CN113669082A - Tunnel inverted arch filling construction method containing central ditch - Google Patents
Tunnel inverted arch filling construction method containing central ditch Download PDFInfo
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- CN113669082A CN113669082A CN202111056805.4A CN202111056805A CN113669082A CN 113669082 A CN113669082 A CN 113669082A CN 202111056805 A CN202111056805 A CN 202111056805A CN 113669082 A CN113669082 A CN 113669082A
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- 238000010276 construction Methods 0.000 title claims abstract description 40
- 239000004567 concrete Substances 0.000 claims abstract description 62
- 238000000034 method Methods 0.000 claims abstract description 14
- 238000009415 formwork Methods 0.000 claims description 43
- 229910000831 Steel Inorganic materials 0.000 claims description 16
- 239000010959 steel Substances 0.000 claims description 16
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 10
- 238000005192 partition Methods 0.000 claims description 7
- 239000000725 suspension Substances 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000005429 filling process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK 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
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK 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
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F16/00—Drainage
- E21F16/02—Drainage of tunnels
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Abstract
A tunnel inverted arch filling construction method containing a central ditch comprises the following steps of firstly suspending a central ditch template on an inverted arch to be constructed, wherein the central ditch template comprises a central ditch pouring cavity with a closed upper end and an open lower end, a plurality of inverted arch templates are laid between outer templates of the central ditch template and two ends of the inverted arch to be constructed, inverted arch pouring heights are reserved between the inverted arch templates and a working surface to form inverted arch pouring cavities, the inverted arch pouring cavities are communicated with the central ditch pouring cavity, concrete is poured into the inverted arch pouring cavities and the central ditch pouring cavity through an inverted arch pouring opening and the central ditch pouring opening at the same time, the inverted arch and the central ditch are poured and solidified at the same time, after the concrete is solidified, two outer templates and the inverted arch templates of the central ditch template are detached, filling concrete is poured, after the filling concrete is solidified, an inner template of the central ditch is detached, and the central ditch template is suspended, and the inverted arch and the central ditch are simultaneously poured and simultaneously solidified and formed, so that the construction procedures are reduced, and the cost is saved.
Description
Technical Field
The invention belongs to the technical field of tunnel construction, and particularly relates to a tunnel inverted arch filling construction method with a central ditch.
Background
The tunnel inverted arch filling is a key process in the field of tunnel construction, wherein C30 concrete is mostly adopted as inverted arch concrete and central ditch concrete, and C15 concrete is mostly adopted as filling concrete. The traditional tunnel construction process comprises the steps of inverted arch concrete pouring, concrete pouring and filling and central ditch concrete pouring in sequence, the step-by-step construction mode is adopted, and the construction of the next process is carried out after the concrete of the previous process is required to be formed, so that the whole construction period is long, the construction processes are multiple, the equipment and personnel investment is large, and the construction cost is high.
Disclosure of Invention
The invention aims to solve the problems of multiple filling processes, long construction period and high construction cost of an inverted arch of a tunnel with a central ditch in the prior art, and provides a filling construction method of the inverted arch of the tunnel with the central ditch. According to the method, the central ditch template is hung at the bottom of the self-propelled inverted arch trestle, inverted arch concrete and central ditch concrete are synchronously poured during construction, and then the filling concrete is poured after the outer mold is removed, so that the construction procedures are reduced, and the construction period can be greatly shortened.
The invention is realized by the following technical scheme:
a tunnel inverted arch filling construction method containing a central ditch comprises the following steps:
s1, excavating an inverted arch, namely excavating the inverted arch by using an excavator and a muck truck according to a design drawing, and excavating a working surface.
S2, measuring and paying off, binding inverted arch reinforcing steel bars to form a reinforcing steel bar arch frame, and binding central ditch template positioning ribs.
S3, suspending the central ditch template on the positioning ribs by using the positioning ribs as a reference, and reserving the height of a poured inverted arch between the bottom of the central ditch template and a working surface; the central ditch template is divided into an inner template and two outer templates, the inner template comprises an inner template bottom plate which is horizontally arranged and inner template side plates which are vertically arranged at two sides of the inner template bottom plate, the bottom end of the inner template side plate is connected with the end part of the inner template bottom plate, a plurality of supporting rod pieces are arranged between the inner template side plates, and the shape of the inner template is ensured when concrete is poured; the outer template is vertically arranged on the outer side of the inner mold side plate and forms a central ditch pouring cavity with the upper end closed and the lower end opened with the inner mold side plate; the outer formwork and the inner formwork side plate are fixed through a plurality of fixing rods, and the relative position of the outer formwork and the inner formwork side plate is kept when concrete is poured; and a central ditch pouring opening is formed in the top of the inner mold side plate.
And S4, paving a plurality of inverted arch templates between the outer template of the central ditch template and the two ends of the inverted arch to be constructed above the steel bar arch, arranging inverted arch pouring openings between the working surfaces at the two ends of the inverted arch to be constructed and the inverted arch templates, and fixing the inverted arch templates and the steel bar arch through fixing buckles. An inverted arch pouring height is reserved between the inverted arch template and the working surface to form an inverted arch pouring cavity, and the inverted arch pouring cavity is communicated with the central ditch pouring cavity.
And S5, pouring concrete, namely pouring the concrete into the inverted arch pouring cavity and the central ditch pouring cavity through the inverted arch pouring opening and the central ditch pouring opening at the same time, compacting the concrete by using a vibrator, and pouring and solidifying the inverted arch and the central ditch at the same time.
And S6, after the concrete of the inverted arch and the central ditch is solidified, removing the two outer templates and the inverted arch template of the central ditch template.
And S7, pouring and filling concrete.
And S8, after the filled concrete is solidified, removing the supporting rod piece and removing the inner mold of the central ditch template.
In the scheme, the inverted arch formwork seat comprises inverted arch formwork seats arranged at two ends of an inverted arch, an inverted arch pouring opening is formed between each inverted arch formwork seat and a working surface, a driving device is arranged on each inverted arch formwork seat, the driving device is connected with the inverted arch formwork through a connecting piece, and the driving device can drive the inverted arch formwork to electrically lift.
In the above solution, the driving device is a winch.
In the scheme, the inverted arch template comprises a side inverted arch template and a top inverted arch template, the side inverted arch template is hinged to the inverted arch template seat, and a plurality of top inverted arch templates are arranged between the central ditch template and the side inverted arch template.
In the above scheme, the inverted arch template includes first inverted arch template and second inverted arch template, and the head end of first inverted arch template is articulated to inverted arch template seat, and first inverted arch template tail end articulates second inverted arch template head end.
In the scheme, the pouring window is arranged on the top inverted arch template, the partition plate is arranged on the pouring window, the inverted arch pouring opening, the central ditch pouring opening and the pouring window are simultaneously poured, concrete is poured into the inverted arch pouring cavity, and the partition plate is covered after pouring is finished, so that the inverted arch is formed.
In the scheme, the self-propelled trestle in the tunnel is used for suspending the hanging chain and hoisting the central ditch template.
In the above scheme, the support rod is a support screw rod, and the fixing rod is a counter-pull screw rod.
In the above scheme, the inner mold side plate is an L-shaped inner mold side plate, the outer mold plate and the L-shaped inner mold side plate form a central ditch pouring cavity with a closed upper end and an open lower end, and a central ditch pouring opening is formed in the top end of the L-shaped inner mold side plate.
In the above scheme, first invert template and second invert template be provided with the lug, and the lug passes through the steel wire stay cord to be connected with the hoist engine at invert template seat top, and the first invert template of hoist engine drive and second invert template rotate around the articulated shaft to realize the electric lift of first invert template and second invert template.
The invention has the advantages and beneficial effects that:
1. according to the tunnel inverted arch filling construction method with the central ditch, the inverted arch and the central ditch are simultaneously poured and simultaneously solidified and formed in a mode of suspending the central ditch template, so that the construction procedures are reduced, and the cost is saved.
2. In tunnel construction, self-propelled landing stage is the necessary equipment that the tunnel invert was pour, suspends central ditch template in midair through self-propelled landing stage, does not additionally increase building equipment and time limit for a project, does not additionally increase the cost.
Drawings
FIG. 1 is a schematic perspective view of the inverted arch filling construction method for a tunnel with a central ditch according to the present invention.
FIG. 2 is a partial enlarged view of a central ditch formwork of the tunnel invert filling construction method including the central ditch.
Fig. 3 is a schematic perspective view of the inverted arch filling construction method of the tunnel with the central ditch.
Fig. 4 is a schematic perspective view of the inverted arch filling construction method of the tunnel with the central ditch.
Fig. 5 is a schematic perspective view of the inverted arch filling construction method of the tunnel with the central ditch.
Wherein:
1: working face, 12: inverted arch, 2: inverted arch form holder, 21: winch, 3: inverted arch pouring opening, 4: inverted arch form, 41: side inverted arch form, 42: first inverted arch form, 43: second inverted arch form, 5: self-propelled landing stage, 6: suspension sling chain, 7: center gutter template, 71: inner mold, 72: outer template, 73: inner mold bottom plate, 74: inner mold side plate, 75: support bar, 76: central gutter casting cavity, 77: fixing rod, 78: mouth is pour to central ditch, 8: top inverted arch form, 81: pouring a window, 82: a separator.
For a person skilled in the art, other relevant figures can be obtained from the above figures without inventive effort.
Detailed Description
In order to make the technical solution of the present invention better understood, the technical solution of the present invention is further described below with reference to specific examples.
Example one
Referring to the attached figures 1-2, the tunnel inverted arch filling construction method with the central ditch comprises the following steps:
s1, excavating an inverted arch, namely excavating the inverted arch by using an excavator and a muck truck according to a design drawing, and excavating a working surface.
S2, measuring and paying off, binding inverted arch reinforcing steel bars to form a reinforcing steel bar arch frame (steel bar arch frame is not shown in the drawing), and binding the central ditch template positioning bars.
S3, suspending a central ditch template 7 on a positioning rib through a self-propelled trestle 5 positioned above an inverted arch 12 to be poured in the tunnel by taking the positioning rib as a reference and relying on a suspension chain 6, and reserving the height of the poured inverted arch 12 between the bottom of the central ditch template 7 and the working surface 1; the central ditch template 7 is divided into an inner model 71 and two outer templates 72, the inner model 71 comprises an inner model bottom plate 73 arranged horizontally and inner model side plates 74 vertically arranged at two sides of the inner model bottom plate 73, the inner model side plates 74 are L-shaped inner model side plates, the bottom ends of the inner model side plates are connected with the end parts of the inner model bottom plate 73, a plurality of supporting rod pieces 75 are arranged between the inner model side plates 74, the supporting rod pieces 75 preferably support a screw rod, and the shape of the inner model 71 is ensured when concrete is poured; the outer template 72 is vertically arranged on the outer side of the inner mold side plate 74, and forms a central ditch pouring cavity 76 with a closed upper end and an open lower end with the inner mold side plate 74; further, the outer formwork 72 and the inner formwork side plate 74 are fixed by a plurality of fixing rods 77, and the fixing rods 77 are preferably split screws for keeping the relative positions of the outer formwork 72 and the inner formwork side plate 74 when concrete is poured; further, a central gutter pouring opening 78 is formed at the top of the inner mold side plate 74.
S4, a plurality of inverted arch templates 4 are laid between the outer template 72 of the central ditch template 7 and the two ends of the inverted arch 12 to be constructed above the steel bar arch, inverted arch pouring openings 3 are formed between the working surfaces of the two ends of the inverted arch 12 to be constructed and the inverted arch templates 4, and the inverted arch templates 4 are fixed with the steel bar arch through fixing buckles so as to prevent the inverted arch templates 4 from floating upwards when concrete is poured. An inverted arch 12 pouring height is reserved between the inverted arch formwork 4 and the working surface 1 to form an inverted arch pouring cavity, and the inverted arch pouring cavity is communicated with the central ditch pouring cavity 76.
And S5, pouring concrete, namely pouring the concrete into the inverted arch pouring cavity and the central ditch pouring cavity 76 through the inverted arch pouring opening 3 and the central ditch pouring opening 78 at the same time, compacting the concrete by using a vibrator, and pouring and solidifying the inverted arch 12 and the central ditch at the same time, so that the working procedure is shortened, and the working time and the cost are saved.
S6, after the inverted arch 12 and the central ditch concrete are solidified, two outer templates 72 of the central ditch template 7 and the inverted arch template 4 are dismantled.
S7, pouring and filling concrete, wherein the inner mold 71 of the central ditch template 7 is not detached, and the central ditch entity can be well supported.
And S8, after the filled concrete is solidified, removing the supporting screw rod, and removing the inner mold 71 of the central ditch template 7.
Example two
Referring to the attached figures 2-3, the tunnel inverted arch filling construction method with the central ditch comprises the following steps:
s1, excavating an inverted arch, namely excavating the inverted arch by using an excavator and a muck truck according to a design drawing, and excavating a working surface.
S2, measuring and paying off, binding inverted arch reinforcing steel bars to form a reinforcing steel bar arch frame (steel bar arch frame is not shown in the drawing), binding a central ditch template positioning bar, suspending a central ditch template 7 on the positioning bar by using the positioning bar as a reference and relying through a suspension chain 6 through a self-propelled trestle 5 positioned above an inverted arch 12 in the tunnel, and reserving the height for pouring the inverted arch 12 between the bottom of the central ditch template 7 and the working surface 1; the central ditch template 7 is divided into an inner model 71 and two outer templates 72, the inner model 71 comprises an inner model bottom plate 73 arranged horizontally and inner model side plates 74 vertically arranged at two sides of the inner model bottom plate 73, the inner model side plates 74 are L-shaped inner model side plates, the bottom ends of the inner model side plates are connected with the end parts of the inner model bottom plate 73, a plurality of supporting rod pieces 75 are arranged between the inner model side plates 74, the supporting rod pieces 75 preferably support lead screws, and the shape of the inner model 71 is ensured when concrete is poured; the outer template 72 is vertically arranged on the outer side of the inner mold side plate 74, and forms a central ditch pouring cavity 76 with a closed upper end and an open lower end with the inner mold side plate 74; further, the outer formwork 72 and the inner formwork side plate 74 are fixed by a plurality of fixing rods 77, and the fixing rods 77 are preferably split screws for keeping the relative positions of the outer formwork 72 and the inner formwork side plate 74 when concrete is poured; further, a central gutter pouring opening 78 is formed at the top of the inner mold side plate 74.
S3, inverted arch template seats 2 are fixed on working surfaces 1 at two ends of an inverted arch 12, an inverted arch pouring opening 3 is formed between each inverted arch template seat and the working surface, an inverted arch template 4 is arranged between a central inverted arch template 7 and the inverted arch template seat 2, the inverted arch template 4 comprises a side inverted arch template 41 and a top inverted arch template 8, lifting lugs are arranged on the side inverted arch template 41 and are connected with a winch 21 at the top of the inverted arch template seat 2 through steel wire pull ropes, and the side inverted arch template 41 is driven to rotate around a hinged shaft through the winch 21 so as to realize electric lifting of the side inverted arch template 41; the side inverted arch formwork 41 is lowered to a set pouring position, an inverted arch pouring height is reserved between the side inverted arch formwork 41 and the working surface, the side inverted arch formwork 41 is fixed with a steel bar arch frame through a fixing buckle, the position of the side inverted arch formwork 41 is fixed, and the side inverted arch formwork 41 is prevented from floating upwards when concrete is poured.
S4, paving a plurality of detachable top inverted arch formworks 8 between the side inverted arch side formworks 41 and the bottom ends of the outer formworks 72 of the central ditch formwork 7, wherein the top inverted arch formworks 8 are fixed with a steel bar arch frame through fixing buckles, an inverted arch pouring cavity is formed between each top inverted arch formwork 8 and the corresponding side inverted arch formwork 41 and the corresponding working face 1, and the inverted arch pouring cavity is communicated with the central ditch pouring cavity 76.
And S5, pouring concrete, namely pouring the concrete into the inverted arch pouring cavity and the central ditch pouring cavity 76 through the inverted arch pouring opening 3 and the central ditch pouring opening 78 at the same time, compacting the concrete by using a vibrator, and pouring and solidifying the inverted arch 12 and the central ditch at the same time, so that the working procedure is shortened, and the working time and the cost are saved.
S6, after the concretes of the inverted arches and the central ditch are solidified, two outer templates 72 of the central ditch template 7 and the top inverted arch template 8 are detached, and the side inverted arch templates 41 are driven by the winch 21 to rotate around the hinge shaft to turn upwards.
S7, pouring and filling concrete, wherein the inner mold 71 of the central ditch template 7 is not detached, and the central ditch entity can be well supported.
And S8, after the filled concrete is solidified, removing the supporting screw rod, and removing the inner mold 71 of the central ditch template 7.
Further, a pouring window 81 can be formed in the top inverted arch formwork 8, and a partition 82 is disposed on the pouring window 81. When the inverted arch is subjected to concrete pouring, the partition plate 82 is opened, and pouring is simultaneously carried out from the inverted arch pouring opening 3 and the pouring window 81 of the top inverted arch template 8, so that the problem of incomplete pouring in the pouring process is prevented, and the partition plate 82 is closed after the pouring is finished.
EXAMPLE III
Referring to the attached figures 2, 4 and 5, the tunnel inverted arch filling construction method with the central ditch comprises the following steps:
s1, excavating an inverted arch, namely excavating the inverted arch by using an excavator and a muck truck according to a design drawing, and excavating a working surface.
S2, measuring and paying off, binding inverted arch reinforcing steel bars to form a reinforcing steel bar arch frame (steel bar arch frame is not shown in the drawing), binding a central ditch template positioning bar, suspending a central ditch template 7 on the positioning bar by using the positioning bar as a reference and relying through a suspension chain 6 through a self-propelled trestle 5 positioned above an inverted arch 12 in the tunnel, and reserving the height for pouring the inverted arch 12 between the bottom of the central ditch template 7 and the working surface 1; the central ditch template 7 is divided into an inner model 71 and two outer templates 72, the inner model 71 comprises an inner model bottom plate 73 arranged horizontally and inner model side plates 74 vertically arranged at two sides of the inner model bottom plate 73, the inner model side plates 74 are L-shaped inner model side plates, the bottom ends of the inner model side plates are connected with the end parts of the inner model bottom plate 73, a plurality of supporting rod pieces 75 are arranged between the inner model side plates 74, the supporting rod pieces 75 preferably support lead screws, and the shape of the inner model 71 is ensured when concrete is poured; the outer template 72 is vertically arranged on the outer side of the inner mold side plate 74, and forms a central ditch pouring cavity 76 with a closed upper end and an open lower end with the inner mold side plate 74; further, the outer formwork 72 and the inner formwork side plate 74 are fixed by a plurality of fixing rods 77, and the fixing rods 77 are preferably split screws for keeping the relative positions of the outer formwork 72 and the inner formwork side plate 74 when concrete is poured; further, a central gutter pouring opening 78 is formed at the top of the inner mold side plate 74.
S3, inverted arch template seats 2 are fixed on working surfaces at two ends of an inverted arch 12, an inverted arch pouring opening 3 is formed between the inverted arch template seats and a central ditch template, inverted arch templates 4 are arranged between the inverted arch template seats and the central ditch template, the inverted arch template seats 2 are hinged with the inverted arch templates 4, each inverted arch template 4 comprises a first inverted arch template 42 and a second inverted arch template 43, the head end of each first inverted arch template 42 is hinged with the inverted arch template seat 2, the tail end of each first inverted arch template 42 is hinged with the head end of each second inverted arch template 43, lifting lugs are arranged at the tail ends of the first inverted arch template 42 and the second inverted arch template 43 and are connected with a winch 21 at the top of the inverted arch template seats 2 through steel wires, the winch 21 drives the first inverted arch template 42 and the second inverted arch template 43 to rotate around a hinged shaft (refer to the attached figures 4-5) so as to realize the electric lifting of the first inverted arch template 42 and the second inverted arch template 43, the first inverted arch template 42 and the second inverted arch template 43 are placed to a set pouring position, and the first inverted arch template 42 and the second inverted arch template 43 are fixed with the steel bar arch frame through the fixing buckles, so that the positions of the first inverted arch template 42 and the second inverted arch template 43 are fixed, the first inverted arch template 42 and the second inverted arch template 43 are prevented from floating upwards when concrete is poured, inverted arch pouring heights are reserved between the first inverted arch template 42 and the second inverted arch template 43 and a working surface, an inverted arch pouring cavity is formed, and the inverted arch pouring cavity is communicated with the central ditch pouring cavity 76.
S4, pouring concrete, namely pouring the concrete into the inverted arch pouring cavity and the central ditch pouring cavity 76 through the inverted arch pouring opening 3 and the central ditch pouring opening 78 at the same time, using a vibrator to compact the concrete, and pouring and solidifying the inverted arch 12 and the central ditch at the same time, so that the working procedure is shortened, and the working time and the cost are saved
And S5, after the concretes of the inverted arches and the central ditch are solidified, detaching the two outer templates 72 of the central ditch template 7, and turning up the first inverted arch template 42 and the second inverted arch template 43 through a winch for collection.
S6, pouring and filling concrete, wherein the inner mold 71 of the central ditch template 7 is not detached, and the central ditch entity can be well supported.
And S7, after the filled concrete is solidified, removing the supporting screw rod, and removing the inner mold 71 of the central ditch template 7.
The invention has been described by way of example, and it is to be understood that any simple variation, modification or equivalent replacement by a person skilled in the art without inventive step falls within the scope of protection of the present invention without departing from the core of the present invention.
Claims (10)
1. A tunnel inverted arch filling construction method containing a central ditch is characterized by comprising the following steps:
s1, excavating an inverted arch, namely excavating the inverted arch by using an excavator and a muck truck according to a design drawing, and excavating a working surface;
s2, measuring and paying off, binding inverted arch reinforcing steel bars to form a reinforcing steel bar arch frame, and binding central ditch template positioning ribs;
s3, suspending the central ditch template on the positioning ribs by using the positioning ribs as a reference, and reserving the height of a poured inverted arch between the bottom of the central ditch template and a working surface; the central ditch template is divided into an inner template and two outer templates, the inner template comprises an inner template bottom plate which is horizontally arranged and inner template side plates which are vertically arranged at two sides of the inner template bottom plate, the bottom end of the inner template side plate is connected with the end part of the inner template bottom plate, a plurality of supporting rod pieces are arranged between the inner template side plates, and the shape of the inner template is ensured when concrete is poured; the outer template is vertically arranged on the outer side of the inner mold side plate and forms a central ditch pouring cavity with the upper end closed and the lower end opened with the inner mold side plate; the outer formwork and the inner formwork side plate are fixed through a plurality of fixing rods, and the relative position of the outer formwork and the inner formwork side plate is kept when concrete is poured; a central ditch pouring opening is formed in the top of the inner mold side plate;
s4, paving a plurality of inverted arch templates between the outer template of the central ditch template and two ends of an inverted arch to be constructed above the steel bar arch, arranging inverted arch pouring openings between working surfaces at two ends of the inverted arch to be constructed and the inverted arch templates, and fixing the inverted arch templates and the steel bar arch through fixing buckles; an inverted arch pouring height is reserved between the inverted arch template and the working surface to form an inverted arch pouring cavity, and the inverted arch pouring cavity is communicated with the central ditch pouring cavity;
s5, pouring concrete, namely pouring the concrete into an inverted arch pouring cavity and a central ditch pouring cavity through an inverted arch pouring opening and a central ditch pouring opening at the same time, compacting the concrete by using a vibrator, and pouring and solidifying the inverted arch and the central ditch at the same time;
s6, after the concrete of the inverted arch and the central ditch is solidified, removing two outer templates and an inverted arch template of the central ditch template;
s7, pouring and filling concrete;
and S8, after the filled concrete is solidified, removing the supporting rod piece and removing the inner mold of the central ditch template.
2. The inverted arch filling construction method for a tunnel including a central gutter according to claim 1, comprising inverted arch form bases provided at both ends of the inverted arch, an inverted arch placing opening provided between the inverted arch form base and the working surface, and a driving device provided on the inverted arch form base, the driving device being connected to the inverted arch form via a connecting member, and being capable of driving the inverted arch form to electrically ascend and descend.
3. The inverted arch filling construction method for a tunnel including a central gutter according to claim 2, wherein the driving means is a hoist.
4. The inverted arch filling construction method for a tunnel including a central gutter according to claim 2, wherein the inverted arch forms include side inverted arch forms and top inverted arch forms, the side inverted arch forms are hinged to the inverted arch form base, and a plurality of top inverted arch forms are provided between the central gutter form and the side inverted arch forms.
5. The inverted arch filling construction method for a tunnel including a central gutter according to claim 2, wherein the inverted arch form includes a first inverted arch form and a second inverted arch form, a seat of the inverted arch form is hinged to a head end of the first inverted arch form, and a tail end of the first inverted arch form is hinged to a head end of the second inverted arch form.
6. The method for filling and constructing an inverted arch of a tunnel with a central gutter as claimed in claim 4, wherein a pouring window is provided on the top inverted arch formwork, a partition is provided on the pouring window, concrete is poured into the inverted arch pouring chamber through the inverted arch pouring port, the central gutter pouring port and the pouring window at the same time, and the partition is covered after the pouring is completed to form the inverted arch.
7. The inverted arch filling construction method for the tunnel with the central ditch as claimed in claim 1, wherein the central ditch formwork is hoisted by suspending a hoist chain through a self-propelled trestle in the tunnel.
8. The inverted arch filling construction method for a tunnel with a central gutter as claimed in claim 1, wherein the support rod member is a support screw rod, and the fixing rod is a counter-pulling screw rod.
9. The filling construction method for the inverted arch of the tunnel with the central ditch as claimed in claim 1, wherein the inner mold side plate is an L-shaped inner mold side plate, the outer mold plate and the L-shaped inner mold side plate form a central ditch pouring chamber with a closed upper end and an open lower end, and the top end of the L-shaped inner mold side plate is provided with a central ditch pouring opening.
10. The inverted arch filling construction method for the tunnel with the central ditch as claimed in claim 5, wherein the first inverted arch form and the second inverted arch form are provided with lifting lugs, the lifting lugs are connected with a winch at the top of the inverted arch form base through steel wire pulling ropes, and the winch drives the first inverted arch form and the second inverted arch form to rotate around the hinge shaft.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115405334A (en) * | 2022-10-21 | 2022-11-29 | 中铁隧道局集团有限公司 | Construction method for on-site forming of central ditch of highway tunnel |
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| WO2020253001A1 (en) * | 2019-06-19 | 2020-12-24 | 中铁十九局集团第六工程有限公司 | Two-step fast closed tunnel support structure having inverted arch and construction method therefor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115405334A (en) * | 2022-10-21 | 2022-11-29 | 中铁隧道局集团有限公司 | Construction method for on-site forming of central ditch of highway tunnel |
| CN115405334B (en) * | 2022-10-21 | 2024-06-04 | 中铁隧道局集团有限公司 | Construction method for on-site forming of central ditch of highway tunnel |
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