CN113622328A - Box culvert construction assembly, application thereof and box culvert construction method - Google Patents
Box culvert construction assembly, application thereof and box culvert construction method Download PDFInfo
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- CN113622328A CN113622328A CN202110980183.8A CN202110980183A CN113622328A CN 113622328 A CN113622328 A CN 113622328A CN 202110980183 A CN202110980183 A CN 202110980183A CN 113622328 A CN113622328 A CN 113622328A
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- 238000010276 construction Methods 0.000 title claims abstract description 146
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 143
- 239000010959 steel Substances 0.000 claims abstract description 143
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- 239000004567 concrete Substances 0.000 claims description 46
- 238000000034 method Methods 0.000 claims description 34
- 230000008569 process Effects 0.000 claims description 32
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- 238000003466 welding Methods 0.000 claims description 20
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- 230000032798 delamination Effects 0.000 claims description 2
- 238000009434 installation Methods 0.000 abstract description 23
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
- E01F5/00—Draining the sub-base, i.e. subgrade or ground-work, e.g. embankment of roads or of the ballastway of railways or draining-off road surface or ballastway drainage by trenches, culverts, or conduits or other specially adapted means
- E01F5/005—Culverts ; Head-structures for culverts, or for drainage-conduit outlets in slopes
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Abstract
The invention discloses a box culvert construction assembly, application thereof and a box culvert construction method, and belongs to the technical field of buildings. The assembly comprises a full support, a support beam, a plurality of steel templates, a pulley and a slide rail; the steel templates are used for assembling a box culvert inner mould frame matched with a preset box culvert in shape, and the full framing is erected in the box culvert inner mould frame and connected with the inner wall of each steel template; a supporting beam is vertically connected with the top of the full-space support and is simultaneously connected with the steel template, the sliding rail is laid at the bottom of the full-space support along the length direction of the culvert of the preset box culvert, and the pulley is connected with the supporting beam and is used for sliding along the sliding rail. Through adopting above-mentioned box culvert construction subassembly to carry out box culvert construction, the centre form needs many times to dismantle among the can effectively avoiding prior art and assembles, leads to the transport installation unchangeable, steel template warp and wooden template breakage scheduling problem, is favorable to reducing construction cost and improving the efficiency of construction when guaranteeing construction quality.
Description
Technical Field
The invention relates to the technical field of buildings, in particular to a box culvert construction assembly, application thereof and a box culvert construction method.
Background
The box culvert refers to a culvert built by reinforced concrete box pipe joints. The box culvert is made of one or more square or rectangular sections, typically of reinforced concrete or masonry.
The box culvert construction generally adopts cast-in-place, sets up the bottom in the slot that excavates, pours a layer concrete bed course, with the on-the-spot ligature of reinforcing bar that processes again, props up centre form and external mold, and great box culvert generally pours the latter half of bottom plate and lateral wall earlier, and ligature lateral wall upper portion and roof reinforcing bar again prop up interior outer mold, pours lateral wall upper portion and roof. And (5) removing the formwork when the concrete reaches the strength required by the design, and backfilling the soil on the two sides of the box culvert.
Traditional box culvert construction technology is in the work progress, and the centre form can't be avoided mostly to dismantle the assembly many times, has the transport installation inconvenient, steel template warp, wooden template breakage scheduling problem.
In view of this, the invention is particularly proposed.
Disclosure of Invention
It is an object of the present invention to provide a box culvert construction assembly that overcomes at least one of the above problems.
The second purpose of the present invention is to provide an application of the box culvert construction assembly.
The invention also aims to provide a box culvert construction method for construction by adopting the box culvert construction assembly.
The application can be realized as follows:
in a first aspect, the application provides a box culvert construction assembly, which comprises a full framing, a support beam, a plurality of steel templates, pulleys and a slide rail;
the steel templates are used for assembling a box culvert inner mould frame matched with a preset box culvert in shape, and the full framing is erected in the box culvert inner mould frame and connected with the inner wall of each steel template; a supporting beam is vertically connected to the top of the full-space support and is simultaneously connected with the steel template, the sliding rail is laid at the bottom of the full-space support along the length direction of the culvert of the preset box culvert, and the pulley is connected with the supporting beam and is used for sliding on the sliding rail.
In an alternative embodiment, all two connected steel templates are connected in a bolting mode;
or the steel template is connected with the full framing in a jacking mode;
or the supporting beam and the steel template are fixed by welding;
or the pulley and the supporting beam are connected in a bolt connection mode.
In an optional embodiment, the steel template has a thickness of 40-45cm and a span of no more than 24 m;
or the supporting beam is formed by double-spliced 14-channel steel.
In an optional embodiment, when the vertical rod longitudinal distance of the full-hall support is 115-125cm, the transverse distance is 115-125cm, the horizontal step distance does not exceed 90cm, and the clear height is greater than 6m, the box culvert construction assembly further comprises horizontal cross braces arranged in the upper area and the lower area of the full-hall support.
In an optional embodiment, the number of the slide rails is multiple, the slide rails are arranged at intervals in the width direction, and the distance between every two adjacent slide rails is 1.5-2.5 m.
In an alternative embodiment, the slide rail is formed from 16 gauge steel.
In an optional embodiment, the number of the pulleys is also multiple, each sliding rail is correspondingly provided with a plurality of pulleys arranged at intervals, and the distance between every two adjacent pulleys is 3.5-4.5 m.
In an alternative embodiment, the pulley is a directional pulley.
In an alternative embodiment, the box culvert construction assembly further comprises a mechanical hydraulic device for driving the pulleys to slide.
In an alternative embodiment, the mechanical hydraulic device is a jack.
In an optional embodiment, the box culvert construction assembly further comprises a foam plate for filling a gap between the contact surface of the box culvert inner mould frame and the concrete foundation; more preferably, the foam sheet has a thickness of 18-22 mm.
In an optional embodiment, the box culvert construction assembly further comprises a winch or a chain block for pulling the full framing and the formwork to slide out integrally.
In an optional embodiment, the box culvert construction assembly further comprises a crane for hoisting and transporting the full framing and the formwork integrally.
In a second aspect, the present application provides the use of a box culvert construction assembly according to any one of the preceding embodiments in box culvert construction.
In a third aspect, the present application provides a box culvert construction method, including the following steps: after the culvert body reinforcing steel bars are embedded and installed, the box culvert construction assembly is adopted to assist in carrying out box culvert construction according to any one of the above embodiments, and after the box culvert is formed, the box culvert construction assembly is removed.
In an alternative embodiment, removing the box culvert construction assembly comprises: and integrally removing the steel formwork and the full framing in a drawing mode.
In an optional implementation mode, before the embedding and the installation of the culvert body steel bars, the method further comprises the step of welding the steel bar combined framework.
In an alternative embodiment, the welding is performed by double overlap arc welding.
In an alternative embodiment, the overlap length is no less than 5 times the diameter of the rebar.
In an optional implementation mode, the box culvert construction process comprises pouring box culvert wall bodies and roof concrete, and the pouring is in a symmetrical layered pouring mode.
In an alternative embodiment, the delamination thickness is no greater than 30 cm.
The beneficial effect of this application includes:
through set up full hall support in the moulding frame and with the interior wall connection of each steel form in the box culvert, be connected with the steel form simultaneously through a supporting beam longitudinal connection in full hall support's top, the slide rail is laid and the pulley of being connected simultaneously is set up with slide rail and supporting beam to full hall support's bottom, the whole pull of box culvert centre form is realized in the slip of accessible pulley in the slide rail, it needs the dismantlement to assemble many times to effectively avoid the centre form among the prior art, it is unchangeable to lead to the transport installation, steel form warp and the broken scheduling problem of wooden template, be favorable to reducing construction cost and improving the efficiency of construction when guaranteeing construction quality.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic view of a box culvert construction assembly provided by the present application during concrete pouring and molding;
FIG. 2 is a partial schematic view of a box culvert construction assembly as the formwork is removed according to the present application;
fig. 3 to 18 are construction site diagrams in application examples of the present application.
Icon: 1-full support; 2-steel moulding plate; 3-a support beam; 4-a slide rail; 5-mechanical hydraulic means; 7-a foam board; 6-pulley.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.
The box culvert construction assembly provided by the application, the application thereof and the box culvert construction method are specifically explained below.
The application provides a box culvert construction assembly, please refer to fig. 1 and fig. 2, which includes a full support 1, a support beam 3, a plurality of steel templates 2, a pulley 6 and a slide rail 4;
the steel templates 2 are used for assembling a box culvert inner mould frame matched with a preset box culvert shape, and the full framing 1 is erected in the box culvert inner mould frame and connected with the inner wall of each steel template 2; supporting beam 3 longitudinal connection is connected with steel form 2 simultaneously in the top of full hall support 1, and slide rail 4 lays in the bottom of full hall support 1 along the length direction of the culvert of predetermineeing the box culvert, and pulley 6 is connected with supporting beam 3 and is used for sliding along slide rail 4.
In an alternative embodiment, all two connected steel templates 2 are connected in a bolting mode; the steel moulding plate 2 is connected with the full framing 1 in a jacking mode; the supporting beam 3 and the steel template 2 are fixed by welding; the pulley 6 is connected with the support beam 3 by adopting a bolt connection mode.
The cross distance, the longitudinal distance and the horizontal rod distance of the erected rods of the full support 1 can be adjusted according to the thickness of the top plate of the box culvert and the load borne by the support by referring to the relevant contents of road and bridge construction calculation manual.
In some embodiments, the steel form 2 may have a thickness of 40-45cm (e.g., 40cm, 41cm, 42cm, 43cm, 44cm, or 45cm, etc.) and a span of up to 1-6 x 4m (i.e., no more than 24 m). When the vertical rod longitudinal distance of the full hall support 1 is 115-125cm (such as 120cm), the transverse distance is 115-125cm (such as 120cm), the horizontal step distance does not exceed 90cm, and the clear height is greater than 6m, the box culvert construction assembly further comprises horizontal cross braces (not shown) arranged in the upper area (which can be understood as the top layer of the support) and the lower area (which can be understood as the bottom layer of the support) of the full hall support 1.
It should be noted that the support beam 3 referred to in the present application may be formed of double-spliced 14 channel steel, and that other suitable materials are not excluded.
In an alternative embodiment, the number of the slide rails 4 is multiple, the plurality of slide rails 4 are arranged at intervals in the width direction, and the distance between every two adjacent slide rails 4 may be 1.5-2.5m (e.g., 2 m). The slide 4 may, by reference, be formed of channel 16, and similarly, other suitable materials are not excluded.
Preferably, the number of the pulleys 6 can also be set to be multiple, each slide rail 4 is correspondingly provided with a plurality of pulleys 6 arranged at intervals, and the distance between every two adjacent pulleys 6 can be 3.5-4.5m (such as 3 m).
In an alternative embodiment, the pulley 6 is a directional pulley.
Further, the box culvert construction assembly may further include a mechanical hydraulic device 5, such as a jack, for driving the pulley 6 to slide.
Further, the box culvert construction assembly can also comprise a foam plate 7 for filling a gap between the contact surface of the box culvert inner mould frame and the concrete foundation. The foam sheet 7 may, by reference, have a thickness of 18-22mm (e.g. 20 mm).
Further, the box culvert construction assembly further comprises a winch (not shown) or a chain block (not shown) for pulling the full support 1 and the formwork to integrally slide out, and a crane (not shown) for hoisting and transporting the full support 1 and the formwork integrally.
Bear, through set up full hall support 1 in the die frame in the box culvert and with each steel form 2's inner wall connection, simultaneously through supporting beam 3 longitudinal connection in full hall support 1's top and simultaneously with steel form 2 be connected, slide rail 4 is laid and set up the pulley 6 of being connected with slide rail 4 and supporting beam 3 simultaneously to full hall support 1's bottom, the whole pull of accessible pulley 6 slip realization box culvert centre form in slide rail 4, effectively avoid the centre form to need dismantle many times among the prior art and assemble, lead to the transport installation unchangeable, the steel form warp and the broken scheduling problem of wooden template, be favorable to reducing construction cost and improving the efficiency of construction when guaranteeing construction quality.
Correspondingly, the application provides the application of the box culvert construction assembly in the construction of the box culvert, and particularly the box culvert construction assembly is used for the construction of the box culvert with large box culvert quantity and small span and end face size change.
In addition, the application also provides a box culvert construction method, which comprises the following steps: after the culvert body reinforcing steel bars are embedded and installed, the box culvert construction assembly is adopted to assist in carrying out box culvert construction, and after the box culvert is formed, the box culvert construction assembly is removed.
Wherein, remove box culvert construction components and include: and integrally removing the steel formwork 2 and the full-space bracket 1 in a drawing mode.
Referring to fig. 3, the box culvert construction method provided by the present application includes the following processes: the construction method comprises the following steps of construction preparation (pre-embedding and installing of culvert foundation, bottom plate steel bars and culvert body steel bars), installation and adjustment of an integral inner mold and supports, installation of culvert body outer molds and top plate steel bars, pouring of top plates and culvert body concrete, dismantling of inner and outer templates and supports, and next process.
Wherein the construction preparation may include:
before construction, according to the section size of the box culvert, special-shaped templates such as a customized chamfer angle and an oblique crossing plug are machined, the rest positions are only required to be 900 multiplied by 1500 common flat molds, if the conditions are mature, the inner mold can be machined and customized according to the section size of the box culvert, and an adjusting block is configured. The material of the full support 1 is ordinary steel pipe, and the walking pulley is driven by a customized mechanical hydraulic device 5. And (4) assembling the templates after the support is erected, wherein the templates are assembled into a rectangle and form a whole with the support. The integral inner die adopts a common steel pipe full support 1+ double-spliced [14 channel steel supporting beam 3+ steel form 2+ traveling pulley + [16 channel steel sliding rail 4 combination system, and the connection among all the components is carried out by adopting modes such as welding, bolting, shoring and the like, so that the firm and reliable connection among the combination systems is ensured.
The foundation steel bars are manufactured and pulled to a construction site by a steel bar processing site in a unified mode, and the foundation steel bars are bound strictly according to the size of a construction drawing. And (3) popping up a steel bar position line on the surface of the cushion concrete by using an ink line before construction, binding the steel bar strictly operating according to the construction technical specification, welding the steel bar combined framework by adopting double-sided lap joint electric arc welding, wherein the lap joint length is not less than 5 times of the diameter of the steel bar. And (5) paying attention to the accuracy of the position of the steel bar and the thickness of the protective layer during steel bar binding.
Before pouring the foundation concrete, checking whether the template is stable and reliable, pouring the concrete layer by layer according to a certain thickness (generally not more than 30cm) sequence and direction, and finishing pouring the upper-layer concrete before initial setting of the lower-layer concrete.
The culvert body reinforcing steel bars are embedded before the foundation concrete is poured, and temporary molds (simple clamping distances) are used for binding the reinforcing steel bars, so that accurate embedded sizes are ensured. And (4) binding the steel bars according to the drawing requirements and the types, the number, the inside and the outside of the steel bars, wherein the binding is never allowed to occur. The steel bars are disordered inside and outside, the binding and connection of the steel bars are firm without slippage, and the directions of the steel bar hooks are consistent and can not fall to one side. The concrete cushion blocks of the reinforcing steel bar protective layer are staggered and arranged between the reinforcing steel bars and the template in a scattered manner. The steel bar joints are staggered in the same section, and the number of the steel bar joints is not more than 1/2 of the number of the steel bars.
The mounting and adjustment of the integral inner mold and the support may include:
after the strength of the foundation concrete reaches 85%, erecting an internal mold support; the full hall support 1 is set up the pole setting horizontal distance, vertical distance and horizon bar interval and is thick different according to the box culvert top board, and the support bears the load difference and adjusts. When the vertical and transverse distances of the vertical rods of the full support 1 are 120cm multiplied by 120cm, the maximum horizontal step distance is 90cm, and the clear height is more than 6m, the top layer and the bottom layer of the support are provided with horizontal cross braces.
After the support is erected, integral template assembly is carried out, the templates are connected with one another in a bolted mode, and the templates and the support are supported in a supporting mode; the double-spliced [14 channel steel longitudinal supporting beam 3 and the template are welded and fixed, and the directional pulley and the top longitudinal supporting beam 3 are bolted, so that the directional pulley and the template support system form a whole in the sliding process. The directional pulley walking [16 channel steel is laid along the culvert length direction, and the portable drill is used for drilling holes to fix the left and right sides, so that the channel steel is prevented from deviating in the left and right directions under the load action.
After the formwork support system is installed, the contact surface of the inner mold and the concrete foundation is filled with joints by adopting a foam plate 7 with the thickness of 18-22mm, and certain construction gaps are reserved for the subsequent formwork dismantling process while slurry leakage is avoided. And adjusting the heights of the pulleys 6 and the jack by taking the elevation of the top die as a reference so as to enable each pulley 6 to be uniformly stressed. The lifting directional pulleys are in a stressed state, and wood wedges are adopted for fixing the front and the rear of the pulleys 6, so that the displacement of the templates in the side wall and top plate concrete pouring process is prevented.
The external mold of culvert body and roof reinforcing bar installation can include:
roof reinforcing bar unloading preparation, ligature are gone on according to the design drawing equally, carry out lap welding with wall body reinforcing bar that has pre-buried and are connected, and welding length satisfies 5d standard design requirements, carries out outside template installation after the inspection is qualified.
And (3) ejecting the side line of the template by using an ink line before the outer mold is installed, and paying attention to the fact that the seam between the template and the bottom of the box culvert is filled with 18-22mm foam plates 7, so that the slurry leakage phenomenon in the concrete pouring process is prevented.
The roof and culvert body concrete pouring may include:
the box culvert wall body and roof concrete are poured in a symmetrical layering mode in the pouring process, the layering thickness is not more than 30cm, so that vibrating air bubbles can be discharged conveniently, the vibrating is in quincunx type inserting vibration, and vibration leakage or over vibration is avoided. The vibrating rod can not collide the template for a long time so as to prevent the template from deforming, running or expanding.
The removal of the inner and outer formworks and the support may include:
the height of the screw rod is supported by the top stress of the adjusting bracket through adjusting the retraction of the walking pulley, so that the top template falls off downwards under the assistance of self weight and manual external force, the wall body template retracts through adjusting the screw rods on the two sides to support, the bottom caulking foam plate 7 is removed, a gap of 1-2cm is formed between the culvert bottom concrete and the template, the template has a moving space, and the template can slide conveniently.
In the dismantling process, the gravity of the template support combination system acts on the walking pulleys, and the whole template is stressed and suspended by utilizing the contraction of the jack.
The steel wire rope is fixed at the position of the template bracket, and the template slowly slides out along the slide rail 4 through a winch or a chain block and the traction force of the steel wire rope.
It should be noted that construction steps and conditions not mentioned in the present application can refer to the prior art, and are not described herein in detail.
The main materials and construction equipment used in the construction process can be referred to tables 1 and 2, respectively.
TABLE 1 materials used mainly
| Material | Specification of | Length of | Number of |
| Form panel | 900*1500 | - | A plurality of |
| I-steel | [14 | ≤6m | A plurality of |
| Channel steel | [16 | ≤12m | A plurality of |
| Steel pipe | Φ48 | ≤6m | A plurality of |
| Customized chamfer template | According to design | - | A plurality of |
TABLE 2 Main construction machines
| Device name | Specification of equipment model | Number of | Use of |
| Hand pulling block (or windlass) | 10t | - | 6 pieces (1 piece) |
| Pistol drill | - | 2 handle | Punching |
| Jack | - | 8 sets | - |
| Walking pulley | - | 8 sets | - |
In addition, the quality control in the construction process can refer to:
(1) the construction process is in accordance with the standard requirements of technical Specifications for highway, bridge and culvert construction (JTG F50-2011);
(2) strictly controlling the splicing seams of adjacent templates, paying attention to the staggering of the templates at the splicing positions and meeting the standard requirement;
(3) the elevation of the top surface of the internal mold is measured by using a level gauge, the elevation error of the template is controlled within +20mm of a standard allowable error, and the template is convenient to disassemble while the standard requirement is met;
(4) the linearity of the channel steel of the walking track is strictly controlled, the fixed channel steel does not deviate, and the pulley 6 is prevented from being eccentric;
(5) the bottom edge of the template is filled with the foam board 7 with the thickness of 18-22mm, when the strength of the concrete reaches more than 85% of the design strength, the foam board 7 is cleaned, and the template falls off by assisting small tools such as a crow bar, an iron hammer and the like;
(6) when the template is disassembled and pulled to slide, the pulling operation is assisted at a constant speed without strong pulling when the chain block or the winch is used for operation, so that the finished concrete is prevented from being scratched or damaged.
The security measures can be referred to as:
(1) the worker wears the personal anti-protection article as required;
(2) mechanical equipment used on site needs to operate in a standard way, and special equipment needs to be certified;
(3) in the moving and hoisting processes of the internal mold, other operations are forbidden at two sides of the running radius of the hoisting equipment, and a specially-assigned person commands the equipment;
(4) in the process of disassembling the template, the principle of 'first support and then disassembly' must be followed;
(5) in the drawing process of the template, attention should be paid to checking the stress condition of the steel wire rope.
Environmental measures can be referred to as:
(1) the on-site template materials and the like are orderly stacked without random placement, and the stacking height of the steel is preferably not more than 1.2 m;
(2) after the construction is finished, the site can be cleaned completely, and small materials on the construction site can be cleaned completely;
(3) construction materials are strictly executed according to a 'limited material receiving' system, the construction materials are received according to the construction quantity every day, waste is avoided, and residual materials need to be recycled;
(4) and the concrete waste residues or the residual concrete after the pouring is finished are forbidden to be abandoned, and the concrete waste residues or the residual concrete are pulled to other work points or appointed waste material pools for treatment.
In the construction method, the ordinary steel pipe full-framing support 1+ double-framing [14 channel steel supporting beam 3+ steel form 2+ traveling pulley + [16 channel steel sliding rail 4 ] combined system form is adopted, the full-framing support 1 is erected by the ordinary steel pipe, the shaped steel form 2 is assembled and reinforced, the steel form 2 and the support are connected into a whole, and the vertical pressure of the plate top and the lateral pressure of the wall body are borne. The top of the full support 1 is longitudinally provided with a double-spliced [14 channel steel supporting beam 3, the bottom of the full support is provided with [16 channel steel as a walking sliding rail 4, the support and the template move simultaneously in the process of removing the inner mold, and the integral inner mold is pulled by using a chain block or a winch, so that the template removing efficiency is obviously improved; the turnover uses and adopts vehicle-mounted crane or crane to hoist and transport the support body and template wholly to reduce the template and demolish the number of times, effectively improve template turnover rate, improve the construction efficiency.
The following explains the specific benefits generated by the technical scheme provided by the application:
(I) economic benefits
Traditional box culvert construction technology requires the culvert to adopt customized steel form 2 to be under construction, and partial area requires to adopt the dish to detain formula support + square timber + plank sheathing construction technology, but in the work progress, the centre form all can't avoid the template to dismantle many times and assemble, has the transport installation inconvenient, steel template warp, wooden template breakage scheduling problem. This application has not only reduced the cost of labor through adopting the whole pull formula construction technology of box culvert centre form, has improved the efficiency of construction for the construction progress simultaneously. The whole pull formula construction technology of box culvert centre form that this application plan was carried out has solved the problem that traditional technology can't be overcome, has reduced the template and has dismantled the number of times, has guaranteed construction quality, has improved the construction efficiency, and mechanized construction degree further strengthens, and the turnover is transported conveniently, and the installation is swift, and the labour drops into the reduction. Through measurement and calculation, the cost of the box culvert integral internal mold splicing and disassembling drawing type construction process can be saved by about 4.08 ten thousand yuan. The construction economics are shown for example in table 3.
TABLE 3 economic benefits
(II) social benefits
Compared with the traditional box culvert construction process, the construction method provided by the application reduces the splicing and dismantling times of the inner formwork template, simultaneously, the original heavy inner formwork hoisting construction process gradually turns to the skill and the handiness, the labor intensity of workers is reduced, the labor cost is reduced, the splicing and dismantling from the template can be completed only by matching 4-5 workers, the production field is not occupied, the safety risk is extremely low, the splicing and dismantling times are reduced, the dismantling difficulty is reduced, the template turnover efficiency is improved, the construction progress is accelerated, the appearance quality is well guaranteed, the construction method is highly evaluated by constructors and supervision, and remarkable social benefits are shown.
The features and properties of the present invention are described in further detail below with reference to examples.
Example 1
The embodiment provides a box culvert construction assembly, and it includes full hall support 1, a supporting beam 3, horizontal bridging, steel form 2, pulley 6, slide rail 4, mechanical type hydraulic means 5, cystosepiment 7, hoist engine or chain block, crane.
The steel templates 2 are used for assembling a box culvert inner mould frame matched with a preset box culvert shape, and the full framing 1 is erected in the box culvert inner mould frame and connected with the inner wall of each steel template 2; supporting beam 3 longitudinal connection is connected with steel form 2 simultaneously in the top of full hall support 1, and slide rail 4 lays in the bottom of full hall support 1 along the length direction of the culvert of predetermineeing the box culvert, and pulley 6 is connected with supporting beam 3 and is used for sliding along slide rail 4.
Wherein, all the two connected steel templates 2 are connected by adopting a bolting mode; the steel moulding plate 2 is connected with the full framing 1 in a jacking mode; the supporting beam 3 and the steel template 2 are fixed by welding; the pulley 6 is connected with the support beam 3 by adopting a bolt connection mode.
The thickness of the steel moulding plate 2 is 42cm, and the span length is not more than 24 m. The support beam 3 is formed by double-spliced 14-channel steel. The vertical rods of the full-hall support 1 are 120cm in longitudinal distance and 120cm in transverse distance, the horizontal step distance does not exceed 90cm, the net height is larger than 6m, and the horizontal cross braces are arranged in the upper area and the lower area of the full-hall support 1.
The quantity of slide rail 4 is a plurality of, and a plurality of slide rails 4 set up along containing width direction interval, and the interval between 2 adjacent slide rails 4 is 2 m. The slide rail 4 is formed by No. 16 channel steel; the number of the pulleys 6 is also multiple, a plurality of pulleys 6 arranged at intervals are correspondingly distributed on each sliding rail 4, and the distance between every two adjacent pulleys 6 is 4 m. The pulley 6 is a directional pulley.
The mechanical hydraulic device 5 is used for driving the pulley 6 to slide, in particular a jack. The foam board 7 is used for filling a gap between the contact surface of the inner mould frame of the box culvert and the concrete foundation, and the thickness of the foam board 7 is 20 mm. The winch or the chain block is used for dragging the full-hall bracket 1 and the template to slide out integrally. The crane is used for hoisting and transporting the full framing 1 and the whole template.
The rest of the structure can be referred to the prior art.
Example 2
The embodiment provides a box culvert construction method, and the assembly provided in the embodiment 1 is used in the construction process. Referring to fig. 3, the flow of the box culvert construction method includes construction preparation (culvert foundation, bottom plate steel bars and culvert body steel bars are pre-buried and installed), installation and adjustment of an integral internal mold and a support, installation of culvert body external mold and top plate steel bars, pouring of top plate and culvert body concrete, removal of internal and external templates and supports, and next procedure.
Wherein, the construction preparation includes:
before construction, according to the section size of the box culvert, special-shaped templates such as a chamfer angle, an oblique crossing plug and the like are machined and customized, the rest positions are only required to be 900 multiplied by 1500 common flat molds, the inner mold is machined and customized according to the section size of the box culvert, and adjusting blocks are configured. The material of the full-hall support 1 is ordinary steel pipe, and the walking pulley (directional pulley) is driven by a customized mechanical hydraulic device 5. And (4) assembling the templates after the support is erected, wherein the templates are assembled into a rectangle and form a whole with the support. The integral inner mold adopts a common steel pipe full support 1+ double-spliced [14 channel steel supporting beam 3+ steel template 2+ traveling pulley + [16 channel steel sliding rail 4 combined system, and the connection among all the components is carried out by adopting welding, bolting, shoring and other modes, so that the connection among the combined systems is firm and reliable.
The foundation steel bars are manufactured and pulled to a construction site by a steel bar processing site in a unified mode, and the foundation steel bars are bound strictly according to the size of a construction drawing. And (3) popping up a steel bar position line on the surface of the cushion concrete by using an ink line before construction, binding the steel bar strictly operating according to the construction technical specification, welding the steel bar combined framework by adopting double-sided lap joint electric arc welding, and enabling the lap joint length to be not less than 5 d. And (5) paying attention to the accuracy of the position of the steel bar and the thickness of the protective layer during steel bar binding.
Before pouring the foundation concrete, checking whether the template is stable and reliable, pouring the concrete layer by layer according to a certain thickness (generally not more than 30cm) sequence and direction, and finishing pouring the upper-layer concrete before initial setting of the lower-layer concrete.
The culvert body reinforcing steel bars are embedded before the foundation concrete is poured, and temporary molds (simple clamping distances) are used for binding the reinforcing steel bars, so that accurate embedded sizes are ensured. And (4) binding the steel bars according to the drawing requirements and the types, the number, the inside and the outside of the steel bars, wherein the binding is never allowed to occur. The steel bars are disordered inside and outside, the binding and connection of the steel bars are firm without slippage, and the directions of the steel bar hooks are consistent and can not fall to one side. The concrete cushion blocks of the reinforcing steel bar protective layer are staggered and arranged between the reinforcing steel bars and the template in a scattered manner. The steel bar joints are staggered in the same section, and the number of the steel bar joints is not more than 1/2 of the number of the steel bars.
The installation and the regulation of whole centre form and support include:
after the strength of the foundation concrete reaches 85%, erecting an internal mold support; the full hall support 1 is set up the pole setting horizontal distance, vertical distance and horizon bar interval and is thick different according to the box culvert top board, and the support bears the load difference and adjusts. When the vertical and transverse distances of the vertical rods of the full support 1 are 120cm multiplied by 120cm, the maximum horizontal step distance is 90cm, and the clear height is more than 6m, the top layer and the bottom layer of the support are provided with horizontal cross braces.
After the support is erected, integral template assembly is carried out, the templates are connected with one another in a bolted mode, and the templates and the support are supported in a supporting mode; the double-spliced [14 channel steel longitudinal supporting beam 3 and the template are welded and fixed, and the directional pulley and the top longitudinal supporting beam 3 are bolted, so that the directional pulley and the template support system form a whole in the sliding process. The directional pulley walking [16 channel steel is laid along the culvert length direction, and the portable drill is used for drilling holes to fix the left and right sides, so that the channel steel is prevented from deviating in the left and right directions under the load action.
The pulleys 6 are arranged at intervals of 4m in the culvert length direction, the walking pulleys with the same section are arranged at transverse intervals of 2m, and if the culvert has a larger span, the walking pulleys with the same section can be additionally arranged.
After the formwork support system is installed, the contact surface of the inner mold and the concrete foundation adopts a 20mm foam plate 7 for joint filling, and a certain construction gap is reserved for the follow-up formwork dismantling process while slurry leakage is avoided. And adjusting the heights of the pulleys 6 and the jack by taking the elevation of the top die as a reference so as to enable each pulley 6 to be uniformly stressed. The lifting directional pulleys are in a stressed state, and wood wedges are adopted for fixing the front and the rear of the pulleys 6, so that the displacement of the templates in the side wall and top plate concrete pouring process is prevented.
The outer mould of culvert body and roof reinforcing bar installation include:
roof reinforcing bar unloading preparation, ligature are gone on according to the design drawing equally, carry out lap welding with wall body reinforcing bar that has pre-buried and are connected, and welding length satisfies 5d standard design requirements, carries out outside template installation after the inspection is qualified.
And (3) popping up the side line of the template by using an ink line before the external mold is installed, and paying attention to the fact that a 20mm foam plate 7 is adopted at the joint of the template and the bottom of the box culvert for filling, so that the slurry leakage phenomenon in the concrete pouring process is prevented.
Roof and culvert body concrete pour include:
the box culvert wall body and roof concrete are poured in a symmetrical layering mode in the pouring process, the layering thickness is not more than 30cm, so that vibrating air bubbles can be discharged conveniently, the vibrating is in quincunx type inserting vibration, and vibration leakage or over vibration is avoided. The vibrating rod can not collide the template for a long time so as to prevent the template from deforming, running or expanding.
The removal of interior outer template and support includes:
the height of the screw rod is supported by the top stress of the adjusting bracket through adjusting the retraction of the walking pulley, so that the top template falls off downwards under the assistance of self weight and manual external force, the wall body template retracts through adjusting the screw rods on the two sides to support, the bottom caulking foam plate 7 is removed, a gap of 1-2cm is formed between the culvert bottom concrete and the template, the template has a moving space, and the template can slide conveniently.
In the dismantling process, the gravity of the template support combination system acts on the walking pulleys, and the whole template is stressed and suspended by utilizing the contraction of the jack.
The steel wire rope is fixed at the position of the template bracket, and the template slowly slides out along the slide rail 4 through a winch or a chain block and the traction force of the steel wire rope.
The main materials and construction equipment used in the construction process are the same as those in tables 1 and 2, and the construction steps and conditions not mentioned refer to the prior art.
Application example
The construction method provided in embodiment 2 is applied to the first contract segment project of highway reconstruction engineering from G577 tex to shosu segment, the segment is located in tex county, illinois, and is re-worked at 23/4/2020, and the contract plan completion time is 2021, 10/30/10, which is currently under construction, wherein the box culvert stage is completed. The 31-kilometer box culvert in the whole project adopts the integral drawing construction process of the box culvert internal mold provided by the embodiment 2, and good effect is achieved.
The construction site drawings in the construction process are shown in fig. 4 to 18, wherein fig. 4 is a schematic diagram of assembly and polishing details of box culvert inner membranes, fig. 5 is a schematic diagram of installation details of the box culvert inner membranes, fig. 6 is a diagram of installation effect of templates on two sides of a full hall support, fig. 7 is a diagram of a real object of pulleys, fig. 8 is a diagram of installation effect of hoisting and positioning of an inner membrane, fig. 9 is a diagram of installation effect of a walking sliding track, fig. 10 is a diagram of binding effect of steel bars of the box culvert, fig. 11 is a diagram of treatment effect of the box culvert end-sealing templates, fig. 12 is a diagram of installation and fixing effect of the box culvert walking pulleys, fig. 13 is a diagram of installation effect of the box culvert walking pulleys, fig. 14 is a diagram of removal effect of the box culvert inner membranes, fig. 15 is a diagram of extension effect of removal of the box culvert inner membranes, fig. 16 is a diagram of hoisting and inverted transportation effect of removal of the box culvert inner membranes, fig. 17 is a diagram of effect of finished product after removal of the box culvert integral finished product, and fig. 18 is a diagram of the effect of the box culvert finished product.
The construction method is simple in construction, low in labor intensity and high in installation speed, solves the problem that the inner mold is disassembled for many times in the traditional construction process, achieves the aims of high turnover utilization rate of the template, low construction cost, low operation intensity and guaranteed concrete appearance quality, saves labor and materials, is praised by engineering supervision and owners, and creates good economic benefit and social benefit for enterprises.
In summary, the present application has at least the following advantages: by utilizing the construction method of integrally assembling and sliding the steel template 2, the number of times of template dismantling is reduced, and the construction efficiency is improved; the combined system form of a common steel pipe full support 1+ double-spliced [14 channel steel supporting beam 3+ steel template 2+ traveling pulley + [16 channel steel sliding rail 4 ] is adopted, and a winch or a chain block is adopted for sliding, so that the integral template is easy and labor-saving to slide, and the labor and mechanical costs are effectively reduced; the template can be wholly used in a turnover mode, and the mechanization degree is obviously improved.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A box culvert construction assembly is characterized by comprising a full support, a support beam, a plurality of steel templates, pulleys and slide rails;
the steel templates are used for assembling a box culvert inner mold frame matched with a preset box culvert in shape, and the full framing is erected in the box culvert inner mold frame and connected with the inner wall of each steel template; the supporting beam is longitudinally connected to the top of the full-space support and is simultaneously connected with the steel template, the sliding rail is laid at the bottom of the full-space support along the length direction of the culvert of the preset box culvert, and the pulley is connected with the supporting beam and is used for sliding along the sliding rail.
2. The box culvert construction assembly of claim 1, wherein all two of the connected steel formworks are connected by bolting;
or the steel formwork is connected with the full framing in a jacking mode;
or the supporting beam and the steel template are fixed by welding;
or the pulley and the support beam are connected in a bolt connection mode.
3. The box culvert construction assembly of claim 1, wherein the steel template has a thickness of 40-45cm and a span of no more than 24 m;
or the supporting beam is formed by double-spliced 14-channel steel.
4. The box culvert construction assembly of claim 1, wherein when the vertical rod longitudinal distance of the full hall bracket is 115-125cm, the transverse distance is 115-125cm, the horizontal step distance does not exceed 90cm, and the clear height is greater than 6m, the box culvert construction assembly further comprises horizontal cross braces arranged in the upper area and the lower area of the full hall bracket.
5. The box culvert construction assembly of claim 1, wherein the number of the slide rails is multiple, the slide rails are arranged at intervals along the width direction of the culvert, and the distance between every two adjacent slide rails is 1.5-2.5 m;
preferably, the slide rail is formed from 16 channel steel;
preferably, the number of the pulleys is also multiple, each slide rail is correspondingly provided with a plurality of the pulleys arranged at intervals, and the distance between every two adjacent pulleys is 3.5-4.5 m;
preferably, the pulley is a directional pulley.
6. The box culvert construction assembly of claim 1, further comprising a mechanical hydraulic device for driving the pulleys to slide;
preferably, the mechanical hydraulic device is a jack;
preferably, the box culvert construction assembly further comprises a foam board for filling a gap between the contact surface of the box culvert inner mould frame and the concrete foundation; more preferably, the foam sheet has a thickness of 18-22 mm;
preferably, the box culvert construction assembly further comprises a winch or a chain block for pulling the full framing and the formwork to slide out integrally;
preferably, the box culvert construction assembly further comprises a crane for hoisting and transporting the full framing and the formwork integrally.
7. Use of a box culvert construction assembly in box culvert construction according to any one of claims 1-6.
8. The box culvert construction method is characterized by comprising the following steps: after the steel bars of the culvert body are embedded and installed, the box culvert construction assembly of any one of claims 1-6 is adopted for assisting in box culvert construction, and after the box culvert is formed, the box culvert construction assembly is removed;
preferably, removing the box culvert construction assembly comprises: and integrally removing the steel formwork and the full framing in a drawing mode.
9. The construction method according to claim 8, wherein before embedding and installing the steel bars of the culvert body, the construction method further comprises the steps of welding the steel bar combined framework;
preferably, the welding is performed by double-sided lap joint arc welding;
preferably, the overlap length is not less than 5 times the diameter of the rebar.
10. The construction method according to claim 8, wherein the box culvert construction process comprises pouring concrete on the wall body and the top plate of the box culvert, and the pouring adopts a symmetrical layered pouring mode;
preferably, the delamination thickness is not more than 30 cm.
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| CN202110980183.8A CN113622328A (en) | 2021-08-25 | 2021-08-25 | Box culvert construction assembly, application thereof and box culvert construction method |
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| CN202110980183.8A CN113622328A (en) | 2021-08-25 | 2021-08-25 | Box culvert construction assembly, application thereof and box culvert construction method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115319898A (en) * | 2022-08-18 | 2022-11-11 | 山东省路桥集团有限公司 | Prefabricated box culvert forming device and construction method thereof |
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| CN105220626A (en) * | 2015-10-27 | 2016-01-06 | 安徽水安建设集团股份有限公司 | Steel form device and the construction method that combines with outer steel mould plate thereof in a kind of self-propelled |
| CN106120584A (en) * | 2016-08-29 | 2016-11-16 | 五冶集团上海有限公司 | A kind of box culvert slip form construction device and method |
| CN112458936A (en) * | 2020-11-30 | 2021-03-09 | 中铁十六局集团地铁工程有限公司 | Construction method for integrally translating box culvert full-hall support |
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| US4219513A (en) * | 1978-11-27 | 1980-08-26 | Miller Coston B | Method and means of construction of concrete culverts |
| CN104894986A (en) * | 2015-06-10 | 2015-09-09 | 中铁五局（集团）有限公司 | Integrated movable box type culvert internal template equipment |
| CN105220626A (en) * | 2015-10-27 | 2016-01-06 | 安徽水安建设集团股份有限公司 | Steel form device and the construction method that combines with outer steel mould plate thereof in a kind of self-propelled |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115319898A (en) * | 2022-08-18 | 2022-11-11 | 山东省路桥集团有限公司 | Prefabricated box culvert forming device and construction method thereof |
| CN115319898B (en) * | 2022-08-18 | 2023-10-17 | 山东省路桥集团有限公司 | Prefabricated box culvert forming device and construction method thereof |
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