CN116971800B - Movable template trolley system for construction of partition wall in variable-section tunnel and conversion construction method - Google Patents

Movable template trolley system for construction of partition wall in variable-section tunnel and conversion construction method Download PDF

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Publication number
CN116971800B
CN116971800B CN202311223906.5A CN202311223906A CN116971800B CN 116971800 B CN116971800 B CN 116971800B CN 202311223906 A CN202311223906 A CN 202311223906A CN 116971800 B CN116971800 B CN 116971800B
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template
tunnel
groups
intermediate wall
construction
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CN116971800A (en
Inventor
蒋坪临
李久林
廖秋林
武福美
王楚楚
周小航
孙晓鹏
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Beijing Urban Construction Rail Transit Construction Engineering Co ltd
Beijing Urban Construction Group Co Ltd
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Beijing Urban Construction Rail Transit Construction Engineering Co ltd
Beijing Urban Construction Group Co Ltd
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/20Hydro energy

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Abstract

The invention provides a movable template trolley system for construction of a variable-section tunnel middle partition wall and a conversion construction method. The movable template trolley system comprises two groups of movable template trolleys and two groups of intermediate wall template assemblies, wherein the movable template trolleys comprise: a walking device; the portal frame is arranged and supported on the travelling device through the lifting system; a trapezoid rack, the bottom of which is fixed on the door-type frame; the rotating support adjusting assembly is connected to the top of the trapezoid rack; the intermediate wall form assembly includes: the upper template is connected with the trapezoid rack through the transverse support adjusting assembly, the top of the upper template is abutted against the tunnel vault lining, and at least part of the upper template is rotatably connected with the rotary support adjusting assembly; and the top of the lower template is connected to the bottom of the upper template, and the bottom of the lower template is close to or abutted against the tunnel bottom plate. The invention can solve the problems of difficult adjustment, high construction cost and long construction period of the template trolley and the template structure when the template trolley in the prior art is used for constructing the intermediate wall on different tunnel sections.

Description

Movable template trolley system for construction of partition wall in variable-section tunnel and conversion construction method
Technical Field
The invention belongs to the technical field of mountain tunnel construction, and particularly relates to a movable template trolley system for construction of a partition wall in a variable section tunnel and a conversion construction method.
Background
In urban rail transit engineering, a method of arranging an intermediate wall in a large-section tunnel to form two independent tunnels is often adopted to meet the requirement of double-line traffic arrangement, and the construction quality of the method is closely related to the safety of later-period operation of the tunnel. The intermediate wall is mostly of a thin-wall reinforced concrete structure, the height and the thickness are relatively large, and the height and the width of the intermediate wall in different tunnel sections are different, so that the same template trolley cannot meet the construction requirement of the full-line intermediate wall, and certain difficulty is brought to the construction of the intermediate wall.
The existing trolley is inconvenient to operate, after one section of intermediate wall is constructed, a simple template rack is required to be manually moved away, the trolley moves to the next construction section, the trolley is manually moved and positioned, a loader is required to be matched with the trolley to move, the trolley is installed and moved, and the like, particularly in the construction of the variable section intermediate wall, the construction cost is increased, the construction period is prolonged, and the construction efficiency is reduced.
In tunnel construction design, the cross-sectional dimensions of the sections of the same tunnel often vary. If a template trolley is manufactured for each section, the construction cost is obviously increased, so that the template trolley is designed into a trolley for the variable section to adapt to the construction requirements of different sections.
Disclosure of Invention
Aiming at the defects of the prior art, a movable template trolley system for construction of a variable-section tunnel intermediate wall and a conversion construction method are provided, so that the problems that the template trolley and a template structure are fixed and are not easy to adjust, the construction cost is high and the construction period is long when the template trolley in the prior art is used for constructing the intermediate wall on different tunnel sections are solved.
The technical scheme of the invention is as follows:
the first aspect of the present invention provides a moving template trolley system for construction of a variable-section tunnel intermediate wall, the moving template trolley system comprising two sets of moving template trolleys and two sets of intermediate wall template assemblies, wherein the two sets of moving template trolleys are symmetrically arranged in the tunnel by a tunnel center line and are connected by a plurality of opposite pull rods, the two sets of intermediate wall template assemblies are oppositely arranged between the two sets of moving template trolleys, and the moving template trolley comprises:
the travelling device is arranged on a travelling rail in the tunnel and can longitudinally reciprocate along the travelling rail;
the door type frame is arranged and supported on the travelling device through a lifting system, and the lifting system is used for adjusting the height of the door type frame when the construction of the variable-section intermediate wall is changed;
a trapezoid rack, the bottom of which is fixed on the door frame;
one end of the rotating support adjusting component is connected to the top of the trapezoid bench;
the intermediate wall template assembly includes:
the upper template is connected with the trapezoid rack through a transverse support adjusting assembly, the top of the upper template is abutted against the tunnel vault lining and at least partially rotatably connected with the other end of the rotary support adjusting assembly, and the upper template can be turned by the rotary support adjusting assembly to be far away from the central line of the tunnel;
and the top of the lower template is connected to the bottom of the upper template, and the bottom of the lower template is close to or abutted against the tunnel bottom plate.
By means of the movable template trolley system provided by the first aspect of the invention, the template height is switched in the construction of the partition wall in the multi-section tunnel, one set of trolley is suitable for the construction of various tunnels with different sections, and the construction efficiency is improved.
The second aspect of the invention provides a conversion construction method for constructing a partition wall in a variable-section tunnel based on the movable template trolley system in the first aspect, which comprises the following steps:
s10: finishing the construction of the intermediate wall in the standard section tunnel construction area;
s20: starting a translation oil cylinder and a translation guide pillar to shrink, and separating two groups of intermediate wall template components from each other in a standard section tunnel construction area;
s30: cutting off an additional structure of the template trolley, starting the lifting oil cylinder to shrink so as to restore the portal frame to a basic portal frame;
s40: starting a traveling device, and converting the movable template trolley from a standard section tunnel construction area to a variable section tunnel construction area;
s50: starting the lifting oil cylinder to extend again, lifting the foundation portal, fixing an additional structure on the portal frame and replacing the intermediate wall template assembly to form a movable template trolley system suitable for the construction of the intermediate wall in the variable-section tunnel construction area;
s60: starting the translation oil cylinder and the translation guide post to extend again, and pushing and compacting the middle wall template component;
s70: concrete pouring is carried out on the middle partition wall of the variable section tunnel construction area;
s80: and (3) removing the upper template and the lower template of the middle partition wall template assembly, and continuing pouring the next circulation middle partition wall.
Compared with the prior art, the invention has the beneficial effects that: the invention provides a movable template trolley system for constructing a variable-section tunnel middle partition wall and a conversion construction method, which at least have the following actual effects:
according to the invention, the height of the template is switched in the construction of the partition wall of the multi-section tunnel by the lifting oil cylinder height adjusting system of the portal frame, one set of trolley is suitable for the construction of various tunnels with different sections, and the construction efficiency is improved.
According to the invention, the trapezoidal rack is designed on the door type frame, the middle partition wall template component is supported from the upper position of the middle partition wall template component by means of the trapezoidal rack, so that the rationality of supporting stress and the stability of the template are ensured, and in addition, the stability of transverse stress in the supporting process can be enhanced by the trapezoidal structure of the trapezoidal rack.
The upper section and the lower section sectional templates designed in the invention greatly reduce the height and the weight of the templates in the large-section tunnel construction, and are convenient for site transportation, formwork erection and disassembly.
The bottom detachable template designed in the invention can adapt to different section requirements, can select templates with different heights according to specific conditions, and can realize flexible construction aiming at different sections by combining multiple groups of templates with the same or different heights.
The top template designed in the invention is hinged with the upper template, can be conveniently turned outwards by virtue of the screw rod, can be separated from the tunnel vault lining easily during the demolding, and avoids the problem that the traditional template is embedded into the tunnel vault lining too deeply or is abutted too tightly so as to be difficult to demold.
When the movable template trolley system is disassembled, the top template is turned outwards, the upper template and the lower template are contracted outwards by virtue of the translation oil cylinder and the translation guide post, so that the rapid separation of the template and the middle partition wall lining is realized, and the operation is convenient and simple.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It will be apparent to those skilled in the art from this disclosure that the drawings described below are merely exemplary and that other embodiments may be derived from the drawings provided without undue effort.
The structures, proportions, sizes, etc. shown in the present specification are shown only for the purposes of illustration and description, and are not intended to limit the scope of the invention, which is defined by the claims, but rather by the claims.
FIG. 1 is a front view of a standard section of a partition template trolley in accordance with one embodiment of the present invention;
FIG. 2 is a side view of a standard section of a partition template trolley in accordance with one embodiment of the present invention;
FIG. 3 is an enlarged view of a portion of the area of FIG. 1;
FIG. 4 is a front view of a standard section of a partition template trolley according to yet another embodiment of the present invention;
FIG. 5 is a front view of a standard section of a partition template trolley in accordance with yet another embodiment of the present invention;
fig. 6 is a side view of a template according to one embodiment of the present invention.
In the figure: 1. a walking device; 101. a driving motor; 102. a roller; 2. a door frame; 201. a door frame unit; 202. a transverse connecting rod; 203. diagonal bracing; 3. a trapezoidal stand; 301. a trapezoidal stage unit; 302. a diagonal support bar; 303. a vertical support rod; 304. a cross bar; 4. a rotary support adjustment assembly; 401. a first lead screw; 402. a second lead screw; 5. a walking rail; 6. a lifting system; 7. an upper template; 701. a top template; 702. an upper template; 8. a lower template; 801. a lower template; 802. a bottom removable template; 9. guide sleeve; 10. translating the guide post; 11. a translation cylinder; 12. grouting holes; 13. vibrating a window; a third screw 14; 15. and a lateral supporting rod.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the embodiments of the present invention will be described in further detail with reference to the embodiments and the accompanying drawings. The exemplary embodiments of the present invention and their descriptions herein are for the purpose of explaining the present invention, but are not to be construed as limiting the invention.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
It should be understood that the terms "comprises/comprising," "consists of … …," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a product, apparatus, process, or method that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such product, apparatus, process, or method as desired. Without further limitation, an element defined by the phrases "comprising/including … …," "consisting of … …," and the like, does not exclude the presence of other like elements in a product, apparatus, process, or method that includes the element.
It is further understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship based on that shown in the drawings, merely to facilitate describing the present invention and to simplify the description, and do not indicate or imply that the devices, components, or structures referred to must have a particular orientation, be configured or operated in a particular orientation, and are not to be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
The tunnel section in the construction of cloud and fog mountain tunnel interval intermediate wall totally calculates 3 kinds of sections, including standard section, goaf section, ratchet compensation anchor and fan lining section, wherein the partition wall height is 10.55m, 11.25m, 10.85m respectively, and the cross section area is 132.93 square meters, 136.71 square meters, 150.53 square meters respectively. Because the intermediate wall heights of different sections are different, the conventional same template trolley cannot meet the construction requirement of the full-line intermediate wall, the construction cost is obviously increased when one template trolley is manufactured for each section, in addition, the tunnel bottom plate is not uniformly flat, and new requirements are also provided for the bottom of the template.
In view of the above, the invention designs a movable template trolley system for constructing the partition wall in the variable-section tunnel so as to adapt to the construction requirements of different sections, reduce the construction cost and shorten the construction period.
The implementation of the present invention will be described in detail with reference to the preferred embodiments.
Referring to fig. 1, a moving formwork trolley system for construction of a variable section tunnel intermediate wall includes two sets of moving formwork trolleys symmetrically arranged in a tunnel with a tunnel center line between the two sets of moving formwork trolleys and connected with a plurality of pairs of tie bars, and two sets of intermediate wall formwork assemblies oppositely installed between the two sets of moving formwork trolleys, and after being assembled and fixed in this way, a casting area of the tunnel intermediate wall is formed between the two sets of intermediate wall formwork assemblies, and the tunnel intermediate wall is formed by casting concrete.
As shown in fig. 1, the two groups of movable template trolleys have the same structure and are symmetrically arranged at two sides of the central line of the tunnel, and each group of movable template trolleys comprises a traveling device 1, a portal frame 2, a trapezoid rack 3 and a rotary support adjusting assembly 4.
Specifically, the traveling device 1 is arranged on a traveling rail 5 in the tunnel and can travel back and forth in the longitudinal direction of the tunnel along the traveling rail 5; the walking track 5 adopts steel rails, is laid on a tunnel bottom plate in advance, two steel rails are laid on each side of a tunnel central line, two groups of walking devices 1 are arranged, and the two groups of walking devices 1 correspondingly support the left leg and the right leg of the portal frame.
In some embodiments, referring to fig. 2, the running gear 1 is provided with a driving motor 101 and at least two sets of rollers 102, the two sets of rollers 102 being rollingly disposed on the running rail 5 at both ends of the longitudinal direction of the portal frame 2, the driving motor 101 driving at least one set of rollers 102 so that the moving template trolley can move on the running rail 5.
The present embodiment shows a set of driving motors 101 driving one set of rollers 102, however, a set of driving motors 101 may be provided for each set of rollers 102.
In addition, in this embodiment, each set of rollers 102 is composed of two rollers, and the front and rear rollers are connected by a roller bracket to realize synchronous movement, and the driving motor 101 is disposed on the roller bracket, for example, disposed at one end of the roller bracket.
Referring again to fig. 1, the portal frame 2 is disposed and supported on the traveling device 1 via a lifting system 6, and the lifting system 6 is used to adjust the height of the portal frame 2 to accommodate the intermediate wall form assemblies of different heights when the variable-section intermediate wall construction is switched.
In some embodiments, as shown in fig. 1 and 2, the portal frame 2 comprises a plurality of groups of portal frame units 201, and adjacent groups of portal frame units 201 are connected with diagonal braces 203 through transverse connecting rods 202, and the diagonal braces 203 are commonly used as scissors braces; each group of portal frame units 201 is composed of two side upright posts and cross beams respectively connected with the two side upright posts, preferably adopting H-shaped steel with the specification size of 2.5 mm and 4.0m, the bottoms of the two side upright posts are connected with the walking device 1 through the lifting system 6, and supporting plates or supporting beams can be additionally arranged at the connecting corners between the upright posts and the cross beams. In the embodiment, five-span six-group door type frame units 201 are adopted, the overall length reaches 12m, and a stable and firm template trolley main body structure is formed by means of transverse connecting rods 202 and diagonal braces 203. The adjacent two columns on the inner side are connected by adopting a plurality of groups of opposite pull rods in a opposite pulling way, the columns on the outer side are fixedly connected with the inner wall of a tunnel through a plurality of lateral support rods 15, the lateral support rods 15 can be further provided with jacks, or an adjustable screw rod is adopted, and the lateral support rods 15 can support the formwork trolley to provide lateral support force so as to offset transverse thrust generated in the concrete pouring process.
In some embodiments, as shown in fig. 2, the lifting system 6 adopts at least two groups of lifting cylinders, the working stroke of the lifting cylinders is designed to be 400mm, the two groups of lifting cylinders are respectively arranged at two longitudinal ends of the portal frame 2, one end of the cylinder body of each lifting cylinder is supported on the running gear 1, in particular on a roller bracket between the front roller 102 and the rear roller 102, the other end of each lifting cylinder is connected with the portal frame 2, for example, a bracket can be welded at each longitudinal end of the portal frame 2, one end of a piston of each lifting cylinder is connected with the bracket, and lifting of the portal frame 2 is realized through supporting the bracket, so as to adjust the height of the trolley.
With continued reference to fig. 1, the present invention provides a trapezoidal rack 3 on a portal frame 2, which can provide a construction operation space to a greater extent. The trapezoid rack 3 is located at the middle upper part of the tunnel section on the whole, the middle partition wall template component is supported from the middle upper part by means of the trapezoid rack 3, the rationality of supporting stress and the stability of the template are guaranteed, and in addition, the trapezoid structure of the trapezoid rack 3 has good stability in transverse stress and longitudinal stress.
In some embodiments, the ladder stand 3 includes a plurality of sets of ladder stand units 301, and adjacent sets of ladder stand units 301 are connected by transverse connection rods 202; each group of trapezoidal rack units 301 comprises an inclined support rod 302, a vertical support rod 303 and a cross rod 304, wherein the inclined support rod 302 is far away from the central line of the tunnel, the vertical support rod 303 is close to the central line of the tunnel, the bottom end of the inclined support rod 302 and the bottom end of the vertical support rod 303 are respectively fixed on the corresponding portal frame 2, and the top end of the inclined support rod 302 and the top end of the vertical support rod 303 are connected into a whole through the cross rod 304, so that the trapezoidal rack units 301 with right-angle sides (the vertical support rod 303) and inclined sides (the inclined support rod 302) outside are formed. By providing right angle edges, the transverse support adjustment assembly (described in detail below) is conveniently mounted and connected, and by providing beveled edges outwardly, so as to achieve a stable transverse support, the cross bar 304 facilitates the placement of the rotary support adjustment assembly 4 thereon (described in detail below).
Referring again to fig. 1, the present invention provides a rotation support adjustment assembly 4 on a trapezoidal gantry 3, one end of which is connected to the top of the trapezoidal gantry 3; the function of the rotary support adjustment assembly 4 will be described below in connection with an intermediate wall form assembly.
The middle wall template assembly is manufactured by an upper section and a lower section, and comprises an upper template 7 and a lower template 8, wherein the upper template 7 is connected with a trapezoid bench 3 through a transverse support adjusting assembly, the top of the upper template is abutted against a tunnel vault lining, and at least part of the upper template is rotatably connected with the other end of a rotary support adjusting assembly 4, and can be turned over by the rotary support adjusting assembly 4 to be far away from the central line of a tunnel; the top of the lower template 8 is connected to the bottom of the upper template 7, and the bottom is close to or abutted against the tunnel bottom plate. When the upper template 7 is turned away from the central line of the tunnel by the rotary support adjusting assembly 4, the top of the upper template 7 is separated from the top plate of the tunnel and is opened outwards, so that the mould is convenient to disassemble.
In some embodiments, as shown in fig. 3, the transverse support adjusting assembly is provided with at least two groups, each group is composed of a guide sleeve 9, a translation guide pillar 10 and a translation cylinder 11, one group of guide sleeves 9 is matched with the translation guide pillar 10, one end of each group of guide sleeves is connected with the trapezoidal rack 3, in particular, is connected with the side face of a cross rod 304 of the trapezoidal rack 3, the other end of each group of guide sleeves is connected with the upper template 7, one end of each group of translation cylinder 11 is connected with the trapezoidal rack 3, in particular, is connected with the side face of a column 303 of the trapezoidal rack 3, and the other end of each group of translation cylinder 11 is connected with the upper template 7; the two groups of transverse supporting and adjusting components are respectively connected to the upper position and the lower position of the side face of the trapezoid rack 3, and the translation oil cylinder 11 is used for controlling the upper template 7 to move towards the position close to or far from the central line of the tunnel so as to adjust the relative distance between the left intermediate wall template component and the right intermediate wall template component.
The embodiment adopts the expansion and contraction of the translation oil cylinder 11, adjusts the relative distance of the middle partition wall template assembly, and demolds the middle partition wall template assembly after concrete pouring is completed, and simultaneously carries out transverse guide on the middle partition wall template assembly when the middle partition wall template assembly is subjected to expansion and contraction adjustment by means of the mutual cooperation of the guide sleeve 9 and the translation guide pillar 10, the translation guide pillar 10 is embedded in the guide sleeve 9, the guide sleeve 9 has larger rigidity, the guide sleeve 9 and the translation guide pillar 10 provide vertical support for the middle partition wall template assembly, bear the weight of the middle partition wall template assembly, prevent the weight from influencing the pouring quality of a wall body due to self-weight sinking, and also avoid the influence on the normal expansion and contraction of the translation oil cylinder 11 due to the self-weight sinking.
With continued reference to fig. 1, in this embodiment, the improved design of the middle partition wall module is firstly implemented by adopting an upper module 7 and a lower module 8 which are made of an upper module and a lower module, wherein the upper module 7 is composed of a top module 701 and an upper module 702, the top of the top module 701 is abutted against the tunnel vault lining, and the bottom of the top module 701 is hinged with the top of the upper module 702; through setting up split type cope match-plate pattern 701, with cope match-plate pattern 702 articulated connection, the separation of template top and tunnel vault lining when being convenient for the form removal can only need outwards suitably overturn.
In order to cooperate with the supporting of the top template 701 and the upper template 702 and the turning of the top template 701, the rotary supporting and adjusting assembly comprises a first screw rod 401 and a second screw rod 402, wherein one end of the first screw rod 401 is connected with the top of the trapezoid rack 3, specifically connected and fixed on the cross rod 304 of the trapezoid rack 3, more specifically connected and fixed on one side of the cross rod 304 far away from the central line of the tunnel, the other end of the first screw rod is hinged with the top template 701, one end of the second screw rod 402 is connected with the top of the trapezoid rack 3, specifically connected and fixed on the cross rod 304 of the trapezoid rack 3, more specifically connected and fixed on one side of the cross rod 304 near the central line of the tunnel, and the other end of the second screw rod 402 is connected with the upper template 702. Through adopting adjustable first lead screw 401 and second lead screw 402, be convenient for apply pretightning force to cope match-plate pattern 701 and cope match-plate pattern 702 to be convenient for apply the tilting force to cope match-plate pattern 701 when the form removal, overcome the problem that can't the form removal because of the too dark or too tight of embedding of template embedment tunnel inner wall under the past circumstances.
Referring again to fig. 1, the lower template 8 is composed of a lower template 801 and a bottom detachable template 802, wherein the top of the lower template 801 is connected with the bottom of the upper template 702, the top of the bottom detachable template 802 is detachably connected with the bottom of the lower template 801, for example, the bottom of the bottom detachable template 802 is closely attached and fixed by using bolts, and is close to the tunnel bottom plate and a preset distance from the tunnel bottom plate. The template 802 can be dismantled through the design bottom, reserves certain space for the template bottom to deal with tunnel ground unevenness scheduling problem, more convenient nimble when the mid-partition wall section installation template of co-altitude not, and when the form is torn open, because the space that the bottom reserved, the template is not contacted with tunnel bottom plate, when shrink translation hydro-cylinder, is unlikely to the template damage. Preferably, the bottom of the bottom removable template 802 is spaced 50mm from the tunnel floor.
The size of the bottom detachable template 802 can be flexibly designed according to the field situation, the bottom detachable template 802 is designed into several sizes such as 50mm, 150mm, 206mm, 650mm and the like, one or more groups of combinations of one size can be adopted, or multiple groups of combinations of several sizes can be adopted according to the requirement, see fig. 1, the bottom detachable template 802 adopts a piece of height of 150mm, see fig. 4, the bottom detachable template 802 adopts a piece of height of 650mm, see fig. 5, the bottom detachable template 802 adopts two pieces of combinations of height of 150mm and a piece of height of 206mm, and the height of the bottom detachable template 802 is adjusted by a lifting cylinder of the lifting system 6 so as to install the bottom detachable templates 802 with different specifications at the bottom.
For the case that the height of the bottom detachable formwork 802 is large, a supporting and adjusting member may be further configured, for example, a group of third screw rods 14 is configured, one end of each third screw rod 14 is connected with the tunnel bottom plate, the other end is hinged with the bottom detachable formwork 802, and the third screw rods 14 support the bottom detachable formworks 802 on both sides from both sides.
In the present invention, as shown in fig. 1 and 6, grouting holes 12 are provided on a top formwork 701, the grouting holes are distributed in a linear arrangement, and further, vibrating windows 13 are provided on an upper formwork 702 and a lower formwork 801, and when concrete is poured between the formworks, manual vibration can be performed through the vibrating windows 13.
The conversion construction method for constructing the partition wall in the variable-section tunnel based on the movable template trolley system comprises the following steps of:
s10: finishing the construction of the intermediate wall in the standard section tunnel construction area; when the standard section works, the walking track 5 is paved in the tunnel, then the two templates are moved to a working area in the tunnel through the walking device, the two templates are erected through each hydraulic cylinder and fixed through the jack and the hinge piece, and therefore the middle partition wall template and the tunnel vault lining form a material injection cavity.
During pouring, the stirred concrete is sent to the grouting holes 12 by a delivery pump for pouring. The output end of the material distribution assembly is inserted into the grouting hole 12, the material distribution assembly uniformly lays concrete in the material injection cavity, so that the concrete is uniformly laid in the material injection cavity, the occurrence of concrete accumulation is reduced, and the problems that the side template is biased by long-term backlog of concrete on one side of the template, the template is deformed and the like are avoided.
S20: after the construction of the standard section intermediate wall is completed, the related supporting members are removed, the translation cylinder 11 and the translation guide post 10 are started to shrink, so that the templates are separated from each other and separated from the lining surface, and when the hydraulic cylinder shrinks, the hydraulic cylinder must shrink for a plurality of times, and one-time forced demoulding is forbidden. The shrinkage travel of the oil cylinder is 150 mm-200 mm.
S30: the additional structure (mainly the lateral support bar 15) of the template trolley is cut off, and the lifting cylinder is started to shrink, so that the portal frame is restored to be a basic portal frame.
S40: and starting the traveling device, and switching the movable template trolley from the previous section to the next section with different sizes, for example, switching the movable template trolley from the standard section to the goaf section working area.
S50: starting the lifting oil cylinder to extend again, lifting the foundation portal frame, fixing an additional structure on the portal frame and replacing the intermediate wall template assembly to form a movable template trolley system suitable for the next sections with different sizes, and finishing the vertical die and fixing of the intermediate wall template through each hydraulic cylinder and each supporting system.
S60: and starting the translation oil cylinder and the translation guide post to extend again, and pushing and compacting the middle wall template component.
S70: pouring the section concrete intermediate wall to finish quick conversion construction of the intermediate wall between two variable sections.
S80: and (3) removing the upper template and the lower template of the middle partition wall template assembly, and continuing pouring the next circulation middle partition wall.
When the upper template and the lower template assembly of the middle partition wall template assembly are disassembled, the bottom detachable template 802 is firstly disassembled, then the top template 701 is outwards turned through the first screw rod 401, the top template 701 is separated from the tunnel vault lining, and then the translation cylinder 11 is contracted to separate the upper template 702 and the lower template 801 from the middle partition wall, so that the disassembly is completed.
It is easy to understand by those skilled in the art that the above preferred embodiments can be freely combined and overlapped without conflict.
The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the particular forms disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

Claims (10)

1. A movable template trolley system for constructing a variable-section tunnel intermediate wall is characterized by comprising two groups of movable template trolleys and two groups of intermediate wall template assemblies, wherein the two groups of movable template trolleys are symmetrically arranged in the tunnel by a tunnel center line and are connected by a plurality of opposite pull rods, the two groups of intermediate wall template assemblies are oppositely arranged between the two groups of movable template trolleys, and
the moving template trolley includes:
the travelling device is arranged on a travelling rail in the tunnel and can longitudinally reciprocate along the travelling rail;
the door type frame is arranged and supported on the travelling device through a lifting system, and the lifting system is used for adjusting the height of the door type frame when the construction of the variable-section intermediate wall is changed;
a trapezoid rack, the bottom of which is fixed on the door frame;
one end of the rotating support adjusting component is connected to the top of the trapezoid bench;
the intermediate wall template assembly includes:
the upper template is connected with the trapezoid rack through a transverse support adjusting assembly, the top of the upper template is abutted against the tunnel vault lining and at least partially rotatably connected with the other end of the rotary support adjusting assembly, and the upper template can be turned by the rotary support adjusting assembly to be far away from the central line of the tunnel; the upper template consists of a top template and an upper template, wherein the top of the top template is abutted against the tunnel vault lining, and the bottom of the top template is hinged with the top of the upper template; the rotary support adjusting assembly comprises a first screw rod and a second screw rod, one end of the first screw rod is connected with the top of the trapezoid rack, the other end of the first screw rod is hinged with the top template, one end of the second screw rod is connected with the top of the trapezoid rack, and the other end of the second screw rod is connected with the upper template;
the top of the lower template is connected to the bottom of the upper template, and the bottom of the lower template is close to or abutted against the tunnel bottom plate; the lower template comprises a lower template and a bottom detachable template, wherein the top of the lower template is connected with the bottom of the upper template, the top of the bottom detachable template is detachably connected with the bottom of the lower template, and the bottom of the bottom detachable template is close to the tunnel bottom plate and is a preset distance away from the tunnel bottom plate.
2. The mobile template trolley system according to claim 1, wherein:
the travelling device is provided with a driving motor and at least two groups of rollers, the two groups of rollers are arranged on the travelling rail in a rolling way at two longitudinal ends of the portal frame, and the driving motor drives at least one group of rollers, so that the movable template trolley can move on the travelling rail.
3. The moving template trolley system according to claim 1 or 2, characterized in that:
the lifting system is at least two groups of lifting cylinders, the two groups of lifting cylinders are arranged at two longitudinal ends of the portal frame, one end of each lifting cylinder is supported on the walking device, and the other end of each lifting cylinder is connected with the portal frame.
4. The mobile template trolley system according to claim 1, wherein:
the door type frame comprises a plurality of groups of door type frame units, and adjacent groups of door type frame units are connected with each other through transverse connecting rods and diagonal braces;
each group of the portal frame units consists of two side upright posts and cross beams respectively connected with the two side upright posts, and the bottoms of the two side upright posts are connected with the travelling device through the lifting system; and/or
The trapezoid rack comprises a plurality of groups of trapezoid rack units, and adjacent groups of trapezoid rack units are connected through transverse connecting rods;
each group of trapezoidal rack units comprises an oblique support rod, a vertical support rod and a cross rod, wherein the oblique support rod is far away from a tunnel central line, the vertical support rod is close to the tunnel central line, the bottom ends of the oblique support rods and the bottom ends of the vertical support rods are respectively fixed on the corresponding portal frames, and the top ends of the oblique support rods and the top ends of the vertical support rods are connected into a whole through the cross rod.
5. The mobile template trolley system according to claim 1, wherein:
the transverse support adjusting assembly is provided with at least two groups, each group consists of a guide sleeve, a translation guide pillar and a translation oil cylinder, one group of guide sleeves is matched with the translation guide pillar, one end of each group of guide sleeves is connected with the trapezoid rack, the other end of each group of guide sleeves is connected with the upper template, one end of each group of translation oil cylinder is connected with the trapezoid rack, and the other end of each group of translation oil cylinder is connected with the upper template;
the two groups of transverse support adjusting assemblies are respectively connected to the upper position and the lower position of the side face of the trapezoid rack, and the translation oil cylinder is used for controlling the upper template to move towards a position close to or far from the central line of the tunnel so as to adjust the relative distance between the left intermediate wall template assembly and the right intermediate wall template assembly.
6. The mobile template trolley system according to claim 1, wherein:
and grouting holes are formed in the top template and are distributed in a linear arrangement mode.
7. The mobile template trolley system according to claim 1, wherein:
the height of the bottom detachable template is 150-210mm, and one or more blocks are arranged in the height direction.
8. The mobile template trolley system according to claim 1, wherein:
the bottom detachable template is 650mm in height and is provided with a third screw rod, one end of the third screw rod is connected with the tunnel bottom plate, and the other end of the third screw rod is hinged with the bottom detachable template.
9. The mobile template trolley system according to claim 7 or 8, wherein:
the bottom of the bottom detachable template is preset with a gap of 50mm away from the bottom plate of the tunnel.
10. A conversion construction method for construction of a partition wall in a variable-section tunnel based on the moving template trolley system according to any one of claims 1 to 9, characterized by comprising the steps of:
s10: finishing the construction of the intermediate wall in the standard section tunnel construction area;
s20: starting a translation oil cylinder and a translation guide pillar to shrink, and separating two groups of intermediate wall template components from each other in a standard section tunnel construction area;
s30: cutting off an additional structure of the template trolley, starting the lifting oil cylinder to shrink so as to restore the portal frame to a basic portal frame;
s40: starting a traveling device, and converting the movable template trolley from a standard section tunnel construction area to a variable section tunnel construction area;
s50: starting the lifting oil cylinder to extend again, lifting the foundation portal, fixing an additional structure on the portal frame and replacing the intermediate wall template assembly to form a movable template trolley system suitable for the construction of the intermediate wall in the variable-section tunnel construction area;
s60: starting the translation oil cylinder and the translation guide post to extend again, and pushing and compacting the middle wall template component;
s70: concrete pouring is carried out on the middle partition wall of the variable section tunnel construction area;
s80: and (3) removing the upper template and the lower template of the middle partition wall template assembly, and continuing pouring the next circulation middle partition wall.
CN202311223906.5A 2023-09-21 2023-09-21 Movable template trolley system for construction of partition wall in variable-section tunnel and conversion construction method Active CN116971800B (en)

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CN117449864B (en) * 2023-12-22 2024-03-05 洛阳高飞桥隧机械股份有限公司 Tunnel widening driving protection construction device and tunnel widening construction method

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KR200298103Y1 (en) * 2002-09-13 2002-12-12 주식회사 도화종합기술공사 Form structure for haunch of intermediate wall using footing concrete
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CN115030745A (en) * 2022-05-11 2022-09-09 云南交投公路建设第四工程有限公司 Inclined shaft steep slope thin-wall mid-partition wall construction trolley and construction method thereof

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