CN220468928U - Filling type hidden karst cave reinforcing structure of rock wall crane beam part - Google Patents
Filling type hidden karst cave reinforcing structure of rock wall crane beam part Download PDFInfo
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- CN220468928U CN220468928U CN202321646023.0U CN202321646023U CN220468928U CN 220468928 U CN220468928 U CN 220468928U CN 202321646023 U CN202321646023 U CN 202321646023U CN 220468928 U CN220468928 U CN 220468928U
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- crane beam
- karst cave
- rock wall
- rock
- wall crane
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- 239000011435 rock Substances 0.000 title claims abstract description 115
- 230000003014 reinforcing effect Effects 0.000 title claims abstract description 17
- 238000007596 consolidation process Methods 0.000 claims description 14
- 239000004570 mortar (masonry) Substances 0.000 claims description 13
- 238000004873 anchoring Methods 0.000 claims description 11
- 239000000945 filler Substances 0.000 claims description 5
- 238000010276 construction Methods 0.000 description 8
- 238000009412 basement excavation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 239000004927 clay Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
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- Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
Abstract
The utility model provides a filling type hidden karst cave reinforcing structure of a rock wall crane beam part, which is characterized in that a pilot tunnel and a pilot shaft are dug in a drainage gallery at the periphery of an underground plant hole, the pilot tunnel and the pilot shaft are communicated with the filling type hidden karst cave at the periphery of the rock wall crane beam part of a target operation area of the underground plant hole, the filling type hidden karst cave empties the filling of the karst cave in the filling type hidden karst cave, and backfill concrete is filled together with the pilot tunnel and the pilot shaft; the rock wall crane beam part comprises a rock wall crane beam and a rock wall crane beam wall attachment wall arranged below the rock wall crane beam. The utility model can reduce the relaxation of surrounding rock when the rock wall crane beam part is excavated, and ensure the bearing capacity of the surrounding rock of the rock wall crane beam part as much as possible; and the rock wall crane beam, the wall attached wall of the rock wall crane beam, surrounding rock and backfill concrete are anchored and extruded together to form a combined bearing structure, so that the stability of the surrounding rock of the underground factory building and the structural safety of the rock wall crane beam are effectively ensured.
Description
Technical Field
The utility model relates to the technical field of underground factory building excavation support, in particular to a filling type hidden karst cave reinforcing structure of a rock wall crane beam part.
Background
The supporting structure of the internal bridge machine of the hydropower station underground powerhouse is widely of a rock wall crane beam structure type, the span of the underground powerhouse can be reduced, the crane is put into operation in advance, the construction period is effectively shortened, and the construction cost is reduced. Because the crane wheel pressure load of the hydropower station underground factory building is larger, under the geological condition that the filling type hidden karst cave develops, the rock wall crane girder foundation is difficult to meet the bearing capacity requirement. In addition, the filling type hidden karst cave can damage the integrity of surrounding rocks of the underground powerhouse, reduce the mechanical property of a structural surface, and seriously endanger the stability of the surrounding rocks of the underground powerhouse due to the influence of the wheel pressure load of a superposed crane.
Therefore, the filling type hidden karst cave at the position of the rock wall crane beam is reinforced, and the bearing capacity of the rock wall crane beam is ensured, so that the stability of surrounding rocks of an underground factory building and the structural safety of the rock wall crane beam are ensured.
Disclosure of Invention
The utility model aims to provide a reinforcing structure capable of ensuring the bearing capacity and the safety of a crane beam on the rock wall of an underground factory building. For this purpose, the utility model adopts the following technical scheme:
a filled hidden karst cave reinforcing structure of a rock wall crane girder part is characterized in that a pilot tunnel and a pilot shaft are dug in a drainage gallery at the periphery of an underground plant hole, the pilot tunnel and the pilot shaft are communicated with the filled hidden karst cave at the periphery of the rock wall crane girder part of a target operation area of the underground plant hole, the filled hidden karst cave empties the filling of the inside karst cave and is filled with backfill concrete together with the pilot tunnel and the pilot shaft to form pretreatment for improving the bearing capacity of the rock wall crane girder part; the rock wall crane beam part comprises a rock wall crane beam and a rock wall crane beam wall attachment wall arranged below the rock wall crane beam, and an anchoring supporting structure is arranged between the rock wall crane beam part and surrounding rocks in the filling type hidden karst cave area so as to form a combined bearing structure, so that the filling type hidden karst cave provides a stable supporting foundation for the rock wall crane beam part.
Further: gao Chengjun of the pilot tunnel and the pilot well is higher than the top elevation of the filling type hidden karst cave.
Further: and the backfill concrete is connected with the filled type hidden karst cave, the guide hole and the rock wall of the guide well, and dowel bars are arranged on the backfill concrete.
Further: the anchoring supporting structure comprises a common mortar anchor rod and consolidation grouting, wherein the common mortar anchor rod and the consolidation grouting are arranged between a wall attaching wall of a rock wall crane beam and surrounding rocks of a filling type hidden karst cave area, and are arranged at intervals.
Further: and grouting holes are formed in the filling type hidden karst cave by consolidation grouting, and the depth of the grouting holes is larger than the boundary of the filling type hidden karst cave far away from the side wall of the underground plant cave.
Further: and a tension anchor rod of the rock wall crane beam is arranged between the rock wall crane beam and the backfill concrete in the pilot tunnel in a supporting way.
Further: and at least one row of prestressed anchor cables are arranged on the wall attached to the rock wall crane beam, and the anchoring supporting structure is arranged between the adjacent rows of prestressed anchor cables.
Further: and the wall-attached wall of the rock wall crane beam relatively covers the height range of the filling type hidden karst cave.
Compared with the prior art, the utility model has the following beneficial effects:
according to the utility model, the filling type hidden karst cave is cleaned in advance, and backfill concrete is poured into the filling type hidden karst cave, so that the loose of surrounding rock when the rock wall crane beam part is excavated is reduced as much as possible, and the bearing capacity of the surrounding rock of the rock wall crane beam part is ensured as much as possible; the filling type hidden karst cave treatment does not occupy the excavation construction period of the underground factory building, and is beneficial to ensuring the engineering progress. And the rock wall crane beam, the wall attached wall of the rock wall crane beam, surrounding rock and backfill concrete are anchored and extruded together to form a combined bearing structure, so that the stability of the surrounding rock of the underground factory building and the structural safety of the rock wall crane beam are effectively ensured.
Drawings
FIG. 1 is an overall floor plan of the present utility model;
FIG. 2 is an overall cross-sectional layout view of the present utility model at a first view;
fig. 3 is an overall cross-sectional layout view of a second view of the present utility model.
The marks in the drawings are: 1-underground factory building hole, 101-rock wall crane beam part, 2-drainage gallery, 3-pilot hole and pilot well, 4-filling type hidden karst cave, 401-karst cave filling, 5-backfill concrete, 6-common mortar anchor rod, 7-consolidation grouting, 8-rock wall crane beam tension anchor rod, 9-rock wall crane beam wall attachment wall, 10-rock wall crane beam and 11-prestress anchor cable.
Detailed Description
The utility model is further illustrated by the following figures and examples, which are not intended to be limiting.
As shown in fig. 1-3, a filled hidden karst cave reinforcing structure of a rock wall crane beam part is formed by digging a pilot tunnel and a pilot well 3 in a drainage gallery 2 around an underground plant hole 1, wherein the pilot tunnel and the pilot well 3 are communicated with a filled hidden karst cave 4 around a rock wall crane beam part 101 of a target operation area of the underground plant hole 1, the filled hidden karst cave 4 empties a karst cave filler 401 in the filled hidden karst cave 4 and is filled with backfilled concrete 5 together with the pilot tunnel and the pilot well 3 to form pretreatment for improving the bearing capacity of the rock wall crane beam part 101; the rock wall crane beam part 101 comprises a rock wall crane beam 10 and a rock wall crane beam wall attachment wall 9 arranged below the rock wall crane beam 10, and an anchoring supporting structure is arranged between the rock wall crane beam part 101 and surrounding rocks in the area of the filling type hidden karst cave 4 so as to form a combined bearing structure, so that the filling type hidden karst cave 4 provides a stable supporting foundation for the rock wall crane beam part 101.
In this embodiment, for the filling type hidden karst cave 4 of the rock wall crane beam part 101, the soil in the filling type hidden karst cave 4 is dredged, so that the integrity of surrounding rocks of the underground plant 1 and the safety of the rock beam structure are ensured, and meanwhile, the construction safety of the reinforcing structure is easy to ensure, so that the whole progress of engineering is accelerated.
Specifically, the height Cheng Jungao of the pilot tunnel and the pilot shaft 3 is higher than the top of the filled type hidden karst cave 4, so that the situation that the karst cave filler 401 in the filled type hidden karst cave 4 collapses and gushes mud is prevented.
The karst cave filling material 401 can be cleaned after the guide hole and the guide well 3 are subjected to anchor spraying and supporting, and the bedrock surface can be cleaned after the karst cave filling material 401 is cleaned.
Specifically, the backfill concrete 5 is correspondingly connected with the rock walls of the filling type hidden karst cave 4, the pilot tunnel and the pilot shaft 3 by arranging dowel bars, the backfill concrete 5 is poured in layers, dowel bars are arranged between construction joints to be connected, and the dowel bar parameters can be C25@2m×2m, and L=3m. In this embodiment, after the backfill concrete 5 reaches the design strength, the rock wall crane beam portion 101 is excavated.
Specifically, the anchoring support structure comprises a common mortar anchor rod 6 and a consolidation grouting 7, wherein the common mortar anchor rod 6 and the consolidation grouting 7 are arranged between a wall-attached wall 9 of a rock wall crane beam and surrounding rock in the area of the filled type hidden karst cave 4, and a space is arranged between the common mortar anchor rod 6 and the consolidation grouting 7. Meanwhile, a plurality of groups of anchoring supporting structures can be arranged, and the anchoring supporting structures in each group are optimally arranged.
Wherein the support parameter of the common mortar anchor rod 6 is not lower than the system anchor rod parameter, and the extension of the common mortar anchor rod 6 into the wall-attached wall 9 of the rock wall crane beam is not less than 0.5m.
Wherein, the consolidation grouting 7 is provided with a grouting hole in the filling type hidden karst cave 4, and the depth of the grouting hole is larger than the boundary of the filling type hidden karst cave 4 far away from the side wall of the underground factory building cave 1. In the embodiment, the grouting pressure of the consolidation grouting 7 is 0.15-0.3 MPa, the row spacing between grouting holes is 2-3 m, and the grouting pressure is arranged at intervals with the common mortar anchor rod 6.
Specifically, a wall crane beam tension anchor rod 8 is supported and arranged between the wall crane beam 10 and the guide hole and backfill concrete 5 in the guide well 3. And the concrete of the tension anchor rod 8 of the rock wall crane beam, the wall attached wall 9 of the rock wall crane beam and the rock wall crane beam 10 is sequentially constructed, and the compression anchor rod of the rock wall crane beam is canceled.
The thickness of the wall-attached wall 9 of the rock wall crane beam is 0.5m-0.7m, the height is more than 3m, and the height range of the hidden karst cave 4 can be covered.
Specifically, at least one row of prestressed anchor cables 11 is arranged on the wall-attached wall 9 of the rock wall crane beam, and an anchoring supporting structure is arranged between the adjacent rows of prestressed anchor cables 11. The pre-stress anchor cable 11 can be drilled synchronously with the tension anchor rod 8 of the rock wall crane beam and concrete pouring, and the rock wall crane beam 10 is tensioned after the concrete reaches a certain age.
In the embodiment, the prestressed anchor cable 11 is a bonded prestressed anchor cable, the design load is 1500kN-2000kN, the length is 20m-25m, the elevation angle is 5-15 degrees, and the interval row distance is 3m-4.5m.
Referring to fig. 1-3, in the construction of the reinforcing structure, the specific construction method is as follows:
before the underground factory building 1 rock wall crane beam part 101 is excavated, excavating a pilot tunnel and a pilot shaft 3 in the direction of a clay filling type hidden karst cave 4 through a drainage gallery 2 around the underground factory building 1, dredging a karst cave filler 401 through the pilot tunnel and the pilot shaft 3, and filling backfilled concrete 5 into the filling type hidden karst cave 4, the pilot tunnel and the pilot shaft 3 after the karst cave filler 401 is dredged;
after backfilling concrete 5 reaches the design strength, excavating a rock wall crane beam part 101, supporting a common mortar anchor rod 6 and consolidation grouting 7 on surrounding rocks of a filling type hidden karst cave 4 area at the side wall of an underground factory building 1, then supporting a rock wall crane beam tension anchor rod 8, pouring a rock wall crane beam wall attachment wall 9 and a rock wall crane beam 10, and synchronously drilling a prestressed anchor cable 11;
and after the concrete of the rock wall crane beam 10 reaches a certain age, tensioning the prestressed anchor cable 11 to fix the rock wall crane beam wall attachment wall 9 on the rock wall of the underground plant 1, thereby completing the construction.
The above embodiment is only one preferred technical solution of the present utility model, and it should be understood by those skilled in the art that modifications and substitutions can be made to the technical solution or parameters in the embodiment without departing from the principle and essence of the present utility model, and all the modifications and substitutions are covered in the protection scope of the present utility model.
Claims (8)
1. Filling type hidden karst cave reinforcing structure of rock wall crane beam part, its characterized in that: digging a pilot tunnel and a pilot shaft (3) in a drainage gallery (2) around an underground plant hole (1), wherein the pilot tunnel and the pilot shaft (3) are communicated with a filling type hidden karst cave (4) around a rock wall crane beam part (101) of a target operation area of the underground plant hole (1), and the filling type hidden karst cave (4) empties a karst cave filler (401) in the underground plant hole and fills backfilled concrete (5) with the pilot tunnel and the pilot shaft (3);
the rock wall crane beam part (101) comprises a rock wall crane beam (10) and a rock wall crane beam wall attachment wall (9) arranged below the rock wall crane beam (10), wherein an anchoring supporting structure is arranged between the rock wall crane beam part (101) and surrounding rocks in the area of the filling type hidden karst cave (4), so that the filling type hidden karst cave (4) provides a stable supporting foundation for the rock wall crane beam part (101).
2. The filled hidden karst cave reinforcing structure of a rock wall crane beam part according to claim 1, wherein: gao Chengjun of the pilot tunnel and the pilot shaft (3) is higher than the top elevation of the filling type hidden karst cave (4).
3. The filled hidden karst cave reinforcing structure of a rock wall crane beam part according to claim 1, wherein: and the backfill concrete (5) is connected with the filled hidden karst cave (4) and the rock walls of the pilot tunnel and the pilot shaft (3) to form a dowel.
4. The filled hidden karst cave reinforcing structure of a rock wall crane beam part according to claim 1, wherein: the anchoring supporting structure comprises a common mortar anchor rod (6) and a consolidation grouting (7), wherein the common mortar anchor rod (6) and the consolidation grouting (7) are arranged between a wall-attached wall (9) of a rock wall crane beam and surrounding rocks in a region of a filled hidden karst cave (4), and the common mortar anchor rod (6) and the consolidation grouting (7) are arranged at intervals.
5. The filled type hidden karst cave reinforcing structure of a rock wall crane beam part according to claim 4, wherein: the consolidation grouting (7) is characterized in that a grouting hole is formed in the filling type hidden karst cave (4), and the depth of the grouting hole is larger than the boundary of the filling type hidden karst cave (4) far away from the side wall of the underground plant hole (1).
6. The filled hidden karst cave reinforcing structure of a rock wall crane beam part according to claim 1, wherein: and a rock wall crane beam tension anchor rod (8) is supported and arranged between the rock wall crane beam (10) and the backfill concrete (5) in the pilot tunnel and the guide well (3).
7. The filled hidden karst cave reinforcing structure of a rock wall crane beam part according to claim 1, wherein: at least one row of prestressed anchor cables (11) is arranged on the wall-attached wall (9) of the rock wall crane beam, and the anchoring supporting structure is arranged between the adjacent rows of prestressed anchor cables (11).
8. The filled hidden karst cave reinforcing structure of a rock wall crane beam part according to claim 1, wherein: and the wall attaching wall (9) of the rock wall crane beam relatively covers the height range of the filling type hidden karst cave (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321646023.0U CN220468928U (en) | 2023-06-26 | 2023-06-26 | Filling type hidden karst cave reinforcing structure of rock wall crane beam part |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321646023.0U CN220468928U (en) | 2023-06-26 | 2023-06-26 | Filling type hidden karst cave reinforcing structure of rock wall crane beam part |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220468928U true CN220468928U (en) | 2024-02-09 |
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ID=89798311
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321646023.0U Active CN220468928U (en) | 2023-06-26 | 2023-06-26 | Filling type hidden karst cave reinforcing structure of rock wall crane beam part |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220468928U (en) |
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2023
- 2023-06-26 CN CN202321646023.0U patent/CN220468928U/en active Active
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