CN109607384B - Turning-over method for cutter head of super-large-diameter shield tunneling machine - Google Patents
Turning-over method for cutter head of super-large-diameter shield tunneling machine Download PDFInfo
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- CN109607384B CN109607384B CN201910127597.9A CN201910127597A CN109607384B CN 109607384 B CN109607384 B CN 109607384B CN 201910127597 A CN201910127597 A CN 201910127597A CN 109607384 B CN109607384 B CN 109607384B
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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
- B66C13/00—Other constructional features or details
- B66C13/04—Auxiliary devices for controlling movements of suspended loads, or preventing cable slack
- B66C13/08—Auxiliary devices for controlling movements of suspended loads, or preventing cable slack for depositing loads in desired attitudes or positions
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Abstract
The invention discloses a turning method of a cutter head of an oversized-diameter shield tunneling machine, which adopts a movable crane, a gantry crane with a rack arranged on a foundation pit construction site, a plurality of annular steel wire ropes and a plurality of shackles, and comprises the following steps: firstly, moving a gantry crane and a crane to the ground beside a foundation pit, enabling a cutter head to be positioned between the crane and the gantry crane, and connecting a lifting point on the cutter head with a lifting hook of the gantry crane and a lifting hook of the crane through an annular steel wire rope and a shackle; and operating the gantry crane and the crane to operate in a matched manner, so that the cutter head turns over from a horizontal state to a vertical state. The turning method of the cutter head of the shield machine with the ultra-large diameter can safely and reliably realize the turning operation of the cutter head of the shield machine with the ultra-large diameter, and the gantry crane and the movable crane are adopted for cooperation operation, so that the gantry crane can be directly built above a foundation pit, the occupation of engineering machinery for turning the cutter head on a construction site is reduced, the construction site does not need to be expanded, and the construction cost is reduced.
Description
Technical Field
The invention relates to the technical field of shield tunneling machine assembly, in particular to a turning-over method of a cutter head of an ultra-large-diameter shield tunneling machine.
Background
The construction sites of a plurality of tunnels are located in crowded cities or remote mountains, such as urban subway tunnels, mountain-crossing railway tunnels and mountain-crossing highway tunnels, the construction sites of the tunnel projects are not wide enough or engineering equipment is difficult to reach the construction sites, which brings difficulty to some construction operations, for example, a shield machine cutterhead is in a horizontal state before being installed in a well, and the cutterhead needs to be installed in a vertical state in the well, so that the turning-over operation is needed before the cutterhead is put in the well, usually two crawler cranes are used for cooperating to turn over the cutterhead, however, under the condition that the construction sites are crowded, the construction sites are difficult to simultaneously accommodate the two crawler cranes, the weight of the cutterhead is larger, the size of the cutterhead is larger, the lifting capacity and the volume of the crawler crane for turning over are larger, for example, for the cutterhead of the shield machine with the super-large diameter of more than 500 tons, two crawler cranes with the height of, if the construction site is narrow and small, the two heavy crawler cranes are inconvenient to move, the operation safety factor is low, and the operation progress is slow.
Therefore, for the turnover operation of the cutter head of the shield tunneling machine with the ultra-large diameter, the construction site is required to be wide enough to facilitate the movement of the crawler crane, if the construction site is in an urban tunnel construction site, the urban road needs to be blocked in a large scale or a building needs to be disassembled to form the wide enough construction site, so that the interference is brought to the normal traffic of the urban road and the normal life of residents, and if the construction site and the road which is led into a deep mountain need to be expanded in the deep mountain tunnel engineering, so that the construction cost is increased in a large scale.
Based on the reasons, a method which is safe and reliable, can ensure the construction progress and can turn over the cutter head of the shield machine with the super-large diameter in the tunnel engineering with a more tense construction site is needed to be provided.
Disclosure of Invention
The invention aims to provide a turning method of a cutter head of an oversized-diameter shield tunneling machine, and solves the technical problem that the cutter head of the oversized-diameter shield tunneling machine is difficult to turn from a horizontal state to a vertical state during installation in the prior art.
In order to solve the technical problems, the invention adopts the following technical scheme:
the method adopts a movable crane, a gantry crane with a rack arranged on a foundation pit construction site and a rigging for binding the cutter head, and specifically comprises the following steps:
(1) binding a cutter head hoisting point:
(1.1) moving the gantry crane and the crane to the ground beside the foundation pit, so that the cutter head is positioned between the crane and the gantry crane;
(1.2) connecting a lifting point on the cutterhead, which is close to one side of the gantry crane, with a lifting hook of the gantry crane through an annular steel wire rope and a shackle, wherein the rated lifting load G1 of the gantry crane is greater than the weight G2 of the cutterhead, so that the gantry crane can independently lift the cutterhead;
(1.3) connecting a lifting point on the cutter head, which is close to one side of the crane, with a lifting hook of the crane through the annular steel wire rope and the shackle;
(2) turning over the cutter head: and operating the gantry crane and the crane to cooperate to complete the turning-over operation of the cutter head, so that the cutter head is turned over from a horizontal state to a vertical state.
Preferably, the step (2) specifically comprises:
(2.1) the lifting hook of the crane and the lifting hook of the gantry crane are lifted slowly at the same time, and the crane is matched with the gantry crane to lift the cutter head off the ground;
(2.2) the lifting hook of the crane is fixed, the lifting hook of the gantry crane is lifted slowly, and the cutter head is turned over to form an included angle A with the horizontal ground;
(2.3) slowly descending a lifting hook of the crane, and putting and supporting the corresponding side of the cutter head on the padded sleeper;
(2.4) the lifting hook of portal crane promotes slowly, adjusts simultaneously the portal crane to cutter head one side is drawn close slowly, until the cutter head is vertical state.
Preferably, one side of the cutter head is provided with at least one main lifting lug, the main lifting lug can bear the weight of the cutter head, and the side opposite to the main lifting lug is provided with at least one auxiliary lifting lug; in the step (1.1), the gantry crane is located on one side of the main lifting lug, and the crane is located on one side of the auxiliary lifting lug.
Preferably, the lifting hook on the gantry crane is a double-beam lifting hook, and in the step (1.2), the two lifting hooks of the gantry crane are respectively connected with the lifting point of the cutter head through a shackle and at least one annular steel wire rope.
Preferably, the hook on the crane is a double-beam hook, and in the step (1.3), the two hooks of the crane are respectively connected with the hanging point of the cutterhead through a shackle and at least one annular steel wire rope.
Preferably, the track for the gantry crane to walk passes through the welding assembly field where the cutterhead is located and the foundation pit, and before the step (1), the cutterhead located in the welding assembly field is translated to the side of the foundation pit through the gantry crane.
Preferably, in step (2.2), the included angle a is in the range of 60 to 70 °.
Preferably, after the cutterhead is turned over from a horizontal state to a vertical state, the gantry crane moves slowly to a position right above the foundation pit, and a lifting hook of the gantry crane descends slowly to enable the cutterhead to be installed in a well.
Preferably, the rated lifting capacity G1 of the gantry crane is more than or equal to 1.2G 2.
Preferably, the method is used for the construction occasion of the parallel double tunnels, the construction sites of the two tunnels are respectively paved with operation tracks corresponding to the gantry cranes, and a transverse moving track is paved between the two groups of operation tracks, so that the gantry cranes can move from one group of operation tracks to the other group of operation tracks through the transverse moving track, and are used for respectively hoisting and turning over cutter heads of the shield tunneling machines arranged in the two tunnels.
The invention has the beneficial technical effects that:
1. the turning-over method of the cutter head of the super-large-diameter shield machine provided by the invention adopts the cooperation of the gantry crane and the movable crane, and can safely and reliably realize the turning-over operation of the cutter head of the super-large-diameter shield machine.
2. The gantry crane can be directly built above the foundation pit, so that the occupation of the engineering machinery for turning the cutterhead to a construction site is reduced, the cutterhead turning method can be used for tunnel engineering with a nervous construction site, the construction site does not need to be expanded, and the construction cost is reduced.
3. When the turning method of the cutter head of the shield machine with the ultra-large diameter is used in the parallel double-tunnel engineering, the cutter head of the shield machine arranged in two tunnels can be turned by one gantry crane, so that the construction work of the gantry crane can be reduced once, the workload is reduced, and the construction progress is accelerated.
Drawings
FIG. 1 is a schematic structural diagram of a cutter head for turning over in an embodiment of a turning-over method of a cutter head of an oversized-diameter shield tunneling machine according to the invention;
FIG. 2 is a schematic diagram of a cutter head of an extra-large diameter shield tunneling machine just lifted in one embodiment of the turning-over method for the cutter head of the extra-large diameter shield tunneling machine;
FIG. 3 is a schematic diagram of a connection of a translation lifting lug with a double-beam lifting hook of a gantry crane through an annular steel wire rope and a shackle in an embodiment of the turning-over method of the cutter head of the super-large diameter shield tunneling machine;
FIG. 4 is a schematic diagram of a cutter head of an extra-large diameter shield tunneling machine during hoisting and turning for 46 degrees in one embodiment of the turning method for the cutter head of the extra-large diameter shield tunneling machine;
FIG. 5 is a schematic diagram of a cutter head of an extra-large diameter shield tunneling machine during hoisting and turning for 68 degrees in one embodiment of the turning method for the cutter head of the extra-large diameter shield tunneling machine;
FIG. 6 is a schematic diagram of a turning-over method of a cutter head of an ultra-large diameter shield tunneling machine according to an embodiment of the present invention, when the cutter head is lifted and turned over to a vertical state;
FIG. 7 is a schematic diagram of a construction site when the turnover method of the cutterhead of the super-large-diameter shield tunneling machine is used for turnover of side-by-side double-tunnel cutterheads in one embodiment of the invention;
FIG. 8 is a left side view of a gantry crane used in an embodiment of the turning method for the cutter head of the extra-large diameter shield tunneling machine according to the present invention;
fig. 9 is a front view of a gantry crane used in an embodiment of the turning method for the cutter head of the extra-large diameter shield tunneling machine according to the present invention.
In the drawings, each reference numeral means: the device comprises a cutter head 11, a first main block 111, a second main block 112, a third main block 113, a fourth main block 114, a fifth main block 115, a sixth main block 116, a translation lifting lug 117, a main lifting lug 118, an auxiliary lifting lug 119, a crane 12, a gantry crane 13, a double-beam lifting hook 131, an annular steel wire rope 141, a shackle 142, the ground 15, a left working rail 161, a left welding assembly site 162, a left foundation pit 163, a right working rail 171, a right welding assembly site 172 and a traverse rail 181.
Detailed Description
The following examples are intended to illustrate the present invention in detail and should not be construed as limiting the scope of the present invention in any way.
Example 1:
please refer to fig. 1 to fig. 6.
The turning method of the cutter head of the shield machine with the ultra-large diameter provided by the embodiment of the invention is used for turning the cutter head 11 of the shield machine shown in figure 1, wherein the cutter head 11 of the shield machine weighs more than 500 tons, consists of 1 central block, 6 main blocks and 6 auxiliary blocks, and is a part with the largest diameter and the heaviest weight during single hoisting in the assembly process of the shield machine. Because this blade disc 11 size is big, weight is big, and the whole inconvenient transportation of blade disc 11, consequently, with 1 piece of center block of blade disc 11, 6 main blocks, 6 assist the piece and directly accomplish in the welding assembly place adjacent the foundation ditch that is used for assembling the shield structure machine, later shift to near the foundation ditch, avoid long distance transport.
As shown in fig. 1, a plurality of lifting lugs are arranged on the cutter head 11, and these lifting lugs include four translation lifting lugs 117 arranged on the front faces of the second main block 112, the third main block 113, the fifth main block 115 and the sixth main block 116 of the cutter head 11, two main lifting lugs 118 arranged on the edge of the first main block 111, and two auxiliary lifting lugs 119 arranged on the edge of the fourth main block 114, where the translation lifting lugs 117 are used for binding when the cutter head 11 horizontally lifts and moves, and the main lifting lugs 118 and the auxiliary lifting lugs 119 are used for binding when the cutter head 11 turns over.
As shown in fig. 2, the turning method for the cutterhead of the shield machine with the ultra-large diameter provided by the embodiment of the invention adopts a crawler crane 12 and a gantry crane 13 to operate in a matching manner, and adopts a plurality of annular steel wire ropes and a plurality of rigging assemblies which are buckled off to bind the cutterhead 11 to the lifting hooks of the crane 12 and the gantry crane 13, wherein a track for the gantry crane 12 to travel passes through a welding assembly field and a foundation pit where the cutterhead 11 is located, the lifting hooks on the crane 12 and the gantry crane 13 are both double-beam lifting hooks, and the main arm of the crane 12 is 30 meters long.
The two main lifting lugs 118 can bear the weight of the cutterhead 11, and the rated lifting capacity G1 of the gantry crane 13 is 650 tons, which is larger than the weight G2 of the cutterhead 11, so that the gantry crane 13 can lift the cutterhead 11 in a vertical state through the two main lifting lugs 118.
The turning method for the cutter head of the shield tunneling machine with the ultra-large diameter provided by the embodiment of the invention specifically comprises the following steps:
(1) and (3) translating the cutter head 11 positioned in the welding assembly field to the side of the foundation pit through a gantry crane 13.
In this step, firstly, the translational lifting lugs 117 of the cutter head 11 are connected with the double-beam lifting hook of the gantry crane 13 through the annular steel wire rope and the shackles, as shown in fig. 3, an annular steel wire rope 141 with a diameter of 120mm × 12m passes through each translational lifting lug 117, two ends of the annular steel wire rope 141 are sleeved on the shackles 142, and the shackles 142 are hung on the translational lifting lugs 117 of the cutter head 11.
The annular steel wire rope 141 connected with the translational lifting lugs 117 on the second main block 112 and the third main block 113 adopts a shackle with the rated lifting capacity of 200 tons, the annular steel wire rope 141 connected with the translational lifting lugs 117 on the fifth main block 115 and the sixth main block 116 adopts a shackle with the rated lifting capacity of 150 tons, and the lifting hook on each side of the double-beam lifting hook 131 is respectively provided with a shackle with the rated lifting capacity of 150 tons and a shackle with the rated lifting capacity of 200 tons.
After binding is finished, the gantry crane 13 lifts the cutter head 11 to be 1m away from the ground, then the cutter head 11 is lifted to be slowly translated to the ground 2m away from the foundation pit, and then the cutter head 11 is placed above the sleeper.
(2) Binding a tool disc hanging point before turning over:
(2.1) moving the gantry crane 13 and the crane 12 to the ground 15 beside the foundation pit, so that the cutterhead 11 is positioned between the crane 12 and the gantry crane 13, at the moment, the gantry crane 13 is positioned on one side of a main lifting lug 118 of the cutterhead 11, the crane 12 is positioned on one side of an auxiliary lifting lug 119, and the main force arm of the crane 12 is adjusted to form an included angle of 65 degrees with the ground.
(2.2) connecting the main lifting lug 118 of the cutter head 11 with the lifting hook of the gantry crane 13 through an annular steel wire rope and a shackle, wherein the gantry crane 13 is hung on the main lifting lug 118 of the cutter head 11 through 2 annular steel wire ropes with the diameter of 120mm and the lifting height of × 12m and 2 shackles with the rated lifting capacity of 400 tons, each main lifting lug 118 penetrates through one annular steel wire rope, and each annular steel wire rope is hung on two lifting hooks of the gantry crane 13 through one shackle.
(2.3) connecting the auxiliary lifting lugs 119 on the cutter head 11 with the lifting hook of the crane 12 through annular steel wire ropes and shackles, wherein in the step, 4 annular steel wire ropes with the diameter of 90mm 8612 m and 2 shackles with the rated lifting capacity of 200 tons are used together, wherein each auxiliary lifting lug 119 penetrates through two annular steel wire ropes with the diameter of 90mm × 12m, and the two annular steel wire ropes with the diameter of 90mm × m on each auxiliary lifting lug 119 are hung on one lifting hook of the gantry crane 13 through one shackle with the rated lifting capacity of 200 tons.
And finishing binding the cutterhead hoisting points before turning over.
(3) Turning over the cutter head: and operating the gantry crane 13 and the crane 12 to cooperate to complete the turning operation of the cutter head 11, so that the cutter head 11 is turned from a horizontal state to a vertical state. The step (3) specifically comprises the following steps:
(3.1) firstly, as shown in fig. 2, the hook of the crane 12 and the hook of the gantry crane 13 are lifted slowly at the same time, and the crane 12 is matched with the gantry crane 13 to lift the cutter head 11 off the ground;
(3.2) as shown in fig. 4, after the cutterhead 11 is lifted 1m from the ground, the hook of the crane 12 is not moved, the hook of the gantry crane 13 is lifted slowly, and simultaneously, the crane 12 is drawn close to the gantry crane 13 slowly, so that the cutterhead 11 is inclined gradually in the air.
(3.3) turning over the cutter head 11 to form an included angle of 65 degrees with the horizontal ground, slowly descending a lifting hook of the crane 12, and putting and supporting the corresponding side of the cutter head 11 on a sleeper;
(3.4) as shown in fig. 5, after the cutterhead 11 is placed down on one side of the crane 12 and supported on the sleeper, the lifting force is not exerted by the hook of the crane 12, the hook of the gantry crane 13 is lifted slowly, and the gantry crane 13 is adjusted to be drawn close to one side of the cutterhead 11 slowly until the cutterhead 11 is in the vertical state shown in fig. 6.
And finally, after the cutter head 11 is turned over from the horizontal state to the vertical state, the gantry crane 13 slowly moves to the position right above the foundation pit, and a lifting hook of the gantry crane 13 slowly descends to enable the cutter head 11 to be installed in the pit.
Example 2
Please refer to fig. 7 to fig. 9.
The turning method of the cutter head of the shield machine with the ultra-large diameter provided by the embodiment of the invention is used for the construction occasion of two parallel tunnels, two tunnels are constructed through one shield machine respectively, the construction sites where the two tunnels are located are respectively paved with the operation tracks corresponding to the gantry crane, and the transverse moving track is paved between the two groups of operation tracks, so that the gantry crane can move from one group of operation tracks to the other group of operation tracks through the transverse moving track, and the cutter head of the shield machine arranged in the two tunnels is lifted and turned over respectively.
Specifically, as shown in fig. 7, a left operation rail 161 is laid on the construction site where the left tunnel is located, and the left operation rail 161 passes through a left welding assembly site 162 for assembling a cutterhead and a left foundation pit 163 for assembling a shield machine on the construction site where the left tunnel is located, so that the gantry crane 13 can translate the cutterhead from the left welding assembly site 162 to the vicinity of the left foundation pit 163; a right operation track 171 is laid on the construction site where the right tunnel is located, and the right operation track 171 passes through a right welding assembly site 172 for assembling a cutterhead and a right foundation pit 173 for assembling a shield machine on the construction site where the right tunnel is located, so that the gantry crane 13 can enable the cutterhead to be translated to the vicinity of the right foundation pit 173 from the right welding assembly site 172; a traverse rail 181 is laid between the left work rail 161 and the right work rail 171.
As shown in fig. 8 and 9, the gantry crane 13 has four support columns, each support column has a set of eight traveling wheels below it, and the gantry crane 13 has four sets of thirty-two traveling wheels, wherein sixteen traveling wheels at the bottom of the same support column travel on the same track, that is, the traveling wheels at the bottom of the two left support columns are located on the same track, the traveling wheels at the bottom of the two right support columns are located on the same track, when the gantry crane travels longitudinally, the traveling wheels pass through two rails, and the track pitches of the two rails on the left operation track 161 and the right operation track 171 correspond to the track pitches of the two rails.
The traveling wheels at the bottom of the gantry crane 13 can rotate 90 degrees, when the gantry crane 13 turns over the cutterhead in the tunnel on the left side, the gantry crane 13 moves to the joint of the traverse rail 181 and the left operation rail 161, and the traveling wheels at the bottom of the gantry crane 13 rotate 90 degrees, so that the directions of the traveling wheels are consistent with the direction of the traverse rail 181 and travel to the right operation rail 171 through the traverse rail 181, and the traveling wheels are used for turning over the cutterhead installed in the tunnel on the right side.
The cross sliding track 181 is provided with four rails, after all the traveling wheels at the bottom of the gantry crane 13 rotate 90 degrees, the distance between the steered traveling wheels is consistent with the track pitch of the four rails of the cross sliding track 181, the traveling wheels at the bottom of two supporting columns at each side occupy two rails, four groups of wheels on the four rails of the cross sliding track 181 are synchronously pulled by a chain block, the gantry crane 13 can be slowly moved to the operation track at the right side, and when the gantry crane 13 moves to the operation track at the right side, all the traveling wheels rotate 90 degrees again to complete track change.
While the present invention has been described in detail with reference to the drawings and the embodiments, those skilled in the art will understand that various specific parameters in the above embodiments can be changed without departing from the spirit of the present invention, and a plurality of specific embodiments are formed, which are common variation ranges of the present invention, and will not be described in detail herein.
Claims (10)
1. A turning method for a cutter head of a shield machine with an oversized diameter is characterized in that a movable crane, a gantry crane with a rack arranged on a foundation pit construction site and a rigging for binding the cutter head are adopted, and the method specifically comprises the following steps:
(1) binding a cutter head hoisting point:
(1.1) moving the gantry crane and the crane to the ground beside the foundation pit, so that the cutter head is positioned between the crane and the gantry crane;
(1.2) connecting a lifting point on the cutterhead, which is close to one side of the gantry crane, with a lifting hook of the gantry crane through an annular steel wire rope and a shackle, wherein the rated lifting load G1 of the gantry crane is greater than the weight G2 of the cutterhead, so that the gantry crane can independently lift the cutterhead;
(1.3) connecting a lifting point on the cutter head, which is close to one side of the crane, with a lifting hook of the crane through the annular steel wire rope and the shackle;
(2) turning over the cutter head: operating the gantry crane and the crane to cooperate to complete the turning-over operation of the cutter head, so that the cutter head is turned over from a horizontal state to a vertical state;
in the step, the cutter head is composed of 1 central block, 6 main blocks and 6 auxiliary blocks, the 6 main blocks and the 6 auxiliary blocks are directly spliced and welded at a welding assembly field near a foundation pit for assembling the shield tunneling machine, and then the cutter head is transferred to the position near the foundation pit; be equipped with a plurality of lugs that are used for lifting by crane on the blade disc, the lug is including being in respectively four translation lugs that openly set up of the fifth main piece, the sixth main piece of second main piece, the third main piece and the front side of blade disc rear side, two main lugs that set up at the edge of the first main piece on right side to and two supplementary lugs that set up at the edge of left fourth main piece, the translation lug is used for bind when the blade disc level lifts by crane the removal, main lug and supplementary lug are used for bind when the blade disc stands up.
2. The turning method for the cutter head of the shield tunneling machine with the ultra-large diameter according to claim 1, wherein the step (2) specifically comprises the following steps:
(2.1) the lifting hook of the crane and the lifting hook of the gantry crane are lifted slowly at the same time, and the crane is matched with the gantry crane to lift the cutter head off the ground;
(2.2) the lifting hook of the crane is fixed, the lifting hook of the gantry crane is lifted slowly, and the cutter head is turned over to form an included angle A with the horizontal ground;
(2.3) slowly descending a lifting hook of the crane, and putting and supporting the corresponding side of the cutter head on the padded sleeper;
(2.4) the lifting hook of portal crane promotes slowly, adjusts simultaneously the portal crane to cutter head one side is drawn close slowly, until the cutter head is vertical state.
3. The turning-over method of the cutter head of the shield tunneling machine with the ultra-large diameter according to claim 1, wherein at least one main lifting lug is arranged on one side of the cutter head, the main lifting lug can bear the weight of the cutter head, and at least one auxiliary lifting lug is arranged on the side opposite to the main lifting lug; in the step (1.1), the gantry crane is located on one side of the main lifting lug, and the crane is located on one side of the auxiliary lifting lug.
4. The turning-over method for the cutter head of the shield tunneling machine with the ultra-large diameter according to claim 1, wherein the lifting hooks on the gantry crane are double-beam lifting hooks, and in the step (1.2), the two lifting hooks of the gantry crane are respectively connected with the lifting points of the cutter head through a shackle and at least one annular steel wire rope.
5. The turning-over method of the cutter head of the shield tunneling machine with the ultra-large diameter according to claim 1, wherein the lifting hook of the crane is a double-beam lifting hook, and in the step (1.3), the two lifting hooks of the crane are respectively connected with the lifting point of the cutter head through a shackle and at least one annular steel wire rope.
6. The turning method for the cutterhead of the shield tunneling machine with the ultra-large diameter according to claim 1, wherein a track for the gantry crane to travel passes through a welding assembly field where the cutterhead is located and the foundation pit, and before the step (1), the cutterhead located in the welding assembly field is translated to the side of the foundation pit through the gantry crane.
7. The method for turning over the cutterhead of the extra-large diameter shield tunneling machine according to claim 2, wherein in step (2.2), the included angle a is in the range of 60-70 °.
8. The turning method for the cutter head of the shield tunneling machine with the ultra-large diameter according to claim 1, wherein after the cutter head is turned from a horizontal state to a vertical state, the gantry crane moves slowly to a position right above the foundation pit, and a lifting hook of the gantry crane descends slowly to enable the cutter head to be installed in a well.
9. The turning method for the cutter head of the extra-large diameter shield tunneling machine according to claim 1, wherein the rated lifting capacity G1 of the gantry crane is greater than or equal to 1.2G 2.
10. The method of claim 1, wherein the method is used in a construction site with two side-by-side tunnels, the construction site of each of the two tunnels is respectively provided with an operation track corresponding to the gantry crane, and a traverse rail is arranged between the two sets of operation tracks, so that the gantry crane can travel from one set of operation tracks to the other set of operation tracks through the traverse rails, and the method is used for respectively lifting and turning over the cutterheads of the shield tunneling machines installed in the two tunnels.
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| CN117188224B (en) * | 2023-08-22 | 2024-03-08 | 中铁十一局集团有限公司 | Recyclable track beam and construction method thereof |
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| CN104192732B (en) * | 2014-08-20 | 2016-08-24 | 徐工集团工程机械股份有限公司 | The crawler crane of a kind of energy double hook lifting and construction design method |
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