CN113152247A - Steel trestle for assisting in entering cave of mountain tunnel and installation method - Google Patents
Steel trestle for assisting in entering cave of mountain tunnel and installation method Download PDFInfo
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- CN113152247A CN113152247A CN202110490899.XA CN202110490899A CN113152247A CN 113152247 A CN113152247 A CN 113152247A CN 202110490899 A CN202110490899 A CN 202110490899A CN 113152247 A CN113152247 A CN 113152247A
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D15/00—Movable or portable bridges; Floating bridges
- E01D15/12—Portable or sectional bridges
- E01D15/133—Portable or sectional bridges built-up from readily separable standardised sections or elements, e.g. Bailey bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/01—Flat foundations
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/74—Means for anchoring structural elements or bulkheads
Abstract
The invention provides a steel trestle for assisting in entering a tunnel in a mountain ridge and an installation method, and the steel trestle comprises a plurality of rows of first foundations, second foundations and fourth foundations which are arranged from top to bottom along the slope surface of a mountain ridge side slope, wherein an upright column is arranged on the fourth foundation, an I-shaped steel beam is supported on the upright column, one side of the I-shaped steel beam is connected with the second foundation, a plurality of Bailey pieces are detachably arranged on the I-shaped steel beam, a bridge deck is connected onto the Bailey pieces, and one side of the bridge deck is connected with the first foundation; and a parallel connection is further arranged and is used for fixedly connecting a plurality of stand columns. The method has high construction efficiency, solves the problems of troublesome disassembly and assembly of the steel trestle, lower terrain applicability and poor stability of unrecyclable raw materials when the tunnel portal of the mountain area is constructed, and can ensure the cross operation of the tunnel and assist the terrain stability of the tunnel portal in the steep slope and narrow terrain area due to the increase of the length of the construction operation surface.
Description
Technical Field
The invention relates to the technical field of tunnel auxiliary entry temporary facilities, in particular to a mountain tunnel auxiliary entry steel trestle and an installation method thereof.
Background
When the mountainous area tunnel construction is carried out, the mountainous area tunnel construction is limited by complex geographical conditions of mountainous areas, and all holes of the mountainous area tunnel are usually located in steep slopes and narrow terrain areas, so that the light and shade junctions of the tunnel holes are difficult to set up a long pipe shed construction operation space, and the problems that construction raw materials, equipment, tunnel waste slag and the like have no transportation channels are caused. The method is characterized in that a retaining wall is built to increase a construction working face, inclined shafts are adopted to enter a hole, a temporary facility for assisting in entering the hole of a traditional mountain tunnel such as a temporary in-out-of-hole transportation channel is built, and related problems of construction working face erection, in-out-of-hole transportation channel construction and the like can be solved effectively. Therefore, there is a need for improvement of the existing mountain tunnel assisted hole entering temporary facility technology.
Chinese patent document CN 106884373 a describes a multifunctional trestle suitable for tunnel inverted arch construction and a method thereof, but the method does not solve the problems of operation construction and transportation at the tunnel entrance of mountain tunnel, and has defects in use; chinese patent document CN 203462397U describes a tunnel trestle, which improves the anti-skid performance of the tunnel trestle by providing a cross section and a climbing section, but the device cannot solve the problems of construction and transportation at the entrance of a mountain tunnel, and cannot improve the efficiency of construction, so it needs to be improved.
Disclosure of Invention
The invention provides a steel trestle for assisting in entering a hole of a mountain tunnel and an installation method, which solve the problems that the steel trestle is troublesome to disassemble and assemble during the construction of a hole opening of the mountain tunnel, the terrain applicability is lower, and the raw materials cannot be recycled, and the stability is poor.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: a steel trestle for assisting in entering a tunnel in a mountain tunnel comprises a plurality of rows of first foundations, second foundations and fourth foundations, wherein the first foundations, the second foundations and the fourth foundations are arranged from top to bottom along the slope surface of a mountain side slope; and a parallel connection is further arranged and is used for fixedly connecting a plurality of stand columns.
In the preferred scheme, the top end of the first foundation is matched with the height of the face of the tunnel face, the second foundation is located below the I-shaped steel beam, the top end of the second foundation is matched with the height of the top end of the upright column, and the planes of the upper end faces of the first foundation, the second foundation and the fourth foundation are respectively parallel to the face of the tunnel face.
In the preferred scheme, still be equipped with the third basis, the third basis is located between second basis and the fourth basis, is equipped with diagonal draw bar on the third basis, and diagonal draw bar and stand are connected.
In a preferable scheme, inclined struts are symmetrically arranged among the plurality of upright posts, and guard rails are arranged on the outer side of the upper part of the bridge deck.
In a preferred scheme, the first foundation comprises a first bar-shaped base station, a first mortar anchor rod is arranged in the first bar-shaped base station, an anchoring steel bar is arranged on one side, close to the bridge deck, of the first mortar anchor rod, the anchoring steel bar is connected with the bridge deck, edge-covering angle steel is further arranged on the upper portion of the first bar-shaped base station, the edge-covering angle steel is located between the tunnel face and the first foundation, and the lower portion of the first mortar anchor rod is located in a mountain side slope;
the second foundation comprises a second strip-shaped base station, a second mortar anchor rod is arranged in the second strip-shaped base station, the lower portion of the second mortar anchor rod is located in a mountain slope, the upper portion of the second mortar anchor rod is connected with the stand column through a nut, and a first embedded steel plate is further arranged between the second mortar anchor rod and the I-shaped steel beam;
the fourth basis includes first mortar screed-coat, is equipped with the fourth mortar stock in the first mortar screed-coat, and the lower part of fourth mortar stock is located the mountain slope, and the upper portion of fourth mortar stock is passed through the nut and is connected with the stand, still is equipped with the pre-buried steel sheet of second between first mortar screed-coat and the stand.
In the preferred scheme, the third basis includes second mortar screed-coat, and the upper end of second mortar screed-coat is equipped with the third mortar stock towards stand lopsidedness in the second mortar screed-coat, and the lower part of third mortar stock is located mountain side slope, and the upper portion of third mortar stock is passed through the nut and is connected with the diagonal draw bar, still is equipped with the pre-buried steel sheet of third between second mortar screed-coat and the diagonal draw bar.
In a preferred scheme, two supporting plates are oppositely arranged on the side wall of the upright post, the two supporting plates are vertically arranged, the two supporting plates are respectively detachably connected with a diagonal draw bar and a parallel connection, a connecting plate is vertically arranged on each supporting plate, a plurality of first through holes are arranged on each connecting plate in a penetrating manner, a first rib plate is further arranged between each supporting plate and the upright post, a second rib plate is further arranged below each first rib plate, and each second rib plate is located on the outer side of the upright post;
the both ends of parallel connection are equipped with first installation department respectively, and first installation department runs through being equipped with a plurality of third through-holes including two second fixed plates that the symmetry set up on the second fixed plate, the one end of diagonal draw bar is equipped with the second installation department, and the second installation department runs through being equipped with the second through-hole including two first fixed plates that the symmetry set up on the first fixed plate, and the diameter of second through-hole and third through-hole is the same with first through-hole diameter respectively.
In a preferred scheme, the method for installing the steel trestle for assisting in entering the tunnel in the mountain tunnel comprises the following steps of:
s1, performing excavation construction on a mountain slope on one side of the tunnel, and clearing the slope surface of the mountain slope;
s2, communicating a first foundation, a second foundation, a third foundation and a fourth foundation of the operation steel trestle at the narrow terrain of the mountain side slope;
s3, drilling holes on a first foundation, a second foundation and a fourth foundation of the steel trestle, planting ribs, installing a first mortar anchor rod, a second mortar anchor rod, a third mortar anchor rod and a fourth mortar anchor rod, paving a second mortar leveling layer and a first mortar leveling layer according to installation positions, and then installing a first embedded steel plate, a third embedded steel plate and a second embedded steel plate;
s4, mounting upright posts on the fourth foundation, mounting diagonal draw bars between the upright posts and the third foundation, and fixing the upright posts by using parallel connection;
and S5, sequentially mounting an I-shaped steel beam, a Bailey sheet and a bridge deck on the upper part of the upright post.
In a preferred embodiment, the operation of S2 is performed in a blasting manner, and an area with a low efflorescence degree is selected for the operation.
In the preferable scheme, the height of the second foundation is equal to that of the upright columns in the space S4-S5, and the I-shaped steel beam, the Bailey pieces and the bridge deck are connected through door type buckle locking and fixing.
The invention has the beneficial effects that:
1. the upright post is arranged on a second embedded steel plate connected with the fourth mortar anchor rod, so that the earthing and embedding depth are avoided, the upright post is convenient to remove after the tunnel is finished, and the construction of the abutment is not influenced;
2. the diagonal draw bar is arranged between the upright post and the mountain slope and resists the transverse acting force of the construction vehicle on the steel trestle;
3. the parallel connection and the inclined strut are arranged between the upright posts, so that the overall stability of the steel trestle is improved;
4. the Bailey sheets, the I-shaped steel beams and the bridge deck are respectively fixed through the door-type buckles, so that the Bailey sheets, the I-shaped steel beams and the bridge deck are ensured not to have relative displacement, and the integral stability of the steel trestle structure is enhanced;
5. and a third mortar leveling layer is used for leveling between a third mortar anchor rod of a third foundation and a third embedded steel plate, and a fourth mortar anchor rod of a fourth foundation and a second embedded steel plate are leveled by a first mortar leveling layer, so that the phenomenon of hollowing at the bottoms of the third embedded steel plate and the second embedded steel plate is avoided.
The method has the advantages that the method adopts the first mortar anchor rod, the second mortar anchor rod, the third mortar anchor rod, the fourth mortar anchor rod, the first embedded steel plate, the second embedded steel plate and the third embedded steel plate to replace the foundation expansion, so that the excavation amount of the foundation construction in the early stage is greatly reduced, the foundation is easy to remove in the later stage, the influence on the subsequent construction is reduced, the construction period is shortened, the materials such as the steel plates can be recycled, and the economic benefit is improved;
adopting a method of 'diagonal draw bar + first foundation' to resist the transverse acting force of the construction vehicle on the trestle; the longitudinal acting force is resisted by the method of 'first bar-shaped base station + second bar-shaped base station + upright post transverse connection', the structure is convenient to assemble and disassemble integrally, does not influence cross operation, has good structural stability and anti-overturning capability, can provide a stable auxiliary access hole channel, and is small in trestle structure terrain limitation, high in universality, recyclable in materials and high in economic benefit.
Drawings
The invention is further illustrated by the following figures and examples.
FIG. 1 is a schematic top view of the present invention;
FIG. 2 is a schematic view of the invention from direction A-A;
FIG. 3 is a schematic view of the invention in the direction B-B;
FIG. 4 is a schematic view of the present invention in the direction C-C;
FIG. 5 is a first basic cross-sectional view of the present invention;
FIG. 6 is a second basic cross-sectional view of the present invention;
FIG. 7 is a third basic cross-sectional view of the present invention;
FIG. 8 is a fourth basic cross-sectional view of the present invention;
FIG. 9 is an exploded view of the column installation of the present invention;
FIG. 10 is a schematic view of the construction of the column of the present invention;
FIG. 11 is a schematic view of a flat coupling configuration of the present invention;
fig. 12 is a schematic structural view of a diagonal member of the present invention.
In the figure: a first base 1; a first mortar anchor 101; a first bar-shaped abutment 102; anchoring reinforcing bars 103; edge-covering angle steel 104; a second base 2; a second mortar anchor 201; a second submount 202 in strip form; a first pre-buried steel plate 203; a third base 3; a third mortar anchor 301; a second mortar screed 302; a third pre-buried steel plate 303; a fourth base 4; a fourth mortar anchor 401; a first mortar screed 402; a second pre-buried steel plate 403; a column 5; a support plate 501; a connection plate 502; a first via 503; a first rib 504; a second rib 505; an I-beam 6; a Bailey sheet 7; a bridge deck 8; a diagonal member 9; a first fixing plate 901; a second through hole 902; a parallel connection 10; a second fixing plate 1001; a third through hole 1002; a diagonal brace 11; a guard rail 12; mountain side slope 13; a palm surface 14; a construction vehicle 15; the tunnel runs 16.
Detailed Description
As shown in fig. 1-12, an auxiliary steel trestle for entering a tunnel in a mountain tunnel comprises a plurality of rows of first foundations 1, second foundations 2 and fourth foundations 4 arranged from top to bottom along the slope surface of a mountain side slope 13, wherein an upright post 5 is arranged on the fourth foundation 4, an i-shaped steel beam 6 is supported on the upright post 5, one side of the i-shaped steel beam 6 is connected with the second foundation 2, a plurality of bailey pieces 7 are detachably arranged on the i-shaped steel beam 6, a bridge deck 8 is connected to each bailey piece 7, and one side of the bridge deck 8 is connected with the first foundation 1; a parallel connection 10 is further arranged, and the parallel connection 10 is used for fixedly connecting a plurality of upright posts 5. From this structure to make through the slope surface setting support at mountain slope 13, thereby build holistic construction platform, construction platform and face 14 link up, and need not shift back the face whole 14, improved the efficiency of construction, whole stable convenient quick.
In a preferable scheme, the top end of the first foundation 1 is matched with the surface height of the tunnel face 14, the second foundation 2 is located below the I-shaped steel beam 6, the top end of the second foundation 2 is matched with the top end height of the upright post 5, and planes of the upper end faces of the first foundation 1, the second foundation 2 and the fourth foundation 4 are respectively parallel to the surface of the tunnel face 14. From this structure to make first basis 1 and face 14 connect, guaranteed the stability of steel trestle, second basis 2 and stand 5 can be with I-steel roof beam 6 symmetric support, guaranteed the holistic level of I-steel roof beam 6, and then the support nature is better.
In the preferred scheme, a third foundation 3 is further arranged, the third foundation 3 is located between the second foundation 2 and the fourth foundation 4, a diagonal draw bar 9 is arranged on the third foundation 3, and the diagonal draw bar 9 is connected with the upright post 5. From this structure to when making the interval between stand 5 and mountain ridge side slope 13 great, oblique pull rod 9 can play the effect of antidumping, guarantees steel trestle's safety and stability, and the suitability is better.
In a preferable scheme, inclined struts 11 are further symmetrically arranged among the plurality of upright posts 5, and guard rails 12 are further arranged on the outer side of the upper portion of the bridge deck 8. With the structure, the inclined struts 11 connect the plurality of the upright columns 5, and the bearing capacity of the inclined struts 11 is evenly distributed on each upright column 5, so that the overall bearing capacity is improved, and the protective guard 12 avoids the risk of falling of personnel or articles during construction.
In a preferable scheme, the first foundation 1 comprises a first bar-shaped base 102, a first mortar anchor rod 101 is arranged in the first bar-shaped base 102, an anchoring steel bar 103 is arranged on one side, close to the bridge deck 8, of the first mortar anchor rod 101, the anchoring steel bar 103 is connected with the bridge deck 8, edge-covering angle steel 104 is further arranged on the upper portion of the first bar-shaped base 102, the edge-covering angle steel 104 is located between the tunnel face 14 and the first foundation 1, and the lower portion of the first mortar anchor rod 101 is located in a mountain side slope 13;
the second foundation 2 comprises a second strip-shaped base 202, a second mortar anchor rod 201 is arranged in the second strip-shaped base 202, the lower portion of the second mortar anchor rod 201 is located in a mountain side slope 13, the upper portion of the second mortar anchor rod 201 is connected with the upright post 5 through a nut, and a first embedded steel plate 203 is further arranged between the second mortar anchor rod 201 and the I-shaped steel beam 6;
In the preferred scheme, third basis 3 includes second mortar screed-layer 302, and the up end of second mortar screed-layer 302 inclines to stand 5 one side, is equipped with third mortar stock 301 in the second mortar screed-layer 302, and the lower part of third mortar stock 301 is located mountain slope 13, and the upper portion of third mortar stock 301 is passed through the nut and is connected with oblique pull rod 9, still is equipped with the pre-buried steel sheet 303 of third between second mortar screed-layer 302 and the oblique pull rod 9. By the structure, the third mortar leveling layer is used for leveling between the third mortar anchor rod of the third foundation and the third embedded steel plate, and the phenomenon of void at the bottom of the third embedded steel plate is avoided.
In a preferable scheme, two supporting plates 501 are oppositely arranged on the side wall of the upright post 5, the two supporting plates 501 are vertically arranged, the two supporting plates 501 are respectively detachably connected with a diagonal draw bar 9 and a parallel connection 10, a connecting plate 502 is vertically arranged on the supporting plates 501, a plurality of first through holes 503 are arranged on the connecting plate 502 in a penetrating manner, a first ribbed plate 504 is further arranged between the supporting plates 501 and the upright post 5, a second ribbed plate 505 is further arranged below the first ribbed plate 504, and the second ribbed plate 505 is positioned on the outer side of the upright post 5;
the both ends of parallel connection 10 are equipped with first installation department respectively, and first installation department is including two second fixed plates 1001 that the symmetry set up, runs through on the second fixed plate 1001 and is equipped with a plurality of third through holes 1002, the one end of diagonal member 9 is equipped with the second installation department, and the second installation department is including two first fixed plates 901 that the symmetry set up, runs through on the first fixed plate 901 and is equipped with second through hole 902, and the diameter of second through hole 902 and third through hole 1002 is the same with first through hole 503 diameter respectively. From this structure, so that stand 5, bracing 9 and antithetical couplet 10 and bracing 11 can in time adjust the position in the work progress, guarantee holistic installation accuracy, thereby the top of all stands 5 can be guaranteed to make the surfacing of decking 8 at the coplanar, provide steady support for the removal of construction operation and transport vechicle 15, and each part is recoverable repetitious usage after accomplishing the construction, and structural performance stability is good, guaranteed holistic atress equilibrium simultaneously, bearing capacity is strong.
In a preferred scheme, the method for installing the steel trestle for assisting in entering the tunnel in the mountain tunnel comprises the following steps of:
s1, performing excavation construction on the mountain side slope 13 on one side of the tunnel, and clearing the slope surface of the mountain side slope 13; the tunnel face 14 is cleaned, the smoothness of the tunnel face 14 is guaranteed, and due to the structure, construction is convenient, the slope surface of the mountain slope 13 is cleared, proper areas can be selected for construction operation, and the overall safety, stability and construction efficiency are guaranteed.
S2, connecting a first foundation 1, a second foundation 2, a third foundation 3 and a fourth foundation 4 of the steel trestle at the narrow terrain of the mountain slope 13; the structure provides stable and firm support for the construction of the steel trestle.
S3, drilling holes and planting ribs on a first foundation 1, a second foundation 2 and a fourth foundation 4 of the steel trestle, installing a first mortar anchor rod 101, a second mortar anchor rod 201, a third mortar anchor rod 301 and a fourth mortar anchor rod 401, laying a second mortar leveling layer 302 and a first mortar leveling layer 402 according to installation positions, and then installing a first embedded steel plate 203, a third embedded steel plate 303 and a second embedded steel plate 403; from this structure to make adopt suitable bearing mode to fix the steel trestle, guarantee the stability of structure and the high efficiency of construction.
S4, mounting upright posts 5 on the fourth foundation 4, mounting diagonal draw bars 9 between the upright posts 5 and the third foundation 3, and fixing the upright posts 5 by using parallel connection 10 respectively; from this structure to make and guarantee holistic safety, play the effect of preventing toppling, thereby guarantee that stand 5 vertically supports on fourth basis 4.
And S5, sequentially mounting the I-shaped steel beam 6, the Bailey sheet 7 and the bridge deck 8 on the upper part of the upright post 5. From this structure to make whole support steady, the installation is quick, and holistic efficiency of construction is high, and bearing capacity is strong.
In a preferred embodiment, the operation of S2 is performed in a blasting manner, and an area with a low efflorescence degree is selected for the operation. From this structure, in order to make through first basis 1, second basis 2, the support steel trestle that third basis 3 and fourth basis 4 can be stable is whole, because mountain ridge side slope 13's rock layer weathering degree is different, select the lower region of weathering degree, the relative stability of rock layer inner structure has been guaranteed, the weathering crack is difficult for perceiving, the tissue of mineral substance does not take place obvious change, physical properties has been guaranteed, thereby provide sufficient mechanical strength for the steel trestle, the whole safety of steel trestle has been guaranteed firm.
In the preferable scheme, the height of the second foundation 2 is equal to that of the upright post 5 in the space S4-S5, and the I-shaped steel beam 6, the Bailey pieces 7 and the bridge deck 8 are connected through door type buckle locking and fixing. With the structure, the bridge deck 8 can be smoothly connected on the tunnel face 14, and the door type buckle connection is adopted, so that the bridge deck is more convenient.
The above-described embodiments are merely preferred embodiments of the present invention, and should not be construed as limiting the present invention, and the scope of the present invention is defined by the claims, and equivalents including technical features described in the claims. I.e., equivalent alterations and modifications within the scope hereof, are also intended to be within the scope of the invention.
Claims (10)
1. The utility model provides a supplementary steel trestle of entering hole in mountain tunnel which characterized by: the multi-row bridge structure is characterized by comprising a plurality of rows of first foundations (1), second foundations (2) and fourth foundations (4) which are arranged from top to bottom along the slope surface of a mountain side slope (13), wherein an upright post (5) is arranged on each fourth foundation (4), an I-shaped steel beam (6) is supported on each upright post (5), one side of each I-shaped steel beam (6) is connected with each second foundation (2), a plurality of Bailey pieces (7) are detachably arranged on each I-shaped steel beam (6), a bridge deck (8) is connected onto each Bailey piece (7), and one side of each bridge deck (8) is connected with each first foundation (1); the device is also provided with a parallel connection (10), and the parallel connection (10) is used for fixedly connecting a plurality of upright posts (5).
2. The steel trestle for assisting in entering into a cave of a mountain tunnel according to claim 1, which is characterized in that: the top and the face (14) surface height phase-match of first basis (1), second basis (2) are located the below of I-steel roof beam (6), the top of second basis (2) and the top height phase-match of stand (5), the up end place plane of first basis (1), second basis (2) and fourth basis (4) is parallel with face (14) surface respectively.
3. The steel trestle for assisting in entering into a cave of a mountain tunnel according to claim 1, which is characterized in that: still be equipped with third basis (3), third basis (3) are located between second basis (2) and fourth basis (4), are equipped with diagonal draw bar (9) on third basis (3), and diagonal draw bar (9) and stand (5) are connected.
4. The steel trestle for assisting in entering into a cave of a mountain tunnel according to claim 1, which is characterized in that: inclined struts (11) are symmetrically arranged among the plurality of upright posts (5), and guard rails (12) are arranged on the outer side of the upper portion of the bridge deck (8).
5. The steel trestle for assisting in entering the tunnel of the mountain tunnel according to claim 1, which is characterized in that: the first foundation (1) comprises a first strip-shaped base (102), a first mortar anchor rod (101) is arranged in the first strip-shaped base (102), an anchoring steel bar (103) is arranged on one side, close to the bridge deck (8), of the first mortar anchor rod (101), the anchoring steel bar (103) is connected with the bridge deck (8), edge-covering angle steel (104) is further arranged on the upper portion of the first strip-shaped base (102), the edge-covering angle steel (104) is located between the tunnel face (14) and the first foundation (1), and the lower portion of the first mortar anchor rod (101) is located in a mountain ridge slope (13);
the second foundation (2) comprises a second strip-shaped base station (202), a second mortar anchor rod (201) is arranged in the second strip-shaped base station (202), the lower portion of the second mortar anchor rod (201) is located in a mountain slope (13), the upper portion of the second mortar anchor rod (201) is connected with the upright post (5) through a nut, and a first embedded steel plate (203) is further arranged between the second mortar anchor rod (201) and the I-shaped steel beam (6);
fourth basis (4) are equipped with fourth mortar stock (401) in first mortar screed-coat (402), and the lower part of fourth mortar stock (401) is located mountain ridge side slope (13), and the upper portion of fourth mortar stock (401) is passed through the nut and is connected with stand (5), still is equipped with pre-buried steel sheet of second (403) between first mortar screed-coat (402) and stand (5).
6. The steel trestle for assisting in entering into a cave of a mountain tunnel according to claim 3, which is characterized in that: third basis (3) include second mortar screed-coat (302), and the up end of second mortar screed-coat (302) is to stand (5) lopsidedness, is equipped with third mortar stock (301) in second mortar screed-coat (302), and the lower part of third mortar stock (301) is located mountain ridge slope (13), and the upper portion of third mortar stock (301) is passed through the nut and is connected with oblique pull rod (9), still is equipped with pre-buried steel sheet of third (303) between second mortar screed-coat (302) and oblique pull rod (9).
7. The steel trestle for assisting in entering into a cave of a mountain tunnel according to claim 1, which is characterized in that: the side wall of the upright post (5) is relatively provided with two supporting plates (501), the two supporting plates (501) are vertically arranged, the two supporting plates (501) are respectively detachably connected with a diagonal draw bar (9) and a parallel connection (10), the supporting plates (501) are vertically provided with connecting plates (502), the connecting plates (502) are provided with a plurality of first through holes (503) in a penetrating manner, a first rib plate (504) is further arranged between the supporting plates (501) and the upright post (5), a second rib plate (505) is further arranged below the first rib plate (504), and the second rib plate (505) is positioned on the outer side of the upright post (5);
the both ends of parallel connection (10) are equipped with first installation department respectively, and first installation department is including two second fixed plate (1001) that the symmetry set up, runs through on second fixed plate (1001) and is equipped with a plurality of third through-holes (1002), the one end of diagonal draw bar (9) is equipped with the second installation department, and the second installation department is including two first fixed plate (901) that the symmetry set up, runs through on first fixed plate (901) and is equipped with second through-hole (902), and the diameter of second through-hole (902) and third through-hole (1002) is the same with first through-hole (503) diameter respectively.
8. A method for installing a steel trestle for assisting in entering a tunnel in a mountain tunnel is characterized by comprising the following steps of: the method comprises the following steps:
s1, performing excavation construction on the mountain slope (13) on one side of the tunnel, and clearing the slope surface of the mountain slope (13);
s2, communicating a first foundation (1), a second foundation (2), a third foundation (3) and a fourth foundation (4) of the operation steel trestle at the narrow terrain of a mountain side slope (13);
s3, drilling holes in a first foundation (1), a second foundation (2) and a fourth foundation (4) of the steel trestle, planting ribs, installing a first mortar anchor rod (101), a second mortar anchor rod (201), a third mortar anchor rod (301) and a fourth mortar anchor rod (401), laying a second mortar leveling layer (302) and a first mortar leveling layer (402) according to installation positions, and then installing a first embedded steel plate (203), a third embedded steel plate (303) and a second embedded steel plate (403);
s4, mounting upright posts (5) on a fourth foundation (4), mounting diagonal draw bars (9) between the upright posts (5) and a third foundation (3), and fixing the upright posts (5) by using parallel connection (10);
s5, sequentially mounting an I-shaped steel beam (6), a Bailey sheet (7) and a bridge deck (8) on the upper portion of the upright post (5).
9. The method for installing the steel trestle for assisting in entering the cave of the mountain tunnel as claimed in claim 8, wherein: the operation of S2 is performed in a blasting manner, and an area with a low efflorescence degree is selected for operation.
10. The method for installing the steel trestle for assisting in entering the cave of the mountain tunnel as claimed in claim 8, wherein: the height of the second foundation (2) is equal to that of the upright post (5) in the space S4-S5, and the I-shaped steel beam (6), the Bailey sheet (7) and the bridge deck (8) are connected and locked by the door-type fastener.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110490899.XA CN113152247B (en) | 2021-05-06 | 2021-05-06 | Steel trestle for assisting in entering cave of mountain tunnel and installation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110490899.XA CN113152247B (en) | 2021-05-06 | 2021-05-06 | Steel trestle for assisting in entering cave of mountain tunnel and installation method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113152247A true CN113152247A (en) | 2021-07-23 |
| CN113152247B CN113152247B (en) | 2023-02-17 |
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| KR101648424B1 (en) * | 2015-07-17 | 2016-08-16 | (주)지케이우드 | Deckroad System And Constructure Method Thereof |
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| CN209292860U (en) * | 2018-11-21 | 2019-08-23 | 武汉市市政建设集团有限公司 | A kind of steel trestle can be used for overhanging cliff |
| CN112095439A (en) * | 2020-09-07 | 2020-12-18 | 中国建筑第八工程局有限公司 | Method for constructing transportation platform between canyon tunnels and structure of transportation platform |
| CN214882883U (en) * | 2021-05-06 | 2021-11-26 | 中交第二航务工程局有限公司 | Be used for supplementary steel trestle of mountain tunnel entering hole |
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| KR101648424B1 (en) * | 2015-07-17 | 2016-08-16 | (주)지케이우드 | Deckroad System And Constructure Method Thereof |
| CN105888249A (en) * | 2016-04-27 | 2016-08-24 | 杨毅 | Temporary site extension construction method for little slope cutting edge road arrangement in mountain site |
| CN108301332A (en) * | 2018-04-10 | 2018-07-20 | 安徽宝翔建设集团有限责任公司 | The detachable steel trestle construction method of beret slice |
| CN209292860U (en) * | 2018-11-21 | 2019-08-23 | 武汉市市政建设集团有限公司 | A kind of steel trestle can be used for overhanging cliff |
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