CN217080492U - End plugging and grouting structure of large-diameter shield tunnel - Google Patents
End plugging and grouting structure of large-diameter shield tunnel Download PDFInfo
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- CN217080492U CN217080492U CN202220040105.XU CN202220040105U CN217080492U CN 217080492 U CN217080492 U CN 217080492U CN 202220040105 U CN202220040105 U CN 202220040105U CN 217080492 U CN217080492 U CN 217080492U
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Abstract
The end plugging and grouting structure of the large-diameter shield tunnel effectively reduces the risk of water seepage and water leakage of the end of the large-diameter slurry balance shield tunnel. Including pre-buried portal steel ring and assemble the tunnel lining of cyclization by prefabricated section of jurisdiction, prefabricated section of jurisdiction is equipped with the fixed pre-buried steel sheet that sets up of radial interval on the vertical terminal surface adjacent with pre-buried portal steel ring, the hoop sets up sealed steel sheet in succession between this vertical terminal surface of pre-buried portal steel ring and prefabricated section of jurisdiction, the radial both ends of each sealed steel sheet are connected with pre-buried portal steel ring wall, pre-buried steel sheet on the section of jurisdiction respectively, adjacent sealed steel sheet hoop welded connection becomes a torus, the slip casting pipe of taking the open-close formula ball valve is set up to radial equidistance interval on this torus, the slip casting pipe is installed on the sealed steel sheet that corresponds the position.
Description
Technical Field
The utility model relates to a footpath shield tunnel, in particular to major diameter shield tunnel end shutoff and slip casting structure.
Background
The end of the large-diameter shield tunnel is an important part of the shield tunnel and is one of major risk points of shield construction. In the underground water rich section, the water level changes greatly along with the seasonality, and water seepage and water leakage are easy to occur before the tunnel portal ring beam is constructed. In severe cases, water and sand gushes may occur to cause the ground to collapse, so that a great safety risk exists.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a major diameter shield tunnel end shutoff and slip casting structure are provided to effectively reduce the seepage of major diameter muddy water balance shield tunnel end, the risk of leaking.
The utility model provides a technical scheme that its technical problem adopted as follows:
the utility model discloses a major diameter shield tunnel end shutoff and slip casting structure, include pre-buried portal steel ring and assemble the tunnel lining of cyclization by prefabricated section of jurisdiction, characterized by: prefabricated section of jurisdiction is equipped with the fixed pre-buried steel sheet that sets up of axial interval on the vertical terminal surface adjacent with pre-buried portal steel ring, the hoop sets up sealed steel sheet in succession between this vertical terminal surface of pre-buried portal steel ring and prefabricated section of jurisdiction, the radial both ends of each sealed steel sheet respectively with pre-buried portal steel ring wall, pre-buried steel sheet is connected on the section of jurisdiction, adjacent sealed steel sheet hoop welded connection becomes a torus, but the slip casting pipe of open-close formula ball valve is set up to the equidistance interval on this torus, the slip casting pipe is installed on the sealed steel sheet that corresponds the position.
The beneficial effects of the utility model are that, establish sealed steel sheet between pre-buried portal steel ring and the lining cutting ring canal piece, establish pre-buried steel sheet on the lining cutting ring canal piece, but set up the area on the torus that sealed steel sheet formed and take switching formula ball valve slip casting pipe, the seal is strong, the stagnant water is effectual, and application scope is wide, and construction convenience can effectively reduce major diameter muddy water balance shield tunnel end infiltration, the risk of leaking.
Drawings
The specification comprises the following five drawings:
FIG. 1 is a schematic cross-sectional structure diagram of a large-diameter shield tunnel end plugging and grouting structure of the present invention;
FIG. 2 is a schematic view of a longitudinal section structure of a large-diameter shield tunnel end plugging and grouting structure of the present invention;
FIG. 3 is a schematic cross-sectional view of a gate steel ring pre-embedded in a large-diameter shield tunnel end plugging and grouting structure of the present invention;
FIG. 4 is a schematic cross-sectional view of a tunnel lining ring segment in a large-diameter shield tunnel end plugging and grouting structure of the present invention;
figure 5 is the utility model discloses the vertical section structure sketch map of tunnel lining ring section of jurisdiction in major diameter shield tunnel end shutoff and slip casting structure.
The figures show the components and corresponding references: the device comprises an embedded portal steel ring 1, a prefabricated pipe piece 2, a sealing steel plate 3, a grouting pipe 4, a steel bar 5, an embedded steel plate 6, an openable ball valve 7, a lower section 11, a left section 12, a right section 13, an upper section 14 and anchor bars 15.
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 major diameter shield tunnel end shutoff and slip casting structure, include pre-buried portal steel ring 1 and assemble the tunnel lining of cyclization by prefabricated section of jurisdiction 2, prefabricated section of jurisdiction 2 is on the vertical terminal surface adjacent with pre-buried portal steel ring 1 the fixed pre-buried steel sheet 6 that sets up of hoop interval, the hoop sets up sealed steel sheet 3 in succession between this vertical terminal surface of pre-buried portal steel ring 1 and prefabricated section of jurisdiction 2, each sealed steel sheet 3's radial both ends respectively with pre-buried portal steel ring 1 rampart, pre-buried steel sheet 6 is connected, adjacent sealed steel sheet 3 hoop welded connection becomes a torus, go up to the equidistance interval on this torus and set up the slip casting pipe 4 of taking switchable ball valve 7, slip casting pipe 4 is installed on the sealed steel sheet 3 that corresponds the position. The sealing performance is strong, the water stopping effect is good, the application range is wide, the construction is convenient, and the water seepage and water leakage risks of the end of the large-diameter slurry water balance shield tunnel can be effectively reduced.
In the embodiment shown in fig. 3, the pre-buried portal steel ring 1 is formed by annularly splicing a lower segment 11, a left segment 12, a right segment 13 and an upper segment 14 which are pre-buried along with the horizontal segments of the side wall of the main structure of the shield shaft. The embedded portal steel ring 1 is provided with anchor bars 15 at intervals along the circumferential direction, and the embedded portal steel ring 1 is firmly connected with the side wall of the shield well main body structure through the anchor bars 15. The inside double-deck shaped steel that sets up segmentation design of pre-buried portal steel ring 1 supports, and is as an organic whole through bolted connection between each section double-deck shaped steel support, ensures that pre-buried portal steel ring 1 is indeformable at pre-buried in-process.
In the embodiment shown in fig. 4, the tunnel lining is formed by annularly assembling 9 prefabricated pipe pieces 2 (a 1, a2, A3, a4, a5, a6, B1, B2 and K in the figure). The embedded steel plates 6 are 72 blocks in total and are uniformly distributed on the end face of the tunnel lining circular ring. Referring to fig. 5, the embedded steel plate 6 is welded to the steel bars 5 embedded in the prefabricated segment 2. Referring to fig. 1, the sealing steel plates 3 are uniformly arranged on the torus in a total of 100 pieces.
Referring to fig. 1 to 5, in the construction process of the side wall of the main structure of the shield well, an embedded portal steel ring 1 and the side wall of the main structure of the shield well are connected into a whole through steel bars, but because the embedded portal steel ring 1 is directly large, the whole embedded portal steel ring 1 is divided into four sections, namely a lower section 11, a left section 12, a right section 13 and an upper section 14, and is embedded along with the horizontal segmentation of the side wall of the main structure of the shield well, after the main structure side wall is poured and the assembling construction of prefabricated segments 2 is completed, sundries between the embedded portal steel ring 1 and the lining ring segment 2 are cleaned, the contact part between the sealing steel plate 3 and the embedded portal steel ring 1 is polished, the contact part between the sealing steel plate 3 and the embedded steel plate 6 on the prefabricated segments 2 is polished, and the machined sealing steel plate 3 is hermetically welded with the polished embedded portal steel ring 1 and the embedded steel plate 6 one by one. The top sealing steel plate 6 is welded, and then the middle and lower sealing steel plates 6 are welded in sequence, and the sealing steel plate 6 with the grouting pipe 4 is welded at 9 points of 0 degree, 40 degrees, 80 degrees, 120 degrees, 160 degrees, 200 degrees, 240 degrees, 280 degrees, 320 degrees and the like. Treat that sealed steel sheet 6 is whole to be welded and accomplish, pre-buried portal steel ring 1, prefabricated section of jurisdiction 2 and sealed steel sheet 6 have been connected and have been a whole, but open closed ball valve 7 on the slip casting pipe 4 is opened, from the top begin, pour into double-liquid thick liquid in order, when treating to reach the predetermined pressure, but close closed ball valve 7.
The above is only used for illustrating the principles of the end plugging and grouting structure of the large-diameter shield tunnel of the present invention, and it is not intended to limit the present invention to the specific structure and the application range shown and described, so all the corresponding modifications and equivalents that may be utilized all belong to the patent scope applied by the present invention.
Claims (7)
1. Major diameter shield tunnel end shutoff and slip casting structure, include pre-buried portal steel ring (1) and assemble the tunnel lining who forms the ring by prefabricated section of jurisdiction (2), characterized by: prefabricated section of jurisdiction (2) is equipped with on the vertical terminal surface adjacent with pre-buried portal steel ring (1) and is set up pre-buried steel sheet (6) to the fixed pre-buried steel sheet (6) of interval of axial, the hoop sets up sealed steel sheet (3) in succession between this vertical terminal surface of pre-buried portal steel ring (1) and prefabricated section of jurisdiction (2), the radial both ends of each sealed steel sheet (3) respectively with pre-buried portal steel ring (1) rampart, pre-buried steel sheet (6) are connected, adjacent sealed steel sheet (3) hoop welded connection becomes a torus, it sets up slip casting pipe (4) of taking openable ball valve (7) to the equidistance interval to fit on this torus, slip casting pipe (4) are installed on the sealed steel sheet (3) that correspond the position.
2. The end plugging and grouting structure of the large-diameter shield tunnel according to claim 1, characterized in that: the embedded portal steel ring (1) is formed by annularly splicing a lower section (11), a left section (12), a right section (13) and an upper section (14) which are embedded along with the horizontal section of the side wall of the main structure of the shield well.
3. The end plugging and grouting structure of the large-diameter shield tunnel according to claim 2, characterized in that: the embedded portal steel ring (1) is provided with anchor bars (15) at intervals along the circumferential direction, and the embedded portal steel ring (1) is firmly connected with the side wall of the shield well main body structure through the anchor bars (15).
4. The end plugging and grouting structure of the large-diameter shield tunnel according to claim 2, characterized in that: the embedded portal steel ring (1) is internally provided with a double-layer section steel support in a segmented design, and the double-layer section steel supports are connected into a whole through bolts.
5. The end plugging and grouting structure of the large-diameter shield tunnel according to claim 1, characterized in that: the tunnel lining is formed by annularly assembling 9 prefabricated pipe pieces (2), the total number of the embedded steel plates (6) is 72, and the embedded steel plates are uniformly distributed on the end face of a tunnel lining circular ring.
6. The end plugging and grouting structure of the large-diameter shield tunnel according to claim 5, characterized in that: the embedded steel plate (6) is connected with embedded steel bars (5) in the prefabricated pipe piece (2) in a welding mode.
7. The end plugging and grouting structure of the large-diameter shield tunnel according to claim 1, characterized in that: the sealing steel plates (3) are 100 blocks in total and are uniformly arranged on the circular ring surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220040105.XU CN217080492U (en) | 2022-01-07 | 2022-01-07 | End plugging and grouting structure of large-diameter shield tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220040105.XU CN217080492U (en) | 2022-01-07 | 2022-01-07 | End plugging and grouting structure of large-diameter shield tunnel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217080492U true CN217080492U (en) | 2022-07-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220040105.XU Active CN217080492U (en) | 2022-01-07 | 2022-01-07 | End plugging and grouting structure of large-diameter shield tunnel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217080492U (en) |
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2022
- 2022-01-07 CN CN202220040105.XU patent/CN217080492U/en active Active
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