CN111236954B - Sand box counter-force device for shield initiation in tunnel and negative ring pipe piece dismantling method - Google Patents

Sand box counter-force device for shield initiation in tunnel and negative ring pipe piece dismantling method Download PDF

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Publication number
CN111236954B
CN111236954B CN202010110944.XA CN202010110944A CN111236954B CN 111236954 B CN111236954 B CN 111236954B CN 202010110944 A CN202010110944 A CN 202010110944A CN 111236954 B CN111236954 B CN 111236954B
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China
Prior art keywords
box
sand
negative ring
closed
tunnel
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Chinese (zh)
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CN111236954A (en
Inventor
付智多
车家伟
彭嵚
骆小芳
那围榕
李超
刘金达
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Rail Transit Construction Co Ltd of China Construction Eighth Engineering Division Co Ltd
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Rail Transit Construction Co Ltd of China Construction Eighth Engineering Division Co Ltd
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Application filed by Rail Transit Construction Co Ltd of China Construction Eighth Engineering Division Co Ltd filed Critical Rail Transit Construction Co Ltd of China Construction Eighth Engineering Division Co Ltd
Priority to CN202010110944.XA priority Critical patent/CN111236954B/en
Publication of CN111236954A publication Critical patent/CN111236954A/en
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Publication of CN111236954B publication Critical patent/CN111236954B/en
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Classifications

    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D9/00Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
    • E21D9/06Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
    • E21D9/0607Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining the shield being provided with devices for lining the tunnel, e.g. shuttering
    • E21D9/0609Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining the shield being provided with devices for lining the tunnel, e.g. shuttering with means for applying a continuous liner, e.g. sheets of plastics, between the main concrete lining and the rock
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D11/00Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
    • E21D11/04Lining with building materials
    • E21D11/08Lining with building materials with preformed concrete slabs

Abstract

The invention provides a sand box counterforce device for shield initiation in a tunnel and a negative ring pipe piece dismantling method, wherein the sand box counterforce device comprises: the sand-discharging device comprises a first box body, a second box body and a sand-discharging device, wherein the first box body is provided with a first closed end and a first open end opposite to the first closed end, and a closable sand outlet is formed in the side wall of the first box body; the second box body is provided with a second closed end and a second open end opposite to the second closed end, the second closed end is provided with a closable sand inlet, and the second open end can be movably inserted into the first box body relative to the length direction of the first box body; the connecting screw rod is fixed on the second closed end; and the sand body is filled in an inner cavity formed by the first box body and the second box body. The device disclosed by the invention breaks the difficulty in installing a counter-force support system, removing a negative ring duct piece and the like in the conventional method, optimizes the construction process and obviously improves the operation efficiency.

Description

Sand box counter-force device for shield initiation in tunnel and negative ring pipe piece dismantling method
Technical Field
The invention relates to the technical field of building construction, in particular to a sand box counterforce device for shield initiation in a tunnel and a negative ring pipe piece dismantling method.
Background
At present, rail transit such as subway has become one of the main development directions of the modern city construction of our country. The shield construction method has the advantages of high safety, high working efficiency, small influence on the surrounding environment, environmental friendliness, high construction speed, guaranteed quality, high economical efficiency and the like, and is widely applied to the construction of tunnels in subway sections. With the progress of the shield construction technology level, the shield starting conditions and the shield starting modes are diverse and different, and can be roughly divided into two types: one is initiated in a station shield originating well, the other is initiated in a tunnel constructed by a mining method, and the two initiating modes are most representative in a subway shield. The starting mode in the mine construction tunnel is divided into a straight starting mode (starting by coincidence of the central line of the starting shield body and the central line of the tunnel) and a curve starting mode (starting by incomplete coincidence of the central line of the starting shield body and the central line of the tunnel or starting positions on a gentle curve section of the curve). If the originating form in the tunnel is adopted, a shield originating working well and an originating transverse passage are usually correspondingly arranged in the section, one side of the transverse passage is a shield method section, and the other side of the transverse passage is a mine method section. The well descending position of the shield machine is located in a shield starting working well, the well descending is hoisted in a subsection mode, after a shield body and a cutter head of the shield machine are hoisted and descended into the well and are assembled, the shield machine is translated to a horizontal channel appointed excavation line inlet, and starting work can be carried out when other work is ready. When the shield construction starts to drive, the shield machine is propelled forwards, and a reaction force is required to be provided for the driving of the shield machine through the back reaction force supporting system, and the reaction force supporting system plays a role in lifting.
In the shield starting construction process, some common and difficult-to-solve problems are often encountered, such as various problems of the setting form of the counterforce support system, how to install and remove the counterforce support system, how to smoothly remove the negative ring pipe piece and the like when the shield machine needs to start in a straight form or a curve form in a limited operation space in a standard horseshoe tunnel constructed by a mine method. In the shield starting construction, the stability of the structure is the key for ensuring that the shield machine does not deform, and simultaneously, the stability is the decisive factor for ensuring that the central axis of the tunnel does not deviate, and the counter-force supporting structure plays a vital role. If improper arrangement is carried out in the construction process, the underground tunnel concrete structure is easily damaged, the normal service life of the underground tunnel concrete structure is influenced, and the normal safe starting of the shield is influenced.
In the actual shield starting construction process, in order to effectively solve the above problems, some traditional measures are often adopted. If often can adopt the form of bedding steel sheet between burden ring section of jurisdiction and undercut tunnel structure, let burden ring section of jurisdiction direct action contact on the steel sheet plane to provide the holding surface of counter-force, avoid the structure to suffer shield structure propulsive concentrated counter-force and cause undercut tunnel structure's unexpected destruction, thereby ensure that the shield structure is safe originates smoothly, when treating that the shield constructs the quick-witted tunnelling to 50 ~ 60 rings, can cut it and demolish. Practice proves that the method has a plurality of defects, on one hand, because the operation space in the tunnel is limited, the tunnel is not suitable for fixing when the bedding steel plate is arranged, the safety and stability of the steel plate cannot be ensured, and certain danger is caused; on the other hand, due to the propelling of the shield, the negative ring duct piece is tightly fastened and stressed with the bedding steel plate and the underground excavated tunnel structure, and the moving space of the duct piece is limited in the process of dismantling the negative ring duct piece, so that the dismantling of the negative ring duct piece is difficult; secondly, if the shield machine starts in the curve form in the standard horseshoe tunnel constructed by the mining method, uneven gaps and included angles can be generated between the negative ring duct piece and the underground excavated tunnel structure surface, so that gaps at different point positions are different in size, and the bedding steel plate cannot meet the construction conditions.
Disclosure of Invention
In view of the above circumstances, the present invention provides a flask reaction device for shield initiation in a tunnel and a method for removing a negative collar piece, which solve the technical problems of the conventional reaction device having the above drawbacks.
In order to achieve the purpose, the invention adopts the technical scheme that: the utility model provides a shield constructs to begin with sand box counterforce device based on in tunnel, includes:
the first box body is provided with a first closed end for closely abutting against a concrete structure of the underground excavated tunnel and a first open end opposite to the first closed end, and the side wall of the first box body is provided with a closable sand outlet;
the second box body is provided with a second closed end for closely abutting against the negative ring pipe piece and a second open end opposite to the second closed end, the second closed end is provided with a sand inlet which is communicated with the interior of the second box body and can be closed, and the second open end can be movably inserted into the first box body relative to the length direction of the first box body;
the end part of the connecting screw rod is fixed on the second closed end;
and the sand body is filled in an inner cavity formed by the second box body and the first box body.
In an embodiment of the present invention, the first closed end is closed by an end plate, and a size of the first end plate is not smaller than an outer diameter of the first tank.
In an embodiment of the present invention, the second closed end is closed by using a second end plate, and a size of the second end plate is not smaller than an outer diameter of the second tank.
In the embodiment of the invention, the sand outlet is arranged close to the first closed end.
In the embodiment of the invention, the connecting screw rod is also provided with a bolt hole sealing ring.
In the embodiment of the invention, the connecting screw rod is also provided with a bolt washer.
In the embodiment of the invention, the connecting screw rod is an arc-shaped rod with the radian identical to that of the embedded bolt hole.
In the embodiment of the invention, the sand outlet and the sand inlet are plugged by plugging bolts.
In the embodiment of the invention, the sand body is dry fine sand.
The invention also provides a method for dismantling the negative ring pipe piece, which comprises the following steps:
providing the sand box counterforce device for shield initiation in the tunnel;
installing the sand box counterforce device for starting the shield in the tunnel between the underground excavated tunnel concrete structure and the negative ring duct piece at intervals along the section of the negative ring duct piece, and performing tunneling by a shield machine;
after the tunneling of the shield tunneling machine is finished, opening the sand outlet, enabling the sand body to flow out of the sand outlet and drive the second box body to contract and move towards the first box body, and removing the close contact state between the sand box counterforce device and the negative ring pipe sheet and between the concrete structures of the underground excavated tunnels;
the connecting screw rod is pulled out of the embedded bolt hole of the negative ring pipe piece, the sand box counterforce device is removed, and a vacant space for detaching the negative ring pipe piece is defined between the negative ring pipe piece and the underground excavated tunnel concrete structure;
and removing the negative ring pipe piece.
Due to the adoption of the technical scheme, the invention has the following beneficial effects:
(1) the sand box counter-force device for the shield initiation in the tunnel has the advantages of simple structure, convenient use and operation, and rapid connection, installation and removal, reduces the labor intensity, overcomes the defects of infirm installation of a counter-force support system and the need of cutting and removal in the conventional method and the difficulty in the removal of a negative ring pipe sheet caused by the use of the traditional counter-force support system, optimizes the construction process, and obviously improves the operation efficiency; the device can be used in a turnover mode, is economical and practical, and reduces resource waste.
(2) The sand box counterforce device for the shield initiation in the tunnel is provided with the connecting screw component, so that the connection is safe and reliable, and the stability of the device in use is greatly improved.
(3) The device has strong applicability, breaks the limitation of application of methods such as steel plate paving and the like, and is suitable for shield initiation in various forms (in limited space and in curved forms in a tunnel).
(4) The device is simple to manufacture, can be welded and assembled by using local materials on the construction site, reduces the construction cost and fully embodies the economy and the practicability.
Drawings
FIG. 1 is a schematic front view of a sand box counterforce device for shield initiation in a tunnel.
FIG. 2 is a schematic view of the use state of the flask reaction force device for shield initiation in a tunnel according to the present invention.
FIG. 3 is a schematic view of the construction of the connecting screw of the present invention.
Fig. 4 is a schematic view of the second casing of the present invention before it is moved toward the first casing.
Fig. 5 is a schematic view of the second casing of the present invention after being moved toward the first casing.
Fig. 6 is a schematic sectional view of the concrete structure of the underground excavated tunnel according to the present invention.
FIG. 7 is a schematic cross-sectional view of a negative ring segment of the present invention.
The correspondence of reference numerals to components is as follows:
a negative ring segment 1; embedding the bolt holes 11; a tunnel concrete structure 2 is excavated; a sand box counterforce device 3; a first case 31; a sand outlet 311; a first end plate 312; a second case 32; a sand inlet 321; a second end plate 322; a connecting screw 33; a fastening nut 331; a bolt washer 332; bolt hole seal rings 333; a sand body 34; and a sealing bolt 4.
Detailed Description
To facilitate an understanding of the present invention, the following description is made in conjunction with the accompanying drawings and examples.
Referring to fig. 1 and 2, the invention provides a sand box counterforce device for originating shield in a tunnel, which is used between a negative ring pipe piece 1 and a concrete structure 2 of an underground excavated tunnel, and the sand box counterforce device 3 comprises:
the first box body 31 is provided with a first closed end for closely abutting against the underground excavated tunnel concrete structure 2 and a first open end opposite to the first closed end, the side wall of the first box body 31 is provided with a closable sand outlet 311, furthermore, a sealing bolt 4 for sealing the sand outlet 311 is arranged in the sand outlet 311, the outer wall of the sealing bolt 4 is provided with an external thread, and the inner wall of the sand outlet 311 is provided with an internal thread screwed with the sealing bolt 4;
the second box body 32 is provided with a second closed end for closely abutting against the negative ring pipe piece 1 and a second open end opposite to the second closed end, specifically, the second closed end is closed by a second end plate 322, the second closed end is provided with a sand inlet 321 communicated with the inside of the second box body 32, the sand inlet 321 is a closable sand inlet, further, a sealing bolt 4 is arranged in the sand inlet 321, an inner wall of the sand inlet 321 is formed with an inner thread screwed with the sealing bolt 4, and the second open end can be movably inserted into the first box body 31 relative to the length direction of the first box body;
the connecting screw rod 33 is used for penetrating through the embedded bolt hole 11 of the negative ring segment 1, and the end part of the connecting screw rod 33 is fixed on the second closed end;
the sand 34, as shown in fig. 4 and 5, is filled in the inner cavity defined by the second box 32 and the first box 31. Specifically, the sand 34 enters the second box 32 through the sand inlet 321 and enters the first box 31 through the second opening end, and the sand 34 has a tendency to drive the second box 32 to move toward the first box 31 when flowing out from the sand outlet 311.
In the embodiment of the present invention, the first end of the first box 31 is closed by a first end plate 312, and the size of the first end plate 312 is not smaller than the outer diameter of the first box 31; the first end plate 312 abuts against the underground excavated tunnel concrete structure 2, so that the contact surface between the sand box counterforce device 3 and the underground excavated tunnel concrete structure 2 can be increased, and the underground excavated tunnel concrete structure 2 is prevented from being easily damaged due to the ejection force. The second closed end is closed by a second end plate 322, and the size of the second end plate 322 is not smaller than the outer diameter of the second box body 32; the second end plate 322 is arranged to increase the contact surface between the flask counterforce device 3 and the negative ring segment 1, and prevent the negative ring segment from being damaged by a squeezing structure.
In the embodiment of the invention, the first box body 31 and the second box body 32 are both cylindrical box bodies, the first box body 31 and the second box body 32 are manufactured by cutting appropriate lengths by using steel pipes, and the first box body 31 and the second box body 32 have enough strength and rigidity to meet the safety of thrust extrusion of shield tunneling; preferably, the outer diameter of the second casing 32 is smaller than the inner diameter of the first casing 31 so that the second casing 32 can be inserted into the first casing 31 and can move within the first casing 31; further, the diameter of the first box 31 matches with the diameter of the second box 32, and the first box 31 and the second box 32 should ensure that the internal environment is airtight when being assembled and spliced, so as to avoid the sand body flowing out from the first opening end of the first box 31 after filling dry fine sand. The diameters of the first box 31 and the second box 32 can be set according to the wall thickness of the negative ring segment 1.
In the embodiment of the present invention, in order to increase the outflow amount of sand in the first tank 31 and the second tank 32, the sand outlet 311 is disposed near the first closed end, so that the second tank 32 is pushed by the first tank 31 when receiving the pushing force, and sand in the first tank 31 can flow out from the sand outlet 311 to a greater extent.
In the embodiment of the present invention, as shown in fig. 3, a fastening nut 331 is disposed on the connecting screw rod 33 for fastening the connecting screw rod 33; the connecting screw rod 33 is also provided with a bolt washer 332; the connecting screw 33 is further provided with a bolt hole sealing ring 333.
In the embodiment of the invention, the connecting screw rod 33 is an arc-shaped rod with the same radian as the embedded bolt hole 11; the connecting screw rods 33 are made of the same material as the duct pieces in assembling, and the connecting screw rods 33 and the second box body 32 are fixed through welding.
In the embodiment of the invention, the section of the underground excavated tunnel concrete structure 2 is horseshoe-shaped as shown in fig. 6.
FIG. 7 is a schematic cross-sectional view of a negative ring segment 1 of the present invention; the sand box counterforce devices 3 are arranged corresponding to the embedded bolt holes 11, and the number of the sand box counterforce devices 3 can be reduced according to requirements; preferably, the flask reaction-force devices 3 are symmetrically arranged between the negative ring segment 1 and the underground excavated tunnel concrete structure 2.
The construction of the flask counterforce device for shield initiation in a tunnel according to the present invention is described above specifically, and the method of using the flask counterforce device for shield initiation in a tunnel according to the present invention is described below, and the method includes the following steps:
providing the sand box counterforce device 3 for originating the shield in the tunnel;
installing the sand box counterforce device 3 for starting the shield in the tunnel between the underground excavated tunnel concrete structure 2 and the negative ring pipe piece 1 at intervals along the section of the negative ring pipe piece 1, and performing tunneling by the shield machine;
specifically, the specific length of the second box body 32 inserted into the first box body 31 is determined according to the distance between the negative ring duct base standard ring and the underground excavated tunnel concrete structure 2, a sand body 34 with a proper volume is filled into the second box body 32 and the first box body 31 through a sand inlet 321, the sand body 34 is preferably dry fine sand, so that the fluidity of the sand body 34 is good, and after the sand body 34 is filled, a sealing bolt 4 corresponding to the sand inlet 321 is screwed down, so that the interior of the second box body 32 is ensured to be sealed, and the filled dry fine sand is prevented from flowing out;
after the first ring negative ring pipe piece is assembled, a connecting screw 33 fixed on the second box body 32 penetrates into a pre-embedded bolt hole 11 of the negative ring pipe piece 1, and the end part of the connecting screw 33 far away from the second box body 32 penetrates out of the pre-embedded bolt hole 11 and is fastened with a fastening nut 331; preferably, before the fastening nut 331 is screwed in, a bolt hole sealing ring 333 and a bolt washer 332 are inserted into the end of the connecting screw rod 33 to ensure the sealing performance of the pre-embedded bolt hole 11 and prevent the stress concentration between the fastening nut 331 and the negative ring pipe piece 1 from damaging the structure of the negative ring pipe piece 1;
after the sand box counterforce device 3 is installed and connected, the first negative ring pipe piece 1 is pushed out of the shield tail by a propulsion oil cylinder, when the sand box counterforce device is pushed, the stroke of the propulsion oil cylinder is controlled to be kept consistent as much as possible, certain thrust is applied to tightly press the first negative ring pipe piece 1 and the sand box counterforce device 3 on the surface of the underground excavation tunnel concrete structure 2, mutual adhesion is ensured, so that the counterforce for forward tunneling of the shield tunneling machine is provided, the shield tunneling machine is ensured to be capable of smoothly pushing forward, and the next ring of pipe pieces can be installed;
after the tunneling of the shield tunneling machine is finished, the sand outlet 311 is opened, the sand body 34 flows out of the sand outlet 311 and drives the second box body 32 to contract and move towards the first box body 31, and a vacant space for detaching the negative ring pipe pieces is formed between the first box body and the negative ring pipe pieces;
specifically, in the actual construction process, when the shield tunneling machine tunnels to 50-60 rings, the negative ring segment 1 can be removed, and when the shield tunneling machine tunnels to 50-60 rings, the sealing bolt 4 for plugging the sand outlet 311 is firstly opened to enable dry fine sand in the first box body 31 to flow out, the volume of the dry fine sand in the first box body 31 is reduced, so that the second box body 32 can contract and move, and the close contact state between the sand box counterforce device and the negative ring segment 1 and between the underground excavated tunnel concrete structure 2 is relieved;
screwing off a fastening nut 331, a bolt washer 332 and a bolt hole sealing ring 333 on the connecting screw rod 33, drawing out the connecting screw rod 33 from the embedded bolt hole 11 of the negative ring segment 1, and removing the sand box counterforce device 3, wherein a vacant space for detaching the negative ring segment 1 is defined between the negative ring segment 1 and the underground excavated tunnel concrete structure 2; (ii) a When the sand box counterforce device 3 is dismounted, the operation is cautious to prevent the components from sliding off and hurting people;
and (4) removing the negative ring pipe piece 1.
According to the invention, the second box body 32 moves towards the first box body 31 through the outflow of the sand body 34, the close contact relation between the sand box counterforce device and the negative ring pipe piece 1 and the undercut tunnel concrete structure 2 is removed, the sand box counterforce device 3 can be conveniently removed, a large vacant space is provided for the removal of the negative ring pipe piece 1 after the sand box counterforce device 3 is removed, the operation condition of the removal of the negative ring pipe piece 1 is met, the smooth removal of the negative ring pipe piece 1 can be carried out, and the operation efficiency of the removal work of the negative ring pipe piece 1 is effectively improved.
While the present invention has been described in detail and with reference to the accompanying drawings and examples, it will be apparent to one skilled in the art that various changes and modifications can be made therein. Therefore, certain details of the embodiments are not to be interpreted as limiting, and the scope of the invention is to be determined by the appended claims.

Claims (1)

1. A negative ring pipe piece dismantling method is characterized by comprising the following steps:
providing a sand box counterforce device for shield initiation in a tunnel; based on shield constructs to begin with sand box counterforce device in tunnel includes: the first box body is provided with a first closed end for closely abutting against a concrete structure of the underground excavated tunnel and a first open end opposite to the first closed end, and the side wall of the first box body is provided with a closable sand outlet; the second box body is provided with a second closed end for closely abutting against a negative ring pipe sheet and a second open end opposite to the second closed end, the second closed end is provided with a sand inlet which is communicated with the interior of the second box body and can be closed, and the second open end can be movably inserted into the first box body relative to the length direction of the first box body; the end part of the connecting screw rod is fixed on the second closed end; the sand body is filled in an inner cavity formed by the second box body and the first box body;
installing the sand box counterforce device for starting the shield in the tunnel between the underground excavated tunnel concrete structure and the negative ring duct piece at intervals along the section of the negative ring duct piece, and performing tunneling by a shield machine;
after the tunneling of the shield tunneling machine is finished, opening the sand outlet, enabling the sand body to flow out of the sand outlet and drive the second box body to contract and move towards the first box body, and removing the close contact state between the sand box counterforce device and the negative ring pipe sheet and between the concrete structures of the underground excavated tunnels;
the connecting screw rod is pulled out of the embedded bolt hole of the negative ring pipe piece, the sand box counterforce device is removed, and a vacant space for detaching the negative ring pipe piece is defined between the negative ring pipe piece and the underground excavated tunnel concrete structure;
and removing the negative ring pipe piece.
CN202010110944.XA 2020-02-21 2020-02-21 Sand box counter-force device for shield initiation in tunnel and negative ring pipe piece dismantling method Active CN111236954B (en)

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CN111236954B true CN111236954B (en) 2021-08-17

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Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1037674A (en) * 1996-07-22 1998-02-10 O K M:Kk Discharge soil disposal device in small-diameter pipe jack method
CN102080356A (en) * 2010-12-17 2011-06-01 中铁大桥局集团第四工程有限公司 Box girder positioning temporary supporting seat and positioning construction method of box girder
CN103016031A (en) * 2012-12-04 2013-04-03 付志亮 Mining telescopic support and using method thereof
CN103711496A (en) * 2013-12-30 2014-04-09 上海市机械施工集团有限公司 Counter-force system for rectangular shield tunneling
CN104033157A (en) * 2014-06-10 2014-09-10 中铁建设投资集团有限公司 Movable reaction equipment for shield launching shaft
CN207777770U (en) * 2017-12-13 2018-08-28 北京住总集团有限责任公司 A kind of precast spliced pipe fitting jacking system
CN208441842U (en) * 2018-06-29 2019-01-29 中铁工程装备集团有限公司 A kind of shield launching counter-force support system
CN209040849U (en) * 2018-11-02 2019-06-28 中铁七局集团郑州工程有限公司 A kind of negative endless tube sheet connecting apparatus of shield tunnel construction
CN110454191A (en) * 2019-08-21 2019-11-15 中建八局轨道交通建设有限公司 The construction method of the length adjustment ring of negative endless tube piece and negative endless tube piece
CN110529129A (en) * 2019-10-09 2019-12-03 中建八局轨道交通建设有限公司 For the shield launching counter-force support device and counter-force method for supporting in narrow space

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1037674A (en) * 1996-07-22 1998-02-10 O K M:Kk Discharge soil disposal device in small-diameter pipe jack method
CN102080356A (en) * 2010-12-17 2011-06-01 中铁大桥局集团第四工程有限公司 Box girder positioning temporary supporting seat and positioning construction method of box girder
CN103016031A (en) * 2012-12-04 2013-04-03 付志亮 Mining telescopic support and using method thereof
CN103711496A (en) * 2013-12-30 2014-04-09 上海市机械施工集团有限公司 Counter-force system for rectangular shield tunneling
CN104033157A (en) * 2014-06-10 2014-09-10 中铁建设投资集团有限公司 Movable reaction equipment for shield launching shaft
CN207777770U (en) * 2017-12-13 2018-08-28 北京住总集团有限责任公司 A kind of precast spliced pipe fitting jacking system
CN208441842U (en) * 2018-06-29 2019-01-29 中铁工程装备集团有限公司 A kind of shield launching counter-force support system
CN209040849U (en) * 2018-11-02 2019-06-28 中铁七局集团郑州工程有限公司 A kind of negative endless tube sheet connecting apparatus of shield tunnel construction
CN110454191A (en) * 2019-08-21 2019-11-15 中建八局轨道交通建设有限公司 The construction method of the length adjustment ring of negative endless tube piece and negative endless tube piece
CN110529129A (en) * 2019-10-09 2019-12-03 中建八局轨道交通建设有限公司 For the shield launching counter-force support device and counter-force method for supporting in narrow space

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