CN116876562A - Construction process for prefabricated mounting assembled box culvert of whole section - Google Patents
Construction process for prefabricated mounting assembled box culvert of whole section Download PDFInfo
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- CN116876562A CN116876562A CN202310664734.9A CN202310664734A CN116876562A CN 116876562 A CN116876562 A CN 116876562A CN 202310664734 A CN202310664734 A CN 202310664734A CN 116876562 A CN116876562 A CN 116876562A
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- 238000010276 construction Methods 0.000 title claims abstract description 70
- 238000000034 method Methods 0.000 title claims abstract description 31
- 230000008569 process Effects 0.000 title claims abstract description 27
- 238000003860 storage Methods 0.000 claims abstract description 43
- 238000009417 prefabrication Methods 0.000 claims abstract description 24
- 238000012545 processing Methods 0.000 claims abstract description 6
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- 230000007246 mechanism Effects 0.000 claims description 69
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- 210000001503 joint Anatomy 0.000 claims description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 21
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- 230000002787 reinforcement Effects 0.000 claims description 17
- 238000004519 manufacturing process Methods 0.000 claims description 10
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- 238000009412 basement excavation Methods 0.000 claims description 6
- 239000000758 substrate Substances 0.000 claims description 6
- 239000000565 sealant Substances 0.000 claims description 5
- 239000004587 polysulfide sealant Substances 0.000 claims description 4
- 239000002002 slurry Substances 0.000 claims description 4
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 238000005056 compaction Methods 0.000 claims description 3
- 230000002349 favourable effect Effects 0.000 claims description 3
- 238000011068 loading method Methods 0.000 claims description 3
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 3
- 238000007493 shaping process Methods 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 238000011049 filling Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 8
- 239000002699 waste material Substances 0.000 abstract description 4
- 229910001294 Reinforcing steel Inorganic materials 0.000 abstract description 2
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/045—Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them
-
- 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
Abstract
The application relates to a construction process of a whole-section prefabricated mounting assembly box culvert, which relates to the technical field of culvert construction and comprises the following steps: the construction method comprises the steps of construction of a culvert prefabrication operation area, processing and installing reinforcing steel bars, prefabrication of horizontal culvert sections, concrete pouring of the culvert sections, on-site foundation construction, storage and transportation of the culvert sections and overturning of the culvert sections, wherein the overturning of the culvert sections is realized by adopting a mode of matching snap rings with pulleys to form fixed pulley blocks, so that the culvert sections can be overturned conveniently; compared with the on-site pouring in the whole construction step, the prefabricated culvert is energy-saving, reduces material waste, reduces engineering quantity, saves labor and reduces cost, so that engineering quality is easy to control and improve.
Description
Technical Field
The application relates to the technical field of culvert construction, in particular to a whole-section prefabricated mounting assembly type box culvert construction process.
Background
At present, with the high-speed development of the economy in China, the trade transportation scale and the continuous improvement of the motor vehicle conservation amount, the proportion of the high-grade highway construction to the infrastructure construction is increased year by year.
Aiming at the related technology, the inventor considers that a culvert channel is taken as a main form for crossing a highway, and generally adopts a construction process of binding steel bars, supporting a formwork and pouring concrete on site, the construction operation time is long, the wet operation workload is large, longer concrete maintenance time is needed, backfilling cannot be carried out for a longer time after slotting, the influence of weather is large, the construction quality is not easy to control, and great hidden danger is brought to personal and property safety.
Disclosure of Invention
The application aims to solve the problems that the construction operation of culvert channels is difficult and the quality is not easy to control, and provides a construction process for a whole-section prefabricated mounting type box culvert.
The application provides a construction process for a whole-section prefabricated mounting type box culvert, which adopts the following technical scheme:
a construction process for a whole-section prefabricated mounting assembly box culvert comprises the following steps:
the construction steps of the culvert prefabrication operation area are as follows: firstly, rolling the surface of a prefabricated site to realize compaction and leveling, dividing the prefabricated site into a culvert storage area and a culvert prefabricated area, paving a gravel cushion layer in the culvert storage area, and pouring concrete on the surface of the culvert prefabricated area for hardening treatment;
the processing and installing steps of the steel bar are as follows: manufacturing a telescopic steel bar jig frame and steel bars in a steel bar processing field, conveying the manufactured steel bars to a culvert section prefabrication area, placing the steel bars in the telescopic steel bar jig frame for welding and binding, and embedding culvert section hanging rings in the process of installing and connecting the steel bars to manufacture a steel bar framework;
prefabricating the horizontal culvert sections: the culvert section template adopts a shaping steel template and consists of an outer mold, an inner mold and a bottom mold, wherein the inner mold is firstly installed in the steel reinforcement framework when the culvert section template is assembled, and after the steel reinforcement framework is integrally lifted and positioned, an outer layer steel reinforcement protection layer cushion block is arranged on the periphery of the steel reinforcement framework, and then the outer mold is installed on the outer side of the steel reinforcement framework;
and (3) concrete pouring of the culvert sections: filling concrete into the mould body, and vibrating the concrete in the mould body through an inserted vibrator; when the plug-in vibrator is used, the moving distance should not exceed 1.5 times of the acting radius of the vibrator, and the distance between the vibrator and the side mould should be kept between 5cm and 10 cm; the vibrator is inserted into the lower layer concrete for 5 cm-10 cm to fully combine the two layers of concrete, the inserted vibrator is taken out after the vibration is finished, and the vibrator is covered and sprayed with water for curing after the slurry is recovered, and the curing period is 7 days;
the construction steps of the site foundation are as follows: carrying out foundation pit excavation on site and simultaneously prefabricating the culvert sections, wherein the foundation pit construction is carefully matched with the prefabricating progress of the culvert sections, so that the situations that the foundation pit is excavated and then immersed in water and the like are prevented, and the foundation pit excavation is carried out after the prefabricating of the culvert sections of the construction culvert is basically completed; when the foundation pit is excavated, strictly forbidden to be overdrawn, reserving 20cm before mechanically excavating to a substrate, and then manually excavating to a designed elevation; if the over-digging condition occurs, the loose part is removed, and then the substrate is treated;
and (3) storage and transportation of culvert sections: when the strength of the concrete of the culvert section reaches 85% or more of the designed strength, lifting the culvert section to a culvert section storage area by adopting a portal crane; during loading, the culvert sections are lifted to a transport vehicle through a portal crane, and are lifted to a flat site in a horizontal posture after being transported to the site, and a rubber tire support pad is arranged below the culvert sections;
and (3) a culvert section overturning step: the crane adopts a T-shaped hanging head, two ends of the T-shaped hanging head are provided with unhooking prevention devices, two sides of the T-shaped hanging head are respectively hung with a steel wire rope, a U-shaped clamping ring is sleeved below each steel wire rope, a pulley is arranged on a pin of the U-shaped clamping ring, a section of steel wire rope is hung on the pulley, the lower end of the section of steel wire rope hung on the pulley is connected with a hanging ring pre-buried in a culvert section top plate to form a fixed pulley block, and then the crane is started to overturn the culvert section;
and (3) butt joint installation of culvert sections: after the previous section culvert section is hoisted in place, a water stop strip and a coating sealant are attached to the contact surface of the culvert section, then a spring line is arranged along the discovery direction of the end position of the previous section culvert section, the spring line is used as a reference basis for installing the next section culvert section, and then each section culvert section is butted according to the direction of the spring line.
By adopting the technical scheme, compared with on-site pouring, the prefabricated culvert is energy-saving, reduces material waste, reduces engineering quantity, saves labor and reduces cost. The mechanical installation is matched with a small amount of manual installation, so that a large amount of labor force can be saved, and the comprehensive economic benefit is obvious; the production of culverts and the on-site assembly are synchronously carried out, the construction is carried out in a running water way, the mechanical operation degree is high, the labor intensity of workers is low, the efficiency is high, and the speed is high; the construction operation is standardized, and the engineering quality is good. The prefabrication and the installation of culvert sections are all carried out according to standardized management and mechanical running water operation, so that the engineering quality is easy to control and improve.
Optionally, in the construction step of the culvert prefabrication operation area, leveling the prefabrication site through a bulldozer, continuously rolling with a 20T vibratory roller after leveling, paving a 20cm gravel layer in the culvert prefabrication area, hardening the culvert prefabrication area with 10cm thick C20 concrete, and setting a screw-thread steel with a nominal diameter of 12mm below the culvert prefabrication pedestal.
Through adopting above-mentioned technical scheme, can make the storage of culvert festival more stable and safe after the prefabricated district hardening treatment of culvert festival, be difficult for producing the house that collapses or because collapse leads to the condition that the culvert festival itself receives the harm.
Optionally, in the construction step of the culvert prefabricating operation area, a drainage ditch is preset when the prefabricating site is hardened.
Through adopting above-mentioned technical scheme, escape canal can in time drain the rainwater when rainy season, avoids piling up at the prefabricated operation district of culvert festival and causes corrosivity injury to the culvert festival.
Optionally, in the step of casting the culvert concrete, casting the concrete at a time most favorable in one day; in summer construction, concrete construction of culverts is selected in the morning and evening with lower temperature, and the high-temperature time periods of noon and afternoon are avoided; during winter construction, the method is carried out in a time period with high air temperature in one day, namely, in the morning and noon, and the time periods before and after the evening and sunrise are avoided.
By adopting the technical scheme, construction is performed when the temperature in summer is low, and construction is performed when the temperature in winter is high, so that concrete can be solidified under the condition of good temperature, and the occurrence of construction joints can be reduced to a certain extent.
Optionally, in the step of turning over the culvert section, the T-shaped hanging head includes a transverse load beam and a vertical hanging beam, and the vertical hanging beam is vertically arranged in the middle of the transverse load beam; the unhooking prevention device comprises a pressing closing mechanism and a contact alarm mechanism; the pressing closing mechanism is arranged on the transverse bearing beam, and the contact alarm mechanism is arranged on the vertical hanging beam; the upper surface of the transverse bearing beam is provided with a positioning groove, the positioning groove is used for hanging a steel wire rope, and after the steel wire rope is pressed into the positioning groove, the pressing closing mechanism automatically closes the end part of the transverse bearing beam after being pressed by the steel wire rope; when the steel wire rope is moved out of the positioning groove or pressure is not applied to the positioning groove, the pressing closing mechanism automatically opens the end part of the transverse bearing beam; and the contact alarm mechanism automatically alarms when the end part of the transverse bearing beam is opened and automatically cuts off power when the end part of the transverse bearing beam is closed.
By adopting the technical scheme, when the steel wire rope is positioned in the positioning groove, and the T-shaped hanging head begins to be hung, the weight of the culvert section can force the steel wire rope to press the positioning groove, so that the end part of the transverse bearing beam is automatically closed by the pressing closing mechanism, the end part of the transverse bearing beam is in a closed state, and the contact alarming mechanism can not alarm, so that the steel wire rope is indicated to be positioned in the positioning groove stably; if the steel wire rope slides out of the positioning groove, no pressing force is applied to the positioning groove, at the moment, the pressing closing mechanism automatically opens the end part of the transverse bearing beam, the contact alarming mechanism can give out alarming sound, and prompt on-site staff that the steel wire rope is not fixed, so that the staff can conveniently find the installation state of the steel wire rope in time to facilitate the follow-up hoisting work of the culvert section.
Optionally, the pressing closing mechanism comprises a pressing block, a horizontal pushing block and an abutting block; a first vertical channel is vertically formed in the transverse bearing beam below the positioning groove, and the pressing block is inserted in the first vertical channel in a sliding manner; a transverse channel is horizontally arranged in the transverse bearing beam, the transverse channel is vertical to and communicated with the first vertical channel, and the horizontal pushing block is inserted in the transverse channel in a sliding manner; a second vertical channel is vertically arranged at a position, close to the end part, in the transverse bearing beam, and is also vertically communicated with one end, far away from the first vertical channel, of the transverse channel, and the abutting block is vertically and slidably inserted in the second vertical channel; the pressing block is vertically moved downwards, and the horizontal pushing block is displaced in the transverse channel and pushes the abutting block to vertically move upwards; the vertical hanging beam is horizontally provided with a connecting beam, an abutting block is arranged right above the abutting block on the connecting beam, and the end part of the transverse bearing beam is closed after the abutting block is attached to the abutting block after being moved upwards.
Through the technical scheme, after the steel wire rope is positioned in the positioning groove, when the T-shaped hanging head steers the culvert, the steel wire rope receives tension and converts the tension into pressure to be applied to the pressing block, so that the pressing block is pushed to vertically move downwards in the first vertical channel, and at the moment, the horizontal pushing block is pushed to one side close to the abutting block under the fitting action of the inclined abutting surface after the pressing block moves downwards; the abutting block can push the abutting block upwards under the attaching action of the inclined abutting surface, so that the abutting block vertically moves upwards in the second vertical channel and finally abuts against the abutting block to seal the end part of the transverse bearing beam, and the effect of conveniently sealing the end part of the transverse bearing beam is achieved.
Optionally, the elastic cavity has all been seted up along self direction to one side of first vertical passageway, second vertical passageway and horizontal passageway, all be provided with the lug that stretches into to the elastic cavity on pushing block, level and the butt piece, every be provided with the spring between the end wall in lug and the elastic cavity, be located the spring of pushing block one side and have the trend of pushing up the vertical upward of pressing block all the time, be located the spring of pushing block one side of level and have all the trend of pushing up the horizontal direction of pushing up the block in the direction of being close to the push block all the time, be located the spring of butt piece one side have all the trend of pushing down the butt piece vertically all the time.
By adopting the technical scheme, when the culvert is not needed to be hoisted, the steel wire rope does not apply pressure to the pressing block any more, or the steel wire rope is directly taken out from the positioning groove, the spring close to the abutting block drives the abutting block to vertically move downwards to squeeze the horizontal pushing block, the spring close to the horizontal pushing block drives the horizontal pushing block to approach to the pressing block side and has a trend of moving towards the first vertical channel, and finally the pressing block is vertically moved upwards by thrust and the thrust brought by the spring; after the abutting block moves downwards, the end part of the transverse bearing beam is in an opening state, so that the effect of automatically opening the end part of the transverse bearing beam when a culvert is not lifted is achieved, and the steel wire rope is also conveniently taken down from the T-shaped hanging head.
Optionally, the contact alarm device comprises an energizing alarm mechanism and a power supply mechanism; the power supply mechanism is arranged on the connecting beam, the power-on alarm mechanism is arranged on the vertical hanging beam, the power supply mechanism is used for supplying electric energy into the power-on alarm mechanism when the abutting block abuts against the abutting block, and the power-on alarm mechanism is used for giving out warning sound after power-on and closing the warning sound after power-off.
By adopting the technical scheme, when the abutting block abuts against the abutting block, the end part of the transverse bearing beam is closed, and the energizing alarm mechanism does not give out alarm sound, so that the position of the steel wire rope is indicated to be normally positioned in the positioning groove; if the butt block is not in butt joint with the butt block and is separated, at the moment, the end part of the transverse bearing beam is opened, and the power-on alarm mechanism gives out alarm sound, so that the steel wire rope is not normally positioned in the positioning groove, and the position of the steel wire rope needs to be readjusted and cannot be lifted normally, and the effect that the position of the steel wire rope is found out in time and then the steel wire rope cannot be lifted normally when the subsequent culvert section is lifted is avoided is achieved.
Optionally, the power supply mechanism comprises a mounting block, a storage battery and a hinging rod; the storage battery storage device comprises a storage cavity, a storage battery, a butt joint block, a connecting beam, a mounting block and a storage battery, wherein the mounting block is arranged at the end part of the connecting beam, the storage cavity is formed in the mounting block, the storage battery is placed in the storage cavity, a sliding cavity is formed in the lower end of the storage cavity on the mounting block, and the butt joint block is inserted in the sliding cavity in a sliding mode; the side wall of the sliding cavity is vertically provided with a penetrating bar hole, the side wall of the butt joint block, which is close to the top, is provided with a butt joint rod extending out of the penetrating bar hole, the hinge rod is hinged on the connecting beam, and the end part of the butt joint rod is connected with one end of the hinge rod through a tension spring; the power-on alarm mechanism comprises an alarm and a conductive block, the alarm is arranged on the vertical hanging beam, the conductive block is arranged on one side of the vertical hanging beam, which is close to the hinging rod, and the conductive block is electrically connected with the alarm; one end of the hinging rod, which is far away from the tension spring, is provided with a conducting strip, and the conducting strip is electrically connected with the storage battery; when the abutting block abuts against the abutting block to vertically move upwards in the sliding cavity, one end, away from the tension spring, of the hinging rod is inclined downwards, and the conducting sheet is separated from the conducting block; when the butt block is not abutted against the butt block any more so that the butt block moves vertically in the strong sliding, the hinging rod is in a horizontal state and the conductive sheet is attached to the conductive block.
By adopting the technical scheme, when the abutting block is abutted against the abutting block from bottom to top and pushes the abutting block to vertically move upwards, the abutting rod can pull one end of the hinging rod to incline upwards, so that the other end of the hinging rod provided with the conducting strip is inclined downwards and separated from the conducting block, at the moment, the storage battery cannot supply electricity to the alarm, and the alarm stops giving out alarm sound after the alarm is powered off; when the abutting block vertically moves downwards and is separated from the abutting block, the abutting block naturally falls under the action of gravity, the abutting rod is driven to vertically move downwards, one end of the hinging rod pulled by the abutting rod is changed into a horizontal state from an inclined upward state, at the moment, the conducting strip is attached to the conducting block again, the storage battery supplies electric energy to the alarm, the alarm gives out alarm sound again, and finally the effect of correspondingly controlling the alarm to give out alarm sound according to the opening and closing of the end part of the transverse bearing beam is achieved.
Optionally, in the butt joint installation step of the culvert sections, the sealant is a double-component polysulfide sealant, and the water stop bars are water-swelling water stop bars.
By adopting the technical scheme, the two-component polysulfide sealant is a normal-temperature vulcanized two-component polysulfide sealant which has self-adhesive performance with concrete and takes liquid polysulfide rubber as a base material and has caulking water-stopping capability; the water-swelling type water stop strip generates expansion deformation which is 2-3 times after meeting water, fills all irregular surfaces, holes and gaps of the joint, generates huge contact pressure, and can prevent leakage to a greater extent.
In summary, the present application includes at least one of the following beneficial technical effects:
1. compared with on-site pouring, the prefabricated culvert is energy-saving, reduces material waste, reduces engineering quantity, saves labor and reduces cost. The mechanical installation is matched with a small amount of manual installation, so that a large amount of labor force can be saved, and the comprehensive economic benefit is obvious; the production of culverts and the on-site assembly are synchronously carried out, the construction is carried out in a running water way, the mechanical operation degree is high, the labor intensity of workers is low, the efficiency is high, and the speed is high; the construction operation is standardized, and the engineering quality is good. Prefabricating and installing culvert sections, and managing mechanized running water operation according to standardization, so that engineering quality is easy to control and improve;
2. when the steel wire rope is positioned in the positioning groove, the T-shaped hanging head begins to hoist, the weight of the culvert section can force the steel wire rope to press the positioning groove, so that the pressing closing mechanism can automatically close the end part of the transverse bearing beam, at the moment, the end part of the transverse bearing beam is in a closed state, and the contact alarming mechanism can not alarm, so that the steel wire rope is indicated to be stably positioned in the positioning groove; if the steel wire rope slides out of the positioning groove, no pressing force is applied to the positioning groove, at the moment, the pressing closing mechanism automatically opens the end part of the transverse bearing beam, the contact alarming mechanism can give out alarming sound, and prompt on-site staff that the steel wire rope is not fixed, so that the staff can conveniently find the installation state of the steel wire rope in time to facilitate the follow-up hoisting work of the culvert section.
Drawings
FIG. 1 is a schematic flow chart of an embodiment of the present application;
FIG. 2 is a partial cross-sectional view of an embodiment of the present application showing a T-shaped hoist;
FIG. 3 is a partial cross-sectional view of an embodiment of the present application showing a push closure mechanism;
fig. 4 is a partial cross-sectional view of an embodiment of the application for illustrating a contact alert mechanism.
In the figure, a T-shaped hanging head is shown; 2. a transverse load beam; 21. a positioning groove; 22. a first vertical channel; 23. a transverse channel; 24. a second vertical channel; 3. a vertical hanging beam; 31. a connecting beam; 32. a butt joint block; 321. a supporting rod; 4. an unhooking prevention device; 5. pressing the closing mechanism; 51. pressing the blocks; 52. a horizontal pushing block; 53. an abutment block; 6. a contact alarm mechanism; 61. energizing an alarm mechanism; 611. an alarm; 612. a conductive block; 62. a power supply mechanism; 621. a mounting block; 6211. a storage chamber; 6212. a sliding chamber; 6213. penetrating the strip hole; 622. a storage battery; 623. a hinge rod; 6231. a conductive sheet; 7. an inclined abutment surface; 8. an elastic cavity; 81. a spring; 9. and a bump.
Detailed Description
The present application will be described in further detail with reference to fig. 1 to 4.
The construction process of the whole-section prefabricated mounting assembled box culvert, combined with figures 1 and 2, comprises the following steps:
the construction steps of the culvert prefabrication operation area are as follows: firstly, rolling the surface of a prefabricated site to realize compaction and leveling, rolling by using a vibrating roller with the length of 20T during rolling, dividing into a culvert storage area and a culvert prefabricated area, paving a gravel cushion layer with the thickness of 20cm on the culvert storage area, pouring C20 concrete with the thickness of 10cm on the surface of the culvert prefabricated area for hardening treatment, setting screw steel with the nominal diameter of 12mm below a culvert prefabricated pedestal, and finally, presetting a drainage ditch when the prefabricated site is hardened, and draining rainwater in time in rainy days;
the processing and installing steps of the steel bar are as follows: manufacturing a telescopic steel bar jig frame and steel bars in a steel bar machining field, and uniformly machining semi-finished products of the steel bars in the steel bar machining field by adopting a numerical control bending machine in order to ensure the machining accuracy of the steel bars; the steel bar jig is made of materials with strength and rigidity meeting requirements; during manufacturing, the accuracy of the positions of the steel bars is noted, and the diameters of the steel bars of the culvert sections are needed to be considered for positioning the steel bars; when the steel bars are processed, considering the blanking length of the joint staggered position, and meeting the requirement that the number of the joints of the steel bars with the same section of the pressed steel bars is less than 50 percent; after the manufacturing, conveying the steel bars to a culvert section prefabrication area, and placing the steel bars in a telescopic steel bar jig frame for welding and binding, wherein the prefabrication posture and the installation posture of the culvert section form an angle of 90 degrees, 4 hanging rings are additionally arranged at the top of the culvert section, so that the requirement of on-site overturning of the culvert section is met, and finally, the steel bar framework is manufactured;
prefabricating the horizontal culvert sections: the culvert section template adopts a shaping steel template and consists of an outer mold, an inner mold and a bottom mold, the inner mold is firstly installed in the steel reinforcement framework during the assembly of the culvert section template, then after the steel reinforcement framework is integrally lifted and positioned, an inner layer steel reinforcement protection layer cushion block is firstly arranged in the inner layer of the steel reinforcement framework, then an outer layer steel reinforcement protection layer cushion block is arranged on the periphery of the steel reinforcement framework, the strength of the protection layer cushion block is not lower than that of concrete of the culvert body, and finally the outer mold is installed on the outer side of the steel reinforcement framework;
and (3) concrete pouring of the culvert sections: the concrete adopts C40 concrete mixing proportion which is recovered in a central laboratory, is intensively mixed by a mixing station, is transported by a concrete tank truck, is subjected to quick-speed rotary stirring for at least 20 seconds before being discharged, and then is subjected to concrete performance detection and data recording, and concrete pouring is carried out under the condition that various performances of the concrete meet the requirements. The pouring should be layered and continuous, the pouring time is not more than 3 hours, and the construction joint cannot be prevented from occurring beyond the initial setting time of the concrete; the concrete pouring is carried out in the most favorable time in one day, and the concrete construction of the box culvert is carried out in the morning and evening with lower temperature as much as possible in summer construction, so that the high-temperature time periods of noon and afternoon are avoided; during winter construction, the method is carried out in a time period with higher air temperature in one day, and in the morning and noon, the time periods before and after the evening and sunrise are avoided; the vibration of the concrete is mainly an inserted vibrator. When concrete is poured, the material distribution is uniform, and the pouring thickness of each layer is not more than 30cm. The material distribution speed is matched with vibration, and the vibration time is the degree that concrete stops sinking, does not bubble, and the surface is flat and slurry is flooded; when the plug-in vibrator is used, the moving distance should not exceed 1.5 times of the acting radius of the vibrator, and the distance between the vibrator and the side mould should be kept between 5cm and 10 cm; the vibrator is inserted into the lower layer concrete for 5 cm-10 cm to fully combine the two layers of concrete; and after each part is vibrated, the vibrator is slowly lifted out while vibrating, so that the vibrator is prevented from colliding with templates, reinforcing steel bars and other embedded parts. The observation is enhanced in the construction, and phenomena such as leakage vibration, lack vibration, over vibration and the like are prevented; after the concrete pouring is completed, covering and watering for curing after the slurry is recovered, wherein the curing period is 7 days; the health preserving adopts film wrapping, and is covered by geotextile, the health preserving surface keeps a wet state continuously, and dry and wet alternate health preserving is forbidden;
the construction steps of the site foundation are as follows: carrying out foundation pit excavation on site and simultaneously prefabricating the culvert sections, wherein the foundation pit construction is carefully matched with the prefabricating progress of the culvert sections, so that the situations that the foundation pit is excavated and then immersed in water and the like are prevented, and the foundation pit excavation is carried out after the prefabricating of the culvert sections of the construction culvert is basically completed; when the foundation pit is excavated, strictly forbidden to be overdrawn, reserving 20cm before mechanically excavating to a substrate, and then manually excavating to a designed elevation; if the over-digging condition occurs, the loose part is removed, and then the substrate is treated; it is noted that before the concrete foundation construction, the foundation bearing capacity is detected first, after the foundation bearing capacity meets the design requirement, the construction of a 50cm gravel cushion layer is carried out, the construction is completed, the rolling is smooth and solid, then the C25 concrete foundation construction is carried out, the thickness of the concrete foundation is 20cm, and each side is 20cm wider than the culvert body. When the concrete foundation is constructed, the direction of the culvert running water slope is noted. After construction is finished, the surface is flat and no hollow exists, so that the requirements of construction and installation of culverts are met;
and (3) storage and transportation of culvert sections: when the strength of the concrete of the culvert section reaches 85% or more of the designed strength, lifting the culvert section to a culvert section storage area by adopting a portal crane; during loading, the culvert sections are lifted to a transport vehicle through a portal crane, and are lifted to a flat site in a horizontal posture after being transported to the site, and a rubber tire support pad is arranged below the culvert sections;
and (3) a culvert section overturning step: the crane adopts a T-shaped hanging head 1, the two ends of the T-shaped hanging head 1 are provided with unhooking prevention devices 4, then steel wire ropes are hung on two sides of the T-shaped hanging head 1, a U-shaped clamping ring is sleeved below each steel wire rope, a pulley is arranged on a pin of the U-shaped clamping ring, a section of steel wire rope is hung on the pulley, the lower end of the section of steel wire rope hung on the pulley is connected with a hanging ring pre-buried in a culvert section top plate to form a fixed pulley block, and then the crane is started to overturn the culvert section;
and (3) butt joint installation of culvert sections: after the previous section culvert section is hoisted in place, a water stop strip and a coating sealant are attached to the contact surface of the culvert section, then a spring line is arranged along the discovery direction of the end position of the previous section culvert section, the spring line is used as a reference basis for installing the next section culvert section, and then each section culvert section is butted according to the direction of the spring line.
The difficulty of field hoisting and overturning is how to enable four steel wire ropes on the hoisting ring to be stressed simultaneously in the overturning process, so that the safety in the overturning process is ensured. After repeated pushing and on-site professional hoisting unit research, a fixed pulley block is formed by determining a mode of adopting a snap ring to match with a pulley, and in the method, the length and the angle of the steel wire rope are dynamically adjusted through the fixed pulley in the process of turning over the culvert section, so that the steel wire rope is always stressed at four points, the stressed direction is always kept vertically upwards, the generation of oblique force in the process of turning over is avoided, the danger of instability of a crane is avoided, and meanwhile, the friction problem between the steel wire rope and the snap ring in the process of changing the posture of the culvert section is also well solved; compared with on-site pouring, the prefabricated culvert is energy-saving, reduces material waste, reduces engineering quantity, saves labor and reduces cost. The mechanical installation is matched with a small amount of manual installation, so that a large amount of labor force can be saved, and the comprehensive economic benefit is obvious; the production of culverts and the on-site assembly are synchronously carried out, the construction is carried out in a running water way, the mechanical operation degree is high, the labor intensity of workers is low, the efficiency is high, and the speed is high; the construction operation is standardized, and the engineering quality is good. The prefabrication and the installation of culvert sections are all carried out according to standardized management and mechanical running water operation, so that the engineering quality is easy to control and improve.
As shown in fig. 2 and 3, the T-shaped hanging head 1 comprises a transverse bearing beam 2 and a vertical hanging beam 3, wherein the vertical hanging beam 3 is vertically arranged in the middle of the transverse bearing beam 2; the unhooking prevention device 4 comprises a pressing closing mechanism 5 and a contact alarming mechanism 6; the pressing closing mechanism 5 is arranged on the transverse bearing beam 2, and the contact alarm mechanism 6 is arranged on the vertical hanging beam 3; the upper surface of the transverse bearing beam 2 is provided with a positioning groove 21, the positioning groove 21 is used for hanging a steel wire rope, and after the steel wire rope is pressed into the positioning groove 21, the pressing closing mechanism 5 is pressed by the steel wire rope and then automatically closes the end part of the transverse bearing beam 2; when the steel wire rope is removed from the positioning groove 21 or pressure is not applied to the positioning groove 21, the pressing closing mechanism automatically opens the end part of the transverse bearing beam 2; and the contact alarm mechanism 6 automatically alarms when the end of the transverse bearing beam 2 is opened and automatically cuts off power when the end of the transverse bearing beam 2 is closed.
When the culvert section is overturned, the alarm principle is as follows: when the steel wire rope is positioned in the positioning groove 21, if the action of hoisting the culvert is started, the steel wire rope can be certainly stressed by the tension from the culvert, the steel wire rope can be tightly pressed in the positioning groove 21, at the moment, the end part of the transverse bearing beam 2 is in a closed state, the contact alarm mechanism 6 does not give out alarm sound, so that the position of the steel wire rope is correct, and the hoisting of the culvert can be normally carried out; the wire rope is not in the positioning groove 21, which indicates that the wire rope is in error, the operation of hoisting culvert sections cannot be performed, and the transverse bearing beam 2 is also in an open state at the moment, and the contact alarm mechanism 6 can send an alarm to remind on-site staff.
Referring to fig. 2 and 3, the pressing closing mechanism 5 includes a pressing block 51, a horizontal pushing block 52, and an abutment block 53; a first vertical channel 22 is vertically formed below the positioning groove 21 in the transverse bearing beam 2, and a pressing block 51 is slidably inserted into the first vertical channel 22; a transverse channel 23 is horizontally arranged in the transverse bearing beam 2, the transverse channel 23 is vertical to and communicated with the first vertical channel 22, and a horizontal pushing block 52 is slidably inserted into the transverse channel 23; a second vertical channel 24 is vertically arranged at a position, close to the end part, in the transverse bearing beam 2, and the second vertical channel 24 is also vertically communicated with one end, far away from the first vertical channel 22, of the transverse channel 23, and an abutting block 53 is vertically and slidably inserted in the second vertical channel 24; the extrusion block and the horizontal pushing block 52 and the abutting block 53 and the horizontal pushing block 52 are all attached through the inclined abutting surface 7, and when the pressing block 51 moves vertically downwards, the horizontal pushing block 52 moves in the transverse channel 23 and pushes the abutting block 53 to move vertically upwards; the connecting beam 31 is horizontally arranged on the vertical hanging beam 3, the abutting block 32 is arranged right above the abutting block 53 on the connecting beam 31, and the end part of the transverse bearing beam 2 is closed after the abutting block 53 is attached to the abutting block 32 after being moved upwards.
As shown in fig. 2 and 3, the elastic cavity 8 is formed on one side of the first vertical channel 22, the second vertical channel 24 and the lateral channel 23 along the direction of the first vertical channel, the pressing block 51, the horizontal pushing block 52 and the abutting block 53 are provided with the protruding blocks 9 extending into the elastic cavity 8, the springs 81 are arranged between each protruding block 9 and the end wall of the elastic cavity 8, the springs 81 on one side of the pressing block 51 always have a tendency to push the pressing block 51 vertically upwards, the springs 81 on one side of the horizontal pushing block 52 always have a tendency to push the horizontal pushing block 52 horizontally towards the direction close to the pressing block 51, and the springs 81 on one side of the abutting block 53 always have a tendency to push the abutting block 53 vertically downwards.
When the steel wire rope is positioned in the positioning groove 21 and the culvert is hoisted, the steel wire rope can exert pressure on the pressing block 51 due to hoisting the culvert, so that the pressing block 51 is forced to vertically move downwards; in this embodiment, the pressing block 51 and the horizontal pushing block 52 initially form an L-shape, and the end portions of the pressing block 51 and the horizontal pushing block 52 are provided with inclined joint surfaces, and the inclined angles of the two inclined joint surfaces are 45 degrees, i.e. a right angle is formed; when the pressing block 51 is pressed down, the horizontal pushing block 52 is directly pushed away to one side horizontally; the other end of the horizontal pushing block 52 and the abutting block 53 are L-shaped at first, and the inclined joint surface between the horizontal pushing block 52 and the abutting block 53 is 45 degrees; the horizontal pushing block 52 subjected to the pushing force can jack up the abutting block 53 vertically, so that the abutting block 53 contacts the abutting block 32, and finally the end part of the transverse load beam 2 is closed; namely: as long as the position of the steel wire rope can be correctly positioned in the positioning groove 21, the end part of the transverse bearing beam 2 can be automatically closed in the process of hoisting the culvert section.
However, when the wire rope is not in the positioning groove 21, under the action of the spring 81, the pressing block 51 moves vertically upwards, the horizontal pushing block 52 also resets and moves horizontally towards the first vertical channel 22 under the action of the spring 81, and finally the abutting block 53 moves vertically downwards under the action of gravity and the spring 81, the abutting block 53 is separated from the abutting block 32, and the end of the transverse load beam 2 is in an open state, namely: as long as the position of the wire rope is not in the positioning groove 21, the end of the transverse load beam 2 will automatically open.
Referring to fig. 2 and 4, the contact alarm device includes an energization alarm mechanism 61 and a power supply mechanism 62; the power supply mechanism 62 is installed on the connecting beam 31, the power-on alarm mechanism 61 is installed on the vertical hanging beam 3, the power supply mechanism 62 is used for supplying electric energy into the power-on alarm mechanism 61 when the abutting block 53 abuts against the abutting block 32, and the power-on alarm mechanism 61 is used for giving out a warning sound after power-on and closing the warning sound after power-off. Specifically, the power supply mechanism 62 includes a mounting block 621, a battery 622, and a hinge lever 623; the mounting block 621 is arranged at the end part of the connecting beam 31, a storage cavity 6211 is formed in the mounting block 621, the storage battery 622 is placed in the storage cavity 6211, a sliding cavity 6212 is formed in the mounting block 621 and positioned at the lower end of the storage cavity 6211, and the butt joint block 32 is inserted in the sliding cavity 6212 in a sliding manner; a through bar hole 6213 is vertically formed in the side wall of the sliding cavity 6212, a supporting rod 321 extending out of the through bar hole 6213 is arranged on the side wall of the butt joint block 32 close to the top, the hinge rod 623 is hinged on the connecting beam 31 through a vertical rod, and the end part of the supporting rod 321 is connected with one end of the hinge rod 623 through a tension spring; the energizing alarm mechanism 61 comprises an alarm 611 and a conductive block 612, wherein the alarm 611 is arranged on the vertical hanging beam 3, the conductive block 612 is arranged on one side of the vertical hanging beam 3 close to the hinging rod 623, and the conductive block 612 is electrically connected with the alarm 611; a conductive sheet 6231 is arranged at one end of the hinging rod 623 far away from the tension spring, and the conductive sheet 6231 is electrically connected with the storage battery 622; when the abutting block 53 abuts against the abutting block 32 to move vertically upward in the sliding chamber 6212, the end of the hinge rod 623 away from the tension spring is inclined downward and separates the conductive piece 6231 from the conductive block 612; when the abutting block 53 no longer abuts against the abutting block 32 so that the abutting block 32 moves down vertically in the strong sliding, the hinge rod 623 is in a horizontal state and the conductive sheet 6231 is attached to the conductive block 612.
When the abutting block 53 abuts against the abutting block 32 from bottom to top and pushes the abutting block 32 to vertically move upwards, the abutting rod 321 pulls one end of the hinging rod 623 to incline upwards, so that the other end of the hinging rod 623 provided with the conducting plate 6231 inclines downwards to be separated from the conducting block 612, at the moment, the storage battery 622 cannot supply electricity to the alarm 611, and the alarm 611 stops sending an alarm sound after power is off; when the abutting block 53 moves vertically downwards and is separated from the abutting block 32, the abutting block 32 naturally falls under the action of gravity to drive the abutting rod 321 to move vertically downwards, so that the abutting rod 321 pulls one end of the hinging rod 623 to change from an inclined upward state to a horizontal state, at this time, the conductive sheet 6231 is attached to the conductive block 612 again, the storage battery 622 supplies electric energy to the alarm 611, the alarm 611 emits alarm sound again, and finally the effect of controlling the alarm 611 to emit alarm sound according to the opening and closing of the end part of the transverse bearing beam 2 is achieved; namely: when the steel wire rope is not positioned in the positioning groove 21, the position of the steel wire rope on the surface is inaccurate, the alarm 611 can give out an alarm sound to prompt on-site staff, and the end part of the transverse bearing beam 2 can be opened, so that the steel wire rope can be conveniently adjusted or taken down; after the steel wire rope is positioned in the positioning groove 21, the position of the steel wire rope on the surface is accurate, the alarm 611 does not give out an alarm sound, and the end part of the transverse load beam 2 is also in a closed state.
The embodiments of the present application are all preferred embodiments of the present application, and are not intended to limit the scope of the present application, wherein like reference numerals are used to refer to like elements throughout. Therefore: all equivalent changes in structure, shape and principle of the application should be covered in the scope of protection of the application.
Claims (10)
1. The construction process of the whole-section prefabricated mounting assembly type box culvert is characterized by comprising the following steps of:
the construction steps of the culvert prefabrication operation area are as follows: firstly, rolling the surface of a prefabricated site to realize compaction and leveling, dividing the prefabricated site into a culvert storage area and a culvert prefabricated area, paving a gravel cushion layer in the culvert storage area, and pouring concrete on the surface of the culvert prefabricated area for hardening treatment;
the processing and installing steps of the steel bar are as follows: manufacturing a telescopic steel bar jig frame and steel bars in a steel bar processing field, conveying the manufactured steel bars to a culvert section prefabrication area, placing the steel bars in the telescopic steel bar jig frame for welding and binding, and embedding culvert section hanging rings in the process of installing and connecting the steel bars to manufacture a steel bar framework;
prefabricating the horizontal culvert sections: the culvert section template adopts a shaping steel template and consists of an outer mold, an inner mold and a bottom mold, wherein the inner mold is firstly installed in the steel reinforcement framework when the culvert section template is assembled, and after the steel reinforcement framework is integrally lifted and positioned, an outer layer steel reinforcement protection layer cushion block is arranged on the periphery of the steel reinforcement framework, and then the outer mold is installed on the outer side of the steel reinforcement framework;
and (3) concrete pouring of the culvert sections: filling concrete into the mould body, and vibrating the concrete in the mould body through an inserted vibrator; when the plug-in vibrator is used, the moving distance should not exceed 1.5 times of the acting radius of the vibrator, and the distance between the vibrator and the side mould should be kept between 5cm and 10 cm; the vibrator is inserted into the lower layer concrete for 5 cm-10 cm to fully combine the two layers of concrete, the inserted vibrator is taken out after the vibration is finished, and the vibrator is covered and sprayed with water for curing after the slurry is recovered, and the curing period is 7 days;
the construction steps of the site foundation are as follows: carrying out foundation pit excavation on site and simultaneously prefabricating the culvert sections, wherein the foundation pit construction is carefully matched with the prefabricating progress of the culvert sections, so that the situations that the foundation pit is excavated and then immersed in water and the like are prevented, and the foundation pit excavation is carried out after the prefabricating of the culvert sections of the construction culvert is basically completed; when the foundation pit is excavated, strictly forbidden to be overdrawn, reserving 20cm before mechanically excavating to a substrate, and then manually excavating to a designed elevation; if the over-digging condition occurs, the loose part is removed, and then the substrate is treated;
and (3) storage and transportation of culvert sections: when the strength of the concrete of the culvert section reaches 85% or more of the designed strength, lifting the culvert section to a culvert section storage area by adopting a portal crane; during loading, the culvert sections are lifted to a transport vehicle through a portal crane, and are lifted to a flat site in a horizontal posture after being transported to the site, and a rubber tire support pad is arranged below the culvert sections;
and (3) a culvert section overturning step: the crane adopts a T-shaped hanging head (1), unhook prevention devices (4) are arranged at the two ends of the T-shaped hanging head (1), steel wire ropes are hung on the two sides of the T-shaped hanging head (1), a U-shaped clamping ring is sleeved below each steel wire rope, a pulley is arranged on a pin of the U-shaped clamping ring, a section of steel wire rope is hung on the pulley, the lower end of the section of steel wire rope hung on the pulley is connected with a hanging ring pre-buried in a culvert section top plate to form a fixed pulley block, and then the crane is started to overturn the culvert section;
and (3) butt joint installation of culvert sections: after the previous section culvert section is hoisted in place, a water stop strip and a coating sealant are attached to the contact surface of the culvert section, then a spring line is arranged along the discovery direction of the end position of the previous section culvert section, the spring line is used as a reference basis for installing the next section culvert section, and then each section culvert section is butted according to the direction of the spring line.
2. The construction process for the whole-segment prefabrication and installation assembly type box culvert according to claim 1, wherein in the construction step of a culvert prefabrication operation area, a prefabrication site is leveled through a bulldozer, a vibratory roller with the thickness of 20T is continuously used for rolling after leveling, a 20cm gravel cushion layer is paved in a culvert storage area, hardening treatment is carried out on the culvert prefabrication area through 10cm thick C20 concrete, and screw steel with the nominal diameter of 12mm is arranged below a culvert prefabrication pedestal.
3. The whole-segment prefabrication and installation assembly type box culvert construction process according to claim 1, wherein in the step of constructing the culvert prefabrication operation area, a drainage ditch is preset when a prefabrication site is hardened.
4. The whole-segment prefabricated mounting assembly type box culvert construction process according to claim 1, wherein in the step of concreting the culvert sections, the concreting is performed at the most favorable time in one day; in summer construction, concrete construction of culverts is selected in the morning and evening with lower temperature, and the high-temperature time periods of noon and afternoon are avoided; during winter construction, the method is carried out in a time period with high air temperature in one day, namely, in the morning and noon, and the time periods before and after the evening and sunrise are avoided.
5. The whole-section prefabricated mounting assembly type box culvert construction process according to claim 1, wherein in the culvert overturning step, the T-shaped hanging head (1) comprises a transverse bearing beam (2) and a vertical hanging beam (3), and the vertical hanging beam (3) is vertically arranged in the middle of the transverse bearing beam (2); the unhooking prevention device (4) comprises a pressing closing mechanism (5) and a contact alarm mechanism (6); the pressing closing mechanism (5) is arranged on the transverse bearing beam (2), and the contact alarm mechanism (6) is arranged on the vertical hanging beam (3); a positioning groove (21) is formed in the upper surface of the transverse bearing beam (2), the positioning groove (21) is used for hanging a steel wire rope, and after the steel wire rope is pressed into the positioning groove (21), the pressing closing mechanism (5) automatically closes the end part of the transverse bearing beam (2) after being pressed by the steel wire rope; when the steel wire rope is moved out of the positioning groove (21) or pressure is not applied to the positioning groove (21), the pressing closing mechanism automatically opens the end part of the transverse bearing beam (2); the contact alarm mechanism (6) automatically alarms when the end part of the transverse bearing beam (2) is opened, and automatically cuts off power when the end part of the transverse bearing beam (2) is closed.
6. The whole-segment prefabricated mounting assembly type box culvert construction process according to claim 5, wherein the pressing closing mechanism (5) comprises a pressing block (51), a horizontal pushing block (52) and an abutting block (53); a first vertical channel (22) is vertically formed in the transverse bearing beam (2) and positioned below the positioning groove (21), and the pressing block (51) is inserted in the first vertical channel (22) in a sliding manner; a transverse channel (23) is horizontally arranged in the transverse bearing beam (2), the transverse channel (23) is vertical to and communicated with the first vertical channel (22), and the horizontal pushing block (52) is slidably inserted into the transverse channel (23); a second vertical channel (24) is vertically arranged at a position, close to the end part, in the transverse bearing beam (2), the second vertical channel (24) is also vertically communicated with one end, far away from the first vertical channel (22), of the transverse channel (23), and the abutting block (53) is vertically and slidably inserted in the second vertical channel (24); the pressing block (51) moves vertically downwards, and the horizontal pushing block (52) displaces in the transverse channel (23) and pushes the pushing block (53) to move vertically upwards; the vertical hanging beam (3) is horizontally provided with a connecting beam (31), a butt joint block (32) is arranged right above the butt joint block (53) on the connecting beam (31), and the butt joint block (53) is closed at the end part of the transverse bearing beam (2) after being attached to the butt joint block (32) after being moved upwards.
7. The construction process for the whole-segment prefabricated assembled box culvert according to claim 6, wherein the elastic cavity (8) is formed in one side of the first vertical channel (22), the second vertical channel (24) and the transverse channel (23) along the direction of the first vertical channel, the protruding blocks (9) extending into the elastic cavity (8) are arranged on the pressing block (51), the horizontal pushing block (52) and the abutting block (53), springs (81) are arranged between each protruding block (9) and the end wall of the elastic cavity (8), the springs (81) on one side of the pressing block (51) always have a trend of pushing the pressing block (51) vertically upwards, the springs (81) on one side of the horizontal pushing block (52) always have a trend of pushing the horizontal pushing block (52) horizontally in a direction close to the pressing block (51), and the springs (81) on one side of the abutting block (53) always have a trend of pushing the abutting block (53) vertically downwards.
8. The whole-segment prefabricated mounting assembly type box culvert construction process according to claim 6, wherein the contact alarm device comprises an energizing alarm mechanism (61) and a power supply mechanism (62); the power supply mechanism (62) is arranged on the connecting beam (31), the electrifying alarm mechanism (61) is arranged on the vertical hanging beam (3), the power supply mechanism (62) is used for supplying electric energy into the electrifying alarm mechanism (61) when the abutting block (53) abuts against the abutting block (32), and the electrifying alarm mechanism (61) is used for giving out an alarm sound after electrifying and closing the alarm sound after power-off.
9. The whole-segment prefabricated mounting assembly type box culvert construction process according to claim 8, wherein the power supply mechanism (62) comprises a mounting block (621), a storage battery (622) and a hinging rod (623); the mounting block (621) is arranged at the end part of the connecting beam (31), a storage cavity (6211) is formed in the mounting block (621), the storage battery (622) is placed in the storage cavity (6211), a sliding cavity (6212) is formed in the mounting block (621) and located at the lower end of the storage cavity (6211), and the butt joint block (32) is inserted in the sliding cavity (6212) in a sliding mode; a through strip hole (6213) is vertically formed in the side wall of the sliding cavity (6212), a supporting rod (321) extending out of the through strip hole (6213) is arranged on the side wall, close to the top, of the butt joint block (32), the hinging rod (623) is hinged to the connecting beam (31), and the end part of the supporting rod (321) is connected with one end of the hinging rod (623) through a tension spring; the power-on alarm mechanism (61) comprises an alarm (611) and a conductive block (612), the alarm (611) is arranged on the vertical hanging beam (3), the conductive block (612) is arranged on one side, close to the hinge rod (623), of the vertical hanging beam (3), and the conductive block (612) is electrically connected with the alarm (611); a conductive sheet (6231) is arranged at one end of the hinging rod (623) far away from the tension spring, and the conductive sheet (6231) is electrically connected with the storage battery (622); when the abutting block (53) abuts against the abutting block (32) to vertically move upwards in the sliding cavity (6212), one end of the hinging rod (623) away from the tension spring is inclined downwards, and the conductive sheet (6231) is separated from the conductive block (612); when the abutting block (53) is not abutted against the abutting block (32) any more so that the abutting block (32) vertically moves down in the strong sliding, the hinging rod (623) is in a horizontal state and the conductive sheet (6231) is attached to the conductive block (612).
10. The construction process of the whole-segment prefabricated mounting assembly type box culvert according to claim 1, wherein in the step of butt-joint mounting of the culvert segments, the sealant is a two-component polysulfide sealant, and the water stop bar is a water-swelling water stop bar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310664734.9A CN116876562A (en) | 2023-06-06 | 2023-06-06 | Construction process for prefabricated mounting assembled box culvert of whole section |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310664734.9A CN116876562A (en) | 2023-06-06 | 2023-06-06 | Construction process for prefabricated mounting assembled box culvert of whole section |
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| CN116876562A true CN116876562A (en) | 2023-10-13 |
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| CN202310664734.9A Pending CN116876562A (en) | 2023-06-06 | 2023-06-06 | Construction process for prefabricated mounting assembled box culvert of whole section |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117208747A (en) * | 2023-11-09 | 2023-12-12 | 中铁三局集团有限公司 | Hanging device applied to super-long culvert construction by segmented prefabrication culvert section method |
-
2023
- 2023-06-06 CN CN202310664734.9A patent/CN116876562A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117208747A (en) * | 2023-11-09 | 2023-12-12 | 中铁三局集团有限公司 | Hanging device applied to super-long culvert construction by segmented prefabrication culvert section method |
| CN117208747B (en) * | 2023-11-09 | 2024-01-23 | 中铁三局集团有限公司 | Hanging device applied to super-long culvert construction by segmented prefabrication culvert section method |
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