CN211201989U - Sleeve lining for tunnel secondary lining renovation construction - Google Patents

Sleeve lining for tunnel secondary lining renovation construction Download PDF

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Publication number
CN211201989U
CN211201989U CN201922142836.6U CN201922142836U CN211201989U CN 211201989 U CN211201989 U CN 211201989U CN 201922142836 U CN201922142836 U CN 201922142836U CN 211201989 U CN211201989 U CN 211201989U
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China
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arch
tunnel
lining
steel
steel bar
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CN201922142836.6U
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Inventor
刘德兵
李瑛�
常运超
陈世轩
李世军
李向峰
田广阔
苟冰
张峰
常得胜
王存宝
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Sixth Engineering Co Ltd of China Railway 20th Bureau Group Co Ltd
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Sixth Engineering Co Ltd of China Railway 20th Bureau Group Co Ltd
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Abstract

The utility model discloses a sleeve lining for tunnel secondary lining renovation construction, which comprises a concrete sleeve lining, a plurality of steel trusses and an arch-shaped steel bar structure, wherein the steel trusses are arranged in the concrete sleeve lining from front to back along the longitudinal extension direction of a tunnel; the arched steel bar structure comprises a plurality of annular steel bar groups and a plurality of longitudinal steel bars, each annular steel bar group comprises a plurality of anchoring stirrups, one outer annular steel bar and one inner annular steel bar, and an inner wing plate of the profile steel arch is welded and fixed with the longitudinal steel bars. The utility model has the advantages of reasonable design and the construction is simple and convenient, excellent in use effect, set up arch steelframe and arch steel bar structure in the concrete lining, can effectively improve the joint strength of bushing and tunnel secondary lining to arch steelframe and arch steel bar structure are connected as the integral atress structure of an organic whole formation concrete bushing, further improve effectively to improve the supporting strength and the effect of strutting of the shaping bushing of being under construction, ensure the renovation effect of tunnel two bushings.

Description

Sleeve lining for tunnel secondary lining renovation construction
Technical Field
The utility model belongs to the technical field of the tunnel construction, especially, relate to a two lining renovation in tunnel are with cover lining.
Background
With the continuous development and development of high-speed railways, single-hole double-track tunnels passing through complex geological conditions are more and more common, so that tunnel defects are also increased, the vault of the tunnel is extruded by concrete to cause the problems of block falling of lining surfaces, upper parts of two lining concrete to be hollow, steel frame distortion and deformation and the like, the collapse risk is further increased, and the driving safety is seriously threatened. Karst geology is mainly due to the fact that surface water and underground water are subjected to runoff, replenishment, permeation, circulation and other processes to carry out chemical dissolution treatment on a soluble rock stratum and products under the influence of mechanical damage. After the construction of the tunnel penetrating the karst stratum (namely the karst stratum tunnel), the tunnel needs to be cleared up, the tunnel is more damaged, particularly, the geology of the tunnel body penetrating area is complex, the stratum of the tunnel body penetrating area has the characteristics of water enrichment, karst cave, fault, high ground stress, dangerous rockfall, bedding bias and the like, and the tunnel secondary lining damage needs to be timely cleared up.
When the tunnel secondary lining diseases are actually remedied, a method of lining is generally adopted. The lining is mainly used for solving the problem of secondary lining of the tunnel (namely secondary lining of the tunnel), when the quality of the secondary lining of the tunnel is unqualified, the lining can be applied to the structural surface of the original secondary lining, and then the gap is filled by grouting. During actual construction, the lining is that concrete with a certain thickness is poured on the inner surface of the existing lining (particularly the tunnel secondary lining) and bears surrounding rock pressure together with the existing lining, and the lining can effectively prevent the existing lining from further cracking, damaging and deforming and can play a role of water prevention. However, when the bushing is adopted to treat the two-lining damage of the karst stratum tunnel under the complex geological condition at present, a set of unified, standard and standardized construction method is not available, so that various problems of random construction operation, low construction efficiency, incapability of ensuring the quality of the formed bushing during actual construction and the like inevitably exist, and the steel bar structure in the bushing has the defects of unreasonable structural design, inconvenience in construction, poor use effect and the like.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem lie in to above-mentioned prior art not enough, a two lining renovation in tunnel are used lining, its structural design is reasonable and the construction is simple and convenient, excellent in use effect, set up arch steelframe and arch steel bar structure in the concrete lining, can effectively improve the joint strength of lining and tunnel secondary lining, and arch steelframe and arch steel bar structure are connected and are formed the integral atress structure in the concrete lining as an organic whole, further improve effectively to improve the supporting intensity and the supporting effect of the shaping lining of being under construction, ensure the renovation effect of two linings in tunnel.
In order to solve the technical problem, the utility model discloses a technical scheme is: the utility model provides a two lining renovation in tunnel are with cover lining which characterized in that: the tunnel comprises a concrete lining which is arranged in a tunnel section to be treated and is formed by pouring concrete, a plurality of profile steel arch frames which are arranged in the concrete lining from front to back along the longitudinal extension direction of the tunnel, and an arch-shaped steel bar structure which is arranged in the concrete lining; the concrete lining cloth is arranged on the inner side of a tunnel secondary lining of the tunnel section to be renovated, the tunnel secondary lining is a full-section supporting structure for performing full-section supporting on the tunnel section to be renovated, and the tunnel secondary lining is a reinforced concrete lining; the tunnel secondary lining comprises an arch wall secondary lining for supporting an arch wall of the tunnel section to be renovated and a tunnel inverted arch arranged at the bottom of the tunnel section to be renovated, wherein the tunnel inverted arch is positioned right below the arch wall secondary lining and is connected with the arch wall secondary lining into a whole; a tunnel primary supporting structure for carrying out primary supporting on the tunnel section to be renovated is arranged on the outer side of the tunnel secondary lining, and the tunnel primary supporting structure and the tunnel secondary lining form a tunnel supporting structure of the tunnel section to be renovated; the concrete sleeve lining and the secondary lining of the arch wall arranged on the outer side of the concrete sleeve lining are cast into a whole, and the shape of the cross section of the concrete sleeve lining is the same as that of the cross section of the secondary lining of the arch wall; a plurality of profile steel arch frames are all poured in the concrete sleeve lining;
a plurality of profile steel arches are uniformly distributed, and each profile steel arch is uniformly distributed on the cross section of one tunnel of the tunnel section to be treated; a plurality of steel arches are supported on the inner wall of the secondary lining of the tunnel, and the steel arches are identical in structure and size; the profile steel arch is an arch support supported in the secondary lining of the arch wall, and the shape of the cross section of the profile steel arch is the same as that of the cross section of the secondary lining of the arch wall;
each structural steel arch is formed by bending a I-steel, the web plates of the I-steel are vertically arranged, one wing plate of the I-steel is an outer side wing plate supported on the inner wall of the secondary lining of the arch wall, and the other wing plate of the I-steel is an inner side wing plate positioned on the inner side of the outer side wing plate; each steel arch is fixedly arranged on the inner wall of the secondary lining of the arch wall through an arch fixing structure; each arch fixing structure comprises a plurality of arch fixing pieces, the structure and the size of each arch fixing piece are the same, the plurality of arch fixing pieces are uniformly distributed on the same tunnel cross section of a tunnel section to be renovated, the plurality of arch fixing pieces are distributed along the outer contour line of the profile steel arch, and the plurality of arch fixing pieces form a wing plate fixing structure for fixing an outer wing plate;
each arch center fixing piece comprises a front buckling piece and a rear buckling piece which are symmetrically arranged, and the two buckling pieces are buckled on the front side and the rear side of the outer side wing plate respectively; each buckling piece comprises a buckle buckled on an outer wing plate and a fastener for fixing the buckle on the tunnel supporting structure, the buckle is formed by bending a straight steel plate and is divided into a buckling plate buckled on the outer wing plate and a fixing plate distributed on the inner wall of the secondary lining of the arch wall, the fixing plate is positioned on the outer side of the buckling plate, and the fastener is installed on the fixing plate; each fastener is vertically arranged with the inner wall of the arch wall secondary lining at the position of the fastener, and each fastener extends out of the tunnel supporting structure from inside to outside; the fastening piece is a chemical anchor bolt, and the fixing plate is provided with a mounting hole for mounting the chemical anchor bolt;
the arched reinforcing steel bar structure comprises a plurality of annular reinforcing steel bar groups and a plurality of longitudinal reinforcing steel bars, wherein the annular reinforcing steel bar groups are arranged in a tunnel section to be renovated from front to back along the longitudinal extension direction of the tunnel, the longitudinal reinforcing steel bars are horizontally arranged, the longitudinal reinforcing steel bars are identical in length, and the front ends of the longitudinal reinforcing steel bars are uniformly arranged on the same tunnel cross section of the tunnel section to be renovated; the structure and the size of the plurality of annular steel bar groups are the same, each annular steel bar group is uniformly distributed on the cross section of one tunnel of a tunnel section to be renovated, the plurality of annular steel bar groups are fixedly connected into a whole through a plurality of longitudinal steel bars, and each longitudinal steel bar is positioned on the inner side of the plurality of annular steel bar groups;
each steel arch is uniformly distributed between two adjacent circumferential steel bar groups, and a plurality of circumferential steel bar groups are uniformly distributed between two adjacent steel arches; each structural steel arch is positioned outside the longitudinal steel bars, and an inner wing plate of each structural steel arch is welded and fixed with the longitudinal steel bars into a whole;
each circumferential steel bar group comprises a plurality of anchoring stirrups, an outer circumferential steel bar and an inner circumferential steel bar, wherein the outer circumferential steel bar is arranged on the inner wall of the secondary lining of the tunnel, and the inner circumferential steel bar is arranged on the inner side of the outer circumferential steel bar; the outer circumferential steel bars and the inner circumferential steel bars in each circumferential steel bar group are arranged on the same cross section of a tunnel section to be renovated, the outer circumferential steel bars and the inner circumferential steel bars are both arch-shaped steel bars arranged on the inner side of the secondary lining of the arch wall, and the shapes of the outer circumferential steel bars and the inner circumferential steel bars are the same as the shape of the cross section of the secondary lining of the arch wall; a plurality of anchoring stirrups in each circumferential reinforcing steel bar group are uniformly distributed on the same cross section of a tunnel section to be renovated, the plurality of anchoring stirrups are distributed along the inner contour line of the secondary lining of the arch wall, and each anchoring stirrup is vertically distributed with the inner wall of the secondary lining of the arch wall at the distributed position; a plurality of anchoring stirrups in each circumferential reinforcing steel bar group are fixedly connected into a whole through outer circumferential reinforcing steel bars and inner circumferential reinforcing steel bars;
each anchoring stirrup is divided into an outer anchoring section anchored in the secondary lining of the arch wall and an inner connecting section positioned on the inner side of the outer anchoring section, and the outer end of the outer anchoring section is an anchoring head formed by bending; the inner end of the internal connecting section is a hook formed after bending, the hook is hung on the inner circumferential steel bar and fixedly connected with the inner circumferential steel bar through spot welding; the outer end of the inner connecting section is connected with the outer circumferential steel bar;
the plurality of longitudinal steel bars are distributed along the inner contour line of the secondary lining of the arch wall, and each longitudinal steel bar is connected with the plurality of outer circumferential steel bars in the arch-shaped steel bar structure;
the internal connection section, the longitudinal steel bar, the outer circumferential steel bar and the inner circumferential steel bar in the arch-shaped steel bar structure are all poured in the concrete sleeve lining.
The sleeve lining for tunnel secondary lining renovation construction is characterized in that: the number of the fasteners in each fastener is one, and the fasteners are fixed in the middle of the fixing plate.
The sleeve lining for tunnel secondary lining renovation construction is characterized in that: supporting grooves for supporting the arch feet of the steel arch centering are formed in the bottoms of the left side and the right side of the secondary lining of the arch wall, and the supporting grooves are mounting grooves formed after concrete at the bottom of the secondary lining of the arch wall is chiseled; the bottom surface of the supporting groove is a horizontal plane, and is positioned below the upper surface of a ditch cable groove in the tunnel section to be renovated;
the left arch foot and the right arch foot of the arch-shaped steel bar structure are supported on the bottom surface of the supporting groove.
The sleeve lining for tunnel secondary lining renovation construction is characterized in that: the steel bar support also comprises a left bottom joint reinforcing bar group and a right bottom joint reinforcing bar group, wherein each bottom joint reinforcing bar group is uniformly distributed at the bottom of one support groove;
each bottom stubble connecting reinforcing steel bar group comprises a plurality of groups of stubble connecting reinforcing steel bars which are arranged from front to back along the longitudinal extension direction of the tunnel, each group of stubble connecting reinforcing steel bars comprises a left stubble connecting reinforcing steel bar and a right stubble connecting reinforcing steel bar which are arranged on the cross section of the same tunnel, and the two stubble connecting reinforcing steel bars are arranged in the vertical direction; each stubble connecting reinforcing steel bar is divided into a lower anchoring section and an upper exposed section positioned above the lower anchoring section by taking the bottom surface of the supporting groove as a boundary, and the lower anchoring section is anchored in the secondary lining of the tunnel; the lower parts of the two upper exposed sections in each group of the jointed reinforcing steel bars are connected through a horizontal connecting rib; all the stubble reinforcing steel bars in each bottom stubble reinforcing steel bar group are distributed in left and right two rows, and each row of the stubble reinforcing steel bars comprises a plurality of stubble reinforcing steel bars which are distributed from front to back along the longitudinal extension direction of the tunnel;
and the upper exposed section and the horizontal connecting rib in the bottom joint reinforcing steel bar group are both poured in the concrete sleeve lining.
The sleeve lining for tunnel secondary lining renovation construction is characterized in that: the excavation section of the tunnel section to be renovated is larger than 100m2
The plurality of longitudinal steel bars are uniformly distributed, and the circumferential distance between every two adjacent longitudinal steel bars is 1.8-2.2 m.
The sleeve lining for tunnel secondary lining renovation construction is characterized in that: the thickness of the secondary lining of the arch wall is 40 cm-50 cm, and the length of the outer anchoring section is 18 cm-22 cm.
The sleeve lining for tunnel secondary lining renovation construction is characterized in that: the lengths of the lower anchoring section and the upper exposed section are both 25 cm-35 cm.
The sleeve lining for tunnel secondary lining renovation construction is characterized in that: the distance between two front and back adjacent shaped steel arches is 0.8-1.2 m.
The sleeve lining for tunnel secondary lining renovation construction is characterized in that: the straight steel plate is a rectangular steel plate;
the length of the buckle plate in the front-back direction is 13-15 cm, and the width of the buckle plate is 10-15 cm.
The sleeve lining for tunnel secondary lining renovation construction is characterized in that: the outer side wing plates of two front and rear adjacent section steel arch frames are connected through a plurality of longitudinal connecting steel bars which are horizontally arranged and are uniformly distributed on the same tunnel cross section of a tunnel section to be renovated, and the plurality of longitudinal connecting steel bars are arranged along the outer contour line of the section steel arch frames; and the front end and the rear end of each longitudinal connecting steel bar are welded and fixed on the inner wall of one outer side wing plate.
Compared with the prior art, the utility model has the following advantage:
1. the structure design is reasonable, the construction is simple and convenient, and the investment construction cost is low.
2. The adopted buckling parts are simple in structure, reasonable in design, simple and convenient to process and manufacture and low in investment cost, and each buckling part comprises a buckle buckled on the outer wing plate and a fastener for fixing the buckle on the tunnel supporting structure.
3. The buckling piece is simple and convenient to install actually and good in fixing effect, only the buckling plate in the fastener needs to be buckled and pressed on the outer side wing plate of the fixed profile steel arch, then the fixing plate in the fastener is fixed through the fastener, labor and time are saved, and the fixing is firm, meanwhile, the fastener and the outer side wing plate of the fixed profile steel arch are fixed in a buckling and pressing mode, the fixing is simple, convenient and reliable, fixing inconvenience can be effectively avoided when the anchoring reinforcing steel bars and the profile steel arch are fixed, and the problems that the supporting strength of the profile steel arch is affected by damage caused to the structure of the profile steel arch in the fixing process and after the fixing is completed cannot be avoided.
4. The profile steel arch is fixed through the arch fixing part, each arch fixing part adopts a buckling and pressing type fixing mode that two fasteners symmetrically arranged at the front and the back are adopted to fix the outer side wing plate of the profile steel arch, the fixing mode does not need to provide a fixing hole on the profile steel arch or weld with a steel bar, so that any damage to the profile steel arch can not be effectively avoided, and the profile steel arch and the arch fixing part are not in a direct fixing relation, so that the fixed profile steel arch is simple and convenient to adjust in position, the profile steel arch can be conveniently and quickly and accurately installed, each profile steel arch is ensured to be accurately installed in place, and each profile steel arch is positioned on a cross section of a tunnel section to be renovated.
5. The profile steel bow member is simple and convenient to install and excellent in use effect, the buckling component that lays through two symmetries around constitutes the bow member mounting and fixes the outside pterygoid lamina of profile steel bow member, can accomplish the fixed process of profile steel bow member portably, fast to ensure the installation quality of fixed profile steel bow member, economical and practical.
6. The arch reinforcing bar structure that adopts reasonable in design, simple installation and excellent in use effect, divide into a plurality of hoop reinforcing bar groups and the multichannel longitudinal reinforcement of laying backward by preceding with the arch reinforcing bar structure in the cover lining, every hoop reinforcing bar group includes that the multichannel is laid and is located the anchor stirrup on same tunnel cross section, lay outside hoop reinforcing bar and the inboard hoop reinforcing bar of laying outside hoop reinforcing bar on tunnel secondary lining inner wall together, can be as an organic whole with the cover lining of being under construction and tunnel secondary lining fastening connection, and can effectively improve the joint strength of the cover lining of being under construction and tunnel secondary lining, ensure the cover lining effect of strutting.
7. When the arched steel bar structure is arranged in the concrete lining, the bottom connecting steel bar groups are arranged on the arch springing at the left side and the right side of the arched steel bar structure, so that the connection strength and the connection quality between the constructed lining and the tunnel secondary lining are further improved, and the actual installation is simple and convenient.
8. The construction is simple and convenient and the result of use is good, sets up arch steelframe and arch steel bar structure in the concrete lining, can effectively improve the joint strength of bushing and tunnel secondary lining to arch steelframe and arch steel bar structure are connected and are formed the integral atress structure in the concrete bushing as an organic whole, and the further improvement effectively improves the support intensity and the support effect of the shaping bushing of being under construction, guarantees the renovation effect of tunnel secondary lining.
The technical solution of the present invention is further described in detail by the accompanying drawings and examples.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic view of the longitudinal structure of the multi-pin steel arch of the present invention.
Fig. 3 is a schematic view of the vertical plane layout position of the profile steel arch of the present invention.
Fig. 4 is a reference diagram of the use state of the fastening device of the present invention.
Fig. 5 is a schematic plan view of the fastener of the present invention.
Fig. 6 is a schematic structural view of the steel arch of the present invention.
Fig. 7 is a schematic structural view of the support groove of the present invention.
Fig. 8 is the connection state diagram of the longitudinal connecting steel bar between the front and back two adjacent steel arch frames of the utility model.
Fig. 9 is a schematic diagram of the arrangement position of the concrete lining of the present invention.
Fig. 10 is the utility model discloses arch steel bar structure lays the position schematic diagram.
Fig. 11 is the structure diagram of the arch-shaped steel bar structure of the present invention.
Fig. 12 is the utility model discloses the tunnel secondary lining goes up the connection state schematic diagram of anchor stirrup and longitudinal reinforcement.
Fig. 13 is a schematic structural view of the anchoring stirrup of the present invention.
Fig. 14 is a schematic diagram of the layout position of the bottom connecting reinforcing steel bar group of the present invention.
Fig. 15 is the schematic structural view of each group of the stubble-connecting reinforcing steel bars of the present invention.
Fig. 16 is a schematic view of the position of the flat surface of the connecting reinforcing steel bar on the supporting groove of the present invention.
Description of reference numerals:
1, secondary lining of a tunnel; 2-the tunnel section needs to be renovated; 3-1-longitudinal reinforcement;
3-2-outer circumferential reinforcing steel bars; 3-inner side circumferential reinforcing steel bars; 3-4-anchoring stirrups;
3-41-hook; 3-42-an anchoring head; 3-5-connecting reinforcing steel bars;
3-6-horizontal connecting ribs; 5, a primary tunnel supporting structure;
6-supporting the groove; 7-ditch cable trough; 8, concrete lining;
9-steel arch centering; 9-1-outer wing panel; 9-2-inner wing plate;
10, buckling parts; 10-1-fasteners; 10-2-fasteners;
and 11, longitudinally connecting the reinforcing steel bars.
Detailed Description
As shown in fig. 1 and 9, the utility model comprises a concrete lining 8 which is arranged in a tunnel section 2 to be treated and is formed by pouring concrete, a plurality of steel arches 9 which are arranged in the concrete lining 8 from front to back along the longitudinal extension direction of the tunnel, and an arch-shaped steel bar structure which is arranged in the concrete lining 8; the concrete sleeve linings 8 are arranged on the inner sides of the tunnel secondary linings 1 of the tunnel sections 2 to be renovated, the tunnel secondary linings 1 are full-section supporting structures for performing full-section supporting on the tunnel sections 2 to be renovated, and the tunnel secondary linings 1 are reinforced concrete linings; the tunnel secondary lining 1 comprises an arch wall secondary lining for supporting an arch wall of the tunnel section 2 to be renovated and a tunnel inverted arch arranged at the bottom of the tunnel section 2 to be renovated, wherein the tunnel inverted arch is positioned right below the arch wall secondary lining and is connected into a whole; a tunnel primary supporting structure 5 for carrying out primary supporting on the tunnel section 2 to be renovated is arranged on the outer side of the tunnel secondary lining 1, and the tunnel primary supporting structure 5 and the tunnel secondary lining 1 form a tunnel supporting structure of the tunnel section 2 to be renovated; the concrete lining 8 and the secondary lining of the arch wall arranged on the outer side of the concrete lining are cast into a whole, and the shape of the cross section of the concrete lining 8 is the same as that of the cross section of the secondary lining of the arch wall; a plurality of profile steel arch frames 9 are all poured in the concrete sleeve liner 8;
referring to fig. 2 and 3, a plurality of steel arches 9 are uniformly distributed, and each steel arch 9 is uniformly distributed on the cross section of one tunnel of the tunnel section 2 to be treated; a plurality of steel arches 9 are all supported on the inner wall of the tunnel secondary lining 1, and the structures and the sizes of the plurality of steel arches 9 are the same; the profile steel arch 9 is an arch support supported in the secondary lining of the arch wall, and the shape of the cross section of the profile steel arch 9 is the same as that of the cross section of the secondary lining of the arch wall;
referring to fig. 6, each structural steel arch 9 is formed by bending a beam of i-steel, the web of the i-steel is vertically arranged, one wing plate of the i-steel is an outer wing plate 9-1 supported on the inner wall of the secondary lining of the arch wall, and the other wing plate of the i-steel is an inner wing plate 9-2 positioned at the inner side of the outer wing plate 9-1; each steel arch 9 is fixedly arranged on the inner wall of the secondary lining of the arch wall through an arch fixing structure; each arch fixing structure comprises a plurality of arch fixing pieces, the structure and the size of the plurality of arch fixing pieces are the same, the plurality of arch fixing pieces are uniformly distributed on the same tunnel cross section of the tunnel section 2 to be rectified, the plurality of arch fixing pieces are distributed along the outer contour line of the profile steel arch 9, and the plurality of arch fixing pieces form a wing plate fixing structure for fixing the outer wing plate 9-1;
each arch center fixing piece comprises a front buckling piece 10 and a rear buckling piece 10 which are symmetrically arranged, and the two buckling pieces 10 are buckled on the front side and the rear side of the outer wing plate 9-1 respectively; each fastening piece 10 comprises a fastening piece 10-1 fastened on an outer wing plate 9-1 and a fastening piece 10-2 for fixing the fastening piece 10-1 on the tunnel supporting structure, the fastening piece 10-1 is formed by bending a straight steel plate and is divided into a fastening plate fastened on the outer wing plate 9-1 and a fixing plate arranged on the inner wall of the secondary lining of the arch wall, the fixing plate is positioned on the outer side of the fastening plate, and the fastening piece 10-2 is installed on the fixing plate; each fastener 10-2 is vertically arranged with the inner wall of the secondary lining of the arch wall at the position where the fastener is positioned, and each fastener 10-2 extends out to the outer side of the tunnel supporting structure from inside to outside; the fastening piece 10-2 is a chemical anchor bolt, and a mounting hole for mounting the chemical anchor bolt is formed in the fixing plate;
as shown in fig. 10, 11 and 12, the arch-shaped reinforcing steel bar structure comprises a plurality of circumferential reinforcing steel bar groups which are arranged in the tunnel section 2 to be renovated from front to back along the longitudinal extension direction of the tunnel and a plurality of longitudinal reinforcing steel bars 3-1 which are all horizontally arranged, wherein the lengths of the plurality of longitudinal reinforcing steel bars 3-1 are the same, and the front ends of the longitudinal reinforcing steel bars are uniformly arranged on the same tunnel cross section of the tunnel section 2 to be renovated; the structure and the size of the plurality of annular steel bar groups are the same, each annular steel bar group is uniformly distributed on the cross section of one tunnel of the tunnel section 2 to be renovated, the plurality of annular steel bar groups are fastened and connected into a whole through a plurality of longitudinal steel bars 3-1, and each longitudinal steel bar 3-1 is positioned at the inner side of the plurality of annular steel bar groups;
each structural steel arch 9 is uniformly distributed between two adjacent circumferential steel bar groups in the front and the back, and a plurality of circumferential steel bar groups are uniformly distributed between two adjacent structural steel arches 9 in the front and the back; each structural steel arch 9 is positioned outside the longitudinal steel bars 3-1, and the inner side wing plates 9-2 of each structural steel arch 9 are welded and fixed with the longitudinal steel bars 3-1 into a whole, as shown in detail in figure 12;
each annular steel bar group comprises a plurality of anchoring stirrups 3-4, an outer annular steel bar 3-2 arranged on the inner wall of the tunnel secondary lining 1, and an inner annular steel bar 3-3 arranged on the inner side of the outer annular steel bar 3-2; the outer circumferential steel bars 3-2 and the inner circumferential steel bars 3-3 in each circumferential steel bar group are arranged on the same cross section of the tunnel section 2 to be renovated, and are both arch-shaped steel bars arranged on the inner side of the secondary lining of the arch wall, and the shapes of the outer circumferential steel bars 3-2 and the inner circumferential steel bars 3-3 are the same as the shape of the cross section of the secondary lining of the arch wall; a plurality of anchoring stirrups 3-4 in each circumferential reinforcing steel bar group are uniformly distributed on the same cross section of the tunnel section 2 to be rectified, the plurality of anchoring stirrups 3-4 are distributed along the inner contour line of the secondary lining of the arch wall, and each anchoring stirrup 3-4 is vertically distributed with the inner wall of the secondary lining of the arch wall at the distributed position; a plurality of anchoring stirrups 3-4 in each circumferential steel bar group are fixedly connected into a whole through outer circumferential steel bars 3-2 and inner circumferential steel bars 3-3;
as shown in fig. 13, each of the anchoring stirrups 3 to 4 is divided into an outer anchoring section anchored in the secondary lining of the arch wall and an inner connecting section located inside the outer anchoring section, and the outer end of the outer anchoring section is an anchoring head 3 to 42 formed by bending; the inner end of the internal connecting section is provided with a hook 3-41 formed after bending, the hook 3-41 is hung on the inner side annular steel bar 3-3 and fixedly connected with the inner side annular steel bar 3-3 through spot welding; the outer end of the inner connecting section is connected with an outer circumferential steel bar 3-2;
the plurality of longitudinal steel bars 3-1 are distributed along the inner contour line of the secondary lining of the arch wall, and each longitudinal steel bar 3-1 is connected with the plurality of outer circumferential steel bars 3-2 in the arch steel bar structure;
the internal connecting section, the longitudinal steel bar 3-1, the outer circumferential steel bar 3-2 and the inner circumferential steel bar 3-3 in the arch-shaped steel bar structure are all poured in the concrete lining 8.
As shown in fig. 4 and 5, each of the fastening members 10 includes one fastening member 10-2, and the fastening member 10-2 is fixed to the middle of the fixing plate. The practical processing is simple and convenient, and the fixation is firm.
As shown in fig. 7, the bottom of the left side and the bottom of the secondary lining of the arch wall are both provided with supporting grooves 6 for supporting the arch feet of a steel arch 9, and the supporting grooves 6 are mounting grooves formed by chiseling concrete at the bottom of the secondary lining of the arch wall; the bottom surface of the supporting groove 6 is a horizontal plane, and the bottom surface of the supporting groove 6 is positioned below the upper surface of a ditch cable groove 7 in the tunnel section 2 to be renovated. And the vertical distance between the bottom surface of the support groove 6 and the upper surface of the cable groove 7 of the ditch is not less than 5 cm.
In this embodiment, the vertical distance between the bottom surface of the support groove 6 and the upper surface of the cable groove 7 of the ditch is 5 cm.
During actual construction, the vertical distance between the bottom surface of the support groove 6 and the upper surface of the cable groove 7 of the ditch can be correspondingly adjusted according to specific requirements.
The excavation section of the tunnel section 2 to be renovated is more than 100m2. And the tunnel section 2 which needs to be renovated is a tunnel section which has diseases on the tunnel secondary lining 1 and needs to be renovated. In this embodiment, the excavation width of the tunnel section 2 to be renovated is 15m to 16m, and the excavation height of the tunnel section 2 to be renovated is 12.5m to 13.5 m.
In this embodiment, a plurality of arch fixing members in the arch fixing structure are uniformly arranged.
The circumferential distance between two adjacent arch fixing pieces in the arch fixing structure is 0.8-1.2 m. In this embodiment, the circumferential distance between two adjacent arch fixing pieces in the arch fixing structure is 1 m. During actual installation, the circumferential distance between two adjacent arch fixing parts in the arch fixing structure can be correspondingly adjusted according to specific requirements.
As shown in fig. 5, in the present embodiment, the flat steel plate is a rectangular steel plate.
In order to be firmly fixed, the length of the buckling plate in the front-back direction is 13-15 cm, and the width of the buckling plate is 10-15 cm. Wherein the front-back length of the fixing plate is 9-11 cm.
In this embodiment, the length of the buckle plate in the forward and backward direction is L and L is 14cm, the length of the fixing plate in the forward and backward direction is L1 and L1 is 10cm, and the width of the buckle plate is D and D is 12 cm., the values of L, L1 and D can be adjusted accordingly according to specific needs during actual machining.
As shown in fig. 2, all the arch frame fixing pieces on the plurality of section steel arch frames 9 are arranged in a plurality of rows, and each row of arch frame fixing pieces comprises a plurality of arch frame fixing pieces which are arranged from front to back along the longitudinal extension direction of the tunnel.
During actual construction, the distance between two front and rear adjacent shaped steel arches 9 is 0.8-1.2 m. In this embodiment, the distance between two adjacent front and rear steel arches 9 is 1 m.
In order to improve the integrity and the supporting effect of the constructed forming sleeve liner, as shown in fig. 8, the outer side wing plates 9-1 of two front and rear adjacent section steel arch frames 9 are connected through a plurality of longitudinal connecting steel bars 11, the plurality of longitudinal connecting steel bars 11 are horizontally arranged and are uniformly distributed on the same tunnel cross section of the tunnel section 2 to be treated, and the plurality of longitudinal connecting steel bars 11 are arranged along the outer contour line of the section steel arch frame 9; the front end and the rear end of each longitudinal connecting steel bar 11 are welded and fixed on the inner wall of one outer wing plate 9-1. When actually fixing, each longitudinal connecting steel bar 11 is located between two adjacent arch fixing pieces in the arch fixing structure.
In order to facilitate the processing and manufacturing, in this embodiment, each of the profile steel arches 9 is formed by splicing a plurality of i-shaped steel segments arranged on the same vertical surface.
During actual construction, the left and right arch springings of the arch-shaped steel bar structure are supported on the bottom surface of one support groove 6, specifically, the left and right arch springings of the outer circumferential steel bar 3-2 and the inner circumferential steel bar 3-3 are supported on the bottom surface of one support groove 6.
As shown in fig. 1, the utility model also comprises a left bottom stubbled reinforcement group and a right bottom stubbled reinforcement group, and each bottom stubbled reinforcement group is uniformly distributed at the bottom of one supporting groove 6;
with reference to fig. 14, 15 and 16, each of the bottom stubble reinforcement sets includes a plurality of groups of stubble reinforcements 3-5 arranged from front to back along the longitudinal extension direction of the tunnel, each group of the stubble reinforcements 3-5 includes two left and right stubble reinforcements 3-5 arranged on the cross section of the same tunnel, and the two stubble reinforcements 3-5 are arranged in the vertical direction; each of the stubble reinforcing steel bars 3-5 is divided into a lower anchoring section and an upper exposed section above the lower anchoring section by taking the bottom surface of the supporting groove 6 as a boundary, and the lower anchoring section is anchored in the tunnel secondary lining 1; the lower parts of two upper exposed sections in each group of the stubble reinforcing steel bars 3-5 are connected through a horizontal connecting bar 3-6; all the stubble reinforcing steel bars 3-5 in each bottom stubble reinforcing steel bar group are distributed in left and right two rows, and each row of the stubble reinforcing steel bars 3-5 comprises a plurality of stubble reinforcing steel bars 3-5 which are distributed from front to back along the longitudinal extension direction of the tunnel;
the upper exposed section and the horizontal connecting ribs 3-6 in the bottom connecting reinforcement group are both poured in a concrete sleeve liner 8.
The anchoring heads 3-42 of the anchoring stirrups 3-4 can effectively increase the anchoring strength of the anchoring stirrups 3-4, and the hooks 3-41 can be simply, quickly and firmly hung on the inner circumferential steel bars 3-3, so that the installation process of the inner circumferential steel bars 3-3 can be simply and conveniently completed.
During actual installation, a plurality of longitudinal steel bars 3-1 are distributed on the same arch surface. And the longitudinal steel bar 3-1 and the outer circumferential steel bar 3-2 are connected through a steel bar insulation clamp. In this embodiment, the steel bar insulation card is a cross insulation card.
In this embodiment, the two bottom connecting reinforcing steel bar groups are symmetrically arranged.
The excavation section of the tunnel section 2 to be renovated is more than 100m2. And the tunnel section 2 which needs to be renovated is a tunnel section which has diseases on the tunnel secondary lining 1 and needs to be renovated. In this embodiment, the excavation width of the tunnel section 2 to be renovated is 15m to 16m, and the excavation height of the tunnel section 2 to be renovated is 12.5m to 13.5 m. The tunnel secondary lining 1 outside is provided with tunnel primary supporting structure 5 that carries out preliminary bracing to the tunnel section 2 that needs to be renovated, tunnel primary supporting structure 5 and tunnel secondary lining 1 constitute the tunnel supporting structure of the tunnel section 2 that needs to be renovated.
During actual construction, a plurality of longitudinal steel bars 3-1 are uniformly distributed, and the circumferential distance between every two adjacent longitudinal steel bars 3-1 is 1.8-2.2 m. The plurality of anchoring stirrups 3-4 in each circumferential reinforcing steel bar group are uniformly distributed, and the circumferential distance between every two adjacent anchoring stirrups 3-4 in each circumferential reinforcing steel bar group is 20-30 cm.
In this embodiment, the circumferential distance between two adjacent longitudinal steel bars 3-1 is 2 m. The circumferential distance between 3-4 adjacent two anchoring stirrups in each circumferential reinforcement group is 25 cm.
During actual construction, the circumferential distance between two adjacent longitudinal steel bars 3-1 and the circumferential distance between two adjacent anchoring stirrups 3-4 in each circumferential steel bar group can be correspondingly adjusted according to specific requirements.
In order to improve the anchoring strength, the thickness of the secondary lining of the arch wall is 40 cm-50 cm, and the length of the anchoring section at the outer side is 18 cm-22 cm. In this embodiment, the thickness of the secondary lining of the arch wall is 45cm, and the length of the outer anchoring section is 20 cm. During actual construction, the length of the outer side anchoring section can be correspondingly adjusted according to specific requirements.
In order to facilitate construction and improve a good stubble jointing effect, a plurality of groups of the stubble jointing reinforcing steel bars 3-5 in each bottom stubble jointing reinforcing steel bar group are uniformly distributed, and the distance between every two adjacent groups of the stubble jointing reinforcing steel bars 3-5 in each bottom stubble jointing reinforcing steel bar group is 18 cm-22 cm.
In this embodiment, the distance between two stubble reinforcing bars 3-5 in each group of stubble reinforcing bars 3-5 is the same as the distance between the longitudinal reinforcing bar 3-1 and the outer circumferential reinforcing bar 3-2. And each group of the connecting reinforcing steel bars 3-5 is positioned between the two adjacent circumferential reinforcing steel bar groups in the front and the back.
The lengths of the lower anchoring section and the upper exposed section are both 25 cm-35 cm. In this embodiment, the length of the lower anchoring section and the length of the upper exposed section are both 30 cm. During actual construction, the lengths of the lower anchoring section and the upper exposed section can be respectively and correspondingly adjusted according to specific requirements.
In this embodiment, the thickness of the steel bar protection layer of the concrete lining 8 is not less than 5 cm. The concrete lining 8 is of a cast-in-place concrete structure and the cross section of the concrete lining is arched.
And the vertical distance between the bottom surface of the support groove 6 and the upper surface of the cable groove 7 of the ditch is not less than 5 cm. In this embodiment, the vertical distance between the bottom surface of the support groove 6 and the upper surface of the cable groove 7 of the ditch is 5 cm. During actual construction, the vertical distance between the bottom surface of the support groove 6 and the upper surface of the cable groove 7 of the ditch can be correspondingly adjusted according to specific requirements.
In this embodiment, the longitudinal steel bars 3-1, the outer circumferential steel bars 3-2, and the inner circumferential steel bars 3-3 are all through-length steel bars.
In this embodiment, the distance between two adjacent circumferential reinforcement groups in the front and back of the arch-shaped reinforcement structure is 15cm to 20 cm.
During actual construction, the distance between the front and back adjacent two annular steel bar groups in the arch-shaped steel bar structure can be correspondingly adjusted according to specific requirements.
In actual construction, before concrete is poured into the concrete lining 8, a plurality of steel arches 9, the arch-shaped reinforcing steel structures, and the left and right bottom-connected reinforcing steel groups are installed respectively. Before installing a plurality of steel arch frames 9, the arch-shaped steel bar structures and the left and right bottom-connected steel bar groups, in order to further ensure good connection between the new and old concrete structures (namely the tunnel secondary lining 1 and the concrete sleeve lining 8), the inner surface of the tunnel secondary lining 1 needs to be roughened, and after roughening, the roughened area is cleaned by a steel wire brush and then cleaned by high-pressure water.
When a plurality of steel arches 9 are installed, the installation method of the plurality of steel arches 9 is the same. Before any one of the section steel arches 9 is installed, drilling anchor holes of the fasteners 10-2 by a drilling machine according to the arrangement positions of the fasteners 10-2 for fixing the section steel arch 9; after anchor holes of all the fasteners 10-2 for fixing the profile steel arch 9 are drilled, the profile steel arch 9 is erected, and the erected profile steel arch 9 is fixed through a plurality of arch fixing pieces, so that the installation process of one steel arch 9 is completed, and the steel arch 9 is simple and convenient to actually install and is firmly fixed. After one steel arch 9 is installed, the steel arch 9 is connected with the adjacent steel arch 9 through a plurality of longitudinal connecting steel bars 11. Each fastener 10-2 in the arch fixing piece is fixed through an anchoring adhesive. To provide an anchoring effect, the anchoring length of the fastener 10-2 is greater than 15 cm.
And in the process of installing a plurality of profile steel arches 9, the arched steel bar structures and the two bottom stubbled steel bar groups are synchronously and respectively installed.
When the arch-shaped steel bar structure is installed, the plurality of annular steel bar groups are installed from front to back along the longitudinal extension direction of the tunnel respectively, and the installation methods of the plurality of annular steel bar groups are the same. When any one of the annular steel bar groups is installed, firstly, a plurality of anchoring stirrups 3-4 in the annular steel bar group are respectively anchored; after the anchoring of the plurality of anchoring stirrups 3-4 is finished, installing the outside circumferential steel bars 3-2, supporting the outside circumferential steel bars 3-2 on the inner side wall of the tunnel secondary lining 1, and connecting the outer ends of the inner connecting sections of the anchoring stirrups 3-4 with the outside circumferential steel bars 3-2 in a binding mode or a welding mode to finish the installation process of the outside circumferential steel bars 3-2; after the installation of the outer circumferential steel bar 3-2 is finished, the inner circumferential steel bar 3-3 is installed; when the inner circumferential steel bars 3-3 are installed, the hooks 3-41 of the anchoring stirrups 3-4 are hooked on the inner circumferential steel bars 3-3 and fixed by spot welding.
And after all the inner circumferential steel bars 3-3 and a plurality of profile steel arches 9 in the arch-shaped steel bar structure are installed, respectively installing a plurality of longitudinal steel bars 3-1, and completing the installation process of the arch-shaped steel bar structure. The installation method of the plurality of longitudinal steel bars 3-1 is the same, when any one longitudinal steel bar 3-1 is installed, the longitudinal steel bar 3-1 is respectively connected with each inner circumferential steel bar 3-3 in the arch-shaped steel bar structure, and the longitudinal steel bar 3-1 and the inner wing plates 9-2 of the plurality of profile steel arch frames 9 are welded and fixed.
And in the process of installing the arched steel bar structure, anchoring the stubbled steel bars 3-5 in the two bottom stubbled steel bar groups respectively.
And after a plurality of profile steel arches 9, the arch-shaped steel bar structures and the left and right bottom stubbled steel bar groups are installed, pouring concrete into the concrete bushing 8.
The above, only be the utility model discloses a preferred embodiment, it is not right the utility model discloses do any restriction, all according to the utility model discloses the technical entity all still belongs to any simple modification, change and the equivalent structure change of doing above embodiment the utility model discloses technical scheme's within the scope of protection.

Claims (10)

1. The utility model provides a two lining renovation in tunnel are with cover lining which characterized in that: the tunnel comprises a concrete lining (8) which is arranged in a tunnel section (2) to be renovated and is formed by pouring concrete, a plurality of profile steel arch frames (9) which are arranged in the concrete lining (8) from front to back along the longitudinal extension direction of the tunnel, and an arch-shaped steel bar structure which is arranged in the concrete lining (8); the concrete sleeve linings (8) are arranged on the inner sides of tunnel secondary linings (1) of the tunnel sections (2) to be renovated, the tunnel secondary linings (1) are full-section supporting structures for performing full-section supporting on the tunnel sections (2) to be renovated, and the tunnel secondary linings (1) are reinforced concrete linings; the tunnel secondary lining (1) comprises an arch wall secondary lining for supporting an arch wall of the tunnel section (2) to be renovated and a tunnel inverted arch arranged at the bottom of the tunnel section (2) to be renovated, wherein the tunnel inverted arch is positioned right below the arch wall secondary lining and is connected with the arch wall secondary lining into a whole; a tunnel primary supporting structure (5) for carrying out primary supporting on the tunnel section (2) to be renovated is arranged on the outer side of the tunnel secondary lining (1), and the tunnel primary supporting structure (5) and the tunnel secondary lining (1) form a tunnel supporting structure of the tunnel section (2) to be renovated; the concrete sleeve lining (8) and the secondary lining of the arch wall arranged on the outer side of the concrete sleeve lining are cast into a whole, and the shape of the cross section of the concrete sleeve lining (8) is the same as that of the cross section of the secondary lining of the arch wall; a plurality of profile steel arch frames (9) are all poured in the concrete sleeve liner (8);
a plurality of profiled steel arches (9) are uniformly distributed, and each profiled steel arch (9) is uniformly distributed on the cross section of one tunnel of the tunnel section (2) to be rectified; a plurality of steel arches (9) are all supported on the inner wall of the secondary lining (1) of the tunnel, and the structures and the sizes of the plurality of steel arches (9) are all the same; the profile steel arch (9) is an arch support supported in the secondary lining of the arch wall, and the shape of the cross section of the profile steel arch (9) is the same as that of the cross section of the secondary lining of the arch wall;
each steel arch frame (9) is formed by bending a I-steel, the web plates of the I-steel are vertically arranged, one wing plate of the I-steel is an outer wing plate (9-1) supported on the inner wall of the secondary lining of the arch wall, and the other wing plate of the I-steel is an inner wing plate (9-2) positioned on the inner side of the outer wing plate (9-1); each steel arch (9) is fixedly arranged on the inner wall of the secondary lining of the arch wall through an arch fixing structure; each arch center fixing structure comprises a plurality of arch center fixing pieces, the structure and the size of each arch center fixing piece are the same, the plurality of arch center fixing pieces are uniformly distributed on the same tunnel cross section of a tunnel section (2) to be rectified, the plurality of arch center fixing pieces are distributed along the outer contour line of a profile steel arch (9), and the plurality of arch center fixing pieces form a wing plate fixing structure for fixing an outer side wing plate (9-1);
each arch center fixing piece comprises a front buckling piece and a rear buckling piece (10) which are symmetrically arranged, and the two buckling pieces (10) are buckled on the front side and the rear side of the outer side wing plate (9-1) respectively; each buckling piece (10) comprises a buckle (10-1) buckled on an outer wing plate (9-1) and a fastener (10-2) for fixing the buckle (10-1) on the tunnel supporting structure, the buckle (10-1) is formed by bending a flat steel plate and is divided into a buckling plate buckled on the outer wing plate (9-1) and a fixing plate arranged on the inner wall of the secondary lining of the arch wall, the fixing plate is positioned on the outer side of the buckling plate, and the fastener (10-2) is arranged on the fixing plate; each fastener (10-2) is vertically arranged with the inner wall of the arch wall secondary lining at the position of the fastener, and each fastener (10-2) extends out to the outer side of the tunnel supporting structure from inside to outside; the fastening piece (10-2) is a chemical anchor bolt, and a mounting hole for mounting the chemical anchor bolt is formed in the fixing plate;
the arched steel bar structure comprises a plurality of annular steel bar groups which are arranged in the tunnel section (2) to be renovated from front to back along the longitudinal extension direction of the tunnel and a plurality of longitudinal steel bars (3-1) which are all horizontally arranged, wherein the lengths of the longitudinal steel bars (3-1) are the same, and the front ends of the longitudinal steel bars are uniformly distributed on the same tunnel cross section of the tunnel section (2) to be renovated; the structure and the size of the plurality of annular steel bar groups are the same, each annular steel bar group is uniformly distributed on the cross section of one tunnel of the tunnel section (2) to be renovated, the plurality of annular steel bar groups are fixedly connected into a whole through a plurality of longitudinal steel bars (3-1), and each longitudinal steel bar (3-1) is positioned at the inner side of the plurality of annular steel bar groups;
each structural steel arch (9) is uniformly distributed between two adjacent circumferential steel bar groups in the front and the back, and a plurality of circumferential steel bar groups are uniformly distributed between two adjacent structural steel arches (9) in the front and the back; each structural steel arch (9) is positioned outside the longitudinal steel bars (3-1), and an inner side wing plate (9-2) of each structural steel arch (9) is welded and fixed with the longitudinal steel bars (3-1) into a whole;
each circumferential steel bar group comprises a plurality of anchoring stirrups (3-4), an outer circumferential steel bar (3-2) arranged on the inner wall of the tunnel secondary lining (1) and an inner circumferential steel bar (3-3) arranged on the inner side of the outer circumferential steel bar (3-2); the outer circumferential steel bars (3-2) and the inner circumferential steel bars (3-3) in each circumferential steel bar group are arranged on the same cross section of the tunnel section (2) to be renovated, the outer circumferential steel bars and the inner circumferential steel bars are both arch-shaped steel bars arranged on the inner side of the secondary lining of the arch wall, and the shapes of the outer circumferential steel bars (3-2) and the inner circumferential steel bars (3-3) are the same as the shape of the cross section of the secondary lining of the arch wall; a plurality of anchoring stirrups (3-4) in each circumferential reinforcing steel bar group are uniformly distributed on the same cross section of the tunnel section (2) to be rectified, the plurality of anchoring stirrups (3-4) are distributed along the inner contour line of the secondary lining of the arch wall, and each anchoring stirrup (3-4) is vertically distributed with the inner wall of the secondary lining of the arch wall at the distributed position; a plurality of anchoring stirrups (3-4) in each circumferential steel bar group are fixedly connected into a whole through outer circumferential steel bars (3-2) and inner circumferential steel bars (3-3);
each anchoring stirrup (3-4) is divided into an outer anchoring section anchored in the arch wall secondary lining and an inner connecting section positioned on the inner side of the outer anchoring section, and the outer end of the outer anchoring section is provided with an anchoring head (3-42) formed by bending; the inner end of the internal connecting section is provided with a hook (3-41) formed after bending, the hook (3-41) is hung on the inner side annular steel bar (3-3) and fixedly connected with the inner side annular steel bar through spot welding; the outer end of the inner connecting section is connected with an outer circumferential steel bar (3-2);
the plurality of longitudinal steel bars (3-1) are distributed along the inner contour line of the secondary lining of the arch wall, and each longitudinal steel bar (3-1) is connected with the plurality of outer circumferential steel bars (3-2) in the arch steel bar structure;
the internal connecting section, the longitudinal steel bar (3-1), the outer circumferential steel bar (3-2) and the inner circumferential steel bar (3-3) in the arch-shaped steel bar structure are all poured in the concrete lining (8).
2. The lining for tunnel secondary lining renovation construction according to claim 1, wherein: the number of the fastening pieces (10-2) in each fastener (10) is one, and the fastening pieces (10-2) are fixed in the middle of the fixing plate.
3. The lining for tunnel secondary lining renovation construction according to claim 1 or 2, characterized in that: supporting grooves (6) for supporting arch feet of a steel arch frame (9) are formed in the bottoms of the left side and the right side of the secondary lining of the arch wall, and the supporting grooves (6) are mounting grooves formed after concrete at the bottom of the secondary lining of the arch wall is chiseled; the bottom surface of the supporting groove (6) is a horizontal plane, and the bottom surface of the supporting groove (6) is positioned below the upper surface of a ditch cable groove (7) in the tunnel section (2) to be renovated;
the left arch foot and the right arch foot of the arch-shaped steel bar structure are supported on the bottom surface of one supporting groove (6).
4. The lining for tunnel secondary lining renovation construction according to claim 3, wherein: the steel bar support also comprises a left bottom joint reinforcing bar group and a right bottom joint reinforcing bar group, wherein each bottom joint reinforcing bar group is uniformly distributed at the bottom of one support groove (6);
each bottom stubble connecting reinforcing steel bar group comprises a plurality of groups of stubble connecting reinforcing steel bars (3-5) which are arranged from front to back along the longitudinal extension direction of the tunnel, each group of stubble connecting reinforcing steel bars (3-5) comprises a left stubble connecting reinforcing steel bar (3-5) and a right stubble connecting reinforcing steel bar (3-5) which are arranged on the cross section of the same tunnel, and the two stubble connecting reinforcing steel bars (3-5) are arranged in the vertical direction; each stubble connecting reinforcing steel bar (3-5) is divided into a lower anchoring section and an upper exposed section above the lower anchoring section by taking the bottom surface of the supporting groove (6) as a boundary, and the lower anchoring section is anchored in the secondary tunnel lining (1); the lower parts of two upper exposed sections in each group of the stubble connecting reinforcing steel bars (3-5) are connected through a horizontal connecting rib (3-6); all the stubble reinforcing steel bars (3-5) in each bottom stubble reinforcing steel bar group are distributed in left and right two rows, and each row of stubble reinforcing steel bars (3-5) comprises a plurality of stubble reinforcing steel bars (3-5) which are distributed from front to back along the longitudinal extension direction of the tunnel;
the upper exposed section and the horizontal connecting ribs (3-6) in the bottom joint reinforcing steel bar group are both poured in a concrete sleeve lining (8).
5. The lining for tunnel secondary lining renovation construction according to claim 1 or 2, characterized in that: the excavation section of the tunnel section (2) to be renovated is more than 100m2
The longitudinal steel bars (3-1) are uniformly distributed, and the circumferential distance between every two adjacent longitudinal steel bars (3-1) is 1.8-2.2 m.
6. The lining for tunnel secondary lining renovation construction according to claim 1 or 2, characterized in that: the thickness of the secondary lining of the arch wall is 40 cm-50 cm, and the length of the outer anchoring section is 18 cm-22 cm.
7. The lining for tunnel secondary lining renovation construction according to claim 4, wherein: the lengths of the lower anchoring section and the upper exposed section are both 25 cm-35 cm.
8. The lining for tunnel secondary lining renovation construction according to claim 1 or 2, characterized in that: the distance between two front and back adjacent shaped steel arches (9) is 0.8-1.2 m.
9. The lining for tunnel secondary lining renovation construction according to claim 1 or 2, characterized in that: the straight steel plate is a rectangular steel plate;
the length of the buckle plate in the front-back direction is 13-15 cm, and the width of the buckle plate is 10-15 cm.
10. The lining for tunnel secondary lining renovation construction according to claim 1 or 2, characterized in that: the outer side wing plates (9-1) of two front and rear adjacent section steel arch frames (9) are connected through a plurality of longitudinal connecting steel bars (11), the longitudinal connecting steel bars (11) are horizontally arranged and are uniformly distributed on the same tunnel cross section of the tunnel section (2) to be rectified, and the longitudinal connecting steel bars (11) are arranged along the outer contour line of the section steel arch frames (9); the front end and the rear end of each longitudinal connecting steel bar (11) are welded and fixed on the inner wall of one outer side wing plate (9-1).
CN201922142836.6U 2019-12-03 2019-12-03 Sleeve lining for tunnel secondary lining renovation construction Active CN211201989U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201922142836.6U CN211201989U (en) 2019-12-03 2019-12-03 Sleeve lining for tunnel secondary lining renovation construction

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201922142836.6U CN211201989U (en) 2019-12-03 2019-12-03 Sleeve lining for tunnel secondary lining renovation construction

Publications (1)

Publication Number Publication Date
CN211201989U true CN211201989U (en) 2020-08-07

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201922142836.6U Active CN211201989U (en) 2019-12-03 2019-12-03 Sleeve lining for tunnel secondary lining renovation construction

Country Status (1)

Country Link
CN (1) CN211201989U (en)

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