CN115450128A - Cover plate pouring platform, equipment and construction method - Google Patents

Abstract

The application discloses a cover slab pouring platform, equipment and a construction method, which relate to the technical field of road engineering and solve the technical problem that the existing cover slab is cast in place by building a bracket, the process is complicated, time-consuming and labor-intensive. The cover pouring platform of the present application includes: at least two rails, a construction device and a lifting device. Among them, the rails are respectively installed on the side walls of the two platforms; the construction device is movably arranged on the rails and located between the two platforms; the lifting device is arranged on the rails; the construction device is lifted to the platform by the lifting device. The top of the stand to pour the cover plate used to connect the two stands. Therefore, the present application has the advantages of safe construction, simple operation, strong versatility, and convenient and fast turnover.

Description

A cover pouring platform, equipment and construction method

technical field

The present application relates to the technical field of road engineering, in particular to a cover pouring platform, equipment and construction method.

Background technique

In the prior art, during the construction of road facilities such as culverts and small bridges, the construction technology mostly adopts the scaffolding method. The construction workers usually set up a full house of scaffolding after the construction of the culvert body or abutment, and connect the roof or the connecting cover to it. The slabs are also cast-in-place for the brackets. There are many deficiencies in the construction method of this pouring method. For example, when constructing road facilities with a high platform body or a large span, in order to speed up the construction progress, when the construction personnel usually use the full culvert and full bridge method to erect the support, the erection The number of supports required by the method is large, and the erection process is time-consuming and labor-intensive; when the construction location of road facilities has poor geological conditions or involves the construction of bridges and culverts, the problem of high processing costs often occurs due to insufficient foundation bearing capacity , as well as delays in the construction period due to large water flow or harsh environment, and difficulty in erecting supports for construction personnel.

Contents of the invention

The purpose of this application is to provide a cover pouring platform, equipment and construction method, which can overcome the time-consuming and labor-intensive defects caused by erecting the pouring platform through the movable pouring platform, and the application has the advantages of improving the pouring quality, saving costs, It has the advantages of strong versatility, high safety and simple operation.

The embodiment of the application is realized like this:

The first aspect of the present application provides a cover pouring platform, including: at least two rails, a construction device and a lifting device. Among them, the rails are respectively installed on the side walls of the two platforms; the construction device is movably arranged on the rails and is located between the two platforms; the lifting device is arranged on the rails; the construction device is lifted to the platform by the lifting device The top of the body to pour the cover plate used to connect the two bodies.

In one embodiment, a plurality of reserved holes are provided on the side wall of the table body, a steel rod is arranged in a reserved hole, and a rail is connected with the plurality of steel rods.

In one embodiment, the distances between the reserved holes and the top surface of the platform are equal.

In one embodiment, the lifting device includes a plurality of lifting mechanisms, and one lifting mechanism is arranged on the top of a steel bar.

In one embodiment, the cover pouring platform further includes a plurality of rail grippers, the rail grippers are arranged on the track, and when the construction device falls on the track, the rail grippers abut against the bottom step of the construction device.

In one embodiment, the construction device includes two main longitudinal beams, one main longitudinal beam is arranged on the track next to a platform, and the two ends of the main longitudinal beams are provided with traveling wheel boxes.

In one embodiment, the construction device further includes a plurality of screw rods, and the two ends of the screw rods are respectively connected to the two main longitudinal beams.

In one embodiment, the construction device further includes a scissor brace, the scissor brace has four support ends, and two support ends are connected to a main longitudinal beam.

In one embodiment, the construction device further includes a plurality of distribution beams and a pouring formwork. Wherein, the two ends of each distribution beam are erected on the top surfaces of two main longitudinal beams respectively; the pouring formwork is covered on the top surfaces of multiple distribution beams.

In one embodiment, the cover pouring platform includes at least one working guardrail, and the working guardrail is arranged on the top surface of the construction device and spans between two platform bodies.

The second aspect of the present application provides a cover slab casting equipment, which includes at least one cover slab casting platform according to any embodiment of the first aspect of the present application.

The third aspect of the present application provides a construction method of the cover pouring equipment, including: after erecting the cover pouring equipment according to any embodiment of the second aspect of the present application, adjusting the telescopic length of the lifting device so that the construction device Jacking up to the top of the platform; pouring a cover plate for connecting the two platforms on the top surface of the construction device; after the construction device falls to the track, control the construction device to move to the bottom of the next pouring position.

The beneficial effect of this application compared with the prior art is: this application uses the cover plate pouring platform installed on the platform, and realizes the construction of the culvert under complex geological conditions without the need to build a large number of supports with a movable and lifting construction device. , The cover slab connecting the two sides of the platform can be poured at any position in the depth of the bridge, which effectively improves the pouring quality, pouring efficiency and construction safety of the cover slab, and is suitable for various working environments and working spaces, and is easy to load and unload. The application also has many advantages such as strong versatility and cost saving.

Description of drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the accompanying drawings used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, so It should be regarded as a limitation on the scope, and those skilled in the art can also obtain other related drawings based on these drawings without creative work.

Fig. 1 is a schematic structural view of a cover pouring equipment shown in an embodiment of the present application;

Fig. 2 (a) is the schematic diagram of the cross-sectional structure when the cover pouring platform shown in an embodiment of the application is applied to a culvert;

Fig. 2 (b) is a schematic diagram of the vertical section structure when the cover plate pouring platform shown in an embodiment of the present application is applied to a culvert;

Fig. 2 (c) is the partial structure schematic diagram of the cover plate pouring platform shown in one embodiment of the present application;

Fig. 3 (a) is the schematic structural diagram of the rail clamp shown in one embodiment of the present application;

Fig. 3 (b) is a schematic structural view of the rail clamp shown in an embodiment of the present application;

Fig. 3 (c) is the structural representation of the main longitudinal beam shown in an embodiment of the present application;

Fig. 4 is a schematic diagram of a cross-sectional view of a culvert in the step of processing reserved holes in the platform body and placing steel rods according to an embodiment of the present application;

Fig. 5 (a) is the cross-sectional schematic view of the culvert of the track installation step shown in an embodiment of the present application;

Fig. 5 (b) is the schematic diagram of the longitudinal section of the culvert of the track installation step shown in an embodiment of the present application;

Fig. 6 (a) is the schematic diagram of the culvert cross-section of the construction device assembling step shown in an embodiment of the present application;

Fig. 6 (b) is the schematic diagram of the longitudinal section of the culvert of the construction device assembling step shown in an embodiment of the present application;

Fig. 7 (a) is the schematic diagram of the cross-section of the culvert during the preload test shown in an embodiment of the present application;

Fig. 7 (b) is the schematic diagram of the longitudinal section of the culvert during the preload test shown in an embodiment of the present application;

Fig. 8 (a) is the schematic diagram of the longitudinal section of the culvert during the initial pouring of the cover plate shown in one embodiment of the application;

Fig. 8 (b) is a schematic diagram of the longitudinal section of the culvert when the cover plate is poured again in blocks according to an embodiment of the present application;

Fig. 9 is a schematic diagram of a longitudinal section of a culvert showing the demoulding step of a cover plate according to an embodiment of the present application;

Fig. 10 is a schematic diagram of a longitudinal section of a culvert when the construction device moves to the next pouring position according to an embodiment of the present application.

Icons: 1-cover pouring equipment; 2-cover pouring platform; 21-track; 211-steel rod; 212-rail clamp; 2121-limiting piece; Rail clamp; 2131-block; 2130-installation space; 2312-locking bolt; 22-construction device; 221-main longitudinal beam; 2210-beam body; 2211-traveling wheel box; ;2214-mobile hub;2215-installation seat;222-screw rod;223-scissors support;2231-support end;224-distribution beam;225-casting formwork;23-lifting device;231-lifting mechanism;24-working guardrail 30-foundation; 31-body; 310-settlement joint; 311-reserved hole; 32-cap; 33-cover; 330-pouring position;

detailed description

The terms "first", "second", "third" and so on are only used for distinguishing descriptions, and do not represent sequence numbers, nor can they be understood as indicating or implying relative importance.

In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are absolutely horizontal or overhanging, but may be slightly inclined. For example, "horizontal" only means that its direction is more horizontal than "vertical", and it does not mean that the structure must be completely horizontal, but can be slightly inclined.

In the description of the present application, it should be noted that the orientation or positional relationship indicated by the terms "inner", "outer", "left", "right", "upper", "lower" etc. are based on the Orientation or positional relationship, or the orientation or positional relationship that the application product is usually placed in use, is only for the convenience of describing the application and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, in order to Specific orientation configurations and operations, therefore, are not to be construed as limitations on the application.

In the description of this application, unless otherwise clearly stipulated and limited, the terms "installation", "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection , or integrally connected; it may be mechanically connected or electrically connected; it may be directly connected or indirectly connected through an intermediary, and it may be the internal communication of two components.

The technical solutions of the present application will be clearly and completely described below in conjunction with the accompanying drawings.

Please refer to FIG. 1 . FIG. 1 is a schematic structural diagram of a cover pouring equipment 1 shown in an embodiment of the present application. As shown in Figure 1, the application provides a cover pouring equipment 1, the equipment combined with previous bridge, culvert construction experience, and based on this continuous improvement, designed to form the cast-in-place culvert cover slab or small bridge slab required Self-propelled integrated construction equipment, which improves the construction efficiency of the cover slab pouring process, and reliably controls the quality, safety and environmental protection of the construction, and has strong adaptability.

Wherein, the cover casting equipment 1 includes at least one cover casting platform 2 . When the depth of the culvert or the bridge is too long, the construction progress can be accelerated by connecting more than two cover pouring platforms 2 together. In the following embodiments of the present application, only one cover pouring platform 2 is taken as an example.

Please refer to Fig. 2 (a), Fig. 2 (b), Fig. 2 (a) is the cross-sectional structure schematic diagram when the cover pouring platform 2 shown in one embodiment of the application is applied to the culvert; Fig. 2 (b) is the application A schematic diagram of the longitudinal section structure of the cover slab pouring platform 2 shown in one embodiment when it is applied to a culvert. As shown in FIG. 2( a ) and FIG. 2( b ), the cover plate pouring platform 2 includes: at least two rails 21 , a construction device 22 and a lifting device 23 . Wherein, track 21 is respectively installed on the side wall of two platform bodies 31; Construction device 22 is arranged on track 21 movably, and is positioned between two platform bodies 31; Lifting device 23 is arranged on track 21; Construction device 22 is lifted to the top of the platform body 31 by the lifting device 23 to pour a cover plate 33 for connecting the two platform bodies 31 .

Before the cover plate 33 is poured, road facilities such as culverts or bridges extend longitudinally, and both sides (both ends of the road facility itself) are composed of several sections of abutment 31 at a certain distance, and the abutment 31 in the longitudinal extension direction of the same side Settlement joints 310 are arranged between them, and settlement joints 310 refer to vertical joints set to prevent building damage caused by uneven settlement of the foundation 30 in various parts of the building. For this reason, settlement joints 310 should be set at appropriate positions such as complex plane or body shape turning points, height changes, loads, foundation 30 compressibility, and foundation 30 treatment methods that are obviously different, so as to further ensure the long-term stability of road facilities. sex.

The top of each platform body 31 is provided with a platform cap 32, and the platform body 31 is arranged on the foundation 30. In the embodiment of the present application, a cover plate pouring platform is set up on the platform body 31 on both sides of the road facility and the space between the platform body 31. 2, so that the construction personnel can rise with the construction device 22 to the space between the platform caps 32 on both sides to perform the pouring work of the cover plate 33 without erecting a support.

In order to preliminarily set up the track 21 on the platform body 31 on both sides, a plurality of reserved holes 311 are preset on the side wall of the platform body 31, and a steel rod 211 is arranged in a reserved hole 311, and a rail 21 is connected with a plurality of steel rods. The rod 211 is connected by a rail clamp 212, and a certain end of a track 21 is erected on a steel rod 211 by two rail clamps 212 to be further installed on the side wall of the table body 31. A rail 21 requires at least two steel rods. Rod 211 remains stable. On the side wall of the platform, the spacing distance between adjacent steel bars 211, and the number of reserved holes 311 or steel bars 211 on each platform body 31 are set according to construction needs. In special cases such as the heavy weight of the construction device 22 on the 21, the stability of the track 21 can be increased by increasing the number of steel rods 211 and shortening the spacing distance.

In one embodiment, in order to ensure that the track 21 erected on the steel rod 211 is parallel to the top surface of the table body 31, that is, the distance between the track 21 and the table cap 32 is equal, each reserved hole 311 is preset It is necessary to ensure that the distance between the reserved hole 311 and the top surface of the platform body 31 is equal.

Construction device 22 comprises two main longitudinal beams 221, and a main longitudinal beam 221 is located on the track 21 beside a platform body 31, and the two ends of main longitudinal beam 221 are respectively provided with a walking wheel box 2211, is located at main longitudinal beam 221 The traveling wheel box 2211 at one end is equipped with a motor 2213, and the moving wheel boxes at both ends of the main longitudinal beam 221 are equipped with moving hubs 2214, and the beam body 2210 and the moving wheel boxes at both ends form a "π"-shaped main longitudinal beam 221 .

Please refer to FIG. 2( c ). FIG. 2( c ) is a partial structural schematic view of the cover plate pouring platform 2 shown in an embodiment of the present application. Please refer to Fig. 2(a) to Fig. 2(c), there are also four installation seats 2215 on the beam body 2210 of the main longitudinal beam 221, and the installation seats 2215 are used to connect the screw rod 222 and the scissor brace used for reinforcement support 223. Both ends of the threaded rod 222 are respectively connected to the main longitudinal beams 221 next to the platform body 31 on both sides through the mounting base 2215 . The scissor brace 223 has four supporting ends 2231 , and every two supporting ends 2231 are connected to one main longitudinal beam 221 through the mounting base 2215 . Each main longitudinal beam 221 is provided with four installation seats 2215, and each installation seat 2215 is connected with a threaded mandrel 222 and the specifications of the main longitudinal beams 221 next to the platform body 31 on both sides are the same, and the positions of the installation seats 2215 are corresponding. Two supporting ends 2231 of a scissor brace 223 are also connected to the middle two installation seats 2215 of each main longitudinal beam 221 . In one embodiment, the screw rod 222 is an adjustable screw rod with adjustable length.

The construction device 22 also includes a plurality of distribution beams 224 and a casting formwork 225 . Wherein, the two ends of each distribution beam 224 are erected on the top surfaces of two main longitudinal beams 221 respectively, and the distribution beams 224 are in the shape of "I"; The formwork 225 is composed of a plurality of pouring unit plates of the same specification.

In one embodiment, the cover plate pouring platform 2 also includes at least one working guardrail 24, the working guardrail 24 is arranged on the top surface of the construction device 22, and is arranged on the edge positions of the main longitudinal beam 221, the distribution beam 224 and the pouring formwork 225 and horizontally It straddles between the two platform bodies 31 . The working guardrail 24 is used to ensure the safety of the construction personnel when pouring the cover plate 33 connecting the two platform caps 32, and prevents the construction personnel from accidentally stepping on the air and falling from a height due to negligence.

The lifting device 23 includes a plurality of lifting mechanisms 231 , and the lifting mechanisms 231 are arranged on the track 21 and located on top of the steel bar 211 . In one embodiment, the lifting mechanism 231 can be a jack. The lifting mechanism 231 is located between the main longitudinal beam 221 and the track 21. When construction personnel adjust the telescopic length of the lifting mechanism 231, the main longitudinal beam 221 can rise to the horizontal pouring position 330 of the cover plate 33 with the lifting mechanism 231 or with the lifting mechanism 231. Fall on track 21. In the following embodiments of the present application, each main longitudinal girder 221 can be lifted by two lifting mechanisms 231, and one cover pouring platform 2 can be lifted by four lifting mechanisms 231, and the lifting surface of the lifting mechanism 231 is set on each The bottom of the beam body 2210 of the main longitudinal beam 221 . In other embodiments of the present application, other numbers of lifting mechanisms 231 can be set.

In one embodiment, the cover pouring platform 2 further includes a plurality of rail clamps 213, and the rail clamps 213 are arranged on the track 21. When the main longitudinal beam 221 falls on the track 21, the rail clamps 213 lean against the main longitudinal beam 221 on the bottom step surface 2212, to prevent the construction device 22 from suddenly slipping uncertainly due to force on the track 21, causing dangerous construction or pouring position deviation.

Please refer to FIG. 3( a ). FIG. 3( a ) is a schematic structural diagram of a rail clip 212 shown in an embodiment of the present application. As shown in FIG. 3( a ), the rail clamp 212 includes a support plate 2123 and a limiting piece 2121 . The limiting piece 2121 is a bent L-shaped structure and forms an accommodating space 2122 with the supporting plate 2123 . When the track 21 is installed, the support plates 2123 of the two rail clamps 212 are arranged on both sides of the steel bar 211 and the bottom of the track 21 is set in the accommodating space 2122, which is restricted by the stopper 2121 to avoid slipping from the steel bar 211 top.

Please refer to FIG. 3( b ), which is a schematic structural diagram of the rail clamp 213 shown in an embodiment of the present application. As shown in FIG. 3( b ), the rail clamp 213 includes a blocking piece 2131 , a locking bolt 2312 and an installation space 2130 . When restricting the movement of the main longitudinal beam 221 on the track 21, the stop piece 2131 of the rail clamp 213 is against the bottom step surface 2212 of the main longitudinal beam 221, and the installation space 2130 at the bottom accommodates the top of the track 21, and the construction Personnel can twist the locking bolt 2312 to fix the relative position of the rail 21 and the rail clamp 213, and ensure that the rail clamp 213 does not slide, and then ensure that the main longitudinal beam 221 in contact with the rail clamp 213 is not on the rail 21 Movement occurs.

Please refer to FIG. 3( c ), which is a schematic structural view of the main longitudinal beam 221 shown in an embodiment of the present application. 1 to 3 (c), the main longitudinal beam 221 includes the beam body 2210 and the wheel boxes 2211 at both ends, and the wheel boxes 2211 at both ends are provided with wheel hubs that can roll on the track 21. The traveling wheel box 2211 is provided with a motor 2213 that drives the mobile hub 2214 to move. The traveling wheel boxes 2211 at both ends and the beam body 2210 form a "π"-shaped structure.

The installation and construction process of the cover pouring equipment 1 and the corresponding cover pouring process mainly include the following steps:

S01: The construction personnel prepare the drawings, corresponding materials and corresponding construction tools required for the construction process, so as to make preparations for the installation of the cover pouring equipment 1 .

S02: Start measuring and setting out the line and excavating the foundation pit after preparation.

S03: After the foundation pit is dug and the platform body 31 or walls on both sides of the foundation pit are obtained, the construction personnel construct on the platform body 31 and set the reserved holes 311, so as to fill the reserved holes 311 before preparing to install the track 21 The required steel rods 211 are placed to support the track 21 .

S04: Install the track 21.

S05: After the construction personnel installed the track 21, conduct a running test on the track 21 and adjust the track 21 to ensure that the tracks 21 on the platform bodies 31 on both sides are parallel and have the same gauge;

S06: After the track 21 is adjusted, the construction workers adjust the elevation of the formwork, and install the main longitudinal beam 221, the distribution beam 224 and the pouring formwork 225.

S07: After the cover pouring equipment 1 is installed, the construction workers lift the pouring formwork 225 to between the platform caps 32 through the lifting device 23, install steel bars on the pouring formwork 225, support the formwork in blocks, and pour the cover slab 33.

S08: Carry out maintenance on the poured cover plate 33 .

S09: The construction workers adjust the lifting device 23 to retract the lifting device 23 and remove the pouring formwork 225 .

S10: Carry out the pouring construction process of the cover plate 33 of the next section of the abutment 31 (according to the construction situation on site, any step in S03 to S05 can be selected to be re-executed to continue the next section of the abutment in the depth direction of the culvert or bridge 31 carry out cover plate 33 pouring).

For specific details in the above steps, please refer to the following content and corresponding drawings.

Please refer to FIG. 4 . FIG. 4 is a schematic diagram of a cross-sectional view of a culvert in the steps of machining a reserved hole 311 and placing a steel rod 211 in the platform body 31 shown in an embodiment of the present application. As shown in Fig. 4, after the foundation construction of the wall body or the platform body 31 is completed, the construction personnel release the control line of the wall body or the platform body 31 according to the design drawings. During construction, the construction personnel set up a reserved hole 311 at a position 116cm away from the top surface of the platform body 31 and 50cm away from the sides of the platform body 31 (please refer to Figure 5(b), or it can be set to other position size values). The hole 311 adopts Φ630mmpvc or other dimensions, and the embedded depth is 30cm.

After the reserved hole 311 has been processed, the construction personnel manually install the piercing rod (that is, the steel rod 211) before installing the track 21. The piercing rod is made of steel with a diameter of 50mm and a length of 60cm, and a single weight is 7.7Kg. In one embodiment, two steel rods 211 are installed on each side of each platform body 31 , and the two sides are symmetrically installed, and a total of four steel rods 211 are installed. If the depth of each platform body 31 or wall body exceeds 8m, more than two sets of cover casting platforms 2 can be installed on the wall or platform body 31, and cover casting equipment 1 can be composed of multiple sets of cover casting platforms 2 , to speed up the progress of the cover plate 33 pouring.

Please refer to Fig. 5 (a), Fig. 5 (b), Fig. 5 (a) is a schematic diagram of the culvert cross section of the track 21 installation step shown in one embodiment of the application; Schematic diagram of the longitudinal section of the culvert for the installation steps of the track 21. As shown in Figure 5(a) and Figure 5(b), in one embodiment, the track 21 adopts an I-shaped track 21, and the cross-sectional size of the track 21 can be 70mm in width at the top, 150mm in width at the bottom, and 200mm in height. 20mm steel plate welding. The length of a single track 21 is 8m, and the weight of each track 21 is about 478Kg. When the track 21 is installed, it is manually installed with a crane. Every cover plate pouring platform 2 is equipped with 4 sections of tracks 21. The track 21 can be installed in sections according to the construction progress, or two sections can be selected to be installed at the same time. The track 21 is installed and laid on the steel rod 211 of the side wall of the platform body 31 . In order to prevent the track 21 from accidentally moving or falling off, a rail clamp 212 is used for positioning between the track 21 and the steel rod 211, and two rail clamps 212 are installed on both sides of each steel rod 211. After the installation of the track 21 is completed, construction personnel need to check whether the gauge of the track 21 is consistent, so as to further ensure the normal function of the track 21 .

Please refer to Fig. 6 (a), Fig. 6 (b), Fig. 6 (a) is a schematic cross-sectional view of the culvert of the construction device 22 assembling steps shown in one embodiment of the application; Fig. 6 (b) shows an embodiment of the application The schematic diagram of the longitudinal section of the culvert of the construction device 22 assembly steps. Please refer to Fig. 1 to Fig. 6(b), in one embodiment, after the track 21 is installed, the construction personnel install the main longitudinal beam 221, and the two ends of the main longitudinal beam 221 are walking wheel boxes 2211, and the two ends are walking The wheel box 2211 is equipped with a moving wheel hub 2214, and one end is a driving wheel and the other end is a driven wheel. The main longitudinal beam 221 adopts the mode of remote control motor 2213 to start and stop to further control the stopping and walking of the driving wheel and the driven wheel. The motor 2213 adopts a slow motor 2213, and the walking speed is 3 meters per minute. The length of each main longitudinal beam 221 is 8m. The shape is approximately "Π" type. The main longitudinal beam 221 is welded by steel plates with a thickness of 20 mm and installed manually with a crane.

After the installation of the main longitudinal beams 221 next to the platform body 31 on both sides is completed, the main longitudinal beams 221 are connected, reinforced and positioned by four horizontal screw rods 222. After the adjustment of the horizontal screw rods 222 is completed, the scissor braces 223 are installed to increase the main longitudinal beams. The lateral stability of 221 and the rigidity of main longitudinal beam 221.

In an embodiment of the present application, each cover pouring platform 2 is provided with a scissor brace 223 . After the installation is completed, the construction personnel control the main longitudinal beam 221 to conduct a longitudinal test and adjust the rails 21 on both sides according to the running conditions to ensure that the construction device 22 runs smoothly during the subsequent use of the cover pouring platform 2 .

Please refer to Fig. 7(a), Fig. 7(b), Fig. 7(a) is a schematic diagram of the cross-section of the culvert during the preload test shown in one embodiment of the application; Schematic diagram of the culvert profile during the preload test.

Please refer to Fig. 1 to Fig. 7(b), after the screw rod 222 and the scissor brace 223 are installed, the construction personnel lay the I-shaped steel distribution beam 224 on the top surface of the main longitudinal beam 221, and the distance between the distribution beam 224 is according to Different spacings are used for different spans, and the spacing is 45cm to 70cm. The specific spacing is subject to actual load calculation, and then the pouring formwork 225 is laid on the top surface of the distribution beam 224 . Construction workers also install a lifting mechanism 231 (such as a jack) on the track 21 below the beam body 2210 of the main longitudinal beam 221 , and the lifting mechanism 231 is arranged above the steel bar 211 . After the installation is completed, the elevation of the construction device 22 is adjusted by the lifting mechanism 231, and moves horizontally below the entire cover plate 33 pouring range through the track 21 and the traveling wheel box 2211, so as to realize the segment-by-stage mobile construction without support.

In one embodiment, a lifting mechanism 231 is placed at the position corresponding to the steel bar 211 on the track 21. The lifting mechanism 231 can use a 16-ton mechanical jack with a stroke of 200mm. Each set of cover plate pouring platform 2 is equipped with 4 jacks. The jacking height is about 180mm. The jack is extended, and the construction device 22 of the cover plate pouring platform 2 is also lifted by the jack. When the pouring formwork 225 is lifted to the formwork control line, the construction personnel control the jack to stop extending, and move the handle to lock the jack.

After the cover pouring platform 2 is installed for the first time and the pouring formwork 225 is laid, the construction personnel need to perform a preload test on the cover pouring platform 2 to check the strength, rigidity and stability of the cover pouring platform 2 . Before the pre-compression test, construction workers need to lay color strips on the pouring formwork 225 to prevent the pouring formwork 225 from being damaged.

The preload test uses multiple preload blocks 34 to simulate the preload, and the total load is designed to be 120% of the design load of the pouring formwork 225 . The preloading is carried out in three stages, which are respectively 60%, 100%, and 120% of the total preloading load. The construction personnel pre-arranged 9 observation points for settlement observation. If the difference is greater than 2mm and the difference between the observation results after 2 days of loading at the third stage is not greater than 3mm, the settlement can be considered to be in a stable state only if the above conditions are met. The unloading of the pre-compression block 34 also adopts graded unloading, and records the rebound amount of the pouring formwork 225 after each graded unloading. Leave a certain amount of pre-camber.

After the cover pouring equipment 1 has been erected and the cover pouring equipment 1 has passed the preload test, the construction personnel adjust the telescopic length of the lifting device 23 to lift the construction device 22 to the top of the platform body 31 and start construction. A cover plate 33 for connecting the two platform bodies 31 is poured on the top surface of the device 22 .

Please refer to Fig. 8(a), Fig. 8(b), Fig. 8(a) is a schematic diagram of the longitudinal section of the culvert during the initial pouring of the cover plate shown in an embodiment of the application; Fig. 8(b) is an implementation of the application The schematic diagram of the longitudinal section of the culvert when the cover slab is poured in blocks is shown as an example.

As shown in Fig. 1 to Fig. 8(b), the construction workers first bind the steel bars in blocks on the pouring formwork 225 to complete the installation of the side forms, and then pour the cover plates 33 or beam slabs one by one for each side form. Taking Fig. 8(a) and Fig. 8(b) as an example, the cover plate 33 is poured in six pieces, and the construction personnel first install the side formwork and concrete pouring for the first three pieces of the interval; when the first three pieces of the cover plate 33 When the strength meets the requirements, the first three sections of side forms are removed, and the steel bars of the last three sections of side forms are installed at intervals, and concrete is poured. Please refer to FIG. 6( a ), the cover board spans between the two sides of the platform body 31 , and the corresponding length is L.

When the concrete of each section of the cover plate 33 is poured and reaches the final setting time, the construction personnel will carry out watering and moisturizing maintenance on the covered geotextile. The concrete strength can only be demolished after reaching the design or specification requirements.

Please refer to FIG. 9 . FIG. 9 is a schematic diagram of a longitudinal section of a culvert during the demoulding step of the cover plate 33 shown in an embodiment of the present application. As shown in Figure 9, when the construction personnel complete the pouring of the cover plate 33 and remove the pouring formwork 225, they must operate the lifting mechanism 231 to descend, and the construction device 22 will descend together with the lifting mechanism 231 under the action of gravity, and it should be slow and stable when descending. After the construction device 22 is lowered, the distribution beam 224 and the pouring formwork 225 will fall off naturally, and the distribution beam 224 and the pouring formwork 225 that have not fallen off are manually removed.

After the lifting device 23 retracts a certain distance, the traveling wheel box 2211 of the main longitudinal beam 221 will fall on the track 21 . At this time, the construction workers take out the lifting mechanism 231 and limit the position with the rail clamp 212 to prevent the main longitudinal beam 221 from moving.

Please refer to FIG. 10 , which is a schematic cross-sectional view of the culvert when the construction device 22 moves to the next pouring position 330 according to an embodiment of the present application. As shown in Figure 10, when the front cover plate 33 is poured and the construction device 22 needs to move to the platform body 31 of the next section to prepare the cover plate 33 pouring again, the construction device 22 first falls to the track 21, and the construction personnel will move to the next section. Prepare reserved holes 311, install steel rods 211 and tracks 21 on the body of the wall and the table top. Then the construction workers adjust and fix the track 21, and after checking that it meets the requirements, release the rail clamp 213, operate the controller to make the main longitudinal beam 221 walk on the track 21, and control the construction device 22 to move to the bottom of the next pouring position 330. After the construction device 22 moves to the bottom of the next pouring position 330, the construction personnel lock the main longitudinal beam 221 again through the rail clamp 213, and check and adjust the platform. Then control the elongation of the lifting mechanism 231 again to lift the pouring formwork 225 to the formwork support level, carry out formwork installation and steel bar installation, and carry out the cast-in-place construction of the next section cover plate 33. The construction personnel complete the pouring of the cover plate on the top of the platform body 31 of each segment sequentially in a cycle until the pouring of the cover plate 33 of the entire culvert or bridge is completed.

The cover pouring equipment 1 and the construction method provided by the present application do not need to set up supports when they are applied to the cast-in-place construction of culverts and small bridges, and only need to use the cover pouring platform 2 installed on the platform body 31 to carry out cast-in-place construction . Secondly, for bridges and culverts with poor geological conditions, insufficient working space or passing water, there will be no construction problems such as high treatment costs due to insufficient foundation bearing capacity, or large water flow, too small working space to erect supports, etc. It has strong practicability and high universality. In addition, the cover pouring equipment 1 provided by this application has reliable construction quality during application, high safety in segmented construction, simple operation, and convenient and fast turnover. Only the screw rod 222 needs to be replaced, which reduces the construction cost and has better technical and economic benefits.

In this application, through the cover pouring platform 2 installed on the platform body 31, the movable and lifting construction device 22 realizes the pouring and connection at any position in the depth of the culvert and bridge under complex geological conditions without erecting a large number of supports. The cover plate 33 of the platform body 31 on both sides. This application effectively improves the pouring quality, pouring efficiency and construction safety of the cover plate 33, is applicable to various working environments and working spaces, is convenient to load and unload, and has many advantages such as strong versatility and cost saving.

The above descriptions are only preferred embodiments of the present application, and are not intended to limit the present application. For those skilled in the art, there may be various modifications and changes in the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of this application shall be included within the protection scope of this application.

Claims (12)

1. The utility model provides a apron pouring platform which characterized in that includes:

the at least two rails are respectively arranged on the side walls of the two platform bodies;

the construction device is movably arranged on the track and is positioned between the two platform bodies;

the lifting device is arranged on the track; the construction device is jacked to the top of the platform body by the lifting device so as to pour the cover plate for connecting the two platform bodies.

2. The cover plate pouring platform according to claim 1, wherein a plurality of preformed holes are formed in the side wall of the platform body, one steel bar is arranged in each preformed hole, and one rail is connected with the plurality of steel bars.

3. The deck casting platform as claimed in claim 2, wherein each of said preformed holes is equidistant from a top surface of said deck.

4. The decking pouring platform defined in claim 2 wherein the lifting means includes a plurality of lifting mechanisms, one on top of each of the steel bars.

5. The cover deck pouring platform as recited in claim 1, further comprising:

and the rail clamps are arranged on the rail, and when the construction device falls on the rail, the rail clamps are abutted against the bottom step surface of the construction device.

6. The deck casting platform as claimed in claim 1, wherein said construction means comprises:

the two main longitudinal beams are arranged on the track beside the platform body, and the two ends of each main longitudinal beam are provided with a traveling wheel box.

7. The deck casting platform as claimed in claim 6, wherein said construction means further comprises:

and two ends of the screw rod are respectively connected with the two main longitudinal beams.

8. The deck casting platform as claimed in claim 6, wherein said construction means further comprises:

the cross brace is provided with four support ends, and the two support ends are connected with the main longitudinal beam.

9. The deck casting platform as claimed in claim 6, wherein said construction means further comprises:

the two ends of each distribution beam are respectively erected on the top surfaces of the two main longitudinal beams;

and the pouring templates cover the top surfaces of the distribution beams.

10. The deck casting platform as claimed in claim 1, wherein said deck casting platform comprises:

and the working guardrail is arranged on the top surface of the construction device and stretches across the two platform bodies.

11. Cover casting installation, characterized in that it comprises at least one cover casting platform according to any of claims 1 to 10.

12. The construction method of the cover plate pouring equipment is characterized by comprising the following steps:

after the cover plate pouring equipment according to claim 11 is erected, adjusting the telescopic length of the lifting device to lift the construction device to the top of the platform body;

pouring a cover plate for connecting the two platform bodies on the top surface of the construction device;

and after the construction device falls to the track, controlling the construction device to move to the position below the next pouring position.

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