CN214062998U - Prestressed steel supporting structure in tunnel at contact channel - Google Patents
Prestressed steel supporting structure in tunnel at contact channel Download PDFInfo
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- CN214062998U CN214062998U CN202022554572.8U CN202022554572U CN214062998U CN 214062998 U CN214062998 U CN 214062998U CN 202022554572 U CN202022554572 U CN 202022554572U CN 214062998 U CN214062998 U CN 214062998U
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Abstract
The utility model discloses a contact passageway department prestressing force steel bearing structure in tunnel, this prestressing force steel bearing structure sets up respectively in the tunnel of contact passageway both sides, prestressing force steel bearing structure is including installing two pin C font support frames in the opening ring canal piece in tunnel and installing two pin octagon support frames in the ring canal piece at the vertical both ends of split ring section of jurisdiction, be connected through shaped steel between C font support frame and octagon support frame, C font support frame is supported on the internal face of split ring section of jurisdiction through a plurality of jacks and a plurality of supports, octagon support frame is supported on the internal face of ring section of jurisdiction through a plurality of jacks and a plurality of supports. The utility model has the advantages that: the defect of unsupported reinforcement of split rings in the existing engineering is overcome by arranging a prestressed steel supporting structure system in the tunnel at the position of the communication channel.
Description
Technical Field
The utility model belongs to the technical field of the technique of tunnel construction and specifically relates to a contact passageway department prestressing force steel bearing structure in tunnel.
Background
In a water-rich soft soil stratum, a freezing method is an important method for the engineering construction of the contact channel of the interval tunnel, and prestressed steel supports are arranged in second rings on two sides of the center of the contact channel before the contact channel is excavated according to the current regulations. Because the opening of the communication channel needs to be provided with a protective door and the freezing pipelines are dense, the two ring pipe pieces with the openings cannot be supported and reinforced, and certain hidden trouble is left for engineering.
Disclosure of Invention
The utility model aims at providing a prestressing force steel bearing structure in contact passageway department tunnel according to above-mentioned prior art not enough, through set up C font support frame and octagon support frame in contact passageway department tunnel, compensate existing engineering split ring and do not have the reinforced not enough of support.
The utility model discloses the purpose is realized accomplishing by following technical scheme:
the utility model provides a contact tunnel department tunnel prestressing force steel bearing structure which characterized in that: the prestress steel supporting structures are respectively arranged in tunnels on two sides of the communication channel, each prestress steel supporting structure comprises two C-shaped supporting frames arranged in opening ring pipe pieces of the tunnels and two octagonal supporting frames arranged in ring pipe pieces at two longitudinal ends of the split ring pipe piece, the C-shaped supporting frames and the octagonal supporting frames are connected through section steel, the C-shaped supporting frames are supported on the inner wall surface of the split ring pipe piece through a plurality of jacks and a plurality of supports, and the octagonal supporting frames are supported on the inner wall surface of the ring pipe piece through a plurality of jacks and a plurality of supports.
In the tunnel on each side, two octagonal support frames are longitudinally connected through at least four channel steel which are uniformly arranged up and down, and the two C-shaped support frames are arranged among the four channel steel.
The opening of the C-shaped support frame faces towards a reserved opening which is formed in the opening ring pipe piece and connected with the communication channel, and the upper edge and the lower edge of the opening of the C-shaped support frame are longitudinally connected with the octagonal support frame through the first section steel and the second section steel of the section steel respectively.
The three corners of the upper portion of the octagonal support frame are respectively provided with one jack, the two corners of the middle portion of the octagonal support frame are respectively provided with one jack, the three corners of the bottom portion of the octagonal support frame are respectively provided with one support, the upper portion of the C-shaped support frame is provided with three jacks, the middle portion of the C-shaped support frame is provided with one jack, and the bottom portion of the C-shaped support frame is provided with three supports.
And a steel gasket is arranged between the jack and the inner wall surface of the tunnel.
The utility model has the advantages that: the defect of unsupported reinforcement of split rings in the existing engineering is overcome by arranging a prestressed steel supporting structure system in the tunnel at the position of the communication channel.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a cross-sectional view A-A of FIG. 1;
FIG. 3 is a cross-sectional view B-B of FIG. 1;
FIG. 4 is a cross-sectional view of C-C of FIG. 1;
FIG. 5 is a cross-sectional view of D-D of FIG. 1;
FIG. 6 is a schematic structural view of the C-shaped support frame of the present invention;
fig. 7 is a schematic structural view of the octagonal support frame of the present invention.
Detailed Description
The features of the present invention and other related features are described in further detail below by way of example in conjunction with the accompanying drawings to facilitate understanding by those skilled in the art:
as shown in fig. 1-7, the scores are represented as: c font support frame 1, octagon support frame 2, contact passageway 3, split ring section of jurisdiction 4, reserve mouthful 5, first shaped steel 6, second shaped steel 7, tunnel segment of jurisdiction 8, channel-section steel 9, jack 10, support 11, strong point a, strong point b, strong point C, strong point d.
Example (b): as shown in fig. 1 to 7, the present embodiment mainly includes a C-shaped support frame 1 and an octagonal support frame 2, and both the C-shaped support frame 1 and the octagonal support frame 2 are installed in tunnels on both sides of the communication channel 3 for supporting the tunnels. In the tunnel of each side, two C-shaped support frames 1 are arranged at the position of the split ring pipe piece 4, the opening of each C-shaped support frame 1 faces to a reserved opening 5 on the split ring pipe piece 4, and the reserved opening 5 is communicated with the communication channel 3. The upper edge and the lower edge of the opening of the C-shaped support frame 1 are longitudinally connected to the octagonal support frame 2 through a first section steel 6 and a second section steel 7 respectively. C font support frame 1 is connected with octagonal support frame 2, can shift the pressure of the split ring section of jurisdiction 4 department of contact passageway 3 to C font support frame 1 and octagonal support frame 2, undertake jointly by both, has guaranteed the safety of the split ring section of jurisdiction 4 department of contact passageway 3 firmly. In addition, the design of C font support frame 1, the split ring section of jurisdiction 4 that occupies contact passageway 3 is less in area, is convenient for install guard gate and each freezes pipe salt water pipeline etc..
As shown in fig. 1 to 5, the two octagonal support frames 2 are respectively installed on the ring pipe pieces (without opening on the side walls) at the two longitudinal ends of the split ring pipe piece 4 of the communication channel 3, the two octagonal support frames 2 are longitudinally connected through four channel steel 9, the four channel steel 9 are respectively and uniformly arranged up and down in pairs, the two octagonal support frames 2 can be connected and reinforced, the integrity of the two octagonal support frames 2 is ensured, and the two octagonal support frames 2 are better fixed in the tunnel pipe piece 8. In addition, C font support frame 1 can be located between four channel-section steel 9, and the upper and lower face of C font support frame 1 can respectively with the lower face of upper portion channel-section steel 9, the higher authority welded fastening of lower part channel-section steel 9 promptly, and channel-section steel 9 can play the effect of location C font support frame 1, and the installation of the C font support frame 1 of being convenient for is fixed.
As shown in fig. 2 to 7, the octagonal support frame 2 is fixed on the inner wall of the ring segment by 5 support points C and 3 support points d, and the C-shaped support frame 1 is fixed on the inner wall of the split ring segment 4 by 4 support points a and 3 support points b. Wherein, 5 supporting points c are respectively arranged on three corners at the upper part of the octagonal supporting frame 2 and two corners at the middle part of the octagonal supporting frame 2, a jack 10 is respectively arranged on the 5 supporting points c, 3 supporting points d are respectively arranged on three corners at the bottom of the octagonal supporting frame 2, and a support 11 is respectively arranged on the 3 supporting points d; the upper portion of C font support frame 1 is equipped with 3 strong points an, the middle part is equipped with 1 strong point a, all is equipped with a jack 10 on 4 strong points a, and the bottom of C font support frame 1 is equipped with 3 strong points b, all is equipped with a support 11 on 3 strong points b. Because the jacks 10 and the supports 11 on the octagonal support frame 2 and the C-shaped support frame 1 are uniformly arranged, the pressure of the tunnel can be uniformly distributed on the octagonal support frame 2 and the C-shaped support frame 1, and the uniform stress of the octagonal support frame 2 and the C-shaped support frame 1 is ensured. Specifically, the support 11 is used for mounting the octagonal support frame 2 and the C-shaped support frame 1; when the jack 10 is arranged at the 5 supporting points C (the 4 supporting points a) at the middle and upper parts of the octagonal supporting frame 2 (the C-shaped supporting frame 1) at the middle and upper parts, the maximum jacking force of the jack 10 is 500kN so as to adjust the supporting force; after the tunnel support is installed, each jack 10 applies prestress, the jacking force of each jack 10 is greater than 0KN and less than or equal to 100KN, and the jacking force of each jack 10 is uniform; in the construction process of the communication channel, the jacking force of each jack 10 is adjusted according to the measured convergence deformation of the tunnel, and the jacking force of the jack 10 is increased at the position with large convergence. In addition, a steel gasket with the thickness not less than 16mm is arranged between the jack 10 and the inner wall of the tunnel segment 8 so as to reduce the extrusion of the jack 10 on the tunnel segment 8, and the supporting force provided by each supporting point (supporting point a, supporting point b, supporting point c and supporting point d) is not less than 500 kN.
In this embodiment, the octagonal support frame 2 is made of wide-flange section steel of HW200 × 200, the C-shaped support frame 1 is made of wide-flange section steel of HW300 × 300, the channel steel 9 is made of No. 20 channel steel, the first section steel 6 is made of section steel of HM588 × 300, and the second section steel 7 is made of section steel of HW300 × 300. The material selection of each part of this embodiment not only can guarantee its tunnel prestressing force and support holistic steadiness, still is convenient for the stable connection between each part. In addition, the tunnel prestressed support is preferably installed before the ring crossing of the freezing wall, and the opening position of the local freezing hole and the position of the support point of the return-circuit-removing rubber hose are kept away from the C-shaped support frame 1.
In addition, as shown in fig. 1 to 7, the present embodiment further includes an installation method, which includes the following steps:
a. according to the actual construction condition, the tunnel prestressed supports (the octagonal support frame 2 and the C-shaped support frame 1) can be simultaneously and respectively installed in the tunnels at the two sides of the connecting channel 3, so that the construction speed is high; during installation, firstly, the octagonal support frames 2 are respectively installed at the centers of tunnel segments 8 on the two sides of a split ring segment 4 of a communication channel 3, the octagonal support frames 2 are pre-fixed on the inner wall of the tunnel segment 8 through jacks 10 and supports 11 on eight corners of the octagonal support frames, at the moment, the jacking force of the jacks 10 is not too large, the tunnel segments are jacked tightly, and two channel steel 9 are respectively installed on the upper portion and the lower portion of the inner wall of the octagonal support frames 10 to connect the two octagonal support frames 2 together;
b. the method comprises the following steps that C-shaped support frames 1 are respectively installed on two sides of a reserved opening 5 of an open ring pipe piece 4 of a communication channel 3, the C-shaped support frames 1 are pre-fixed on the inner wall of a tunnel pipe piece 8 through jacks 10 and supports 11 on the C-shaped support frames 1, during installation, the opening of each C-shaped support frame 1 faces the reserved opening 5 of the open ring pipe piece 4 of the communication channel 3, and first section steel 6 and second section steel 7 are respectively installed on the upper edge and the lower edge of the opening of each C-shaped support frame 1 and are used for connecting the C-shaped support frames 1 and an octagonal support frame 2;
c. after the octagonal support frame 2 and the C-shaped support frame 1 are installed, all the jacks 10 on the octagonal support frame 2 and the C-shaped support frame 1 are jacked on the inner wall of the tunnel segment 8, the jacking force of each jack 10 is not larger than 100kN, the jacking force of each jack 10 is uniform, in addition, the jacking force of each jack 10 is adjusted according to actual tunnel convergence deformation, the part with large convergence requires that the jacking force of the jack 10 is large, and the part with no convergence 10 is jacked tightly.
In summary, in the embodiment, the defect of unsupported reinforcement of the split ring in the existing engineering is overcome by arranging the prestressed steel support structure systems (the octagonal support frame 2 and the C-shaped support frame 1) in the tunnel at the position of the communication channel.
Claims (5)
1. The utility model provides a contact tunnel department tunnel prestressing force steel bearing structure which characterized in that: the prestress steel supporting structures are respectively arranged in tunnels on two sides of the communication channel, each prestress steel supporting structure comprises two C-shaped supporting frames arranged in opening ring pipe pieces of the tunnels and two octagonal supporting frames arranged in ring pipe pieces at two longitudinal ends of the split ring pipe piece, the C-shaped supporting frames and the octagonal supporting frames are connected through section steel, the C-shaped supporting frames are supported on the inner wall surface of the split ring pipe piece through a plurality of jacks and a plurality of supports, and the octagonal supporting frames are supported on the inner wall surface of the ring pipe piece through a plurality of jacks and a plurality of supports.
2. The prestressed steel supporting structure for the tunnel at the communication passage as claimed in claim 1, wherein: in the tunnel on each side, two octagonal support frames are longitudinally connected through at least four channel steel which are uniformly arranged up and down, and the two C-shaped support frames are arranged among the four channel steel.
3. The prestressed steel supporting structure for the tunnel at the communication passage as claimed in claim 1, wherein: the opening of the C-shaped support frame faces towards a reserved opening which is formed in the opening ring pipe piece and connected with the communication channel, and the upper edge and the lower edge of the opening of the C-shaped support frame are longitudinally connected with the octagonal support frame through the first section steel and the second section steel of the section steel respectively.
4. The prestressed steel supporting structure for the tunnel at the communication passage as claimed in claim 1, wherein: the three corners of the upper portion of the octagonal support frame are respectively provided with one jack, the two corners of the middle portion of the octagonal support frame are respectively provided with one jack, the three corners of the bottom portion of the octagonal support frame are respectively provided with one support, the upper portion of the C-shaped support frame is provided with three jacks, the middle portion of the C-shaped support frame is provided with one jack, and the bottom portion of the C-shaped support frame is provided with three supports.
5. The prestressed steel supporting structure for the tunnel at the communication passage as claimed in claim 1, wherein: and a steel gasket is arranged between the jack and the inner wall surface of the tunnel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022554572.8U CN214062998U (en) | 2020-11-08 | 2020-11-08 | Prestressed steel supporting structure in tunnel at contact channel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022554572.8U CN214062998U (en) | 2020-11-08 | 2020-11-08 | Prestressed steel supporting structure in tunnel at contact channel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214062998U true CN214062998U (en) | 2021-08-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202022554572.8U Active CN214062998U (en) | 2020-11-08 | 2020-11-08 | Prestressed steel supporting structure in tunnel at contact channel |
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| CN (1) | CN214062998U (en) |
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- 2020-11-08 CN CN202022554572.8U patent/CN214062998U/en active Active
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