinforcing mesh in embodiments 1, 2, and 3 of the present disclosure;
fig. 4 is a schematic structural view of a sleeve in embodiments 1, 2, and 3 of the present disclosure;
fig. 5 is a schematic structural diagram of a support rod in embodiments 1, 2 and 3 of the present disclosure;
fig. 6 is a schematic structural view of the embodiment 1, 2, 3 of the present disclosure when the buckle is opened;
fig. 7 is a schematic view of the clasp in embodiments 1, 2, and 3 of the disclosure when closed;
fig. 8 is a schematic structural view of a support rod connecting buckle in embodiments 1, 2, and 3 of the present disclosure;
fig. 9 is a schematic structural diagram of a stirrup in embodiments 1, 2 and 3 of the present disclosure.
In the figure, H, the height of the secondary lining section of the tunnel, c, the thickness of the protective layer, d1Thickness of upper reinforcing mesh, d2The thickness of the lower reinforcing mesh, S, and the clear distance between the upper reinforcing mesh and the lower reinforcing mesh;
1. the tunnel secondary lining comprises a tunnel secondary lining, 2, a secondary lining upper layer reinforcing mesh, 2-1, longitudinal reinforcing steel bars, 2-2, transverse reinforcing steel bars, 3, a secondary lining lower layer reinforcing mesh, 4, an intersection, 5, a lifting system, 5-1, a rotating handle, 5-2, a sleeve, 5-3, a sleeve screw thread, 6, a supporting system, 6-1, an upper support, 6-2, a lower support, 6-1-1, a supporting rod, 6-1-2, a supporting rod screw thread, 7, a buckle system, 7-1, a buckle lower ring, 7-2, a buckle upper ring, 7-3, a buckle rotating shaft, 7-4, a buckle closing opening, 8, a butt joint point, 9, a stirrup, 9-1, a stirrup supporting rod, 9-2 and a stirrup hook.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present disclosure. As used herein, the singular forms "a", "an", and/or "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof;
for convenience of description, the words "up", "down", "left" and "right" in this disclosure, if any, merely indicate that the directions of movement are consistent with those of the figures themselves, and are not limiting in structure, but merely facilitate the description of the invention and simplify the description, rather than indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present disclosure.
As introduced in the background art, in the prior art, the "stirrup" is connected with the upper and lower reinforcing meshes in a binding or welding manner, and once the binding (welding) is completed, the distance between the upper and lower reinforcing meshes is difficult to correct, which often results in insufficient effective height of the secondary lining section; because the distance between the upper hook and the lower hook of the traditional stirrup is smaller than the distance between the upper reinforcing mesh and the lower reinforcing mesh of the secondary lining, the traditional stirrup is difficult to install, and the construction speed is severely restricted; aiming at the problems, the disclosure provides a limiting structure of a secondary lining reinforcing steel bar of a tunnel and a method for correcting the effective height of a lining.
Example 1
In an exemplary embodiment of the present disclosure, as shown in fig. 1 to 9, a limiting structure for a secondary lining steel bar of a tunnel is provided.
The supporting mechanism is of a telescopic structure with the distance between two axial ends adjustable, supporting force or traction force is applied to a reinforcing steel bar net through end connection buckles, the two ends of the supporting mechanism are respectively connected with the buckles, the stirrups 9 and the supporting mechanism are arranged at intervals, the two ends of the stirrups are bent to form stirrup hooks 9-2, and stirrup supporting rods 9-1 connected with the hooks are formed in the middle of the stirrups.
The supporting mechanism is located between two layers of reinforcing steel bar nets to be adjusted, the clamping buckle is driven to move through axial extension and shortening, the clamping buckle pushes the reinforcing steel bar nets to increase the distance or pull the reinforcing steel bar nets to reduce the distance, active interference regulation and control are carried out on the distance between the upper and lower layers of reinforcing steel bar nets of the secondary lining, the distance between the upper and lower layers of reinforcing steel bar nets is made to be in a proper distance, the installation space of the stirrups is guaranteed, and the installation of the stirrups and the control of the.
In this embodiment, the supporting mechanism is a combined structure, a telescopic structure is formed by matching the supporting rod with the sleeve, and the relative position of the supporting rod and the sleeve is controlled by controlling the action of the sleeve, so that telescopic adjustment is realized.
It can be understood that can be sliding connection between bracing piece and the sleeve, a bracing piece is established to the sleeve both ends cover respectively to the cooperation retaining member, bracing piece one end connecting sleeve, the buckle is connected to the other end, when the bracing piece removes for the sleeve, the increase bracing piece is located the length of sleeve outer part, thereby reach the extension bracing piece, promote the purpose of interval increase between the reinforcing bar net, after reaching required interval, lock bracing piece and telescopic relative position through the retaining member, lock the interval of reinforcing bar net in required position.
The locking piece can be selected from a pin, a hoop or a locking bolt and the like;
when the pin is selected, corresponding multi-stage positioning holes are formed in the supporting rod and the sleeve, the pin is matched with different positioning holes to realize multi-stage locking, and the pin is used for matching after the relative position of the supporting rod and the sleeve is adjusted;
it should be pointed out that the spacing and the size of the positioning holes are controlled according to the supporting force and the spacing adjustment precision required by the reinforcing mesh, the spacing and the size of the positioning holes are properly increased, stronger supporting force can be provided, the adjustment precision is reduced, the spacing and the size of the positioning holes are properly reduced, the spacing adjustment precision can be enhanced, and the supporting performance is reduced; therefore, the distance and the size of the positioning holes can be selected according to requirements.
When using the staple bolt, the staple bolt encircles outside the sleeve, controls locking and unblock through tightening up or relaxing, and the holding power of staple bolt decides the holding power size of bracing piece, consequently, select according to the demand can.
Similarly, for the selection of the locking bolt, the proper diameter and model can be selected according to the requirement.
Preferably, in this embodiment, the supporting mechanism is of a bidirectional telescopic structure, two axial ends of the supporting mechanism are respectively connected with a buckle correspondingly connected with different layers of reinforcing meshes, the buckle is used for connecting with an intersection of the reinforcing meshes, the supporting mechanism includes a first supporting rod, a sleeve 5-2 and a second supporting rod which are coaxially and sequentially connected, and the sleeve can change the axial distance between the first supporting rod and the second supporting rod through rotation.
For the configuration of the supporting mechanism, one end of the sleeve is in threaded connection with one end of the first supporting rod, the other end of the sleeve is in threaded connection with one end of the second supporting rod, and two ends of the sleeve are respectively connected through threads to form a rotating lifting mechanism so as to change the relative position of the sleeve and the supporting rods through rotation.
In the embodiment, one end of the sleeve is provided with a sleeve screw thread 5-3, one end of the support rod 6-1-1 is provided with a support rod screw thread 6-1-2, and the screw threads are matched to form threaded connection, so that the axial relative position of the support mechanism is changed by utilizing relative rotation, and the purpose of adjusting the overall axial length of the support mechanism is achieved.
Both ends of the sleeve are matched with the supporting rods through threaded connection, the two supporting rods are connected together through the sleeve, one supporting rod forms an upper support 6-1, the other supporting rod forms a lower support 6-2, and when the sleeve is rotated, the end parts of the upper support and the lower support can be close to or far away from each other at the same time.
At least two rotating handles 5-1 are connected on the outer circumferential surface of the sleeve, and the axes of the handles are arranged along the radial direction of the sleeve.
Through arranging the handle, combine the sleeve to form operating system 5, conveniently exert the turning force to the sleeve, through disposing a plurality of handles, can increase the operating position, conveniently carry out telescopic rotation operation in narrow and small reinforcing bar net space, improve maneuverability.
The structure of the buckle comprises a first hoop piece and a second hoop piece, wherein one end of the first hoop piece is hinged with one end of the second hoop piece, and the other end of the first hoop piece is provided with a clamping piece which can be clamped to form a closed structure or be unlocked;
the axial end part of the supporting mechanism is connected with the first hoop member or the second hoop member, and the connection part is positioned between the buckle hinge joint and the clamping member.
In this embodiment, the first hoop member is a lower buckle ring 7-1, which is connected to the support rod, the second hoop member is an upper buckle ring 7-2, which is hinged to the lower buckle ring via a buckle rotation shaft 7-3, and the other end of the first hoop member is a buckle closing opening 7-4.
The buckle is integrally of an elliptical annular structure and can surround the cross position of the transverse bar and the longitudinal bar of the reinforcing mesh, and the supporting force or traction force of the supporting rod is applied to the reinforcing mesh through the connection of the buckle;
the 8 positions of butt joint points of buckle and bracing piece can adopt fixed connection, for example welding, integrated into one piece etc. also can adopt detachable connection, for example threaded connection, articulated etc..
Adopt the buckle structure who makes things convenient for the dismouting for the installation is convenient with demolising, is favorable to changing bearing structure's effect position, and, the buckle is located the cross position of reinforcing bar net, improves stability when applying holding power, adjustment power, reduces the reinforcing bar bending that stress concentration leads to.
The hooks at the two ends can correspondingly hook different layers of reinforcing mesh for hooking at the intersection of the reinforcing mesh.
The reinforcing mesh in the tunnel secondary lining 1 comprises a secondary lining upper layer reinforcing mesh 2 and a secondary lining lower layer reinforcing mesh 3, a support structure is positioned between the two layers of reinforcing meshes, and a buckle can be sleeved at the cross-shaped cross position of a reinforcing mesh longitudinal bar and a transverse bar;
effective height of the secondary lining section of the tunnel: h is0＝H-(c1+d1/2) or h0＝H-(c2+d2/2)；
Protective layer of steel bar c1+c2＝H-(d1+d2+ S), according to the above three formulas:
effective height of the secondary lining section of the tunnel: h is0＝(H+S)/2+(d1+d2)/4. The height H of the section of the secondary lining of the tunnel and the thickness d of the upper reinforcing mesh are determined in the design process1Lower reinforcing mesh thickness d2Thus effective height h of the secondary lining cross section0Is a function of the clear distance S between the upper and lower layers of reinforcing meshes.
It is particularly pointed out that the effective height of the secondary lining structure of the tunnel is affected by S, since H, d1、d2To determine the quantity, S is the independent variable, h0Is a dependent variable of S; h is0Following the change of S, the elevator structure may influence the change of S, and thus, the elevator is arranged to be liftedThe mechanism can carry out good regulation control to the effective height of secondary lining cross-section.
Wherein, the height H of the section of the secondary lining of the tunnel and the thickness c of the upper protective layer1Upper protective layer thickness c2Thickness d of upper reinforcing mesh1Lower reinforcing mesh thickness d2And the clear distance S between the upper layer reinforcing mesh and the lower layer reinforcing mesh.
As for the steel bar net structure, in this embodiment, the steel bar net structure is a grid structure formed by intersecting and overlapping a plurality of transverse steel bars 2-2 and a plurality of longitudinal steel bars 2-1, and is tied up by binding wires at the intersections 4.
And after the steel bars are laid, secondarily checking the positions of the reinforcing meshes on the upper layer and the lower layer of the secondary lining through a limiting structure.
Combine the stirrup between the reinforcing bar net through supporting mechanism, supporting mechanism provides the support between the reinforcing bar net to extend when the reinforcing bar net interval reduces and promote the reinforcing bar net interval increase, avoid adjusting the interval after the cutting of stirrup, the excessive increase of stirrup restriction reinforcing bar net interval is with reinforcing bar net interval control in required within range jointly.
Example 2
In the present embodiment, the difference from embodiment 1 is in the sleeve.
The sleeve can be replaced by other structures, the adjusting block with a pair of coaxial threaded holes is adopted, the whole adjusting block is of a cubic structure, one group of opposite faces of the adjusting block are respectively provided with a threaded hole, the threaded holes are respectively matched with the supporting rods, the effect of replacing the sleeve is achieved, and the distance between the supporting rods is adjusted through rotation.
Example 3
In another exemplary embodiment of the present disclosure, as shown in fig. 1 to 9, a method for modifying effective lining height is provided, which uses the limiting structure of the secondary lining steel bar of the tunnel as described in example 1.
The method comprises the following steps:
the supporting mechanism is arranged between the two layers of the target reinforcing steel bar meshes, two ends of the supporting mechanism are respectively connected with the reinforcing steel bar meshes through buckles, one end of the supporting structure is connected to the crossing position of the longitudinal bars and the transverse bars of one layer of the reinforcing steel bar meshes through buckles, and the other end of the supporting structure is connected to the crossing position of the longitudinal bars and the transverse bars of the other layer of the reinforcing steel bar meshes through buckles;
for the lining section effective height part which does not meet the requirement, the sleeve changes the relative position of the supporting rod and the sleeve by rotating relative to the supporting rod so as to adjust the distance between the buckles at the two ends of the supporting mechanism until the requirement is met.
The clear distance between the upper layer reinforcing mesh and the lower layer reinforcing mesh of the secondary lining of the tunnel is changed by adjusting the lifting mechanism, so that the effective height of the section of the secondary lining and the thickness of the protective layer are ensured;
the clear distance (the effective height of the secondary lining section) of the steel bar which does not meet the requirement can be secondarily adjusted through the limiting structure, so that the stirrup is prevented from being cut, and the correction speed is greatly improved; thereby avoiding the difficult problem that the clear distance between the upper and lower reinforcing meshes cannot be adjusted after the laying of the secondary lining is finished.
The above description is only a preferred embodiment of the present disclosure and is not intended to limit the present disclosure, and various modifications and changes may be made to the present disclosure by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present disclosure should be included in the protection scope of the present disclosure.
Claims (10)
1. The utility model provides a tunnel secondary lining reinforcing bar limit structure, its characterized in that, is including following the flexible supporting mechanism of axial, and the axial both ends of supporting mechanism are connected with the buckle of corresponding connection different layers of reinforcing bar net respectively, and the buckle is used for connecting reinforcing bar net intersection, and the supporting mechanism includes coaxial first bracing piece, sleeve and the second bracing piece that connects gradually, and the sleeve can change the axial interval of first bracing piece, second bracing piece through rotating.
2. The limiting structure for secondary lining reinforcing steel bars of tunnel according to claim 1, wherein one end of the sleeve is connected with one end of the first supporting rod in a threaded manner, the other end of the sleeve is connected with one end of the second supporting rod in a threaded manner, and the two ends of the sleeve are respectively formed into a rotary lifting mechanism through threaded connection, so that the relative position of the sleeve and the supporting rod can be changed through rotation.
3. The limiting structure for secondary lining reinforcing steel bars of tunnel according to claim 2, wherein at least two handles are connected to the outer circumference of the sleeve, and the axes of the handles are arranged along the radial direction of the sleeve.
4. The limiting structure for the secondary lining reinforcing steel bars of the tunnel according to claim 1, wherein the buckle comprises a first hoop member and a second hoop member, one end of the first hoop member is hinged with one end of the second hoop member, and the other end of the first hoop member is provided with a clamping member which can be clamped to form a closed structure or be unlocked.
5. The limiting structure for secondary lining reinforcing steel bars of tunnel according to claim 4, wherein the axial end part of the supporting mechanism is connected with the first hoop element or the second hoop element, and the connection position is located between the clamping element and the buckling hinge.
6. The limiting structure for secondary lining reinforcing steel bars of a tunnel according to claim 1, further comprising a hoop, wherein hooks are arranged at both ends of the hoop, and the hooks at both ends can correspondingly hook different layers of reinforcing steel bar meshes for hooking at a reinforcing steel bar mesh intersection.
7. The limiting structure for secondary lining reinforcing steel bars of tunnel according to claim 1, wherein the supporting structure is located between two layers of reinforcing mesh, and the buckles can be sleeved at the criss-cross positions of the longitudinal bars and the transverse bars of the reinforcing mesh.
8. A method for correcting effective lining height by using the limiting structure of the secondary lining reinforcing steel bars of the tunnel according to any one of claims 1 to 7, which is characterized by comprising the following steps:
the supporting mechanism is arranged between the two target layers of the reinforcing steel bar meshes, and two ends of the supporting mechanism are respectively connected with the reinforcing steel bar meshes through buckles;
and for the part with the effective height of the section of the lining which does not meet the requirement, the distance between the two layers of reinforcing steel bar meshes is adjusted by stretching and contracting the supporting structure until the requirement is met.
9. The method of modifying the effective height of a lining of claim 8 wherein the support structure is connected at one end to the intersection of the longitudinal and transverse tendons of one layer of mesh reinforcement by a snap fit and at the other end to the intersection of the longitudinal and transverse tendons of the other layer of mesh reinforcement by a snap fit.
10. The method of modifying the effective height of a lining of claim 8 wherein the sleeve is rotated relative to the support rod to change the relative position of the support rod and the sleeve to adjust the spacing of the clips at the ends of the support structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011434937.1A CN112412497A (en) | 2020-12-10 | 2020-12-10 | Tunnel secondary lining reinforcing steel bar limiting structure and method for correcting effective lining height |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113668734A (en) * | 2021-08-12 | 2021-11-19 | 中建二局第一建筑工程有限公司 | Supporting rod and keel supporting system of assembly type building wall |
| CN113700049A (en) * | 2021-08-16 | 2021-11-26 | 北京市市政一建设工程有限责任公司 | Anti fixing device that floats of tunnel foundation ditch bottom plate |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207111123U (en) * | 2017-07-14 | 2018-03-16 | 中铁八局集团昆明铁路建设有限公司 | A kind of adjustable double groove device of inverted arch reinforcement installation |
| CN207363677U (en) * | 2017-09-13 | 2018-05-15 | 中交一公局桥隧工程有限公司 | A kind of tunnel inverted arch reserves circumferential muscle positioning fixture |
| CN108756949A (en) * | 2018-06-26 | 2018-11-06 | 中铁五局集团贵州工程有限公司 | One kind being used for tunnel double-lining reinforcing bar interlamellar spacing and protective layer positioning device |
| CN208441873U (en) * | 2018-07-10 | 2019-01-29 | 招商局重庆交通科研设计院有限公司 | A kind of tunnel lining reinforcing steel bar arrangement construction increasing limit rib |
| CN208633842U (en) * | 2018-04-27 | 2019-03-22 | 云南省建设投资控股集团有限公司 | The positioning of Tunnel Second Lining double steel bar and concrete protective thickness control device |
| CN210396762U (en) * | 2019-07-24 | 2020-04-24 | 中铁七局集团武汉工程有限公司 | Inverted arch steel bar positioning device |
| CN210948702U (en) * | 2019-10-16 | 2020-07-07 | 中交二公局第四工程有限公司 | Tunnel secondary lining hoop reinforcing steel bar fixture |
| CN211144515U (en) * | 2019-06-17 | 2020-07-31 | 晏鹏博 | Tunnel secondary lining steel bar positioner |
| CN211950515U (en) * | 2020-04-07 | 2020-11-17 | 中铁十一局集团第五工程有限公司 | Two lining reinforcing bar positioning fixture in tunnel |
-
2020
- 2020-12-10 CN CN202011434937.1A patent/CN112412497A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207111123U (en) * | 2017-07-14 | 2018-03-16 | 中铁八局集团昆明铁路建设有限公司 | A kind of adjustable double groove device of inverted arch reinforcement installation |
| CN207363677U (en) * | 2017-09-13 | 2018-05-15 | 中交一公局桥隧工程有限公司 | A kind of tunnel inverted arch reserves circumferential muscle positioning fixture |
| CN208633842U (en) * | 2018-04-27 | 2019-03-22 | 云南省建设投资控股集团有限公司 | The positioning of Tunnel Second Lining double steel bar and concrete protective thickness control device |
| CN108756949A (en) * | 2018-06-26 | 2018-11-06 | 中铁五局集团贵州工程有限公司 | One kind being used for tunnel double-lining reinforcing bar interlamellar spacing and protective layer positioning device |
| CN208441873U (en) * | 2018-07-10 | 2019-01-29 | 招商局重庆交通科研设计院有限公司 | A kind of tunnel lining reinforcing steel bar arrangement construction increasing limit rib |
| CN211144515U (en) * | 2019-06-17 | 2020-07-31 | 晏鹏博 | Tunnel secondary lining steel bar positioner |
| CN210396762U (en) * | 2019-07-24 | 2020-04-24 | 中铁七局集团武汉工程有限公司 | Inverted arch steel bar positioning device |
| CN210948702U (en) * | 2019-10-16 | 2020-07-07 | 中交二公局第四工程有限公司 | Tunnel secondary lining hoop reinforcing steel bar fixture |
| CN211950515U (en) * | 2020-04-07 | 2020-11-17 | 中铁十一局集团第五工程有限公司 | Two lining reinforcing bar positioning fixture in tunnel |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113668734A (en) * | 2021-08-12 | 2021-11-19 | 中建二局第一建筑工程有限公司 | Supporting rod and keel supporting system of assembly type building wall |
| CN113700049A (en) * | 2021-08-16 | 2021-11-26 | 北京市市政一建设工程有限责任公司 | Anti fixing device that floats of tunnel foundation ditch bottom plate |
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Address after: 250031 No. 576 Wushanxi Road, Tianqiao District, Jinan City, Shandong Province Applicant after: Shandong transportation planning and Design Institute Group Co.,Ltd. Address before: 250031 No. 576 Wushanxi Road, Tianqiao District, Jinan City, Shandong Province Applicant before: Shandong transportation planning and Design Institute Co.,Ltd. |
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Application publication date: 20210226 |