CN218293602U - Demolish frock to shield earlier and expand tunnel segment of digging - Google Patents
Demolish frock to shield earlier and expand tunnel segment of digging Download PDFInfo
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- CN218293602U CN218293602U CN202222347447.9U CN202222347447U CN218293602U CN 218293602 U CN218293602 U CN 218293602U CN 202222347447 U CN202222347447 U CN 202222347447U CN 218293602 U CN218293602 U CN 218293602U
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Abstract
The utility model discloses a to shield earlier and expand tunnel segment's dismantlement frock behind the shield for demolish the section of jurisdiction, relate to shield structure construction technical field. The duct piece is formed by splicing a top sealing block, a first adjacent block, a second adjacent block, a first standard block, a second standard block and a third standard block; rock soil is filled in the pipe piece, the dismantling tool comprises a plurality of groups of supporting plate assemblies and inclined struts, and the supporting plate assemblies are arranged between the rock soil surface and the third standard blocks along the tunnel direction; the diagonal brace is disposed between the first standard block and the third standard block along a tunnel direction. The support plate component and the inclined strut in the dismantling tool can play a role in supporting; the third standard block and the first standard block are prevented from being folded towards the inside of the tunnel under the action of gravity to generate safety risk after the capping block, the first abutting block and the second abutting block are detached.
Description
Technical Field
The utility model relates to a shield constructs construction technical field, especially relates to a to shield earlier and expand removing frock of digging tunnel section of jurisdiction afterwards.
Background
In the process of building the subway, in order to reduce the influence of the progress of the urban subway station on the construction progress of the shield zone, the shield zone mostly adopts a construction method of first tunneling and then station. In the construction process, a shield machine is generally adopted to construct the subway, and shield segments are main assembly members for shield construction, are innermost barriers of the tunnel and play a role in resisting soil layer pressure, underground water pressure and some special loads. The shield segments are usually made of high-strength impervious concrete, and a plurality of shield segments are assembled into a ring shape in a lining assembly mode.
After the shield construction, the segment structure of shield tunnel need be demolishd, segment structure is from great, and the hole inner space is narrow and small, and the segment is demolishd the construction risk and is the biggest, and present domestic and foreign segment is demolishd and often takes the mode of setting up platform and steel shotcrete, adopts non-mechanized mode to demolish the segment, demolishs the segment like big gun machine abolishes, water bores, impact drill abolishes etc. still need be equipped with demolishment tools such as hydraulic wrench, water bores, impact drill, bore iron and carry out the demolishment that the segment was beaten.
The Chinese patent with the patent number of CN202110041471.7 discloses a construction method for dismantling a shield through a pipe piece in a subsurface tunnel in advance, a proper radial load is applied to the pipe piece to be dismantled through a hydraulic support system, steel rings are erected on 2 ring pipe pieces in each of the two sides of an interval tunnel and on two sides of an air duct, steel sections among the steel rings are tensioned, a movable steel support is erected on the pipe piece to be dismantled, the pipe piece is dismantled in sequence, and the construction work of dismantling the existing shield pipe piece in the subway subsurface tunnel construction process under the complex working condition can be completed according to time, quality and safety and quickly. However, the duct piece structure of the dismantling method is heavy in self weight, the space in the tunnel is narrow, and the dismantling risk is large.
Chinese patent No. CN202010968004.4 discloses a tunnel-first post-station underground excavation station segment dismantling construction method and a segment dismantling tool used by the same, which includes the following steps: full-ring grouting of duct pieces at the interface positions; reinforcing the duct piece at the interface position; and after the earthwork at the top of the tunnel is dug, removing the duct piece at the interface position by using a duct piece removing tool. The used duct piece dismantling tool comprises a support frame, a duct piece assembling machine and an assembling machine power system. The utility model discloses a section of jurisdiction is demolishd the frock and need not to destroy the section of jurisdiction, unloads the section of jurisdiction bolt after, slowly demolishs through the mounting plate to the section of jurisdiction dolly is demolishd the section of jurisdiction in proper order and can not cause the section of jurisdiction damaged, thereby has avoided the damage to the section of jurisdiction. According to the method for removing the duct piece, double-liquid slurry needs to be additionally filled in the outer side of the duct piece, so that resource waste is caused, grouting pressure and grouting amount need to be strictly controlled in the grouting process, the duct piece is prevented from being staggered and damaged, otherwise follow-up disassembly is influenced, certain limitation is caused to removal work, and removal efficiency is reduced. In addition, because of the section of jurisdiction structure is from great, the space in the hole is narrow and small, if additionally increase mounting plate and section of jurisdiction dolly again, cause the workspace crowded, have great risk.
Chinese patent No. CN202011622973.0 discloses a method for dismantling a pipe piece in a steel ring of a shield tunnel portal, which comprises the steps of drilling a hole at the joint of the pipe piece by a rhinestone, then installing a hydraulic jack in the hole, and separating the pipe piece from a soil body by using the jack; and after the whole ring of pipe segments are pulled down by 2 10T hoists, the removed pipe segments are lifted away by a crane, so that the problem that the pipe segments in the steel ring at the opening can not be directly removed by the crane or the crane needs a large-tonnage crane is solved, the construction steps are simplified, the construction difficulty is reduced, the construction cost is saved, and the operation process is simple and convenient.
In the dismounting process, the self weight of the duct piece structure is large, large deformation is easily generated under the action of gravity when the duct piece is dismounted, the excavator cannot uniformly apply pressure, the dismounting work of the duct piece is hindered, the dismounting efficiency is influenced, and construction risks are brought; meanwhile, in the process of dismantling, the digging machine is required to be used for pressing and propping the duct piece, and the duct piece bolt is loosened and dismantled, so that the duct pieces are in a movable state, the stability is reduced, the duct piece structure can be completely supported by the digging machine, the falling or falling is avoided, and safety accidents are easily caused.
Therefore, a construction tool is needed, which is convenient for safely and effectively dismantling the shield segments in the construction process of the underground excavation channel under the complex working condition.
SUMMERY OF THE UTILITY MODEL
In order to overcome the not enough of above-mentioned prior art, the utility model provides a to shield earlier and expand the frock of demolising of digging tunnel section of jurisdiction afterwards.
The utility model adopts the technical proposal that:
a dismantling tool for tunnel segments subjected to shield tunneling and expanding excavation is used for dismantling the segments, wherein the segments are formed by splicing a top sealing block, a first adjacent block, a second adjacent block, a first standard block, a second standard block and a third standard block; rock soil is filled in the pipe piece.
The dismantling tool comprises a plurality of groups of supporting plate assemblies and inclined struts, wherein the supporting plate assemblies are arranged between the rock-soil surface and the third standard block along the tunnel direction; the diagonal brace is disposed between the first standard block and the third standard block along a tunnel direction.
Preferably, a plurality of segment bolt hole grooves are uniformly distributed on the first standard block and the third standard block. And the duct piece bolt hole grooves on the first standard block and the third standard block are in one-to-one correspondence and consistent in quantity.
Preferably, the configuration of the backup plate assembly is: the rock and soil surface sets up the backup pad, the backup pad upper surface is equipped with the top and holds in the palm, install the steel pipe on holding in the palm in the top, the end of steel pipe is fixed on the third standard block. The steel pipe is fixed between the rock soil and the third standard block, plays a supporting role, and can extrude the steel pipe to generate abnormal motion when the third standard block deforms, and the steel pipe is fixed on the supporting plate on the surface of the rock soil, so that the steel pipe is prevented from moving, and the deformation of the third standard block is further relieved.
Preferably, the tail end of the steel pipe is clamped in the segment bolt hole groove of the third standard block. The segment bolt hole groove is a self-contained structure for adjusting the assembly size, the segment bolt hole groove is used for clamping a steel pipe, the space can be fully utilized, and the use of workpieces is reduced.
Preferably, a plurality of groups of square timber pipe pieces are correspondingly fixed on the third standard block, and the tail end of the steel pipe on each group of the support plate component is abutted against the corresponding square timber pipe piece.
Preferably, a cross brace is arranged between the adjacent steel pipes. The cross braces are arranged between the steel pipes, so that the bending moment of the steel pipes can be reduced, and the supporting force is enhanced.
Preferably, the two ends of the inclined strut are respectively clamped in the segment bolt hole grooves on the first standard block and the third standard block.
Preferably, the inclined struts are parallel to each other, and the distance between the adjacent inclined struts is 50 cm.
Preferably, the supporting plate assemblies and the inclined struts are alternately arranged inside the pipe piece.
Preferably, a hanging ring is pre-embedded in the first adjacent block and the second adjacent block or a primary support protective layer outside the first adjacent block and the second adjacent block is removed and then the hanging ring is welded.
Preferably, the hanging ring is arranged at 1/4 position of two ends of the first abutting block and the second abutting block.
Preferably, a traction rope is fixed on the hoisting ring and is tensioned through a hand hoist arranged on the primary support structure;
compared with the prior art, the beneficial effects of the utility model are that:
1. the utility model provides a to shield earlier and expand demolising frock of digging tunnel segment afterwards, dig the ground of removing the third standard block peripheral scope below demolising to set up multiunit backup pad subassembly along the tunnel direction between ground surface and the third standard block, the backup pad subassembly has played the effect of supporting the third standard block, and set up a plurality of bracing between first standard block and the third standard block along the tunnel direction, the bracing also can play the supporting role; and the third standard block and the first standard block are prevented from being folded towards the inside of the tunnel under the action of gravity to generate safety risk after the capping block, the first abutting block and the second abutting block are removed.
2. In the dismantling process, the size of the excavator is smaller than the size of the third standard block, when the excavator boosts the middle of the third standard block, the third standard block deforms with the surrounding environment, the two ends of the third standard block apply extrusion force to the inclined strut and the support plate assembly, and the other ends of the inclined strut and the support plate assembly are respectively fixed on the first standard block and solid backfill rock soil, so that reaction force is synchronously applied to the inclined strut and the support plate assembly, the third standard block is prevented from being continuously extruded, the deformation of the third standard block is ensured to be in a smaller range, the third standard block cannot suddenly drop or fall, and the construction safety is ensured.
Drawings
Fig. 1 is a schematic view of a segment and a lifting ring in a dismantling tool for a shield-first and a tunnel-expanding-second tunnel segment provided by the utility model;
fig. 2 is a schematic view of the tunnel segment dismantling tool provided by the utility model, which comprises a shield and a tunnel expanding and excavating unit;
fig. 3 is a schematic flow chart of a method for removing tunnel segments by shield tunneling and expanding excavation according to the present invention;
reference numerals:
1-capping a top block; 2-a first abutment block; 3-a second abutment block; 4-a third standard block; 5-a second standard block;
6-first standard block; 7-rock soil; 8-primary branch structure; 9-a traction rope; 10-a hand-operated hoist; 11-a support plate;
12-a steel pipe; 13-diagonal bracing; and 14-digging machine.
Detailed Description
In order to make the purpose and technical solution of the embodiments of the present invention clearer, the embodiments of the present invention will be combined with the following, which is to clearly and completely describe the technical solution of the present invention.
In the description of the present application, it is to be understood that the terms "length," "upper," "lower," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the figures, which are based on the orientation or positional relationship shown in the figures, and are used for convenience in describing the present application and for simplicity in description, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore should not be construed as limiting the present application.
Example one
As shown in fig. 1-3, the utility model provides a to shield earlier and expand demolising frock of digging tunnel section of jurisdiction afterwards, wherein the section of jurisdiction is formed by capping piece 1, first adjacent block 2, second adjacent block 3, first standard block 6, second standard block 5 and the 4 concatenations of third standard block, be filled with ground 7 in the section of jurisdiction. The purpose of filling the rock soil 7 is to facilitate construction and to facilitate subsequent mounting and dismounting of the tool.
Hanging rings are arranged on the first adjacent block 2 and the second adjacent block 3, and a primary support structure 8 around the pipe piece is reinforced by grouting; the rings can be arranged in the following two modes: 1. the hanging rings are embedded in the first adjacent block 2 and the second adjacent block 3; 2. and clearing the primary protective layer and the concrete protective layer outside the first adjacent block 2 and the second adjacent block 3, and then welding the lifting rings at 1/4 positions at two ends of the first adjacent block 2 and the second adjacent block 3, namely welding the lifting rings at two ends of the first adjacent block 2 respectively, wherein the distance from the lifting rings to the edge position is 1/4 of the whole arc length of the first adjacent block 2, welding the lifting rings at two ends of the second adjacent block 3 respectively, and the distance from the lifting rings to the edge position is 1/4 of the whole arc length of the second adjacent block 3.
Removing the top sealing block 1; removing the first and second abutting blocks 2 and 3; and after excavating the rock soil 7 in the peripheral range of the third standard block 4, mounting and dismounting the tool.
The dismantling tool comprises a plurality of groups of supporting plate assemblies and inclined struts, wherein the supporting plate assemblies are arranged between the rock-soil surface and the third standard block along the tunnel direction; the diagonal brace is disposed between the first standard block and the third standard block along a tunnel direction.
And a plurality of segment bolt hole grooves are uniformly distributed on the first standard block and the third standard block. And the duct piece bolt hole grooves on the first standard block and the third standard block are in one-to-one correspondence and consistent in quantity. Excavating rock soil 7 in the peripheral range of the third standard block 4, and arranging the rock soil 7 into a relatively flat surface along the diameter direction, wherein the inner surface of the third standard block 4 is completely exposed; at this moment, because of the third standard block 4 is heavier, the tunnel is easily folded under the action of gravity after the support of rock soil 7 is lacked, and meanwhile, in the process of dismantling, after the pipe piece bolt is dismantled, the stability of the third standard block 4 is reduced, and the falling is easily and suddenly caused, so that the great safety risk is caused, and therefore, the support plate assembly and the inclined strut 13 are added for supporting.
The construction of the backup plate assembly is: the rock and soil surface sets up the backup pad, the backup pad upper surface is equipped with the top and holds in the palm, install the steel pipe on the top holds in the palm, the end of steel pipe is fixed on the third standard block. The steel pipe is fixed between the rock soil and the third standard block, plays a supporting role, and can extrude the steel pipe to generate abnormal motion when the third standard block deforms, and the steel pipe is fixed on the supporting plate on the surface of the rock soil, so that the steel pipe is prevented from moving, and the deformation of the third standard block is further relieved.
The tail end of the steel pipe 12 is clamped in the segment bolt hole groove of the third standard block 4. The segment bolt hole groove is a self-contained structure for adjusting the assembly size, the segment bolt hole groove is used for clamping the steel pipe 12, the space can be fully utilized, and the use of workpieces is reduced. And a cross brace is arranged between the adjacent steel pipes 12. The cross braces arranged between the steel pipes 12 can reduce the bending moment of the steel pipes 12 and enhance the supporting force.
The supporting plate assemblies and the inclined struts 13 are alternately arranged inside the duct piece. And the two ends of the inclined strut 13 are respectively clamped in the segment bolt hole grooves on the first standard block 6 and the third standard block 4. The inclined struts 13 are parallel to each other, and the distance between the adjacent inclined struts 13 is 50 cm. The supporting plate component plays a role in supporting the third standard block 4, a plurality of inclined struts 13 are arranged between the first standard block 6 and the third standard block 4 along the tunnel direction, and the inclined struts 13 can also play a supporting role.
Aiming at the duct piece of the tunnel which is firstly shield and then expanded and excavated, the specific dismantling method comprises the following steps in the dismantling process:
s1, arranging lifting rings on a first adjacent block 2 and a second adjacent block 3, and grouting to reinforce a primary support structure 8 around the duct piece; in order to increase the frictional resistance between the duct piece and the ground layer and ensure the compactness of the duct piece wall, secondary reinforcing grouting is needed. Firstly, the grouting perforated pipes are driven into the pre-buried grouting holes of the duct pieces, and then cement slurry is injected through the grouting perforated pipes in a pressing mode.
S2, backfilling rock soil 7 in the segment; the purpose of filling the rock soil 7 is to facilitate construction and subsequent installation and removal of the tool;
s3, removing the top sealing block 1;
the method for removing the top sealing block 1 is a water drilling core wire saw method or a direct removing method of the excavator 14. Wherein the wire saw method is a common method, namely cutting by using a steel wire rope or a diamond wire saw; cutting lines are marked on the capping block 1, then the upper half part of the capping block 1 to be cut is drilled by a water drill, and a hanger and a steel wire rope are installed. Then, installing a rope saw to cut off the top sealing block 1 along the cutting line, and finally, hanging off the cut top sealing block 1 by using a gantry crane to finish the dismantling of the top sealing block 1; or may be removed directly using excavator 14.
S4, removing the first adjacent block 2 and the second adjacent block 3; the first adjacent block 2 and the second adjacent block 3 are respectively spliced on two sides of the top sealing block 1, and the specific dismantling method comprises the following steps:
as shown in fig. 2, a hauling cable 9 is fixed on the hoisting rings at the two ends of the first abutting block 2 and the second abutting block 3, the hauling cable 9 is generally selected from a steel wire rope, and the hauling cable 9 is tensioned by a manual hoist 10 arranged on the primary support structure 8; the excavator 14 supports the first adjacent block 2 and the second adjacent block 3 respectively and pressurizes the first adjacent block and the second adjacent block 3, then connecting bolts on the first adjacent block 2 and the second adjacent block 3 are sequentially removed by an operator according to a longitudinal and annular removing sequence, the excavator 14 is matched with the first adjacent block 2 and the second adjacent block 3 to slowly descend, and finally the excavator is loaded to be transferred.
S5, excavating rock soil 7 in the peripheral range of the third standard block 4, arranging a plurality of groups of supporting plate assemblies between the surface of the rock soil 7 and the third standard block 4 along the tunnel direction, and arranging a plurality of inclined struts 13 between the first standard block 6 and the third standard block 4 along the tunnel direction;
s6, removing the first standard block 6, the second standard block 5 and the third standard block 4; the specific dismantling method comprises the following steps:
and (3) pressurizing the excavator 14 to respectively support the first standard block 6, the second standard block 5 and the third standard block 4, removing the connecting bolts, maintaining the current pressure of the excavator 14, removing the inclined strut 13, slowly decompressing the excavator 14, and pulling out the first standard block 6, the second standard block 5 and the third standard block 4.
In the process of dismantling, because dig 14 size and be less than first standard block 6, second standard block 5 and the size of third standard block 4, when digging 14 and carry out the pressure boost to this third standard block 4 middle part, third standard block 4 takes place to warp with ambient environment, if there is not the support, then can lead to third standard block 4 to fold to tunnel inside under the effect of gravity, has great safety risk, the utility model provides a bracing 13 and backup pad subassembly, third standard block 4 both ends exert the extruded force to bracing 13 and backup pad subassembly, because bracing 13 and the backup pad subassembly other end are fixed respectively on first standard block 6 and solid ground 7, consequently exerted the reaction force to bracing 13 and backup pad subassembly in step, prevent that third standard block 4 from continuing to extrude, guarantee that third standard block 4 deflection is in a less scope, and can not take place the circumstances of suddenly descending or falling, guaranteed the security of construction.
S7, the removed capping block 1, the first adjacent block 2, the second adjacent block 3, the first standard block 6, the second standard block 5 and the third standard block 4 are dispatched and transported. And finally, the removed segment parts are delivered to the transverse channel through a digging machine 14, the digging machine 14 is lifted into the muck truck and delivered to the vertical shaft, and the segment parts are lifted to the field muck yard by a crown block.
In the traditional dismantling process, in order to prevent the first standard block 6, the second standard block 5 and the third standard block 4 from being folded into the tunnel under the action of gravity to cause danger, the first standard block 6, the second standard block 5 and the third standard block 4 are tensioned by adopting a steel wire rope in advance, the steel wire rope penetrates through a segment grouting hole to be fixed on a well wall, the steel wire rope is in a tensioning state, and then segment bolts are dismantled in sequence by operating personnel. Finally, slowly hoisting the pipe piece, and placing the pipe piece to the ground in a shoe-shaped manner. But the steel wire is used for remaining support and installation, and certain safety risk is also caused when the steel wire is hoisted.
The utility model provides a shield constructs section of jurisdiction and demolishs frock, the supporting plate subassembly with 13 simple structures of bracing, the safety of being convenient for, and have better effect, improve the security of demolising in the work progress.
Example two
The second embodiment is similar to the first embodiment in technical solution, and differs from the first embodiment in that:
in the supporting plate component, a plurality of groups of square wood pipe pieces are correspondingly fixed on the third standard block 4, jacking supports are correspondingly arranged on the square wood pipe pieces, and the tail ends of the steel pipes 12 on each group of the supporting plate component are abutted against the corresponding jacking supports on the square wood pipe pieces.
The above description is only for the embodiments of the present invention, and the description is specific and detailed, but not for this reason, the scope of the present invention should be limited. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several changes and modifications can be made, which all fall within the scope of the present invention.
Claims (10)
1. The utility model provides a to shield earlier afterwards expand tunnel segment demolish frock for demolish section of jurisdiction, its characterized in that: the duct piece is formed by splicing a top sealing block, a first adjacent block, a second adjacent block, a first standard block, a second standard block and a third standard block; rock soil is filled in the pipe piece,
the dismantling tool comprises a plurality of groups of supporting plate assemblies and inclined struts, wherein the supporting plate assemblies are arranged between the rock-soil surface and the third standard block along the tunnel direction; the diagonal brace is disposed between the first standard block and the third standard block along a tunnel direction.
2. The tool for removing the tunnel segment shield-then-tunnel segment as claimed in claim 1, wherein: and a plurality of segment bolt hole grooves are uniformly distributed on the first standard block and the third standard block.
3. The tool for dismantling the tunnel segment shield-first and then-expanding tunnel segment as claimed in claim 2, wherein: the construction of the backup plate assembly is: the rock and soil surface sets up the backup pad, the backup pad upper surface is equipped with the top and holds in the palm, install the steel pipe on holding in the palm in the top, the end of steel pipe is fixed on the third standard block.
4. The tool for dismantling the tunnel segment shield-first and then-expanding tunnel segment as claimed in claim 3, wherein: the tail end of the steel pipe is clamped in the segment bolt hole groove of the third standard block.
5. The tool for dismantling the tunnel segment shield-first and then-expanding tunnel segment as claimed in claim 3, wherein: and a plurality of groups of square wood pipe pieces are correspondingly fixed on the third standard block, and the tail end of the steel pipe on each group of the support plate component is abutted against the corresponding square wood pipe piece.
6. The tool for dismantling the tunnel segment shield-then-enlarging tunnel segment as claimed in any one of claims 3 to 5, wherein: and a cross brace is arranged between the adjacent steel pipes.
7. The tool for removing the tunnel segment shield-then-tunnel segment as claimed in claim 2, wherein: and two ends of the inclined strut are respectively clamped in the segment bolt hole grooves on the first standard block and the third standard block.
8. The tool for dismantling the tunnel segment shield-first and then-expanding tunnel segment as claimed in claim 1, wherein: the inclined struts are parallel to each other, and the distance between every two adjacent inclined struts is 50 centimeters.
9. The tool for removing the tunnel segment shield-then-tunnel segment as claimed in claim 1, wherein: and hanging rings are embedded in the first adjacent block and the second adjacent block.
10. The tool for removing the tunnel segment shield-then-tunnel segment as claimed in claim 9, wherein: and a traction rope is fixed on the lifting ring and is tensioned through a hand hoist arranged on the primary support structure.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220838158 | 2022-04-12 | ||
| CN2022208381586 | 2022-04-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218293602U true CN218293602U (en) | 2023-01-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222347447.9U Active CN218293602U (en) | 2022-04-12 | 2022-09-02 | Demolish frock to shield earlier and expand tunnel segment of digging |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP3240328U (en) |
| CN (1) | CN218293602U (en) |
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2022
- 2022-09-02 CN CN202222347447.9U patent/CN218293602U/en active Active
- 2022-10-13 JP JP2022003391U patent/JP3240328U/en active Active
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| JP3240328U (en) | 2022-12-23 |
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