CN111366066A - Strain monitoring method of variable-section adjustable lining trolley - Google Patents
Strain monitoring method of variable-section adjustable lining trolley Download PDFInfo
- Publication number
- CN111366066A CN111366066A CN202010247129.8A CN202010247129A CN111366066A CN 111366066 A CN111366066 A CN 111366066A CN 202010247129 A CN202010247129 A CN 202010247129A CN 111366066 A CN111366066 A CN 111366066A
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- top die
- strain
- variable
- steel bar
- lining trolley
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- 230000000875 corresponding Effects 0.000 claims abstract description 43
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 24
- 239000010959 steel Substances 0.000 claims abstract description 24
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims abstract description 17
- 230000001502 supplementation Effects 0.000 claims description 27
- 230000000576 supplementary Effects 0.000 claims description 26
- 230000003028 elevating Effects 0.000 claims description 10
- 238000005266 casting Methods 0.000 claims description 8
- 239000011888 foil Substances 0.000 claims description 7
- 230000003247 decreasing Effects 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract description 23
- 238000009415 formwork Methods 0.000 description 10
- 230000004048 modification Effects 0.000 description 3
- 238000006011 modification reaction Methods 0.000 description 3
- 230000003044 adaptive Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003014 reinforcing Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic means
- G01B7/16—Measuring arrangements characterised by the use of electric or magnetic means for measuring the deformation in a solid, e.g. by resistance strain gauge
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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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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
- E21F17/18—Special adaptations of signalling or alarm devices
Abstract
A strain monitoring method of a variable-section adjustable lining trolley comprises the following steps: s1: assembling from bottom to top to form a variable-section adjustable lining trolley; s2: strain gauges are arranged on the longitudinal and transverse moving lifting mechanism, the middle support column, the transverse moving frame, the side die unit and the top die unit, and reinforcing steel bar meters are arranged on the side die unit and the top die unit; s3: setting monitoring frequencies of each strain gauge and each reinforcing steel bar meter; s4: setting the early warning value of the strain gauge to be 700 mu epsilon and setting the early warning value of the steel bar meter to be 140 MPa; 5: pouring from bottom to top and carrying out real-time strain monitoring, and when the load borne by the strain gauge and/or the steel bar meter exceeds a corresponding early warning value, sending early warning information for stopping pouring; and when the loads borne by the strain gauge and the steel bar meter are within corresponding early warning values, continuously pouring until pouring is finished. The method has the advantages of being convenient to operate, capable of meeting the construction requirement of continuous sections and capable of improving the construction efficiency and the construction safety.
Description
Technical Field
The invention mainly relates to a tunnel transition section lining construction technology, in particular to a strain monitoring method of a variable-section adjustable lining trolley.
Background
A tunnel transition section lining trolley is special equipment for tunnel construction and is used for lining construction of a tunnel section.
At present, the existing tunnel transition section lining trolley mainly comprises a framework unit, an arc-shaped template unit, a connecting template unit and a supporting unit, wherein the arc-shaped template unit consists of a top template, two side templates and two bottom templates. The supporting unit can push each side template to drive the corresponding bottom template to swing outwards, so that the outer contour of the template unit is expanded outwards, the requirement for tunnels with different sizes and sections is met, and the construction cost is reduced.
Because the arch part of the existing tunnel transition section lining trolley can not be adjusted, when a tunnel has a plurality of continuous sections, the trolley can not meet the construction requirements, and when the plurality of continuous sections are formed, the lining trolley can not carry out effective strain monitoring, thereby seriously influencing the construction quality.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide the strain monitoring method of the variable-section adjustable lining trolley, which is convenient to operate, can meet the construction requirement of continuous sections, can improve the construction efficiency and the construction quality and can improve the construction safety.
In order to solve the technical problems, the invention adopts the following technical scheme:
a strain monitoring method of a variable-section adjustable lining trolley comprises a plurality of top mould units, a pair of side mould units, a pair of top mould supporting beams, a pair of leveling mechanisms, a transverse moving frame, a middle supporting column, a pair of longitudinal and transverse moving lifting mechanisms and a pair of transverse adjusting oil cylinders; the monitoring method comprises the following steps:
s1: assembling the longitudinal and transverse moving lifting mechanism, the middle support column, the transverse adjusting oil cylinder, the transverse moving frame, the transverse adjusting mechanism, the top die support beam, the side die unit and the top die unit from bottom to top to form a variable-section adjustable lining trolley;
s2: strain gauges are arranged on the longitudinal and transverse moving lifting mechanism, the middle support column, the transverse moving frame, the side die unit and the top die unit, and reinforcing steel bar meters are arranged on the side die unit and the top die unit;
s3: setting monitoring frequencies of each strain gauge and each reinforcing steel bar meter;
s4: setting the early warning value of the strain gauge to be 700 mu epsilon and setting the early warning value of the steel bar meter to be 140 MPa;
s5: pouring from bottom to top and carrying out real-time strain monitoring, and when the load borne by the strain gauge and/or the steel bar meter exceeds a corresponding early warning value, sending early warning information for stopping pouring; and when the loads borne by the strain gauge and the steel bar meter are within corresponding early warning values, continuously pouring until pouring is finished.
As a further improvement of the above technical solution:
when the transverse adjusting oil cylinder drives the pair of longitudinal transverse moving lifting mechanisms to drive the top die supporting beams to move towards two sides through the transverse moving frame and/or when the transverse adjusting mechanism drives the top die units and the top die supporting beams to move towards two sides, the two top die units at the arch top are disconnected with each other, so that a supplementary space is formed between the two top die supporting beams and between the two top die units positioned at the arch top, then the top die supplementary units and the top die supplementary supporting frames are installed into the corresponding supplementary space and form supplementary connection with the corresponding top die units and the top die supporting beams to form a new arch top, and strain gauges are arranged on the new arch top for monitoring.
In step S3, it is ensured that the monitoring frequency thereof is gradually decreased as the casting proceeds.
And setting the monitoring frequency of each strain gauge to be 3-5 min once and setting the monitoring frequency of each reinforcing steel bar meter to be 15-60 min once within the casting height range of 0-11 m.
Within the casting height range of 11m to 14m, the monitoring frequency of each strain gauge is set to be 12min to 15min once, and the monitoring frequency of each reinforcing steel bar meter is set to be 50min to 60min once.
And when the pouring is finished, setting the monitoring frequency of each strain gauge to be 15-20 min once, and setting the monitoring frequency of each reinforcing steel bar meter to be 50-60 min once.
And in the mold removal stage, setting the monitoring frequency of each strain gauge to be 25min-30min once.
The top die unit comprises a top die plate and a top die supporting piece, the top die plate is connected with the top die supporting beam through the top die supporting piece, and the corresponding strain gauge and the corresponding steel bar meter are arranged on the top die supporting piece, wherein the steel bar meter is close to the center line of the top of the arch in the radial direction, and the strain gauge is far away from the center line of the top of the arch in the radial direction.
The side form unit comprises a side form plate and a side form supporting piece, the side form plate is hinged to the top form plate, the side form plate is connected with the side of the longitudinal and transverse shifting lifting mechanism through the side form supporting piece, the corresponding strain gauge and the corresponding steel bar gauge are arranged on the side form supporting piece, and the steel bar gauge is close to the arch top and the strain gauge is far away from the arch top on the same arc line.
The top die supplementing unit comprises a top die supplementing plate and a supplementing supporting rod, the top die supplementing plate is arranged in the supplementing space and is hinged with the top die plate, the supplementing supporting rod is connected with the top die supplementing plate and the top die supplementing supporting frame, and the corresponding strain gauge is arranged on the supplementing supporting rod.
The transverse moving frame comprises an inner fixed beam and a pair of outer transverse moving sleeve frames, the inner fixed beam is fixedly connected with the top of the middle support column, the outer transverse moving sleeve frames are slidably arranged on the inner fixed beam, a pair of longitudinal and transverse moving lifting mechanisms are fixedly connected with the outer transverse moving sleeve frames on the corresponding sides, a pair of leveling mechanisms are slidably connected with the outer transverse moving sleeve frames on the corresponding sides, and corresponding strain gauges are arranged on the inner fixed beam.
The longitudinal and transverse moving lifting mechanism comprises a longitudinal and transverse moving frame and a lifting oil cylinder, the outer transverse moving sleeve frame is fixedly connected with the longitudinal and transverse moving frame, the transverse adjusting oil cylinder is connected with the longitudinal and transverse moving frame on the corresponding side, the lifting oil cylinder is installed on the longitudinal and transverse moving frame, longitudinal moving rollers are installed at the bottom of the lifting oil cylinder, the transverse moving rollers are arranged at the bottom of the longitudinal and transverse moving frame, and corresponding strain gauges are arranged on the longitudinal and transverse moving frame.
Compared with the prior art, the invention has the advantages that:
compared with the traditional method, the strain monitoring method of the variable-section adjustable lining trolley is provided. This lining cutting platform truck move about freely and quickly elevating system and top mould unit all can realize transversely widening the removal, realized promptly moving about freely and quickly elevating system and arch portion and adjusted and widen the function, through moving about freely and quickly elevating system, the intermediate strut post, the sideslip frame, set up the foil gage on side forms unit and the top mould unit, set up the rebar meter on side forms unit and top mould unit and realize real-time strain monitoring, the early warning of meeting an emergency to whole lining cutting platform truck has been realized, the steam generator is simple in structure, high durability and convenient operation, can satisfy continuous sectional construction demand, greatly reduced construction cost, construction efficiency is improved, the security of construction is improved.
Drawings
FIG. 1 is a schematic structural view of a variable-section adjustable lining trolley according to the present invention.
Fig. 2 is an enlarged schematic view of a portion a of fig. 1.
Fig. 3 is an enlarged schematic view of fig. 1 at B.
Fig. 4 is an enlarged schematic view of fig. 1 at C.
FIG. 5 is a schematic structural view showing an adjustment state of the variable-section adjustable lining trolley according to the present invention.
FIG. 6 is a schematic structural view of the adjustable lining trolley with variable cross-section according to the present invention after adjustment and supplement.
Fig. 7 is an enlarged schematic view of fig. 6 at D.
FIG. 8 is a flow chart of a method of strain monitoring of the variable profile adjustable lining trolley of the present invention.
The reference numerals in the figures denote:
1. a top die unit; 11. a top template; 12. a top die support; 121. a vertical support bar; 1211. a vertical screw rod; 1212. a vertical threaded rod; 122. an oblique supporting rod; 1221. an oblique screw rod; 1222. an oblique threaded sleeve rod; 13. a transverse pulling member; 131. a transverse screw rod; 132. a transverse threaded rod; 14. a locking mechanism; 141. a connecting seat; 142. a locking plate; 2. a side mold unit; 21. a side template; 22. a side form support; 221. a side form support bar; 2211. a side form threaded sleeve rod; 2212. a side form screw rod; 222. side form anchor rods; 3. a top form support beam; 4. a leveling mechanism; 41. a translation oil cylinder; 42. a support table; 43. a pinch roller; 5. a top mold supplement unit; 51. a top mold supplement plate; 52. supplementing the supporting rod; 521. a vertical supplementary screw rod; 522. vertically supplementing a threaded sleeve rod; 6. supplementing a support frame for the top die; 61. supplementing the beam; 62. a support beam; 63. erecting a beam; 7. transversely moving the frame; 71. an inner fixed beam; 72. the jacket frame is transversely moved; 73. a lengthening block; 8. a middle support column; 9. a vertically and horizontally moving and lifting mechanism; 91. a vertically and horizontally moving frame; 92. a lift cylinder; 93. longitudinally moving the roller; 94. transversely moving the roller; 10. and a transverse adjusting oil cylinder.
Detailed Description
The invention will be described in further detail below with reference to the drawings and specific examples.
Fig. 1 to 8 show an embodiment of a strain monitoring method of a variable-section adjustable lining trolley according to the present invention, the lining trolley including a plurality of top form units 1, a pair of side form units 2, a pair of top form support beams 3, a pair of leveling mechanisms 4, a traverse carriage 7, a middle support column 8, a pair of traverse elevating mechanisms 9, and a pair of traverse cylinders 10; the monitoring method comprises the following steps:
s1: assembling a longitudinal and transverse moving lifting mechanism 9, a middle support column 8, a transverse adjusting oil cylinder 10, a transverse moving frame 7, a transverse adjusting mechanism 4, a top formwork support beam 3, a side formwork unit 2 and a top formwork unit 1 from bottom to top to form a variable-section adjustable lining trolley;
s2: strain gauges are arranged on the longitudinal and transverse moving lifting mechanism 9, the middle support column 8, the transverse moving frame 7, the side die unit 2 and the top die unit 1, and reinforcing steel bar meters are arranged on the side die unit 2 and the top die unit 1;
s3: setting monitoring frequencies of each strain gauge and each reinforcing steel bar meter;
s4: setting the early warning value of the strain gauge to be 700 mu epsilon and setting the early warning value of the steel bar meter to be 140 MPa;
s5: pouring from bottom to top and carrying out real-time strain monitoring, and when the load borne by the strain gauge and/or the steel bar meter exceeds a corresponding early warning value, sending early warning information for stopping pouring; and when the loads borne by the strain gauge and the steel bar meter are within corresponding early warning values, continuously pouring until pouring is finished.
Compared with the traditional method. This lining cutting platform truck move about freely and quickly elevating system 9 and top mould unit 1 all can realize transversely widening the removal, realized promptly that move about freely and quickly elevating system 9 and arch portion adjust and widen the function, through moving about freely and quickly elevating system 9, intermediate strut post 8, sideslip frame 7, set up the foil gage on side forms unit 2 and the top mould unit 1, set up the rebar meter on side forms unit 2 and top mould unit 1 and realize real-time strain monitoring, realized the early warning of meeting an emergency to whole lining cutting platform truck, the steam generator is simple in structure, high durability and convenient operation, can satisfy continuous sectional construction demand, greatly reduced construction cost, construction efficiency is improved, construction safety is improved.
In this embodiment, when the traverse cylinder 10 drives the pair of traverse lifting mechanisms 9 to drive the top mold supporting beams 3 to move towards both sides through the traverse frame 7 and/or when the traverse lifting mechanisms 4 drive the top mold units 1 and the top mold supporting beams 3 to move towards both sides, the two top mold units 1 at the arch top are disconnected from each other, so that supplementary spaces are formed between the two top mold supporting beams 3 and between the two top mold units 1 at the arch top, then the top mold supplementary units 5 and the top mold supplementary supporting frames 6 are installed in the corresponding supplementary spaces and form supplementary connections with the corresponding top mold units 1 and the top mold supporting beams 3 to form new arch tops, and strain gauges are arranged on the new arch tops for monitoring. And the top die supplementing unit 5, the top die supplementing support frame 6 and the widened supplementing space form compensation, so that an arch structure adaptive to a new section is formed. And a strain gauge is arranged on the new arch top for monitoring, so that the monitoring accuracy is further improved.
In this embodiment, in step S3, it is ensured that the monitoring frequency gradually decreases as the pouring progresses. By the arrangement, stepped monitoring frequency from bottom to top is formed, working conditions are adapted, and overall monitoring is optimized.
In the embodiment, within the casting height range of 0m to 11m, the monitoring frequency of each strain gauge is set to be 3min to 5min once, and the monitoring frequency of each reinforcing steel bar meter is set to be 15min to 60min once. The monitoring frequency of each strain gauge is 5min once, the monitoring frequency of each steel bar meter is 15min once when the strain gauges are 0m to 2m, the monitoring frequency of each steel bar meter is 30min once when the strain gauges are 2m to 8m, and the monitoring frequency of each steel bar meter is 60min once when the strain gauges are 8m to 11 m.
In the embodiment, within the casting height range of 11m to 14m, the monitoring frequency of each strain gauge is set to be 12min to 15min once, and the monitoring frequency of each reinforcing steel bar meter is set to be 50min to 60min once. The monitoring frequency of each strain gauge is 15min once, and the monitoring frequency of each reinforcing steel bar meter is 60min once.
In this embodiment, when the pouring is finished, the monitoring frequency of each strain gauge is set to be once within 15min to 20min, and the monitoring frequency of each reinforcing bar meter is set to be once within 50min to 60 min. The monitoring frequency of each strain gauge is 20min once, and the monitoring frequency of each reinforcing steel bar meter is 60min once.
In this embodiment, in the mold removal stage, the monitoring frequency of each strain gauge is set to be 25min to 30min once. The specific monitoring frequency of each strain gauge is 30min once.
In this embodiment, leveling mechanism 4 includes translation hydro-cylinder 41 and a pair of supporting bench 42, and a pair of supporting bench 42 bottom is equipped with detains the wheel 43, and a pair of supporting bench 42 is interval cunning dress on sideslip frame 7 through detaining wheel 43, and a pair of supporting bench 42 is connected at the both ends of translation hydro-cylinder 41, and translation hydro-cylinder 41 is articulated with sideslip frame 7. When the width needs to be increased, the translation oil cylinder 41 is started, and as the support table 42 is slidably mounted on the traverse frame 7 through the buckle wheel 43, the support table 42 can move transversely on the traverse frame 7 to drive the top die unit 1 and the top die supporting beam 3 to move towards two sides, and when the required position is reached, the translation oil cylinder 41 is restrained by itself and the support table 42 is pressed downwards to realize positioning, so that the stability after the width is increased is ensured, and the structure is simple and the design is ingenious.
In this embodiment, the top die unit 1 includes a top die plate 11 and a top die supporting member 12, the top die plate 11 is connected to the top die supporting beam 3 through the top die supporting member 12, and the corresponding strain gauge and the steel bar gauge are disposed on the top die supporting member 12, wherein the steel bar gauge is close to the arch crown center line in the radial direction, and the strain gauge is far from the arch crown center line in the radial direction. Each top template 11 is connected with the top template supporting beam 3 through a top template supporting piece 12 to form a supporting system for the top templates 11, and the structure is simple and reliable.
In this embodiment, the top formwork support 12 includes a vertical support bar 121 and an oblique support bar 122, the vertical support bar 121 connects the top formwork 11 and the top formwork support beam 3, and the oblique support bar 122 connects the vertical support bar 121 and the top formwork support beam 3. Through the cooperation of vertical bracing piece 121 and diagonal bracing piece 122, improved the intensity of support system greatly.
In this embodiment, the vertical support rod 121 includes a vertical screw 1211 and a pair of vertical threaded rods 1212, one vertical threaded rod 1212 is hinged to the top die plate 11, the other vertical threaded rod 1212 is fixedly connected to the top die support beam 3, the vertical screw 1211 is in threaded connection with the pair of vertical threaded rods 1212, and the inclined support rod 122 is connected to the vertical threaded rod 1212 on the upper portion. In the structure, the change of the arc shape can be adapted through the hinge structure; and the adjustability of the distance between the top formwork 11 and the top formwork supporting beam 3 can be realized through the threaded connection of the vertical screw rod 1211 and the vertical threaded sleeve rod 1212, and the adaptability of the whole structure is further improved.
In this embodiment, the diagonal support rod 122 includes a diagonal screw rod 1221 and a pair of diagonal threaded sleeve rods 1222, the pair of diagonal threaded sleeve rods 1222 are respectively hinged to the vertical threaded sleeve rod 1212 and the top mold support beam 3, and the diagonal screw rod 1221 is in threaded connection with the pair of diagonal threaded sleeve rods 1222. The change of the arc shape can be adapted through the hinge structure; and through the threaded connection of slant lead screw 1221 and slant screw loop bar 1222, can realize the adjustability of interval between top form 11 and the top form supporting beam 3, further improved overall structure's adaptability.
In this embodiment, a horizontal pulling member 13 is connected between two vertical support rods 121 at the top of the arch. The arrangement of the transverse pull piece 13 improves the stability and strength between the two vertical support rods 121 on the top of the arch.
In this embodiment, the transverse pulling member 13 includes a transverse screw rod 131 and a pair of transverse threaded rods 132, the pair of transverse threaded rods 132 are respectively hinged to the vertical threaded rods 1212 at both sides, and the transverse screw rod 131 is in threaded connection with the pair of transverse threaded rods 132. The change of the arc shape can be adapted through the hinge structure; and through the threaded connection of the transverse screw rod 131 and the transverse threaded sleeve rod 132, the adjustability of the distance between the two vertical supporting rods 121 positioned at the top of the arch can be realized, and the adaptability of the whole structure is further improved.
In this embodiment, side forms unit 2 includes side forms 21 and side forms support piece 22, and side forms 21 is articulated with roof template 11, and side forms 21 is connected with the 9 avris of vertically and horizontally moving elevating system through side forms support piece 22, and corresponding foil gage and bar meter set up on side forms support piece 22, and wherein the bar meter on same pitch arc is close to the hunch portion, and the foil gage is kept away from the hunch portion. Each side template 21 is connected with the longitudinal and transverse moving lifting mechanism 9 through a side template supporting piece 22 to form a supporting system for the side templates 21, and the structure is simple and reliable.
In this embodiment, the side form supporting member 22 includes a side form supporting rod 221 and a side form anchor rod 222, the side form 21 is connected to the side of the longitudinal and transverse movement lifting mechanism 9 through the side form supporting rod 221, and the side form 21 is further connected to the bottom of the tunnel through the side form anchor rod 222. Through the cooperation of side forms bracing piece 221 and side forms stock 222, improved the intensity of support system greatly.
In this embodiment, the side mold support rod 221 includes a side mold threaded sleeve rod 2211 and a pair of side mold screws 2212, the pair of side mold screws 2212 are respectively hinged to the side mold plate 21 and the side of the vertical and horizontal movement lifting mechanism 9, and the side mold threaded sleeve rod 2211 is respectively in threaded connection with the pair of side mold screws 2212. The change of the arc shape can be adapted through the hinge structure; and the thread connection of the side die screw rod 2212 and the side die thread sleeve rod 2211 can realize the adjustability of the distance between the side die plate 21 and the longitudinal and transverse movement lifting mechanism 9, and further improve the adaptability of the whole structure.
In this embodiment, the adjacent top forms 11 are hinged to each other. Through mutual hinge joint between the top templates 11, the adjustability of radian is guaranteed, and the arc-shaped change can be adapted to.
In this embodiment, a locking mechanism 14 is provided between each adjacent top mold plate 11. The locking mechanism 14 can lock the top formwork 11 after being hinged and adjusted, and construction quality is greatly improved.
In this embodiment, the locking mechanism 14 includes a pair of connecting seats 141 and a locking plate 142, the pair of connecting seats 141 are respectively disposed on the adjacent top forms 11, and both ends of the locking plate 142 are respectively fastened to the corresponding connecting seats 141. In this structure, when each top form 11 is adjusted to a desired position, the locking is completed by the fastening connection between the locking piece 142 and the connecting seat 141, and the structure is simple and easy.
In this embodiment, the top mold complementing unit 5 includes a top mold complementing plate 51 and a complementing support rod 52, the top mold complementing plate 51 is disposed in the complementing space and hinged to the top mold plate 11, the complementing support rod 52 connects the top mold complementing plate 51 and the top mold complementing support frame 6, and the corresponding strain gauge is disposed on the complementing support rod 52. A new vault structure is formed by hinging the top mould supplementing plate 51 with the top mould plates 11 at two sides, and then a support is formed by supplementing the support rod 52, so that the stability of the new vault structure is ensured.
In this embodiment, the supplementary support rod 52 includes a vertical supplementary screw 521 and a pair of vertical supplementary threaded rods 522, one vertical supplementary threaded rod 522 is hinged to the top mold supplementary plate 51, the other vertical supplementary threaded rod 522 is fixedly connected to the top mold supplementary support frame 6, and the vertical supplementary screw 521 is in threaded connection with the pair of vertical supplementary threaded rods 522. The change of the arc shape can be adapted through the hinge structure; and the adjustability of the distance between the top die supplement plate 51 and the top die supplement support frame 6 can be realized through the threaded connection of the vertical supplement screw rod 521 and the vertical supplement threaded sleeve rod 522, and the adaptability of the whole structure is further improved.
In this embodiment, the top mold supplement support frame 6 includes a supplement cross beam 61, a support cross beam 62, and a plurality of vertical beams 63, the supplement cross beam 61 is disposed in the supplement space and connected to the top mold support beam 3, the support cross beam 62 is mounted on the supplement cross beam 61 through the plurality of vertical beams 63, and the vertical supplement threaded sleeve rod 522 is fixedly connected to the support cross beam 62. In the structure, a new supporting system of the vault structure is formed by the supplementary cross beams 61, the supporting cross beams 62 and the plurality of vertical beams 63, and the stability of the new vault structure is ensured.
In this embodiment, the traverse frame 7 includes an inner fixed beam 71 and a pair of outer traverse frames 72, the inner fixed beam 71 is fixedly connected with the top of the middle support column 8, the outer traverse frames 72 are slidably mounted on the inner fixed beam 71, a pair of vertical and horizontal moving lifting mechanisms 9 is fixedly connected with the outer traverse frames 72 on the corresponding sides, a pair of leveling mechanisms 4 is slidably connected with the outer traverse frames 72 on the corresponding sides, and corresponding strain gauges are disposed on the inner fixed beam 71. The transverse adjusting oil cylinder 10 drives the transverse moving lifting mechanism 9 to transversely move, so that the outer transverse moving sleeve frame 72 is driven to move on the inner fixing beam 71, the widening function is finally realized, and the structure is simple and ingenious.
In this embodiment, the cross-car frame 7 further includes an extension block 73, and the extension block 73 is additionally connected to both ends of the inner fixed beam 71. The arrangement of the extension block 73 can lengthen the inner fixed beam 71, considerably prolongs the variable stroke of the outer transverse moving sleeve frame 72, can adapt to the construction of a large-span variable-section tunnel, and has simple structure and ingenious conception.
In this embodiment, the vertical and horizontal movement lifting mechanism 9 includes a vertical and horizontal movement frame 91 and a lifting cylinder 92, the outer horizontal movement jacket frame 72 is fixedly connected with the vertical and horizontal movement frame 91, the horizontal movement cylinder 10 is connected with the vertical and horizontal movement frame 91 of the corresponding side, the lifting cylinder 92 is installed on the vertical and horizontal movement frame 91, a vertical movement roller 93 is installed at the bottom of the lifting cylinder 92, a horizontal movement roller 94 is arranged at the bottom of the vertical and horizontal movement frame 91, and the corresponding strain gauge is arranged on the vertical and horizontal movement frame 91. When the width needs to be widened, the transverse moving rail can be laid firstly, the transverse moving roller 94 at the bottom of the longitudinal and transverse moving frame 91 bears on the transverse moving rail, at the moment, the lifting oil cylinder 92 contracts to enable the longitudinal moving roller 93 to be separated from the longitudinal moving rail, then the transverse adjusting oil cylinder 10 is started to drive the longitudinal and transverse moving lifting mechanism 9 to transversely move, so that the outer transverse moving sleeve frame 72 is driven to move on the inner fixed beam 71, and finally the widening function is realized. The lifting oil cylinder 92 can also drive the top die unit 1 to descend, so that demolding is facilitated.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to be limited thereto. Those skilled in the art can make numerous possible variations and modifications to the present invention, or modify equivalent embodiments to equivalent variations, without departing from the scope of the invention, using the teachings disclosed above. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention should fall within the protection scope of the technical scheme of the present invention, unless the technical spirit of the present invention departs from the content of the technical scheme of the present invention.
Claims (12)
1. The strain monitoring method of the variable-section adjustable lining trolley is characterized in that the lining trolley comprises a plurality of top die units (1), a pair of side die units (2), a pair of top die supporting beams (3), a pair of leveling mechanisms (4), a transverse moving frame (7), a middle supporting column (8), a pair of longitudinal transverse moving lifting mechanisms (9) and a pair of transverse adjusting oil cylinders (10); the monitoring method comprises the following steps:
s1: assembling a longitudinal and transverse moving lifting mechanism (9), a middle support column (8), a transverse adjusting oil cylinder (10), a transverse moving frame (7), a transverse adjusting mechanism (4), a top die support beam (3), a side die unit (2) and a top die unit (1) from bottom to top to form a variable-section adjustable lining trolley;
s2: strain gauges are arranged on the longitudinal and transverse moving lifting mechanism (9), the middle supporting column (8), the transverse moving frame (7), the side die unit (2) and the top die unit (1), and steel bar meters are arranged on the side die unit (2) and the top die unit (1);
s3: setting monitoring frequencies of each strain gauge and each reinforcing steel bar meter;
s4: setting the early warning value of the strain gauge to be 700 mu epsilon and setting the early warning value of the steel bar meter to be 140 MPa;
s5: pouring from bottom to top and carrying out real-time strain monitoring, and when the load borne by the strain gauge and/or the steel bar meter exceeds a corresponding early warning value, sending early warning information for stopping pouring; and when the loads borne by the strain gauge and the steel bar meter are within corresponding early warning values, continuously pouring until pouring is finished.
2. The strain monitoring method of a variable-section adjustable lining trolley according to claim 1, wherein: when the transverse adjusting oil cylinder (10) drives the pair of longitudinal transverse moving lifting mechanisms (9) to drive the top die supporting beams (3) to move towards two sides through the transverse moving frame (7) and/or when the transverse adjusting mechanism (4) drives the top die units (1) and the top die supporting beams (3) to move towards two sides, the two top die units (1) at the arch top are disconnected with each other, so that a supplementary space is formed between the two top die supporting beams (3) and between the two top die units (1) at the arch top, then the top die supplementary unit (5) and the top die supplementary supporting frame (6) are installed into the corresponding supplementary space and form supplementary connection with the corresponding top die units (1) and the top die supporting beams (3) to form a new arch top, and a strain gauge is arranged on the new arch top for monitoring.
3. The strain monitoring method of a variable-section adjustable lining trolley according to claim 2, wherein: in step S3, it is ensured that the monitoring frequency thereof is gradually decreased as the casting proceeds.
4. The strain monitoring method of a variable-section adjustable lining trolley according to claim 3, wherein: and setting the monitoring frequency of each strain gauge to be 3-5 min once and setting the monitoring frequency of each reinforcing steel bar meter to be 15-60 min once within the casting height range of 0-11 m.
5. The strain monitoring method of a variable-section adjustable lining trolley according to claim 4, wherein: within the casting height range of 11m to 14m, the monitoring frequency of each strain gauge is set to be 12min to 15min once, and the monitoring frequency of each reinforcing steel bar meter is set to be 50min to 60min once.
6. The strain monitoring method of a variable-section adjustable lining trolley according to claim 5, wherein: and when the pouring is finished, setting the monitoring frequency of each strain gauge to be 15-20 min once, and setting the monitoring frequency of each reinforcing steel bar meter to be 50-60 min once.
7. The strain monitoring method of a variable-section adjustable lining trolley according to claim 6, wherein: and in the mold removal stage, setting the monitoring frequency of each strain gauge to be 25min-30min once.
8. The strain monitoring method of a variable-profile adjustable lining trolley according to any one of claims 2 to 7, wherein: the top die unit (1) comprises a top die plate (11) and a top die supporting piece (12), the top die plate (11) is connected with the top die supporting beam (3) through the top die supporting piece (12), and the corresponding strain gauge and the corresponding steel bar gauge are arranged on the top die supporting piece (12), wherein the steel bar gauge is close to the center line of the top of the arch in the radial direction, and the strain gauge is far away from the center line of the top of the arch in the radial direction.
9. The strain monitoring method of a variable-section adjustable lining trolley according to claim 8, wherein: side forms unit (2) include side forms (21) and side forms support piece (22), side forms (21) are articulated with cope match-plate pattern (11), side forms (21) are connected with vertically and horizontally shifting elevating system (9) avris through side forms support piece (22), and corresponding foil gage and bar meter set up on side forms support piece (22), wherein on same pitch arc the bar meter is close to hunch top, foil gage and keeps away from hunch top.
10. The strain monitoring method of a variable-section adjustable lining trolley according to claim 8, wherein: the top die supplementing unit (5) comprises a top die supplementing plate (51) and a supplementing supporting rod (52), the top die supplementing plate (51) is arranged in the supplementing space and hinged with the top die plate (11), the supplementing supporting rod (52) is connected with the top die supplementing plate (51) and the top die supplementing supporting frame (6), and the corresponding strain gauge is arranged on the supplementing supporting rod (52).
11. The strain monitoring method of a variable-profile adjustable lining trolley according to any one of claims 2 to 7, wherein: the transversely-moving vehicle frame (7) comprises an inner fixed beam (71) and a pair of outer transversely-moving sleeve frames (72), the inner fixed beam (71) is fixedly connected with the top of the middle supporting column (8), the outer transversely-moving sleeve frames (72) are slidably arranged on the inner fixed beam (71), a pair of transversely-moving lifting mechanisms (9) is fixedly connected with the outer transversely-moving sleeve frames (72) on the corresponding sides, a pair of leveling mechanisms (4) is slidably connected with the outer transversely-moving sleeve frames (72) on the corresponding sides, and corresponding strain gauges are arranged on the inner fixed beam (71).
12. The strain monitoring method of a variable-profile adjustable lining trolley according to any one of claims 2 to 7, wherein: move elevating system (9) about freely and quickly including moving about freely and quickly (91) and lift cylinder (92), outer sideslip set frame (72) with move about freely and quickly (91) fixed connection, horizontal transfer cylinder (10) are connected with the frame (91) that moves about freely and quickly of corresponding side, lift cylinder (92) are installed and are moved about freely and quickly on frame (91), vertical movement gyro wheel (93) are installed to lift cylinder (92) bottom, move about freely and quickly frame (91) bottom and be equipped with sideslip gyro wheel (94), corresponding foil gage setting is moved about freely and quickly on frame (91).
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