CN209925004U - Temporary transverse support and supporting device for double-side-wall pilot tunnel - Google Patents
Temporary transverse support and supporting device for double-side-wall pilot tunnel Download PDFInfo
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- CN209925004U CN209925004U CN201920416597.6U CN201920416597U CN209925004U CN 209925004 U CN209925004 U CN 209925004U CN 201920416597 U CN201920416597 U CN 201920416597U CN 209925004 U CN209925004 U CN 209925004U
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Abstract
The utility model discloses an interim cross bracing and strutting arrangement of double-side wall pilot tunnel, this interim cross bracing in main hole steel bow member with erect temporarily and support between, interim cross bracing is for adopting the prefabricated banding bracing piece that forms of mould concrete and arrangement of reinforcement, the both ends of bracing piece are equipped with the butt joint of indent and dodge the district, the butt joint dodges the shape in district and cooperatees with the end of treating interfacing apparatus. The utility model discloses a cross bracing has easy dismounting, repeatedly usable, can reduce cost to can improve advantages such as tunnel security, the utility model discloses an interim strutting arrangement utilizes this interim cross bracing to possess above-mentioned advantage equally.
Description
Technical Field
The utility model relates to a temporary support structure especially relates to a two lateral wall pilot tunnel are horizontal support and strutting arrangement temporarily.
Background
The existing large-section weak surrounding rock tunnel is usually constructed by a double-side-wall pit guiding method, after two side-wall pits are excavated, the pressure of the tunnel excavated surrounding rock is increased, the bending moment and the axial force borne by a supporting device are gradually increased, and a primary supporting structure can obviously slide and deform into a tunnel. In this process, the lateral support cannot be reused. The problems with this approach are: the installation process is time-consuming; the demolition process is noisy and dusty, and a large amount of building rubbish and waste steel can be generated; there is a certain risk in performing the oxygen welding and cutting operation in such a narrow space as a tunnel.
SUMMERY OF THE UTILITY MODEL
The utility model discloses to the problem that prior art exists, provide a easy dismounting, repeatedly usable, can reduce cost to can improve the interim cross support of the double-side wall pilot tunnel of tunnel security, still provide an interim strutting arrangement who utilizes this interim cross support's stable in structure.
In order to solve the technical problem, the utility model provides a technical scheme does:
the utility model provides a two lateral wall pilot tunnel cross braces temporarily, transversely support in main hole steel bow member with erect temporarily and support between, the strip bracing piece that the cross braces is prefabricated for adopting mould concrete and arrangement of reinforcement to form temporarily, the both ends of bracing piece are equipped with the butt joint of indent and dodge the district, the shape that the district was dodged in the butt joint cooperatees with the end of treating interfacing apparatus.
The temporary transverse support of the double-side-wall pit-guiding tunnel is further improved as follows:
the both ends of bracing piece are equipped with the breach of dodging that is used for dodging the end of treating the interfacing apparatus, the bottom of dodging the breach is equipped with and treats interfacing apparatus's end cross sectional shape matched with butt joint steel sheet, and the butt joint steel sheet encloses with dodging the breach and establishes into the district is dodged in the butt joint.
The support rod is split into two connecting rods from the middle part, one ends of the two connecting rods are fixedly connected together to form a joint, and the non-fixedly connected ends of the two connecting rods are respectively provided with one butt joint avoiding area.
The fixed connection end of one connecting rod is provided with a protruding plug, the fixed connection end of the other connecting rod is provided with an inward-sunk slot, and the plug and the slot are mutually spliced to form the joint.
The plug and the slot are provided with a plurality of through holes corresponding to the positions in the overlapping area of the plug and the slot, and the plug and the slot are inserted into the through holes through fasteners for fixation.
The through holes are three, and the arrangement positions of the three through holes are three vertexes of an equilateral triangle.
The butt steel plate is fixedly connected with the reinforcing bars inside the supporting rods.
The utility model discloses still correspondingly provide a two lateral wall pilot tunnel interim strutting arrangement, erect including main hole steel bow member and interim and support, main hole steel bow member erects to support between with interim and has foretell interim cross bracing along horizontal support.
In addition, the utility model also provides an utilize foretell interim strutting arrangement's assembly method, its step includes:
s1: prefabricating the supporting rod by using molded concrete and reinforcing bars on a construction site;
s2: digging steps on the side walls of the double-side-wall pit guiding tunnel, and mounting the support rods manufactured in the step S1 on the steps;
s3: fixedly connecting the end of the main tunnel steel arch frame with a butt joint avoidance area at one end of the supporting rod; the end head of the temporary vertical support is fixedly connected with the butt joint avoiding area at the other end of the support rod;
s4: fixedly connecting the two connecting rods to complete the assembly of the supporting rod;
s5: and covering soil at two ends of the supporting rod to finish assembly.
And a method for disassembling the temporary support device, comprising the following steps:
s1: digging the covering soil at the two ends of the supporting rod;
s2: splitting the support rod into two connecting rods from the middle part, and sequentially lifting the two connecting rods out;
s3: and sequentially hoisting the main tunnel steel arch frame and the temporary vertical supports out to finish the disassembly.
Compared with the prior art, the utility model has the advantages of:
the utility model discloses for the construction in convenient big section weak country rock tunnel, the corresponding interim cross bracing that has proposed a double-side wall pilot tunnel, this interim cross bracing is one kind and adopts the prefabricated bracing piece that forms of mould concrete and arrangement of reinforcement before strutting. When supporting, the support rod of the utility model can be conveniently connected and fixed with the main tunnel steel arch frame and the temporary vertical support without the steps of welding the steel arch frame, pouring concrete and the like on site; after partial tunnel construction is accomplished, when this section need not strut again, the utility model discloses a dismantlement that the bracing piece can be convenient gets off to can transport to next construction section and install and strut. Compared with the traditional transverse support formed by pouring concrete, the temporary transverse support of the utility model is more convenient to install and disassemble, not only saves a large amount of manpower, material resources and time, but also can not generate noise, dust and other pollution, and simultaneously improves the safety performance; and because this interim horizontal braces has the characteristics that can used repeatedly, can save a large amount of manufacturing cost, reduced the production of building rubbish and waste material. In addition, the supporting device for the temporary transverse support of the double-side-wall pilot tunnel has stable structure, can quickly form a closed support of an excavation surface, provides higher supporting strength, effectively controls the convergence of the tunnel and ensures the construction safety; the utility model discloses an assembly method, the interim horizontal braces of the above-mentioned double-side wall pilot tunnel of installation that can high efficiency improves site operation efficiency.
Drawings
Fig. 1 is a schematic structural view of a temporary transverse support of a double-side-wall tunnel of the present invention;
fig. 2 is a schematic top view of the temporary lateral support of the double-side-wall tunnel of the present invention;
fig. 3 is a schematic view of the connection structure of the temporary supporting device of the present invention.
Illustration of the drawings: 1. a main tunnel steel arch frame; 2. temporary vertical support; 3. a support bar; 31. a butt joint avoidance area; 311. butting steel plates; 32. a connecting rod; 33. a joint; 331. a plug; 332. a slot; 333. and a through hole.
Detailed Description
In order to facilitate understanding of the present invention, the present invention will be described more fully and specifically with reference to the accompanying drawings and preferred embodiments, but the scope of the present invention is not limited to the following specific embodiments.
Example (b):
as shown in fig. 1 to 3, the temporary transverse support of the double-side-wall pilot tunnel of the embodiment is transversely supported between the main tunnel steel arch 1 and the temporary vertical support 2, the temporary transverse support is a strip-shaped support rod 3 prefabricated by using mold concrete and reinforcing bars, and when supporting, the support rod 3 can be conveniently connected and fixed with the main tunnel steel arch 1 and the temporary vertical support 2 without welding the steel arch, pouring concrete and other steps on site; after the construction of partial tunnel, when this section need not be strutted again, bracing piece 3 can convenient dismantlement get off to can transport to next construction section and install and strut. Compared with the traditional transverse support formed by pouring concrete, the temporary transverse support of the embodiment is more convenient to mount and dismount, not only saves a large amount of manpower, material resources and time, but also does not generate noise, dust and other pollution, and simultaneously improves the safety performance; and because this interim horizontal braces has the characteristics that can used repeatedly, can save a large amount of manufacturing cost, reduced the production of building rubbish and waste material.
In this embodiment, the two ends of the support rod 3 are respectively provided with an avoidance notch for avoiding the ends of the main tunnel steel arch 1 and the temporary vertical support 2, the bottom of the avoidance notch is provided with a butt steel plate 311 matched with the cross-sectional shapes of the ends of the main tunnel steel arch 1 and the temporary vertical support 2, and the butt steel plate 311 and the avoidance notch are surrounded to form a butt avoidance area 31. The end of main hole steel bow member 1 and interim perpendicular support 2 respectively with the butt joint steel sheet 311 fixed connection of bracing piece 3 tip, dodge two walls of breach and main hole steel bow member 1 and interim perpendicular end contact of supporting 2 to for it provides the holding power, compare in simple welded connection, the joint strength who dodges district 31 is higher in the butt joint, and stability is better. The butt steel plate 311 is fixedly connected with the reinforcing bars inside the supporting rods 3, so that the connection strength is further improved, and the supporting stability is improved.
In this embodiment, the support rod 3 is split into two connecting rods 32 from the middle, one ends of the two connecting rods 32 are fixedly connected together to form a joint 33, and the non-fixed ends of the two connecting rods 32 are respectively provided with a butt joint avoiding area 31. When the installation is strutted, two connecting rods 32 earlier respectively with main hole steel bow member 1 with erect support 2 fixed connection temporarily, later two connecting rods 32 are fixed into again and connect 33, each device of Ten move among the easy to assemble process, prevent to appear because of the too narrow problem that causes the unable installation of installation allowance of reserving of hole jing not enough.
In this embodiment, a protruding plug 331 is disposed at the fixed end of one of the connecting rods 32, an inward-recessed slot 332 is disposed at the fixed end of the other connecting rod 32, and the plug 331 and the slot 332 are inserted into each other to form the joint 33; the plug 331 and the slot 332 are provided with a plurality of through holes 333 corresponding to the overlapping area, and the plug 331 and the slot 332 are fixed by a fastener penetrating through the through holes 333 after being plugged. This manner of plug connection provides a higher strength for the joint 33, further improving the lateral support strength. The number of the through holes 333 is three, and the arrangement positions of the three through holes 333 are three vertexes of an equilateral triangle, so that uniform and stable supporting force is provided for the support rod 3, and the connection stability is improved.
The temporary supporting device for the double-side-wall pit guiding tunnel in the embodiment comprises a main tunnel steel arch 1 and a temporary vertical support 2, wherein the temporary horizontal support is transversely supported between the main tunnel steel arch 1 and the temporary vertical support 2, as shown in fig. 3. The supporting device for the temporary transverse support of the double-side-wall pilot tunnel is stable in structure, higher supporting strength can be provided, and construction safety is guaranteed.
The present embodiment further provides an assembling method using the temporary supporting device, which includes the steps of:
s1: prefabricating the supporting rod 3 by utilizing molded concrete and reinforcing bars on a construction site;
s2: digging steps on the side walls of the double-side-wall pit guiding tunnel, and mounting the support rods 3 manufactured in the step S1 on the steps;
s3: fixedly connecting the end of the main tunnel steel arch 1 with a butt joint avoidance area 31 at one end of a support rod 3; the end of the temporary vertical support 2 is fixedly connected with a butt joint avoidance area 31 at the other end of the support rod 3;
s4: fixedly connecting the two connecting rods 32 to complete the assembly of the supporting rod 3;
s5: and covering soil at two ends of the support rod 3 to finish assembly.
And a method for disassembling the temporary supporting device, comprising the following steps:
s1: digging the covering soil at two ends of the supporting rod 3;
s2: the support rod 3 is split into two connecting rods 32 from the middle part, and the two connecting rods 32 are sequentially lifted out;
s3: and (4) sequentially hoisting the main tunnel steel arch frame 1 and the temporary vertical supports 2 out to finish the disassembly.
The support assembling method and the disassembling method can quickly and efficiently disassemble the temporary transverse support of the double-side-wall pit-guiding tunnel, and improve the field construction efficiency.
The above description is only the preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. For those skilled in the art, the modifications and changes obtained without departing from the technical idea of the present invention should be regarded as the protection scope of the present invention.
Claims (8)
1. The utility model provides a two lateral wall pilot tunnel cross braces temporarily, transversely support in main hole steel bow member (1) and temporarily erect between supporting (2), its characterized in that: the temporary transverse support is a strip-shaped support rod (3) which is prefabricated by adopting molded concrete and reinforcing bars, two ends of the support rod (3) are provided with inwards concave butt joint avoiding areas (31), and the shapes of the butt joint avoiding areas (31) are matched with the ends of the devices to be butted.
2. The temporary lateral support of the double-side-wall pit-guiding tunnel according to claim 1, characterized in that: the both ends of bracing piece (3) are equipped with the breach of dodging that is used for dodging the end of treating the interfacing apparatus, the bottom of dodging the breach is equipped with and treats interfacing apparatus's end cross sectional shape matched with butt joint steel sheet (311), and butt joint steel sheet (311) with dodge the breach and enclose and establish into district (31) is dodged in the butt joint.
3. The temporary lateral support of the double-side-wall pit-guiding tunnel according to claim 2, wherein: the support rod (3) is split into two connecting rods (32) from the middle part, one ends of the two connecting rods (32) are fixedly connected together to form a joint (33), and the non-fixedly connected ends of the two connecting rods (32) are respectively provided with one butt joint avoiding area (31).
4. The temporary lateral support of the double-side-wall pit-guiding tunnel according to claim 3, wherein: the fixed connection end of one connecting rod (32) is provided with a protruding plug (331), the fixed connection end of the other connecting rod (32) is provided with an inward-recessed slot (332), and the plug (331) and the slot (332) are mutually inserted to form the joint (33).
5. The temporary lateral support of the double-side-wall pit-guiding tunnel according to claim 4, wherein: the plug (331) and the slot (332) are provided with a plurality of through holes (333) corresponding to the positions in the overlapping area, and the plug (331) and the slot (332) are inserted and fixed through the through holes (333) by fasteners.
6. The temporary lateral support of the double-side-wall pit-guiding tunnel according to claim 5, wherein: the number of the through holes (333) is three, and the arrangement positions of the three through holes (333) are three vertexes of an equilateral triangle.
7. The temporary lateral support of the double-side-wall pit-guiding tunnel according to claim 2, wherein: the butt steel plate (311) is fixedly connected with a reinforcing bar in the supporting rod (3).
8. The utility model provides a two lateral wall pilot tunnel temporary support device, includes main hole steel bow member (1) and erects temporarily and support (2), its characterized in that: the temporary transverse support as claimed in any one of claims 1-7 is supported between the main tunnel steel arch (1) and the temporary vertical support (2) along the transverse direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920416597.6U CN209925004U (en) | 2019-03-28 | 2019-03-28 | Temporary transverse support and supporting device for double-side-wall pilot tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920416597.6U CN209925004U (en) | 2019-03-28 | 2019-03-28 | Temporary transverse support and supporting device for double-side-wall pilot tunnel |
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| CN209925004U true CN209925004U (en) | 2020-01-10 |
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| CN201920416597.6U Active CN209925004U (en) | 2019-03-28 | 2019-03-28 | Temporary transverse support and supporting device for double-side-wall pilot tunnel |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109882207A (en) * | 2019-03-28 | 2019-06-14 | 中铁十六局集团第一工程有限公司 | The interim horizontal support in double -side approach tunnel, support device and its assembly, method for dismounting |
-
2019
- 2019-03-28 CN CN201920416597.6U patent/CN209925004U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109882207A (en) * | 2019-03-28 | 2019-06-14 | 中铁十六局集团第一工程有限公司 | The interim horizontal support in double -side approach tunnel, support device and its assembly, method for dismounting |
| CN109882207B (en) * | 2019-03-28 | 2024-06-14 | 中铁十六局集团第一工程有限公司 | Temporary transverse support and support device for double-side-wall pilot tunnel and assembling and disassembling method thereof |
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