CN109538242B - Building method of tunnel construction formwork support - Google Patents
Building method of tunnel construction formwork support Download PDFInfo
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- CN109538242B CN109538242B CN201811237778.9A CN201811237778A CN109538242B CN 109538242 B CN109538242 B CN 109538242B CN 201811237778 A CN201811237778 A CN 201811237778A CN 109538242 B CN109538242 B CN 109538242B
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- rod
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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
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
- E21D11/102—Removable shuttering; Bearing or supporting devices therefor
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- Mining & Mineral Resources (AREA)
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- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention relates to a method for building a formwork support, in particular to a method for building a tunnel construction formwork support, which has the technical scheme that the method comprises the following steps: a: prefabricating a steel pipe for supporting a tunnel top formwork; b: a vertical rod base is arranged on the ground foundation in the tunnel; c: connecting the upright of the bracket with a base, inserting a base screw rod into the lower end of the upright, providing supporting force for the upright by a base bearing ring, and then erecting a cross rod; d: sequentially upwards erecting supports; e: arranging a top support at the upper end of the topmost upright rod, and connecting the top support and the upright rod to ensure that the top plate is away from the template at the top of the tunnel by a certain distance; f: the steel pipe is installed, the steel pipe is preliminarily fixed on the template, then the jacking ring is lifted to enable the steel pipe to be clamped between the top plate and the template, and then the jacking ring is rotated downwards to be abutted against the upright rod.
Description
Technical Field
The invention relates to a method for building a formwork support, in particular to a method for building a tunnel construction formwork support.
Background
In the construction process of the tunnel, the walls on two sides of the tunnel are poured firstly, then a steel reinforcement framework is erected on the top of the tunnel, then a formwork is erected, and concrete is injected into the formwork to form the arched top surface of the tunnel.
In prior art, the support top can set up the double channel steel, and the channel-section steel is supported by the support and offsets as the fossil fragments with the lower extreme of template, and the direction that sets up of fossil fragments is the same with the direction that sets up in tunnel. To accommodate the arched top of the tunnel, the forms are also curved. After the concrete is injected into the formwork, the formwork is deformed under stress. Because the direction that sets up of fossil fragments is the same with the tunnel setting direction, and the template itself also has the radian for adapting to the tunnel top, consequently the template is buckled with the easy atress of fossil fragments both ends and is leaded to destroying. Consequently must set up fossil fragments at the both ends that template and fossil fragments parallel and middle part and be used for bearing the weight of the template, lead to setting up of support comparatively the process troublesome.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides the building method of the tunnel construction formwork support, which has the advantages that the support can be built more quickly, and the support of the support to the formwork is better.
The technical purpose of the invention is realized by the following technical scheme: a method for building a tunnel construction formwork support comprises the following steps:
a: prefabricating a steel pipe for supporting a tunnel top template, and bending the steel pipe into a radian which is the same as that of the tunnel top template;
b: the method comprises the following steps that a vertical rod base is arranged on a ground foundation in a tunnel, the base comprises a bottom plate and a base screw rod fixed with the bottom plate, and a base bearing ring is connected to the base screw rod in a threaded mode;
c: connecting the upright of the bracket with a base, inserting a base screw rod into the lower end of the upright, providing supporting force for the upright by a base bearing ring, and then erecting a cross rod;
d: sequentially upwards erecting supports;
e: the upper end of the topmost upright rod is provided with a top support, the top support comprises a top support screw rod, the top support screw rod comprises a top support bearing ring, the other end of the top support screw rod is fixedly provided with a top plate, two pairs of two sides of the top plate are provided with flanges, and the top plate is away from a template at the top of the tunnel by a certain distance after the top support is connected with the upright rod;
f: the steel pipe is installed, the steel pipe is preliminarily fixed on the template, then the lifting jacking enables the steel pipe to be clamped between the top plate and the template, and then the jacking bearing ring rotates downwards to be abutted to the vertical rod.
Through adopting above-mentioned technical scheme, the steel pipe after being crooked is used for bearing weight of, supporting the template as fossil fragments, because the steel pipe has the radian the same with the template, consequently the steel pipe can with the inseparable laminating of template to make the weight of template can be more even dispersion on the steel pipe. The steel pipe becomes to set up with tunnel advancing direction is perpendicular after buckling, therefore the both ends that template and tunnel advancing direction are parallel receive the difficult deformation of support of steel pipe. And the template is arch-shaped along the both ends of tunnel advancing direction, has better structural strength, consequently need not to set up steel pipe support template at the both ends of template along tunnel advancing direction. The steel pipes are only required to be arranged at trisection positions of the templates along the advancing direction of the tunnel, namely one template is only required to be supported by two steel pipes. Compared with the prior art, the number of steel pipes for supporting the template can be reduced, so that the support can be built more quickly.
The invention is further configured to: the support is built by utilizing a disc buckling type scaffold, a cross rod of the disc buckling type scaffold is provided with a connector, the cross rod connector is inserted into an insertion hole in a vertical rod disc, the position of the cross rod is adjusted to enable a first layer of cross rod to be located on the same plane, then a pin on the cross rod is buckled and knocked tightly, after the first layer of cross rod is built, the cross rod is adjusted through a base to be located on the same level, and then the next layer of building is carried out.
Through adopting above-mentioned technical scheme, adjust the horizontal position of horizontal pole through adjustable base for the bottom of mounting system has stronger stability can, and then makes the mounting system have better stability and structural strength.
The invention is further configured to: in the process of erecting the vertical rod, the diagonal draw bars are synchronously installed, or the diagonal draw bars are erected before concrete is poured at last, one end of each diagonal draw bar is fixed with the cross bar, and the other end of each diagonal draw bar is fixed with the vertical rod.
Through adopting above-mentioned technical scheme, set up oblique pull rod in the mounting system, let the one end and the pole setting of oblique pull rod fixed, the other end is fixed with the horizontal pole to further reinforcing the stability ability and the structural strength of mounting system.
The invention is further configured to: in the process of building the support, horizontal cross braces are arranged on the horizontal plane between the two layers of cross rods from bottom to top at intervals.
Through adopting above-mentioned technical scheme, horizontal bridging sets up forked supporting mechanism on the horizontally position promptly, and the member of bridging passes through the fastener and fixes with the horizontal pole of support or pole setting, can let the difficult deformation that takes place of support.
The invention is further configured to: and f, preliminarily fixing the steel pipe on the surface of the template by fixing an iron wire in advance, penetrating the iron wire out of the template and winding the iron wire to fix the iron wire on the template, and binding the steel pipe by using the iron wire to realize the preliminary fixation of the steel pipe on the template.
Through adopting above-mentioned technical scheme, utilize the iron wire board to prick the steel pipe for the preliminary fixing of steel pipe is on the template, thereby the later stage of being convenient for utilizes support and steel pipe to link to each other to support the steel pipe.
The invention is further configured to: both ends and the middle part of the steel pipe are supported by the jacking.
Through adopting above-mentioned technical scheme, the both ends and the middle part of steel pipe are all supported by the top support, let the weight of steel pipe transmission template and the concrete of filling in the template, and steel pipe three points support with the top support, consequently can be comparatively even transmit the support with weight.
The invention is further configured to: one end of each of the adjacent steel pipes, which is opposite to the other end, is clamped between the template and the top plate of the same pair of jacking supports.
Through adopting above-mentioned technical scheme, the steel pipe is all restricted between the turn-ups at roof both ends for there is the link up between the adjacent steel pipe, lets the steel pipe all can with the template contact with template load transmission and support system.
The invention is further configured to: an acute included angle is formed between the top plate of the jacking close to the two sides of the tunnel and the jacking screw rod.
Through adopting above-mentioned technical scheme, the acute angle contained angle adaptation template radian transform between roof and the top support lead screw for the top support lead screw still keeps vertical and the roof can be with the steel pipe centre gripping between template and roof.
The invention is further configured to: and when two layers of cross rods are built, the levelness of the cross rods and the verticality of the vertical rods are checked by using a total station.
By adopting the technical scheme, the levelness of the cross rod and the verticality of the vertical rod are checked at regular time in the building process of the support system, and the safety accident problem in the overall building process of the support is reduced.
In conclusion, the invention has the following beneficial effects:
1. one template is supported by the original three keels and is changed into the existing two bent steel pipe supports, so that the construction process of the support is quicker and quicker;
2. the levelness of the cross rod and the verticality of the vertical rod are checked at regular time in the building process of the support system, and the safety accident problem in the overall building process of the support is reduced.
Drawings
FIG. 1 is a partial structural schematic view of a stent system of the present invention;
FIG. 2 is an enlarged schematic view of the invention at A of FIG. 1;
fig. 3 is an enlarged schematic view of the structure at B in fig. 1 according to the present invention.
Reference numerals: 1. a template; 2. a steel pipe; 3. erecting a rod; 4. a base; 5. a base plate; 6. a base screw rod; 7. a base carrier ring; 8. a support; 9. a cross bar; 10. a joint; 11. a disc; 12. a diagonal member; 13. horizontal cross bracing; 14. jacking; 15. jacking the screw rod; 16. jacking the bearing ring; 17. a top plate; 18. and (4) iron wires.
Detailed Description
The invention is further described with reference to the accompanying drawings.
The embodiment discloses a method for building a formwork support for tunnel construction, which comprises the following steps as shown in fig. 1 and 2:
a: prefabricating a steel pipe 2 for supporting a tunnel top formwork 1, and bending the steel pipe 2 to form a radian which is the same as that of the tunnel top formwork 1;
b: the base 4 of the upright rods 3 is arranged on the ground in the tunnel in an equidistant array mode, the base 4 comprises a bottom plate 5 and a base screw rod 6 fixed with the bottom plate 5, and a base bearing ring 7 is connected to the base screw rod 6 in a threaded mode;
c: connecting the upright stanchion 3 of the bracket 8 with the base 4, so that the base screw rod 6 is inserted into the lower end of the tubular upright stanchion 3, the base bearing ring 7 provides supporting force for the upright stanchion 3, and then the cross rod 9 is erected;
the support 8 is built by using a coil buckle type scaffold, a cross rod 9 of the coil buckle type scaffold is provided with a joint 10, the joint 10 of the cross rod 9 is inserted into an insertion hole on a disc 11 of the vertical rod 3, and then the cross rod 9 and the vertical rod 3 are connected together. Adjusting the position of the cross rod 9 to enable the cross rod 9 of the first layer to be positioned on the same plane, then buckling and tightly knocking down a pin on the cross rod 9, adjusting the cross rod 9 to be positioned on the same level through the base 4 after the cross rod 9 of the first layer is erected, and then erecting the next layer;
d: sequentially and upwards erecting supports 8;
in the process of erecting the upright stanchion 3, the diagonal draw bars 12 are synchronously installed, or the diagonal draw bars 12 are erected before concrete is poured at last, one end of each diagonal draw bar 12 is fixed with the cross bar 9, and the other end of each diagonal draw bar 12 is fixed with the upright stanchion 3; the arrangement of the diagonal draw bars 12 enhances the stability and the structural strength of the bracket 8 system;
in addition, in the process of building the support 8, horizontal cross braces 13 are arranged on the horizontal plane between the two layers of cross rods 9 at intervals from bottom to top, rod pieces of the cross braces are fixed with the cross rods 9 or the vertical rods 3 of the support 8 through fasteners, so that a horizontal reinforcing mechanism is formed on the horizontal plane of the support 8, and the support 8 is not easy to deform due to the horizontal cross braces 13;
moreover, every two layers of cross rods 9 are built, the levelness of the cross rods 9 and the verticality of the vertical rods 3 are checked by using a total station, so that the system structure of the support 8 is adjusted at intervals, and the problem of safety accidents in the overall building process of the support 8 is reduced;
e: as shown in figures 1 and 3 of the drawings,
a top support 14 is arranged at the upper end of the topmost upright 3, the top support 14 comprises a top support screw rod 15, the top support screw rod 15 comprises a top support bearing ring 16, a top plate 17 is fixed at the other end of the top support screw rod 15, flanges are arranged on two pairs of two sides of the top plate 17 and used for limiting the steel pipe 2, and the top plate 17 is away from a template 1 at the top of the tunnel by a certain distance after the top support 14 is connected with the upright 3;
f: installing a steel pipe 2, preliminarily fixing the steel pipe 2 on the template 1, preliminarily fixing an iron wire 18 on the surface of the template 1, penetrating the iron wire 18 out of the template 1 and winding to fix the iron wire on the template 1, and binding the steel pipe 2 by using the iron wire 18 to realize preliminary fixing of the steel pipe 2 on the template 1;
after the steel pipes 2 are preliminarily fixed, the jacking 14 is lifted to enable the steel pipes 2 to be clamped between the top plate 17 and the template 1, the steel pipes 2 are located between flanges at two ends of the top plate 17, then the jacking bearing ring 16 is rotated downwards to be abutted against the upright rods 3, the jacking bearing ring 16 can bear the template 1, and each template 1 can be supported by two steel pipes 2;
as shown in fig. 1 and 3, in the bracket 8 system, both ends and the middle part of the steel pipe 2 are supported by the jacking 14, and the opposite ends of the adjacent steel pipes 2 are clamped between the formwork 1 and the top plate 17 of the same sub-jacking 14, so that the formwork 1 and the concrete filled in the formwork 1 can uniformly transmit the load to the bracket 8.
In addition, in order to better support the steel pipe 2 by the jacking 14, the acute angle included angle between the top plate 17 and the jacking screw rod 15 adapts to the radian change of the template 1, and the acute angle included angle between the top plate 17 and the jacking screw rod 15 which are closer to the two sides of the tunnel is smaller, so that the jacking screw rod 15 still keeps vertical, and the top plate 17 can clamp the steel pipe 2 between the template 1 and the top plate 17.
The directions given in the present embodiment are merely for convenience of describing positional relationships between the respective members and the relationship of fitting with each other. The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.
Claims (7)
1. A building method of a tunnel construction formwork support is characterized by comprising the following steps: the method comprises the following steps:
a: prefabricating a steel pipe (2) for supporting a tunnel top formwork (1), and bending the steel pipe (2) to form a radian which is the same as that of the tunnel top formwork (1);
b: a base (4) of the upright rod (3) is arranged on the ground foundation in the tunnel, the base (4) comprises a bottom plate (5) and a base screw rod (6) fixed with the bottom plate (5), and a base bearing ring (7) is connected to the base screw rod (6) in a threaded manner;
c: connecting the upright rod (3) of the support (8) with the base (4), inserting the base screw rod (6) into the lower end of the upright rod (3), providing a supporting force for the upright rod (3) by the base bearing ring (7), and then erecting a cross rod (9);
d: sequentially and upwards erecting supports (8);
e: the upper end of the topmost upright (3) is provided with a top support (14), the top support (14) comprises a top support screw rod (15), the top support screw rod (15) comprises a top support bearing ring (16), the other end of the top support screw rod (15) is fixed with a top plate (17), two pairs of two sides on the top plate (17) are provided with flanges, and the top plate (17) is away from the template (1) at the top of the tunnel by a certain distance after the top support (14) is connected with the upright (3);
f: installing a steel pipe (2), preliminarily fixing the steel pipe (2) on a template (1), then lifting a top support (14) to clamp the steel pipe (2) between a top plate (17) and the template (1), and then rotating a top support bearing ring (16) downwards to abut against an upright rod (3);
in the step f, an iron wire (18) is fixed on the surface of the template (1) in advance in the primary fixing of the steel pipe (2), the iron wire (18) penetrates out of the template (1) and is wound to be fixed on the template (1), and the steel pipe (2) is bound by the iron wire (18) to realize the primary fixing of the steel pipe (2) on the template (1);
an acute included angle is formed between a top plate (17) of the jacking supports (14) close to the two sides of the tunnel and the jacking screw rod (15).
2. The method for constructing a formwork support for tunnel construction according to claim 1, wherein: the support (8) are built by utilizing the disc buckling type scaffold, a cross rod (9) of the disc buckling type scaffold is provided with a connector (10), the connector (10) of the cross rod (9) is inserted into an insertion hole in a disc (11) of the vertical rod (3), the position of the cross rod (9) is adjusted, the first layer of the cross rod (9) is located on the same plane, then a pin on the cross rod (9) is buckled and knocked tightly, after the first layer of the cross rod (9) is erected, the base (4) is used for adjusting, the cross rod (9) is located on the same level, and then the next layer of erection is carried out.
3. The method for constructing a formwork support for tunnel construction according to claim 2, wherein: in the process of erecting the vertical rod (3), an inclined pull rod (12) is synchronously installed, or the inclined pull rod (12) is erected before concrete is poured at last, one end of the inclined pull rod (12) is fixed with the cross rod (9), and the other end of the inclined pull rod is fixed with the vertical rod (3).
4. The method for constructing a formwork support for tunnel construction according to claim 3, wherein: in the process of building the support (8), horizontal cross braces (13) are arranged on the horizontal plane between the two layers of cross rods (9) at intervals from bottom to top.
5. The method for constructing a formwork support for tunnel construction according to claim 1, wherein: both ends and the middle part of the steel pipe (2) are supported by the jacking (14).
6. The method for constructing a formwork support for tunnel construction according to claim 4, wherein: one end of each of the adjacent steel pipes (2) which faces each other is clamped between the formwork (1) and the top plate (17) of the same sub-jacking (14).
7. The method for constructing a formwork support for tunnel construction according to claim 1, wherein: and when two layers of cross rods (9) are built, the levelness of the cross rods (9) and the verticality of the vertical rods (3) are checked by using a total station.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811237778.9A CN109538242B (en) | 2018-10-23 | 2018-10-23 | Building method of tunnel construction formwork support |
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| CN201811237778.9A CN109538242B (en) | 2018-10-23 | 2018-10-23 | Building method of tunnel construction formwork support |
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| CN109538242A CN109538242A (en) | 2019-03-29 |
| CN109538242B true CN109538242B (en) | 2020-09-29 |
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| CN110130477B (en) * | 2019-04-16 | 2020-12-22 | 上海福铁龙住宅工业发展有限公司 | House construction method |
| CN110424712B (en) * | 2019-08-07 | 2020-08-18 | 江西一科模板脚手架工程有限公司 | Portable construction is with scaffold puts up auxiliary device |
| CN110645022A (en) * | 2019-10-29 | 2020-01-03 | 中建八局轨道交通建设有限公司 | Self-anchored formwork support system for connecting channel and construction method |
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| CN109538242A (en) | 2019-03-29 |
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