CN214787376U - Cast-in-place and prefabricated tunnel shaft inner wall structure that combines together - Google Patents
Cast-in-place and prefabricated tunnel shaft inner wall structure that combines together Download PDFInfo
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- CN214787376U CN214787376U CN202120373962.7U CN202120373962U CN214787376U CN 214787376 U CN214787376 U CN 214787376U CN 202120373962 U CN202120373962 U CN 202120373962U CN 214787376 U CN214787376 U CN 214787376U
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Abstract
The utility model belongs to the field of underground engineering, in particular to a cast-in-place and prefabricated assembly combined tunnel shaft inner wall structure, which comprises a single-layer mold lining and a prefabricated assembly type shaft inner wall, wherein the single-layer mold lining and the prefabricated assembly type shaft inner wall are both in a tubular shape; the inner walls of the single-layer molded lining and the prefabricated vertical shaft are both cylindrical; and the single-layer molded lining and the inner wall of the prefabricated assembled shaft are connected up and down. The structure can adapt to different stratums, improves the construction efficiency, realizes the quick support of the well wall, effectively shortens the construction period, improves the mechanical construction degree, and ensures the safety of constructors.
Description
Technical Field
The utility model belongs to the underground works field, concretely relates to tunnel shaft inner wall structure that cast-in-place and prefabricated assembly combined together.
Background
With the rapid development of the infrastructure of China, some experience has been accumulated in the construction of tunnels in areas with complex geological conditions of high mountains and high mountains, however, for the excavation of long and large deep vertical shafts, most construction methods still refer to the excavation mode of coal mines, the well wall adopts a composite lining, and the primary support adopts a steel arch frame and a spray anchoring net structure. The existing deep shaft excavation method commonly used in China is a long-section one-way operation method, and the method has the advantages of long construction period, low efficiency and high manufacturing cost. The method has the advantages of few working procedures, no initial anchor-shotcrete support, one-step well construction and great shortening of the construction period. However, for the excavation of a large-section deep shaft in a region with complex geological conditions, if only a short-section lining digging mode is adopted to construct the inner wall of the shaft, when the self-stability is poor, the stress release is fast, and a rock stratum is broken, particularly for a stratum rich in underground water, the stability and the safety of a rock wall during the process of constructing the lining are difficult to ensure, and the molding quality of the cast concrete is difficult to ensure.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem, the utility model aims to provide a tunnel shaft inner wall structure that cast-in-place and prefabricated assembly combined together. The structural form of the inner wall of the vertical shaft is selected according to different stratum conditions, so that the construction period can be shortened, the manufacturing cost can be reduced, and the rock wall exposure time under severe geological conditions can be shortened, thereby ensuring the stability of the vertical shaft and the safety of operators.
The technical scheme of the utility model: a tunnel vertical shaft inner wall structure combining cast-in-place and prefabricated assembly comprises a single-layer molded lining and a prefabricated assembly type vertical shaft inner wall, wherein the single-layer molded lining and the prefabricated assembly type vertical shaft inner wall are both cylindrical; the single-layer mold-built lining is connected with the inner wall of the prefabricated assembled shaft up and down.
The end face of the single-layer molded lining connected with the inner wall of the prefabricated assembly type vertical shaft is evenly distributed with a plurality of connecting reinforcing steel bars, the end face of the inner wall of the prefabricated assembly type vertical shaft connected with the single-layer molded lining is evenly distributed with a plurality of reinforcing steel bar holes, and the single-layer molded lining is inserted into the reinforcing steel bar holes through the connecting reinforcing steel bars and fixedly connected with the inner wall of the prefabricated assembly type vertical shaft.
An annular water stop strip is arranged between the single-layer mold-built lining and the inner wall of the prefabricated assembled shaft, and the cross section of the water stop strip is L-shaped.
The inner wall of the prefabricated vertical shaft is of a cylindrical structure surrounded by a plurality of arc-shaped pipe pieces; and the pipe piece is provided with a positioning hole, and the inner wall of the prefabricated vertical shaft penetrates through the positioning hole through a positioning steel pipe to be fixed on the vertical shaft.
The arc-shaped pipe pieces are connected into a whole through a plurality of connecting bolts.
A hand hole is arranged at the edge of the surface of the inner wall of each segment, and a bolt hole communicated with the hand hole is correspondingly arranged in the inner wall at the edge; the connecting bolt penetrates through the bolt holes of two adjacent segments, and two ends of the connecting bolt are fixed in the hand holes of the two adjacent segments; the number of the hand holes and the bolt holes corresponds to the number of the connecting bolts.
And a rubber sealing gasket is arranged at the caulking joint between two adjacent pipe pieces.
And the surface of the inner wall of each segment is also provided with a grouting hole, and the positioning steel pipe is a steel perforated pipe.
The utility model has the advantages that: the utility model provides a tunnel shaft inner wall structure combining cast-in-place and prefabricated assembly, when the ground floor condition is good, the integral type mold concrete lining can be adopted, the construction progress is accelerated, and the cost is saved; when stratum conditions are relatively poor, the prefabricated assembled segment lining structure type can be adopted, quick support is realized, strong support is provided in time, and the stability of a well wall is ensured.
This structure has the following advantages: 1) the construction mode of the inner wall of the vertical shaft is selected according to different stratum conditions, so that the construction period can be shortened to a certain extent, and the cost is reduced; 2) the prefabricated vertical shaft inner wall is adopted in the rock stratum crushing or breaking section, so that the exposure time of the vertical shaft rock stratum is greatly reduced, the risk coefficient of pit wall collapse and water inrush is reduced, and the safety of constructors is guaranteed; 3) and the inner wall of the prefabricated vertical shaft is adopted, so that the construction mechanization degree is improved, and unnecessary labor force is reduced.
Drawings
The following further describes the implementation method of the present invention with reference to the drawings, but the implementation method is not limited to the present invention.
Fig. 1 is a sectional view of the inner wall structure of the tunnel shaft of the present invention;
fig. 2 is a schematic cross-sectional view of an inner wall of a prefabricated shaft;
FIG. 3 is a partial enlarged view of FIG. 2A;
fig. 4 is a schematic front view of the inner wall of the prefabricated assembled shaft;
1. a relatively stable formation; 2. a formation fracture or fracture zone; 3. building a lining by a single-layer mold; 4. quick-setting rubber waterproof material; 5. a water stop bar; 6. prefabricating the inner wall of the assembled shaft; 7. positioning the steel pipe; 8. a connecting bolt; 9. grouting a layer behind the wall; 10. reinforcing steel bar holes; 11. caulking; 12. a rubber gasket; 13. hand hole; 14. bolt holes; 15. positioning holes; 16. and (4) grouting holes.
Detailed Description
Example 1
As shown in fig. 1, the tunnel shaft inner wall structure combining cast-in-place and prefabricated assembly comprises a single-layer molded lining 3 and a prefabricated assembled shaft inner wall 6, wherein the single-layer molded lining 3 and the prefabricated assembled shaft inner wall 6 are both cylindrical; the single-layer molded lining 3 is connected with the inner wall 6 of the prefabricated vertical shaft up and down.
Further, in a formation zone with good stability, namely: in the relatively stable stratum 1 area of the shaft, the inner wall support of the shaft adopts the integral structure form of the single-layer molded lining 3; in the sections with poor self-stability such as broken rock zones or fractured zones, namely: in the area of the rock stratum crushing or fracture zone 2, the inner wall support of the vertical shaft adopts the structure form of the prefabricated vertical shaft inner wall 6.
Further, as shown in fig. 2, a plurality of connecting steel bars are uniformly distributed on the connecting end surface of the single-layer modular lining 3, a plurality of steel bar holes 10 are uniformly distributed on the connecting end surface of the prefabricated assembly type shaft inner wall 6, and the single-layer modular lining 3 is fixedly connected with the prefabricated assembly type shaft inner wall 6 by inserting the connecting steel bars into the steel bar holes 10, so that the connectivity and integrity of the prefabricated assembly type shaft inner wall 6 and the single-layer modular lining 3 are improved. The connecting reinforcing steel bars and the reinforcing steel bar holes are reserved in advance.
Further, as shown in fig. 1, an annular water stop strip 5 is arranged between the single-layer molded lining 3 and the prefabricated assembled shaft inner wall 6, the cross section of the water stop strip 5 is in an L shape and is mainly used for water plugging, and a quick-setting rubber waterproof material 4 is filled in a joint to improve the waterproof sealing effect.
Example 2
On the basis of the embodiment 1, as shown in fig. 1 and 4, further, the prefabricated assembled shaft inner wall 6 is a cylindrical structure surrounded by a plurality of arc-shaped pipe segments; the duct piece is provided with a positioning hole 15, and the prefabricated assembly type shaft inner wall 6 penetrates through the positioning hole 15 through a positioning steel pipe 7 to be fixed on the rock wall of the shaft. The positioning steel pipe 7 is anchored in the rock wall before the prefabricated vertical shaft inner wall 6 is installed, then the prefabricated vertical shaft inner wall 6 is hoisted in place, and the other end of the positioning steel pipe 7 penetrates through the positioning hole 15 in the prefabricated vertical shaft inner wall to realize positioning of the prefabricated vertical shaft inner wall 6. The positioning steel pipe 7 mainly plays a role in positioning and supporting the duct piece of the prefabricated assembly type shaft inner wall 6 stably.
Furthermore, the arc-shaped pipe pieces are connected into a whole through a plurality of connecting bolts 8.
Further, as shown in fig. 3 and 4, a hand hole 13 is arranged at the edge of the inner wall surface of each segment, and a bolt hole 14 communicated with the hand hole 13 is correspondingly arranged in the inner wall at the edge; the connecting bolts 8 pass through the bolt holes 14 of two adjacent segments and are fixed at both ends in the hand holes 13 of the two adjacent segments. The number of hand holes 13 and bolt holes 14 corresponds to the number of attachment bolts 8. Wherein the diameter of the connecting bolt 8 is smaller than the bolt hole diameter;
further, a rubber sealing gasket 12 is arranged at a caulking joint 11 between two adjacent pipe pieces, and the effect of buffering and sealing is achieved.
Furthermore, the inner wall surface of each segment is also provided with a grouting hole 16, and the positioning steel pipe 7 is a steel flower pipe; and (3) performing the backfill grouting on the inner wall 6 of the prefabricated assembled shaft through the grouting holes 16 and the positioning steel pipes 7 to form a backfill grouting layer 9.
Example 3
On the basis of embodiment 2, the construction method of the tunnel vertical shaft inner wall structure combining cast-in-place and prefabricated assembly comprises the following steps:
step 1) adopting a single-layer mold building lining 3 to form a shaft support in a relatively stable stratum 1 area of a shaft; connecting steel bars are reserved on the end face of the single-layer molded lining 3 connected with the inner wall 6 of the fabricated shaft; in the embodiment, connecting steel bars are reserved on the lower end face of a single-layer molded lining 3;
step 2) connecting a plurality of arc-shaped pipe pieces into a cylindrical structure through connecting bolts 8, namely an assembled shaft inner wall 6, wherein the cylindrical structure is formed by connecting a plurality of pipe pieces into a one-ring or multi-ring structure; reserving a reinforcing steel bar hole 10 on the inner wall 6 of the assembled vertical shaft;
step 3) inserting the reserved connecting steel bars of the single-layer molded lining 3 in the step 1) into the reserved steel bar holes 10 of the inner wall 6 of the fabricated shaft to fix the single-layer molded lining 3 and the inner wall 6 of the fabricated shaft together, wherein the inner wall 6 of the fabricated shaft is positioned in the region of the rock stratum broken or fractured zone 2 of the shaft and is used for shaft support of the region;
step 4), fixing the inner wall 6 of the assembled vertical shaft on the vertical shaft through a positioning steel pipe 7;
and 5) grouting holes 16 are formed in the inner wall 6 of the assembled shaft, the positioning steel pipes 7 are steel perforated pipes, and after the assembling shaft inner wall 6 is installed on the inner wall of the shaft, grouting is timely performed on the wall through the grouting holes 16 and the positioning steel pipes 7 to form a wall post-grouting layer 9, so that the effects of sealing surrounding rock cracks, reinforcing surrounding rocks and stopping water are achieved.
The utility model discloses well individual layer mould is built lining cutting 3 and 6 these two kinds of structures of prefabricated assembled shaft inner wall, and the individual layer mould is built and is used in the good section of geology, and the section of jurisdiction is used in the not good section of geology, realizes wanting quick support. The single-layer mold building lining 3 and the prefabricated assembled shaft inner wall 6 are arranged up and down according to actual conditions.
The utility model discloses this kind of cast-in-place tunnel shaft inner wall structure that combines together with prefabricated assembly can be nimble application in the tunnel shaft that geological conditions complex area was built, seals the cyclization fast in the steady section of broken volatile, has both shortened the time limit for a project, has guaranteed the safety of construction again, can also reduce the cost to a certain extent.
The components and structures of the present embodiments that are not described in detail are well known in the art and do not constitute essential structural elements or elements.
Claims (8)
1. The utility model provides a cast-in-place and prefabricated tunnel shaft inner wall structure who combines together which characterized in that: the prefabricated vertical shaft lining structure comprises a single-layer mold building lining (3) and a prefabricated assembly type vertical shaft inner wall (6), wherein the single-layer mold building lining (3) and the prefabricated assembly type vertical shaft inner wall (6) are both cylindrical; the single-layer mold building lining (3) is connected with the inner wall (6) of the prefabricated assembled shaft up and down.
2. A cast-in-place and prefabricated assembled tunnel shaft inner wall structure as claimed in claim 1, wherein: the even cloth of terminal surface that is connected of individual layer mould building lining (3) and prefabricated assembled shaft inner wall (6) have a plurality of connecting reinforcement, the even cloth of terminal surface that prefabricated assembled shaft inner wall (6) and individual layer mould building lining (3) are connected has a plurality of reinforcing bar holes (10), individual layer mould building lining (3) are pegged graft in reinforcing bar hole (10) through connecting reinforcement and are in the same place with prefabricated assembled shaft inner wall (6) fixed connection.
3. A cast-in-place and prefabricated assembled tunnel shaft inner wall structure as claimed in claim 1, wherein: an annular water stop bar (5) is arranged between the single-layer mold building lining (3) and the prefabricated assembly type vertical shaft inner wall (6), and the cross section of the water stop bar (5) is L-shaped.
4. A cast-in-place and prefabricated assembled tunnel shaft inner wall structure as claimed in claim 1, wherein: the prefabricated vertical shaft inner wall (6) is a cylindrical structure surrounded by a plurality of arc-shaped pipe pieces; the pipe sheet is provided with a positioning hole (15), and the inner wall (6) of the prefabricated vertical shaft passes through the positioning hole (15) through a positioning steel pipe (7) to be fixed on the vertical shaft.
5. A cast-in-place and prefabricated assembled tunnel shaft inner wall structure as claimed in claim 4, wherein: the arc-shaped pipe pieces are connected into a whole through a plurality of connecting bolts (8).
6. A cast-in-place and prefabricated assembled tunnel shaft inner wall structure as claimed in claim 5, wherein: a hand hole (13) is arranged at the edge of the inner wall surface of each segment, and a bolt hole (14) communicated with the hand hole (13) is correspondingly arranged in the inner wall at the edge; the connecting bolt (8) passes through the bolt holes (14) of two adjacent segments, and the two ends of the connecting bolt are fixed in the hand holes (13) of the two adjacent segments; the number of the hand holes (13) and the bolt holes (14) corresponds to the number of the connecting bolts (8).
7. A cast-in-place and prefabricated assembled tunnel shaft inner wall structure as claimed in claim 4, wherein: and a rubber sealing gasket (12) is arranged at a caulking joint (11) between two adjacent pipe pieces.
8. A cast-in-place and prefabricated assembled tunnel shaft inner wall structure as claimed in claim 4, wherein: and the surface of the inner wall of each segment is also provided with a grouting hole (16), and the positioning steel pipe (7) is a steel flower pipe.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120373962.7U CN214787376U (en) | 2021-02-18 | 2021-02-18 | Cast-in-place and prefabricated tunnel shaft inner wall structure that combines together |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120373962.7U CN214787376U (en) | 2021-02-18 | 2021-02-18 | Cast-in-place and prefabricated tunnel shaft inner wall structure that combines together |
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| CN214787376U true CN214787376U (en) | 2021-11-19 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112814684A (en) * | 2021-02-18 | 2021-05-18 | 中交第二公路工程局有限公司 | Cast-in-place and prefabricated assembly combined tunnel shaft inner wall structure and construction method |
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2021
- 2021-02-18 CN CN202120373962.7U patent/CN214787376U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112814684A (en) * | 2021-02-18 | 2021-05-18 | 中交第二公路工程局有限公司 | Cast-in-place and prefabricated assembly combined tunnel shaft inner wall structure and construction method |
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