CN205677638U - Anti bearing structure that subsides in loess tunnel - Google Patents
Anti bearing structure that subsides in loess tunnel Download PDFInfo
- Publication number
- CN205677638U CN205677638U CN201620640790.4U CN201620640790U CN205677638U CN 205677638 U CN205677638 U CN 205677638U CN 201620640790 U CN201620640790 U CN 201620640790U CN 205677638 U CN205677638 U CN 205677638U
- Authority
- CN
- China
- Prior art keywords
- positive hole
- bow member
- hole bow
- arch springing
- shaped steel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 31
- 239000010959 steel Substances 0.000 claims abstract description 31
- 238000004062 sedimentation Methods 0.000 abstract description 4
- 239000011435 rock Substances 0.000 abstract description 3
- 239000011378 shotcrete Substances 0.000 abstract description 3
- 238000009933 burial Methods 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 1
- 238000010276 construction Methods 0.000 description 9
- 238000009412 basement excavation Methods 0.000 description 3
- 239000004567 concrete Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000002787 reinforcement Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 230000003466 anti-cipated effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Lining And Supports For Tunnels (AREA)
Abstract
The utility model discloses an anti-sedimentation supporting structure of a loess tunnel, which is characterized in that longitudinal rods are connected among all main arch centering frames, and foot-locking anchor pipes are arranged at the connecting node positions of the longitudinal rods and the main arch centering frames and at the bottoms of the longitudinal rods; the outer sides of the arch springing at the two sides of the main arch are respectively provided with a profile steel supporting leg, and the profile steel supporting leg and the arch springing of the main arch form a herringbone support; and a supporting steel plate is arranged at the bottom of the profile steel supporting leg and the main arch. The utility modelThe novel middle-enlarged arch springing and the primary support sprayed concrete bear the surrounding rock pressure together to form a plurality of arch frames which bear the common stress, the stress of a 'rod system' is changed into the stress of a 'plate system', and the measure of pre-control is particularly suitable for IV-level self-weight collapsible Q3Sandy loess is associated with geological conditions of shallow burial, bias pressure, high water content and low bearing capacity.
Description
Technical field
The utility model relates in settlement by soaking Q3Control tunnel subsidence descending branch bearing structure under chiltern loess tunnel geological conditions,
The more specifically Q at IV grade of self-weight collapsible3Chiltern loess is simultaneously attended by shallow embedding, bias, high-moisture percentage and low bearing capacity
Geological conditions under sedimentation descending branch bearing structure.
Background technology
In engineering construction, the headroom in order to ensure tunnel meets design and requires, warp is pre-frequently with increase loess tunnel
Stay settling amount, even design anticipated settlement 2～3 times, which increase the security risk of Tunnel Landslide.Existing controlling party
Formula is " control afterwards ", is to occur that tunnel subsidence increases lock pin anchor tube after excessive, sets up false stull and erect support, even change
Digging construction method.This processing mode on the one hand processing procedure is time-consumingly long, on the other hand needs after processing is completed through one section
Stablizing of time can be only achieved effect, has had a strong impact on the construction speed in tunnel.
Utility model content
The utility model is for avoiding the weak point existing for above-mentioned prior art, providing a kind of loess tunnel anti-settling
Supporting structure, is one anti-settling measure in advance, is converted into " plate system " tunnel steelframe system by " leverage ", to improve steelframe knot
The bearing capacity of structure, non-deformability and security and stability.
The utility model adopts the following technical scheme that for solving technical problem
The utility model loess tunnel anti-settling supporting structure, including longitudinally spaced along tunnel arrange each positive hole bow member, its
It is structurally characterized in that in described supporting structure, longitudinally connected device is set, be to carry out even with longitudinal bar member between the bow member of each positive hole
Connect, in the link node position of described longitudinal bar member and positive hole bow member, the bottom that is positioned at longitudinal bar member be provided with lock pin anchor tube；
Arrange and expand arch springing, be that shaped steel supporting leg is set in the outside of the arch springing of described positive hole bow member, encircle with positive hole with described shaped steel supporting leg
The arch springing of frame forms " people " word and supports；In the bottom of described shaped steel supporting leg and positive hole bow member, a pading plate is set.
The feature of the utility model loess tunnel anti-settling supporting structure lies also in: in the both sides of described positive hole bow member, institute
Stating circumferentially spaced-apart along described positive hole bow member of longitudinal bar member, the interval, every side being positioned at described positive hole bow member arranges at least twice.
The feature of the utility model loess tunnel anti-settling supporting structure lies also in: described expansion arch springing Shaped Steel supporting leg with
The angle propping up between pading plate is 60 °.
The feature of the utility model loess tunnel anti-settling supporting structure lies also in: at described expansion arch springing Shaped Steel supporting leg
Be connected for full weld with between the bow member of positive hole, described pading plate be full weld between shaped steel supporting leg and positive hole bow member and be connected.
The feature of the utility model loess tunnel anti-settling supporting structure lies also in: described longitudinal bar member includes away from positive hole arch
First longitudinal bar member at 30cm bottom the arch springing of frame, and bottom the arch springing away from positive hole bow member, the second at 90cm is longitudinal
Rod member.
The feature of the utility model loess tunnel anti-settling supporting structure lies also in: described first longitudinal bar member and second
Road longitudinal bar member is to block I25a shaped steel by the spacing between adjacent positive hole bow member, and adjacent positive hole bow member it
Between carry out full weld connection.
The utility model expands arch springing and jointly bears pressure from surrounding rock with preliminary bracing gunite concrete, make in prior art
Single Pin bow member stress become the common stress of many Pin bow member, " leverage " stress is become " plate system " stress, uses simultaneously and " control in advance
The settlement measurement of system ".Compared with the prior art, the utility model has the beneficial effect that:
1st, there is not to carry out during sedimentation actively control in the utility model in tunnel, including by tunnel steelframe system by " leverage "
It is converted into " plate system ", improve the bearing capacity of steel frame construction, effectively control tunnel subsidence, be the mode of a kind of " Prior Control ",
Effectively prevent the reinforcement measure taking to remedy character after tunnel settles risk present in construction；
2nd, the utility model method effectively prevent during tunnel divides bench excavation, in, after excavation of getting out of a predicament or an embarrassing situation, make
Middle step bow member is unsettled, causes the sedimentation of middle step；
3rd, the utility model method causes tunnel tunnel face to stop work when effectively prevent existing first reinforcement measure construction
Risk.
4th, the utility model is for self-weight collapsible Q3Chiltern loess tunnel geological conditions, is particularly suited for IV grade of deadweight wet
Fall into the Q of property3Chiltern loess the geological conditions being attended by shallow embedding, bias, high-moisture percentage and low bearing capacity, specifically refer to tunnel and bury
Deep only at 12.6m～36m, moisture content is 23%-33.6%, and bearing capacity is the geological conditions of 55KPa～146KPa.
Brief description
Fig. 1 is the utility model structural representation；
Fig. 2 is expansion arch springing schematic diagram in the utility model；
Label in figure: 102 lock pin anchor tubes, 103 longitudinal bar member, 104 positive hole bow members, 105 pading plates, 106 shaped steel supporting legs.
Detailed description of the invention
See Fig. 1 and Fig. 2, in the present embodiment loess tunnel anti-settling supporting structure be along tunnel longitudinally spaced arrange each just
Hole bow member 104, in supporting structure, arranges longitudinally connected device, is to carry out with longitudinal bar member 103 between each positive hole bow member 104
Connect, in the link node position of longitudinal bar member 103 and positive hole bow member 104, the bottom that is positioned at longitudinal bar member 103 be provided with lock
Pin anchor tube 102；Arrange and expand arch springing, be shaped steel supporting leg 106 to be set in the outside of the arch springing of positive hole bow member 104, with shaped steel supporting leg
106 form " people " word with the arch springing of positive hole bow member 104 supports；In the bottom of shaped steel supporting leg 106 and positive hole bow member 104, pad is set
Steel plate 105.
In being embodied as, corresponding measure also includes: in the both sides of positive hole bow member 104, longitudinal bar member 103 is along positive hole bow member
104 circumferentially spaced-apart, be positioned at positive hole bow member 104 every side interval at least twice are set；Expand arch springing Shaped Steel supporting leg 106 with
The angle propping up between pading plate 105 is 60 °；Expanding between arch springing Shaped Steel supporting leg 106 and positive hole bow member 104 for full weld even
Connect, be full weld between a pading plate 105 with shaped steel supporting leg 106 and positive hole bow member 104 and be connected；Positive hole bow member 104 and longitudinal direction
Rod member 103 all uses I25a shaped steel, and pading plate 105 is the steel plate that a length of 100cm, width are 30cm.
Longitudinal bar member 103 includes the first longitudinal bar member bottom the arch springing away from positive hole bow member 104 at 30cm, and away from just
Second longitudinal bar member at 90cm bottom the arch springing of hole bow member 104；First longitudinal bar member and second longitudinal bar member be by
I25a shaped steel is blocked by the spacing between adjacent positive hole bow member 104, and carries out full between adjacent positive hole bow member 104
Weldering connects.
In the present embodiment, loess tunnel anti-settling supporting construction following steps are carried out:
Step 1: excavate according to three step seven footworks first against collapsible loess tunnel, forms the positive hole of loess tunnel
Section, then according to expand the physical dimension excavation both sides abutment wall of arch springing.
Step 2: be fixed peace in the section of positive hole by completing the prefabricated positive hole bow member with expansion arch springing outside the venue
Dress；Weld each road longitudinal bar member 103 subsequently between each positive hole bow member 104, form " plate system " structure, the length of longitudinal bar member 103
Degree is the spacing between adjacent positive hole bow member 104.
Step 3: be close to positive hole bow member 104 and be in the bottom anchor of longitudinal bar member 103 and respectively lock pin anchor tube 102, making lock
Pin anchor tube 102 plays, for positive hole bow member 104, the effect lifted, and uses " L " between lock pin anchor tube 102 and positive hole bow member 104
The reinforcement welding of type Φ 22.
Step 4: construction tunnel reinforced mesh and system anchor bolt form reinforced mesh and suspension roof support.
Step 5: spray C25 concrete in the following order: first spray and fill by the arch springing of positive hole bow member 104, shaped steel
The cavity that supporting leg 106 and a pading plate 105 are formed, then closes positive hole bow member, completes the supporting of loess tunnel anti-settling
Construction, utilizes expansion arch springing jointly to bear pressure from surrounding rock with preliminary bracing gunite concrete.
Claims (6)
1. a loess tunnel anti-settling supporting structure, described supporting structure includes longitudinally spaced along tunnel arranging each positive hole bow member
(104), it is characterized in that, in described supporting structure, arranging longitudinally connected device, be with longitudinal rod between each positive hole bow member (104)
Part (103) is attached, described longitudinal bar member (103) and positive hole bow member (104) link node position, be positioned at longitudinal rod
The bottom of part (103) is provided with lock pin anchor tube (102)；Arrange and expand arch springing, be outside the arch springing of described positive hole bow member (104)
Side arranges shaped steel supporting leg (106), forms " people " word with the arch springing of described shaped steel supporting leg (106) and positive hole bow member (104) and supports；?
Described shaped steel supporting leg (106) arranges a pading plate (105) with the bottom in positive hole bow member (104).
2. loess tunnel anti-settling supporting structure according to claim 1, is characterized in that: described positive hole bow member (104)
Both sides, described longitudinal bar member (103) is circumferentially spaced-apart along described positive hole bow member (104), is positioned at described positive hole bow member (104)
Interval, every side arranges at least twice.
3. loess tunnel anti-settling supporting structure according to claim 1, is characterized in that: described expansion arch springing Shaped Steel props up
Angle between leg (106) and a pading plate (105) is 60 °.
4. loess tunnel anti-settling supporting structure according to claim 1, is characterized in that: at described expansion arch springing Shaped Steel
It is connected for full weld between supporting leg (106) with positive hole bow member (104), described pading plate (105) and shaped steel supporting leg (106) and just
It is full weld between hole bow member (104) to connect.
5. loess tunnel anti-settling supporting structure according to claim 1, is characterized in that: described longitudinal bar member (103) wraps
Include bottom the arch springing away from positive hole bow member (104) at the bottom of the first longitudinal bar member at 30cm, and the arch springing away from positive hole bow member (104)
Second longitudinal bar member at portion 90cm.
6. loess tunnel anti-settling supporting structure according to claim 5, is characterized in that: described first longitudinal bar member and
Second longitudinal bar member is to block I25a shaped steel by the spacing between adjacent positive hole bow member (104), and adjacent
Carry out full weld connection between positive hole bow member (104).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620640790.4U CN205677638U (en) | 2016-06-23 | 2016-06-23 | Anti bearing structure that subsides in loess tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620640790.4U CN205677638U (en) | 2016-06-23 | 2016-06-23 | Anti bearing structure that subsides in loess tunnel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205677638U true CN205677638U (en) | 2016-11-09 |
Family
ID=57429452
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620640790.4U Expired - Fee Related CN205677638U (en) | 2016-06-23 | 2016-06-23 | Anti bearing structure that subsides in loess tunnel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205677638U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105888699A (en) * | 2016-06-23 | 2016-08-24 | 中铁四局集团有限公司 | Anti-settlement supporting structure of loess tunnel and construction method thereof |
| CN107013235A (en) * | 2017-05-23 | 2017-08-04 | 梁美欣 | loess tunnel pipe shed support structure |
| CN110185477A (en) * | 2019-04-23 | 2019-08-30 | 广东省交通规划设计研究院股份有限公司 | Tunnel support structure and tunnel support construction method |
-
2016
- 2016-06-23 CN CN201620640790.4U patent/CN205677638U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105888699A (en) * | 2016-06-23 | 2016-08-24 | 中铁四局集团有限公司 | Anti-settlement supporting structure of loess tunnel and construction method thereof |
| CN107013235A (en) * | 2017-05-23 | 2017-08-04 | 梁美欣 | loess tunnel pipe shed support structure |
| CN110185477A (en) * | 2019-04-23 | 2019-08-30 | 广东省交通规划设计研究院股份有限公司 | Tunnel support structure and tunnel support construction method |
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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: 20161109 Termination date: 20210623 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |