CN205348008U - Basket is hung in construction of wave form rigid web - Google Patents

Abstract

The utility model discloses a corrugated steel web construction hanging basket. The construction hanging basket includes an upper beam component, a lower beam component, and a plurality of suspension rods connecting the upper beam component and the lower beam component; a bottom plate bottom template and a bottom plate side template are arranged on the lower beam component, and the upper beam component is supported on the top surfaces of two corrugated steel webs by two groups of support beams, and a jacking device is arranged between the support beam and the top of the corrugated steel web; a top plate bottom template is arranged on the upper beam component; horizontally arranged sliding beams are arranged on both sides of the corrugated steel web, and a conveying device for conveying the bottom plate bottom template, the bottom plate side template and the top plate bottom template to the position to be poured is installed on the sliding beam. The utility model can effectively reduce the dead weight of the hanging basket, improve the safety factor of the hanging basket and accelerate the construction efficiency.

Description

A corrugated rigid web construction hanging basket

technical field

The utility model relates to a construction hanging basket with corrugated rigid webs, in particular to a hanging basket structure and construction technology for the construction of corrugated rigid webs of PC beams, belonging to the technical field of composite beams.

Background technique

With the increasing web cracking problems of continuous box girder bridges, corrugated rigid web bridges have been gradually popularized and applied. It has the advantages of light structure, less web cracking and disease, and high economic performance. However, compared with the construction technology of ordinary hanging baskets, its construction technology is separated from the simultaneous pouring of the bottom plate, web and top plate into three working conditions of installing the web, pouring the bottom plate and pouring the top plate. If the construction is carried out according to the conventional hanging basket technology, the construction speed will be significantly reduced.

Utility model content

In order to solve the problem that the existing hanging basket cannot satisfy the simultaneous construction of the three working faces of the bridge with corrugated rigid web, the utility model aims to provide a construction hanging basket with corrugated rigid web, which can effectively reduce the weight of the hanging basket , Improve the safety factor of the hanging basket and speed up the construction efficiency.

In order to achieve the above object, the technical solution adopted in the utility model is:

A construction hanging basket with corrugated rigid web, its structural feature is that it comprises an upper beam, a lower beam, and multiple sets of suspenders connecting the upper beam and the lower beam; the lower beam is provided with a bottom plate The formwork and the bottom plate side formwork, the upper beam is supported on the top surface of the two corrugated rigid webs by two sets of support beams, and there is a supporting beam for driving between the support beams and the top of the corrugated rigid webs and the upper beam to form a thrusting device that slides relative to the corrugated rigid web; the upper beam is composed of a roof and a bottom formwork, and both sides of the corrugated rigid web are provided with horizontally arranged sliding beams. The top is equipped with a conveying device for transporting the bottom formwork of the bottom plate, the side formwork of the bottom plate and the bottom formwork of the top plate to the position to be poured.

During the construction process, the pouring area of the bottom slab concrete is enclosed between the bottom formwork of the bottom slab and the side formwork of the bottom slab, the pouring area of the top slab concrete is formed on the bottom slab bottom formwork, and the bottom end of the corrugated rigid web is arranged in the pouring area of the bottom slab concrete Inside.

According to the embodiments of the present invention, the present invention can also be further optimized, and the following is the technical scheme formed after optimization:

The top of the corrugated rigid web is provided with a groove along the length direction, and a plurality of through holes are opened on the side wall of the groove, and the bottom end of the support beam is passed through the fastener or through the corresponding through hole. The pin shaft is detachably fixed on the corrugated rigid web.

A PTFE sliding plate is arranged between the bottom of the groove and the bottom end of the support beam. Thus, the fulcrum and the corrugated rigid web top plate chute are padded with PTFE slides. More preferably, when the hanging basket is walking, grease is applied between the walking boat and the surface of the track to reduce friction and facilitate hanging basket walking.

The two corrugated rigid webs are connected through support rod cross braces.

The conveying device is a transport trolley, and the sliding beam is hung on the poured roof through a liftable suspender.

The bottom side wall of each corrugated rigid web has convex structures extending to both sides.

The pushing device is a hydraulic rod, and the installation angle of the hydraulic rod is 5°-15° relative to the horizontal plane.

The boom includes a jack, and the jack is a double-nut structure, wherein the upper nut is used for jacking up, and the lower nut is used for load bearing. Therefore, double nuts are designed where the hanging basket uses a jack, the upper nut is used for lifting, and the lower nut is used for load bearing. After jacking up, the lower nut must be tightened. The walking method is that one end is hinged and anchored on the rear fulcrum of the hanging basket, and the oil is supplied by the electric oil pump. After reaching the stroke, the other end is hinged and anchored to the corrugated steel web with a steel pin φ60 through the hole. On the hole, the electric oil pump returns the oil, and the fulcrum slides to drive the whole hanging basket forward after being pulled by the hydraulic rod. After reaching a stroke, the steel pin in the through hole is removed, and the hydraulic station supplies oil. After reaching the stroke, the steel pin is used to anchor the through hole again On, push the hydraulic rod again to start the next stroke, and so on and forth several times until finally in place.

With the above structure, the hanging lifting system consists of different types of jacks and two types of booms: 40cr and precision-rolled rebar. The walking system is composed of hydraulic rods, upper flange grooves, sliding beams and sliding beams. The formwork system includes top plate formwork, bottom plate formwork, end-sealing formwork and working platform, etc. All formwork designs are considered according to the one-time pouring of box girder concrete for the full section.

As a preference, the hanging basket uses the corrugated steel web as the main longitudinal beam, and the structural system changes from the cantilever system of the conventional hanging basket to a simply supported system, canceling the longitudinal beam and the rear anchor system, and the fulcrum is on the corrugated steel web. Sliding in the groove eliminates the track, thereby effectively reducing the weight of the hanging basket and the reserved eyeholes of the beam body, and ensuring the safety of the hanging basket when it moves forward.

As an optimization, the lower edge of the corrugated steel web is embedded with the concrete floor, and the lower edge is unfavorable for force. A steel plate is added to the lower edge of the corrugated steel web. The steel plate and the corrugated steel web are connected by double-sided foot welding. At the same time, temporary support cross braces are set between the left and right corrugated steel webs to ensure the longitudinal and transverse rigidity of the corrugated steel webs.

As a preference, two types of lateral supports are provided on both sides of the formwork. The rod-type support ensures the installation accuracy of the formwork, and the truss-type support improves the torsion resistance of the cantilever opening.

As a preference, all finish-rolled rebars used for anchoring should be pre-tensioned before they can be used. During construction, protective measures should be taken to prevent electric sparks from touching, bending, and collisions. All anchor rods and finish-rolled rebar must expose more than three wires of the nut. Where connecting sleeves are used, they must be marked with red paint to ensure that the anchorage lengths are equal.

Preferably, the I-beam is fixedly installed on the sliding beam, and the top formwork is installed on the I-beam, which increases the construction work section.

As a preference, it is necessary to pay attention to symmetrical unloading when the hanging basket system is converted, and to load step by step until the lock nut can be turned to loosen the suspender, so as to avoid partial load or excessive additional load.

When working, the fixed fulcrum of the hanging basket is placed on the assembled corrugated rigid web, and the pin shaft is hinged and anchored on the perforated steel plate through hole of the corrugated steel web as the jacking force, and is set in the corrugated rigid web chute. PTFE skateboard. Set the sliding beam between the rear anchor point and the middle anchor point, and erect the support and formwork on the sliding beam. Two types of temporary support members are set between the rigid webs.

Compared with the prior art, the beneficial effect of the utility model is that the hanging basket construction device of the utility model erects the hanging basket directly on the corrugated rigid web, and deletes the diamond-shaped or triangular cantilever components compared with the traditional hanging basket construction device , which reduces the total mass of the hanging basket and improves the anti-overturning safety factor of the hanging basket. At the same time, the new hanging basket structure can make the structure have a larger working space. The cantilever construction working face is divided into m block working face (pouring roof), m+1 block working face (pouring bottom plate), and m+2 block working face (hanging basket). Make the construction speed increased by more than 35%.

Below in conjunction with accompanying drawing and embodiment the utility model is described further.

Description of drawings

Fig. 1 is the structural elevation view of the corrugated rigid web hanging basket of the utility model;

Fig. 2 is the structural principle diagram of the present utility model;

Fig. 3 is the right view of Fig. 2;

Figure 4 is a diagram of the corrugated rigid web jacking equipment;

Fig. 5 is the schematic diagram of sliding beam structure;

Fig. 6 is a structural schematic diagram of a corrugated rigid web;

Fig. 7 is a construction flowchart of an embodiment of the utility model.

In the picture

1-upper beam; 2-front pivot boom; 3-corrugated rigid web; 4-sliding beam; 5-rear pivot boom; 6-middle pivot boom; 7-construction platform guardrail; 8-lower longitudinal beam; 9-type A horizontal support rod; 10-type B support rod; 11-roof concrete; 12-hydraulic rod; 13-groove; Beam; 18-lower beam; 19-through hole; 20 roof bottom formwork; 21-bottom plate bottom formwork; 22-bottom plate side formwork; 23-bottom slab concrete; 24-construction platform;

detailed description

A corrugated rigid web hanging type construction hanging basket, as shown in Figures 1 and 2, is mainly composed of a load-bearing system, a hanging lifting system, a walking system, and a formwork system, wherein the load-bearing system includes an upper beam 1 and a lower longitudinal beam 8 And corrugated just web 3; The walking system includes a hydraulic rod 12, a groove 13 arranged on the top of the corrugated rigid web 3, a PTFE slide plate 14, a sliding beam 4 and a walking trolley 15; the formwork system includes a top formwork, a bottom formwork, a sealing formwork and a working platform.

The support beam is embedded in the groove 13 of the corrugated rigid web, the threaded steel bar traverses the through hole and the support beam hole, and the bolts are anchored. The supporting beam 16 is fixed in the groove 13 . Thus, the supporting point of the hanging basket is anchored in the chute of the corrugated rigid web, and the opening of the upper plate of the corrugated rigid web and the fulcrum of the hanging basket are connected with bolts. A teflon slide plate 14 is laid between the support beam 16 and the groove 13, and grease is applied in the groove 13. The teflon slide plate in the corrugated rigid web chute 13 is larger than the width of the fulcrum by 10cm, and the upturn angle of the edge of the slide plate is 45°.

The upper longitudinal beams 17 and 25 are welded to the top of the support beam 16 . On the supporting beam 16, the upper crossbeam 1 is set up, and on the upper crossbeam 1, the middle fulcrum suspender 6 upper edge is anchored with bolts. Middle fulcrum suspender rod 6 lower edges are anchored lower beam 18 with bolt.

The rear upper beam is made of 2I45b I-shaped steel to form a steel box, the front upper beam is made of 2I40b I-shaped steel to form a steel box, and the two upper beams are connected by two 2I25b I-shaped steel longitudinal beams to form a hanging basket load-bearing platform. Each suspender adopts two types of 40Cr suspender and φ32 fine-rolled rebar suspender. In order to increase the connectivity of the hanging basket, the 40Cr suspender has two specifications of 3.5m and 1.75m, and all of them are connected by connectors. Jacks of different specifications are prepared at each lifting point as the lifting power according to the force, so that the elevation of the formwork can be adjusted quickly in time, the production efficiency can be improved, and the construction period can be shortened.

The sliding beam 4 is erected on both sides of the corrugated rigid web 3 in parallel, and the sliding beam 4 is fixed by the rear fulcrum suspender 5 and the middle fulcrum suspender 6 . The sliding beam is fixed by the rear fulcrum and the middle fulcrum, and the slope of the sliding beam should be consistent with the longitudinal slope at the top of the box girder. Set up horizontal I-beams at equal intervals on the sliding beam, and set up rigid models on the I-beams.

Three consecutive adjacent construction blocks are provided with lateral temporary supports, the upper and lower edge temporary supports are I-shaped steel, and the middle is I-shaped steel.

The bottom plate side formwork 22 is used to control the concrete pouring thickness of the bottom plate, and the construction platform 24 is used for the construction of each stage.

The method of constructing the box girder using the corrugated steel web construction hanging basket includes the following steps: 1) The assembly sequence of the hanging basket is: install the temporary support between the corrugated steel webs → lay the PTFE slide track → install the front and rear fulcrums of the hanging basket (Temporary stabilization) → connecting longitudinal beams → front and rear upper beams → booms → front and rear lower beams → bottom longitudinal beams → formwork.

2) Loose hanging basket formwork: After the concrete on the top slab of the box girder in the previous section reaches its strength, loosen the top slab formwork first, install the sliding trolley, and use a jack to slowly and synchronously remove the rear hanger of the sliding beam to transmit the force of the hanger to the sliding On the trolley, lower the front anchor point of the sliding beam at the same time, slowly peel off the formwork from the roof concrete, and complete the removal of the inner and outer formwork of the roof. The jack synchronously and slowly lowers the front and rear lower beams sequentially, and the formwork is stripped of the bottom slab concrete, that is, the disassembly of the bottom platform and the preparation for walking of the hanging basket are completed.

3) The hanging basket moves forward: the hydraulic rod installed at the rear fulcrum is anchored to the perforated steel plate of the corrugated steel web through the steel pin, and the two hydraulic rods are used to synchronously and slowly pull the hanging basket forward.

During construction, the corrugated steel web 3 is installed on the temporary support of block m+1, and the installation accuracy of the corrugated steel web is controlled by the A-type support 9 and the B-type support 10. One end of the hydraulic rod 12 is bolted to the through hole 19 on the side wall of the groove 13 of the corrugated rigid web 3 , and the other end of the hydraulic rod 12 is inserted into the notch of the support beam 16 . During construction, the electric oil pump returns oil, and the hydraulic rod 12 pulls the rear fulcrum boom 5 to slide to drive the whole hanging basket forward. After reaching a stroke, the steel pin in the through hole 19 is removed, and the hydraulic station supplies oil. The pin anchors the support beam 16 on the through hole 19 again, restarts the hydraulic rod 12, and starts the next stroke action, so reciprocates several times until the hanging basket is pushed forward to the m+1 block section.

During the construction process, the transport trolley 15 transports the roof and bottom formwork 20 to the position to be poured. A welded transverse I-beam is arranged on the sliding beam 4 of the length to be poured, and a roof and bottom formwork 20 is erected on the I-beam. The inclination angle of the sliding beam 4 is adjusted through the rear fulcrum suspender 5 and the middle fulcrum suspender 6, so that the control point at the front end of the roof and bottom template 20 reaches the elevation of the formwork. When pouring the top slab concrete of the m block section, adjust the rear fulcrum suspender 5 and the front fulcrum suspender 2 at the same time, so that the base plate bottom template 21 is adjusted to the control elevation. Pour m+1 section bottom slab concrete, then set up temporary support in m+2 section, and install corrugated rigid web 3 on the support.

The concrete pouring of the top slab of the m block, the concrete pouring of the bottom slab of the m+1 block, and the installation and construction of the corrugated rigid web of the m+2 block are carried out synchronously. After completion, enter the next cycle construction step.

In a word, the hanging basket structure of the utility model is directly erected on the chute of the corrugated rigid web, and the corrugated rigid web bears the temporary load of the hanging basket, formwork system and construction, without setting cantilever I-beam and walking channel steel, which reduces the hanging load. The self-weight of the basket structure increases the safety factor against overturning. A PTFE slide plate is installed in the chute of the corrugated rigid web to reduce the sliding friction of the hanging basket and speed up the walking efficiency. The hanging basket structure realizes the function of expanding the working surface, and divides the cantilever construction working surface into m block working face (casting roof), m+1 block working face (pouring bottom plate), m+2 block working face (cantilever spell hanging basket). Make the construction speed increased by more than 35%.

The above-mentioned embodiments should be understood that these embodiments are only used to illustrate the utility model more clearly, and are not intended to limit the scope of the utility model. After reading the utility model, those skilled in the art will understand each aspect of the utility model Modifications in various equivalent forms all fall within the scope defined by the appended claims of this application.

Claims (8)

1. A corrugated rigid web construction hanging basket is characterized in that it comprises an upper beam composition, a lower beam composition, and a plurality of groups of suspender rods connecting the upper beam composition and the lower beam composition; the lower beam composition is provided with a base plate The bottom formwork (21) and the bottom plate side formwork (22), the upper beam is supported on the top surface of the two corrugated rigid webs by two sets of support beams (16), and the support beams (16) and corrugated The top of the rigid web (3) is provided with a pushing device for driving the support beam (16) and the upper beam composition to slide relative to the corrugated rigid web; the upper beam composition is provided with a top plate bottom formwork (20 ), both sides of the corrugated rigid web are provided with sliding beams (4) arranged horizontally, and the sliding beams (4) are equipped with bottom formwork (21), side formwork (22) and bottom formwork for transporting the bottom plate (20) Conveying device to the position to be poured. 2. The construction hanging basket with corrugated rigid web according to claim 1, characterized in that, the top of the corrugated rigid web (3) is provided with a groove (13) arranged along the length direction, and in the groove (13 ) has a plurality of through holes (19) on the side wall, and the bottom end of the support beam (16) is detachably fixed to the corrugated rigid web through fasteners or pins passing through the corresponding through holes (19) (3) on. 3. The construction hanging basket with corrugated rigid web according to claim 2, characterized in that a PTFE slide (14) is provided between the bottom of the groove (13) and the bottom of the support beam (16). 4 . The construction hanging basket with corrugated rigid webs according to claim 1 , characterized in that, the two corrugated rigid webs ( 3 ) are connected by cross braces of support rods. 5. The corrugated rigid web construction hanging basket according to claim 1, characterized in that, the conveying device is a transport trolley (15), and the sliding beam (4) is hung on the poured and formed on the top plate. 6. The construction hanging basket with corrugated rigid web according to claim 1, characterized in that, the bottom side wall of each corrugated rigid web (3) has a raised structure extending to both sides. 7. The construction hanging basket with corrugated rigid web according to claim 1, characterized in that the pushing device is a hydraulic rod (12), and the installation angle of the hydraulic rod (12) is 5°-15° relative to the horizontal plane . 8. The corrugated rigid web construction hanging basket according to claim 1, wherein the suspension rod includes a jack, and the jack is a double-nut structure, wherein the upper nut is used for jacking up, and the lower nut is used for bearing .