CN211777436U - Splicing counterforce device for starting shield in tunnel - Google Patents

Splicing counterforce device for starting shield in tunnel Download PDF

Info

Publication number
CN211777436U
CN211777436U CN202020192597.5U CN202020192597U CN211777436U CN 211777436 U CN211777436 U CN 211777436U CN 202020192597 U CN202020192597 U CN 202020192597U CN 211777436 U CN211777436 U CN 211777436U
Authority
CN
China
Prior art keywords
bolt
tunnel
shield
counterforce
unloading block
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202020192597.5U
Other languages
Chinese (zh)
Inventor
付智多
李晋
耿晓亮
唐立宪
郑永杰
陈万全
于在洋
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Rail Transit Construction Co Ltd of China Construction Eighth Engineering Division Co Ltd
Original Assignee
Rail Transit Construction Co Ltd of China Construction Eighth Engineering Division Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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 CN202020192597.5U priority Critical patent/CN211777436U/en
Application granted granted Critical
Publication of CN211777436U publication Critical patent/CN211777436U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Abstract

The utility model provides a shield constructs to begin with concatenation counterforce device based on in tunnel, include: the outer edges of the butt joint surfaces of the two adjacent force unloading block units are respectively formed with connecting plates, bolt connecting holes are formed in each connecting plate at intervals, and the two adjacent force unloading block units are connected and fastened by penetrating the bolt connecting holes in each connecting plate through fastening bolts; the first surface of the force unloading block unit, which deviates from the butt joint surface, is fixedly provided with a segment connecting bolt for penetrating and connecting with an embedded bolt hole of a negative ring segment, and the force unloading block unit is provided with a second surface, which deviates from the butt joint surface and is in close contact with a concrete structure of an underground excavated tunnel. The utility model discloses broken the insecure, need the cutting of conventional method installation counter-force braced system and demolishd and use traditional counter-force braced system to lead to the defect that the negative loop pipe piece demolishs the difficulty, optimized construction process, showing and improving the operating efficiency.

Description

Splicing counterforce device for starting shield in tunnel
Technical Field
The utility model relates to a construction technical field relates to a shield constructs originated with concatenation counterforce device particularly based on in tunnel.
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 method construction is widely applied to the construction of tunnels in subway sections by virtue of the advantages of higher safety, higher working efficiency, smaller influence on the surrounding environment, high construction speed, guaranteed quality, higher economy and the like. With the continuous 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, and the other is initiated in a tunnel constructed by a mining method. 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 shield machine is started in the tunnel constructed by the mining method, a shield starting working well and a starting transverse passage are usually correspondingly arranged in the section, one side of the transverse passage is the shield method section, and the other side of the transverse passage is the mining method section. And hoisting the shield machine in the shield starting working well, adopting subsection hoisting to lower the well, translating to a specified excavation line inlet of the transverse passage after the shield body and the cutter head of the shield machine are hoisted to lower the well and are assembled, 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 selection of setting forms 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 is also a decisive factor for ensuring that the central axis of the tunnel does not deviate, and the counter-force support structure plays a crucial role in the process. If the counter-force supporting system is improperly arranged in the construction process, the underground excavated tunnel concrete structure is easily damaged, the normal service life of the underground excavated tunnel concrete structure is influenced, and the normal safe starting of the shield is also 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 its 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 the concentrated counter-force that the shield constructs the propulsion and cause the unexpected destruction of undercut tunnel structure, thereby ensure that the shield constructs safe smooth originating, 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 a curve form in a standard horseshoe-shaped tunnel constructed by a 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 can not meet construction conditions.
SUMMERY OF THE UTILITY MODEL
In view of the above, the utility model provides a shield constructs originating with concatenation counterforce device in tunnel based on, solve current counterforce device and have the technical problem of above-mentioned defect.
In order to achieve the purpose, the utility model adopts the technical proposal that: the utility model provides a shield is originated with concatenation counterforce device based on in tunnel includes:
the force unloading block body comprises at least two force unloading block units which are connected in a splicing manner, connecting plates are respectively formed on the outer edges of the butt joint surfaces of the two adjacent force unloading block units, bolt connecting holes are formed in each connecting plate at intervals, and the two adjacent force unloading block units are connected and fastened through fastening bolts penetrating through the bolt connecting holes in the connecting plates;
the first surface of the force unloading block unit, which deviates from the butt joint surface, is fixedly provided with a segment connecting bolt for penetrating and connecting with an embedded bolt hole of a negative ring segment, and the force unloading block unit is provided with a second surface, which deviates from the butt joint surface and is in close contact with a concrete structure of an underground excavated tunnel.
In the embodiment of the utility model provides an in, the first surface the second is fixed with the backing plate respectively on the surface, each the backing plate size is greater than respectively the first surface the second surface.
In the embodiment of the utility model, still be equipped with the bolt hole sealing washer on the section of jurisdiction connecting bolt.
In the embodiment of the utility model provides an in, still be equipped with bolt packing ring on the section of jurisdiction connecting bolt.
In the embodiment of the utility model, the section of jurisdiction connecting bolt be with the same arc pole of the radian of buried bolt hole in advance.
The utility model discloses owing to adopted above technical scheme, make it have following beneficial effect:
(1) the utility model discloses based on shield constructs in the tunnel and originally uses concatenation counterforce device simple structure, use convenient operation, connect installation and demolish rapidly, alleviateed intensity of labour, broken through the conventional method and installed the counterforce braced system and install insecure, need cut demolish and use traditional counterforce braced system to lead to the defect that the negative ring canal piece is demolishd difficultly, optimized the construction technology, showing and improving the operating efficiency; just the utility model discloses the device can have enough to meet the need use, economical and practical, reduce the wasting of resources.
(2) The utility model discloses based on shield constructs in the tunnel and originally sets up section of jurisdiction connecting bolt component with concatenation counterforce device, connect safe and reliable, greatly increased the firm characteristic that the device used.
(3) The utility model discloses the device suitability is strong, has broken the limitation that methods such as bedding steel sheet were suitable for, and the shield of applicable multiple form (in the finite space in the tunnel, curve form) is originated.
(4) The utility model discloses device simple manufacture, job site side can draw materials on the spot and weld the equipment and form, has reduced construction cost, has fully embodied economic nature and practicality.
Drawings
Fig. 1 is the utility model discloses shield is originated with concatenation counterforce device's main view schematic diagram based on in tunnel.
Fig. 2 is a schematic view of the utility model based on the use state of the splicing counterforce device for originating shield in the tunnel.
Fig. 3 is the utility model discloses three-dimensional schematic diagram based on shield constructs originating with concatenation counterforce device in the tunnel.
Fig. 4 is a schematic structural view of the segment connecting bolt of the present invention.
Fig. 5 is a schematic sectional view of the negative ring segment of the present invention.
Fig. 6 is a schematic sectional view of the concrete structure of the underground excavated tunnel according to the present invention.
The correspondence of reference numerals to components is as follows:
a force-releasing block unit 1; a connecting plate 11; a backing plate 12; a fastening bolt 2; segment connecting bolts 3; a bolt washer 31; bolt hole seal rings 32; a negative ring canal sheet 4; pre-burying the bolt holes 41; a fastening nut 5; the tunnel concrete structure 6 is excavated.
Detailed Description
To facilitate understanding of the present invention, the following description is made with reference to the accompanying drawings and examples.
Please refer to fig. 1 to 3, the utility model provides a shield constructs to begin with concatenation counterforce device based on in tunnel, include:
the outer edges of the butt joint surfaces of the two adjacent force unloading block units 1 are respectively provided with a connecting plate 11, bolt connecting holes are arranged on each connecting plate 11 at intervals, and the two adjacent force unloading block units 1 are connected and fastened by penetrating the bolt connecting holes on each connecting plate 11 through fastening bolts 2;
and a duct piece connecting bolt 3 for penetrating and connecting with a pre-embedded bolt hole 41 of a negative ring duct piece 4 is fixed on a first surface of the force unloading block unit 1, which is far away from the butt joint surface, and the force unloading block unit 1 is provided with a second surface, which is far away from the butt joint surface, for closely contacting with a concrete structure 6 of an underground excavated tunnel.
In the embodiment of the present invention, the first surface and the second surface are respectively fixed with a backing plate 12, and the size of the backing plate 12 is respectively larger than the first surface and the second surface. The setting of backing plate 12 does benefit to the increase unload power piece unit 1 with the anion pipe piece 4 the area of contact of undercut tunnel concrete structure 6 avoids anion pipe piece 4 undercut tunnel concrete structure 6 receives the shield constructs too big stress when machine push-up effect, structural damage.
In the embodiment of the utility model provides an in, the connecting plate 11 backing plate 12 all adopts the steel sheet preparation that 2cm is thick, confirms concrete size according to on-the-spot actual conditions after, and the manual work is cut and is drawn materials. Three bolt connecting holes matched with the diameters of the fastening bolts 2 are reserved on two opposite sides of the connecting plate 11 respectively.
In the embodiment of the present invention, the force unloading block unit 1 is formed by welding four rectangular steel plates, and the connecting plate 11 and the backing plate 12 are respectively fixed at two opposite ends of the force unloading block unit 1, so that the force unloading block unit 1 is surrounded to form a closed cavity; the force-unloading block unit 1 must have sufficient strength and rigidity to meet the requirements of shield tunneling thrust extrusion.
In the embodiment of the present invention, as shown in fig. 4, the segment connecting bolt 3 is provided with a fastening nut 5; the segment connecting bolt 3 is also provided with a bolt washer 31; the segment connecting bolt 3 is also provided with a bolt hole sealing ring 32; the segment connecting bolt is an arc-shaped rod with the same radian as the embedded bolt hole 41. The segment connecting bolt 3 is made of connecting bolts which are the same as those of segment assembling, and the segment connecting bolt 3 and the force unloading block unit 1 are fixed through welding; the length of the segment connecting bolt 3 can be intercepted according to actual needs.
In the embodiment of the present invention, as shown in fig. 5, which is a schematic cross-sectional view of the negative ring pipe piece 4 of the present invention, the splicing reaction device is arranged corresponding to the pre-buried bolt hole 41, and the number of the splicing reaction devices can be reduced as required; preferably, the splicing counterforce device is symmetrically arranged between the negative ring pipe piece 4 and the underground excavated tunnel concrete structure 6; the section of the underground excavated tunnel concrete structure 6 is horseshoe-shaped as shown in fig. 6.
In the embodiment of the present invention, the wall thickness of the negative ring pipe piece 4 is 300mm, and the size of the force unloading block unit 1 is 400mm × 400 mm.
Unload power piece unit 1 and negative ring pipe piece 4, the area of contact of undercut tunnel concrete structure 6 compares and adopts a monoblock steel sheet clamp to locate the area of contact between negative ring pipe piece and the undercut tunnel concrete structure little among the prior art, and this application concatenation counterforce device arranges along undercut tunnel concrete structure section interval, mutual independence between each other, loose adjacent 2 backs of fastening bolt between the power piece unit 1 of unloading, although concatenation counterforce device is in the close-fitting state, only need use less effort to strike and just can will unload power piece unit 1 between the position of staggering, alright demolish concatenation counterforce device, all the other concatenation counterforce devices are demolishd to the repetition so.
The utility model discloses a structure based on shield constructs in tunnel and starts to use concatenation counterforce device, its method of use is explained below, includes following step:
providing the splicing counterforce device for initiating the shield in the tunnel;
installing the splicing counterforce device for initiating the shield in the tunnel between the underground excavated tunnel concrete structure 6 and the negative ring pipe piece 4 at intervals along the section of the underground excavated tunnel concrete structure 6, and performing tunneling by the shield machine;
specifically, according to the distance between the standard ring of the negative ring pipe sheet and the underground excavated tunnel concrete structure 6, the force unloading block units 1 with proper length are selected for splicing;
after the first ring negative ring pipe piece 4 is assembled, the pipe piece connecting bolt 3 penetrates into a pre-buried bolt hole 41 of the negative ring pipe piece 4, and the end part of the pipe piece connecting bolt 3 far away from the force unloading block unit 1 penetrates out of the pre-buried bolt hole 41 and is fastened with a fastening nut 5; preferably, before the fastening nut 5 is screwed in, a bolt hole sealing ring 32 and a bolt washer 31 are inserted into the end part of the segment connecting bolt 3 to ensure the sealing performance of the pre-embedded bolt hole 41 and avoid the stress concentration between the fastening nut 5 and the negative ring pipe piece 4 to damage the structure of the negative ring pipe piece 4;
after the installation and connection of the splicing counterforce device are finished, the first negative ring pipe piece 4 is pushed out of the shield tail by a propulsion oil cylinder, when the splicing 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 4 and the splicing counterforce device on the surface of the underground excavation tunnel concrete structure 6, mutual adhesion between the first negative ring pipe piece and the splicing counterforce device is ensured, so that the counterforce of forward tunneling of the shield tunneling machine is provided, the shield tunneling machine is ensured to be capable of smoothly pushing forward, and the installation of the next ring pipe piece can be;
after the tunneling of the shield tunneling machine is finished, the fastening bolts 2 are removed, the connection relation between the force unloading block unit 1 closely attached to the underground excavated tunnel concrete structure 6 and the adjacent force unloading block unit 1 is removed, the force unloading block unit 1 closely attached to the underground excavated tunnel concrete structure 6 is removed, finally the pipe piece connecting bolts 5 are drawn out, the force unloading block unit 1 connected with the negative circular pipe piece 4 is removed, and the space between the negative circular pipe piece 4 and the underground excavated tunnel concrete structure 6 is released;
specifically, in the actual construction process, when the shield machine tunnels to 50-60 rings, the negative ring pipe piece 4 can be removed, when the shield machine tunnels, the force-removing block unit 1 adjacent to the underground excavation tunnel concrete structure 6 is removed, the nut on the fastening bolt 2 for fixing the force-removing block unit 1 is unscrewed, so that the connection relation between the adjacent force-removing block units 1 is released, the force-removing block unit 1 closely attached to the underground excavation tunnel concrete structure 1 is removed, specifically, because the opposite end of the force-removing block unit 1 closely attached to the underground excavation tunnel concrete structure 6 is contacted with the adjacent force-removing block unit 1, because the contact area between the adjacent force-removing block units 1 is small, the position between the two force-removing block units 1 can be staggered only by lightly knocking, the force-removing block unit 1 closely attached to the underground excavation tunnel concrete structure is smoothly removed, then sequentially removing the rest of the force-removing block units 1, and finally removing the force-removing block units 1 connected with the negative ring pipe pieces 4;
screwing off the fastening nut 5 on the segment connecting bolt 3, and dismantling the force unloading block unit 1 connected with the negative ring pipe segment 4; specifically, the method further comprises the steps of removing the bolt washer 31 and the bolt hole sealing ring 32; when the splicing counterforce device is detached, the operation is careful, and the components are prevented from sliding off and hurting people;
and (4) removing the negative ring pipe piece.
The utility model discloses an adopt concatenation counterforce device, can convenient and fast ground demolish with the 6 close-fitting power of unloading piece unit 1 of undercut tunnel concrete structure and the power piece unit that unloads of surplus, for demolising of negative ring canal piece 4 provides the space, satisfied the operation condition that negative ring canal piece 4 demolishd, can carry out demolishment smoothly of negative ring canal piece 4, effectively improved the operating efficiency that negative ring canal piece 4 demolishd work.
The present invention has been described in detail with reference to the drawings and the embodiments, and those skilled in the art can make various modifications to the present invention based on the above description. Therefore, certain details of the embodiments should not be construed as limitations of the invention, which are intended to be covered by the following claims.

Claims (5)

1. The utility model provides a shield is originated and is used concatenation counterforce device based on in tunnel, its characterized in that includes:
the outer edges of the butt joint surfaces of the two adjacent force unloading block units are respectively formed with connecting plates, bolt connecting holes are formed in each connecting plate at intervals, and the two adjacent force unloading block units are connected and fastened by penetrating the bolt connecting holes in each connecting plate through fastening bolts;
the first surface of the force unloading block unit, which deviates from the butt joint surface, is fixedly provided with a segment connecting bolt for penetrating and connecting with an embedded bolt hole of a negative ring segment, and the force unloading block unit is provided with a second surface, which deviates from the butt joint surface and is in close contact with a concrete structure of an underground excavated tunnel.
2. The splicing reaction device for initiating a shield in a tunnel according to claim 1, wherein a backing plate is fixed on each of the first surface and the second surface, and the size of each backing plate is larger than that of each of the first surface and the second surface.
3. The splicing counterforce device for shield initiation in a tunnel according to claim 1, wherein a bolt hole sealing ring is further arranged on the segment connecting bolt.
4. The splicing counterforce device for shield initiation in a tunnel according to claim 1, wherein a bolt washer is further arranged on the segment connecting bolt.
5. The splicing counterforce device for shield initiation in a tunnel according to claim 1, wherein the segment connecting bolt is an arc-shaped rod with the same radian as the embedded bolt hole.
CN202020192597.5U 2020-02-21 2020-02-21 Splicing counterforce device for starting shield in tunnel Active CN211777436U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202020192597.5U CN211777436U (en) 2020-02-21 2020-02-21 Splicing counterforce device for starting shield in tunnel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202020192597.5U CN211777436U (en) 2020-02-21 2020-02-21 Splicing counterforce device for starting shield in tunnel

Publications (1)

Publication Number Publication Date
CN211777436U true CN211777436U (en) 2020-10-27

Family

ID=72908444

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202020192597.5U Active CN211777436U (en) 2020-02-21 2020-02-21 Splicing counterforce device for starting shield in tunnel

Country Status (1)

Country Link
CN (1) CN211777436U (en)

Similar Documents

Publication Publication Date Title
WO2018082714A1 (en) Shield tunneling machine for tunnel connecting passageway and connecting passageway tunneling method thereof
CN105971628A (en) Temporary supporting method for tunneled roadway
CN109291257B (en) Method for quickly removing tunnel lining concrete
CN211777436U (en) Splicing counterforce device for starting shield in tunnel
CN107143349B (en) Shield segment capping block assembling device and construction method
CN102817616B (en) A kind of device of soft rock driving and construction method
CN111173524A (en) Splicing counterforce device for starting shield in tunnel and negative ring pipe piece dismantling method
CN105927242A (en) Quick starting device and starting method for miniature TBM (tunnel boring machine) rock tunneling machine
CN108005700B (en) Ultrasonic excitation top coal caving device used in cooperation with hydraulic support and using method thereof
CN108356433A (en) TBM cutterheads and base bearing repair method
CN202560321U (en) Shield fission starting pipe line synchronous move device
CN210483734U (en) Shield starting negative ring
CN107724425B (en) Mechanized construction equipment and construction method for prefabricated comprehensive pipe gallery
CN111236954B (en) Sand box counter-force device for shield initiation in tunnel and negative ring pipe piece dismantling method
CN203669877U (en) Shield tunneling machine starting device with adjustable seal in matched mode
CN108868797B (en) Shield machine host system
CN203223232U (en) Interlocking guiding steel pipe of tunnel pipe shed
CN105221163A (en) A kind of frame for tunnel pipe sheet built and shield machine
CN215110912U (en) Pipe jacking structure for curved pipeline construction
CN211448715U (en) Underground excavation tunnel arch grid mounting tool
CN110726005B (en) System and method for installing field buried pipeline
CN210610245U (en) Mine land reclamation is with device of digging
CN212614721U (en) Shield constructs steel negative ring structure that starts
CN212323581U (en) Movable back rope sleeve part for direct-buried cable pipe
CN213743446U (en) Movable shield steel pipe sheet

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant