CN216687245U - Steel truss hanging device for pouring large-span tie beam of high pile cap - Google Patents

Abstract

The utility model relates to the technical field of bridge construction, and discloses a steel truss hanging device for pouring a large-span tie beam of a high pile cap, which comprises: the tie beam template is used for pouring tie beams; the two ends of the steel truss girder are respectively erected on two pier columns to be constructed; the tensioning jack is arranged at the top of the steel truss girder; the hanging steel strand is connected to the output end of each tensioning jack; and the anchoring device is used for connecting the tie beam template and the hanging steel strand. The utility model has the following advantages and effects: because this application erects on the pier stud, and hoist for top-down, need not to set up from bottom to top and support stake and complicated supporting mechanism, can reduce on-the-spot welding construction, also reduced just use amount, reduced artifical and material cost, reduce the work progress of on-the-spot pile simultaneously, improve the efficiency of construction. And this application can be under multiple bad construction environment such as high stake, geology is bad, construction on water, convenient, efficient construction tie beam.

Description

Steel truss hanging device for pouring large-span tie beam of high pile cap

Technical Field

The application relates to the technical field of bridge construction, in particular to a steel truss hanging device for pouring of a large-span tie beam of a high pile cap.

Background

The tie beam is positioned on the pier column and is a structure for improving the stress of the pier column and the integral rigidity. The traditional high-pile bearing platform large-span pouring construction method comprises the following steps: and (3) driving auxiliary support piles into the bottoms or the side surfaces of the tie beams, arranging hanging beams on the support piles, and then connecting the hanging beams with cofferdams and templates for pouring the tie beams into a whole. The structure utilizes to hang the roof beam and bears cofferdam, template dead weight and pour the load, hangs on the roof beam transmits the load to supporting pile, and then transmits the load to the ground in. The traditional method has the advantages that: the construction method is mature, the force transmission path is clear, and the temporary structure design is simple.

The disadvantages are that:

1. the connection among all components is more, and the field welding quantity is large. The welding between the hanging beam and the supporting pile, the welding of the cofferdam anti-sinking and anti-floating device and the auxiliary supporting pile need to have enough strength, and the on-site welding quality is not easy to be ensured.

2. When the large-span tie beam is constructed, the pile driving quantity on site is large, and the driven pile is required to have higher precision so as to be convenient for the installation of a subsequent structure. The construction difficulty is high, the construction process is complex, the number of construction machines is large, and the construction efficiency on site is reduced.

3. The auxiliary supporting pile is generally low in rigidity, particularly in the case of high-pile bearing platform construction, casting load actually shared by a single pile is low due to large deformation, and a complex underwater connecting system needs to be arranged when necessary in order to increase the overall stability of a driven pile.

4. The bearing capacity provided by the auxiliary supporting pile is limited, and when the geological conditions are poor, the supporting pile cannot effectively provide uplift resistance, so that the penetration depth has to be increased, and the construction difficulty and the using amount of a temporary structure are increased.

SUMMERY OF THE UTILITY MODEL

To the defect that exists among the prior art, the aim at of this application provides a steel truss cable suspension device for high pile cap large-span tie beam is pour, and the connection support part is few, and on-the-spot welding work is few, and required construction machinery is few, has avoided complicated underwater connection to be and auxiliary stay structure simultaneously, has improved the efficiency of construction.

In order to achieve the above purposes, on one hand, the technical scheme is as follows:

the application provides a steel truss cable suspension device that is used for high pile cap large-span tie beam to pour, include:

the tie beam template is used for pouring tie beams;

the two ends of the steel truss girder are respectively erected on two pier columns to be constructed;

the at least two tensioning jacks are arranged at the top of the steel truss girder, and the output ends of the tensioning jacks are vertically downward;

at least two hanging steel strands, wherein each hanging steel strand is connected to the output end of each tensioning jack;

and the anchoring device is used for connecting the tie beam template and the hanging steel strand and is arranged at one end of the hanging steel strand, which is far away from the tensioning jack.

Preferably, the method further comprises the following steps:

and part of the embedded part is embedded in the pier stud, and the steel truss girder is arranged on the pier stud through the embedded part.

Preferably, the embedded part is installed on the center line of the pier stud.

Preferably, the steel girder further includes:

and the bearing columns are arranged between the embedded parts and the corresponding ends of the steel trussed beams.

Preferably, the tie beam formwork comprises:

the side molds are provided with a pair of side molds, and two ends of each side mold are respectively abutted against the two pier studs to be constructed;

the two ends of the bottom die are respectively abutted against the two pier columns to be constructed;

the side surfaces of the bottom die, the two pier studs and the pair of side dies jointly enclose a space for forming a pouring tie beam.

Preferably, the tie beam formwork further comprises:

the end part anchoring mechanism is vertically arranged on the edge of the end face of the pier stud, and the bottom end of the end part anchoring mechanism is arranged on the bottom die.

Preferably, the end anchoring mechanism comprises:

the water stop baffle is arranged at the edge of the pier stud;

and one end of the connecting stranded wire is connected with the water stop baffle, and the other end of the connecting stranded wire is connected with the bottom die.

Preferably, the tie beam formwork further comprises:

and the side surface of the internal mold is connected with the side mold through a steel strand.

Preferably, the steel girder further includes:

and a plurality of operating platforms are arranged, each operating platform is arranged on the top of the steel truss along the bridge direction, and each tensioning jack part extends out of one operating platform.

Preferably, each of the tensioning jacks is located at an upper chord node of the steel truss.

The beneficial effect that technical scheme that this application provided brought includes:

the application discloses a steel truss cable suspension device for high pile cap large-span tie beam is pour, because this application erects on the pier stud, and it hoists to be top-down, need not to set up support pile and complicated supporting mechanism from bottom to top, can reduce the on-the-spot welding construction, has also reduced just use amount, has reduced manual work and material cost, reduces the work progress of on-the-spot pile simultaneously, improves the efficiency of construction. And this application only needs the pier stud to support, can be under multiple bad construction environment such as high stake, geology is bad, construction on water, convenient, efficient construction tie beam. And this application only need hoist the steel longeron and weld again on the pier stud and can use, has reduced the required engineering apparatus of construction, has reduced the construction degree of difficulty.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic front view of an embodiment of the present application.

Fig. 2 is a schematic cross-sectional view taken along line a-a in fig. 1.

Fig. 3 is a schematic cross-sectional view taken along line B-B in fig. 1.

Fig. 4 is a schematic top view of fig. 1.

Reference numerals:

1. a steel truss beam; 11. a load-bearing column; 12. an operating platform; 2. tensioning a jack; 3. hanging steel strands; 4. an anchoring device; 5. tying a beam template; 51. side mould; 52. bottom die; 53. an inner mold; 54. an end anchoring mechanism; 541. a water stop baffle; 542. connecting stranded wires; 6. embedding parts; 7. and (5) pier studs.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The application provides a steel truss cable suspension device that is used for high pile cap large-span tie beam to pour, include: the system comprises a beam template 5, a steel truss girder 1, a tensioning jack 2, a hanging steel strand 3 and an anchoring device 4.

Specifically, as shown in fig. 1 and 3, in the present embodiment, the tie beam formwork 5 is used for casting the tie beam, and is formed by an external steel structure and an internal plate, the external steel structure is used for determining the shape of the tie beam, and the internal plate is used for connecting and supporting.

The steel girder 1 mainly plays a role of supporting. Specifically, referring to fig. 1 and 2, the steel girder 1 is generally a truss structure for reducing weight, and both ends of the steel girder 1 stand on the pier 7 and are supported by the pier 7.

And at least two tensioning jacks 2 are arranged at the top of the steel truss girder 1, and the output ends of the tensioning jacks 2 are vertically downward. Specifically, the number of the tensioning jacks 2 is at least two, which is used for maintaining the stability of the tie beam formwork 5, the specific number is determined according to the mechanism of the tie beam formwork 5, and the larger the tie beam formwork 5, the larger the number of the tensioning jacks 2 is required, so as to facilitate the accurate adjustment of the tie beam formwork 5.

And the hanging steel strand 3 is connected to the output end of the tensioning jack 2, and the other end of the hanging steel strand 3 is provided with an anchoring device 4. Specifically, referring to fig. 1, the number of the hanging steel strands 3 is the same as the number of the tensioning jacks 2, and in a general embodiment, the tail ends of the hanging steel strands 3 are exactly located at the position of the tie beam formwork 5 to be constructed, the tie beam formwork 5 is lifted to the construction position by a crane during installation and is connected by the anchoring device 4, and the tensioning jacks 2 mainly support and adjust the state of the tie beam formwork 5 within a certain range.

The anchoring device 4 can be seen in fig. 1 and 3, and in this embodiment, is a short beam, and is connected to the tie beam formwork 5 through two strands, and after construction, the strands can be cut to complete separation, and in some embodiments, can also be connected through a connecting member.

Under general conditions, the hanging construction can be realized only by placing the two ends of the steel trussed beam 1 on the pier stud 7, but in some implementation processes with higher requirements on the shape of the tie beam, the steel trussed beam 1 is placed randomly so that the position of the tensioning jack 2 is not accurate enough, the tensioning jack 2 is uncertain to a certain extent when adjusting the position of the tie beam template 5, the tie beam template 5 is difficult to accurately install, and when the crane lifts the steel trussed beam 1, the crane is influenced by the field environment, for example, bad weather such as wind and rain and the like and the working hour requirements during the hoisting of the crane are difficult to measure and align on site.

Therefore, in some preferred embodiments, an embedded part 6 is further provided, which is partially embedded in the pier stud 7, and the steel truss beam 1 is mounted on the pier stud 7 through the embedded part 6. Specifically, referring to fig. 1 and 2, when constructing the pier stud 7, the measurement may be performed on the top of the pier stud 7, the embedded part 6 is installed at the position of the embedded part 6, and when constructing the steel truss 1, the steel truss 1 may be directly aligned with the embedded part 6 for installation, which is very convenient for the accurate alignment of the steel truss 1 during installation.

Meanwhile, in order to conveniently check whether the pier stud 7 can sufficiently support the weight of the whole hanging device in advance, in some preferred embodiments, the embedded part 6 is arranged on the center line of the pier stud 7. The vertical load transmitted by the steel truss is transmitted along the central line of the pier stud 7 by the aid of the embedded part 6, so that the pier stud 7 and a pile structure below the pier stud are in an axis compression state, the whole calculation process is simpler and more convenient, and meanwhile, the stress process is more reasonable.

In some cases, in order to avoid the friction and collision between the steel truss 1 and the top surface of the pier stud 7 to damage the pier stud 7, in some more preferred embodiments, the steel truss 1 further includes a weight bearing column 11 disposed between the embedded part 6 and the corresponding end of the steel truss 1. Specifically, in the general embodiment, four load-bearing columns 11 are respectively arranged at four corners of the steel truss girder 1.

In some preferred embodiments, the tie beam formwork 5 comprises:

the side forms 51 have a pair, and both ends of the side forms are respectively abutted against two pillars 7 to be constructed.

And the two ends of the bottom die 52 are respectively abutted against the two pier studs 7 to be constructed.

The bottom die 52, the side surfaces of the two pillars 7 and the pair of side dies 51 together enclose a space for forming a cast tie beam.

Specifically, as shown in fig. 1 and 3, the side die 51 is formed by connecting the side die 51 and the bottom die 52 by using steel structures as connecting members, and the side of the side die 51 close to the concrete is a plate, so that the weight of the side die 51 can be effectively reduced, and the difficulty in hoisting the tie beam formwork 5 can be reduced.

When the steel girder 1 is compressed, not only downward pressure is applied to the pier stud 7, but also outward pushing force is generated due to deformation of the steel girder 1 itself, and the outward pushing force is disadvantageous to the pier stud 7.

In some preferred embodiments, the tie-beam formwork 5 further includes an end anchoring mechanism 54 vertically disposed on an end edge of the pier stud 7, and a bottom end thereof is mounted to the bottom formwork 52.

Specifically, the end anchoring mechanisms 54 are used for bearing a part of pouring load, the specific bearing amount can be adjusted according to design requirements, the vertical force generated by the end anchoring mechanisms 54 is downward vertically along the edge of the end of the bearing platform, and the moment generated by the end anchoring mechanisms 54 to the center of the bearing platform can be balanced with the moment generated by the horizontal thrust of the steel truss girder 1 to the center of the bearing platform, so that the stress of the whole system is more reasonable. Sometimes, in order to facilitate the hanging of the end anchoring mechanism 54, a short portion of the tie beam is poured near the pier 7 at the location where the tie beam is to be installed.

In some further embodiments, the end anchoring mechanism 54 includes:

and a water stop baffle 541 arranged on the edge of the pier stud 7.

The connecting strand 542 has one end connected to the water stop board 541 and the other end connected to the bottom die 52.

Specifically, as shown in fig. 2, the end anchoring mechanism 54 includes a water-stop baffle 541 disposed above, the water-stop baffle 541 is mainly used for preventing water at the top of the pier stud 7 from leaking into the tie beam template 5, and at the same time, the water-stop baffle 541 can be used as a structure for temporarily fixing the tie beam template 5 when the installation process is not connected to the steel truss girder 1, and at the same time, in the hoisting process, the tension force of the connecting stranded wire 542 can be controlled, so as to control the load transmitted to the edge of the pier stud 7, so that the moment at the edge of the pier stud 7 and the moment pushed outwards in the horizontal direction transmitted to the pier stud 7 by the steel truss girder 1 are balanced, and the whole pier stud 7 is not stressed in the horizontal direction.

Further, the tie beam formwork 5 further includes an inner mold 53 for forming an inner cavity of the tie beam, and a side surface thereof is connected to the side mold 51 by a steel strand. Specifically, referring to fig. 3, the inner mold 53 serves to form an inner cavity of the tie beam to reduce the weight of the tie beam, and the inner mold 53 includes a top surface, side surfaces, and a partial bottom surface, wherein the side surfaces of the inner mold 53 and the side mold 51 of the tie beam formwork 5 are connected by means of a twisted wire, so that the inner mold 53 is suspended in the center of the tie beam formwork 5.

In some preferred embodiments, the steel truss girder 1 further comprises a plurality of operation platforms 12, each operation platform 12 is installed on the top of the steel truss girder 1 along the bridge direction, and each tensioning jack 2 partially extends out of one of the operation platforms 12. Specifically, referring to fig. 1 and 4, the operation platform 12 is provided to facilitate adjustment of a worker near the tensioning jack 2, and meanwhile, to protect safety of the worker, the general operation platform 12 has a bottom panel large enough for the worker to stand, and fences are provided around the bottom panel to prevent the worker from falling due to foot loss.

In some preferred embodiments, each of the above mentioned tensioning jacks 2 is located at the upper chord node of the steel truss. Specifically, steel truss 1 adopts truss structure, and wherein the last quarter part has a plurality of nodes of connecting near most member, and intensity is strongest, and the supporting effect is better, sets up tensioning jack 2 here and can play more effective supporting effect, prevents to fall.

The construction process of the present application is illustrated with the embodiment shown in fig. 1:

firstly, surveying and mapping the pier stud 7, finding the central position of the pier stud 7, installing the embedded part 6 at the central position of the pier stud 7, pouring a short part of a tie beam at the position where the tie beam is to be poured on the pier stud 7, mainly sealing the two ends of the tie beam template 5 for use, and simultaneously conveniently positioning the position of the tie beam template 5.

The tie beam template 5 is hoisted to the designed position through the crane, the end anchoring mechanisms 54 are installed at the two ends of the tie beam template 5, the other ends of the end anchoring mechanisms 54 are arranged at the edge of the top surface of the pier stud 7, the tie beam template 5 is temporarily fixed through the end anchoring mechanisms 54, and at the moment, the engineering machinery can be disconnected from the tie beam template 5 and is rotated to hoist the steel truss girder 1.

The steel truss girder 1 is hoisted to a preset position by the engineering machinery, and the corresponding position of the steel truss girder 1 is connected with the embedded part 6, so that the alignment and the fixation of the steel truss girder 1 are realized. After the steel truss girder 1 is installed in place, the hanging steel strand 3 is connected to the tensioning jack 2 on the steel truss girder 1, and the other end of the hanging steel strand 3 is connected to the tie beam template 5 through the anchoring device 4. And adjusting the tension force of the tension jack 2 to drive the hanging steel strand 3 to pull the tie beam template 5, so that the position of the tie beam template 5 reaches a preset position, and simultaneously the tension force of the hanging steel strand 3 and the tension force of the connecting strand 542 of the end anchoring mechanism 54 reach a preset ratio, so as to adjust the load distributed to the steel truss beam 1 and the end anchoring mechanism 54.

The tie beam is cast in the tie beam formwork 5 with the load being distributed over the steel trusses 1 and the end anchoring means 54, wherein the steel trusses 1 carry the majority of the load, wherein part of the load is set up by deformation of the steel trusses 1 as a horizontally outward moment, and the load distributed to the end anchoring means 54 is used to balance this moment.

After the strength of the tie beam to be cast reaches the preset requirement, firstly loosening the tensioning jack 2, after confirming that the tie beam is stable, dismantling the hanging steel strand 3 and the anchoring device 4, then dismantling the steel truss beam 1, and finally dismantling the side die 51, the bottom die 52 and the end part anchoring mechanism 54 of the tie beam template 5 to complete the tie beam construction.

In the description of the present application, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present application. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

It is noted that, in the present application, relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in the process, method, article, or apparatus that comprises the element.

The above description is merely exemplary of the present application and is presented to enable those skilled in the art to understand and practice the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. The utility model provides a steel truss cable suspension device that is used for high pile cap large-span tie beam to pour which characterized in that includes:

a tie beam formwork (5) for casting a tie beam;

the two ends of the steel truss girder (1) are respectively erected on two pier columns (7) to be constructed;

at least two tensioning jacks (2) are arranged at the top of the steel truss girder (1), and the output end of each tensioning jack (2) is vertically downward;

at least two hanging steel strands (3), wherein each hanging steel strand (3) is connected to the output end of each tensioning jack (2);

and the anchoring device (4) is used for connecting the tie beam template (5) and the hanging steel strand (3) and is arranged at one end of the hanging steel strand (3) far away from the tensioning jack (2).

2. The steel truss hanging device for pouring the long-span tie beam of the high pile cap according to claim 1, further comprising:

and the embedded part (6) is partially embedded in the pier column (7), and the steel truss girder (1) is installed on the pier column (7) through the embedded part (6).

3. The steel truss hanging device for pouring the long-span tie beam of the high pile cap according to the claim 2, is characterized in that: the embedded part (6) is arranged on the center line of the pier column (7).

4. The steel truss hanging device for high-rise pile cap large-span tie beam pouring according to claim 2, wherein the steel truss (1) further comprises:

and the bearing columns (11) are arranged between the embedded parts (6) and the corresponding ends of the steel trussed beams (1).

5. The steel truss hanger for high pilings long span tie beam casting of claim 1, wherein the tie beam formwork (5) comprises:

the side molds (51) are provided with a pair of side molds, and two ends of each side mold are respectively abutted against the two pier studs (7) to be constructed;

a bottom die (52), two ends of which are respectively abutted against the two pier studs (7) to be constructed;

the side surfaces of the bottom die (52) and the two pier studs (7) and the pair of side dies (51) jointly enclose a space for forming a pouring tie beam.

6. A steel truss hanger for high pilings long span tie beam casting according to claim 5, wherein the tie beam formwork (5) further comprises:

and the end part anchoring mechanism (54) is vertically arranged on the edge of the end surface of the pier stud (7), and the bottom end of the end part anchoring mechanism is arranged on the bottom die (52).

7. A steel truss hanger for high pile cap large span tie beam casting as claimed in claim 6 wherein the end anchoring mechanism (54) comprises:

a water stop baffle (541) arranged at the edge of the pier column (7);

and a connecting strand (542) having one end connected to the water stop baffle (541) and the other end connected to the bottom mold (52).

8. A steel truss hanger for high pilings long span tie beam casting according to claim 5, wherein the tie beam formwork (5) further comprises:

and the inner die (53) is used for forming the inner cavity of the tie beam, and the side surface of the inner die is connected to the side die (51) through a steel strand.

9. The steel truss hanging device for pouring the long-span tie beam of the high pile cap according to the claim 1, wherein the steel truss (1) further comprises:

and a plurality of operating platforms (12), wherein each operating platform (12) is installed on the top of the steel truss girder (1) along the bridge direction, and each tensioning jack (2) partially extends out of one operating platform (12).

10. The steel truss hanging device for pouring the long-span tie beam of the high pile cap according to the claim 1, is characterized in that: each tensioning jack (2) is positioned at the upper chord node of the steel truss.

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