CN112922644A - Guide hole arch frame vertical frame device in tunnel primary support and construction method thereof - Google Patents

Guide hole arch frame vertical frame device in tunnel primary support and construction method thereof Download PDF

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Publication number
CN112922644A
CN112922644A CN202110385249.9A CN202110385249A CN112922644A CN 112922644 A CN112922644 A CN 112922644A CN 202110385249 A CN202110385249 A CN 202110385249A CN 112922644 A CN112922644 A CN 112922644A
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China
Prior art keywords
plate
vertical plate
arch
tunnel
vertical
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CN202110385249.9A
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Chinese (zh)
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吴开才
刘浪
赵明海
吴永松
刘虎闱
刘万嘉
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China Railway No 5 Engineering Group Co Ltd
Road and Bridge Engineering Co Ltd of China Railway No 5 Engineering Group Co Ltd
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China Railway No 5 Engineering Group Co Ltd
Road and Bridge Engineering Co Ltd of China Railway No 5 Engineering Group Co Ltd
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Priority to CN202110385249.9A priority Critical patent/CN112922644A/en
Publication of CN112922644A publication Critical patent/CN112922644A/en
Pending legal-status Critical Current

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    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D11/00Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
    • E21D11/40Devices or apparatus specially adapted for handling or placing units of linings or supporting units for tunnels or galleries
    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D20/00Setting anchoring-bolts

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Lining And Supports For Tunnels (AREA)

Abstract

The invention discloses a pilot tunnel arch centering vertical frame device in tunnel preliminary bracing and a construction method thereof, wherein the arch centering vertical frame device comprises an arch groove, a support system and a connector, the arch groove comprises a vertical plate and a rib plate, the vertical plate comprises a first vertical plate and a second vertical plate, the first vertical plate and the second vertical plate are arranged in parallel at a preset distance, the rib plate is positioned between the first vertical plate and the second vertical plate, and two ends of the rib plate are respectively and fixedly connected with the lower parts of the first vertical plate and the second vertical plate; the supporting system comprises a lifting mechanism, a rotating mechanism and a mounting seat, the lifting mechanism is vertically arranged on the supporting surface, the mounting seat is fixedly connected with the top end of the lifting mechanism through screws, and the rotating mechanism is fixed on the mounting seat; the connector is located the first riser outside and is connected with bow member groove fixed connection to adopt the screw to pass through the connecting rod and connect rotary mechanism. The invention solves the problems that the operation space of the vault position of the middle pilot tunnel is small, the vertical frame and the operation cannot be adopted, and the manual vertical frame has high labor intensity, low efficiency and high danger coefficient.

Description

Guide hole arch frame vertical frame device in tunnel primary support and construction method thereof
Technical Field
The invention belongs to the technical field of tunnel engineering, and particularly relates to a pilot tunnel arch frame vertical frame device in tunnel primary support and a construction method thereof.
Background
The double-side-wall pit guiding method is a construction technology for excavating and supporting at the same time, and the principle is as follows: dividing the whole large section of the tunnel into a left small section, a middle small section and a right small section by using two middle partition walls for construction, wherein the left pilot tunnel and the right pilot tunnel move first, and the middle section follows the left pilot tunnel and the right pilot tunnel; after the primary support inverted arch is looped, the temporary supports of the pilot tunnels on the two sides are removed to form a full section. The guide holes on the two sides are in inverted goose egg shapes, so that the vault is controlled to sink.
The double-side-wall pit guiding method is suitable for driving tunnel excavation under the condition of poor surrounding rock V-level surrounding rock, and can control ground surface subsidence and keep tunnel face stability by adopting the double-side-wall pit guiding method during shallow-buried large-span tunnel construction. On the premise of higher requirements on traffic, the tunnel is widely applied to three-lane and four-lane tunnels of expressways and municipal roads.
The double-side-wall pilot tunnel method is safe in construction, but is low in speed and high in cost, the partition area of each pilot tunnel is small, especially the construction of a middle pilot tunnel is difficult, large-scale mechanical construction of a step method and full-face excavation is difficult to achieve, the main part is an artificial vertical frame, the mechanical cooperation is auxiliary, great risks exist in both construction quality and construction safety, the artificial construction cycle time of the middle pilot tunnel is long, the integral tunneling speed of a tunnel is severely limited, and the bottleneck of construction control progress of the double-side-wall pilot tunnel method is formed.
In the road engineering, the tunnel is in a bidirectional 8-lane separated tunnel, the inner contour of the lining of the left line and the right line of the tunnel is 11.45m high and 18.79m wide, the total length of the left line of the tunnel is 1983m, the total length of the right line is 1769m, the geological structure of the tunnel is a cattle horn slope anticline, the grades of surrounding rocks are 4 and 5, wherein the length of the 5-grade surrounding rocks is 936m, which accounts for 49.9 percent of the total length of the tunnel, and the tunnel is excavated by adopting a tunnel entrance section Z5q and Z5-grade surrounding rock double-side-wall pit guiding method. Although the whole excavation width of the tunnel is large, the clear width of excavation of the middle pilot tunnel is only 4.12m, the Z5 q-level support belongs to a shallow-buried reinforcing section, surrounding rocks are generally poor, the middle pilot tunnel is excavated by a reserved core soil method, the operating space of the vault position is small and is only about 1m, a vertical frame machine cannot be used for vertical frame operation, the operation can only be carried out by adopting a manual vertical frame mode, the operation labor intensity is high, the labor time is long, and the efficacy is low.
Disclosure of Invention
The invention aims to provide a pilot tunnel arch frame erecting device in tunnel primary support and a construction method thereof, which are used for forming support for a pilot tunnel by applying a pilot tunnel arch frame in mechanical installation and are used for solving the problems of high working strength, long cycle time and the like of pilot tunnel construction in a double-side-wall pilot tunnel method.
The technical scheme adopted by the invention is that the pilot tunnel arch frame vertical frame device in the primary tunnel support comprises:
the arch frame groove comprises a vertical plate and a rib plate, the vertical plate comprises a first vertical plate and a second vertical plate, the first vertical plate and the second vertical plate are arranged in parallel at a preset interval, the rib plate comprises a first rib plate and a second rib plate, the first rib plate and the second rib plate are positioned between the first vertical plate and the second vertical plate and are respectively and symmetrically arranged at the front end and the lower part of the rear end of the first vertical plate and the second vertical plate, the first rib plate and the second rib plate are vertically arranged, and the end surfaces at two sides of the first rib plate and the second rib plate are respectively and fixedly connected with the first vertical plate and the second vertical plate;
the supporting system comprises a lifting mechanism, a rotating mechanism and a mounting seat, wherein the lifting mechanism is vertically arranged on a supporting surface, the mounting seat is fixedly connected with the top end of the lifting mechanism through a screw, and the rotating mechanism is fixed on the mounting seat;
the connector is located on the outer side of the first vertical plate and fixedly connected with the first vertical plate, and a screw is used for connecting the rotating mechanism through a connecting rod.
Further, elevating system includes the base, base top fixed connection pneumatic cylinder, and the hydraulic pump is connected to the pneumatic cylinder, and the hydraulic pump below sets up oil tank and the oil tank is fixed on the base.
Furthermore, rotary mechanism comprises motor and motor output shaft connecting seat, and the output shaft of motor pegs graft inside motor output shaft connecting seat, and motor output shaft connecting seat bottom fixed connection flange, flange and mount pad fixed connection.
Furthermore, the ribbed plates comprise a first ribbed plate and a second ribbed plate, the first ribbed plate and the second ribbed plate are respectively and symmetrically arranged at the front end and the rear end of the first vertical plate and the rear end of the second vertical plate, and the first ribbed plate and the second ribbed plate are vertically arranged.
Furthermore, the rib plate is of a transverse H-shaped structure, the end face of the right side of the rib plate is welded with the first vertical plate, and the end face of the left side of the rib plate is welded with the second vertical plate.
Further, the distance between the first vertical plate and the second vertical plate is matched with the width of the arch frame.
Furthermore, a plurality of positioning holes are transversely formed in the upper portions of the first vertical plate and the second vertical plate, and positioning pins are arranged in the positioning holes in a matched mode.
Further, the connector includes bottom plate and curb plate, bottom plate top and first riser bottom fixed connection, the curb plate is equipped with two, perpendicular bottom plate relatively fixed respectively on the bottom plate, corresponds on two blocks of curb plates and offers the mounting hole, and the mounting hole matches and is equipped with the fixed pin.
Further, the junction between connector bottom plate and the curb plate is equipped with the reinforcing plate, the reinforcing plate includes the upper portion reinforcing plate, sets up in the junction of bottom plate and first riser, and the middle part reinforcing plate sets up in the middle part of bottom plate and curb plate, and the lower part reinforcing plate sets up in the lower part of bottom plate and curb plate.
Further, the mounting holes are respectively arranged between the upper reinforcing plate and the middle reinforcing plate, and between the middle reinforcing plate and the lower reinforcing plate;
a construction method of a pilot tunnel arch frame vertical frame device in tunnel primary support comprises the following steps:
s1, construction preparation: after blasting excavation of the middle pilot tunnel is finished, cleaning dangerous rocks on the tunnel face, and applying primary spraying concrete in time;
s2, connecting the arch center outside the tunnel: the arch frame is assembled and connected outside the middle pilot tunnel, so that the connection speed is accelerated;
s3, arch center lifting: after the arch frames are connected, the excavator lifts the arch frames to enable the arch frames to be upright, the arch frames are directly supported and lifted by utilizing the arch frame grooves, positioning pins penetrate through positioning holes and connecting holes of the arch frames to fix the arch frames, and the arch frames are lifted to the face of a middle pilot tunnel through a lifting mechanism;
s4, arch center installation: finely adjusting the position of the arch frame through a rotating mechanism, manually connecting a bolt after the completion, and rotating and reinforcing by using a wrench;
s5, anchor rod construction: after the arch frame is installed and connected, the excavator is timely pushed out, and anchor rod operation of the system is started.
Compared with the prior art, the invention has the beneficial effects that:
1) the arch frame erecting device provided by the invention has the advantages that the structure is simple, the arrangement is easy, the requirement on the use environment is not high, the arch frame is quickly connected at the lower step when the arch frame erecting device is used, the arch frame is directly lifted to the arch crown through the lifting mechanism, and the arch frame of the middle pilot tunnel is quickly installed after the arch frame is finely adjusted and rotated through the rotating mechanism, so that the problems that the operation space at the arch crown position of the middle pilot tunnel is small at present, the erecting machine cannot be used for erecting work, the labor intensity of manual erecting work is high, and the efficiency is low are solved;
2) the supporting system is composed of the lifting mechanism and the rotating mechanism, the lifting mechanism adopts the electric drive hydraulic pump to control the hydraulic cylinder to complete lifting movement, the in-hole machinery is not depended on, and the rotating mechanism realizes fine adjustment through the rotation of the motor and then accurately installs the arch centering;
3) the rib plates are respectively fixed at the front ends and the rear ends of the first vertical plate and the second vertical plate by adopting a first rib plate and a second rib plate so as to achieve the purpose of stably and firmly connecting the first vertical plate and the second vertical plate, and the first rib plate and the second rib plate are symmetrically and vertically arranged so as to be beneficial to forming support for the arc-shaped arch center;
4) the rib plate is in a transverse I-shaped structure, so that the connecting area of the left end face and the right end face of the rib plate, the second vertical plate and the first vertical plate is increased, and the connecting firmness is enhanced;
5) the distance between the first vertical plate and the second vertical plate is matched with the width of the arch centering, so that the arch centering is just placed in the arch centering groove, and the arch centering is lifted;
6) positioning holes are transversely formed in the upper parts of the first vertical plate and the second vertical plate, correspond to the connecting holes of the arch centering, and penetrate through the positioning holes and the connecting holes in the vertical plate and the arch centering by utilizing the positioning pins so as to prevent the arch centering from sliding in the lifting process;
7) the junction between connector bottom plate and the curb plate is equipped with the reinforcing plate, strengthens the firm in connection nature of bottom plate and curb plate, and increase connector intensity ensures that the connector bears the operating strength of digging the arm to the connector.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the arch camber groove structure of the present invention;
FIG. 3 is a schematic view of a rib structure according to the present invention;
FIG. 4 is a schematic view of a rotary structure of the present invention;
fig. 5 is a schematic view of the structure of the connecting head of the present invention.
The figure is marked with: 1. the device comprises an arch frame groove 11, vertical plates 111, first vertical plates 112, second vertical plates 113, positioning holes 114, positioning pins 12, ribbed plates 121, first ribbed plates 122 and second ribbed plates;
2. the device comprises a supporting system, 21, a lifting mechanism, 211, a base, 212, traveling wheels, 213, hydraulic cylinders, 214, hydraulic pumps, 215 and an oil tank; 22. the rotating mechanism 221, the motor 222, the motor output shaft connecting seat 223 and the flange;
3. the connecting head 31, the bottom plate 32, the side plate 321, the mounting hole 322, the fixing pin 33, the reinforcing plate 331, the upper reinforcing plate 332, the middle reinforcing plate 333 and the lower reinforcing plate;
4. a connecting rod.
Detailed Description
The invention will be further explained in the following with reference to the drawings attached to the specification in order to facilitate better understanding by those skilled in the art.
Referring to fig. 1-5, a pilot tunnel arch centering device for preliminary tunnel support includes an arch groove 1, a support system 2, a connector 3 and a connecting rod 4.
The arch truss groove 1 comprises a vertical plate 11 and a rib plate 12, the vertical plate 11 comprises a first vertical plate 111 and a second vertical plate 112 which are two steel plates with the same structure and size, the thickness of the vertical plate 11 is not less than 5cm, the vertical plate has enough strength, and the first vertical plate 11 and the second vertical plate 12 are arranged in parallel at a preset interval; the ribbed plate 12 is located between the first vertical plate 111 and the second vertical plate 112, and two ends of the ribbed plate 12 are respectively and fixedly connected with the lower parts of the first vertical plate 111 and the second vertical plate 112. In this embodiment, the rib 12 includes a first rib 121 and a second rib 122, the first rib 121 and the second rib 122 are respectively symmetrically disposed at the front end and the rear end of the first upright plate 111 and the second upright plate 112 to stably and firmly connect the first upright plate 111 and the second upright plate 112, so as to keep the structural balance, and the first rib 121 and the second rib 122 are vertically disposed, which is beneficial to forming a support for an arc arch center.
Further, the rib plate 12 is in a transverse i-shaped structure, the end face of the right side of the rib plate 12 is welded to the first vertical plate 111, the end face of the left side of the rib plate 12 is welded to the second vertical plate 112, the rib plate 12 in the i-shaped structure increases the contact area between the rib plate 12 and the first vertical plate 111 as well as the contact area between the rib plate 12 and the second vertical plate 112, the connection firmness is enhanced, and the welding is facilitated.
The first vertical plate 111, the second vertical plate 112 and the rib plate 12 form an arch center groove 1 with a preset depth, the distance between the first vertical plate 111 and the second vertical plate 112 is matched with the width of an arch center, the arch center is transversely arranged in the arch center groove 1, and the arch center is clamped and lifted through the arch center groove 1.
In order to prevent the sliding of the arch centering during the lifting process, a plurality of positioning holes 113 are transversely formed in the upper portions of the first vertical plate 111 and the second vertical plate 112, the positioning holes 113 correspond to the connecting holes of the arch centering, positioning pins 114 are arranged in the positioning holes 113 in a matching manner, the positioning pins 114 penetrate through the positioning holes 113 and the connecting holes, and the arch centering is fixed on the vertical plate 11.
Support system 2 includes elevating system 21, rotary mechanism 22 and mount pad 23, elevating system 21 includes base 211, and the holding surface is located immediately to base 211, and base 211 bottom is equipped with walking wheel 212, base 211 top fixed connection pneumatic cylinder 213, and hydraulic cylinder 213 connects hydraulic pump 214, and hydraulic pump 214 below sets up oil tank 214 and oil tank 215 and fixes on base 211, and elevating system 21 passes through electric drive hydraulic pump 214 for pneumatic cylinder 213 rises, accomplishes through arch groove 1 and lifts to the arch. The mounting seat 23 is fixedly connected with the top end of the lifting mechanism 21 through screws, the rotating mechanism 22 is fixed on the mounting seat 23, the rotating mechanism 22 is composed of a motor 221 and a motor output shaft connecting seat 222, an output shaft of the motor 221 is inserted into the motor output shaft connecting seat 222, a flange 223 is fixedly connected to the bottom of the motor output shaft connecting seat 222, and the flange 223 is fixedly connected with the mounting seat 23.
The connector 3 is located on the outer side of the first vertical plate 111 and fixedly connected with the first vertical plate 111, and is connected with the rotating mechanism 22 through a connecting rod 4 by screws. Connector 3 includes bottom plate 31 and curb plate 32, bottom plate 31 top and the 111 bottom fixed connection of first riser, curb plate 32 are equipped with two, perpendicular bottom plate 31 relatively fixed deviates from one side of first riser 111 on bottom plate 31 respectively, and bottom plate 31 constitutes U type groove structure with two curb plates 32, and the junction between bottom plate 31 of connector 3 and the curb plate 32 is equipped with reinforcing plate 33, specifically, reinforcing plate 33 includes upper portion reinforcing plate 331, sets up the junction at bottom plate 31 and first riser 111, middle part reinforcing plate 332, sets up the middle part at bottom plate 31 and curb plate 32, lower part reinforcing plate 333, sets up the lower part at bottom plate 31 and curb plate 32, with the connection steadiness of increase bottom plate 31 and first riser 111, bottom plate 31 and curb plate 32, increase connector 3 intensity. In addition, the two side plates 32 are correspondingly provided with mounting holes 321, the mounting holes 321 are respectively arranged between the upper reinforcing plate 331 and the middle reinforcing plate 332, between the middle reinforcing plate 332 and between the lower reinforcing plate 333, the mounting holes 321 are matched with fixing pins 322, and the connecting rod 4 is fixedly connected through the fixing pins 322 after being inserted into the connecting head 3.
A construction method of a pilot tunnel arch frame vertical frame device in tunnel primary support comprises the following steps:
s1, construction preparation: after blasting excavation of the middle pilot tunnel is finished, timely transporting tunnel face muck, leveling a road after the blasting excavation is finished, cleaning the tunnel face dangerous rock, timely applying primary spray concrete, specifically, the thickness of 5-grade surrounding rock spray concrete is 28cm, firstly spraying 4cm of spray concrete after the excavation is finished, after erecting a steel frame, performing layered re-spraying to the designed thickness, and ensuring that the once re-spraying thickness of the vault is not more than 10 cm;
s2, connecting the arch center outside the tunnel: because the arch center of the middle pilot tunnel is divided into two sections, the total length is 7.9m, and the time consumption for connecting the tunnel face in the tunnel is long, the arch center is transferred to the outside of the middle pilot tunnel to be connected, so that the connecting speed is accelerated;
s3, arch center lifting: after the arches are connected, the excavator lifts the arches to enable the arches to be upright, the arches are directly supported and lifted by utilizing the arch groove 1, the arch is fixed by penetrating a positioning pin 113 through a positioning hole 114 and a connecting hole of the arch, and then the arch is lifted to the tunnel face of the middle pilot tunnel;
s4, arch center installation: starting a lifting mechanism 21 to lift the connected arch centering to a tunnel face, finely adjusting the position of the arch centering by controlling a rotating mechanism 22, keeping the installation distance of the arch centering not more than 5cm, the allowable deviation of the inclination of the arch centering to be +/-2 degrees, the assembling deviation to be +/-3 mm, the horizontal deviation to be +/-50 mm and the vertical deviation to be not less than the designed value, manually connecting bolts after finishing, and rotationally reinforcing by using a wrench;
s5, anchor rod construction: after the arch frame is installed and connected, the excavator is timely pushed out, and anchor rod operation work of the system is started when the anchor rod construction team enters the field.
The invention can be used when the operating space at the vault position is small, only about 1m, and the vertical frame machine cannot be used for vertical frame operation, and solves the problems of high labor intensity, low efficiency and high risk of the manual vertical frame in the prior art. The device is small and exquisite, quick installation or disassembly of the device is realized, flexibility and convenience are realized, and the cycle time is not occupied; through connect the bow member fast at the lower step, directly lift to the vault, can finely tune the rotation, the quick installation of guide hole bow member in realizing for when cycle time, reduced workman's operation intensity and operation personnel quantity, simultaneously because mechanical operation only needs artifical simple cooperation, reduced the injured risk of workman in the middle of artifical grudging post.
The embodiments described above are only a part of the embodiments of the present invention, and not all of them. 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.

Claims (10)

1. The utility model provides a pilot tunnel bow member grudging post device in tunnel preliminary bracing which characterized in that includes:
the arch truss groove (1) comprises a vertical plate (11) and a rib plate (12), wherein the vertical plate (11) comprises a first vertical plate (111) and a second vertical plate (112), the first vertical plate (111) and the second vertical plate (112) are arranged in parallel at a preset interval, the rib plate (12) comprises a first rib plate (121) and a second rib plate (122), the first rib plate (121) and the second rib plate (122) are positioned between the first vertical plate (111) and the second vertical plate (112) and are symmetrically arranged at the front end and the lower part of the rear end of the first vertical plate (111) and the second vertical plate (112) respectively, the first rib plate (121) and the second rib plate (122) are vertically arranged, and the end surfaces of two sides of the first rib plate (121) and the second rib plate (122) are fixedly connected with the first vertical plate (111) and the second vertical plate (112) respectively;
the supporting system (2) comprises a lifting mechanism (21), a rotating mechanism (22) and a mounting seat (23), the lifting mechanism (21) is vertically arranged on a supporting surface, the mounting seat (23) is fixedly connected with the top end of the lifting mechanism (21) through a screw, and the rotating mechanism (22) is fixed on the mounting seat (23);
the connector (3) is located on the outer side of the first vertical plate (11) and fixedly connected with the first vertical plate (11), and is connected with the rotating mechanism (22) through a connecting rod (4) by screws.
2. The pilot tunnel arch erecting device in tunnel preliminary bracing according to claim 1, wherein: elevating system (21) include base (211), and the base bottom sets up walking wheel (212) base (211) top fixed connection pneumatic cylinder (213), and hydraulic pump (214) is connected in pneumatic cylinder (213), and hydraulic pump (214) below sets up oil tank (215) and fixes on base (215).
3. The pilot tunnel arch erecting device in tunnel preliminary bracing according to claim 1, wherein: the rotating mechanism (22) is composed of a motor (221) and a motor output shaft connecting seat (222), an output shaft of the motor (221) is inserted into the motor output shaft connecting seat (222), a flange (223) is fixedly connected to the bottom of the motor output shaft connecting seat (222), and the flange (223) is fixedly connected with the mounting seat (23).
4. The pilot tunnel arch erecting device in tunnel preliminary bracing according to claim 1, wherein: the rib plate (12) is of a transverse H-shaped structure, the end face of the right side of the rib plate (12) is welded with the first vertical plate (111), and the end face of the left side of the rib plate (12) is welded with the second vertical plate (112).
5. The pilot tunnel arch erecting device in tunnel preliminary bracing according to claim 1, wherein: the distance between the first vertical plate (111) and the second vertical plate (112) is matched with the width of the arch frame.
6. The pilot tunnel arch erecting device in tunnel preliminary bracing according to claim 1, wherein: a plurality of positioning holes (113) are transversely formed in the upper portions of the first vertical plate (111) and the second vertical plate (112), and positioning pins (114) are arranged in matching positioning holes (113).
7. The pilot tunnel arch erecting device in tunnel preliminary bracing according to claim 1, wherein: connector (3) are including bottom plate (31) and curb plate (32), bottom plate (31) top and first riser (111) bottom fixed connection, curb plate (32) are equipped with two, perpendicular bottom plate (31) relatively fixed respectively on bottom plate (31), correspond on two curb plate (32) and offer mounting hole (321), and mounting hole (321) match and are equipped with fixed pin (322).
8. The pilot tunnel arch erecting device in preliminary tunnel support according to claim 7, wherein: the joint between connector (3) bottom plate (31) and curb plate (32) is equipped with reinforcing plate (33), reinforcing plate (33) include upper portion reinforcing plate (331), set up in the junction of bottom plate (31) and first riser (111), middle part reinforcing plate (332), set up in the middle part of bottom plate (31) and curb plate (32), lower part reinforcing plate (333) sets up in the lower part of bottom plate (31) and curb plate (32).
9. The pilot tunnel arch erecting device in preliminary tunnel support according to claim 8, wherein: the mounting holes (321) are respectively arranged between the upper reinforcing plate (331) and the middle reinforcing plate (332), and between the middle reinforcing plate (332) and the lower reinforcing plate (333).
10. The construction method of the pilot tunnel arch centering device in the preliminary tunnel support according to any one of claims 1 to 9, comprising the steps of:
s1, construction preparation: after blasting excavation of the middle pilot tunnel is finished, cleaning dangerous rocks on the tunnel face, and applying primary spraying concrete in time;
s2, connecting the arch center outside the tunnel: the arch frame is assembled and connected outside the middle pilot tunnel, so that the connection speed is accelerated;
s3, arch center lifting: after the arches are connected, the excavator lifts the arches to enable the arches to be upright, the arches are directly supported and lifted by utilizing the arch groove (1), a positioning pin (114) penetrates through a positioning hole (113) and a connecting hole of the arches to fix the arches, and then the arches are lifted to the tunnel face of the middle pilot tunnel through a lifting mechanism (31);
s4, arch center installation: the position of the arch center is finely adjusted through a rotating mechanism (22), the bolt is manually connected after the completion, and the reinforcing is realized by rotating a spanner;
s5, anchor rod construction: after the arch frame is installed and connected, the excavator is timely pushed out, and anchor rod operation of the system is started.
CN202110385249.9A 2021-04-09 2021-04-09 Guide hole arch frame vertical frame device in tunnel primary support and construction method thereof Pending CN112922644A (en)

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Application Number Priority Date Filing Date Title
CN202110385249.9A CN112922644A (en) 2021-04-09 2021-04-09 Guide hole arch frame vertical frame device in tunnel primary support and construction method thereof

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Application Number Priority Date Filing Date Title
CN202110385249.9A CN112922644A (en) 2021-04-09 2021-04-09 Guide hole arch frame vertical frame device in tunnel primary support and construction method thereof

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Publication Number Publication Date
CN112922644A true CN112922644A (en) 2021-06-08

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101557340B1 (en) * 2015-04-15 2015-10-05 한성산업(주) Lift car for arch tunnel structure construction
CN106761854A (en) * 2017-01-09 2017-05-31 北京新能正源环境科技有限公司 The installation method of tunnel arch
CN107701207A (en) * 2017-11-28 2018-02-16 山东天勤工程科技有限公司 Subterranean tunnel assembled bow member support system and mechanized construction method
CN111236988A (en) * 2020-03-11 2020-06-05 长安大学 Tunnel arch top steel bow member auxiliary installation device
CN214741382U (en) * 2021-04-09 2021-11-16 中铁五局集团路桥工程有限责任公司 Tunnel preliminary bracing well pilot tunnel bow member grudging post device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101557340B1 (en) * 2015-04-15 2015-10-05 한성산업(주) Lift car for arch tunnel structure construction
CN106761854A (en) * 2017-01-09 2017-05-31 北京新能正源环境科技有限公司 The installation method of tunnel arch
CN107701207A (en) * 2017-11-28 2018-02-16 山东天勤工程科技有限公司 Subterranean tunnel assembled bow member support system and mechanized construction method
CN111236988A (en) * 2020-03-11 2020-06-05 长安大学 Tunnel arch top steel bow member auxiliary installation device
CN214741382U (en) * 2021-04-09 2021-11-16 中铁五局集团路桥工程有限责任公司 Tunnel preliminary bracing well pilot tunnel bow member grudging post device

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