CN108952769B - Maintenance method for tunnel secondary lining formwork trolley - Google Patents
Maintenance method for tunnel secondary lining formwork trolley Download PDFInfo
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- CN108952769B CN108952769B CN201811007453.1A CN201811007453A CN108952769B CN 108952769 B CN108952769 B CN 108952769B CN 201811007453 A CN201811007453 A CN 201811007453A CN 108952769 B CN108952769 B CN 108952769B
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- template
- portal
- secondary lining
- tunnel
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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
- E21D11/105—Transport or application of concrete specially adapted for the lining of tunnels or galleries ; Backfilling the space between main building element and the surrounding rock, e.g. with concrete
Abstract
The invention discloses a maintenance method of a tunnel secondary lining form trolley, belongs to the field of maintenance of construction equipment, and aims to shorten the maintenance time of the secondary lining form trolley and improve the maintenance efficiency of the secondary lining form trolley. The method comprises the following steps: step one, supporting the bottom of the angle template on an inverted arch for backfilling; temporarily fixing the hinged positions of the template units at two ends of the tunnel secondary lining trolley; step two, the connection between the template unit and the portal is released; step three, moving the portal out of the template unit along the longitudinal direction of the tunnel; fourthly, maintaining the portal; moving the maintained portal frame to the original position; step six, connecting the portal frame with the template unit; and step seven, releasing the temporary fixation. According to the invention, the template unit is separated from the portal frame, and the portal frame is moved out independently for portal frame repair, so that the traction is more convenient and labor-saving; inside alright carry out the portal and restore in the tunnel, finally shortened maintenance duration, improved maintenance efficiency.
Description
Technical Field
The invention belongs to the field of maintenance of construction equipment, and particularly relates to a maintenance method of a tunnel secondary lining formwork trolley.
Background
The secondary lining formwork trolley is widely used in tunnel secondary lining construction and generally comprises the following parts: the template comprises an arc-shaped template unit, a portal positioned on the inner side of the template unit and a plurality of hydraulic cylinders for connecting the portal and the supporting template unit. The formwork unit generally includes a top formwork located at the top of the arch in its circumferential direction, side formworks located at both sides, and corner formworks located at the bottoms of both sides; one end of the side template is hinged with one end of the corresponding top template, and the other end of the side template is hinged with one end of the corresponding angle template; the portal comprises a cross beam at the top and supporting legs at two sides of the bottom; the top ends of the supporting legs are connected with the cross beam.
During secondary lining pours, secondary lining template trolley causes the inboard removal of taking place in portal landing leg bottom because of portal landing leg bottom sprag insecure to cause portal crossbeam distortion, lead to the unable continuation of platform truck to use. Therefore, the trolley portal beam must be replaced and maintained, and the supporting legs must be corrected. At present, the commonly adopted operation mode is as follows: and pulling the secondary lining template trolley to the outside of the tunnel by using a loader to integrally remove the secondary lining template trolley, guiding a professional to cut and correct the beam on site, repairing and welding the corrected beam with a steel plate, and finally pulling the secondary lining template trolley to the original position after the assembly is finished. Although the maintenance method solves the problem of beam deformation, the maintenance time is long, and the quick repair of the secondary lining formwork trolley is not facilitated.
Disclosure of Invention
The invention aims to provide a maintenance method of a tunnel secondary lining form trolley, which is used for shortening the maintenance time of the secondary lining form trolley and improving the maintenance efficiency of the secondary lining form trolley.
The technical scheme adopted by the invention is as follows: the maintenance method of the tunnel secondary lining template trolley comprises the following steps that the tunnel secondary lining template trolley comprises an arc template unit and a portal which is positioned on the inner side of the template unit and used for supporting the template unit; the formwork unit comprises a top formwork positioned at the top of the arch, side formworks positioned at two sides and corner formworks positioned at the bottoms of the two sides along the circumferential direction of the formwork unit; one end of the side template is hinged with one end of the corresponding top template, and the other end of the side template is hinged with one end of the corresponding angle template; the portal comprises a cross beam at the top and supporting legs at two sides of the bottom; the top ends of the supporting legs are connected with the cross beam; comprises the following steps which are carried out in sequence:
filling a cushion block between the bottom of the angle template and the top surface of the inverted arch backfill concrete, so that the bottom of the angle template is supported on the top surface of the inverted arch backfill concrete; temporarily fixing the hinged parts of the corner templates and the side templates and the hinged parts of the side templates and the top template at two ends of the tunnel secondary lining template trolley;
step two, the connection between the template unit and the portal is released;
moving the portal out of the template unit along the longitudinal direction of the tunnel to completely separate the portal from the template unit;
fourthly, maintaining the portal;
moving the maintained portal frame to the original position;
step six, connecting the portal frame with the template unit;
and seventhly, releasing the temporary fixation between the corner template and the side template and between the side template and the hinged part of the top template.
Further, in the first step, a connecting steel plate is arranged at the hinged position and is welded and connected with the templates on two sides of the splicing position to achieve temporary fixation.
Further, after the third step and before the fourth step, an inclined strut is arranged, one end of the inclined strut is supported on the top surface of the inverted arch backfill concrete, and the other end of the inclined strut is supported on the inner side of the template unit.
Further, the inclined strut is supported on the side formwork.
And further, in the fourth step, the supporting legs of the portal frame are corrected before the portal frame is moved out of place and maintained.
Furthermore, a chain block is adopted to correct the supporting legs of the portal frame.
The invention has the beneficial effects that: according to the invention, the template unit is separated from the portal frame, and the portal frame is moved out independently for portal frame repair, so that compared with the integral moving tunnel secondary lining template trolley, firstly, the traction is more convenient and labor-saving, and manpower and traction equipment are saved; secondly, the height and the width of the tunnel occupied by the portal frame are smaller, and after the portal frame is moved out independently, enough space is easier to find in the tunnel for portal frame repairing operation, so that the investment of manpower and traction equipment is favorably shortened, and the maintenance period is shortened; finally, when the portal is moved out, the template unit is kept in the original position, so that an accurate position is provided for the repaired portal, the adjusting time of portal resetting is shortened, and the maintenance efficiency is improved.
Drawings
FIG. 1 is a schematic structural view of a tunnel secondary lining form trolley;
fig. 2 is a schematic view of the template unit of fig. 1 after the removal of the gantry.
In the figure, a template unit 1, a top template 11, side templates 12, corner templates 13, a portal 2, a cross beam 21, a support leg 22, a connecting steel plate 3 and an inclined strut 4.
Detailed Description
The invention is further described below with reference to the following figures and examples:
a maintenance method of a tunnel secondary lining template trolley comprises the steps that as shown in figure 1, the tunnel secondary lining template trolley comprises an arc template unit 1 and a portal 2 which is positioned on the inner side of the template unit 1 and used for supporting the template unit 1; the formwork unit 1 comprises a top formwork 11 positioned at the top of the arch, side formworks 12 positioned at two sides and corner formworks 13 positioned at the bottoms of the two sides along the circumferential direction of the formwork unit; one end of each side template 12 is hinged with one end of the corresponding top template 11, and the other end of each side template is hinged with one end of the corresponding corner template 13; the gantry 2 comprises a beam 21 at the top and legs 22 at two sides of the bottom; the top ends of the supporting legs 22 are connected with the cross beam 21; comprises the following steps which are carried out in sequence:
firstly, stuffing a cushion block between the bottom of the angle template 13 and the top surface of the inverted arch backfill concrete, so that the bottom of the angle template 13 is supported on the top surface of the inverted arch backfill concrete; temporarily fixing the hinged parts of the corner formworks 13 and the side formworks 12 and the hinged parts of the side formworks 12 and the top formworks 11 at two ends of the tunnel secondary lining formwork trolley;
step two, the connection between the template unit 1 and the door frame 2 is released;
thirdly, moving the portal 2 out of the template unit 1 along the longitudinal direction of the tunnel to completely separate the portal 2 from the template unit 1;
fourthly, maintaining the portal frame 2;
fifthly, moving the maintained portal 2 to the original position;
step six, connecting the portal 2 with the template unit 1;
and seventhly, releasing the temporary fixation between the corner template 13 and the side template 12 and between the side template 12 and the hinged part of the top template 11.
According to the invention, the template unit 1 is separated from the portal 2, and the portal 2 is independently moved out to repair the portal 2, so that compared with an integrally moving tunnel secondary lining template trolley, firstly, the traction is more convenient and labor-saving, and manpower and traction equipment are saved; secondly, the height and the width of the tunnel occupied by the portal 2 are smaller, and after the portal 2 is moved out independently, enough space is easier to find in the tunnel for the portal 2 to repair, so that the investment of manpower and traction equipment is favorably shortened, and the maintenance period is shortened; and finally, when the portal 2 is moved out, the template unit 1 is left at the original position, so that an accurate position is provided for the repaired portal 2, and the reset adjustment time of the portal 2 is shortened.
In the first step, a cushion block is stuffed between the bottom of the angle form 13 and the top surface of the inverted arch backfill concrete, the purpose is to make the angle form 13 self-support on the top surface of the inverted arch backfill concrete, the cushion block can be a steel plate, a wood wedge, or a combination of the steel plate and the wood wedge, and the concrete interval between the angle form 13 and the top surface of the inverted arch backfill concrete is determined according to the requirement that the angle form 13 is firmly supported on the top surface of the inverted arch backfill concrete, and no displacement is generated between the angle form 13 and the top surface of the inverted arch backfill concrete.
When the tunnel secondary lining formwork trolley is used, the side formworks 12 and the top formwork 11 are hinged with each other, and the side formworks 12 and the corner formworks 13 are hinged with each other, so that the formwork unit 1 is prevented from collapsing due to relative displacement at the hinged points, therefore, in the first step, the hinged parts of the corner formworks 13 and the side formworks 12 and the hinged parts of the side formworks 12 and the top formwork 11 are temporarily fixed, so that the hinged formworks 13 and the side formworks 12 cannot rotate relatively, and the side formworks 12 and the top formwork 11 cannot rotate relatively.
In the second step, the connection between the corner mold plates 13, the side mold plates 12, and the top mold plate 11 and the door frame 2 is released. The components of the template unit 1 are usually connected with the gantry 2 by hydraulic cylinders, and during specific operation, connecting bolts between the hydraulic cylinders and the gantry 2 are loosened to enable the hydraulic cylinders to be kept on the template unit 1.
The hinged parts of the corner templates 13 and the side templates 12 and the hinged parts of the side templates 12 and the top templates 11 are temporarily fixed before the connection between the corner templates 13, the side templates 12 and the top templates 11 and the portal 2 is released, so that when the corner templates are temporarily fixed, the portal 2 still plays a supporting role for the template unit 1, the template unit 1 can be effectively prevented from collapsing due to vibration and other reasons, and the stability of reinforcing the template unit 1 is improved.
In the third step, after the portal 1 moves out of the template unit 1, because the space occupied by the portal 1 is smaller compared with the whole trolley, enough space is reserved in the tunnel for overhauling the portal 1, so the portal 1 does not need to move out of the tunnel and can be overhauled at a proper position in the tunnel as required.
Two clamping sleeves can be sleeved at the hinged part to achieve temporary fixing, but the clamping sleeves are inconvenient to install, preferably, as shown in fig. 2, in the second step, a connecting steel plate 3 is arranged at the hinged part, and the connecting steel plate 3 is in welded connection with the templates on two sides of the hinged part to achieve temporary fixing.
Temporary fixation is realized through the welding connection of the connecting steel plate 3 and the templates at two sides of the hinged position, and the operation is simple and easy. When the angle formworks 13 are hinged with the side formworks 12, the formworks on two sides of the hinged position are the corresponding angle formworks 13 and the corresponding side formworks 12 respectively. When the formworks are located at the hinged parts of the side formworks 12 and the top formwork 11, the formworks at the two sides of the hinged parts are the corresponding side formworks 12 and the top formwork 11 respectively.
In order to enhance protection of the formwork unit 1 and avoid temporary fixing failure or integral deflection of the formwork unit 1 due to vibration and the like, preferably, after the third step and before the fourth step, as shown in fig. 2, a diagonal brace 4 is arranged, one end of the diagonal brace 4 is supported on the top surface of the inverted arch backfill concrete, and the other end of the diagonal brace is supported on the inner side of the formwork unit 1. The inside of the template unit 1 refers to the area enclosed by the arch surrounded by the template unit 1.
The braces 4 may be supported from the angle forms 13, preferably the braces 4 are supported from the sideforms 12. For the stability of the inclined strut 4, the inclined strut 4 is preferably installed at an angle of 45 degrees to the horizontal plane.
In step four, the legs 22 of the gantry 2 are straightened before the gantry 2 is moved out of position for maintenance.
Preferably, the legs 22 of the gantry 2 are straightened by chain blocks.
One end of the chain block is fixed on the lining on the two sides of the tunnel, the other end of the chain block acts on the supporting leg 22, the supporting leg 22 is pulled open towards the two sides, and the adjustment is more convenient and labor-saving.
Claims (5)
1. The maintenance method of the tunnel secondary lining template trolley comprises the steps that the tunnel secondary lining template trolley comprises an arc template unit (1) and a portal (2) which is located on the inner side of the template unit (1) and used for supporting the template unit (1); the formwork unit (1) comprises a top formwork (11) positioned at the top of the arch, side formworks (12) positioned at two sides and corner formworks (13) positioned at the bottoms of the two sides along the circumferential direction of the formwork unit; one end of each side template (12) is hinged with one end of the corresponding top template (11), and the other end of each side template is hinged with one end of the corresponding corner template (13); the gantry (2) comprises a cross beam (21) at the top and supporting legs (22) at two sides of the bottom; the top ends of the supporting legs (22) are connected with the cross beam (21); the method is characterized by comprising the following steps of:
filling a cushion block between the bottom of the angle template (13) and the top surface of the inverted arch backfill concrete, and supporting the bottom of the angle template (13) on the top surface of the inverted arch backfill concrete; temporarily fixing the hinged positions of the corner formworks (13) and the side formworks (12) and the hinged positions of the side formworks (12) and the top formworks (11) at two ends of the tunnel secondary lining formwork trolley;
secondly, the connection between the template unit (1) and the portal (2) is released;
thirdly, moving the portal frame (2) out of the template unit (1) along the longitudinal direction of the tunnel, so that the portal frame (2) is completely separated from the template unit (1);
fourthly, maintaining the portal frame (2);
fifthly, moving the maintained portal frame (2) to the original position;
step six, connecting the portal (2) with the template unit (1);
seventhly, releasing the temporary fixation between the corner template (13) and the side template (12) and the hinged positions of the side template (12) and the top template (11);
in the first step, a connecting steel plate (3) is arranged at the hinged position, and the connecting steel plate (3) is welded and connected with the templates on two sides of the splicing position to realize temporary fixation.
2. The tunnel secondary lining form jumbo maintenance method of claim 1, characterized in that after step three, and before step four, a diagonal brace (4) is provided, said diagonal brace (4) being supported at one end on the top face of the inverted arch backfill concrete and at the other end on the inside of the form unit.
3. The method for repairing a secondary lining form jumbo of a tunnel according to claim 2, characterized in that the braces (4) are supported to the sideforms (12).
4. A method for repairing a secondary lining of a tunnel according to any of claims 1 to 3, characterised in that in step four, the legs (22) of the gantry (2) are straightened out before the gantry (2) is moved out of position for repair.
5. The maintenance method of the tunnel secondary lining form jumbo as claimed in claim 4, characterized in that the legs (22) of the gantry (2) are straightened with chain blocks.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811007453.1A CN108952769B (en) | 2018-08-31 | 2018-08-31 | Maintenance method for tunnel secondary lining formwork trolley |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811007453.1A CN108952769B (en) | 2018-08-31 | 2018-08-31 | Maintenance method for tunnel secondary lining formwork trolley |
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| CN108952769B true CN108952769B (en) | 2020-02-07 |
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| CN110273695A (en) * | 2019-07-13 | 2019-09-24 | 中国三冶集团有限公司 | A kind of Tunnel Second Lining formwork jumbo and its stage molding pouring procedure |
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| JP4522596B2 (en) * | 2001-02-07 | 2010-08-11 | 岐阜工業株式会社 | Method and apparatus for placing concrete in tunnel widening work |
| JP3891210B1 (en) * | 2005-09-27 | 2007-03-14 | 株式会社エムケーエンジニアリング | Inner formwork structure |
| CN101824994A (en) * | 2010-04-27 | 2010-09-08 | 池州恒毅设备制造有限公司 | Concrete lining steel formwork jumbo |
| KR101202784B1 (en) * | 2010-05-31 | 2012-11-19 | 선산철강공업(주) | A Travelling Steel Form |
| CN204419200U (en) * | 2014-11-14 | 2015-06-24 | 中铁二十一局集团第三工程有限公司 | One kind of multiple bore tunnel hydraulic lining trolleys |
| CN207177929U (en) * | 2017-09-30 | 2018-04-03 | 中铁十二局集团有限公司 | Arc adhesion type two serves as a contrast concrete and pours elephant trunk by window |
| CN108035737B (en) * | 2017-12-07 | 2019-04-23 | 中国十九冶集团有限公司 | Tunnel Second Lining formwork jumbo seals leg structure and its installation method |
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