CN116607427A - External hanging bracket for hollow pier top solid section construction and construction method - Google Patents

Abstract

The invention relates to the technical field of bridge pier body construction, and discloses an external hanger for the construction of a solid section at the top of a hollow pier, including an outer formwork, and the outer formwork is fixed on the outside of the hollow section concrete by a plurality of tensioning screws , a plurality of suspension beams are arranged above the outer formwork, two steel suspenders are arranged on each of the suspension beams, the lower end of the steel suspenders is provided with a load-bearing beam of the bottom mold, and the load-bearing beam of the bottom mold A plurality of bottom mold distribution beams are arranged, and a bottom mold panel is arranged on the bottom mold distribution beams. Also disclosed is a construction method for an external hanger used for the construction of the solid section of the top of a hollow pier, including: step S1, installing the external hanger; step S2, after the installation of the external hanger is completed, the The first layer of concrete is poured on the bottom form panel and the hollow section concrete in the external hanger. The hanger of the present invention has a simple structural system, can be used repeatedly, has fast construction efficiency, and has low safety risks.

Description

An external hanger for the construction of the solid section of the top of the hollow pier and its construction method

technical field

The invention relates to the technical field of bridge pier body construction, in particular to an external hanger and a construction method for the construction of a solid section at the top of a hollow pier.

Background technique

In the field of bridges, hollow thin-walled piers are widely used because of their high overall structural rigidity, light weight, large section modulus, good overall stability, and material saving. lot. For the design of high-speed railway bridge piers in my country, hollow thin-walled piers have been used as a general substructure. Its use has effectively promoted the standardization of railway bridge design in my country and greatly reduced the workload of engineering designers. However, the capping construction of the solid section of the hollow thin-walled pier has high safety risks, high construction difficulty, long construction period, and high economic cost investment. The selection of construction technology and the quality of construction will directly affect the overall quality of pier body construction. , is the key link of the whole pier body construction.

The common concrete prefabricated cover slab method, the method of erecting full-wall brackets in the inner cavity and the method of pre-embedded steel bars all have different defects in terms of technical difficulty, economic cost and safety risk. The external hanger and construction method.

Contents of the invention

The purpose of the present invention is to overcome the existing defects and provide an external hanger and construction method for the construction of the solid section of the top of the hollow pier. The hanger has a simple structure system, can be used repeatedly, and has fast construction efficiency and safety risks. Low.

The technical scheme for realizing the above-mentioned purpose is:

One of the present inventions is an external hanger for the construction of the solid section of the top of the hollow pier, comprising an outer formwork, the outer formwork is fixed on the outside of the hollow section concrete by a plurality of tensioning screws, and the outer formwork is provided with a A plurality of suspension beams, each of the suspension beams is provided with two steel suspenders, the lower end of the steel suspenders is provided with a bottom mold load-bearing beam, and the bottom mold load-bearing beam is provided with a plurality of bottom mold distribution beams, A bottom mold panel is arranged on the bottom mold distribution beam.

Preferably, the thickness of the outer die is 6mm, and the height is 6m. The paired pull screw adopts φ25 finish-rolled rebar, and the paired pull screw is vertically arranged in 3 rows, and each row is provided with 7 pieces. The outer die The lower end of the outer mold is fixed on the hollow section concrete by 2 rows of the paired pull screws through the hollow section concrete, and the upper end of the outer mold is fixed to the outer mold by 1 row of the pair drawn screws. fasten.

Preferably, the suspension beams are made of Shuangpin 14 industrial steel, and 6 suspension beams are equidistantly arranged on the outer formwork.

Preferably, the steel suspender is made of φ25 finish-rolled rebar, and the outer side of the steel suspender is sleeved with a PVC (hard polyvinyl chloride) pipe.

Preferably, the load-bearing beam of the bottom form is made of Shuangpin 12 industrial steel, and the load-bearing beam of the bottom form is fixed on the steel suspender by nuts.

Preferably, the distribution beam of the bottom form is made of 10 channel steel, and there are seven distribution beams of the bottom form with a distance of 20 cm.

Preferably, the bottom form panel is made of 18mm thick bamboo plywood, and the contact between the bottom form panel and the concrete of the hollow section is provided with glass glue.

Preferably, a plurality of stoppers are further included, and the plurality of stoppers are respectively arranged on the inside of the outer mold at both ends of each of the suspension beams.

The second aspect of the present invention relates to a construction method for an external hanger used for the construction of the solid section of the top of a hollow pier, comprising:

Step S1, installing an external hanger;

Step S2, after the external hanger is installed, the first layer of concrete is poured on the bottom form panel and hollow section concrete in the external hanger;

Step S3, after the concrete poured in the first layer reaches the design strength, after roughening the concrete poured in the first layer, pour a second layer of concrete on the concrete poured in the first layer;

Step S4, after the concrete poured on the second layer reaches the design strength, the external hanger in the pier is removed by using the ladder inside the pier.

Preferably, said step S1 includes:

Step S11, installing the outer formwork, and fixing the outer formwork on the outer side of the hollow section concrete by passing through the hole reserved in the concrete of the hollow section by the pair of pulling screws;

Step S12, fixing the suspension beam on the outer mold, and installing the limiter on the inner side of the outer mold to limit the suspension beam;

Step S13, fixing the upper end of the steel suspender on the suspension beam;

Step S14, fixing the load-bearing beam of the bottom form to the lower end of the steel suspender through nuts;

Step S15, fixing the distribution beam of the bottom mold on the load-bearing beam of the bottom mold;

Step S16, laying the bottom form panel on the bottom form distribution beam to complete the installation of the external hanger.

The beneficial effects of the present invention are: the present invention fixes the outer formwork on the concrete of the hollow section through the pull screw rod, and sets a suspension beam on the outer formwork, sets a steel suspension rod on the suspension beam, and then fixes it at the lower end of the steel suspension rod The load-bearing beam of the bottom form, the distribution beam of the bottom form is set on the load-bearing beam of the bottom form, and finally the bottom form panel is laid on the distribution beam of the bottom form, the first layer of concrete is poured on the hollow section concrete and the bottom form panel, and the first layer that has been poured is used Concrete is used as the bottom form for the second pouring, which improves the safety of construction; and the outer side of the steel suspender is sleeved with a PVC pipe, which can prevent welding slag from damaging the steel suspender, and the contact between the bottom form panel and the hollow section concrete is made of glass glue Blocking is carried out to ensure that no grout leaks during concrete pouring; the hanger has a simple structural system, technical feasibility, repeated turnover, fast construction efficiency, and low safety risks.

Description of drawings

Fig. 1 is a side view of an external hanger used for the construction of the solid section of the hollow pier pier top according to the present invention;

Fig. 2 is a top view of an external hanger used for the construction of the solid section of the top of the hollow pier according to the present invention;

Fig. 3 is a kind of flow chart of the construction method of the external hanger that is used for the solid section construction of hollow pier pier top according to the present invention;

Fig. 4 is a flowchart of installing an external hanger in the present invention.

In the figure: 1. Outer mold; 2. Pull screw; 3. Suspension beam; 4. Limiter; 5. Steel suspender; 6. Bearing beam of bottom mold; 7. Distribution beam of bottom mold; Panel; 9. Concrete in the hollow section.

Detailed ways

The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, or in a specific orientation. construction and operation, therefore, should not be construed as limiting the invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and should not be construed as indicating or implying relative importance.

The present invention will be further described below in conjunction with accompanying drawing.

As shown in Figure 1-2, an external hanger for the construction of the solid section of the top of a hollow pier includes an outer formwork 1, which is fixed on the outside of the hollow section concrete 9 by a plurality of tension screws 2, and the outer formwork 1 is provided with a plurality of suspension beams 3, and each suspension beam 3 is provided with two steel suspenders 5, and the lower end of the steel suspenders 5 is provided with a bottom mold load-bearing beam 6, and a bottom mold load-bearing beam 6 is provided with a plurality of bases. The mold distribution beam 7 is provided with a bottom mold panel 8 on the bottom mold distribution beam 7 .

An external hanger used for the construction of the solid section of the top of the hollow pier, further comprising a plurality of stoppers 4, which are respectively arranged inside the outer mold 1 at both ends of the suspension beam 3.

In the embodiment, the outer mold 1 has a thickness of 6mm and a height of 6m. The pull screw 2 is made of φ25 finish-rolled rebar. The pull screw 2 is vertically arranged in 3 rows, and each row is provided with 7 pieces. The lower end of the outer mold 1 is 2m high. The outer formwork 1 is fixed on the hollow section concrete 9 by 2 rows of opposite pull screws 2 passing through the hollow section concrete 9, the upper end of the outer form 1 is 4m high, and the outer form 1 is fastened by one row of opposite pull screws 2, and the outer formwork 1 is fastened by Pull the screw rod 2 to tightly hug the outer mold 1 on the hollow section concrete 9 .

In the embodiment, the suspension beam 3 is made of double 14 industrial steel, six suspension beams 3 are equidistantly arranged on the outer mold 1, and the suspension beam 3 is limited by the stopper 4, the stopper 4 is Suspension beam 3 quantity twice.

In the embodiment, the steel suspender 5 is made of φ25 fine-rolled rebar, and the outer side of the steel suspender 5 is sleeved with a PVC pipe to prevent damage to the steel suspender 5 by welding slag.

In the embodiment, the load-bearing beam 6 of the bottom form is made of double-strand 12 industrial steel, the load-bearing beam 6 of the bottom form is arranged in one-to-one correspondence with the suspension beam 3, and the load-bearing beam 6 of the bottom form is fixed on the steel suspender 5 by nuts.

In the embodiment, the bottom mold distribution beam 7 adopts 10 channel steel, and there are seven bottom mold distribution beams 7 with a spacing of 20 cm. In the horizontal direction, the bottom mold distribution beam 7 and the bottom mold load-bearing beam 6 are installed vertically.

In the embodiment, the bottom form panel 8 adopts 18mm thick bamboo plywood, and glass glue is arranged at the contact between the bottom form panel 8 and the hollow section concrete 9 to ensure that the poured concrete does not leak.

A construction method for an external hanger used for the construction of a solid section at the top of a hollow pier, comprising:

Step S1, install the external hanger; the specific installation steps are as follows.

Step S11 , installing the outer formwork 1 , and fixing the outer formwork 1 on the outside of the hollow section concrete 9 through the holes reserved by the hollow section concrete 9 through the pull screw 2 .

Step S12 , fixing the suspension beam 3 on the outer mold 1 , and installing the limiter 4 inside the outer mold 1 to limit the suspension beam 3 .

Step S13 , fixing the upper end of the steel suspension rod 5 on the suspension beam 3 .

Step S14, fixing the load-bearing beam 6 of the bottom form to the lower end of the steel suspender 5 through nuts.

Step S15, fixing the distribution beam 7 of the bottom form on the bearing beam 6 of the bottom form.

Step S16, laying the bottom form panel 8 on the bottom form distribution beam 7 to complete the installation of the external hanger.

Step S2, after the external hanger is installed, the first layer of concrete is poured on the bottom form panel 8 and the hollow section concrete 9 inside the external hanger.

Step S3, after the concrete poured in the first layer reaches the design strength, after roughening the concrete poured in the first layer, a second layer of concrete is poured on the concrete poured in the first layer.

Step S4, after the concrete poured on the second layer reaches the design strength, the external hanger in the pier is removed by using the ladder inside the pier, and the removal step is opposite to the installation step.

The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it can still be applied to the foregoing embodiments The technical solutions described in the examples are modified, or some or all of the technical features are equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims (10)

1. An external hanger for the construction of the solid section of the top of the hollow pier is characterized in that it comprises an outer mold (1), and the outer mold (1) is fixed on the hollow section by a plurality of pull screws (2) On the outside of the concrete (9), a plurality of suspension beams (3) are arranged above the outer formwork (1), and two steel suspension rods (5) are arranged on each suspension beam (3). The lower end of the suspender (5) is provided with a bottom mold load-bearing beam (6), and a plurality of bottom mold distribution beams (7) are arranged on the bottom mold load-bearing beam (6), and a bottom mold distribution beam (7) is provided with a bottom mold distribution beam (7). Formwork panels (8). 2. A kind of external hanger that is used for the construction of the solid section of the top of the hollow pier according to claim 1, characterized in that, the thickness of the outer formwork (1) is 6mm, and the height is 6m. (2) adopt φ 25 fine-rolled threaded steel, described pull screw rod (2) is vertically provided with 3 rows, and each row is provided with 7, and described outer mold (1) lower end is formed by 2 rows of described pull screw rods ( 2) passing through the hollow section concrete (9) and fixing the outer formwork (1) on the hollow section concrete (9), the upper end of the outer formwork (1) is formed by a row of the paired pull screws ( 2) Fasten the outer mold (1). 3. a kind of external hanger that is used for the solid section construction of hollow pier pier top according to claim 1, it is characterized in that, described suspension beam (3) adopts double 14 industrial steel, and described outer formwork ( 1) 6 said suspension beams (3) are equidistantly arranged on the top. 4. The external hanger for the construction of the solid section of the top of a hollow pier according to claim 1, wherein the steel hanger (5) adopts φ25 finish-rolled rebar, and the steel hanger (5) PVC pipe is socketed on the outside. 5. A kind of external hanger that is used for the construction of the solid section of the top of the hollow pier according to claim 3, it is characterized in that, the load-bearing beam (6) of the bottom mold adopts double 12 industrial steel, and the bottom mold The load-bearing beam (6) is fixed on the steel suspender (5) by nuts. 6. a kind of external hanger that is used for the solid section construction of hollow pier pier top according to claim 1, is characterized in that, described bottom mold distribution beam (7) adopts 10 channel steel, and described bottom mold distribution beam (7) There are 7 pieces with a distance of 20cm. 7. a kind of external hanger that is used for the construction of hollow pier pier top solid section according to claim 1, is characterized in that, described bottom form panel (8) adopts the thick bamboo plywood of 18mm, and described bottom form Glass glue is provided at the contact between the panel (8) and the concrete (9) of the hollow section. 8. The external hanger for the construction of the solid section of the top of the hollow pier according to claim 1, characterized in that it also includes a plurality of stoppers (4), and a plurality of stoppers (4) ) are respectively arranged on the inside of the outer formwork (1) at both ends of each of the suspension beams (3). 9. A kind of construction method for the external hanger that is used for the solid section construction of hollow pier pier top based on claim 1, it is characterized in that, comprises: Step S1, installing an external hanger; Step S2, after the external hanger is installed, the first layer of concrete is poured on the bottom form panel (8) and hollow section concrete (9) in the external hanger; Step S3, after the concrete poured in the first layer reaches the design strength, after roughening the concrete poured in the first layer, pour a second layer of concrete on the concrete poured in the first layer; Step S4, after the concrete poured on the second layer reaches the design strength, the external hanger in the pier is removed by using the ladder inside the pier. 10. A construction method for an external hanger used for the construction of a solid section at the top of a hollow pier according to claim 9, wherein the step S1 comprises: Step S11, installing the outer formwork (1), and fixing the outer formwork (1) to the hollow section concrete (9) through the hole reserved in the hollow section concrete (9) by the pull screw (2) ) outside; Step S12, fixing the suspension beam (3) on the outer formwork (1), and installing the stopper (4) on the inner side of the outer formwork (1), and fixing the suspension beam (3) (3) limit the position; Step S13, fixing the upper end of the steel suspension rod (5) on the suspension beam (3); Step S14, fixing the load-bearing beam (6) of the bottom mold on the lower end of the steel suspender (5) through nuts; Step S15, fixing the distribution beam (7) of the bottom mold on the load-bearing beam (6) of the bottom mold; Step S16, laying the bottom form panel (8) on the bottom form distribution beam (7) to complete the installation of the external hanger.