CN206830200U - A kind of unfavourable geological tunnel steel arch-shelf arch springing of falling V shape structure - Google Patents
A kind of unfavourable geological tunnel steel arch-shelf arch springing of falling V shape structure Download PDFInfo
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- CN206830200U CN206830200U CN201720553115.2U CN201720553115U CN206830200U CN 206830200 U CN206830200 U CN 206830200U CN 201720553115 U CN201720553115 U CN 201720553115U CN 206830200 U CN206830200 U CN 206830200U
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- arch
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- springing
- shelf
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Abstract
A kind of unfavourable geological tunnel steel arch-shelf arch springing of falling V shape structure, belong to the preliminary bracing bow member in construction facility, the especially construction of geology tunnel benching tunnelling method.It includes linear pattern arch section and arc-shaped joint, and arc-shaped joint is weldingly fixed in linear pattern arch section.Arch springing is welded and fixed in linear pattern arch section lower end and expands billet, encircles section upper end in linear pattern and fixed bow member junction steel plate is respectively welded in arc-shaped joint lower end.The utility model has an advantageous effect in that：Linear pattern encircles the setting of section, so that the arch springing of linear pattern arch section lower end expands billet and stopped on first pneumatically placed concrete face, encircle section by linear pattern arch load is delivered in the country rock body of tunnel both sides, arch steel arch-shelf itself is formed arching, play the arching of steel arch-shelf to greatest extent.Reach and change arch springing stress, ensure the stable purpose of vault, arch springing, the problem of efficiently solving vault, arch springing sedimentation.
Description
Technical field
A kind of unfavourable geological tunnel steel arch-shelf arch springing of falling V shape structure, belong to construction facility, especially geology tunnel platform
Preliminary bracing bow member in the construction of rank method.
Background technology
For in unfavourable geological tunnel benching tunnelling method work progress, when carrying out top bar steel arch-shelf installation, due to arch
Pin only by lock foot anchoring stock fixing force transfer, fails that effectively arch load is delivered in the country rock body of both sides in itself by steel arch-shelf,
So get out of a predicament or an embarrassing situation excavate when, it is hanging to easily cause arch springing, and lock foot anchoring stock intensity is not enough to support arch load, cause vault,
The consequence that arch springing sinks.To find out its cause, before steel arch-shelf cyclization, steel arch-shelf mainly plays power transmission, it is impossible to effectively plays
The effect of support, when serious, vault will be caused to cave in, led to a disaster.
The content of the invention
Problem to be solved in the utility model aiming at more than deficiency and provide that one kind can effectively solve vault, arch springing sinks
The supporting of drop problem bow member arch springing structure.Its technical scheme is as follows：
It includes linear pattern arch section and arc-shaped joint, and arc-shaped joint is weldingly fixed in linear pattern arch section.
Arch springing is welded and fixed in linear pattern arch section lower end and expands billet, encircles section upper end and arc-shaped joint in linear pattern
Fixed bow member junction steel plate is respectively welded in lower end.
The arc-shaped joint encircles tangent at the starting the arc of section with linear pattern.
Expand in the arch springing of linear pattern arch section lower end and apply lock foot anchoring stock at billet.
Compared with prior art, the utility model has an advantageous effect in that：
1st, the setting of linear pattern arch section so that the arch springing of linear pattern arch section lower end expands billet and stopped in just spray coagulation
On native face, section is encircleed by linear pattern arch load is delivered in the country rock body of tunnel both sides, arch steel arch-shelf itself is formed arch
Effect, the arching of steel arch-shelf is played to greatest extent.Expand billet and in linear pattern by encircleing the welding of section termination in linear pattern
The combining structure form that the starting the arc position of arch section is welded and fixed arc-shaped joint reaches change arch springing stress, ensures that vault, arch springing are steady
Fixed purpose, efficiently solve vault, arch springing sedimentation the problem of.
2nd, it is welded and fixed arch springing in linear pattern arch section lower end and expands billet, increases arch springing lifting surface area, reduce arch
Foot press is strong, further reduces the probability of arch springing sedimentation.
3rd, open up lock foot anchoring stock on arch springing expansion billet and apply hole, ensure that lock foot anchoring stock is arranged on and expand perpendicular to arch springing
The direction of big billet, changes lock foot anchoring stock stress form, can effectively avoid traditional lock foot anchoring stock from being led due to construction angular deviation
Cause bending moment excessive, cause lock pin failure.
4th, arc-shaped joint is welded and fixed in the starting the arc position of linear pattern arch section, this section of steel arch-shelf is tangent in top segmental arc, protects
Steel arch-shelf connection needs of getting out of a predicament or an embarrassing situation are demonstrate,proved, ensures that surface structure form is consistent with conventional bow member, also ensures bottom bow member good connection；
After bow member installation, gunite concrete filling is carried out to arch springing part, beam-shaped structure can be formed in tunnel longitudinal direction arch springing position,
Strengthen the stability of arch springing.
Brief description of the drawings：
Fig. 1, it is the utility model structure diagram；
Fig. 2, it is the utility model use state diagram.
Embodiment
Referring to Fig. 1, Fig. 2, the utility model includes linear pattern arch section 1 and arc-shaped joint 2, arc-shaped joint 2 are weldingly fixed on
In linear pattern arch section 1.
Arch springing is welded and fixed in the linear pattern arch lower end of section 1 and expands billet 3, encircles the upper end of section 1 and arc in linear pattern
Fixed bow member junction steel plate 4 is respectively welded in the lower end of joint 2.
The arc-shaped joint 2 encircles tangent at the starting the arc of section 1 with linear pattern.
Lock foot anchoring stock, which is opened up, on arch springing expansion billet 3 applies hole.
A kind of construction method of the above-mentioned unfavourable geological tunnel steel arch-shelf arch springing of falling V shape structure, comprises the following steps：
1) digged laterally at arch springing, after digging in place, just shotcrete support is carried out to excavation face；
2) bow member assembles, and first passes through each shaped steel section in arch using the assembled shaping of bolt, the linear pattern arch upper end of section 1
Bow member junction steel plate 4 connects arch 7, and the arch springing of the linear pattern arch lower end of section 1 expands billet 4 and stopped in first pneumatically placed concrete face
On, the lower end of arc-shaped joint 2 connects lower segmental arc 8 by bow member junction steel plate 4；
3) lock foot anchoring stock 5, lock foot anchoring stock and arch springing are applied at the arch springing expansion billet 4 of the linear pattern arch lower end of section 1
It is vertical to expand billet；
4) entirely the arch springing of falling V shape will finally be filled using gunite concrete 6, gunite concrete covering steel arch-shelf thickness is not
Less than 3cm.
Claims (5)
1. a kind of unfavourable geological tunnel steel arch-shelf arch springing of falling V shape structure, it is characterised in that including linear pattern arch section (1) and arc
Joint (2), arc-shaped joint (2) are fixed in linear pattern arch section (1).
A kind of 2. unfavourable geological tunnel steel arch-shelf arch springing of falling V shape structure according to claim 1, it is characterized in that in linear pattern
Encircle section (1) lower end and fix arch springing expansion billet (3), encircle section (1) upper end and arc-shaped joint (2) lower end point in linear pattern
Gu Ding not bow member junction steel plate (4).
3. a kind of unfavourable geological tunnel steel arch-shelf arch springing of falling V shape structure according to claim 1, it is characterised in that arc connects
Head (2) encircles tangent at the starting the arc of section (1) with linear pattern.
A kind of 4. unfavourable geological tunnel steel arch-shelf arch springing of falling V shape structure according to claim 2, it is characterized in that expanding in arch springing
Lock foot anchoring stock, which is opened up, on big billet (3) applies hole.
A kind of 5. unfavourable geological tunnel steel arch-shelf arch springing of falling V shape structure according to claim 1, it is characterized in that in linear pattern
The arch springing of arch section (1) lower end expands billet (3) place and applies lock foot anchoring stock (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720553115.2U CN206830200U (en) | 2017-05-17 | 2017-05-17 | A kind of unfavourable geological tunnel steel arch-shelf arch springing of falling V shape structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720553115.2U CN206830200U (en) | 2017-05-17 | 2017-05-17 | A kind of unfavourable geological tunnel steel arch-shelf arch springing of falling V shape structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206830200U true CN206830200U (en) | 2018-01-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201720553115.2U Active CN206830200U (en) | 2017-05-17 | 2017-05-17 | A kind of unfavourable geological tunnel steel arch-shelf arch springing of falling V shape structure |
Country Status (1)
| Country | Link |
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| CN (1) | CN206830200U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108868815A (en) * | 2018-08-20 | 2018-11-23 | 云南省红河州水利水电勘察设计研究院 | A kind of support system excavated for tunnel |
| CN111188629A (en) * | 2020-01-02 | 2020-05-22 | 中交第二航务工程局有限公司 | Construction method for sudden change of tunnel bifurcation section and expanding excavation |
-
2017
- 2017-05-17 CN CN201720553115.2U patent/CN206830200U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108868815A (en) * | 2018-08-20 | 2018-11-23 | 云南省红河州水利水电勘察设计研究院 | A kind of support system excavated for tunnel |
| CN111188629A (en) * | 2020-01-02 | 2020-05-22 | 中交第二航务工程局有限公司 | Construction method for sudden change of tunnel bifurcation section and expanding excavation |
| CN111188629B (en) * | 2020-01-02 | 2021-07-02 | 中交第二航务工程局有限公司 | Construction method for sudden change of tunnel bifurcation section and expanding excavation |
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