CN216974878U - Landslide accumulation body tunnel top-picking composite reinforcing ring - Google Patents
Landslide accumulation body tunnel top-picking composite reinforcing ring Download PDFInfo
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- CN216974878U CN216974878U CN202220213520.0U CN202220213520U CN216974878U CN 216974878 U CN216974878 U CN 216974878U CN 202220213520 U CN202220213520 U CN 202220213520U CN 216974878 U CN216974878 U CN 216974878U
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- 230000003014 reinforcing effect Effects 0.000 title claims abstract description 60
- 239000002131 composite material Substances 0.000 title claims abstract description 30
- 238000009825 accumulation Methods 0.000 title claims abstract description 22
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 18
- 239000010959 steel Substances 0.000 claims abstract description 18
- 230000002787 reinforcement Effects 0.000 claims description 4
- 238000010276 construction Methods 0.000 abstract description 13
- 239000011435 rock Substances 0.000 abstract description 9
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 238000009412 basement excavation Methods 0.000 description 11
- 238000000034 method Methods 0.000 description 6
- 238000004364 calculation method Methods 0.000 description 2
- 239000004567 concrete Substances 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 238000009435 building construction Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000011378 shotcrete Substances 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
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Abstract
The utility model discloses a landslide accumulation body tunnel top-lifting composite reinforcing ring; the main structure of the composite reinforcing ring is door-shaped outer support and arch-shaped inner support, 4 trusses are arranged totally, and connecting pad beams are arranged above the reinforcing ring to form integral stress. The door-shaped outer support is made of I18I-shaped steel, 2 phi 42 grouting lock foot anchor pipes are arranged, the length of each anchor pipe is 4.5m, and the reinforcing ring is provided with an inner inclined support. The arch-shaped inner support is made of I18I-steel and is provided with 2 foot locking anchor rods, the arch top of the inner support is abutted against the door-shaped frame, and the inverted arch frame is arranged at the bottom of the inner support and is closed into a ring, so that the structural stability is enhanced. This patent has following advantage and beneficial effect: (1) the structure is stressed clearly, the supporting strength is high, and the personnel safety can be ensured; (2) the reinforcing ring is suitable for surrounding rock conditions of all levels, can be used for unfavorable geological conditions, and has wide applicability; (3) the reinforcing ring can be used as a permanent structure, so that the construction quality of the tunnel intersection is ensured.
Description
Technical Field
The utility model relates to the technical field related to building construction, in particular to a landslide accumulation body tunnel top-lifting composite reinforcing ring.
Background
With the rapid development of the industry of the long and large tunnel in China, the tunnel construction becomes a normal state; some related technologies have also emerged; for example, the utility model application of application No. 202110740820.4 discloses a construction method for three-step top-picking at a rapid tunnel intersection through retrieval discovery, which comprises the following steps: embedding a distance between the cross position of the cross hole and the main hole to establish a three-dimensional numerical calculation model for simulation calculation, and determining the main deformation concentration position and the stress concentration position of the surrounding rock after the cross hole is transferred to the main hole excavation support; performing lithology identification on surrounding rocks in a range close to the top-picking range at the crossing position of the transverse tunnel and the main tunnel, and excavating the transverse tunnel; excavating an arch reinforcing ring section after the installation and support of the transverse arch are finished, and taking the arch reinforcing ring section as a primary support section of the main tunnel; installing an arch-shaped reinforcing ring to enable the arch-shaped reinforcing ring to penetrate into the primary support section of the main tunnel; excavating a main tunnel upper step shed tunnel; and (5) after the excavation of the upper step shed tunnel of the main tunnel is finished, installing and supporting an upper step arch frame of the main tunnel.
Application number 201910445091.2's utility model discloses a door style of calligraphy frame construction method of choosing one's head, relates to tunnel construction technical field, and its technical scheme main points are: the method comprises the following steps: 1) construction preparation; processing a door-shaped steel frame; 2) excavating and supporting at a construction channel S5 section; 3) excavating and supporting a top-picking section of a construction channel S5; 4) excavating the station section in a segmented manner, and erecting a portal steel frame; 5) constructing an arch steel frame and sprayed concrete on the upper half section of the station; constructing a special-shaped grid arch center of the overhanging cross section and spraying concrete; 6) constructing a pilot tunnel and a main station tunnel support; dismantling a door-shaped steel frame at the left part in the large mileage direction; 7) dismantling the right part of the door-shaped steel frame at the large mileage end; 8) constructing an arch-shaped steel frame of a guide pit on a station, and spraying concrete; 9) excavating a right upper pilot tunnel and a left upper pilot tunnel of a support in sequence; 10) and excavating a main tunnel of the station.
However, the tunnel top-lifting reinforcing ring mainly adopts the following structure:
1. no reinforcing ring is arranged: in the traditional intersection construction, for avoiding the stress concentration condition of the intersection, the intersection position is adjusted to a better section of surrounding rocks, and an anchor rod is arranged by means of surrounding rock self-stability for supporting.
2. Arch-shaped reinforcing ring: the arch-shaped reinforcing ring is arc-shaped, cannot provide a stable supporting point for the main tunnel arch center, and is difficult to install on site; meanwhile, the arch-shaped reinforcing ring is suitable for bearing the surrounding stress, but the main hole is applied to a large amount of vertical loads of the arch-shaped reinforcing ring, so that the arch-shaped reinforcing ring is easy to deform, distort and even shear and damage, the strength of the supporting structure is insufficient, and the construction safety risk is high.
SUMMERY OF THE UTILITY MODEL
Therefore, in order to solve the above-mentioned disadvantages, the present invention provides a composite reinforcement ring for a landslide accumulation body tunnel top-lifting; the problem that deformation and sedimentation are easy to occur after primary support of a tunnel intersection of a landslide accumulation body is mainly solved, surrounding rocks of the landslide accumulation body are loose and poor in self-stability, stress at the intersection is concentrated and cannot be closed as a channel secondary lining for a long time, the traditional support structure is not clear in stress, insufficient in structural strength, and sedimentation and deformation are easy to occur after stress of the surrounding rocks is increased after the primary support; this patent proposes a composite type beaded finish that pops one's head, can improve the structural stability at crossing, reduces excavation operation personnel safety risk, and the atress is clear and definite, the operation is swift, safe and reliable.
The utility model is realized in this way, construct a kind of landslide accumulation body tunnel and choose the compound stiffening ring of top, characterized by that; the main structure is a door-shaped outer support and an arch-shaped inner support, 4 trusses are arranged, and a connecting pad beam is arranged above a reinforcing ring to form integral stress; the arch-shaped inner support arch is abutted against the door-shaped frame, and the inverted arch frame is arranged at the bottom to form a closed ring, so that the structural stability is enhanced.
The utility model relates to a landslide accumulation body tunnel top-lifting composite reinforcing ring which is characterized in that a top-lifting composite reinforcing ring is arranged on a tunnel top; the door-shaped outer support is made of I18I-steel, 2 phi 42 grouting lock foot anchor pipes are arranged, the length of each anchor pipe is 4.5m, and the reinforcing ring is provided with an inner inclined support.
The utility model relates to a landslide accumulation body tunnel top-lifting composite reinforcing ring which is characterized in that a top-lifting composite reinforcing ring is arranged on a tunnel top; the arch-shaped inner support is made of I18I-steel and is provided with 2 locking anchor rods.
The utility model relates to a landslide accumulation body tunnel top-lifting composite reinforcing ring which is characterized in that a top-lifting composite reinforcing ring is arranged on a tunnel top; the connecting pad beam adopts a double-spliced I20, and the arch foot of each main hole arch above the reinforcing ring is arranged, so that 4 reinforcing rings are connected into a whole to bear force.
The utility model relates to a landslide accumulation body tunnel top-lifting composite reinforcing ring which is characterized in that a top-lifting composite reinforcing ring is arranged on a tunnel top; the implementation process is as follows; when a tunnel supporting hole is excavated to the position of a cross opening, a three-step method is adopted for excavation, door-shaped outer supports are laid out, door-shaped outer supports are installed on an upper step for excavation and inclined supports are additionally arranged, arch-shaped inner supports are installed on the steps in the excavation, the inner supports and the outer supports are installed according to an upper unit and a lower unit, an upper step unit is firstly installed and stably sprayed, the left part and the right part of the lower step unit are installed and separately sprayed, the inverted arch frame is finally excavated and closed to form a ring, and a small reinforcing ring is adopted to excavate a main hole to the position of an arch crown after the main hole is closed.
The utility model has the following advantages: the utility model provides a landslide accumulation body tunnel top-lifting composite reinforcing ring; the main structure of the composite reinforcing ring is a door-shaped outer support and an arch-shaped inner support, 4 trusses are arranged, and a connecting pad beam is arranged above the reinforcing ring to form integral stress. The door-shaped outer support is made of I18I-steel, 2 phi 42 grouting lock foot anchor pipes are arranged, the length of each anchor pipe is 4.5m, and the reinforcing ring is provided with an inner inclined support. The arch-shaped inner support is made of I18I-steel and is provided with 2 locking anchor rods, the arch top of the inner support is abutted against the door-shaped frame, and the bottom of the inner support is provided with an inverted arch frame which is closed into a ring, so that the structural stability is enhanced. The connecting pad beam adopts a double-spliced I20, and the arch foot of each main hole arch above the reinforcing ring is arranged, so that 4 reinforcing rings are connected into a whole to bear force. When a tunnel supporting hole is excavated to the position of a cross opening, a three-step method is adopted for excavation, door-shaped outer supports are laid out, door-shaped outer supports are installed on an upper step for excavation and inclined supports are additionally arranged, arch-shaped inner supports are installed on the steps in the excavation, the inner supports and the outer supports are installed according to an upper unit and a lower unit, an upper step unit is firstly installed and stably sprayed, the left part and the right part of the lower step unit are installed and separately sprayed, the inverted arch frame is finally excavated and closed to form a ring, and a small reinforcing ring is adopted to excavate a main hole to the position of an arch crown after the main hole is closed. This patent has following advantage and beneficial effect: (1) the structure is definite in stress and high in supporting strength, and can ensure the safety of personnel; (2) the reinforcing ring can be suitable for surrounding rock conditions of all levels, is slightly influenced by geological conditions and has wide applicability; (3) the reinforcing ring can be used as a permanent structure to ensure the construction quality of the tunnel intersection.
Drawings
FIG. 1 is a cross-sectional view of an intersection construction;
FIG. 2 is a schematic view of an embodiment of a composite portal for an intersection strengthening ring.
Wherein: the main tunnel comprises a door-shaped outer support 1, an arch-shaped inner support 2, a connecting pad beam 3, a grouting foot-locking anchor pipe 4, an inner inclined support 5, a supporting hole terminal point 6, a composite portal pad beam 7, a horizontal hole primary support 8, a 4-pin composite portal 9, a main tunnel steel frame contour line 10 of a top-raising section, a main tunnel original design steel frame contour line 11, a main tunnel arch 12 and an inner support closing 13.
Detailed Description
The present invention will be described in detail with reference to fig. 1-2, and the technical solutions in the embodiments of the present invention will be clearly and completely described, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The utility model provides a landslide accumulation body tunnel top-lifting composite reinforcing ring through improvement, which can be implemented as follows as shown in the figure; the main structure is a door-shaped outer support 1 and an arch-shaped inner support 2 which are provided with 4 trusses in total, and a connecting pad beam 3 is arranged above a reinforcing ring to form integral stress; the arch-shaped inner support 2 is abutted against the door-shaped frame, and the inverted arch frame is arranged at the bottom to form a closed ring, so that the structural stability is enhanced.
When the landslide accumulation body tunnel top-lifting composite reinforcing ring is implemented; the door-shaped outer support 1 is made of I18I-steel, 2 phi 42 grouting lock foot anchor pipes 4 with the length of 4.5m are arranged, and the reinforcing ring is provided with an inner inclined support 5.
When the landslide accumulation body tunnel top-lifting composite reinforcing ring is implemented; the arch-shaped inner support 2 adopts I18I-steel and is provided with 2 locking anchor rods.
When the landslide accumulation body tunnel top-lifting composite reinforcing ring is implemented; the connecting pad beam 3 adopts a double-spliced I20, and is arranged at the arch foot of each main hole above the reinforcing ring, so that 4 reinforcing rings are connected into a whole to bear force.
The corresponding implementation process of the landslide accumulation body tunnel top-lifting composite reinforcing ring is as follows; when a tunnel branch tunnel is excavated to a cross opening position, a three-step method is adopted for excavation, door-shaped outer supports are laid out, an upper step is excavated, the door-shaped outer supports 1 are installed, inclined supports 5 are additionally arranged, an arch-shaped inner support 2 is arranged in the step during excavation, the inner and outer supports are installed according to an upper unit and a lower unit, the upper step unit is firstly constructed and is stably sprayed, the left and right frames of the lower step unit are separately installed and are sprayed, finally, an inverted arch frame is excavated to form a closed ring, and a small reinforcing ring is adopted to excavate a main tunnel to the arch crown position after the closed ring is excavated.
This patent has following advantage and beneficial effect: (1) the structure is clear in stress and high in supporting strength, and can ensure the safety of personnel; (2) the reinforcing ring can be suitable for surrounding rock conditions of all levels, is slightly influenced by geological conditions and has wide applicability; (3) the reinforcing ring can be used as a permanent structure to ensure the construction quality of the tunnel intersection.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (4)
1. A landslide accumulation body tunnel top-lifting composite reinforcing ring is characterized in that a top-lifting composite reinforcing ring is arranged on a tunnel top; the main structure is door-shaped outer support (1) and arch-shaped inner support (2), 4 trusses are arranged, and connecting pad beams (3) are arranged above the reinforcing rings to form integral stress; the arch top of the arch-shaped inner support (2) is abutted against the door-shaped frame, and the bottom of the arch-shaped inner support is provided with an inverted arch frame which is closed into a ring, so that the structural stability is enhanced.
2. The landslide accumulation tunnel top-lifting composite reinforcement ring as claimed in claim 1, wherein; the door-shaped outer support (1) is made of I18I-steel, 2 phi 42 grouting lock leg anchor pipes (4) are arranged, the length of each pipe is 4.5m, and the reinforcing ring is provided with an inner inclined support (5).
3. The landslide accumulation tunnel top-lifting composite reinforcement ring as claimed in claim 1, wherein; the arch-shaped inner support (2) adopts I18I-steel and is provided with 2 locking anchor rods.
4. The landslide accumulation tunnel top-lifting composite reinforcement ring as claimed in claim 1, wherein; the connecting pad beam (3) adopts a double-assembly I20, and is arranged at the arch springing position of each main hole above the reinforcing ring, so that 4 reinforcing rings are connected into a whole to bear force.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220213520.0U CN216974878U (en) | 2022-01-26 | 2022-01-26 | Landslide accumulation body tunnel top-picking composite reinforcing ring |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220213520.0U CN216974878U (en) | 2022-01-26 | 2022-01-26 | Landslide accumulation body tunnel top-picking composite reinforcing ring |
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| CN216974878U true CN216974878U (en) | 2022-07-15 |
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| CN202220213520.0U Active CN216974878U (en) | 2022-01-26 | 2022-01-26 | Landslide accumulation body tunnel top-picking composite reinforcing ring |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117967323A (en) * | 2024-03-21 | 2024-05-03 | 中铁四局集团有限公司 | Reinforcing ring structure at hydraulic tunnel fork-to-branch hole interface and roof-picking construction method |
| CN119412079A (en) * | 2025-01-06 | 2025-02-11 | 中交第一航务工程局有限公司 | A method for oblique top selection of tunnels with uniform cross-section |
-
2022
- 2022-01-26 CN CN202220213520.0U patent/CN216974878U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117967323A (en) * | 2024-03-21 | 2024-05-03 | 中铁四局集团有限公司 | Reinforcing ring structure at hydraulic tunnel fork-to-branch hole interface and roof-picking construction method |
| CN119412079A (en) * | 2025-01-06 | 2025-02-11 | 中交第一航务工程局有限公司 | A method for oblique top selection of tunnels with uniform cross-section |
| CN119412079B (en) * | 2025-01-06 | 2025-05-16 | 中交第一航务工程局有限公司 | A method for oblique top selection of tunnels with uniform cross-section |
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