CN216305959U - Tunnel steelframe additional strengthening - Google Patents
Tunnel steelframe additional strengthening Download PDFInfo
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- CN216305959U CN216305959U CN202220493901.9U CN202220493901U CN216305959U CN 216305959 U CN216305959 U CN 216305959U CN 202220493901 U CN202220493901 U CN 202220493901U CN 216305959 U CN216305959 U CN 216305959U
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Abstract
The utility model provides a tunnel steel frame reinforcing structure which comprises an anti-settling component arranged at a step boundary connecting part of a tunnel steel frame, wherein the anti-settling component is fixedly connected with a joint of the tunnel steel frame, the anti-settling component comprises a supporting piece and at least two first foot locking anchor rod rows, the supporting piece extends along the tunnel direction and abuts against the inner wall surface of an excavated tunnel, the supporting piece comprises a supporting plate and a connecting part, the supporting plate abuts against the inner wall surface of the excavated tunnel, the connecting part is fixedly connected with the joint of the tunnel steel frame, the first foot locking anchor rod rows comprise a supporting end and a supporting end which are arranged oppositely, the supporting end is supported on the tunnel steel frame above the supporting piece, the supporting direction of the first foot locking anchor rod rows is that the tunnel steel frame is supported obliquely upwards from the outer side of the tunnel, and each first foot locking anchor rod row comprises at least two first foot locking anchor rods. The utility model can increase the stress area of the tunnel steel frame and effectively prevent the tunnel from easily settling at the step boundary.
Description
Technical Field
The utility model relates to the technical field of tunnels, in particular to a tunnel steel frame reinforcing structure.
Background
With the rapid development of economy and the vigorous promotion of urban construction in China, urban traffic volume is greatly increased, and urban tunnel engineering is continuously promoted and developed. The urban multi-arch tunnel is taken as a typical representative of urban tunnel engineering, has the characteristics of large section, poor geological condition, shallow burying depth, complex surrounding environment and the like, and has extremely high construction risk.
At present, big section multiple arch tunnel often adopts the excavation mode of three pilot tunnels (well pilot tunnel + lateral wall pilot tunnel), this mode is convenient for large-scale machinery to get into the operation, adopt mechanical excavation, core soil can be reserved, however, the step boundary in the rich water soil property tunnel takes place to subside very easily in the work progress and leads to the tunnel fracture, lock foot stock and tunnel steelframe are connected to the most mode that adopts steel bar welding in the work progress at present, however, this mode is limited to the holding power of tunnel internal face, tunnel steelframe takes place to subside very easily in tunnel excavation process, can not support tunnel soil property country rock effectively reliably, therefore the tunnel takes place to subside easily in step boundary, the engineering accident that causes from this takes place occasionally.
In view of the above, there is a need for a tunnel steel frame reinforced structure that solves or at least alleviates the above-mentioned drawbacks.
SUMMERY OF THE UTILITY MODEL
The utility model mainly aims to provide a tunnel steel frame reinforcing structure, which aims to solve the problems that a tunnel steel frame is easy to settle and the supporting force on the inner wall surface of a tunnel is limited so that the tunnel is easy to settle at a step boundary to cause tunnel cracking in the prior art by adopting a three-step core soil reserving method.
In order to achieve the purpose, the utility model provides a tunnel steel frame reinforcing structure which comprises an anti-settling component arranged at the step boundary connecting part of a tunnel steel frame, wherein the anti-settling component is fixedly connected with a joint of the tunnel steel frame; the anti-settling assembly comprises a supporting piece and at least two first pin locking anchor rod rows, wherein the supporting piece extends along the tunnel direction and abuts against the inner wall surface of the excavated tunnel;
the support piece comprises a support plate used for being abutted against the inner wall surface of the excavated tunnel and a connecting part fixedly connected with a joint of the tunnel steel frame; the first foot locking anchor rod row comprises a supporting end and a grounding end which are arranged oppositely, the supporting end is supported on the tunnel steel frame above the supporting piece, and the supporting direction of the first foot locking anchor rod row is that the tunnel steel frame is supported from the outer side of the tunnel upwards in an inclined mode; each first foot-locking anchor rod row comprises at least two first foot-locking anchor rods.
Preferably, the anti-settling assembly further comprises a first connecting plate fixed to the top of the connecting portion and a second connecting plate fixed to the bottom of the connecting portion, the first connecting plate and the second connecting plate are arranged correspondingly, and the first connecting plate and the second connecting plate are respectively fixedly connected with the tunnel steel frames on two sides of the connecting portion.
Preferably, the supporting piece is a channel steel, an opening of the channel steel is arranged upwards, the extending direction of the channel steel is arranged along the extending direction of the tunnel, the supporting plate is a side plate of the channel steel, which is close to one side of the inner wall surface of the tunnel, and the connecting part is a bottom plate of the channel steel; the width of the channel steel is larger than the thickness of the tunnel steel frame; the bottom plate of channel-section steel has seted up at least one and has supplied the first connecting hole that the bolt runs through, first connecting plate with the second connecting plate seted up respectively with the corresponding second connecting hole of first connecting hole, first connecting plate with the second connecting plate runs through the bolt respectively the second connecting hole and first connecting hole with channel-section steel fixed connection.
Preferably, the length of the channel steel is greater than the width of the tunnel steel frame.
Preferably, the supporting piece is H-shaped steel, an opening of the H-shaped steel is vertically arranged, an extending direction of the H-shaped steel is arranged along an extending direction of the tunnel, the supporting plate is a side plate of the H-shaped steel on one side close to an inner wall surface of the tunnel, and the connecting portion is a bottom plate of the H-shaped steel; the width of the H-shaped steel is larger than the thickness of the tunnel steel frame, at least one third connecting hole for a bolt to penetrate through is formed in a bottom plate of the H-shaped steel, fourth connecting holes corresponding to the third connecting holes are formed in the first connecting plate and the second connecting plate respectively, and the first connecting plate and the second connecting plate penetrate through the fourth connecting holes and the third connecting holes and are fixedly connected with the H-shaped steel through bolts respectively.
Preferably, the lengths of the first connecting plate and the second connecting plate are both greater than the width of the tunnel steel frame, and the widths of the first connecting plate and the second connecting plate are both greater than the thickness of the tunnel steel frame.
Preferably, the tunnel steel frame reinforcing structure further comprises at least two second foot-locking anchor rod rows supported at the arch springing of the lower step, the support ends of the second foot-locking anchor rod rows are supported on the tunnel steel frame at the arch springing of the lower step, the support direction of the second foot-locking anchor rod rows is that the tunnel steel frame is supported from the outside of the tunnel in an inclined upward manner, and each second foot-locking anchor rod row comprises at least two second foot-locking anchor rods.
Preferably, the number of the first foot-locking anchor rod rows and the number of the second foot-locking anchor rod rows are two, each first foot-locking anchor rod row comprises two first foot-locking anchor rods, each second foot-locking anchor rod row comprises two second foot-locking anchor rods, and the spacing distance between the two first foot-locking anchor rod rows and the spacing distance between the two second foot-locking anchor rod rows are both set to be 50cm-80 cm; the diameter of the first foot-locking anchor rod and the diameter of the second foot-locking anchor rod are both set to be between 40mm and 45mm, and the length of the first foot-locking anchor rod and the length of the second foot-locking anchor rod are both set to be between 400mm and 500 mm.
Preferably, the length and the width of the first connecting plate and the second connecting plate are set between 220mm and 300mm, and the thickness of the first connecting plate and the second connecting plate is set between 10mm and 20 mm.
Compared with the prior art, the utility model has the following beneficial effects:
according to the tunnel steel frame reinforcing structure provided by the utility model, the anti-settlement component is arranged at the step boundary joint of the tunnel steel frame, the anti-settlement component is fixedly connected with the joint of the tunnel steel frame, the anti-settlement component extends along the tunnel direction and abuts against the inner wall surface of an excavated tunnel, and at least two first foot-locking anchor rod rows and second foot-locking anchor rod rows are arranged to further support the tunnel steel frame; in addition, pass through the bolt fastening with first connecting plate and second connecting plate through the setting prevent subsiding the connecting portion of subassembly, so can increase the lifting surface area of tunnel steelframe by a wide margin, effectively prevented that the tunnel from taking place the problem of subsiding easily in step boundary department.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a diagram of an application scenario in one embodiment of the present invention;
FIG. 2 is an enlarged schematic view of FIG. 1 at A;
FIG. 3 is a perspective view of a support arrangement in one embodiment of the utility model;
fig. 4 is a schematic side view of a support arrangement in an embodiment of the utility model.
The objects, features and advantages of the present invention will be further explained with reference to the accompanying drawings.
The reference numbers illustrate:
10. a tunnel; 110. an upper step; 120. a middle step; 130. descending a step; 140. reserving core soil; 20. a tunnel steel frame; 30. a tunnel steel frame reinforcing structure; 310. an anti-settling component; 320. a support member; 330. a first lock foot anchor bar row; 340. a first connecting plate; 350. a second connecting plate; 360. channel steel; 361. side plates of channel steel; 362. a bottom plate of the channel steel; 370. a bolt; 380. and a second locking anchor bar row.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
Referring to fig. 1 to 4, in an embodiment of the present invention, a tunnel steel frame reinforced structure includes an anti-settling component 310 disposed at a step boundary connection of a tunnel steel frame 20, and the anti-settling component 310 is fixedly connected to a joint of the tunnel steel frame 20. Firstly, it is clear that the tunnel 10 excavation method of the application adopts a method of excavating the middle pilot tunnel and the three-step reserved core soil 140 to replace the traditional three-pilot tunnel excavation, and the method is convenient for large machinery to enter operation and convenient and fast to construct; the soil tunnel 10 does not need to be blasted, mechanical excavation is adopted, core soil can be reserved, three steps are actively adopted to reserve the core soil 140, the ground surface settlement can be effectively controlled, and the risk of shallow collapse is avoided. In addition, as can be understood by those skilled in the art, the upper step 110, the middle step 120 and the lower step 130 are formed by a three-step core soil reservation method, and the step boundary referred to in the present application is a boundary transition between the upper step 110 and the middle step 120 and a boundary connection between the middle step 120 and the lower step 130.
The number of the anti-settling components 310 can be set according to actual needs, for example, the anti-settling components 310 are arranged on the left side and the right side of each tunnel 10 in the application, one anti-settling component 310 is arranged at the boundary transition position of the upper step 110 and the middle step 120 and one anti-settling component 310 is arranged at the boundary transition position of the middle step 120 and the lower step 130, and the anti-settling components 310 are arranged and fixedly connected with the tunnel steel frame 20, so that the positions of a plurality of supporting points of the tunnel steel frame 20 are increased, the stress form of the tunnel steel frame 20 is improved, the supporting effect of the tunnel steel frame 20 on the wall surface of the tunnel 10 can be improved, and the problem that the tunnel steel frame 10 is prone to settling at the step boundary position is effectively prevented.
The anti-settling assembly 310 includes a support member 320 extending along the tunnel 10 and abutting against the inner wall surface of the excavated tunnel 10, and at least two first lockpin anchor bar rows 330. It is worth noting that the anti-settling component 310 is arranged along the extending direction of the tunnel 10 and is abutted against the inner wall surface of the tunnel 10, that is, when the excavation is performed by adopting the three-step method of reserving core soil, the inner wall surface of the tunnel 10 is supported by using the tunnel steel frame 20 along with the progress of the excavation of the tunnel 10, and the contact area between the tunnel steel frame 20 and the inner wall of the tunnel 10 can be indirectly increased by prolonging the length of the supporting member 320, so that the settling of the tunnel 10 is reduced. In addition, the number of the first foot-locking anchor bar rows 330 can be set according to actual needs, and the first foot-locking anchor bar rows 330 can prevent the arch springing of the tunnel steel frame 20 from shrinking and falling.
Specifically, the supporting member 320 includes a supporting plate (not shown) for abutting against an inner wall surface of the excavated tunnel 10 and a connecting portion (not shown) fixedly connected to a joint of the tunnel steel frame 20; the first foot-locking anchor bar row 330 includes a support end (not shown) and a ground support end (not shown) which are oppositely arranged, the support end is supported on the tunnel steel frame 20 above the support member 320, and the support direction of the first foot-locking anchor bar row 330 is to support the tunnel steel frame 20 from the outside of the tunnel 10 obliquely upwards; each of the first foot-lock anchor rows 330 includes at least two first foot-lock anchors (not shown). The ground supporting end of the first foot locking anchor rod row 330 is driven into the soil surrounding rock, the supporting end of the first foot locking anchor rod row 330 is fixed on the tunnel steel frame 20 and supported on the tunnel steel frame 20, and the supporting direction is inclined upwards, so that the tunnel steel frame 20 is guaranteed to have upward supporting component force.
As a preferred embodiment of the present invention, the anti-settling assembly 310 further includes a first connecting plate 340 fixed to the top of the connecting portion and a second connecting plate 350 fixed to the bottom of the connecting portion, the first connecting plate 340 and the second connecting plate 350 are correspondingly disposed, and the first connecting plate 340 and the second connecting plate 350 are respectively and fixedly connected to the tunnel steel frames 20 at both sides of the connecting portion.
In this embodiment, the first connecting plate 340 and the second connecting plate 350 are arranged at the arch springing of the upper step 110 and the arch springing of the middle step 120 of the tunnel steel frame 20, wherein the first connecting plate 340 and the second connecting plate 350 may be selected as connecting steel plates, in other words, the tunnel steel frame 20 subsections are further connected at the step boundary position through the first connecting plate 340 and the second connecting plate 350, wherein, the fixed connection mode of the first connecting plate 340 and the second connecting plate 350 with the tunnel steel frame 20 can be selected as welding or connection mode through bolts 370, so, utilize first connecting plate 340 and second connecting plate 350, support piece 320 and tunnel steelframe 20's mutual traction effect, can increase substantially tunnel steelframe 20's lifting surface area, increase tunnel steelframe 20 self structural strength, effectively reduce the problem that tunnel 10 takes place to subside easily in the step boundary department.
In a preferred embodiment, the supporting member 320 is a channel steel 360, an opening of the channel steel 360 is disposed upward, an extending direction of the channel steel 360 is disposed along an extending direction of the tunnel 10, the supporting plate is a side plate 361 of the channel steel 360 on a side close to an inner wall surface of the tunnel 10, and the connecting portion is a bottom plate 362 of the channel steel; the width of the channel steel 360 is greater than the thickness of the tunnel steel frame 20; the bottom plate 362 of the channel steel is provided with at least one first connection hole (not shown) for a bolt 370 to pass through, the first connection plate 340 and the second connection plate 350 are respectively provided with second connection holes (not shown) corresponding to the first connection hole, and the first connection plate 340 and the second connection plate 350 respectively pass through the second connection hole and the first connection hole through the bolt 370 and are fixedly connected with the channel steel 360.
It should be noted that, choose for use support piece 320 in this embodiment as channel-section steel 360, have mechanical properties and be excellent, economic applicability is good, will channel-section steel 360's opening upwards sets up, channel-section steel 360's extending direction sets up along tunnel 10 extending direction, and the lifting surface area of curb plate 361 broad that can make full use of the channel-section steel supports tunnel 10 internal face, preferably, channel-section steel 360's length is greater than tunnel steelframe 20's width, and its specific length can be selected according to actual need, and it needs to be noted that, tunnel steelframe 20's that indicates in this application indicates the direction of extending along tunnel 10. The thickness direction of tunnel steelframe 20 is for the transverse dimension along tunnel 10, compares in the tradition and only lays tunnel steelframe 20's mode at tunnel 10 interval, and this embodiment can utilize channel-section steel 360 to the supporting role of tunnel 10 inner wall, can prevent effectively that the water softening of soil property country rock meets water and leads to the bearing capacity decline and the settlement that arouses, tunnel steelframe 20 subsides when reducing tunnel 10 excavation simultaneously. In addition, the first connecting plate 340 and the second connecting plate 350 are fixed on the bottom plate 362 of the channel steel through the bolts 370, so that subsections of the upper and lower tunnel steel frames 20 can be effectively and fully connected, the connecting area can be effectively increased, the structural strength of the tunnel steel frame 20 can be increased by utilizing the mutual restraining effect of the channel steel 360, the first connecting plate 340, the second connecting plate 350 and the tunnel steel frame 20, and the settlement problem of the tunnel steel frame 20 during the excavation of the tunnel 10 can be effectively relieved.
As another preferred embodiment, the supporting member 320 is an H-shaped steel, an opening of the H-shaped steel is vertically arranged, an extending direction of the H-shaped steel is arranged along an extending direction of the tunnel 10, the supporting plate is a side plate (not shown) of the H-shaped steel on a side close to an inner wall surface of the tunnel 10, and the connecting portion is a bottom plate (not shown) of the H-shaped steel; the width of the H-beam is greater than the thickness of the tunnel steel frame 20, a bottom plate of the H-beam is provided with at least one third connecting hole (not shown) for a bolt 370 to pass through, the first connecting plate 340 and the second connecting plate 350 are respectively provided with a fourth connecting hole (not shown) corresponding to the third connecting hole, and the first connecting plate 340 and the second connecting plate 350 are respectively fixedly connected to the H-beam by passing through the fourth connecting hole and the third connecting hole via the bolt 370.
It should be noted that, choose support piece 320 for use as H shaped steel, and support the curb plate of H shaped steel in the internal face of tunnel 10, area of contact through the curb plate broad of H shaped steel on the one hand, compare in channel-section steel 360, its curb plate has wideer lifting surface area, on the other hand extends H shaped steel along the extending direction of tunnel 10 and sets up, compare in the tradition only in the mode that tunnel 10 interval laid tunnel steelframe 20, the embodiment can utilize the supporting role of tunnel 10 inner wall to H shaped steel, can prevent effectively that soil country rock meets water softening and leads to the settlement that bearing capacity descends and arouse, tunnel steelframe 20's settlement when reducing tunnel 10 excavation simultaneously. In addition, the first connecting plate 340 and the second connecting plate 350 are fixed on the bottom plate 362 of the H-shaped steel through the bolts 370, so that subsections of the upper and lower tunnel steel frames 20 can be effectively and fully connected, the connecting area can be effectively increased, the self strength of the tunnel steel frame 20 is increased by utilizing the mutual traction effect of the H-shaped steel, the first connecting plate 340, the second connecting plate 350 and the tunnel steel frame 20, and the settlement problem of the tunnel steel frame 20 during the excavation of the tunnel 10 can be effectively relieved.
Further, the lengths of the first connecting plate 340 and the second connecting plate 350 are both greater than the width of the tunnel steel frame 20, and the widths of the first connecting plate 340 and the second connecting plate 350 are both greater than the thickness of the tunnel steel frame 20. It should be noted that, the areas of the first connecting plate 340 and the second connecting plate 350 in this embodiment are larger than the cross-sectional area of the tunnel steel frame 20, so that the first connecting plate 340 and the second connecting plate 350 can cover the tunnel steel frame 20, the structural strength of the tunnel steel frame 20 is increased through the first connecting plate 340 and the second connecting plate 350, and the settlement of the tunnel steel frame 20 during the excavation of the tunnel 10 is reduced.
In a preferred embodiment, the tunnel steel frame reinforcing structure 30 further includes at least two second foot-locking anchor rows 380 supported at the arch springing of the lower step 130, the support ends of the second foot-locking anchor rows 380 are supported on the tunnel steel frame 20 at the arch springing of the lower step 130, the support direction of the second foot-locking anchor rows 380 is to support the tunnel steel frame 20 from the outside of the tunnel 10 obliquely upward, and each second foot-locking anchor row 380 includes at least two second foot-locking anchors (not shown). This embodiment is provided with second lock foot stock row 380 through the hunch foot department at lower step 130 to two rows are no less than to the quantity of second lock foot stock row 380, and every row second lock foot stock row 380 includes two piece at least second lock foot stocks, then with second lock foot stock with tunnel steelframe 20 fixed connection, for example with second lock foot stock welding on tunnel steelframe 20, so can further improve whole tunnel steelframe 20's support intensity, and can effectively prevent that the softening of soil property country rock rainwater leads to bearing capacity to descend and the settlement that arouses, tunnel steelframe 20's settlement when reducing the excavation simultaneously.
Further, the number of the first foot-locking anchor rod rows 330 and the number of the second foot-locking anchor rod rows 380 are two, each first foot-locking anchor rod row 330 comprises two first foot-locking anchor rods, each second foot-locking anchor rod row 380 comprises two second foot-locking anchor rods, and the spacing distance between the two first foot-locking anchor rod rows 330 and the spacing distance between the two second foot-locking anchor rod rows 380 are both set between 50cm and 80 cm; the diameter of the first foot-locking anchor rod and the diameter of the second foot-locking anchor rod are both set to be between 40mm and 45mm, and the length of the first foot-locking anchor rod and the length of the second foot-locking anchor rod are both set to be between 400mm and 500 mm. It will be appreciated that in other embodiments, the number of the first foot bolt row 330 and the second foot bolt row 380 may be set to other values, for example, three or four rows, etc., but in view of economic issues, it is preferable to suggest two rows. Similarly, the number, diameter, length, etc. of each of the first foot-locking anchor rod row 330 and the second foot-locking anchor rod row 380 can be set according to actual needs,
as a specific example, the length and width of the first connecting plate 340 and the second connecting plate 350 are both between 220mm and 300mm, and the thickness of the first connecting plate 340 and the second connecting plate 350 is set between 10mm and 20 mm. It is understood that the length, width and thickness of the first and second connection plates 340 and 350 may be set to other values according to actual needs by those skilled in the art to enhance the structural strength of the position where the anti-settling assembly 310 is arranged.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (9)
1. A tunnel steel frame reinforcing structure is characterized by comprising an anti-settling component arranged at a step boundary joint of a tunnel steel frame, wherein the anti-settling component is fixedly connected with a joint of the tunnel steel frame; the anti-settling assembly comprises a supporting piece and at least two first pin locking anchor rod rows, wherein the supporting piece extends along the tunnel direction and abuts against the inner wall surface of the excavated tunnel;
the support piece comprises a support plate used for being abutted against the inner wall surface of the excavated tunnel and a connecting part fixedly connected with a joint of the tunnel steel frame; the first foot locking anchor rod row comprises a supporting end and a grounding end which are arranged oppositely, the supporting end is supported on the tunnel steel frame above the supporting piece, and the supporting direction of the first foot locking anchor rod row is that the tunnel steel frame is supported from the outer side of the tunnel upwards in an inclined mode; each first foot-locking anchor rod row comprises at least two first foot-locking anchor rods.
2. The tunnel steel frame reinforced structure of claim 1, wherein the anti-settling assembly further comprises a first connecting plate fixed to the top of the connecting portion and a second connecting plate fixed to the bottom of the connecting portion, the first connecting plate and the second connecting plate are correspondingly arranged, and the first connecting plate and the second connecting plate are respectively fixedly connected with the tunnel steel frames on two sides of the connecting portion.
3. The tunnel steel frame reinforcing structure according to claim 2, wherein the supporting member is a channel steel, an opening of the channel steel is arranged upwards, an extending direction of the channel steel is arranged along an extending direction of the tunnel, the supporting plate is a side plate of the channel steel, the side plate is close to one side of an inner wall surface of the tunnel, and the connecting part is a bottom plate of the channel steel; the width of the channel steel is larger than the thickness of the tunnel steel frame; the bottom plate of channel-section steel has seted up at least one and has supplied the first connecting hole that the bolt runs through, first connecting plate with the second connecting plate seted up respectively with the corresponding second connecting hole of first connecting hole, first connecting plate with the second connecting plate runs through the bolt respectively the second connecting hole and first connecting hole with channel-section steel fixed connection.
4. The tunnel steel frame reinforcing structure of claim 3, wherein the length of the channel steel is greater than the width of the tunnel steel frame.
5. The tunnel steel frame reinforced structure of claim 2, wherein the supporting members are H-shaped steel, the openings of the H-shaped steel are vertically arranged, the extending direction of the H-shaped steel is arranged along the extending direction of the tunnel, the supporting plates are side plates of the H-shaped steel on the side close to the inner wall surface of the tunnel, and the connecting parts are bottom plates of the H-shaped steel; the width of the H-shaped steel is larger than the thickness of the tunnel steel frame, at least one third connecting hole for a bolt to penetrate through is formed in a bottom plate of the H-shaped steel, fourth connecting holes corresponding to the third connecting holes are formed in the first connecting plate and the second connecting plate respectively, and the first connecting plate and the second connecting plate penetrate through the fourth connecting holes and the third connecting holes and are fixedly connected with the H-shaped steel through bolts respectively.
6. The tunnel steel frame reinforced structure of claim 2, wherein the first and second connection plates each have a length that is greater than a width of the tunnel steel frame, and wherein the first and second connection plates each have a width that is greater than a thickness of the tunnel steel frame.
7. The tunnel steel frame reinforced structure of claim 2, further comprising at least two second foot-locking anchor rows supported at the arch foot of the lower step, wherein the support ends of the second foot-locking anchor rows are supported on the tunnel steel frame at the arch foot of the lower step, the second foot-locking anchor rows are supported in a direction to support the tunnel steel frame obliquely upward from the outside of the tunnel, and each second foot-locking anchor row comprises at least two second foot-locking anchors.
8. The tunnel steel frame reinforcing structure according to claim 7, wherein the number of the first foot-locking anchor rod rows and the number of the second foot-locking anchor rod rows are two, each first foot-locking anchor rod row comprises two first foot-locking anchor rods, each second foot-locking anchor rod row comprises two second foot-locking anchor rods, and the spacing distance between the two first foot-locking anchor rod rows and the spacing distance between the two second foot-locking anchor rod rows are both set to be between 50cm and 80 cm; the diameter of the first foot-locking anchor rod and the diameter of the second foot-locking anchor rod are both set to be between 40mm and 45mm, and the length of the first foot-locking anchor rod and the length of the second foot-locking anchor rod are both set to be between 400mm and 500 mm.
9. The tunnel steel frame reinforced structure of claim 6, wherein the first and second connection plates each have a length and width between 220mm-300mm, and a thickness between 10mm-20 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220493901.9U CN216305959U (en) | 2022-03-09 | 2022-03-09 | Tunnel steelframe additional strengthening |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220493901.9U CN216305959U (en) | 2022-03-09 | 2022-03-09 | Tunnel steelframe additional strengthening |
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| Publication Number | Publication Date |
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| CN216305959U true CN216305959U (en) | 2022-04-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202220493901.9U Active CN216305959U (en) | 2022-03-09 | 2022-03-09 | Tunnel steelframe additional strengthening |
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