CN220081439U - Radial reinforcing system for shield tunnel penetrating through water area - Google Patents
Radial reinforcing system for shield tunnel penetrating through water area Download PDFInfo
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- CN220081439U CN220081439U CN202320877030.5U CN202320877030U CN220081439U CN 220081439 U CN220081439 U CN 220081439U CN 202320877030 U CN202320877030 U CN 202320877030U CN 220081439 U CN220081439 U CN 220081439U
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- 230000003014 reinforcing effect Effects 0.000 title claims abstract description 62
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 51
- 230000000149 penetrating effect Effects 0.000 title claims abstract description 15
- 238000007789 sealing Methods 0.000 claims abstract description 71
- 239000002689 soil Substances 0.000 claims abstract description 25
- 230000002787 reinforcement Effects 0.000 claims abstract description 21
- 239000004568 cement Substances 0.000 claims abstract description 15
- 238000000034 method Methods 0.000 claims abstract description 9
- 230000008569 process Effects 0.000 claims abstract description 8
- 239000002002 slurry Substances 0.000 claims description 16
- 230000000903 blocking effect Effects 0.000 claims description 14
- 230000005641 tunneling Effects 0.000 abstract description 12
- 229920006395 saturated elastomer Polymers 0.000 abstract description 6
- 238000010276 construction Methods 0.000 description 6
- 235000019353 potassium silicate Nutrition 0.000 description 4
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000011112 process operation Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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- Lining And Supports For Tunnels (AREA)
Abstract
The utility model discloses a radial reinforcing system for a shield tunnel penetrating through a water area, which comprises the following components: the radial reinforcing devices of multiunit, multiunit radial reinforcing device are the ring group setting of interval in proper order in the extending direction of tunnel, and each ring group includes the radial reinforcing device of multiunit that sets up along the circumference of section of jurisdiction interval in proper order. The overhanging ends of the radial reinforcing devices extend out of the back surface of the duct piece, and the opposite embedded ends penetrate through the duct piece in the radial direction and then extend into soil behind the duct piece wall. The radial reinforcing device is arranged in a sealing way so as to prevent water from entering the tunnel in grouting reinforcement, is used for injecting cement paste into soil body after the pipe piece wall in grouting reinforcement, and is used for sealing the pipe and dismantling the overhanging end after grouting end. The system can effectively reduce the influence on the ground surface subsidence in the shield tunneling process in the saturated soft loess stratum, has stable integral structure, can reduce the movement of the shield segments, and remarkably improves the quality of the formed tunnel.
Description
Technical Field
The utility model relates to the technical field of tunnel construction, in particular to a radial reinforcing system for a shield tunnel penetrating through a water area.
Background
Along with the accelerated development of urban rail transit in China, the shield method is also increasingly widely applied to urban subway tunnel construction, and more cases of shield crossing water areas such as rivers, lakes and the like are provided. When the earth pressure balance shield passes through a water area, particularly under the conditions of complex geological conditions and important buildings, stratum disturbance and subsidence deformation of the earth surface buildings need to be strictly controlled while smooth tunneling of the shield machine is ensured.
In the prior art, the earth surface subsidence is difficult to control only by means of synchronous grouting and secondary grouting in the tunneling process, and therefore reliable measures are needed to be taken for reinforcing soil around the shield tunnel.
In view of the foregoing, it is desirable to provide a shield reinforcing apparatus for a saturated soft loess tunnel, so as to reduce the influence of damage to a surface building caused by overlarge surface subsidence caused by tunneling of a saturated soft loess stratum.
Disclosure of Invention
The utility model provides a radial reinforcing system for a shield tunnel penetrating through a water area, which aims to solve the technical problem that the ground surface settlement is difficult to control only by means of synchronous grouting and secondary grouting in a tunneling process in the prior art.
The technical scheme adopted by the utility model is as follows:
a shield tunnel radial reinforcement system across a body of water, comprising: the radial reinforcing devices are sequentially arranged at intervals in the extending direction of the tunnel, and each annular group comprises a plurality of radial reinforcing devices which are sequentially arranged at intervals along the circumferential direction of the duct piece; the overhanging ends of the radial reinforcing devices extend out of the back surface of the pipe piece and are used for being connected with grouting equipment and pipe sealing equipment, the opposite embedded ends penetrate through the pipe piece in the radial direction and then extend into soil body behind the pipe piece wall, and the radial reinforcing devices are fixedly connected with the pipe piece into a whole when penetrating through the pipe piece; the radial reinforcing device is arranged in a sealing way so as to prevent water from entering the tunnel in grouting reinforcement, is used for injecting cement paste into soil body after the pipe piece wall in grouting reinforcement, and is used for sealing the pipe and dismantling the overhanging end after grouting end.
Further, the radial reinforcing device comprises a reserved grouting pipe pre-buried in the duct piece, a temporary closed pipe group which plays a role in guiding and sealing the pipe, and a grouting guide pipe for guiding cement slurry; the reserved grouting pipe is arranged along the radial extension of the pipe piece; the embedded end of the temporary closed tube group is connected with a reserved grouting tube, and the opposite overhanging end of the reserved grouting tube extends out of the back surface of the tube sheet; the grouting guide pipe sequentially penetrates through the temporary closed pipe group, the reserved grouting pipe and the soil body after the pipe piece wall is stretched into the pipe piece wall along the axial direction of the temporary closed pipe group, and the overhanging end of the grouting guide pipe is sealed to stretch out of the temporary closed pipe group so as to be used for being connected with grouting equipment and pipe sealing equipment.
Further, the reserved grouting pipe is hollow and tubular, and is pre-buried in the pipe piece when the pipe piece is manufactured; the inner wall surface of the reserved grouting pipe is also provided with an internal thread for detachable connection with the temporary closed pipe group.
Further, an opening is reserved at the outer extending end of the grouting pipe and extends to be flush with the back surface of the pipe piece; the opposite embedded ends of the reserved grouting pipe are sealed through the first sealing piece which can be pierced, so that after the grouting pipe pierces the first sealing piece, water burst is prevented from entering the reserved grouting pipe, and the embedded ends of the reserved grouting pipe do not extend out of the pipe piece.
Further, the temporary closed pipe group comprises a blocking head with a limit flange, a sealing gasket and a water-swelling piece which are arranged on the outer circle of the embedded end of the blocking head, and a second sealing piece which is arranged at the overhanging end of the blocking head; the blocking head is hollow and tubular, and the embedded end of the blocking head extends into the reserved grouting pipe from an opening of the reserved grouting pipe and is in threaded connection with the reserved grouting pipe; the sealing gasket and the water-swelling sheet are pressed on the opening end of the reserved grouting pipe through the limit flange so as to prevent water from flowing into the tunnel from a gap between the reserved grouting pipe and the plugging head; the second sealing piece is used for sealing the opening of the reserved grouting pipe before the grouting pipe is not inserted, and preventing water from flowing into the tunnel from a gap between the plugging head and the grouting pipe after the grouting pipe is punctured.
Further, the opening end of the reserved grouting pipe is concaved inwards to form a countersunk groove; the water-swelling sheet and the sealing gasket are limited between the limit flange and the bottom surface of the countersunk groove.
Further, an external thread is further processed on the outer circle of the overhanging end of the plugging head, so that the sealing head is used for sealing water after being in threaded connection with a sealing valve with a sealing function when water gushes.
Further, the grouting guide pipe is hollow and tubular, the embedded end of the grouting guide pipe is conical so as to be used for splitting soil bodies and reducing jacking resistance, and the opposite overhanging end of the grouting guide pipe extends out of the temporary closed pipe group so as to be connected with external grouting equipment and hole sealing equipment; the grouting conduit is provided with grouting holes for the slurry to overflow.
Further, the grouting guide pipe comprises a jacking guide pipe, a standard section guide pipe and a tail guide pipe which are sequentially arranged and communicated from the embedded end to the overhanging end; the jacking guide pipe is detachably connected with the standard section guide pipe and the standard section guide pipe is detachably connected with the tail guide pipe through a thread structure.
Further, the outer circular surface of the grouting guide pipe is concavely formed into a stepped pipe in a section in the length direction; the grouting holes are formed in the concave sections of the stepped pipes, and water stops are further wound on the outer circles of the concave sections and used for preventing external sundries from entering the inside through the grouting holes in the jacking process of the grouting guide pipes.
The utility model has the following beneficial effects:
the utility model provides a radial reinforcing system for a saturated soft loess tunnel shield tunnel penetrating through a water area, which comprises a plurality of groups of radial reinforcing devices, wherein the plurality of groups of radial reinforcing devices are sequentially arranged in a ring group at intervals in the extending direction of the tunnel, and each ring group comprises the plurality of groups of radial reinforcing devices sequentially arranged at intervals along the circumferential direction of a segment; when the shield tunneling machine is used, after shield tunneling is completed through segment assembly, a radial reinforcing device is used for reinforcing soil mass in a certain range outside the shield segment, so that the influence of the shield tunneling on earth surface subsidence is effectively reduced; on the other hand, in the system, the radial reinforcing device is fixedly connected with the pipe piece into a whole when penetrating the pipe piece, and after grouting processing is completed, only the overhanging end of the radial reinforcing device is removed, and the rest part of the radial reinforcing device is reserved in the pipe piece and soil behind the wall of the pipe piece, so that the system has a stable whole structure, good reinforcing effect on the soil behind the wall, plays a role of supporting a framework, reduces the movement of the shield pipe piece, and further remarkably improves the quality of a formed tunnel; in addition, radial reinforcing apparatus seals the setting, still can be used to prevent in grouting reinforcement that the water from entering the tunnel, further improves the security of tunnel construction.
In addition to the objects, features and advantages described above, the present utility model has other objects, features and advantages. The present utility model will be described in further detail with reference to the drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:
FIG. 1 is a schematic diagram of a front view of a radial reinforcement system for shield tunnels across a body of water in accordance with a preferred embodiment of the present utility model;
FIG. 2 is a schematic diagram of a front view of the reserved grouting pipe in FIG. 1;
fig. 3 is a schematic view of an installation structure of the reserved grouting pipe in the pipe piece in fig. 1;
FIG. 4 is a schematic view of the main structure of the temporary closed tube set of FIG. 1;
FIG. 5 is a schematic view of the front view of the jacking conduit of FIG. 1;
FIG. 6 is a schematic view of the front view of the standard joint conduit of FIG. 1;
fig. 7 is a schematic diagram of the front view of the tail catheter of fig. 1.
Description of the drawings
10. A segment; 20. reserving a grouting pipe; 201. a countersunk head groove; 30. temporarily closing the tube group; 31. a blocking head; 311. a limit flange; 32. a sealing gasket; 33. a water-swellable sheet; 34. a second sealing sheet; 40. grouting guide pipe; 401. grouting holes; 41. jacking the guide pipe; 42. a standard joint conduit; 43. a tail catheter; 50. a first sealing sheet.
Detailed Description
Embodiments of the utility model are described in detail below with reference to the attached drawing figures, but the utility model can be practiced in a number of different ways, as defined and covered below.
Referring to fig. 1, a preferred embodiment of the present utility model provides a radial reinforcement system for a shield tunnel crossing a water area, comprising: the radial reinforcing devices of multiunit, multiunit radial reinforcing device is the ring group setting of interval in proper order in the extending direction of tunnel, and each ring group includes the radial reinforcing device of multiunit that sets up along the circumference of section of jurisdiction 10 interval in proper order. The overhanging ends of the radial reinforcing devices extend out of the back surface of the pipe segment 10 and are used for being connected with grouting equipment and pipe sealing equipment, the opposite embedded ends of the radial reinforcing devices penetrate through the pipe segment 10 along the radial direction and then extend into soil body behind the wall of the pipe segment 10, and the radial reinforcing devices are fixedly connected with the pipe segment 10 into a whole when penetrating through the pipe segment 10. The radial reinforcing device is arranged in a sealing way so as to prevent water from entering the tunnel in grouting reinforcement, is used for injecting cement slurry into soil body behind the wall of the duct piece 10 in grouting reinforcement, and is used for sealing the pipe and dismantling the overhanging end after grouting is finished.
The utility model provides a radial reinforcing system for a saturated soft loess tunnel shield tunnel penetrating through a water area, which comprises a plurality of groups of radial reinforcing devices, wherein the plurality of groups of radial reinforcing devices are sequentially arranged in a ring group at intervals in the extending direction of the tunnel, and each ring group comprises the plurality of groups of radial reinforcing devices sequentially arranged at intervals along the circumferential direction of a segment 10; when the shield tunneling machine is used, after shield tunneling is completed through segment assembly, a radial reinforcing device is used for reinforcing soil mass in a certain range outside the shield segment, so that the influence of the shield tunneling on earth surface subsidence is effectively reduced; on the other hand, in the system, the radial reinforcing device is fixedly connected with the pipe piece 10 into a whole when penetrating through the pipe piece 10, and after grouting processing is finished, only the overhanging end of the radial reinforcing device is removed, and the rest part of the radial reinforcing device is reserved in the pipe piece 10 and soil behind the wall of the pipe piece, so that the system has a stable whole structure, good reinforcing effect on the soil behind the wall, plays a role of supporting a framework, reduces the movement of the shield pipe piece 10, and further remarkably improves the quality of a formed tunnel; in addition, radial reinforcing apparatus seals the setting, still can be used to prevent in grouting reinforcement that the water from entering the tunnel, further improves the security of tunnel construction.
Optionally, as shown in fig. 1, the radial reinforcement device includes a reserved grouting pipe 20 pre-buried in the pipe sheet 10, a temporary closed pipe group 30 functioning as a guide and a pipe sealing, and a grouting guide pipe 40 for guiding cement slurry. The preformed grouting pipes 20 are arranged along the radial extension of the pipe piece 10. The embedded end of the temporary closed tube group 30 is connected with the reserved grouting tube 20, and the opposite overhanging end extends out of the back surface of the tube sheet 10. The grouting conduit 40 sequentially penetrates through the temporary closed pipe group 30, the reserved grouting pipe 20 and the pipe piece 10 along the axial direction of the temporary closed pipe group 30 and then stretches into soil body behind the wall of the pipe piece 10, and the overhanging end of the grouting conduit 40 stretches out of the temporary closed pipe group 30 in a sealing manner so as to be used for being connected with grouting equipment and pipe sealing equipment.
In the alternative scheme, as shown in fig. 2, the reserved grouting pipe 20 is hollow and is pre-buried in the pipe piece 10 when the pipe piece 10 is manufactured, so that a radial reinforcing system and the pipe piece 10 are connected into a whole, the stability of the structure is enhanced, the influence of shield tunneling on earth surface subsidence is effectively reduced, the movement of the shield pipe piece 10 can be reduced, and the quality of a formed tunnel is remarkably improved; in actual design, the reserved grouting pipe 20 is embedded in the pipe piece 10 during manufacturing of the pipe piece 10, and is poured simultaneously with concrete of the pipe piece 10. The inner wall surface of the reserved grouting pipe 20 is also provided with internal threads for detachable connection with the temporary closed pipe group 30, so that the temporary closed pipe group 30 can be quickly removed after grouting is finished.
In this alternative, as shown in fig. 3, the overhanging end of the pre-grouting pipe 20 is opened and extends to be flush with the back surface of the pipe sheet 10. The opposite embedded end of the preformed grouting pipe 20 is closed by a first sealing piece 50 which can be pierced, so as to prevent water from entering the preformed grouting pipe 20 after the grouting pipe 40 pierces the first sealing piece 50, and the embedded end of the preformed grouting pipe 20 does not extend out of the pipe piece 10. In actual design, the reserved grouting pipe 20 is installed along the thickness direction of the pipe piece 10, and the length is shorter than 30mm of the thickness of the pipe piece 10.
In this alternative, as shown in fig. 4, the temporary closed tube group 30 includes a blocking head 31 with a limiting flange 311, a sealing gasket 32 and a water-swellable sheet 33 mounted on the outer circle of the inner end of the blocking head 31, and a second sealing sheet 34 disposed on the outer end of the blocking head 31. The blocking head 31 is hollow and tubular, and its embedded end extends into the reserved grouting pipe 20 from the opening of the reserved grouting pipe 20 and is in threaded connection with the reserved grouting pipe 20. The sealing gasket 32 and the water-swellable sheet 33 are pressed against the open end of the preformed grouting pipe 20 by the limiting flange 311 for preventing water from flowing into the tunnel from the gap between the preformed grouting pipe 20 and the plugging head 31. The second sealing piece 34 is used for sealing the opening of the reserved grouting pipe 20 before the grouting guide pipe 40 is not inserted, and is used for preventing water from flowing into the tunnel from the gap between the plugging head 31 and the grouting guide pipe 40 after the grouting guide pipe 40 is punctured.
In this alternative, as shown in fig. 2 and 4, the open end of the preformed grouting pipe 20 is concave inward to form a countersunk groove 201. The water-swellable sheet 33 and the sealing gasket 32 are limited between the limit flange 311 and the bottom surface of the countersunk groove 201.
In this alternative, as shown in fig. 4, an external thread is further processed on the outer circle of the overhanging end of the plugging head 31, so as to be used for sealing off water after being in threaded connection with a sealing valve with sealing function in water gushing, and if water gushing occurs, a sealing ball valve is immediately installed for sealing.
Alternatively, as shown in fig. 1, the grouting guide 40 has a hollow tubular shape with its embedded end tapered for splitting the soil body, reducing the jacking resistance, and its opposite overhanging end extending beyond the temporary closed tube set 30 for connection to external grouting equipment and hole sealing equipment. The grouting pipe 40 is provided with grouting holes 401 for the slurry to overflow.
In this alternative, as shown in fig. 5-7, the grouting conduit 40 includes a jacking conduit 41, a standard joint conduit 42 and a tail conduit 43 which are sequentially arranged and communicated from the embedded end to the overhanging end. The jacking guide pipe 41 and the standard joint guide pipe 42, and the standard joint guide pipe 42 and the tail guide pipe 43 are detachably connected through screw thread structures. In actual use, the grouting guide pipe 40 firstly pierces the second sealing piece 34 along one end of the plugging head 31 by using the jacking guide pipe 41, reserves the first sealing piece 50 on the grouting pipe 20, then enters the soil body behind the wall of the pipe segment 10, then continues to extend by using the standard joint guide pipe 42, and finally performs grouting by using the tail guide pipe 43. The structure of the grouting guide pipe 40 is convenient for the jacking process of the grouting guide pipe 40 to be lengthened gradually, so that time and labor are saved during operation, and the jacking precision of the grouting guide pipe 40 is high and the path is accurate.
In this alternative, as shown in fig. 5-7, the outer circumferential surface of the grouting guide 40 is stepped in its length direction with a stepped pipe concave inward. The grouting holes 401 are formed in the concave sections of the stepped pipe, and water stops are further wound on the outer circles of the concave sections, so that external sundries can be prevented from entering the grouting holes 401 during the jacking process of the grouting guide pipe 40.
In the utility model, the grouting slurry is cement slurry with a water-cement ratio of 1:1, and the water-cement ratio can be adjusted according to actual conditions. The overhanging end of the tail conduit 43 is connected with a three-way pipe, the three-way pipe is also respectively connected with grouting equipment and pipe sealing equipment, the grouting equipment is connected with a pressure gauge, and grouting pressure is controlled; grouting pressure is obtained according to a field test, the grouting is controlled by adopting cement square quantity and grouting pressure double indexes, after grouting is completed, a water glass valve on a three-way valve is opened, double-liquid slurry is used for plugging, and cement is used for plugging: the water glass is 1:1.
The construction steps of the system of the utility model are as follows:
step S1, reserving a plurality of reserved grouting pipes 20 on each shield segment, and grouting behind the segment 10 wall through grouting pipes 40 after the shield segment is assembled and the shield tail is separated;
step S2, before radial reinforcement is prepared, a temporary closed tube group 30 is installed on the open end of the reserved grouting pipe 20. Specifically, a sealing gasket 32 and a water swelling piece 33 are sequentially arranged at the tail end of a plugging head 31, and then the plugging head 31 is screwed into a reserved grouting pipe 20 for tightening; further, a second sealing piece 34 made of rubber is stuck to the other end of the plugging head 31, and the second sealing piece 34 is used for sealing a grouting opening of the plugging head 31 so as to fill a gap between the grouting pipe 40 and an inner pipe of the plugging head 31 when the grouting pipe 40 is jacked in, thereby preventing the plugging head 31 from water burst;
step S3, penetrating the jacking guide pipe 41 along the plugging head 31 and penetrating the second sealing piece 34 into the reserved grouting pipe 20; the blocking head 31 plays a fixed guiding role, and continuously pushes the grouting guide pipe 40 to break through the first sealing piece 50 on the reserved grouting pipe 20 and the concrete protection layer wall of the duct piece 10 to reach the soil body;
step S4, connecting a standard joint guide pipe 42 at the outer extending end of the jacking guide pipe 41, continuously jacking after tight connection, and finally jacking the standard joint guide pipe 42 to a specified depth by using a tail guide pipe 43;
and S5, after jacking to a specified depth, connecting a three-way valve at the tail end of the tail guide pipe 43, starting to cement slurry, and enabling the slurry to break through a water stop belt outside a grouting hole under the action of grouting pressure, and entering a soil body, wherein the grouting pressure is 2-4bar, and the grouting diffusion radius is 2m. The grouting quantity and the grouting pressure are controlled by double indexes, when the grouting quantity reaches a calculated value and the pressure gauge pressure reaches a design value, grouting cement slurry is stopped, a three-way water glass valve is opened, grouting holes are plugged by double grouting, and cement slurry is filled: the water glass is 1:1.
And S6, after the double-slurry plugging is completed, cutting off the tail guide pipe 43 after the slurry is completely solidified, removing the temporary closed pipe group 30, and filling fine stone concrete into the grouting hole as a final hole sealing.
As can be seen from the above construction steps, the radial reinforcing system for the saturated soft loess stratum shield tunnel penetrating through the water area has the advantages of simple structural arrangement, simple and convenient process operation, strong feasibility, good reinforcing effect on the soil body behind the wall, and the phenomenon that the groundwater is gushed out behind the wall is avoided in the jacking and grouting reinforcing processes of the grouting guide pipe 40.
The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (10)
1. A radial shield tunnel crossing water area reinforcing system, comprising:
the radial reinforcing devices are sequentially arranged at intervals in the extending direction of the tunnel, and each annular group comprises a plurality of radial reinforcing devices sequentially arranged at intervals along the circumferential direction of the duct piece (10);
the overhanging ends of the radial reinforcing devices extend out of the back surface of the pipe piece (10) and are used for being connected with grouting equipment and pipe sealing equipment, the opposite embedded ends of the radial reinforcing devices penetrate through the pipe piece (10) along the radial direction and then extend into soil body behind the wall of the pipe piece (10), and the radial reinforcing devices are fixedly connected with the pipe piece (10) into a whole when penetrating through the pipe piece (10);
the radial reinforcing device is arranged in a sealing way so as to prevent water from entering the tunnel in grouting reinforcement, is used for injecting cement paste into soil body behind the wall of the duct piece (10) in grouting reinforcement, and is used for sealing the pipe and dismantling the overhanging end after grouting is finished.
2. The radial reinforcement system for shield tunnel crossing water area according to claim 1,
the radial reinforcement device comprises a reserved grouting pipe (20) pre-buried in the pipe piece (10), a temporary closed pipe group (30) which plays a role in guiding and sealing the pipe, and a grouting guide pipe (40) for guiding cement slurry;
the reserved grouting pipe (20) is arranged along the radial extension of the duct piece (10);
the embedded end of the temporary closed tube group (30) is connected with a reserved grouting tube (20), and the opposite overhanging end of the reserved grouting tube extends out of the back surface of the tube sheet (10);
the grouting guide pipe (40) sequentially penetrates through the temporary closed pipe group (30), the reserved grouting pipe (20) and the pipe piece (10) along the axial direction of the temporary closed pipe group (30) and stretches into soil body behind the wall of the pipe piece (10), and the overhanging end of the grouting guide pipe (40) stretches out of the temporary closed pipe group (30) in a sealing manner so as to be used for being connected with grouting equipment and pipe sealing equipment.
3. The radial reinforcing system for shield tunnel crossing water area according to claim 2,
the reserved grouting pipe (20) is hollow and tubular, and is pre-buried in the pipe piece (10) when the pipe piece (10) is manufactured;
the inner wall surface of the reserved grouting pipe (20) is also provided with internal threads for detachable connection with the temporary closed pipe group (30).
4. The radial reinforcing system for shield tunnel crossing water area according to claim 2,
the outer extending end of the reserved grouting pipe (20) is opened and extends to be flush with the back surface of the pipe piece (10);
the opposite embedded ends of the reserved grouting pipe (20) are closed by a first sealing piece (50) which can be pierced, so that water burst is prevented from entering the reserved grouting pipe (20) after the grouting pipe (40) pierces the first sealing piece (50), and the embedded ends of the reserved grouting pipe (20) do not extend out of the pipe piece (10).
5. The radial reinforcement system for shield tunnel across water area of claim 4,
the temporary closed pipe group (30) comprises a plugging head (31) with a limit flange (311), a sealing gasket (32) and a water-swelling sheet (33) which are arranged on the outer circle of the embedded end of the Feng Dutou (31), and a second sealing sheet (34) which is arranged on the overhanging end of the Feng Dutou (31);
the blocking head (31) is hollow and tubular, and the embedded end of the blocking head extends into the reserved grouting pipe (20) from an opening of the reserved grouting pipe (20) and is in threaded connection with the reserved grouting pipe (20);
the sealing gasket (32) and the water-swelling sheet (33) are pressed on the opening end of the reserved grouting pipe (20) through the limiting flange (311) so as to prevent water from flowing into the tunnel from a gap between the reserved grouting pipe (20) and the plugging head (31);
the second sealing piece (34) is used for sealing the opening of the reserved grouting pipe (20) before the grouting pipe (40) is not inserted, and is used for preventing water from flowing into the tunnel from a gap between the plugging head (31) and the grouting pipe (40) after the grouting pipe (40) is punctured.
6. The radial reinforcement system for shield tunnel across water according to claim 5,
the open end of the reserved grouting pipe (20) is concaved inwards to form a countersunk head groove (201);
the water-swelling sheet (33) and the sealing gasket (32) are limited between the limit flange (311) and the bottom surface of the countersunk groove (201).
7. The radial reinforcement system for shield tunnel across water according to claim 5,
the outer circle of the overhanging end of the blocking head (31) is also provided with an external thread for sealing water after being in threaded connection with a sealing valve with sealing function when water gushes.
8. The radial reinforcement system for shield tunnel across water according to claim 5,
the grouting guide pipe (40) is hollow and tubular, the embedded end of the grouting guide pipe is conical so as to be used for splitting soil bodies and reducing jacking resistance, and the opposite overhanging end of the grouting guide pipe extends out of the temporary closed pipe group (30) so as to be used for being connected with external grouting equipment and hole sealing equipment;
the grouting conduit (40) is provided with a grouting hole (401) for the slurry to overflow.
9. The radial reinforcing system for shield tunnel crossing water area according to claim 8,
the grouting guide pipe (40) comprises a jacking guide pipe (41), a standard joint guide pipe (42) and a tail guide pipe (43) which are sequentially arranged and communicated from the embedded end to the overhanging end;
the jacking guide pipe (41) and the standard joint guide pipe (42) and the tail guide pipe (43) are detachably connected through screw thread structures respectively.
10. The radial reinforcing system for shield tunnel crossing water area according to claim 8,
the outer circular surface of the grouting guide pipe (40) is concaved into a step pipe in a section in the length direction;
the grouting holes (401) are formed in the concave sections of the stepped pipes, and water stops are further wound on the outer circles of the concave sections, so that external sundries can be prevented from entering the grouting pipes (40) through the grouting holes (401) in the jacking process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320877030.5U CN220081439U (en) | 2023-04-19 | 2023-04-19 | Radial reinforcing system for shield tunnel penetrating through water area |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320877030.5U CN220081439U (en) | 2023-04-19 | 2023-04-19 | Radial reinforcing system for shield tunnel penetrating through water area |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220081439U true CN220081439U (en) | 2023-11-24 |
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| CN118517290A (en) * | 2024-07-22 | 2024-08-20 | 中铁五局集团电务工程有限责任公司 | Method and equipment for plugging by needling on water facing side of shield tunnel |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN118517290A (en) * | 2024-07-22 | 2024-08-20 | 中铁五局集团电务工程有限责任公司 | Method and equipment for plugging by needling on water facing side of shield tunnel |
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