CN109205475B - Device and method for assembling and disassembling girder type gantry crane in tunnel through connection of trusses - Google Patents
Device and method for assembling and disassembling girder type gantry crane in tunnel through connection of trusses Download PDFInfo
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- CN109205475B CN109205475B CN201811142019.4A CN201811142019A CN109205475B CN 109205475 B CN109205475 B CN 109205475B CN 201811142019 A CN201811142019 A CN 201811142019A CN 109205475 B CN109205475 B CN 109205475B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C19/00—Cranes comprising trolleys or crabs running on fixed or movable bridges or gantries
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C5/00—Base supporting structures with legs
- B66C5/02—Fixed or travelling bridges or gantries, i.e. elongated structures of inverted L or of inverted U shape or tripods
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C6/00—Girders, or track-supporting structures, specially adapted for cranes
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- Leg Units, Guards, And Driving Tracks Of Cranes (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention provides a device and a method for assembling and disassembling a truss-linked beam type gantry in a tunnel. This device can be at narrow and small tunnel space easy to assemble a quick-witted main structure device, has solved the construction difficult problem of door machine installation in the tunnel, but similar projects such as door machine installation dismantlement in the wide application hydraulic engineering tunnel.
Description
Technical Field
The invention relates to the field of auxiliary installation of a gantry crane, in particular to a device and a method for installing a girder type gantry crane in a tunnel through a truss connection, which are suitable for installing a main structure device of the gantry crane in a narrow space of the tunnel.
Background
A unit is to remove a TBM tunnel boring machine weighing 680 tons and 8m in diameter in the tunnel. An urban portal-shaped enlarged excavation hole with the height of 14.2m is planned to be excavated manually. And 3 rows of holes with the depth of 3m are drilled on the rock on the top of the tunnel, bearing anchor rods with the length of 3.5m and the diameter of 25cm are installed, 3I 32 type I-shaped steel hanging rails are welded and installed below the anchor rods, and 10 tons of electric hoists are hung below the I-shaped steel and used for installing a 75t +75t double-main-girder gantry crane. In addition, 8 anchor bolt holes of the guy cable are drilled at the bottom of the expanding excavation section and are used for fixing 4 main supporting legs of the gantry crane. Because the height of the expanded excavation hole exceeds 14m, the rock at the top of the expanded excavation hole is drilled with an anchor rod hole, and the load-bearing anchor rod with the length of 25cm and the length of 3.5m is difficult to install. The I32c type I-shaped steel hanger rail has unit weight of 62.8Kg/m and length of 18m and weight of 1.13 tons. The I-shaped steel hanger rail is lifted to a bearing anchor rod with the height of 14m from the ground, the hanger rail is ensured to be horizontal, straight and smooth, the I-shaped steel hanger rail is aligned with the anchor rod and is firmly welded, and the mounting difficulty of the hanger rail is also very high.
In addition, because the tunnel space of the expanding excavation section is too small, three hanging rails are three positioning and mounting lines, and the parallelism of the three hanging rails is difficult to ensure. Even if the I32I-shaped steel hanger rail is installed in place, the hanger rail occupies at least 600mm of space height, the minimum height of the 10-ton electric hoist is 1.6m, the height of the hanger rail and the minimum height of the electric hoist together occupies at least 2m, the minimum height of the gantry crane reaches 12m, the rest lifting height is 12m, and the gantry crane main beam cannot be installed at all. When 4 main support legs of the gantry crane are respectively hung on two bottom beams by a truck crane, 16 cables are needed to pull the 4 main support legs. 16 cable wind ropes and 4 main supporting legs can occupy most of space of the expanding and digging section, and the positions and the spaces of the double main girders of the gantry crane box type are basically not assembled and hoisted. And hoisting equipment such as an automobile crane is adopted, and a gantry crane cannot be installed in the tunnel. The gantry crane cannot be installed in the tunnel, and the TBM tunneling machine cannot be dismantled in the tunnel.
Disclosure of Invention
In order to solve the technical problems, the device and the method for assembling and disassembling the truss-linked beam type door machine in the tunnel are provided, the device can be used for conveniently installing a door machine main structure device in a narrow tunnel space, solve the construction problem of installing the door machine in the tunnel, and can be widely applied to similar projects such as installing and disassembling the door machine in a hydraulic engineering tunnel.
In order to achieve the technical features, the invention is realized as follows: device is installed and removed to truss connection beam type door machine in tunnel, it includes artifical tunnel excavation section, excavate after artifical tunnel excavation section that there is the upper reaches tunnel to expand the section of digging, excavate after the section is expanded to the upper reaches tunnel and expand to dig and increase the section, the tunnel expands to dig after increasing the section to have the low reaches tunnel to expand to dig the section, the low reaches tunnel expands to be provided with the entry driving machine after digging the section and digs the tunnel.
The manual tunnel excavation section, the upstream tunnel expand and dig the section, the tunnel expands and digs the section of heightening and the downstream tunnel expands and dig the bottom of section and has laid the gantry crane track, it has two girder formula gantry cranes to support on the gantry crane track.
The double-girder type gantry crane comprises a travelling wheel box, a gantry crane bottom beam is supported at the top of the travelling wheel box, a connecting beam is arranged between the tops of the gantry crane bottom beams in a spanning mode, stand columns are supported at two ends of the top of the connecting beam, a gantry crane main supporting leg is supported and installed on each stand column through a supporting leg upper end adjusting device, the bottom of the gantry crane main supporting leg is fixed on the gantry crane bottom beam, a gantry crane box girder is supported at the top of each stand column, the gantry crane box girders are fixedly connected through a girder connecting beam, and a crane trolley is supported and installed at the top of the gantry crane box girder.
The gantry crane track is laid on a concrete track foundation, and the concrete track foundation is poured at the bottoms of the artificial tunnel excavation section, the upstream tunnel excavation expanding section, the tunnel excavation expanding section and the downstream tunnel excavation expanding section.
And a rod piece for temporarily fixing the connecting beam and the bottom beam of the gantry crane is arranged between the connecting beam and the bottom beam of the gantry crane.
And an upright post support rod used for temporarily fixing the upright post and the bottom beam of the gantry crane is arranged between the upright post and the bottom beam of the gantry crane.
The connecting beam and the upright post are assembled by adopting a plurality of standard truss structures.
The method for installing the gantry crane by adopting any one device for installing and disassembling the truss-linked beam type gantry crane in the tunnel comprises the following steps:
step 1: two gantry crane tracks are laid at the bottoms of the manual tunnel excavation section, the upstream tunnel expanding excavation section, the tunnel expanding excavation heightening section and the downstream tunnel expanding excavation section;
step 2: installing the travelling wheel boxes on the gantry crane rails, and respectively hoisting two gantry crane bottom beams onto the travelling wheel boxes on the two gantry crane rails by using a truck crane;
step 3: after the two door machine bottom beams are leveled, temporarily fixing the door machine bottom beams with the ground by using a rod piece, hoisting and supporting the assembled connecting beam on the tops of the two door machine bottom beams in a crossing manner, and temporarily fixing the two door machine bottom beams by using the rod piece so as to form an integral structure;
step 4: respectively vertically hoisting two upright columns at two end positions of a connecting beam, temporarily fixing the upright columns, and temporarily fixing the upright columns and a bottom beam of a door machine by adopting upright column support rods;
step 5: dismantling a rod piece temporarily fixed between a bottom beam of the gantry crane and the ground, and ensuring that the travelling wheel box can freely travel on a track of the gantry crane;
step 6: hoisting a main landing leg of a first portal crane to a proper height by using a truck crane according to a combination mode of a jack rope and a chain hoist, manually pushing a bottom beam of the portal crane into a proper position below a hoisting point of the truck crane along a track of the portal crane, operating the truck crane to hoist the main landing leg of the first portal crane at the front end of the bottom beam of the portal crane, aligning the lower end of the main landing leg of the first portal crane with a flange of the bottom beam of the portal crane, penetrating a bolt for screwing, and firmly connecting the upper end of the main landing leg of the first portal crane with an upper end adjusting device of a landing leg arranged at the upper end of an upright post to finish the installation of the main landing leg;
step 7: the Step6 is repeated to sequentially complete the installation of the main supporting leg of the second gantry crane, the main supporting leg of the third gantry crane and the main supporting leg of the fourth gantry crane; further completing the fixed installation of four main supporting legs of the double-main-beam gantry crane;
step 8: mounting a box girder of the gantry crane;
step 9: and (5) installing the crane trolley.
The specific operation steps in Step8 are as follows:
step8.1: two gantry crane bottom beams provided with 4 gantry crane main supporting legs are pushed to a downstream tunnel expanding excavation section along a gantry crane rail and are stopped stably at a proper position, and then a support pad is adopted for limiting between a travelling wheel box and the gantry crane rail;
step8.2: assembling the box girders of the gantry crane at the positions of the main support legs of the gantry crane installed on the original double-girder gantry crane by using a truck crane, and fixing the box girders of the gantry crane by using girder connecting beams;
step8.3: after the assembly of the portal crane box girder is completed, the portal crane box girder is lifted to the highest point of the tunnel expanding and excavating heightening section by a truck crane, and a portal crane bottom beam parked at the expanding and excavating section of the downstream tunnel is pushed to a position right below the portal crane box girder at the upstream position to stop;
step8.4: 4 groups of people respectively stand in front of the main landing leg of the portal crane and the connecting flange of the main girder of the portal crane, simultaneously align the flange hole of the box girder of the portal crane and the flange hole of the main landing leg of the portal crane, penetrate the connecting bolt, then slowly hang the box girder of the portal crane on the main landing leg of the portal crane, and tighten the bolt to finish the installation of the box girder of the portal crane and the main landing legs of 4 portal cranes;
step8.5: and (4) removing the two upright columns and the truss type connecting beam.
The specific operation steps in Step9 are as follows:
step9.1: after the box girders of the gantry crane are installed, operating the small hooks of the truck crane by utilizing gaps among the box girders of the gantry crane to descend to the ground from among the box girders of the gantry crane;
step9.2: the assembled hoisting trolley is hoisted from the ground to penetrate through the box-shaped main beam of the gantry crane, so that the hoisting trolley is positioned above the box-shaped main beam of the gantry crane;
step9.3: turning the trolley by 90 degrees, aligning the travelling wheel box steel wheels of the trolley with the square steel of the track on the box girder of the portal crane, and falling on the track, thus finishing the installation of the first trolley;
and step9.3, repeating the step9.1 ~ step9.3 to hoist the second hoisting trolley and finish the installation of the second hoisting trolley, thereby finishing the installation of the whole double-girder gantry crane.
The invention has the following beneficial effects:
1. structurally: the travelling wheel box steel wheels arranged at two ends of the lower plane of the two gantry crane bottom beams respectively fall on the two gantry crane tracks, the truss type connecting beam is erected on the upper plane of the two gantry crane bottom beams and is temporarily and firmly fixed with the connecting beam, so that the two gantry crane bottom beams form a stable structure body, the connecting beam is manually pushed, the gantry crane bottom beams can integrally and synchronously travel forwards or backwards along the gantry crane tracks, and further the subsequent hoisting of the gantry crane box girder is facilitated.
2. Adopt above-mentioned structure to guarantee can be in narrow and small tunnel space, adopt the fixed point to lift by crane through the truck crane, the hoist and mount of two girder type door machines are accomplished to the hoist and mount method of small-angle deflection, two girder type door machines can promote around the door machine track along adopting, the hoist and mount point of tunnel truck crane, remove the operation method of mounted position, can install door machine owner landing leg and door machine box girder structure very conveniently, the construction difficult problem of door machine installation in the tunnel has effectively been solved, but similar projects such as the door machine installation demolishs in the hydraulic engineering tunnel of wide application.
3. Through adopting foretell tie beam can be connected two gantry crane floorbars and become whole, and then made things convenient for and can promote its along gantry crane rail-engaging.
4. The main landing leg of the door machine can be conveniently installed in an auxiliary mode through the stand column, so that the installation efficiency is improved, and the safety of the installation process is guaranteed.
Drawings
The invention is further illustrated by the following figures and examples.
FIG. 1 is a schematic structural view of a tunnel excavation expanding section and a door machine.
Fig. 2 is a structural schematic diagram of a bottom beam and a connecting beam of the gantry crane.
Fig. 3 is a schematic view of the installation of the main support leg of the gantry crane.
Fig. 4 is a schematic diagram of hoisting of a box-shaped double main beam of a gantry crane.
In the figure: the tunnel excavating machine comprises a gantry crane track 1, an artificial tunnel excavating section 2, an upstream tunnel excavating section 3, a double-main-beam gantry crane 4, a tunnel excavating heightening section 5, a downstream tunnel excavating section 6, a tunnel excavating machine 7, a traveling wheel box 8, a gantry crane bottom beam 9, a rod piece 10, a stand strut 11, a stand 12, a connecting beam 13, a concrete track foundation 14, a leg upper end adjusting device 15, a gantry crane main leg 16, a gantry crane box main beam 17, a main beam connecting beam 18 and a hoisting trolley 19.
Detailed Description
Embodiments of the present invention will be further described with reference to the accompanying drawings.
Example 1:
referring to fig. 1-4, the device for assembling and disassembling the truss-linked beam gantry crane in the tunnel comprises an artificial tunnel excavation section 2, an upstream tunnel excavation expanding section 3 is excavated behind the artificial tunnel excavation section 2, a tunnel excavation expanding and heightening section 5 is excavated behind the upstream tunnel excavation expanding section 3, a downstream tunnel excavation expanding section 6 is excavated behind the tunnel excavation expanding and heightening section 5, and a tunnel excavation machine 7 is arranged behind the downstream tunnel excavation expanding section 6. Artifical tunnel excavation section 2, the upper reaches tunnel expand dig section 3, the tunnel expands to dig increase section 5 and the low reaches tunnel expands the bottom of digging section 6 and has laid a quick-witted track 1, it has two girder type door machines 4 to support on the quick-witted track 1 of door. Further, the double-girder type portal crane 4 comprises a traveling wheel box 8, a portal crane bottom beam 9 is supported at the top of the traveling wheel box 8, a connecting beam 13 is installed between the tops of the portal crane bottom beams 9 in a spanning mode, upright columns 12 are supported at two ends of the top of the connecting beam 13, portal crane main supporting legs 16 are supported and installed on the upright columns 12 through supporting leg upper end adjusting devices 15, the bottoms of the portal crane main supporting legs 16 are fixed on the portal crane bottom beams 9, portal crane box-shaped girders 17 are supported at the tops of the upright columns 12, the portal crane box-shaped girders 17 are fixedly connected through girder connecting beams 18, and a crane trolley 19 is supported and installed at the tops of the portal crane box-shaped girders 17. The assembly and disassembly device with the structure can assist in completing the assembly and disassembly operation of the double-girder type gantry crane 4, so that the problem that the operation space of the double-girder type gantry crane 4 is insufficient in the narrow tunnel space is effectively solved, the installation efficiency is greatly improved, and the operation safety is guaranteed.
Further, the gantry crane track 1 is laid on a concrete track foundation 14, and the concrete track foundation 14 is poured at the bottoms of the artificial tunnel excavation section 2, the upstream tunnel excavation expanding section 3, the tunnel excavation expanding section 5 and the downstream tunnel excavation expanding section 6. The stability of its support is ensured by the concrete track foundation 14.
Further, a rod 10 for temporarily fixing the connecting beam 13 and the door machine bottom beam 9 is arranged between the connecting beam and the door machine bottom beam. The temporary fixation between the tie beam 13 and the door machine sill 9 is facilitated by the use of the bar 10.
Further, a stand strut 11 for temporarily fixing the stand 12 and the bottom beam 9 is arranged between the stand and the bottom beam. The temporary fixation between the upright 12 and the door sill 9 is facilitated by the use of a rod 10.
Furthermore, the connecting beam 13 and the upright post 12 are assembled by adopting a plurality of standard truss structures. The connecting structure is simplified by adopting the standard truss structure for assembly, so that the assembly is convenient.
Example 2:
the method for installing the gantry crane by adopting any one device for installing and disassembling the truss-linked beam type gantry crane in the tunnel comprises the following steps:
step 1: laying two gantry crane tracks 1 at the bottoms of the artificial tunnel excavation section 2, the upstream tunnel expanding excavation section 3, the tunnel expanding excavation heightening section 5 and the downstream tunnel expanding excavation section 6;
step 2: installing a travelling wheel box 8 on the gantry crane track 1, and respectively hoisting two gantry crane bottom beams 9 onto the travelling wheel boxes 8 on the gantry crane tracks 1 by using a truck crane;
step 3: after the two gantry crane bottom beams 9 are leveled, the gantry crane bottom beams 9 are temporarily fixed with the ground by using the rod pieces 10, then the assembled connecting beams 13 are hoisted and supported across the tops of the two gantry crane bottom beams 9, and are temporarily fixed by using the rod pieces 10, so that the two form an integral structure;
step 4: the two upright posts 12 are respectively vertically hung at two end positions of a connecting beam 13 and temporarily fixed, and then the upright posts 12 and the bottom beam 9 of the gantry crane are temporarily fixed by adopting upright post support rods 11;
step 5: dismantling a rod piece 10 temporarily fixed between a bottom beam 9 of the gantry crane and the ground to ensure that the traveling wheel box 8 can freely travel on the gantry crane track 1;
step 6: hoisting a main landing leg 16-A of a first portal crane to a proper height by using a truck crane according to a combined mode of a lifting rope and a chain hoist, manually pushing a bottom beam 9 of the portal crane into a proper position below a lifting point of the truck crane along a track 1 of the portal crane, operating the truck crane to hoist the main landing leg 16-A of the first portal crane at the front end of the bottom beam 9 of the portal crane, aligning the lower end of the main landing leg 16-A of the first portal crane with a flange of the bottom beam 9 of the portal crane, penetrating a bolt for screwing, and firmly connecting the upper end of the main landing leg 16-A of the first portal crane with an upper end adjusting device 15 of a landing leg arranged at the upper end of an upright post 12 to finish the installation of the main landing leg 16-A of;
step 7: the Step6 is repeated to sequentially complete the installation of the second gantry crane main supporting leg 16-B, the third gantry crane main supporting leg 16-C and the fourth gantry crane main supporting leg 16-C; thereby completing the fixed installation of four main supporting legs of the double-main-beam gantry crane 4;
step 8: installing a box girder 17 of the gantry crane;
step 9: the installation of the trolley 19 is performed.
The specific operation steps in Step8 are as follows:
step8.1: two gantry crane bottom beams 9 provided with 4 gantry crane main supporting legs 16 are pushed to a downstream tunnel expanding excavation section 6 along a gantry crane track 1 and are stopped and stabilized at a proper position, and then a support pad is adopted for limiting between a travelling wheel box 8 and the gantry crane track 1;
step8.2: assembling the box girders 17 of the portal crane at the positions of the main support legs 16 of the portal crane 4 of the original double-girder type portal crane by using a truck crane, and fixing the box girders 17 of the portal crane by using girder connecting beams 18;
step8.3: after the assembly of the portal crane box girder 17 is completed, the portal crane box girder 17 is hoisted to the highest point of the tunnel expanding and digging heightening section 5 by using a truck crane, and the portal crane bottom beam 9 parked at the downstream tunnel expanding and digging section 6 is pushed to the position right below the upstream portal crane box girder 17 to stop;
step8.4: 4 groups of persons stand respectively in front of the connecting flanges of the main support legs 16 and the main frame 17 of the portal crane, simultaneously align the flange holes of the box-shaped main frame 17 of the portal crane with the flange holes of the main support legs 16 of the portal crane, penetrate the connecting bolts, slowly hang the box-shaped main frame 17 of the portal crane on the main support legs 16 of the portal crane, and tighten the bolts to finish the installation of the box-shaped main frame 17 of the portal crane and the main support legs 16 of 4 portal cranes;
step8.5: two upright columns 12 are removed, and a truss type connecting beam 13 is removed.
The specific operation steps in Step9 are as follows:
step9.1: after the box girders 17 of the gantry crane are installed, the small hooks of the truck crane are operated by utilizing the gaps among the box girders 17 of the gantry crane to descend to the ground from among the box girders 17 of the gantry crane;
step9.2: the assembled hoisting trolley 19 is hoisted from the ground to penetrate through the box girder 17 of the gantry crane, so that the hoisting trolley is positioned above the box girder 17 of the gantry crane;
step9.3: then turning the trolley 19 by 90 degrees, aligning the travelling wheel box steel wheels of the trolley with the square steel of the track on the door box-shaped main beam 17, and falling on the track, thus completing the installation of the first trolley;
and Step9.3, repeating Step9.1 ~ Step9.3 to hoist the second hoisting trolley and finish the installation of the second hoisting trolley, thereby finishing the installation of the whole double-girder gantry crane 4.
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 (8)
1. Truss connection beam type door machine dismouting is put in the tunnel, its characterized in that: the tunnel excavation device comprises an artificial tunnel excavation section (2), an upstream tunnel expanding excavation section (3) is excavated behind the artificial tunnel excavation section (2), a tunnel expanding excavation heightening section (5) is excavated behind the upstream tunnel expanding excavation section (3), a downstream tunnel expanding excavation section (6) is excavated behind the tunnel expanding excavation heightening section (5), and a tunnel (7) is excavated by a tunneling machine behind the downstream tunnel expanding excavation section (6);
a gantry crane track (1) is laid at the bottoms of the manual tunnel excavation section (2), the upstream tunnel expanding excavation section (3), the tunnel expanding excavation heightening section (5) and the downstream tunnel expanding excavation section (6), and a double-girder gantry crane (4) is supported on the gantry crane track (1);
the double-main-beam gantry crane (4) comprises a traveling wheel box (8), a gantry crane bottom beam (9) is supported at the top of the traveling wheel box (8), a connecting beam (13) is installed between the tops of the gantry crane bottom beams (9) in a spanning mode, a stand column (12) is supported at two ends of the top of the connecting beam (13), a gantry crane main supporting leg (16) is installed on the stand column (12) in a supporting mode through a supporting leg upper end adjusting device (15), the bottom of the gantry crane main supporting leg (16) is fixed on the gantry crane bottom beam (9), a gantry crane main box main beam (17) is supported at the top of the gantry crane main supporting leg (16), the gantry crane box main beams (17) are fixedly connected with one another through a main beam connecting beam (18), and a crane trolley (19) is installed at the top of the gantry crane box main beam (17).
2. The device for mounting and dismounting the girder-linked door machine in the tunnel according to claim 1, wherein: the gantry crane track (1) is laid on a concrete track foundation (14), and the concrete track foundation (14) is poured at the bottom of an artificial tunnel excavation section (2), an upstream tunnel expanding excavation section (3), a tunnel expanding excavation heightening section (5) and a downstream tunnel expanding excavation section (6).
3. The device for mounting and dismounting the girder-linked door machine in the tunnel according to claim 1, wherein: and a rod piece (10) for temporarily fixing the connecting beam (13) and the gantry crane bottom beam (9) is arranged between the connecting beam and the gantry crane bottom beam.
4. The device for mounting and dismounting the girder-linked door machine in the tunnel according to claim 1, wherein: an upright post support rod (11) used for temporarily fixing the upright post (12) and the gantry crane bottom beam (9) is arranged between the upright post and the gantry crane bottom beam.
5. The device for mounting and dismounting the girder-linked door machine in the tunnel according to claim 1, wherein: the connecting beam (13) and the upright post (12) are assembled by adopting a plurality of standard truss structures.
6. The method for installing the gantry by adopting the device for installing the truss-linked beam type gantry in the tunnel as claimed in any one of claims 1 to 5 is characterized by comprising the following steps:
step 1: two gantry crane tracks (1) are laid at the bottoms of the manual tunnel excavation section (2), the upstream tunnel expanding excavation section (3), the tunnel expanding excavation heightening section (5) and the downstream tunnel expanding excavation section (6);
step 2: the method comprises the following steps that a travelling wheel box (8) is installed on a gantry crane track (1), and two gantry crane bottom beams (9) are respectively hoisted on the travelling wheel box (8) on the gantry crane track (1) by a truck crane;
step 3: after the two gantry crane bottom beams (9) are leveled, the gantry crane bottom beams (9) are temporarily fixed with the ground by using the rod pieces (10), then the assembled connecting beams (13) are hoisted and supported across the tops of the two gantry crane bottom beams (9), and the rod pieces (10) are adopted to temporarily fix the two gantry crane bottom beams and further form an integral structure;
step 4: the two upright posts (12) are respectively vertically hung at two end positions of a connecting beam (13) and temporarily fixed, and then the upright posts (12) and a bottom beam (9) of the gantry crane are temporarily fixed by adopting upright post stay bars (11);
step 5: dismantling a rod piece (10) temporarily fixed between a bottom beam (9) of the gantry crane and the ground to ensure that the travelling wheel box (8) can freely travel on the track (1) of the gantry crane;
step 6: hoisting a main landing leg (16-A) of a first portal crane to a proper height by using a truck crane according to a combined mode of a lifting rope and a chain hoist, manually pushing a bottom beam (9) of the portal crane into a proper position below a lifting point of the truck crane along a track (1) of the portal crane, operating the truck crane to hoist the main landing leg (16-A) of the first portal crane at the front end of the bottom beam (9) of the portal crane, aligning the lower end of the main landing leg (16-A) of the first portal crane with a flange of the bottom beam (9) of the portal crane, penetrating a bolt for screwing, and firmly connecting the upper end of the main landing leg (16-A) of the first portal crane with an upper end adjusting device (15) of a landing leg arranged at the upper end of an upright post (12) to finish the installation of the main landing leg (16-A);
step 7: the Step6 is repeated to sequentially complete the installation of a second gantry crane main supporting leg (16-B), a third gantry crane main supporting leg (16-C) and a fourth gantry crane main supporting leg (16-C); thereby completing the fixed installation of four main supporting legs of the double-main-beam gantry crane (4);
step 8: installing a box-shaped main beam (17) of the gantry crane;
step 9: the installation of the crane trolley (19) is carried out.
7. The method for installing the gantry in connection with the girder-type gantry installation and removal device in the tunnel of claim 6, wherein the specific operation steps in Step8 are as follows:
step8.1: two gantry crane bottom beams (9) provided with 4 gantry crane main supporting legs (16) are pushed to a downstream tunnel expanding excavation section (6) along a gantry crane rail (1) and are stopped stably at a proper position, and then a support pad is adopted for limiting between a travelling wheel box (8) and the gantry crane rail (1);
step8.2: the method comprises the following steps of (1) hoisting the original double-girder type portal crane (4) by a truck at the position where a portal crane main supporting leg (16) is installed, assembling portal crane box girders (17), and fixing the portal crane box girders (17) by girder connecting beams (18);
step8.3: after the assembly of the portal crane box-shaped main beam (17) is finished, the portal crane box-shaped main beam (17) is hoisted to the highest point of the tunnel expanding and excavating heightening section (5) by using a truck crane, and a portal crane bottom beam (9) parked at the downstream tunnel expanding and excavating section (6) is pushed to a position right below the upstream portal crane box-shaped main beam (17) to stop;
step8.4: 4 groups of persons stand respectively in front of the connecting flange of the main landing leg (16) of the portal crane and the main girder (17) of the portal crane, simultaneously align the flange hole of the box girder (17) of the portal crane and the flange hole of the main landing leg (16) of the portal crane, penetrate a connecting bolt, slowly hang the box girder (17) of the portal crane on the main landing leg (16) of the portal crane, and tighten the bolt to finish the installation of the box girder (17) of the portal crane and the main landing legs (16) of 4 portal cranes;
step8.5: and (4) removing the two upright columns (12) and the truss type connecting beam (13).
8. The method for installing the gantry in connection with the girder-type gantry installation and removal device in the tunnel of claim 6, wherein the specific operation steps in Step9 are as follows:
step9.1: after the box girders (17) of the gantry crane are installed, the small hooks of the truck crane are operated by utilizing the gaps among the box girders (17) of the gantry crane to descend to the ground from the space among the box girders (17) of the gantry crane;
step9.2: the assembled hoisting trolley (19) is hoisted from the ground to penetrate through the box girder (17) of the gantry crane, so that the hoisting trolley is positioned above the box girder (17) of the gantry crane;
step9.3: then the trolley (19) is rotated by 90 degrees, the travelling wheel box steel wheels of the trolley are aligned with the square steel of the track on the chassis-shaped main beam (17) of the trolley and fall on the track, and then the first trolley is installed;
and (5) Step9.3, repeating Step9.1 ~ Step9.3 to hoist the second hoisting trolley and finish the installation of the second hoisting trolley, thereby finishing the installation of the whole double-girder gantry crane (4).
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| CN102583162A (en) * | 2012-01-31 | 2012-07-18 | 西南交通大学 | Cross-shaped hoisting device for weight on table board of horizontal type test bed |
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| CN101249927A (en) * | 2007-08-30 | 2008-08-27 | 中铁大桥局集团第一工程有限公司 | Mounting and dismounting method for gantry crane |
| CN102139832B (en) * | 2011-04-06 | 2013-06-19 | 中国葛洲坝集团股份有限公司 | Gantry crane device with lengthways and transverse traveling functions and hoisting method |
| CN202829353U (en) * | 2012-09-04 | 2013-03-27 | 中国石油天然气集团公司 | Gantry crane used for pipeline construction in tunnel |
| CN106044576B (en) * | 2016-08-08 | 2017-10-17 | 中铁工程机械研究设计院有限公司 | A kind of rail row and wheel row combined type tunnel tracklaying crane and construction method |
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