CN213684120U - Water-rich sand layer shield starting tunnel portal extension ring device - Google Patents
Water-rich sand layer shield starting tunnel portal extension ring device Download PDFInfo
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- CN213684120U CN213684120U CN202022637388.XU CN202022637388U CN213684120U CN 213684120 U CN213684120 U CN 213684120U CN 202022637388 U CN202022637388 U CN 202022637388U CN 213684120 U CN213684120 U CN 213684120U
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Abstract
The utility model relates to a rich water sand layer shield constructs portal extension ring device that starts, including inlaying the pre-buried steel ring of establishing on the portal terminal surface, can dismantle the fixedly connected with carrier ring on the pre-buried steel ring, carrier ring and the coaxial setting of pre-buried steel ring, from inside to outside fixedly connected with in proper order on the inner wall of carrier ring be used for with first sealing ring, second sealing ring and the third sealing ring of shield structure outer wall butt. When the shield constructs and originates, the shield constructs the machine and passes bearing ring and pre-buried steel ring entering tunnel mouth in proper order, first sealing ring, second sealing ring and third sealing ring all with the outer wall butt of shield structure machine, with the help of first sealing ring, second sealing ring and third sealing ring, can realize the shield structure machine and the tunnel mouth between sealed, and owing to adopt annular seal structure, break away from behind the pre-buried steel ring when the shield constructs the machine, first sealing ring, second sealing ring and third sealing ring still can with the outer wall butt of ring section of jurisdiction, continue to play sealed effect.
Description
Technical Field
The application relates to the field of shield construction technology, in particular to a water-rich sand layer shield starting tunnel portal extension ring device.
Background
The shield method is a construction method for secretly digging a tunnel in a soil layer or a soft rock layer below the earth surface, the shield initiation technology plays a vital role in the whole construction process, the initiation construction operation is the most accident-prone process, and the direct relation is whether the shield tunnel can be smoothly communicated.
The conventional shield starting and arriving technology is a construction technology which adopts measures of treating the end of a tunnel portal before shield tunneling, reinforcing a soft stratum, chiseling the tunnel portal, designing and processing a shield starting and receiving base, positioning and mounting, a supporting system, installing a tunnel portal ring, assembling and disassembling a shield machine and the like, so that shield construction can be guaranteed to be tunneled and arrived according to a design axis of a tunnel.
As the tunnel portal can not be closed when the shield is started, when the shield construction method is carried out under the geological conditions of rich water and sand, the risks of water leakage and sand gushing are higher, and the shield starting accidents are frequent, a device is designed for solving the problems.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem that the tunnel portal cannot be closed in the existing shield method construction, the application provides a water-rich sand layer shield starting tunnel portal extension ring device.
The application provides a shield of rich water sand bed constructs portal extension ring device that starts adopts following technical scheme: the utility model provides a rich water sand layer shield constructs portal extension ring device that starts, is including inlaying the pre-buried steel ring of establishing on the portal terminal surface, can dismantle the fixedly connected with carrier ring on the pre-buried steel ring, carrier ring and the coaxial setting of pre-buried steel ring, fixedly connected with is used for first sealing ring, second sealing ring and the third sealing ring with the shield structure outer wall butt in proper order from inside to outside on the inner wall of carrier ring.
Through adopting above-mentioned technical scheme, when the shield structure was originated, the shield constructs the machine and passes bearing ring and pre-buried steel ring in proper order and get into in the entrance to a cave, first sealing ring, second sealing ring and third sealing ring all with the outer wall butt of shield structure machine, with the help of first sealing ring, second sealing ring and third sealing ring, can realize the shield and construct the sealing between machine and the entrance to a cave, and owing to adopt annular seal structure, after the shield constructs the machine and breaks away from pre-buried steel ring, first sealing ring, second sealing ring and third sealing ring still can with the outer wall butt of ring canal piece, continue to play sealed effect.
Preferably, the bearing ring comprises a sealing plate and annular end plates, the sealing plate is annularly arranged, the annular end plates are arranged on two sides of the sealing plate, the sealing plate and the embedded steel ring are coaxially arranged, and the annular end plates are close to the embedded steel ring and fixedly connected with the embedded steel ring through bolts.
Through adopting above-mentioned technical scheme, through bolt fastening ring shape end plate and pre-buried steel ring, not only can make things convenient for the dismouting, after the construction finishes, with the bolt back of unscrewing, can dismantle the carrier ring from the ring shape end plate to realize the reuse of carrier ring.
Preferably, the peripheral surface of the sealing plate is circumferentially provided with a plurality of stiffening plates in an array manner, and two sides of each stiffening plate are welded and fixed with the corresponding annular end plate.
Through adopting above-mentioned technical scheme, the stiffening plate can effectively improve the joint strength between shrouding and the ring end plate, and then improves the structural strength of whole carrier ring.
Preferably, the circumference array is equipped with a plurality of slip casting pipes on the shrouding, first sealing ring and second sealing ring set up respectively in the slip casting pipe both sides.
By adopting the technical scheme, the sealing grease is injected into the grease cavity through the grouting pipe, so that the sealing performance of the portal is further improved.
Preferably, the first sealing ring and the second sealing ring are steel wire brush rings, and the steel wire brush rings are welded and fixed with the bearing ring.
Through adopting above-mentioned technical scheme, adopt the steel wire brush ring as first sealing ring and second sealing ring, the wear resistance of steel wire brush ring is good, can effectively improve the life of first sealing ring and second sealing ring.
Preferably, the third sealing ring comprises a rubber curtain arranged on an annular end plate far away from the embedded steel ring, the rubber curtain is arranged annularly, a plurality of pressing plates are arranged on the annular end plate in a circumferential array mode and located on the outer side of the rubber curtain, and the pressing plates are fixedly connected with the annular end plate through bolts.
Through adopting above-mentioned technical scheme, the rubber curtain is chooseed for use to the third sealing ring, because can adopt flexible sealing connection's mode between rubber curtain and the shield structure machine, can effectively improve the leakproofness between shield structure machine and the carrier ring, adopts the clamp plate to realize the fixed of rubber curtain, and the dismantlement and the installation of rubber curtain are very convenient.
Preferably, the pressing plate is rotatably connected with a hinge capable of abutting against the outer wall of the shield machine, and the hinge is arranged outside the rubber curtain.
By adopting the technical scheme, the loose-leaf can protect and support the rubber curtain, so that the sealing performance between the rubber curtain and the shield tunneling machine can be ensured, and the service life of the rubber curtain can be prolonged.
Preferably, one end of the loose leaf, which is far away from the pressing plate, is provided with a rubber pad which is used for being abutted against the outer wall of the shield machine, and the rubber pad is detachably connected with the loose leaf.
Through adopting above-mentioned technical scheme, the rubber pad can with the shield constructs the outer wall butt of machine, not only can reduce the wearing and tearing of shield structure machine, can improve the leakproofness between shield structure machine and the loose-leaf simultaneously.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the steel plate, the rubber curtain and the steel wire brush ring are processed, so that the tunnel shield is mounted on site and convenient to transport, the sealing effect of a tunnel portal in the shield starting process can be effectively improved, and the water burst and sand burst risks in the shield starting process are greatly reduced;
2. after the shield machine breaks away from the pre-buried steel ring, the first sealing ring, the second sealing ring and the third sealing ring still can be abutted against the outer wall of the ring pipe piece, and the sealing effect is continuously achieved.
Drawings
Fig. 1 is a schematic view of an overall installation structure of an embodiment of the present application.
Fig. 2 is an installation schematic diagram of an embedded steel ring according to an embodiment of the present application.
FIG. 3 is a schematic view of a load ring installation of an embodiment of the present application.
FIG. 4 is a vertical assembly cross-sectional view of a load ring according to an embodiment of the present application.
Description of reference numerals: 1. a tunnel portal; 2. pre-burying a steel ring; 3. a load ring; 31. closing the plate; 32. an annular end plate; 4. a stiffening plate; 5. a grouting pipe; 51. a grease cavity; 6. a first seal ring; 7. a second seal ring; 8. a rubber curtain; 9. pressing a plate; 91. loose leaves; 911. and (7) a rubber pad.
Detailed Description
The present application is described in further detail below with reference to figures 1-4.
The embodiment of the application discloses a shield of rich water sand bed starts portal extension ring device. Referring to fig. 1 and 2, rich water sand layer shield constructs 1 extension ring device in portal that starts is including inlaying pre-buried steel ring 2 of establishing on portal 1 terminal surface, pre-buried steel ring 2 sets up around portal 1, can dismantle fixedly connected with carrier ring 3 on pre-buried steel ring 2, carrier ring 3 sets up with pre-buried steel ring 2 with the axle center, the first sealing ring of fixedly connected with 6 on the inner wall of carrier ring 3, second sealing ring 7 and third sealing ring, first sealing ring 6, second sealing ring 7 and third sealing ring set gradually from inside to outside along portal 1 opening direction, and be inboard near portal 1 one end.
When the shield starts, refer to fig. 1 and 2, the shield constructs the machine and passes carrier ring 3 and pre-buried steel ring 2 in proper order and get into in the entrance to a cave, first sealing ring 6, second sealing ring 7 and third sealing ring all with the outer wall butt of shield structure machine, with the help of first sealing ring 6, second sealing ring 7 and third sealing ring, can realize the seal between shield structure machine and the entrance to a cave, and owing to adopt annular seal structure, after the shield constructs the machine and breaks away from pre-buried steel ring 2, first sealing ring 6, second sealing ring 7 and third sealing ring still can with the outer wall butt of ring canal piece, continue to play sealed effect.
Referring to fig. 3 and 4, for conveniently realizing the installation of carrier ring 3, carrier ring 3 is including being shrouding 31 that the annular set up and setting up the annular end plate 32 in shrouding 31 both sides, and the internal diameter of shrouding 31 equals with pre-buried steel ring 2's internal diameter, and annular end plate 32 symmetry sets up in the outside of shrouding 31, and annular end plate 32 is fixed through welding mode with shrouding 31, has preset the bolt hole on pre-buried steel ring 2, and the annular end plate 32 that is close to pre-buried steel ring 2 passes through bolt fixed connection with pre-buried steel ring 2. Not only can make things convenient for the dismouting, after the construction finishes, unscrew the bolt, can dismantle the carrier ring 3 from annular end plate 32 to realize the reuse of carrier ring 3.
In addition, for easy to assemble, whole carrier ring 3 comprises four the same fan-shaped annular components, and when the installation, the installation concatenation is on pre-buried steel ring 2 in proper order to form carrier ring 3, the installation and dismantle very conveniently.
Referring to fig. 3 and 4, in order to improve the structural strength of the carrier ring 3, a plurality of stiffening plates 4 are circumferentially arranged on the outer circumferential surface of the sealing plate 31 in an array manner, and both sides of the stiffening plates 4 are fixed to the corresponding annular end plates 32 in a welding manner.
Referring to fig. 3 and 4, in order to facilitate the filling of the sealing grease between the first sealing ring 6 and the second sealing ring 7, a plurality of grouting pipes 5 are circumferentially arranged on the sealing plate 31 in an array manner, the first sealing ring 6 and the second sealing ring 7 are respectively arranged on two sides of each grouting pipe 5, the number of the grouting pipes 5 is 12, and the circumferential array is arranged on the outer circumferential surface of the sealing plate 31. During the construction, shield constructs quick-witted outer wall and first sealing ring 6 and the 7 butt of second sealing ring, forms grease chamber 51 between first sealing ring 6, second sealing ring 7, shield structure machine and the shrouding 31, and slip casting pipe 5 and grease chamber 51 intercommunication inject sealed grease through slip casting pipe 5 in to grease chamber 51 to further improve the sealing performance of portal 1 department.
In this implementation, refer to fig. 3 and 4, first sealing ring 6 and second sealing ring 7 adopt the steel wire brush ring, the steel wire brush ring is through welding mode and shrouding 31 fixed connection, two steel wire brush rings all are the toper setting and towards the inside slope of portal 1, set the similar barb structure of slope with the steel wire brush ring, effectively improve the bearing capacity of steel wire brush ring, the sealing performance of first sealing ring 6 and second sealing ring 7 has been improved, simultaneously because steel wire brush ring wear resistance is good, can effectively improve the life of first sealing ring 6 and second sealing ring 7.
Referring to fig. 3 and 4, in order to reduce the width of the sealing plate 31 and reduce the weight, in this embodiment, the first sealing ring 6 may be fixed on the inner wall of the hole by bolts, the second sealing ring 7 may be fixed on the second sealing ring 7 by a wire brush ring, and the grouting pipe 5 is still disposed on the sealing plate 31 and located between the first sealing ring 6 and the second sealing ring 7.
Referring to fig. 3 and 4, the third sealing ring includes the rubber curtain 8 disposed on the ring-shaped end plate 32, the rubber curtain 8 is fixedly connected to the ring-shaped end plate 32 far away from the opening, the rubber curtain 8 is disposed annularly, the inner diameter of the rubber curtain 8 is smaller than the outer diameter of the shield machine, for convenient realization of the fixed connection between the rubber curtain 8 and the ring-shaped end plate 32, a pressing plate 9 is disposed on the ring-shaped end plate 32 corresponding to the rubber curtain 8, the pressing plate 9 is disposed outside the rubber curtain 8, the stud bolt on the pressing plate 9 penetrates through the pressing plate 9, the rubber curtain 8 and the ring-shaped end plate 32, through nuts disposed at two ends of the stud bolt, the rubber curtain 8 is pressed and fixed, the installation and the disassembly are very.
Referring to fig. 3 and 4, a hinge 91 is rotatably connected to the pressure plate 9 and can be in contact with the outer wall of the shield machine, the rotational axis of the hinge 91 is perpendicular to the longitudinal direction of the opening, and the hinge 91 is disposed outside the rubber curtain 8 and covers the rubber curtain 8. The hinge 91 is made of rigid material, and the hinge 91 can protect and support the rubber curtain 8, so that the sealing performance between the rubber curtain 8 and the shield tunneling machine can be ensured, and the service life of the rubber curtain 8 can be prolonged.
Referring to fig. 3 and 4, a rubber pad 911 for abutting against the outer wall of the shield machine is arranged at one end of the hinge 91 away from the pressing plate 9, the rubber pad 911 is detachably connected with the hinge 91 in an adhesion mode, the length of the rubber pad 911 is equal to the width of the hinge 91, and the rubber pad 911 abuts against the outer wall of the shield machine during construction.
The implementation principle of the shield launching portal extension ring device for the water-rich sand layer in the embodiment of the application is as follows: before starting construction, a bearing ring 3 is fixed on an embedded steel ring 2 through bolts, then a steel wire brush ring is welded on a sealing plate 31, and finally a rubber curtain and a pressing plate 9 are installed; during starting construction, the shield machine enters the bearing ring 3, the outer wall of the shield machine is sequentially abutted against the loose leaf 91, the rubber curtain and the two steel wire brush rings, and meanwhile, sealing grease is injected into the grease cavity 51 through the grouting pipe 5, so that sealing of the starting tunnel portal 1 is realized.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (8)
1. The utility model provides a rich water sand bed shield constructs portal extension ring device that starts which characterized in that: including inlaying pre-buried steel ring (2) of establishing on portal (1) terminal surface, can dismantle fixedly connected with carrier ring (3) on pre-buried steel ring (2), carrier ring (3) and pre-buried steel ring (2) coaxial setting, fixedly connected with is used for first sealing ring (6), second sealing ring (7) and the third sealing ring with the shield structure outer wall butt in proper order from inside to outside on the inner wall of carrier ring (3).
2. The water-rich sand layer shield launching portal extension ring device as recited in claim 1, wherein: bear ring (3) including being shrouding (31) that the annular set up and setting up annular end plate (32) in shrouding (31) both sides, shrouding (31) and the coaxial setting of pre-buried steel ring (2), are close to annular end plate (32) and pre-buried steel ring (2) of pre-buried steel ring (2) pass through bolt fixed connection.
3. The water-rich sand layer shield launching portal extension ring device as recited in claim 2, wherein: the periphery of the outer peripheral surface of the sealing plate (31) is circumferentially provided with a plurality of stiffening plates (4), and two sides of each stiffening plate (4) are welded and fixed with the corresponding annular end plate (32).
4. The water-rich sand layer shield launching portal extension ring device as recited in claim 2 or 3, wherein: the circumference array is equipped with a plurality of slip casting pipes (5) on shrouding (31), first sealing ring (6) and second sealing ring (7) set up respectively in slip casting pipe (5) both sides.
5. The water-rich sand layer shield launching portal extension ring device as recited in claim 2, wherein: the first sealing ring (6) and the second sealing ring (7) are steel wire brush rings, and the steel wire brush rings are welded and fixed with the bearing ring (3).
6. The water-rich sand layer shield launching portal extension ring device as recited in claim 2 or 5, wherein: the third sealing ring comprises a rubber curtain (8) arranged on an annular end plate (32) far away from the embedded steel ring (2), the rubber curtain (8) is arranged in an annular mode, a plurality of pressing plates (9) are arranged on the annular end plate (32) in a circumferential array mode, the pressing plates (9) are located on the outer side of the rubber curtain (8), and the pressing plates (9) are fixedly connected with the annular end plate (32) through bolts.
7. The water-rich sand layer shield launching portal extension ring device as recited in claim 6, wherein: the pressing plate (9) is rotatably connected with a hinge (91) capable of being abutted to the outer wall of the shield machine, and the hinge (91) is arranged on the outer side of the rubber curtain (8).
8. The water-rich sand layer shield launching portal extension ring device as recited in claim 7, wherein: one end, far away from the pressing plate (9), of the hinge (91) is provided with a rubber pad (911) used for being abutted against the outer wall of the shield machine, and the rubber pad (911) is detachably connected with the hinge (91).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022637388.XU CN213684120U (en) | 2020-11-13 | 2020-11-13 | Water-rich sand layer shield starting tunnel portal extension ring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022637388.XU CN213684120U (en) | 2020-11-13 | 2020-11-13 | Water-rich sand layer shield starting tunnel portal extension ring device |
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| CN213684120U true CN213684120U (en) | 2021-07-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202022637388.XU Active CN213684120U (en) | 2020-11-13 | 2020-11-13 | Water-rich sand layer shield starting tunnel portal extension ring device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113803078A (en) * | 2021-09-18 | 2021-12-17 | 中铁十四局集团大盾构工程有限公司 | Shield receiving external tunnel portal device and shield receiving process |
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2020
- 2020-11-13 CN CN202022637388.XU patent/CN213684120U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113803078A (en) * | 2021-09-18 | 2021-12-17 | 中铁十四局集团大盾构工程有限公司 | Shield receiving external tunnel portal device and shield receiving process |
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