CN210118138U - Reinforcing structure for large-span tunnel to pass existing railway downwards - Google Patents
Reinforcing structure for large-span tunnel to pass existing railway downwards Download PDFInfo
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- CN210118138U CN210118138U CN201920075628.6U CN201920075628U CN210118138U CN 210118138 U CN210118138 U CN 210118138U CN 201920075628 U CN201920075628 U CN 201920075628U CN 210118138 U CN210118138 U CN 210118138U
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Abstract
A reinforced structure for a long-span tunnel to penetrate through an existing railway is used for effectively controlling railway settlement and ensuring the safety of existing railway operation and newly-built tunnel construction. The reinforced structure comprises an existing railway reinforced structure and a newly-built tunnel lower-penetrating-section reinforced structure. Existing railway reinforced structure includes left side support pile, the body of a hole support pile and the right side support pile that sets up in a row in existing railway both sides, and wherein left side support pile, right side support pile lie in newly-built tunnel wear the section under the excavation sideline beyond, and the body of a hole support pile is vertical to be passed newly-built tunnel and is worn the section under, and left side support pile, the body of a hole support pile and right side support pile set up the support pile outward and dig hole protective structure. And pile tops of the left side supporting pile and the hole body supporting pile and the right side supporting pile on the same side are respectively provided with a left side D-shaped temporary beam and a right side D-shaped temporary beam so as to span the newly-built tunnel lower-penetrating section in two spans. The left D-shaped temporary beams and the right D-shaped temporary beams on the two sides are provided with cross beams which are fixedly connected with the D-shaped temporary beams at intervals along the extension direction of the existing railway, and the rails of the existing railway are fixedly arranged on the cross beams.
Description
Technical Field
The utility model relates to a railway engineering, in particular to wear reinforced structure of existing railway under tunnel greatly strides, be particularly useful for big section, the shallow tunnel of burying and wear the tunnel construction of existing railway under the tunnel.
Background
At present, domestic railway traffic is in the development and construction period, and the problem of line crossing inevitably occurs. If the construction method of the newly built tunnel passing through the existing railway is improper, the existing railway is excessively settled or collapsed, the normal operation of the railway is affected, and even the safety of lives and properties is seriously threatened. When the tunnel is constructed by the underground excavation method, the construction safety is ensured, and the normal operation of the existing railway is ensured.
At present, three common methods for reinforcing the existing underpass linear track are provided, namely a fastening track and longitudinal and transverse beam reinforcing scheme, a D-beam reinforcing scheme and a I-beam reinforcing scheme. However, the reinforcing methods for the lines are adopted only, so that a plurality of disadvantages exist, if the maximum span of a common standard D temporary beam is 24m when the span is large, the D temporary beam cannot span the existing line once when the intersection angle of the line and the existing line is small, a support pile needs to be additionally arranged in the range of the tunnel body, the tunnel lining trolley cannot be installed in place due to the fact that the support pile invades into the range of the tunnel body, even if a simple small template is adopted for pouring a second lining, a waterproof plate cannot be fully paved, the steel bars of the second lining have broken ends at the pile foundation, and adverse effects are caused on the later-stage operation safety and the waterproof quality of the tunnel.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a wear existing railway's reinforced structure under tunnel greatly is provided to effective control railway subsides, ensures existing railway operation and newly-built tunnel construction safety, improves the efficiency of construction, reduces construction cost by a wide margin.
The utility model provides a technical scheme that its technical problem adopted as follows:
the utility model discloses a wear existing railway's reinforced structure under tunnel greatly strides, the section is worn under the new tunnel of its below is strideed across to existing railway, reinforced structure wears section reinforced structure, characterized by under existing railway reinforced structure, the new tunnel: the existing railway reinforcing structure comprises left side supporting piles, hole body supporting piles and right side supporting piles which are arranged in rows on two sides of an existing railway, wherein the left side supporting piles and the right side supporting piles are positioned outside an excavation sideline of a newly-built tunnel lower penetrating section; respectively arranging a left D-shaped temporary beam and a right D-shaped temporary beam on the pile tops of the left supporting pile and the hole body supporting pile and the right supporting pile on the same side, and spanning the lower penetrating section of the newly-built tunnel in two spans; the left D-shaped temporary beams and the right D-shaped temporary beams on the two sides are provided with cross beams which are fixedly connected with the D-shaped temporary beams at intervals along the extension direction of the existing railway, and the rails of the existing railway are fixedly arranged on the cross beams.
The left side support pile, the hole body support pile and the right side support pile are all of reinforced concrete structures, the support pile hole digging protection structure comprises a retaining wall surrounding a pile body, steel pipe piles arranged outside the retaining wall at intervals close to the existing railway side, and a ballast blocking steel plate arranged outside the steel pipe piles on the upper portion of the pile body.
The newly-built tunnel underpass section reinforcing structure comprises an advance support, a primary support and a lining structure; the primary support is composed of system anchor rods and a primary support structure, the primary support structure covers surrounding rocks of a lower penetrating section of the newly-built tunnel, and the system anchor rods are arranged in the surrounding rocks of the arch part and the side wall part at intervals in the circumferential direction; the advanced support is annularly and alternately driven into an advanced large pipe shed in the surrounding rock of the arch part; the lining structure is formed by compounding a secondary lining structure and a tertiary lining structure, and the waterproof layer is arranged between the secondary lining structure and the tertiary lining structure.
The utility model has the advantages that the D-shaped temporary beam is adopted to reinforce the track of the existing railway, the construction has little influence on the operation of the existing railway, the span can be flexibly adjusted, the application range is wide, and the repeated D-shaped temporary beam can be recycled; the newly-built tunnel is constructed by adopting a double-side-wall pit guiding method, the lower penetrating section of the newly-built tunnel is supported by adopting a large pipe shed advance support, and a support system of three-layer composite lining can effectively solve the problem of railway subgrade settlement, provide effective guarantee for railway operation safety, ensure construction safety, shorten the construction period and reduce the construction cost.
Drawings
The specification includes the following five figures:
FIG. 1 is a plan view of the reinforcing structure of the present invention for a long-span tunnel to pass through an existing railway;
FIG. 2 is an elevation view of the reinforcing structure of the present invention for a long-span tunnel passing through an existing railway;
FIG. 3 is a cross-sectional view of the supporting pile hole digging protection structure in the reinforcing structure of the large-span tunnel passing through the existing railway;
FIG. 4 is a cross-sectional view of the reinforcing structure of the present invention for a long-span tunnel to pass through an existing railway;
fig. 5 is the utility model discloses wear the section view of wearing the section under the tunnel newly-built among the reinforced structure of existing railway under the tunnel of striding greatly.
The figures show the components and corresponding references: the construction method comprises the steps of an existing railway 10, a track 11, a left side supporting pile 12a, a hole body supporting pile 12b, a right side supporting pile 12c, a left side D-shaped temporary beam 13a, a right side D-shaped temporary beam 13b, a cross beam 14, a steel pipe pile 15, a ballast blocking steel plate 16, a protective wall 17, a ballast bed 18, an excavation sideline 20, a newly-built tunnel lower penetrating section 21, a system anchor rod 22, an advanced large pipe shed 23, an initial supporting structure 24, a secondary lining structure 25, a tertiary lining structure 26 and a waterproof layer 27.
Detailed Description
The present invention will be further explained with reference to the drawings and examples.
Referring to fig. 1 and 2, the utility model discloses a wear existing railway's reinforced structure under tunnel greatly, existing railway 10 stridees across section 21 under its below the newly-built tunnel, and reinforced structure includes existing railway reinforced structure, wears section reinforced structure under the newly-built tunnel. The existing railway reinforcing structure comprises left side supporting piles 12a, hole body supporting piles 12b and right side supporting piles 12c which are arranged in rows on two sides of an existing railway 10, wherein the left side supporting piles 12a and the right side supporting piles 12c are located outside an excavation sideline 20 of a newly-built tunnel lower penetrating section 21, the hole body supporting piles 12b vertically penetrate through the newly-built tunnel lower penetrating section 21, and supporting pile hole digging protection structures are arranged outside the left side supporting piles 12a, the hole body supporting piles 12b and the right side supporting piles 12 c. And a left D-shaped temporary beam 13a and a right D-shaped temporary beam 13b are respectively arranged on the pile tops of the left supporting pile 12a and the body supporting pile 12b, and the body supporting pile 12b and the right supporting pile 12c on the same side so as to span the newly-built tunnel underpass section 21 in two spans. Referring to fig. 4, cross members 14 having both ends fixedly connected to the left and right D- shaped sills 13a and 13b are provided at intervals in the extending direction of the existing railway 10, and the rails 11 of the existing railway 10 are fixedly provided on the cross members 14.
Referring to fig. 3, the left side supporting pile 12a, the hole body supporting pile 12b and the right side supporting pile 12c are of reinforced concrete structures, and are constructed by adopting bored piles, and the supporting pile bored protection structure comprises a retaining wall 17 surrounding a pile body, steel pipe piles 15 arranged outside the retaining wall 17 at intervals on the side close to the existing railway 10, and a ballast blocking steel plate 16 arranged outside the steel pipe piles 15 on the upper portion of the pile body.
Referring to fig. 5, the newly-built tunnel lower-penetrating-section reinforcing structure comprises a forepoling structure, a primary support structure and a lining structure; the primary support is composed of system anchor rods 22 and a primary support structure 24, the primary support structure 24 covers surrounding rocks of a newly-built tunnel lower-penetrating section 21, and the system anchor rods 22 are arranged in the surrounding rocks of the arch part and the side wall part at intervals in the circumferential direction. And the advanced support ring direction is driven into the advanced large pipe shed 23 in the surrounding rock of the arch part at intervals. The lining structure is formed by compounding a secondary lining structure 25 and a tertiary lining structure 26, and a waterproof layer 27 is arranged between the secondary lining structure 25 and the tertiary lining structure 26. The secondary lining structure 25 and the tertiary lining structure 26 are reinforced concrete structures.
Referring to fig. 1 to 5, the utility model discloses a wear reinforced structure of existing railway under tunnel greatly is under according to following step and is under being under construction:
① measuring and lofting on both sides of the existing railway 10 to determine the positions of the left support pile 12a, the body support pile 12b and the right support pile 12 c;
② constructing left side supporting piles 12a, body supporting piles 12b and right side supporting piles 12c on two sides;
③, two left D-shaped temporary beams 13a and right D-shaped temporary beams 13b are installed, a beam 14 penetrates under the track 11 of the existing railway 10, and two ends of the beam 14 are connected with the left D-shaped temporary beams 13a and the right D-shaped temporary beams 13b at two sides into a whole;
④, mechanically excavating a newly-built tunnel lower penetrating section 21, constructing an advanced large pipe shed 23 before excavation, and constructing a system anchor rod 22, a primary supporting structure 24 and a secondary lining structure 25 in time after excavation;
⑤ after the secondary lining structure 25 in the tunnel underpass section 21 reaches the design strength, cutting off and dismantling the hole body supporting pile 12b, and constructing the waterproof and drainage facility and the tertiary lining structure 26 within the influence range of the hole body supporting pile 12 b.
Referring to fig. 3, in step ②, the left side support pile 12a, the body support pile 12b, and the right side support pile 12c are bored piles, and before boring, the ballast steel plate 16, the steel pipe pile 15, and the retaining wall 17 are constructed outside the positions thereof.
Referring to fig. 4, the step ③ is performed by installing a left D-shaped temporary girder 13a and a right D-shaped temporary girder 13b on the top of one of the left side support piles 12a and the body support piles 12b, the body support piles 12b and the right side support piles 12c, removing sleepers under the rails 11 of the existing railway 10, inserting the cross beam 14, installing a left D-shaped temporary girder 13a and a right D-shaped temporary girder 13b on the top of the other of the left side support piles 12a and the body support piles 12b, the body support piles 12b and the right side support piles 12c, and connecting the two ends of the cross beam 14 to the left D-shaped temporary girders 13a and the right D-shaped temporary girders 13b through bolts.
Referring to fig. 1 and 2, the utility model discloses a D type is just roof beam is consolidated existing railway 10's track 11, and the construction is little to existing line operation influence, and the span can be adjusted in a flexible way, and application scope is wide to recoverable repeated D type is just roof beam utilizes. The newly-built tunnel is constructed by adopting a double-side-wall pit guiding method, the lower penetrating section of the newly-built tunnel is supported by adopting a large pipe shed advance support, and a support system of three-layer composite lining can effectively solve the problem of railway subgrade settlement, provide effective guarantee for railway operation safety, ensure construction safety, shorten the construction period and reduce the construction cost.
Example (b):
the applicant has successfully applied the reinforcing structure and construction method of the utility model to the design and construction of the existing open-sun branch line under the Yu noble line fan slope tunnel.
The tunnel has an inlet mileage DK277+973, an outlet mileage DK278+773 and a total length of 800 m. The tunnel runs from northeast to southwest, an existing open-sun branch railway is penetrated under a tunnel body DK278+ 050- +110 section, the intersection mileage DK278+083 and the plane intersection angle is 37 degrees 05 degrees. The existing railway is a single-track railway, the newly-built railway is a double-track railway, the speed per hour is 200km/h, the existing railway is penetrated under the underground excavated tunnel, the clear width of the inner contour of the tunnel is more than 12m, and the excavation width is more than 14 m. The excavation width of the existing line direction tunnel exceeds 30m, the height difference between the two rail surfaces is about 14m, the height difference between the vault and the rail surface of the tunnel is about 5m, and the tunnel is an ultra-shallow buried tunnel. The construction quality and the safety of normal operation and construction of the existing railway are effectively guaranteed.
The above is only used for illustrating the present invention, and the present invention is not limited to the specific structure and application range shown and described, so all the modifications and equivalents that may be utilized belong to the claimed scope of the present invention.
Claims (4)
1. Wear existing railway's reinforced structure under tunnel greatly, existing railway (10) stride across under its below the new tunnel wear section (21), reinforced structure includes existing railway reinforced structure, wears section reinforced structure under the new tunnel, characterized by: the existing railway reinforcing structure comprises left side supporting piles (12a), hole body supporting piles (12b) and right side supporting piles (12c) which are arranged in rows on two sides of an existing railway (10), wherein the left side supporting piles (12a) and the right side supporting piles (12c) are positioned outside an excavation sideline (20) of a newly-built tunnel underpass section (21), the hole body supporting piles (12b) vertically penetrate through the newly-built tunnel underpass section (21), and supporting pile hole digging protection structures are arranged outside the left side supporting piles (12a), the hole body supporting piles (12b) and the right side supporting piles (12 c); the pile tops of the left side supporting pile (12a) and the hole body supporting pile (12b) on the same side, and the hole body supporting pile (12b) and the right side supporting pile (12c) are respectively provided with a left side D-shaped temporary beam (13a) and a right side D-shaped temporary beam (13b) so as to span a newly-built tunnel lower-penetrating section (21) in two steps; crossbeams (14) with two ends fixedly connected with the D-shaped temporary beams (13a) on the left side and the D-shaped temporary beams (13b) on the right side are arranged at intervals along the extension direction of the existing railway (10), and the rails (11) of the existing railway (10) are fixedly arranged on the crossbeams (14).
2. The reinforcing structure for the long-span tunnel to pass through the existing railway according to claim 1, which is characterized in that: left side support pile (12a), hole body support pile (12b) and right side support pile (12c) are reinforced concrete structure, support pile hole digging protective structure including encircle dado (17) of pile body to and set up in dado (17) outer steel-pipe pile (15) near existing railway (10) side interval, and set up fender tiny fragments of stone, coal, etc. steel-pipe pile (15) outside on pile body upper portion.
3. The reinforcing structure for the long-span tunnel to pass through the existing railway according to claim 1, which is characterized in that: the newly-built tunnel underpass section reinforcing structure comprises an advance support, a primary support and a lining structure; the primary support is composed of system anchor rods (22) and a primary support structure (24), the primary support structure (24) covers surrounding rocks of a newly-built tunnel lower-penetrating section (21), and the system anchor rods (22) are arranged in the surrounding rocks of the arch part and the side wall part at intervals in the circumferential direction; the advanced support rings are driven into an advanced large pipe shed (23) in the surrounding rock of the arch part at intervals; the lining structure is formed by compounding a secondary lining structure (25) and a tertiary lining structure (26), and a waterproof layer (27) is arranged between the secondary lining structure (25) and the tertiary lining structure (26).
4. The reinforcing structure for the long-span tunnel to pass through the existing railway according to claim 3, which is characterized in that: the secondary lining structure (25) and the tertiary lining structure (26) are reinforced concrete structures.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920075628.6U CN210118138U (en) | 2019-01-17 | 2019-01-17 | Reinforcing structure for large-span tunnel to pass existing railway downwards |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920075628.6U CN210118138U (en) | 2019-01-17 | 2019-01-17 | Reinforcing structure for large-span tunnel to pass existing railway downwards |
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| CN210118138U true CN210118138U (en) | 2020-02-28 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109989767A (en) * | 2019-01-17 | 2019-07-09 | 中铁二院贵阳勘察设计研究院有限责任公司 | The ruggedized construction and construction method of existing railway are worn under Large span tunnel |
| CN111305050A (en) * | 2020-03-12 | 2020-06-19 | 中交第三航务工程局有限公司 | Protection process for existing piers on two sides in tunnel construction |
-
2019
- 2019-01-17 CN CN201920075628.6U patent/CN210118138U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109989767A (en) * | 2019-01-17 | 2019-07-09 | 中铁二院贵阳勘察设计研究院有限责任公司 | The ruggedized construction and construction method of existing railway are worn under Large span tunnel |
| CN111305050A (en) * | 2020-03-12 | 2020-06-19 | 中交第三航务工程局有限公司 | Protection process for existing piers on two sides in tunnel construction |
| CN111305050B (en) * | 2020-03-12 | 2021-10-15 | 中交第三航务工程局有限公司 | Protection process for existing piers on two sides in tunnel construction |
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