CN112523783B - Rapid assembled support bracket and support method - Google Patents
Rapid assembled support bracket and support method Download PDFInfo
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- CN112523783B CN112523783B CN201910884296.0A CN201910884296A CN112523783B CN 112523783 B CN112523783 B CN 112523783B CN 201910884296 A CN201910884296 A CN 201910884296A CN 112523783 B CN112523783 B CN 112523783B
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- shield
- wedge
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- shaped
- arc
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/14—Lining predominantly with metal
- E21D11/18—Arch members ; Network made of arch members ; Ring elements; Polygon elements; Polygon elements inside arches
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/14—Lining predominantly with metal
- E21D11/18—Arch members ; Network made of arch members ; Ring elements; Polygon elements; Polygon elements inside arches
- E21D11/22—Clamps or other yieldable means for interconnecting adjacent arch members either rigidly, or allowing arch member parts to slide when subjected to excessive pressure
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention discloses a quick assembled support bracket and a support method, comprising a plurality of annular shield groups which are sequentially arranged on the inner wall of a tunnel; the shield group comprises shield pieces, and the ends of the adjacent shield pieces are connected; the shield plates are fixedly arranged at two end parts of the shield frame, the shield frame is of an arc structure, and the shield frame is connected through the head and the tail of the shield plate to form a closed circular ring; the shield piece comprises at least one wedge-shaped block, two connecting blocks corresponding to the wedge-shaped block and a plurality of standard blocks, the wedge-shaped block, the connecting blocks and the standard blocks are all arc-shaped, the connecting blocks are symmetrically arranged on two sides of the wedge-shaped block, and the wedge-shaped block is connected with the standard blocks through the connecting blocks; the quick assembling type supporting bracket is simple in structure, the installation tightness of the shield assembly is guaranteed by the wedge-shaped blocks, the self-tightening effect after installation is achieved, the self-locking effect is achieved, quick assembling of the I-shaped steel supporting bracket can be achieved, and the supporting installation efficiency is improved.
Description
Technical Field
The invention relates to the technical field of tunnel engineering support, in particular to a quick assembling type support bracket and a support method.
Background
At present, an open type TBM (full face tunnel boring machine) has strong engineering adaptability under II and III class surrounding rock conditions, can ensure the safety, quality and speed of tunnel construction, and can save the tunnel construction cost; with the technical progress in recent years, particularly the development of the primary support technology, the comprehensive support technology of a steel arch frame (also called steel support) and a steel bar row and the corresponding construction process are reasonably used, the engineering adaptability of the open TBM under the IV-class surrounding rock condition is greatly enhanced, and the tunneling speed is greatly improved on the premise of ensuring the safety and the quality.
However, in order to ensure the stability of the whole state of the existing steel arch support, the general setting process is complex, so that the installation is difficult, and the support efficiency is influenced.
In view of the above-mentioned drawbacks, the present inventors have finally obtained the present invention through long-term research and practice.
Disclosure of Invention
In order to solve the technical defects, the invention adopts the technical scheme that the quick assembling type supporting bracket comprises a plurality of annular shield groups which are sequentially arranged on the inner wall of the tunnel; the shield group comprises shield pieces, and the end parts of the adjacent shield pieces are connected; the shield plates comprise shield frames and shield plates, the shield plates are fixedly arranged at two end parts of the shield frames, the shield frames are of arc structures, and the shield frames are connected through the heads and the tails of the shield plates to form a closed circular ring;
the shield piece comprises at least one wedge-shaped block, two connecting blocks corresponding to the wedge-shaped block and a plurality of standard blocks, wherein the wedge-shaped block, the connecting blocks and the standard blocks are all arc-shaped, the connecting blocks are symmetrically arranged on two sides of the wedge-shaped block, and the wedge-shaped block is connected with the standard blocks through the connecting blocks;
the two end edges of the standard block are parallel to the axis of the shield piece, the end edge connected with the standard block and the axis of the shield piece are parallel, the two end edges of the wedge block and the axis of the shield piece form an inclined included angle, and the end edge connected with the wedge block is matched with the end edge of the wedge block to be arranged.
Preferably, the shield frame is made of i-steel, the shield frame comprises at least two arc-shaped parts arranged in parallel and a reinforcing part connected with the arc-shaped parts, and the arc-shaped parts are bent through the i-steel; the shield plates are made of groove-shaped steel and are fixedly arranged on two end parts of the arc-shaped part.
Preferably, the shield plate is provided with first mounting holes, and adjacent shield segments are connected through the first mounting holes, so as to form the annular shield group.
Preferably, the shield frame is provided with a second mounting hole, and adjacent shield groups are connected through the second mounting hole, so as to form an extendable tubular structure.
Preferably, the joints of adjacent shield groups are arranged in a staggered manner.
Preferably, a positioning assembly is further arranged on the shield plate, the positioning assembly comprises a movable pin and a guide groove, the movable pin or the guide groove is arranged on the shield plate, and the movable pin and the guide groove of each adjacent shield piece are correspondingly arranged.
Preferably, the movable pin comprises an installation cavity, an elastic part and a pin, the installation cavity is fixedly arranged on the shield plate, the elastic part is arranged in the installation cavity, a positioning hole is formed in the shield plate, one end of the pin extends out of the positioning hole, the other end of the pin is arranged in the installation cavity, and the elastic part is simultaneously connected with the installation cavity and the pin and provides elastic force.
Preferably, the elastic part is a spring, the pin is a cylindrical structure, a clamping ring is further arranged in the middle of the pin, and the outer diameter of the clamping ring is larger than the diameter of the positioning hole; the elastic piece is sleeved on the end part of the pin column arranged in the installation cavity, and the two ends of the elastic piece are respectively arranged on the clamping ring and the inner wall of the installation cavity.
Preferably, the guide groove is further provided with a positioning groove, the positioning groove is a circular groove, and the depth dimension of the positioning groove is larger than that of the guide groove.
Preferably, the supporting method of the quick assembling type supporting bracket comprises the following steps of;
s1, connecting the standard blocks into a whole to form an arc body;
s2, fixedly connecting the connecting blocks at two ends of the arc body respectively to form an annular structure with a notch;
s3, placing the wedge blocks corresponding to the notches, horizontally moving the wedge blocks into the notches along the axial direction of the shield group, and finally forming the annular shield group;
and S4, connecting the shield groups or arranging the shield groups at intervals to form the quick assembling type supporting bracket.
Compared with the prior art, the invention has the beneficial effects that: the quick assembling type supporting bracket is simple in structure, the installation tightness of the shield assembly is guaranteed by the wedge-shaped blocks, the self-tightening effect after installation is achieved, the self-locking effect is achieved, quick assembling of the I-shaped steel supporting bracket can be achieved, and the installation efficiency of supporting is improved.
Drawings
FIG. 1 is a perspective view of the shield assembly;
FIG. 2 is a side view of the shield assembly;
FIG. 3 is a structural view of the shield plate;
FIG. 4 is a structural view of the wedge block;
FIG. 5 is a structural view of the connecting block;
FIG. 6 is a structural view of the standard block;
fig. 7 is a structural view of the positioning assembly.
The figures in the drawings represent:
1-a wedge-shaped block; 2, connecting blocks; 3-standard block; 11-shield frame; 12-shield plate; 13-a first mounting hole; 14-a second mounting hole; 15-a guide groove; 16-mounting a cavity; 17-an elastic member; 18-pin; 19-positioning holes; 20-snap ring.
Detailed Description
The above and further features and advantages of the present invention are described in more detail below with reference to the accompanying drawings.
Example one
The quick assembling type supporting bracket comprises a plurality of annular shield groups which are sequentially arranged on the inner wall of the tunnel; as shown in fig. 1 and fig. 2, fig. 1 is a perspective view of the shield group; FIG. 2 is a side view of the shield set. The shield group comprises shield pieces, and the ends of the adjacent shield pieces are connected; the shield piece includes shield 11 and shield board 12, shield board 12 is fixed to be set up the both ends of shield 11, shield 11 sets up to the arc structure, shield 11 passes through shield board 12 end to end forms the closed ring.
The shield frame 11 adopts I-steel welding preparation, the shield frame 11 includes two at least parallel arrangement's arc portion and connection the rib of arc portion, the arc portion is through the I-steel system of bending, thereby guarantees the overall structure of shield frame 11 is stable. As shown in FIG. 3, FIG. 3 is a structural view of the shield plate 12; the shield plates 12 are made of channel steel and are fixedly arranged at two end parts of the arc-shaped part by welding.
Generally, the shield plate 12 is provided with a first mounting hole 13, the shield 11 is provided with a second mounting hole 14, and the second mounting hole 14 is generally arranged on the side end face of the arc-shaped part; the first mounting hole 13 and the second mounting hole 14 can be both through holes, and the first mounting hole 13 and the second mounting hole 14 are uniformly arranged; adjacent shield segments are bolted through the first mounting holes 13, so that annular shield groups are formed; adjacent shield sets are bolted through the second mounting holes 14 to form an extendable tubular structure.
The shield constructs the piece including at least one wedge 1, corresponds one two connecting blocks 2 and a plurality of standard block 3 of wedge 1, wedge 1 connecting block 2 with standard block 3 is the circular arc type, connecting block 2 symmetry set up in the both sides of wedge 1, just wedge 1 passes through connecting block 2 with standard block 3 is connected to form annular finally the shield group.
As shown in fig. 4, 5 and 6, fig. 4 is a structural view of the wedge-shaped block; FIG. 5 is a structural view of the connecting block; fig. 6 is a structural view of the standard block. The both ends limit of standard block 3 is on a parallel with the axis setting of shield piece, connecting block 2 with the end limit that standard block 3 is connected with the axis parallel arrangement of shield piece, the both ends limit of wedge 1 with the axis of shield piece forms certain slope contained angle, and is corresponding, connecting block 2 with the end limit cooperation that wedge 1 is connected the end limit setting of wedge 1.
Specifically, the end surfaces of the two shield plates 12 on the standard block 3 are parallel to the axis of the shield piece, and the shield plates 12 connected with the standard block 3 by the connecting block 2 are also parallel to the axis of the shield piece, so as to ensure the stable connection between the standard block 3 and the connecting block 2; two on the wedge 1 shield plate 12 terminal surfaces with the axis of shield piece forms the slope contained angle, connecting block 2 with the wedge 1 is connected shield plate 12 with the axis of shield piece form with the same angle of slope contained angle to guarantee the wedge 1 with the stable connection of connecting block 2.
In a specific embodiment, the shield segment is provided with one wedge block 1, two connecting blocks 2 and three standard blocks 3, and the central line arc segment angle θ of the standard block 3 1 Is 65 degrees, and the central line arc segment angle theta of the connecting block 2 2 Is 65 degrees, and the angle theta of the arc segment of the central line of the wedge-shaped block 1 3 Is 35 degrees, the inclined included angle theta 4 Is 6 to 8 degrees. Because the connecting block 2 and the shield plate 12 on the wedge block 1 are both obliquely arranged, the angles of the arc sections at different positions of the wedge block 1 and the connecting block 2 are different, the angles of the arc sections at the central line positions of the wedge block 1 and the connecting block 2 are used as a reference for setting, and the lengths of the wedge block 1 and the adjacent shield plates 12 on two sides of the connecting block 2 are different.
Meanwhile, it is worth pointing out that the shield segment may only be provided with the wedge block 1 and the connecting block 2, the end of the connecting block 2 is matched with the end of the wedge block 1, the wedge block 1 and the connecting block 2 are connected in a staggered manner, and the annular shield group may also be formed.
Preferably, the joints of the adjacent shield groups are arranged in a staggered manner, so that the structural rigidity and strength of the quick assembling type supporting bracket are improved.
The quick assembling type supporting bracket is simple in structure, and the connection of all parts is realized by adopting a mode of arranging the mounting holes, so that the quick assembling of the I-shaped steel supporting bracket can be realized, and the mounting efficiency of supporting is improved.
Corresponding to a small-sized tunneling tunnel, due to the fact that anchor rods and other supports cannot be used due to the limitation of the diameter of the section of the tunnel, the surrounding rock deformation and instability can be effectively prevented by the aid of the method, the method can be quickly assembled, disassembled and recycled, and the method can be used for disassembling the next tunnel after the function of the tunnel is used up. The assembly of the invention is carried out by a segment erector which is carried by the TBM, and the invention has high mechanization degree and is easy to assemble.
Example two
And a positioning assembly is further arranged on the shield plate 12 and used for realizing the pre-positioning when the adjacent shield pieces are installed.
As shown in fig. 7, fig. 7 is a structural view of the positioning assembly; the positioning assembly comprises a movable pin and a guide groove 15, the movable pin or the guide groove 15 is arranged on the shield plate 12, and the movable pin and the guide groove 15 of two adjacent shield pieces are correspondingly arranged.
As shown in fig. 3 and 4, fig. 3 is a structural view of the shield plate 12 provided with the positioning grooves; fig. 4 is a structural view of the shield plate 12 provided with the movable pin; generally, the guide grooves 15 extend along the width direction of the shield segment, so as to facilitate the installation of the shield segment. Going on during the equipment of shield structure piece, owing to need will shield structure piece equipment ring structure, the installation last shield piece, promptly during wedge 1, owing to the setting of ring structure itself, wedge 1 need be followed shield structure group axis direction translation is corresponding in order to avoid the installation shield board 12 takes place to interfere, through guide way 15 with the setting of removable pin can realize adjacent two the guide effect of shield structure piece relative translation to be convenient for realize adjacent guide positioning when shield structure piece is installed.
As shown in fig. 5, fig. 5 is a structural view of the movable pin; the movable pin includes installation cavity 16, elastic component 17 and round pin post 18, installation cavity 16 is fixed to be set up on the shield board 12, elastic component 17 set up in the installation cavity 16, be provided with locating hole 19 on the shield board 12, the one end of round pin post 18 stretches out locating hole 19, the other end setting of round pin post 18 is in the installation cavity 16, just elastic component 17 simultaneously with installation cavity 16 with round pin post 18 is connected to provide elasticity. The pin 18 can realize stable telescopic adjustment under the elastic force of the elastic member 17.
Specifically, the elastic member 17 is provided with a spring, the pin 18 is provided with a cylindrical structure, and a snap ring 20 is further provided at a middle position of the pin 18, wherein an outer diameter of the snap ring 20 is larger than a diameter of the positioning hole 19, so as to limit the position of the pin 18; the elastic member 17 is sleeved on the end portion of the pin 18 disposed in the mounting cavity 16, and two ends of the elastic member 17 are respectively disposed on the snap ring 20 and the inner wall of the mounting cavity 16, so as to provide an elastic force for the pin 18, so that the end portion of the pin 18 tends to extend out of the positioning hole 19.
The mounting cavity 16 can be set to be a U-shaped plate, an L-shaped plate or a box body structure or other reasonable structures.
Generally, the guide groove 15 is further provided with a positioning groove, the positioning groove is a circular groove, and the depth of the positioning groove is greater than the depth of the guide groove 15. When the ends of the pins 18 move along the guide slots 15 to the locating slot position, the first mounting holes 13 on the shield plate 12 are arranged in a one-to-one correspondence, so that the mounting arrangement of bolts on the first mounting holes 13 is facilitated.
The end of the pin 18 corresponding to the guide slot 15 may be provided with a ball shape so as to facilitate the movement of the pin 18 within the guide slot 15. Meanwhile, in this embodiment, the movable pin can be elastically compressed under the action of the elastic member 17, so that when the connecting block 2 and the wedge block 1 are installed, the end of the pin 18 can be always ensured to be arranged in the guide groove 15 along with the change of the gap between the connecting block 2 and the two corresponding shield plates 12 on the wedge block 1, and the guide effect can be always realized in the process of connecting the connecting block 2 and the wedge block 1.
EXAMPLE III
The invention relates to a supporting method of a quick assembling type supporting bracket, which specifically comprises the following steps;
s1, connecting the standard blocks into a whole to form an arc body;
s2, fixedly connecting the connecting blocks at two ends of the arc body respectively to form an annular structure with a notch;
s3, placing the wedge blocks corresponding to the notches, horizontally moving the wedge blocks into the notches along the axial direction of the shield group, and finally forming the annular shield group;
and S4, connecting the shield groups or arranging the shield groups at intervals to form the quick assembling type supporting bracket.
Generally, the connection between the standard blocks 3 and the connection between the connecting block 2 and the standard blocks 3 are all in a bolt connection manner, that is, the connection between the connecting block 2 and the standard blocks 3 is realized through the first mounting holes 13.
In the step S1 and the step S2, the bolts are not tightened by the connection between the standard blocks 3, the connection between the connecting block 2 and the standard blocks 3, and after the step S3 pushes the wedge block 1 into the notch to make the connecting positions tightly fit, the bolts at the connecting positions are tightened one by one to realize the structural stability of the whole shield assembly.
Through setting up wedge 1 guarantees the compactness of shield group installation reaches the effect of installation back self-tightening, and under the operation that wedge 1 level was impressed, can obtain certain pretightning force, realize the auto-lock effect.
The foregoing is merely a preferred embodiment of the invention, which is intended to be illustrative and not limiting. It will be understood by those skilled in the art that various changes, modifications and equivalents may be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (8)
1. A quick assembling type supporting bracket is characterized by comprising a plurality of annular shield groups which are sequentially arranged on the inner wall of a tunnel; the shield group comprises shield pieces, and the end parts of the adjacent shield pieces are connected; the shield piece comprises shield frames and shield plates, the shield plates are fixedly arranged at two end parts of the shield frames, the shield frames are of arc structures, and the shield frames are connected through the shield plates in a head-tail mode to form a closed circular ring;
the shield piece comprises at least one wedge-shaped block, two connecting blocks corresponding to the wedge-shaped block and a plurality of standard blocks, the wedge-shaped block, the connecting blocks and the standard blocks are all arc-shaped, the connecting blocks are symmetrically arranged on two sides of the wedge-shaped block, and the wedge-shaped block is connected with the standard blocks through the connecting blocks;
the shield plate is also provided with a positioning assembly, the positioning assembly comprises a movable pin and a guide groove, the movable pin or the guide groove is arranged on the shield plate, and the movable pin and the guide groove of two adjacent shield pieces are correspondingly arranged;
the movable pin comprises an installation cavity, an elastic piece and a pin, the installation cavity is fixedly arranged on the shield plate, the elastic piece is arranged in the installation cavity, a positioning hole is formed in the shield plate, one end of the pin extends out of the positioning hole, the other end of the pin is arranged in the installation cavity, and the elastic piece is simultaneously connected with the installation cavity and the pin and provides elastic force.
2. The quick assembling type supporting bracket according to claim 1, wherein the shield frame is made of i-steel, the shield frame comprises at least two arc-shaped parts arranged in parallel and a reinforcing part connecting the arc-shaped parts, and the arc-shaped parts are bent by the i-steel; the shield plates are made of groove-shaped steel and fixedly arranged on the two end parts of the arc-shaped parts.
3. The quick assembling type supporting bracket as claimed in claim 1, wherein said shield plate is provided with first mounting holes, and adjacent shield pieces are connected through said first mounting holes, thereby forming said annular shield group.
4. A quick-sectional support bracket according to claim 1, wherein said shield frames are provided with second mounting holes through which adjacent sets of said shields are connected to form an extendable tubular structure.
5. The quick erectable support brace of claim 1, wherein the joints of adjacent shield sets are arranged in staggered relation.
6. The quick assembling type supporting bracket according to claim 1, wherein the elastic member is a spring, the pin is a cylindrical structure, a clamping ring is further arranged in the middle of the pin, and the outer diameter of the clamping ring is larger than the diameter of the positioning hole; the elastic piece is sleeved on the end part of the pin column arranged in the installation cavity, and the two ends of the elastic piece are respectively arranged on the clamping ring and the inner wall of the installation cavity.
7. The quick assembling type support bracket according to claim 1, wherein the guide groove is further provided with a positioning groove, the positioning groove is a circular groove, and the depth dimension of the positioning groove is greater than that of the guide groove.
8. A method of supporting a quick assemble supporting bracket as claimed in any one of claims 1 to 7, including the steps of;
s1, connecting the standard blocks into a whole to form an arc body;
s2, fixedly connecting the connecting blocks at two ends of the arc body respectively to form an annular structure with a notch;
s3, placing the wedge-shaped block corresponding to the notch, horizontally moving the wedge-shaped block into the notch along the axial direction of the shield group, and finally forming the annular shield group;
and S4, connecting the shield groups or arranging the shield groups at intervals to form the quick assembling type supporting bracket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910884296.0A CN112523783B (en) | 2019-09-17 | 2019-09-17 | Rapid assembled support bracket and support method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910884296.0A CN112523783B (en) | 2019-09-17 | 2019-09-17 | Rapid assembled support bracket and support method |
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| Publication Number | Publication Date |
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| CN112523783A CN112523783A (en) | 2021-03-19 |
| CN112523783B true CN112523783B (en) | 2023-01-06 |
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| CN108194099A (en) * | 2018-02-09 | 2018-06-22 | 江苏格睿特管网工程有限公司 | The connection structure of quick-assembling shield duct piece and its assembled engineering method |
| CN109209401A (en) * | 2018-09-28 | 2019-01-15 | 中铁第勘察设计院集团有限公司 | Shield tunnel inner circular support system and its construction method based on brace pre axial force |
| CN210858746U (en) * | 2019-09-17 | 2020-06-26 | 安徽理工大学 | Quick pin-connected panel support |
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2019
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000034896A (en) * | 1998-07-17 | 2000-02-02 | Okumura Corp | Structure of tunnel timbering body |
| JP2000034895A (en) * | 1998-07-17 | 2000-02-02 | Okumura Corp | Tunnel timbering unit and structure of tunnel timbering body |
| JP2001288997A (en) * | 2000-04-07 | 2001-10-19 | Taisei Corp | Gauge for tunnel open section |
| CN201460906U (en) * | 2009-06-09 | 2010-05-12 | 中铁第四勘察设计院集团有限公司 | 9+1 partitioned structure of shield tunnel lining ring |
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| CN210858746U (en) * | 2019-09-17 | 2020-06-26 | 安徽理工大学 | Quick pin-connected panel support |
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