CN210829286U - Shield tunnel passes river course scour prevention structure down - Google Patents
Shield tunnel passes river course scour prevention structure down Download PDFInfo
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- CN210829286U CN210829286U CN201921894954.6U CN201921894954U CN210829286U CN 210829286 U CN210829286 U CN 210829286U CN 201921894954 U CN201921894954 U CN 201921894954U CN 210829286 U CN210829286 U CN 210829286U
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Abstract
The utility model relates to a tunnel under shield tunnel wears river course scour prevention structure, this scour prevention structure includes: the row piles are vertically inserted into soil bodies below the riverway, are perpendicular to the riverway and are positioned on one side, close to the upstream, of the tunnel; and the chain row structure is fixed at the top of the row piles, and is horizontally laid in the river channel at the position above the tunnel. The utility model has the advantages that: adopt the campshed to insert and establish and be fixed in the river course below soil body, provide fixed basis for the chain bar structure to lay the effect that plays protection river course earthing in the river course through holistic chain bar structure, stability preferred, thereby guarantee long-term scour prevention effect.
Description
Technical Field
The utility model relates to a tunnel construction technical field refers in particular to a shield tunnel wears river course scour prevention structure down.
Background
At present, the shield construction of the subway tunnel in China has the structural design year limit of 100 years and the structural safety level is one level. Wear the river course under shield tunnel, sufficient earthing thickness should be guaranteed to the tunnel top, but rivers receive the change of season water level and environment probably to lead to the velocity of flow to increase the degree of washout and strengthen and the accumulative total washing away leads to tunnel earthing thickness attenuation in the river course, are unfavorable for tunnel structure safety, for guaranteeing the river course scour prevention, need to pass through the river course within range to the shield tunnel and take the scour prevention measure.
The traditional method has a stone throwing method, and although the method has the characteristics of convenience in construction, short construction period and good economy, the whole stability of the stone throwing method is not strong, the local part is easily influenced by water flow irrigation, and the thickness of the soil covering for the shield tunnel to pass through the river is difficult to guarantee for a long time.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art's defect, provide a tunnel-penetrating river course scour prevention structure under shield tunnel, can solve the problem of the not good problem of the long-term scour prevention effect of current way.
The technical scheme for realizing the purpose is as follows:
the utility model provides a tunnel under shield tunnel wears river course scour prevention structure, include:
the row piles are vertically inserted into soil bodies below the riverway, are perpendicular to the riverway and are positioned on one side, close to the upstream, of the tunnel; and
and the chain row structure is fixed at the top of the row pile and fully paved in the river channel in the river flow direction and positioned above the tunnel.
The beneficial effects of the utility model are that, adopt the campshed to insert and establish and be fixed in the river course below soil body, provide fixed basis for the chain bar structure to lay the effect that plays protection river course earthing in the river course through holistic chain bar structure, the stability preferred, thereby guarantee long-term scour prevention effect.
The utility model discloses the shield tunnel wears river course scour prevention structure's further improvement to lie in down, the chain bar structure includes prefabricated concrete piece of multirow and transverse connection line, passes through between the prefabricated concrete piece on every row transverse connection line connects, just transverse connection line's one end is fixed with the top of row's stake.
The utility model discloses the shield tunnel wears river course scour prevention structure's further improvement to lie in down, the chain bar structure is still including the longitudinal tie who connects the prefabricated concrete piece of multirow, longitudinal tie and transverse connection line constitute network structure, prefabricated concrete piece spacing in longitudinal tie and transverse connection line's cross section.
The utility model discloses the shield tunnel wears river course scour prevention structure's further improvement down and lies in, the top of campshed is equipped with guan liang, guan liang is located the river course, just guan liang inside anchor transverse connection line's one end.
The utility model discloses shield tunnel wears river course scour prevention structure's further improvement to lie in, still including two scour protection grooves that are formed in the river course, two scour protection grooves are located the upstream side and the downstream side of chain bar structure respectively.
Drawings
Fig. 1 is the utility model discloses the side view of tunnel erosion prevention structure is worn under the shield tunnel.
Fig. 2 is a partially enlarged schematic view of a portion a in fig. 1.
Fig. 3 is the utility model discloses the top view of canopy roof beam and chain bar structure in tunnel scour prevention structure is worn down to the shield tunnel.
Fig. 4 is a partially enlarged schematic view of a portion B in fig. 3.
Fig. 5 is the utility model discloses shield tunnel wears the schematic structure of prefabricated concrete piece in the river course scour prevention structure down.
Description of reference numerals:
10-a gravel cushion layer; 20-row of piles; 21-a crown beam; 30-chain row structure; 31-prefabricating concrete blocks; 311-lateral grooves; 312-lateral through holes; 313-longitudinal grooves; 314-longitudinal through holes; 32-transverse connecting lines; 33-longitudinal connecting lines; 34-a transverse connection; 40-dry masonry layer; 50-anti-scour groove.
Detailed Description
The invention will be further explained with reference to the drawings and the specific embodiments.
Referring to fig. 1, the utility model provides a tunnel erosion protection structure is worn under shield tunnel can guarantee long-term anti-scouring effect. The following description is provided with reference to the accompanying drawings for the river erosion prevention structure under the shield tunnel.
As shown in fig. 1 and 2, the tunnel 90 is oriented perpendicular to the direction of the river. The utility model discloses tunnel shield underpass river course scour prevention structure includes: the gravel layer comprises a gravel cushion layer 10 laid at the bottom of the river channel, row piles 20 vertically inserted into soil below the river channel, a chain row structure 30 fixed at the tops of the row piles and a dry masonry layer 40 laid in the river channel.
Wherein, the gravel cushion layer 10 is covered on the river covering soil. The row piles 20 are perpendicular to the river channel and located on one side, close to the upstream, of the tunnel 90, the chain row structures 30 are fully paved in the river channel in the position above the tunnel 90, and the side, close to the upstream, of the chain row structures 30 is fixed to the tops of the row piles 20. The chain row structure 30 is positioned above the rock cushion 10 such that the rock cushion 10 is partially below the chain row structure 30. The dry stone layer 40 is disposed over the chain mat structure 30 and the crushed stone pad 10.
As shown in fig. 1 and 3, the distance between the row of piles 20 and the outer edge line of the tunnel 90 in the horizontal direction is greater than twice the hole diameter of the tunnel 90, so as to avoid the interference of the construction of the row of piles 20 on the tunnel 90. Preferably, the width of the row pile 20 is larger than the width of the river, and the bottom end of the row pile 20 is embedded into the rock stratum, so as to ensure the stability of the arrangement of the row pile 20. In a preferred embodiment, the piles 20 are driven cast-in-place piles. And binding reinforcing steel bars at the tops of the row piles 20 and pouring concrete to form a crown beam 21, wherein the crown beam 21 is positioned in the river channel. Through the setting of row's stake 20 top and crown beam 21 in tunnel 90 near the top one side of upstream, not only provide fixed basis for chain bar structure 30, still play the effect that blocks the interior rivers of river course and wash for a long time.
As shown in fig. 3 and 4, the chain row structure 30 comprises a plurality of rows of precast concrete blocks 31 and transverse connecting lines 32, the precast concrete blocks 31 on each row are connected by the transverse connecting lines 32, and one end of the transverse connecting lines 32 is anchored in the crown beam at the top of the row pile. Each row of prefabricated concrete blocks 31 are arranged along the extending direction of the river channel, and the prefabricated concrete blocks 31 on each row are arranged at intervals. On the one hand, transverse connection line 32 is flexible structure for chain bar structure 30 possesses basic deformation adaptability for flexible structure, and when the rubble bed course 10 of its lower part appeared instead elutriating, chain bar structure 30's flexible characteristics made it can be automatically to the position formation packing that takes place against elutriating under self action of gravity, guaranteed long-term scour prevention effect. On the other hand, the horizontal large-area concrete pouring in the river channel is complicated, and the chain row structure is formed by directly connecting a plurality of prefabricated concrete blocks 31 in series through transverse connecting lines 32, so that the construction is easy.
Further, the chain-row structure 30 further comprises a longitudinal connecting line 33 connected with a plurality of rows of prefabricated concrete blocks 31, the longitudinal connecting line 33 and the transverse connecting line 31 are fixed to form a net structure, and the prefabricated concrete blocks are limited at the intersection of the longitudinal connecting line and the transverse connecting line. The arrangement of the longitudinal connecting lines 33 allows the chain bar structure 30 to be formed as a single unit, thereby further enhancing its anti-scour properties without altering its flexibility characteristics. Preferably, the transverse connecting wires 32 and the longitudinal connecting wires 33 are steel stranded wires. And preferably, the longitudinal connecting lines 33 are obliquely arranged so that the plurality of rows of prefabricated concrete blocks 31 are arranged in an M-shape.
As shown in fig. 4 and 5, the precast concrete block 31 is a rectangular concrete block having a certain thickness. The shorter side of the precast concrete block 31 is provided with a transverse through hole 312 for the transverse connecting line 32 to pass through, and one transverse connecting line 32 is connected in series with one row of precast concrete blocks 31. The longer side of the precast concrete block 31 is provided with a longitudinal through hole 314 for the longitudinal connecting line 33 to pass through, and preferably, one precast concrete block 31 is provided with two longitudinal through holes 314, and the two longitudinal connecting lines 33 are connected in series with one precast concrete block 31. The center of the prefabricated concrete block corresponds to the intersection of the transverse connecting line 32 and the longitudinal connecting line 33 to form hollow-out, so that the transverse connecting line 32 and the longitudinal connecting line 33 at the intersection are fixedly connected, and then the position of the prefabricated concrete block 31 is limited. Further, the surface of the precast concrete block 31 corresponding to the shorter side is formed with a transverse groove 311, and a transverse through hole 312 is opened in the transverse groove 311, and likewise, the surface of the precast concrete block 31 corresponding to the longer side is formed with a longitudinal groove 313, and a longitudinal through hole 314 is opened in the corresponding longitudinal groove 313.
In a preferred embodiment, in order to further enhance the integrity and the anti-scouring capability of the chain bar structure 30, the chain bar structure 30 further includes a transverse connecting member 34 and a longitudinal connecting member (not shown), the transverse connecting member 34 is sleeved on the transverse connecting line 32 and located between two adjacent precast concrete blocks 31, and the longitudinal connecting member is sleeved on the longitudinal connecting line 33 and located between two adjacent precast concrete blocks 31. Preferably, the ends of the transverse links 34 and the longitudinal links are shaped to fit into the corresponding transverse grooves 311 and longitudinal grooves 313.
As shown in fig. 1, since the top of the row pile 20 and the chain row structure 30 block water flow, in order to prevent the water flow back washing phenomenon, the anti-erosion structure of the present invention further includes two anti-erosion grooves 50 formed in the river channel, and the two anti-erosion grooves 50 are respectively located at the upstream side (i.e. the upstream side of the row pile 20) and the downstream side of the chain row structure 30.
The following description is made in conjunction with the accompanying drawings for the construction method of the shield tunnel underpass river channel anti-erosion structure of the utility model.
As shown in fig. 1 and 2, the utility model discloses shield tunnel wears river course scour prevention structure down and is under construction after tunnel 90 construction finishes, and specific construction method includes following step:
paving a gravel cushion layer 10 at the bottom of the river channel, and covering the gravel cushion layer 10 on the river channel soil cover;
constructing a row pile 20, vertically inserting the row pile 20 into soil below the river channel, and enabling the row pile 20 to be perpendicular to the river channel and located on one side, close to the upstream, of the tunnel 90;
constructing a chain row structure 30, horizontally paving the chain row structure 30 on the gravel cushion layer 10 in the river channel and above the tunnel, and fixing the chain row structure 30 on the top of the row piles 20; and
and laying a dry masonry layer 40 in the river channel, so that the dry masonry layer 40 is positioned above the chain row structure 30 and the gravel cushion layer 10.
As shown in fig. 1 and 3, when the row pile 20 is constructed, the distance between the row pile 20 and the outer edge line of the tunnel 90 in the horizontal direction is greater than twice of the hole diameter of the tunnel 90, so as to avoid the interference of the construction of the row pile 20 on the tunnel 90. Preferably, the width of the row pile 20 is designed to be larger than the width of the river, and the bottom end of the row pile 20 is embedded into the rock stratum, so that the stability of the arrangement of the row pile 20 is ensured. In a preferred embodiment, the piles 20 are cast-in-place stakes. And binding reinforcing steel bars at the tops of the row piles 20, pouring concrete to form a crown beam 21, and enabling the crown beam 21 to be located in the river channel.
As shown in fig. 3 and 4, the construction chain bank structure 30 includes the steps of:
providing a plurality of rows of precast concrete blocks 31 and transverse connecting lines 32, connecting the precast concrete blocks 31 on each row through the transverse connecting lines 32, so that the precast concrete blocks 31 on each row are arranged along the extending direction of the river channel, the precast concrete blocks 31 on each row are arranged at intervals, and one end of each transverse connecting line 32 is anchored in the crown beam 21.
Providing longitudinal connecting lines 33, connecting a plurality of rows of prefabricated concrete blocks 31 by using the longitudinal connecting lines 33, fixedly connecting the longitudinal connecting lines 33 and the transverse connecting lines 31 to form a net structure, and limiting the prefabricated concrete blocks 31 at the intersections of the longitudinal connecting lines 33 and the transverse connecting lines 31.
As shown in fig. 4 and 5, the precast concrete block 31 is a rectangular concrete block having a certain thickness, a transverse through hole 312 for the transverse connecting line 32 to pass through is formed at a shorter side of the precast concrete block 31, and when the precast concrete block 31 is connected, one transverse connecting line 32 is connected in series with one row of precast concrete blocks 31. The longer side of the precast concrete block 31 is provided with a longitudinal through hole 314 for the longitudinal connecting line 33 to pass through, and preferably, one precast concrete block 31 is provided with two longitudinal through holes 314, and when the precast concrete block 31 is connected, the two longitudinal connecting lines 33 are connected in series with one precast concrete block 31. The crossing of the transverse connecting line 32 and the longitudinal connecting line 33 corresponding to the center of the prefabricated concrete block is processed into a hollow part, and the transverse connecting line 32 and the longitudinal connecting line 33 at the crossing are fixedly connected, so that the position of the prefabricated concrete block 31 is limited. Further, a transverse groove 311 is formed on the surface of the precast concrete block 31 corresponding to the shorter side, and a transverse through hole 312 is formed in the transverse groove 311, and similarly, a longitudinal groove 313 is formed on the surface of the precast concrete block 31 corresponding to the longer side, and a longitudinal through hole 314 is formed in the corresponding longitudinal groove 313.
In a preferred embodiment, in order to further enhance the integrity and the anti-scouring capability of the chain bar structure 30, a transverse connecting member 34 and a longitudinal connecting member (not shown) are provided, the transverse connecting member 34 is sleeved on the transverse connecting line 32 and located between two adjacent precast concrete blocks 31, and the longitudinal connecting member is sleeved on the longitudinal connecting line 33 and located between two adjacent precast concrete blocks 31. Preferably, the ends of the lateral connectors 34 and the longitudinal connectors are shaped to fit into the corresponding lateral grooves 311 and longitudinal grooves 313. The erosion preventing grooves 50 are dug at the upstream side and the downstream side of the chain row structure 30 in the river.
The present invention has been described in detail with reference to the embodiments shown in the drawings, 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 tunnel wears river course scour prevention structure down which characterized in that includes:
the row piles are vertically inserted into soil bodies below the riverway, are perpendicular to the riverway and are positioned on one side, close to the upstream, of the tunnel; and
and the chain row structure is fixed at the top of the row pile and fully paved in the river channel in the river flow direction and positioned above the tunnel.
2. The shield tunnel underpass river channel anti-scouring structure of claim 1, wherein the chain row structure comprises a plurality of rows of precast concrete blocks and transverse connecting lines, the precast concrete blocks on each row are connected through the transverse connecting lines, and one end of each transverse connecting line is fixed with the top of each row of piles.
3. The shield tunnel underpass river channel anti-scouring structure of claim 2, wherein the chain row structure further comprises longitudinal connecting lines connecting a plurality of rows of precast concrete blocks, the longitudinal connecting lines and the transverse connecting lines form a net structure, and the precast concrete blocks are limited at intersections of the longitudinal connecting lines and the transverse connecting lines.
4. The shield tunnel underpass river channel anti-scouring structure of claim 2, wherein a crown beam is arranged at the top of the row of piles, the crown beam is positioned in the river channel, and one end of the transverse connecting line is anchored inside the crown beam.
5. The shield tunnel underpass river channel erosion prevention structure of claim 1, further comprising two erosion prevention grooves formed in the river channel, the two erosion prevention grooves being respectively located at an upstream side and a downstream side of the chain row structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921894954.6U CN210829286U (en) | 2019-11-05 | 2019-11-05 | Shield tunnel passes river course scour prevention structure down |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921894954.6U CN210829286U (en) | 2019-11-05 | 2019-11-05 | Shield tunnel passes river course scour prevention structure down |
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| Publication Number | Publication Date |
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| CN210829286U true CN210829286U (en) | 2020-06-23 |
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| CN201921894954.6U Active CN210829286U (en) | 2019-11-05 | 2019-11-05 | Shield tunnel passes river course scour prevention structure down |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113622956A (en) * | 2021-08-31 | 2021-11-09 | 中铁十八局集团有限公司 | Construction method for high-speed railway double-track tunnel to penetrate through vertical mud gushing karst cave |
-
2019
- 2019-11-05 CN CN201921894954.6U patent/CN210829286U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113622956A (en) * | 2021-08-31 | 2021-11-09 | 中铁十八局集团有限公司 | Construction method for high-speed railway double-track tunnel to penetrate through vertical mud gushing karst cave |
| US11686198B2 (en) | 2021-08-31 | 2023-06-27 | China Railway 18 Bureau Group Co. Ltd. | Reinforcement system at railway tunnel section passing through karst cave with large dip angle and construction method |
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