CN205117354U - Reinforcing bar grid crowd with encircle foot strengthens device temporarily - Google Patents
Reinforcing bar grid crowd with encircle foot strengthens device temporarily Download PDFInfo
- Publication number
- CN205117354U CN205117354U CN201520739591.4U CN201520739591U CN205117354U CN 205117354 U CN205117354 U CN 205117354U CN 201520739591 U CN201520739591 U CN 201520739591U CN 205117354 U CN205117354 U CN 205117354U
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- reinforcing bar
- bar grid
- grid
- interim
- upper portion
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Abstract
The utility model belongs to the technical field of fu shui, weak surrounding rock tunnel's initial stage supporting construction construction, for the initial stage supporting construction among can be under construction quick, economic, completely rich water, the weak surrounding rock tunnel, the utility model provides a reinforcing bar grid crowd with encircle foot strengthens device temporarily, include a plurality of pin reinforcing bar grids of being connected by the longitudinal tie muscle, every pin reinforcing bar grid includes upper portion reinforcing bar grid and the inverted arch reinforcing bar grid of connecting through the backing plate, and the hunch foot of upper portion reinforcing bar grid is equipped with a plurality of lock foot stocks, and the vault of upper portion reinforcing bar grid and side wall department are equipped with a plurality of mortar stocks, the upper portion reinforcing bar grid backing plate bottom of excavation department is provided with interim enhancement device. The utility model discloses a reinforcing bar grid crowd is linked to each other by the splice bar along tunnel axial direction, has improved whole bearing capacity, before the inverted arch excavation, set up interim enhancement device in the backing plate bottom of upper portion reinforcing bar grid, and the upper portion reinforcing bar grid reversal phenomenon that has avoided not uniform settlement to cause has improved supporting intensity.
Description
Technical field
The utility model belongs to the preliminary bracing structure construction technology field of Fu Shui, Support System in Soft Rock Tunnels, is specifically related to a kind of reinforcing bar grid group with the interim stiffening device of arch springing.
Background technology
In existing tunnel construction technology, in the face of rich water, weak surrounding rock condition, need consider that inverted arch design, reduce the phenomenons such as the base plate that surrouding rock stress distribution again causes is heaved, arch springing destruction, raising tunnel integrated carrying ability.Support options aspect in the early stage, the preliminary bracing of main employing shaped steel arch, but its weight is large, and not easily machine-shaping, cost is high, and installation is wasted time and energy, and affects the duration.According to reinforcing bar grid, although light, be easy to fabrication and installation, but there is the defect of poor safety performance, particularly top many Pin reinforcing bar grid install and bottom inverted arch does not excavate time, because Geological Reasons causes inverted arch to excavate the differential settlement on boundary stratum, make top bow member axially the changing of the relative positions occur along tunnel, overall force structure can not be formed in the axial direction, bring potential safety hazard.
Summary of the invention
The utility model, in order to the preliminary bracing construction that can quick, economic, fully construct in rich water, Support System in Soft Rock Tunnels, provides a kind of reinforcing bar grid group with the interim stiffening device of arch springing.
The utility model adopts following technical scheme:
A kind of reinforcing bar grid group with the interim stiffening device of arch springing, comprise the some Pin reinforcing bar grids connected by longitudinal dowel, every Pin reinforcing bar grid comprises the upper reinforcement grid and inverted arch reinforcing bar grid that are connected by backing plate, the arch springing of upper reinforcement grid is provided with some lock foot anchoring stocks, vault and the side wall place of upper reinforcement grid are provided with some grouting rock bolts, are provided with interim stiffening device bottom the upper reinforcement grid backing plate at described excavation place.
Described upper reinforcement grid and inverted arch reinforcing bar grid comprise main muscle and stirrup, are provided with bearing rod between main muscle and stirrup.
Described backing plate comprises the top angle steel and bottom angle steel that are fastened by bolts, and top angle steel and bottom angle steel are connected on the main muscle of the main muscle of upper reinforcement grid, inverted arch reinforcing bar grid, and interim stiffening device is arranged at immediately below the angle steel of top.
Described interim stiffening device is riveted by some pieces of planks and is formed, and riveting location is between two Pin reinforcing bar grids.
The width 10cm larger than the width of top angle steel of described piece of plank.
The utility model has following beneficial effect:
1, the utility model adopts reinforcing bar grid group, has some anchor rod anchored at vault, arch springing and side wall, is connected simultaneously, improves integrated carrying ability along tunnel axial direction by dowel, and stress is good, is beneficial to on-the-spot tunnel normal construction;
2, before inverted arch excavation, interim stiffening device is provided with bottom the backing plate of upper reinforcement grid, after inverted arch is excavated, interim stiffening device falls automatically, be threaded with inverted arch reinforcing bar grid by arch springing backing plate, close into ring as early as possible, avoid the upper reinforcement grid inconsistent phenomenon that differential settlement causes, improve supporting intensity;
3, interim stiffening device is formed by plank anchoring, and material is simple, be easy to operation, and detachably reuses, and saves material, reaches economical and practical object.
Accompanying drawing explanation
Fig. 1 is the structural representation of every Pin reinforcing bar grid;
Fig. 2 is A place partial enlarged drawing in Fig. 1;
Fig. 3 is the lateral view of Fig. 2;
Fig. 4 is the top view of Fig. 2;
Structural representation before Fig. 5 inverted arch excavation;
Fig. 6 is the top view of Fig. 5;
Fig. 7 is the structural representation of interim stiffening device;
In figure: 1-grouting rock bolt, 2-upper reinforcement grid, 3-lock foot anchoring stock, 4-inverted arch reinforcing bar grid, 5-bearing rod, the main muscle of 6-, 7-stirrup, 8-top angle steel, 9-bottom angle steel, the interim stiffening device of 10-, 11-plank, 12-rivet.
Detailed description of the invention
By reference to the accompanying drawings, detailed description of the invention of the present utility model is described further:
A kind of reinforcing bar grid group with the interim stiffening device of arch springing, comprise the some Pin reinforcing bar grids (Fig. 1) connected by longitudinal dowel, every Pin reinforcing bar grid comprises the upper reinforcement grid 2 and inverted arch reinforcing bar grid 4 that are connected by backing plate, described upper reinforcement grid 2 and inverted arch reinforcing bar grid 4 are as Fig. 2, 3, shown in 4, comprise main muscle 6 and stirrup 7, bearing rod 5 is provided with between main muscle 6 and stirrup 7, upper reinforcement grid 2 and inverted arch reinforcing bar grid 4 are all made up of multistage, every section is connected by backing plate bolt, backing plate is welded on grid both sides by angle steel to be formed, top angle steel 8 and bottom angle steel 9 are connected to the main muscle 6 of upper reinforcement grid 2, on the main muscle 6 of inverted arch reinforcing bar grid 4.The arch springing of upper reinforcement grid 2 is provided with some lock foot anchoring stocks 3, and the vault of upper reinforcement grid 2 and side wall place are provided with some grouting rock bolts 1 and squeeze in rock stratum.Before erection inverted arch reinforcing bar grid, the reinforcing bar grid inconsistent phenomenon caused to prevent geological conditions, upper reinforcement grid 2 backing plate (top angle steel) bottom at excavation place is provided with interim stiffening device.
Described interim stiffening device is riveted by the block plank 11 that some 5cm are thick and is formed, and riveting location is between two Pin reinforcing bar grids, and guarantee construction period upper reinforcement grid is stressed at tunnel axial integral.In order to ensure support effect, the width 10cm larger than the width of top angle steel 8 of plank 11, makes top angle steel can be placed in plank 11 upper surface completely, as shown in Figure 6.
Concrete implementation step is as follows:
1, according to actual geological condition and tunnel cross-section design, binding isotherm calculates, and determines all kinds of rebar sizes and model;
2, excavate spacing distance according to top, tunnel excavation with inverted arch, determine reinforcing bar grid group Pin number, and then determine plank length, plank width is greater than backing plate width 10cm;
3, make reinforcing bar grid mould, clod wash processing is carried out at scene;
4, utilize the little coordinate of total powerstation to carry out reinforcing bar grid examination to spell, meet assembled requirement;
5, excavate top, tunnel, erection upper reinforcement grid, side wall, vault set grouting rock bolt, arch springing sets lock foot anchoring stock, is weldingly connected between every Pin by dowel, and installs interim stiffening device at arch springing place, the superimposed place of plank passes through rivet anchoring, as shown in Fig. 5,6,7;
6, excavate inverted arch, interim stiffening device falls automatically, every Pin grid place, removes plank, utilizes top angle steel and bottom angle steel by upper reinforcement grid and inverted arch reinforcing bar grid reinforcement by connection, then advance successively.
Claims (5)
1. one kind has the reinforcing bar grid group of the interim stiffening device of arch springing, it is characterized in that: comprise the some Pin reinforcing bar grids connected by longitudinal dowel, every Pin reinforcing bar grid comprises the upper reinforcement grid (2) and inverted arch reinforcing bar grid (4) that are connected by backing plate, the arch springing of upper reinforcement grid (2) is provided with some lock foot anchoring stocks (3), the vault of upper reinforcement grid (2) and side wall place are provided with some grouting rock bolts (1), are provided with interim stiffener bottom the backing plate of described upper reinforcement grid (2).
2. the reinforcing bar grid group with the interim stiffening device of arch springing according to claim 1, it is characterized in that: described upper reinforcement grid (2) and inverted arch reinforcing bar grid (4) comprise main muscle (6) and stirrup (7), are provided with bearing rod (5) between main muscle (6) and stirrup (7).
3. the reinforcing bar grid group with the interim stiffening device of arch springing according to claim 2, it is characterized in that: described backing plate comprises the top angle steel (8) and bottom angle steel (9) that are fastened by bolts, top angle steel (8) and bottom angle steel (9) are connected on the main muscle (6) of the main muscle (6) of upper reinforcement grid (2), inverted arch reinforcing bar grid (4), and interim stiffener is arranged at immediately below top angle steel (8).
4. the reinforcing bar grid group with the interim stiffening device of arch springing according to claim 3, is characterized in that: described interim stiffener is riveted by some pieces of planks (11) and formed, and riveting location is between two Pin reinforcing bar grids.
5. the reinforcing bar grid group with the interim stiffening device of arch springing according to claim 4, is characterized in that: the width 10cm larger than the width of top angle steel (8) of described piece of plank (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520739591.4U CN205117354U (en) | 2015-09-23 | 2015-09-23 | Reinforcing bar grid crowd with encircle foot strengthens device temporarily |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520739591.4U CN205117354U (en) | 2015-09-23 | 2015-09-23 | Reinforcing bar grid crowd with encircle foot strengthens device temporarily |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205117354U true CN205117354U (en) | 2016-03-30 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520739591.4U Expired - Fee Related CN205117354U (en) | 2015-09-23 | 2015-09-23 | Reinforcing bar grid crowd with encircle foot strengthens device temporarily |
Country Status (1)
| Country | Link |
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| CN (1) | CN205117354U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105781593A (en) * | 2016-05-13 | 2016-07-20 | 中铁四局集团第三建设有限公司 | Steel grating assisted diversion tunnel preliminary bracing structure and method |
| CN108798720A (en) * | 2018-03-30 | 2018-11-13 | 中国建筑股份有限公司 | For underground engineering ledge method anchor grid one arch springing reinforcement system and its construction method |
| CN111236984A (en) * | 2020-02-28 | 2020-06-05 | 中铁第一勘察设计院集团有限公司 | Pin locking system based on effective control of vertical displacement of primary support steel frame and construction method thereof |
-
2015
- 2015-09-23 CN CN201520739591.4U patent/CN205117354U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105781593A (en) * | 2016-05-13 | 2016-07-20 | 中铁四局集团第三建设有限公司 | Steel grating assisted diversion tunnel preliminary bracing structure and method |
| CN108798720A (en) * | 2018-03-30 | 2018-11-13 | 中国建筑股份有限公司 | For underground engineering ledge method anchor grid one arch springing reinforcement system and its construction method |
| CN108798720B (en) * | 2018-03-30 | 2023-08-01 | 中国建筑股份有限公司 | Anchor grid integrated arch foot reinforcement system for underground engineering arch cover method and construction method thereof |
| CN111236984A (en) * | 2020-02-28 | 2020-06-05 | 中铁第一勘察设计院集团有限公司 | Pin locking system based on effective control of vertical displacement of primary support steel frame and construction method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160330 Termination date: 20210923 |
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| CF01 | Termination of patent right due to non-payment of annual fee |