CN116101892A - Vertical prefabricated box culvert lifting and overturning system and construction method thereof - Google Patents

Abstract

The invention discloses a vertical prefabricated box culvert lifting and overturning system and a construction method thereof. The invention has simple structure and convenient operation, and realizes ordered lifting, lifting and turning construction of the prefabricated box culvert with minimum cost by reasonably planning the prefabricated lifting area and the lifting and turning area and matching with the use of the running track and the gantry crane.

Description

Vertical prefabricated box culvert lifting and overturning system and construction method thereof

Technical Field

The invention relates to the technical field of precast box culvert construction, in particular to a vertical precast box culvert lifting and overturning system and a construction method thereof.

Background

Along with the development and utilization of urban underground space, the underground pipe gallery technology is gradually developed and matured, and the prefabricated box culvert is taken as an essential component of the underground pipe gallery, so that the manufacturing and the transportation are important. When the prefabricated box culvert adopts the vertical prefabricated mode, the top surface of the box culvert is upward by detaching the box culvert from the tightly-adhered bottom die and lifting the box culvert to a turnover area after pouring construction of the prefabricated section of the box culvert is completed.

The surface of the prefabricated box culvert body is smooth and has no hanging point, and the surface of the culvert body cannot be damaged in the lifting and turning process, so that the lifting and turning construction difficulty of the prefabricated box culvert is high. The existing lifting mode generally adopts a flexible rope to lift the whole box culvert after wrapping, and the most common is to directly use a hemp rope to lift the box culvert, but because the dead weight of the box culvert is extremely large, the box culvert which is regular in shape, is externally Zhou Guanghua and is not provided with an anti-falling structure is extremely easy to fall off the box culvert due to acceleration and deceleration in the lifting process, and has extremely large potential safety hazard, and the hemp rope is extremely easy to wear and needs to be replaced at high frequency, so that the box culvert not only occupies large volume, but also has higher labor cost for frequent replacement. The existing overturning mode is to arrange a hanging ring or hanging bar on a culvert body in an embedded mode to serve as a hanging point, the hanging ring or hanging bar is required to be welded and connected with a box culvert reinforcement cage in order to ensure the pulling-out resistance of the hanging ring or hanging bar, and the hanging ring or hanging bar is limited in burial depth, and the hanging ring or hanging bar is directly matched with a lifting overturning mode of a steel wire rope to easily cause the cracking of the culvert body due to oblique traction of the steel wire rope, so that the hanging ring or hanging bar is required to be matched with a special overturning lifting tool for use in lifting and overturning, the special overturning lifting tool is relatively complicated in operation, high in construction difficulty, high in operation requirement on constructors and capable of reducing construction efficiency to a certain extent; in addition, as the hanging rings or hanging bars are required to be cut when the top of the box culvert is subjected to waterproof treatment, the subsequent secondary cutting construction can further reduce the construction efficiency and bring about the increase of labor cost.

Disclosure of Invention

The invention aims to provide a vertical prefabricated box culvert lifting and overturning system and a construction method thereof, which are used for solving the technical problems in the background technology.

In order to achieve the technical purpose, the invention adopts the following technical scheme:

the vertical prefabricated box culvert lifting and overturning system comprises two running rails which are arranged in parallel, a prefabricated lifting area and a lifting overturning area are sequentially arranged between the running rails from front to back, a gantry lifting frame is arranged between the two running rails in a crossing mode, supporting legs of the gantry lifting frame are slidably arranged on the running rails through running mechanisms, locking of the gantry lifting frame on the running rails can be achieved through the running mechanisms, a transverse moving trolley is arranged on a cross beam of the gantry lifting frame, transverse moving and locking can be achieved on the cross beam of the gantry lifting frame, a winding mechanism is arranged in a vehicle body, a lifting hook is arranged at the tail end of a steel wire rope wound on the winding mechanism, the lifting hook is hung below the vehicle body, and a lifting sling for vertical lifting and horizontal transportation of the prefabricated box culvert or an overturning sling for overturning the prefabricated box culvert from a vertical posture to a horizontal posture are detachably connected to the lifting hook;

the lifting sling comprises a supporting frame and a connecting screw rod, the supporting frame is arranged above a box culvert body of the prefabricated box culvert, a lifting lug fixedly arranged at the top end of the supporting frame is connected with the lifting hook through a steel wire rope, the connecting screw rod is arranged in a stretching pore canal of the prefabricated box culvert in a penetrating manner, the top end of the connecting screw rod penetrates through the supporting frame and is fixedly connected with the supporting frame through a supporting plate and a fastening nut, and the bottom end of the connecting screw rod extends into a connecting box of the prefabricated box culvert and is fixedly connected with the box culvert body through the supporting plate and the fastening nut;

the overturning lifting appliance comprises four lengthened round head lifting nails and duckbill lifting hooks, wherein the four lengthened round head lifting nails are buried on a box culvert body top plate according to the design position and are fixedly bound with a steel reinforcement cage inside the box culvert body, one end of each duckbill lifting hook is connected to the outer side end part of each lengthened round head lifting nail, and the other end of each duckbill lifting hook is hung on each lifting hook through a steel wire rope.

Preferably, the connecting screw between the support frame and the box culvert body is sleeved with a supporting sleeve, the supporting sleeve is clamped between the support frame and the box culvert body, the support frame and the box culvert body can be always guaranteed to be in a parallel state, the installation operation of the support frame is simplified, and the stability of the box culvert during hoisting is improved.

Preferably, in order to avoid the box culvert body to receive the damage of colliding with when overturning, handling upset district is provided with the sand pit, and sand pit week side is provided with round protection rail.

Preferably, in order to further increase the burying depth of the lengthened round head hanging nails, four lengthened round head hanging nails are correspondingly arranged at four corners of the box culvert body top plate, and the lengthened round head hanging nails are arranged at the thickened corner areas of the box culvert body top plate and the side plates.

Preferably, the box culvert body roof department that the extension button set up the position is provided with the arc recess of indent, and extension button outside end is located the arc recess, and extension button outside terminal surface does not surpass the notch of arc recess, and the setting of arc recess both can provide the space of placing for the duckbill lifting hook, can increase the area of contact with the duckbill lifting hook to a certain extent again, avoids the stress to concentrate excessively, prevents to contain the body fracture, simultaneously, can also guarantee that extension button outside end does not stretch out prefabricated box culvert top surface, avoids the secondary cutting procedure.

Preferably, the cross beam at the top end of the gantry crane is provided with two parallel cross beams, the trolley body of the traversing trolley is spanned between the two cross beams and is in sliding fit with the two cross beams, and the steel wire rope between the trolley body and the lifting hook is suspended in a gap between the two cross beams.

Preferably, in order to improve structural stability of the gantry crane, the supporting legs of the gantry crane are of a trapezoid frame structure with small upper part and large lower part, and the cross bars in the trapezoid frame structure are arranged in parallel with the running tracks.

In addition, the invention also provides a construction method for lifting and turning by using the vertical prefabricated box culvert lifting and turning system, which comprises the following steps:

prefabricating a box culvert, carrying out box culvert body reinforcement binding, reinforcement cage hoisting in place, reserving a tensioning duct and a connecting box, pre-burying lengthened round head hanging nails and carrying out concrete pouring construction in a prefabricating hoisting area;

step two, demolding the prefabricated box culvert, and removing the templates on the periphery of the box culvert body after the concrete of the box culvert body reaches the design strength;

step three, installing a lifting sling, penetrating a connecting screw rod from a tensioning pore canal, placing a supporting pallet and a fastening nut at a connecting box position for reinforcement treatment, installing a supporting frame, penetrating the top of the connecting screw rod through the supporting frame, and performing reinforcement treatment through the supporting pallet and the fastening nut;

step four, vertically hoisting and horizontally hoisting the prefabricated box culvert, connecting a lifting lug at the top end of a supporting frame with a hoisting lifting hook through a steel wire rope, vertically hoisting the box culvert body away from a template at the bottom of the box culvert body through a winding mechanism in the vehicle body, and then driving a gantry crane to move the box culvert body from a prefabricated hoisting area to a hoisting overturning area along a travelling track through a travelling mechanism;

step five, replacing the overturning lifting appliance, locking a gantry lifting appliance in place on a running track through a track locking device of a running mechanism, then, lowering a box culvert body into a sand pit of a lifting overturning area through a rolling mechanism in a vehicle body, paying attention to adjust the direction of the box culvert body in the lowering process, enabling a top plate of the box culvert body in place to be perpendicular to the extending direction of a cross beam of the gantry lifting appliance, removing the lifting appliance, installing a duckbill lifting hook at the exposed end of a lengthened round head lifting nail, and connecting the duckbill lifting hook to the lifting hook through a steel wire rope;

step six, turning over the prefabricated box culvert, and moving the transverse trolley from one side of the top plate of the box culvert body to one side of the bottom plate of the box culvert body to adjust the box culvert body from a vertical posture to a horizontal posture.

Preferably, the inboard body of rod of extension button is fixed through tying up silk and box body steel reinforcement cage ligature, and its outside end wears to establish inside the rubber bowl cover, the rubber bowl cover includes the bowl cover body of hemisphere shell form, the first bolt hole that wears to supply extension button to pass is seted up at the middle part of bowl cover body evagination one side, and bowl cover body evagination one side still is provided with an assembly seam, the assembly seam runs through first bolt hole, and can break open the bowl cover body along the assembly seam and make the aperture grow of first bolt hole, and bowl cover body bowl mouth one side is provided with a pair of concave baffle, baffle inboard an organic whole is fixed with the mud baffle, the bowl mouth of bowl cover body is sealed to the mud baffle, and the second bolt hole that wears to install the tie bolt is seted up at the middle part of mud baffle, and the second bolt hole both sides are worn to correspond and are seted up the dismantlement hole, the tie bolt is from inside and outside in proper order run through mud baffle and template, and tie bolt is located the inside the one end perpendicular fixed with the boss that the bowl cover body, and support screw nut is supported closely with the screw nut on the screw nut of support nut, support nut is supported with the screw nut on the screw nut of support nut.

Compared with the prior art, the invention has the beneficial effects that:

1. the invention has simple structure and convenient operation, and realizes orderly hoisting, hoisting and overturning construction of the prefabricated box culvert with minimum cost by reasonably planning the prefabricated hoisting area and the hoisting and overturning area and matching with the use of the running track and the gantry crane;

2. the invention realizes the stable connection of the lifting sling and the prefabricated box culvert through the optimized design of the lifting sling, ensures that the lifting sling and the prefabricated box culvert are always positioned on the same horizontal plane after being lifted, and avoids the problem of damage to the box culvert caused by overlarge local stress due to shaking and inclination of the box culvert;

3. the invention provides a simple and reliable overturning lifting appliance through the organic combination of the lengthened round head lifting nails, the duckbill lifting hooks, the gantry lifting frames and the transverse trolley, reduces the construction cost, effectively improves the construction efficiency of the prefabricated box culvert for lifting and turning over, further ensures the tensile pulling capacity of the lengthened round head lifting nails through the optimization improvement of the conventional embedded position and the addition of the arc-shaped grooves, avoids the cracking of the prefabricated box culvert body, and does not need the subsequent secondary cutting procedure, thereby achieving the purposes of reducing the cost, improving the quality and enhancing the efficiency.

Drawings

The foregoing and/or other aspects and advantages of the present invention will become more apparent and more readily appreciated from the detailed description taken in conjunction with the following drawings, which are meant to be illustrative only and not limiting of the invention, wherein:

FIG. 1 is a schematic diagram of a structure of the invention when a prefabricated box culvert is lifted and moved;

FIG. 2 is a schematic diagram of the structure of the invention when the prefabricated box culvert is turned over;

FIG. 3 is a schematic view of the structure of the lifting appliance in the use state of the invention;

fig. 4 is a schematic diagram of a front view structure of the lifting appliance in a use state of the lifting appliance;

FIG. 5 is a schematic view of the structure of the invention in the state of use of the flip spreader;

FIG. 6 is a schematic cross-sectional view of a preformed box culvert of the invention;

FIG. 7 is a schematic view of the duckbill hook of the present invention;

FIG. 8 is a schematic view of the construction of the invention when the elongated rounded head studs are pre-embedded;

FIG. 9 is a schematic view of a disassembled structure of an embedded part of an elongated round head hanging nail according to the invention in a side view;

fig. 10 is a schematic view of a disassembled structure of the other side of the embedded portion of the elongated rounded head hanging nail according to the present invention.

Reference numerals: 1-prefabricated box culverts, 101-box culvert bodies, 102-stretch-draw tunnels, 103-connecting boxes, 104-arc-shaped grooves, 2-lifting slings, 201-supporting frames, 202-lifting lugs, 203-connecting screws, 204-supporting pallets, 205-fastening nuts, 206-supporting sleeves, 3-wire ropes, 4-gantry hangers, 401-supporting legs, 402-crossbeams, 5-traversing trolleys, 501-bodywork, 502-lifting hooks, 6-running mechanisms, 7-running rails, 8-sand pits, 9-protective fences, 10-turning slings, 1001-elongated round head lifting nails, 1002-duckbill hooks, 11-rubber bowl covers, 1101-bowl cover bodies, 1102-first through-bolt holes, 1103-assembly joints, 1104-blocking plates, 1105-slurry baffles, 1106-second through-bolt holes, 1107-disassembly holes, 12-tie bolts, 1201-supporting plates, 1202-tie screws, 1203-butterfly nuts, 13-templates.

Detailed Description

Hereinafter, an embodiment of a vertical prefabricated box culvert lifting and turning system and a construction method thereof of the present invention will be described with reference to the accompanying drawings. The examples described herein are specific embodiments of the present invention, which are intended to illustrate the inventive concept, are intended to be illustrative and exemplary, and should not be construed as limiting the invention to the embodiments and scope of the invention. In addition to the embodiments described herein, those skilled in the art can adopt other obvious solutions based on the disclosure of the claims and specification of the present application, including those adopting any obvious substitutions and modifications to the embodiments described herein.

In the description of the present invention, it should be noted that the terms "front", "rear", "left", "right", "top", "bottom", "upper", "lower", "inner", "outer", "transverse", "longitudinal", and the like indicate an azimuth or a positional relationship based on the azimuth or the positional relationship shown in the drawings, and are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or element to be referred to must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The drawings in the present specification are schematic views, which assist in explaining the concept of the present invention, and schematically show the shapes of the respective parts and their interrelationships. Note that, in order to clearly show the structures of the components of the embodiments of the present invention, the drawings are not drawn to the same scale. Like reference numerals are used to denote like parts.

The principles and features of the present invention are described below with reference to the drawings, the illustrated embodiments are provided for illustration only and are not intended to limit the scope of the present invention. The preferred embodiment of the present invention is described in further detail below in conjunction with fig. 1-10:

as shown in fig. 1-10, the vertical prefabricated box culvert lifting and overturning system comprises two running rails 7 which are arranged in parallel, wherein a prefabricated lifting area and a lifting and overturning area are sequentially arranged between the running rails 7 from front to back, a gantry crane 4 is arranged between the two running rails 7 in a crossing manner, a supporting leg 401 of the gantry crane 4 is slidably arranged on the running rails 7 through a running mechanism 6, the running mechanism 6 is provided with a motor system for driving the gantry crane 4 to run along the running rails 7 and an electric hydraulic rail clamping device for realizing the locking of the gantry crane 4 on the running rails 7, a transverse trolley 5 is arranged on a cross beam 402 of the gantry crane 4, the transverse trolley 5 can realize the transverse movement and locking on the cross beam 402 of the gantry crane 4, a winding mechanism is arranged in the vehicle body 501, a lifting hook 502 is arranged at the tail end of a steel wire rope 3 wound on the winding mechanism, the lifting hook 502 is suspended below the vehicle body 501, the transverse trolley 5 is arranged on the cross beam 402 of the gantry crane 4 in order to avoid the blocking of the movement of the gantry crane 4, the transverse trolley 4 is provided with two parallel lifting hooks, the transverse trolley 5 are arranged on the cross beam 402 and the transverse trolley body 501 and the transverse trolley body 4 is matched with the transverse trolley body 4 in a trapezoidal structure for enhancing the strength of the transverse trolley body 4, and the transverse trolley body 4 is provided with a transverse girder structure between the transverse trolley body 4 and the transverse trolley body is provided with a transverse lifting hook 501;

the lifting hook 502 is detachably connected with a lifting sling 2 for vertical lifting and horizontal transportation of the prefabricated box culvert 1 or a turning sling 10 for turning the prefabricated box culvert 1 from a vertical posture to a horizontal posture;

as shown in fig. 3-4, the lifting sling 2 comprises a supporting frame 201 and a connecting screw 203, the supporting frame 201 is arranged above a box culvert body 101 of the prefabricated box culvert 1, a lifting lug 202 fixedly arranged at the top end of the supporting frame is connected with a lifting hook 502 through a steel wire rope 3, the connecting screw 203 is arranged in a tensioning duct 102 of the prefabricated box culvert 1 in a penetrating manner, the top end of the connecting screw 203 penetrates through the supporting frame 201 and is fixedly connected with the supporting frame 201 through a supporting plate 204 and a double-layer fastening nut 205, a supporting sleeve 206 is sleeved on the connecting screw 203 between the supporting frame 201 and the box culvert body 101, and the bottom end of the connecting screw 203 extends into a connecting box 103 of the prefabricated box culvert 1 and is fixedly connected with the box culvert body 101 through the supporting plate 204 and the double-layer fastening nut 205;

as shown in fig. 5-10, the overturning lifting appliance 10 comprises four elongated round head lifting nails 1001 and duckbill lifting hooks 1002, the four elongated round head lifting nails 1001 are correspondingly arranged at four corners of the top plate of the box culvert body 101 and are bound and fixed with the reinforcement cage inside the box culvert body 101, the elongated round head lifting nails 1001 are arranged at the thickened corner areas of the top plate and the side plates of the box culvert body 101, the top plate of the box culvert body 101 at the position where the elongated round head lifting nails 1001 are arranged is provided with concave arc-shaped grooves 104, the outer ends of the elongated round head lifting nails 1001 are positioned in the arc-shaped grooves 104, the outer end faces of the elongated round head lifting nails 1001 do not exceed the notch of the arc-shaped grooves 104, the outer ends of the elongated round head lifting nails 1001 are connected with steel wire ropes 3 through the duckbill lifting hooks 1002, the hook heads of the duckbill lifting hooks 1002 are connected with the elongated round head lifting nails 1001 in the arc-shaped grooves 104, and the other ends of the duckbill lifting hooks 1002 are hung on the lifting hooks 502 through the steel wire ropes 3;

as shown in fig. 1-2, in order to prevent the prefabricated box culvert 1 from being knocked and damaged in the overturning process, a sand pit 8 is arranged in the lifting overturning area, and a circle of protective fence 9 is arranged on the periphery of the sand pit 8.

In addition, the invention also provides a construction method for lifting and turning by using the vertical prefabricated box culvert lifting and turning system, which comprises the following steps:

step one, prefabricating a box culvert 1, prefabricating and constructing, namely, carrying out steel bar binding of a box culvert body 101, hoisting a steel bar cage in place, reserving a stretching hole 102 and a connecting box 103 in a prefabricating and lifting area, pre-burying a lengthened round head hanging nail 1001 and carrying out concrete pouring construction, wherein pre-burying the lengthened round head hanging nail 1001 is realized by assisting a rubber bowl cover 11, a rod body at the inner side of the lengthened round head hanging nail 1001 is bound and fixed with the steel bar cage of the box culvert body 101 through binding wires, the outer side end of the lengthened round head hanging nail 1001 is penetrated and arranged in the rubber bowl cover 11, the rubber bowl cover 11 comprises a hemispherical bowl cover body 1101, a first through hole 1102 for the lengthened round head hanging nail 1001 to penetrate is formed in the middle of the outer side of the bowl cover body 1101, an assembly seam 1103 is further formed in the outer side of the bowl cover body 1101, the assembly seam 1103 penetrates through the first through hole 1102, the assembly seam 1103 can be opened along the assembly seam 1103 so that the aperture of the first through hole 1102 is enlarged, a pair of concave baffle plates 1104 are integrally arranged on one side of the bowl mouth of the bowl cover body 1101, a mud baffle plate 1105 is integrally fixed on the inner side of the baffle plates 1104, the mud baffle plate 1105 seals the bowl mouth of the bowl cover body 1101, a second bolt penetrating hole 1106 for installing a tie bolt 12 is formed in the middle of the mud baffle plate 1105, dismounting holes 1107 are correspondingly formed on two sides of the second bolt penetrating hole 1106, the tie bolt 1202 of the tie bolt 12 penetrates through the mud baffle plate 1105 and the template 13 from inside to outside in sequence, a supporting plate 1201 is vertically fixed on one end of the tie bolt 1202 positioned in the bowl cover body 1101, the supporting plate 1201 abuts against a nut cap of the lengthened round head hanging nail 1001, the mud baffle plate 1105 is in threaded fit with the tie bolt 1202, and in cooperation with a butterfly nut 1203 sleeved on the tie bolt 1202 on the outer side of the template 13 tightly presses the bowl cover body 1101 on the template 13, in order to prevent the lengthened round head hanging nail 1001 from being accidentally separated from the bowl cover body 1101, the aperture of the first bolt penetrating hole 1102 is required to be smaller than the nail head size of the lengthened round head hanging nail 1001, when the bowl cover is installed, the bowl cover body 1101 is only required to be broken along the assembling seam 1103 to enlarge the opening width of the first bolt penetrating hole 1102, then the drawknot bolt 12 is penetrated, the bowl cover body 1101 is sleeved on the lengthened round head hanging nail 1001, and after the bowl cover body 1101 is loosened, the assembling seam 1103 is closed again under the action of self-elastic force so as to avoid later concrete filling;

step two, demolding the prefabricated box culvert 1, after the concrete of the box culvert body 101 reaches the design strength, firstly removing the butterfly nut 1203, removing the template 13 on the periphery side of the box culvert body 101, and then inserting two short steel bars from the disassembly holes 1107 and forcefully crossing the two short steel bars to open and remove the rubber bowl cover 11;

step three, installing a lifting sling 2, penetrating a connecting screw 203 from a tensioning hole 102, placing a supporting pallet 204 and a double-layer fastening nut 205 at the position of a connecting box 103 for reinforcement treatment, sleeving a supporting sleeve 206 on the connecting screw 203 above the box culvert body 101, installing a supporting frame 201, penetrating the top of the connecting screw 203 through the supporting frame 201, and carrying out reinforcement treatment through the supporting pallet 204 and the double-layer fastening nut 205;

step four, vertically hoisting and horizontally hoisting the prefabricated box culvert 1, connecting a lifting lug 202 at the top end of a supporting frame 201 with a hoisting hook 502 through a steel wire rope 3, vertically hoisting the box culvert body 101 away from a template 13 at the bottom of the box culvert body 101 through a winding mechanism in a vehicle body 501, and then driving a gantry crane 4 to move the box culvert body 101 from a prefabricated hoisting area to a hoisting overturning area along a travelling rail 7 through a motor system of a travelling mechanism 6;

step five, replacing the overturning lifting appliance 10, after the box culvert body 101 is lifted and moved into place, locking the gantry lifting appliance 4 which is moved into place on the walking track 7 through an electric hydraulic rail locking device of the walking mechanism 6, then lowering the box culvert body 101 into a sand pit 8 of a lifting and overturning area through a rolling mechanism in a vehicle body 501, paying attention to adjust the direction of the box culvert body 101 in the lowering process, enabling the top plate of the box culvert body 101 which is placed into place to be perpendicular to the extending direction of a cross beam 402 of the gantry lifting appliance 4, then sequentially removing a fastening nut 205, a supporting pallet 204, a supporting frame 201 and a supporting top sleeve 206, extracting a connecting screw 203 from a tensioning duct 102, installing a duckbill lifting hook 1002 at one exposed end of a lengthened round head lifting nail 1001 after the lifting appliance 2 is removed, and connecting the duckbill lifting hook 1002 to a lifting hook 502 through a steel wire rope 3;

step six, the prefabricated box culvert 1 is turned over, and the transverse trolley 5 moves from the top plate side of the box culvert body 101 to the bottom plate side of the box culvert body 101, so that the box culvert body 101 is adjusted from a vertical posture to a horizontal posture.

The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the invention are intended to be included within the scope of the invention.

Claims (9)

1. A vertical prefabricated box culvert lifts by crane upset system which characterized in that: the automatic lifting device comprises two parallel running rails (7), wherein a prefabricated lifting area and a lifting turnover area are sequentially arranged between the running rails (7) from front to back, a gantry lifting hook (4) is arranged between the two running rails (7) in a crossing mode, a supporting leg (401) of the gantry lifting hook (4) is slidably arranged on the running rails (7) through a running mechanism (6), the running mechanism (6) can realize locking of the gantry lifting hook (4) on the running rails (7), a transverse moving trolley (5) is arranged on a cross beam (402) of the gantry lifting hook (4), the transverse moving trolley (5) can realize transverse moving and locking on the cross beam (402) of the gantry lifting hook (4), a winding mechanism is arranged inside a vehicle body (501), the tail end of a steel wire rope (3) wound on the winding mechanism is provided with a lifting hook (502), the lifting hook (502) is suspended below the vehicle body (501), and the lifting hook (502) can be detachably connected with a lifting sling (2) for vertical lifting and horizontal transportation of a prefabricated box (1) or a vertical lifting posture (10) for turning over the prefabricated box (1);

the lifting sling (2) comprises a supporting frame (201) and a connecting screw rod (203), wherein the supporting frame (201) is arranged above a box culvert body (101) of the prefabricated box culvert (1), a lifting lug (202) fixedly arranged at the top end of the supporting frame is connected with a lifting hook (502) through a steel wire rope (3), the connecting screw rod (203) is arranged in a tensioning duct (102) of the prefabricated box culvert (1) in a penetrating manner, the top end of the connecting screw rod penetrates through the supporting frame (201) and is fixedly connected with the supporting frame (201) through a supporting plate (204) and a fastening nut (205), and the bottom end of the connecting screw rod extends into a connecting box (103) of the prefabricated box culvert (1) and is fixedly connected with the box culvert body (101) through the supporting plate (204) and the fastening nut (205);

the overturning lifting appliance (10) comprises four lengthening round head lifting nails (1001) and duckbill lifting hooks (1002), the four lengthening round head lifting nails (1001) are buried on a top plate of the box culvert body (101) according to the design position and are fixedly bound with the steel reinforcement cage inside the box culvert body (101), one end of each duckbill lifting hook (1002) is connected to the outer side end part of each lengthening round head lifting nail (1001), and the other end of each duckbill lifting hook is hung on the lifting hook (502) through a steel wire rope (3).

2. The vertical precast box culvert lifting and overturning system according to claim 1, wherein: a supporting sleeve (206) is sleeved on the connecting screw rod (203) between the supporting frame (201) and the box culvert body (101).

3. The vertical precast box culvert lifting and overturning system according to claim 1, wherein: the lifting overturning area is provided with a sand pit (8), and a circle of protective fence (9) is arranged on the periphery of the sand pit (8).

4. The vertical precast box culvert lifting and overturning system according to claim 1, wherein: four lengthened round head hanging nails (1001) are correspondingly arranged at four corners of the top plate of the box culvert body (101), and the lengthened round head hanging nails (1001) are arranged at the thickened corner areas of the top plate and the side plates of the box culvert body (101).

5. The vertical precast box culvert lifting and overturning system according to claim 1, wherein: the box culvert body (101) top plate department that extension button head hung nail (1001) set up the position is provided with indent arc recess (104), and extension button head hung nail (1001) outside end is located arc recess (104), and extension button head hung nail (1001) outside terminal surface does not surpass the notch of arc recess (104).

6. The vertical precast box culvert lifting and overturning system according to claim 1, wherein: the cross beam (402) at the top end of the gantry crane (4) is provided with two parallel cross beams, a car body (501) of the traversing trolley (5) is spanned between the two cross beams (402) and is in sliding fit with the two cross beams (402), and a steel wire rope (3) between the car body (501) and the lifting hook (502) is suspended in a gap between the two cross beams (402).

7. The vertical precast box culvert lifting and overturning system according to claim 1, wherein: the landing leg (401) of the gantry crane (4) is of a trapezoid frame structure with a small upper part and a large lower part, and a cross rod in the trapezoid frame structure is arranged in parallel with the running track (7).

8. A vertical prefabricated box culvert lifting and overturning construction method applied to the construction process of the vertical prefabricated box culvert lifting and overturning system as claimed in any one of claims 1 to 7, which is characterized by comprising the following steps:

prefabricating a box culvert (1), binding steel bars of a box culvert body (101) in a prefabricating and hoisting area, hoisting a steel bar cage in place, reserving a tensioning duct (102) and a connecting box (103), pre-burying a lengthened round head hanging nail (1001), and pouring concrete;

step two, demolding the prefabricated box culvert (1), and dismantling templates (13) on the periphery of the box culvert body (101) after the concrete of the box culvert body (101) reaches the design strength;

step three, installing a lifting sling (2), penetrating a connecting screw (203) into a tensioning hole channel (102), placing a supporting plate (204) and a fastening nut (205) at the position of a connecting box (103) for reinforcement treatment, installing a supporting frame (201), penetrating the top of the connecting screw (203) through the supporting frame (201), and performing reinforcement treatment through the supporting plate (204) and the fastening nut (205);

step four, vertically hoisting and horizontally hoisting the prefabricated box culvert (1), connecting a lifting lug (202) at the top end of a supporting frame (201) with a hoisting hook (502) through a steel wire rope (3), vertically hoisting the box culvert body (101) away from a template (13) at the bottom of the box culvert body (101) through a winding mechanism in a vehicle body (501), and then driving a gantry crane (4) to move the box culvert body (101) from a prefabricated hoisting area to a hoisting overturning area along a travelling track (7) through a travelling mechanism (6);

step five, replacing a turnover lifting appliance (10), locking a gantry lifting appliance (4) in place on a running track (7) through a track locking device of a running mechanism (6), then lowering a box culvert body (101) into a sand pit (8) of a lifting turnover area through a rolling mechanism in a vehicle body (501), paying attention to the direction of the box culvert body (101) in the lowering process, enabling a top plate of the box culvert body (101) in place to be perpendicular to the extending direction of a cross beam (402) of the gantry lifting appliance (4), removing a lifting appliance (2), installing a duckbill lifting hook (1002) at the exposed end of a lengthened round head lifting nail (1001), and connecting the duckbill lifting hook (1002) to the lifting hook (502) through a steel wire rope (3);

step six, the prefabricated box culvert (1) is turned over, and the transverse trolley (5) moves from one side of a top plate of the box culvert body (101) to one side of a bottom plate of the box culvert body (101) to adjust the box culvert body (101) from a vertical posture to a horizontal posture.

9. The vertical precast box culvert lifting and overturning construction method as set forth in claim 8, wherein the method comprises the following steps: the inside body of rod of extension button head hanging nail (1001) is fixed through tying up wire and steel reinforcement cage ligature of box culvert body (101), and its outside end wears to establish inside rubber bowl cover (11), rubber bowl cover (11) are including half spherical shell form bowl cover body (1101), first perforation keyhole (1102) that confession extension button head hanging nail (1001) passed are offered at the middle part of bowl cover body (1101) evagination one side, and bowl cover body (1101) evagination one side still is provided with an assembly seam (1103), assembly seam (1103) runs through first perforation keyhole (1102), and along assembly seam (1103) can break open bowl cover body (1101) and make the aperture grow of first perforation keyhole (1102), bowl cover body (1101) bowl mouth one side is integrative to be provided with a pair of concave baffle (1104), baffle (1104) inboard an organic whole being fixed with of baffle (1106), baffle (1105) closes the bowl mouth of bowl cover body (1101), and second perforation (1106) that install in proper order draw-out bolt (1105) are equipped with in turn with tie bolt (1105) and draw-down bolt (1107) from both sides (13), one end of the drawknot screw (1202) positioned in the bowl cover body (1101) is vertically fixed with a supporting plate (1201), the supporting plate (1201) is abutted against a nail cap of the lengthened round head hanging nail (1001), the mud baffle (1105) is in threaded fit with the drawknot screw (1202), and the bowl cover body (1101) is tightly pressed on the template (13) by being matched with a butterfly nut (1203) sleeved on the drawknot screw (1202) at the outer side of the template (13).

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