阅读说明：本技术 一种钢-砼扭塔结构及其施工方法 (Steel-concrete torsion tower structure and construction method thereof ) 是由 胡义新 赵德宗 李志成 陈亮 林呈祥 吴霄 胡永波 周伟翔 叶君贤 杨萌 魏翔鹏 于 2021-06-24 设计创作，主要内容包括：本发明涉及一种钢-砼扭塔结构及其施工方法,其特征在于：其中钢-砼扭塔结构包括桥体主梁和沿桥体主梁长度方向间隔设置的扭塔,所述扭塔包括设在底部的承台、塔座和设在塔座上的主塔体,所述主塔体呈水滴状的拱形曲线,主塔体的断面呈矩形,主塔体中下部设有横梁,所述桥体主梁支撑在横梁上,所述主塔体两侧与桥体主梁自上而下牵拉有多根斜拉索。该钢-砼扭塔结构设计合理,施工高效、性价比高。(The invention relates to a steel-concrete torsion tower structure and a construction method thereof, which are characterized in that: wherein the steel-concrete is turned round the tower structure and is included the pontic girder and turn round the tower along the pontic girder length direction interval setting, turn round the tower including establishing cushion cap, the tower footing in the bottom and establishing the main tower body on the tower footing, the main tower body is the arch curve of water droplet form, and the section of main tower body is the rectangle, and the lower part is equipped with the crossbeam in the main tower body, the pontic girder supports on the crossbeam, main tower body both sides and pontic girder top-down tractive have many suspension cables. The steel-concrete torsion tower has reasonable structural design, high construction efficiency and high cost performance.)

1. A steel-concrete torsion tower structure is characterized in that: including the pontic girder and along the tower of turning round that pontic girder length direction interval set up, turn round the tower including establishing cushion cap, the tower socket in the bottom and establishing the main tower body on the tower socket, the main tower body is the arch curve of water droplet form, and the section of main tower body is the rectangle, and lower part is equipped with the crossbeam in the main tower body, the pontic girder supports on the crossbeam, main tower body both sides have many suspension cables with pontic girder top-down tractive.

2. The steel-concrete tower structure of claim 1, wherein: the main tower body comprises a lower tower column section, a middle tower column section and an upper tower column section, wherein the lower tower column section is of a prestressed concrete structure, the middle tower column section is of a steel-concrete combined structure, and the upper tower column section is of a steel structure.

3. The steel-concrete tower structure of claim 2, wherein: the tower base is in a frustum shape, the height of the tower base is 1.8 meters, the height of the lower tower column section is 5.63 meters, the height of the middle tower column section is 8.37 meters, and the height of the upper tower column section is 53.7 meters; the crossbeam is located the middle tower column section.

4. The steel-concrete tower structure of claim 3, wherein: the width of the rectangular section of the main tower body is increased from 3.0m at the top of the tower to 5.0m at the bottom of the tower along the bridge direction, and the width of the rectangular section of the main tower body is increased from 3.0m at the top of the tower to 5.5m at the bottom of the tower along the transverse bridge direction.

5. The steel-concrete tower structure of claim 4, wherein: the beam is a steel box beam component, and a steel-concrete combined section is arranged at the junction of the beam and the main tower body.

6. The steel-concrete tower structure of claim 4, wherein: the middle tower column section is a gradually-changed special-shaped section, the size of the bottom of the middle tower column section is 487.6cm multiplied by 464.4cm, the size of the top of the middle tower column section is 469.1cm multiplied by 387.9cm, and 28 prestressed steel bundles with the diameter of 15.2-19 are arranged in the single middle tower column section and the lower tower column section.

7. The steel-concrete tower structure of claim 4, wherein: the section of the upper tower column section is a rectangular steel shell, a Q345qD steel plate is adopted as a wall plate of the steel shell, and the plate thickness is 30-40 mm.

8. The steel-concrete tower structure of claim 4, wherein: the utility model discloses a concrete pouring tower, including the main tower body, the oblique pull cable distribution area of main tower body and following region all fill C50 concrete to at the inside counter-pulling reinforcing bar of cable tower steel construction, be used for preventing that the steel sheet is out of shape when filling the concrete, reinforcing bar horizontal interval is 50cm, every layer of reinforcing bar vertical interval is 60cm, at branch silk pipe arrangement region, reinforcing bar horizontal interval encrypts to 25cm, every layer of reinforcing bar vertical interval encrypts 20 cm.

9. A construction method of a steel-concrete torsion tower structure is characterized in that: the steel-concrete torsion tower structure comprises a main bridge body beam and torsion towers arranged at intervals along the length direction of the main bridge body beam, each torsion tower comprises a bearing platform arranged at the bottom, a tower base and a main tower body arranged on the tower base, each main tower body is a drop-shaped arched curve, the section of each main tower body is rectangular, a cross beam is arranged at the middle lower part of each main tower body, the main bridge body beam is supported on the cross beam, and a plurality of stay cables are drawn from top to bottom between the two sides of each main tower body and the main bridge body beam; during construction, a bearing platform and a tower base are firstly constructed, then a main tower body and a cross beam positioned on the main tower body are manufactured, and a main beam of a bridge body is laid on the cross beam.

The technical field is as follows:

the invention belongs to the field of bridge engineering, and particularly relates to a hybrid section steel-concrete combined torsion tower structure and a construction method thereof.

Background art:

bridge cable towers are common in A type, H type, diamond type and the like, the cable tower materials mainly adopt a reinforced concrete structure and a steel structure, a tower building machine or a hydraulic creeping formwork is adopted for the reinforced concrete tower, the construction period is long, and the construction difficulty of the twisted structure concrete cable tower is extremely high; the pure steel tower is adopted, the steel consumption is large, the manufacturing cost is high, the maintenance cost is high, the application of the cable tower with a steel-concrete structure is less, and the data shows that the Nanjing five-bridge is designed into a steel shell-concrete combined cable tower, a box-shaped structure is presented, the cable tower is a double-shell structure with an inner shell and an outer shell, two concrete structures are arranged on the same section, and the construction difficulty is high; at home and abroad, a mixed cable tower structure with a lower part of concrete and an upper part of a steel-concrete combined structure is not seen.

The invention content is as follows:

the invention aims to provide a steel-concrete torsion tower structure and a construction method thereof.

The invention relates to a steel-concrete torsion tower structure, which is characterized in that: including the pontic girder and along the tower of turning round that pontic girder length direction interval set up, turn round the tower including establishing cushion cap, the tower socket in the bottom and establishing the main tower body on the tower socket, the main tower body is the arch curve of water droplet form, and the section of main tower body is the rectangle, and lower part is equipped with the crossbeam in the main tower body, the pontic girder supports on the crossbeam, main tower body both sides have many suspension cables with pontic girder top-down tractive.

Further, the main tower body comprises a lower tower column section, a middle tower column section and an upper tower column section, wherein the lower tower column section is of a prestressed concrete structure, the middle tower column section is of a steel-concrete composite structure, and the upper tower column section is of a steel structure.

Further, the tower base is in a frustum shape, the height of the tower base is 1.8 m, the height of the lower tower column section is 5.63 m, the height of the middle tower column section is 8.37 m, and the height of the upper tower column section is 53.7 m; the crossbeam is located the middle tower column section.

Furthermore, the rectangular section of the main tower body is increased from 3.0m at the top of the tower to 5.0m at the bottom of the tower in the width direction of the bridge, and is increased from 3.0m at the top of the tower to 5.5m at the bottom of the tower in the width direction of the transverse bridge.

Furthermore, the beam is a steel box beam member, and a steel-concrete combined section is arranged at the junction of the beam and the main tower body.

Furthermore, the middle tower column section is a gradually-changed special-shaped section, the bottom size is 487.6cm multiplied by 464.4cm, the gradually-changed size is 469.1cm multiplied by 387.9cm, and 28 prestressed steel bundles with the diameter of 15.2-19 are arranged in the single middle tower column section and the single lower tower column section.

Furthermore, the section of the upper tower column section is a rectangular steel shell, a Q345qD steel plate is adopted as a wall plate of the steel shell, and the plate thickness is 30-40 mm.

Furthermore, the stay cable adopts the wire separating pipe cable saddle, the cable saddle is welded on the steel structure of the main tower body, C50 concrete is filled in the stay cable distribution area of the main tower body and the area below the stay cable distribution area, the steel plate is deformed when the concrete is filled in the cable tower steel structure, the horizontal interval of the steel bars is 50cm, the vertical interval of each layer of the steel bars is 60cm, the horizontal interval of the steel bars is encrypted to be 25cm in the wire separating pipe arrangement area, and the vertical interval of each layer of the steel bars is encrypted to be 20 cm.

The invention relates to a construction method of a steel-concrete torsion tower structure, which is characterized by comprising the following steps: the steel-concrete torsion tower structure comprises a main bridge body beam and torsion towers arranged at intervals along the length direction of the main bridge body beam, each torsion tower comprises a bearing platform arranged at the bottom, a tower base and a main tower body arranged on the tower base, each main tower body is a drop-shaped arched curve, the section of each main tower body is rectangular, a cross beam is arranged at the middle lower part of each main tower body, the main bridge body beam is supported on the cross beam, and a plurality of stay cables are drawn from top to bottom between the two sides of each main tower body and the main bridge body beam; during construction, a bearing platform and a tower base are firstly constructed, then a main tower body and a cross beam positioned on the main tower body are manufactured, and a main beam of a bridge body is laid on the cross beam.

The steel-concrete torsion tower structure has the beneficial effects that:

the stress is clear: different structures are adopted at different stress parts, a prestressed concrete structure is adopted when the load of the lower tower column is large, a steel-concrete combined structure is adopted for the middle tower column, a steel structure is adopted for the intersection part of the upper tower columns, the stress transmission of the structure is clear, and the stress distribution is uniform.

Secondly, the construction is efficient: the thin-wall steel manufactured in factories is directly used as the outer mold for the construction of the solid concrete on the inner side, the construction speed is high compared with that of a reinforced concrete cable tower, and the construction period can be effectively shortened.

③ the performance price ratio is high: the use function and the stress performance are both stronger, and the economy is better compared with a pure steel structure.

Fourthly, the appearance is beautiful: the twisted arch structure is similar to a water drop in a conventional cable tower structure, has certain artistic value and attractive effect at various visual angles, and can become a new urban landmark by adopting the shape in a city.

Description of the drawings:

FIG. 1 is a schematic view of the front view configuration of the present invention;

FIG. 2 is a partial top view of FIG. 1;

FIG. 3 is a view from direction K of FIG. 1;

FIG. 4 is a schematic view of the partial cross-sectional configuration of FIG. 3;

FIG. 5 is a partial view of the upper tower section;

FIG. 6 is a partial view of the upper column section (with the stay cable sections provided);

FIG. 7 is a cross-sectional view taken along line M-M in FIGS. 5 and 6;

FIG. 8 is a cross-sectional view taken along line N-N of FIGS. 5 and 6;

FIG. 9 is a sectional view taken along line H-H of FIG. 7;

FIG. 10 is a top view of a partial configuration of an embodiment of the present invention;

FIG. 11 is a sectional view taken along line A-A of FIG. 10;

FIG. 12 is a cross-sectional view taken along line B-B of FIG. 10;

FIG. 13 is a cross-sectional view taken along line C-C of FIG. 10;

FIG. 14 is a cross-sectional view taken along line D-D of FIG. 10;

FIG. 15 is a schematic view of a cross-sectional arrangement of a steel bed die in an embodiment of the present invention;

FIG. 16 is a schematic view of the connection between the cross beams and the main longitudinal beams according to the embodiment of the present invention;

FIG. 17 is a schematic view of the connection between the cantilever steel beam and the side secondary longitudinal steel beam in the embodiment of the present invention.

The specific implementation mode is as follows:

the steel-concrete torsion tower structure comprises a main bridge beam 1 and torsion towers 2 arranged at intervals along the length direction of the main bridge beam 1, wherein each torsion tower 2 comprises a bearing platform 3 arranged at the bottom, a tower seat 4 and a main tower body 5 arranged on the tower seat.

The main tower body 5 is a drop-shaped arch curve, the section of the main tower body 5 is rectangular, a cross beam 6 is arranged at the middle lower part of the main tower body, the bridge girder 1 is supported on the cross beam 6, and a plurality of stay cables 7 are drawn from top to bottom between the two sides of the main tower body 5 and the bridge girder.

The main tower body 5 comprises a lower tower column section 8, a middle tower column section 9 and an upper tower column section 10, wherein the lower tower column section 8 is of a prestressed concrete structure, the middle tower column section is of a steel-concrete composite structure, and the upper tower column section is of a steel structure.

Wherein the tower base is in a frustum shape, the height of the tower base is 1.8 meters, the height of the lower tower column section is 5.63 meters, the height of the middle tower column section is 8.37 meters, and the height of the upper tower column section is 53.7 meters; the cross beam is positioned on the middle tower column section; the width of the rectangular section of the main tower body is increased from 3.0m at the top of the tower to 5.0m at the bottom of the tower in the bridge direction, and the width of the rectangular section of the main tower body is increased from 3.0m at the top of the tower to 5.5m at the bottom of the tower in the transverse bridge direction.

The middle tower column section is a gradually-changed special-shaped section, the bottom size is 487.6cm multiplied by 464.4cm, the gradually-changed size is 469.1cm multiplied by 387.9cm, and 28 prestressed steel bundles 11 with the diameter of 15.2-19 are arranged in the single middle tower column section and the single lower tower column section, so that the mechanical properties of the middle tower column section and the lower tower column section are improved.

The section of the upper tower column section is a rectangular steel shell, a Q345qD steel plate is adopted as a wall plate of the steel shell, and the thickness of the plate is 30-40 mm; the suspension cable adopts and divides silk pipe cable saddle, and the cable saddle welds on the steel construction of main tower body, and the suspension cable distribution area of main tower body all pours C50 concrete into below the region to at the inside steel bar that draws of cable tower steel construction, be used for preventing to pour the steel sheet when concrete into and warp, the reinforcing bar horizontal spacing is 50cm, and every layer of reinforcing bar vertical spacing is 60cm, divides silk pipe arrangement region, and the reinforcing bar horizontal spacing encrypts to be 25cm, and every layer of reinforcing bar vertical spacing encrypts 20 cm.

The beam is a steel box beam component, and a steel-concrete combined section is arranged at the junction of the beam and the main tower body.

The invention relates to a construction method of a steel-concrete torsion tower structure, which is characterized by comprising the following steps: the steel-concrete torsion tower structure comprises a main bridge body beam and torsion towers arranged at intervals along the length direction of the main bridge body beam, each torsion tower comprises a bearing platform arranged at the bottom, a tower base and a main tower body arranged on the tower base, each main tower body is a drop-shaped arched curve, the section of each main tower body is rectangular, a cross beam is arranged at the middle lower part of each main tower body, the main bridge body beam is supported on the cross beam, and a plurality of stay cables are drawn from top to bottom between the two sides of each main tower body and the main bridge body beam; during construction, a bearing platform and a tower base are firstly constructed, then a main tower body and a cross beam positioned on the main tower body are manufactured, and a main beam of a bridge body is laid on the cross beam.

The bridge girder 100 is divided into a standard section and weight sections positioned at two ends of the standard section, a bridge deck 200 is arranged on the bridge girder 100, the bridge girder 100 comprises main longitudinal steel beams 110 positioned at two sides, cross beams 120 for connecting the main longitudinal steel beams at the two sides are arranged at intervals on the standard section of the main longitudinal steel beams, an intermediate secondary longitudinal steel beam 130 is connected between every two adjacent cross beams, and the intermediate secondary longitudinal steel beam 130 is arranged at the central line position of the main bridge; the main longitudinal steel beams 110 are provided with a ballast steel box 140 connecting the main longitudinal steel beams 110 at two sides at a ballast section; the standard section of the main longitudinal steel beam 110 adopts an I-shaped steel beam 122 except that the cross beam at the main tower adopts a steel box beam 121, the steel box beam 121 adopts a box-shaped section, the height of the midspan beam is 2.6m, and the length of the midspan beam is 22.3 m; steel outriggers 150 are arranged at intervals outside the main longitudinal steel beams, and side secondary longitudinal steel beams 160 are connected between the steel outriggers; the bridge girder adopts a steel-concrete combined structure, adopts different structures at different stress parts, has light steel structure weight, can adopt a quick pushing construction process, has clear load transfer, stable and reliable structure and convenient and quick construction; the steel box girder has strong use function and stress performance, and has better economy compared with the steel box girder and the conventional steel-concrete combined girder structure.

In this embodiment, main girder steel 110 cross-section is the C type, secondary girder steel 130 cross-section in the middle is the I shape, and the interval between the steel outrigger 150 is 9m, and the interval between the crossbeam 120 is 4.5m, main girder steel in the middle comprises a plurality of sections, and every section length is 4.5~9m, and every interval 4.5m sets up a crossbeam, and every interval 9.0m sets up an outrigger, and secondary girder steel in the middle sets up at main bridge center line position.

In this embodiment, the steel outrigger 150 has an i-shaped cross section, the bottom surface of the steel outrigger is an inclined surface with a lower inward end and a higher outward end, and the height of the cross section of the steel outrigger gradually changes from 0.47m of the outer end to 1.58m of the root; the side secondary longitudinal steel beam 160 adopts an I-shaped section with an inclined bottom plate, and the bottom surface of the bottom plate of the side secondary longitudinal steel beam is flush with the bottom surface of the steel cantilever beam; the novel cable-stayed bridge combination beam is formed by adopting a C-shaped main beam structure, an I-shaped secondary beam structure, a precast concrete bridge deck structure and a cast-in-place concrete structure with a steel shell bottom at the side, and the structure is simple and compact.

In this embodiment, the upper supporting surface of the main beam 100 of the bridge body is a slope surface with a high middle part and two side bottoms, the slope is 1.5%, the beam height is 2.86m (the position of the central line of the road), and the full width is 36 m; the bridge deck 200 consists of a motor vehicle road and bridge deck 210 in the middle and non-motor vehicle road and bridge decks 220 on two sides, sidewalk plate steel 300 is installed on the outer side of the non-motor vehicle road and bridge deck, and the non-motor vehicle road and bridge deck 220 and the sidewalk plate steel 300 are positioned above the steel cantilever beam 150; the walkway plate steel 300 bypasses the main tower at the main tower.

In this embodiment, the thickness of the bridge deck 200 is 26cm, the non-motor vehicle road and bridge deck 220 is of a cast-in-place concrete structure, and a steel bottom formwork 230 laid on a steel cantilever beam is arranged at the bottom of the non-motor vehicle road and bridge deck; the motor vehicle road and bridge deck is formed by connecting prefabricated bridge deck boards 211 through cast-in-place wet joints 212; the bridge deck of the concrete structure adopts a cast-in-place concrete structure which is prefabricated, installed and combined with a strip steel bottom die, and the construction is convenient and rapid; the upper surface of the cantilever beam is of a cast-in-place concrete structure except the sidewalk plate steel, a permanent steel bottom die is arranged in a wet joint area of the upper surface of the cantilever beam, and the cantilever beam is used as a non-motor vehicle lane after concrete is poured.

In the embodiment, the prefabricated bridge deck 211 is made of C50 concrete, the cast-in-place wet joint 212 is made of C50 low-shrinkage fiber concrete, and the steel beam is connected with the bridge deck through shear nails; except that the main longitudinal steel beam top prefabricated bridge deck horizontal steel bars are connected through binding, the prefabricated bridge deck longitudinal and horizontal steel bars at other positions are all connected through welding.

In the present embodiment, the ballast section is symmetrical as a whole about the mid-span centerline and the road centerline. The whole ballast section bridge floor is positioned in the same longitudinal slope on the longitudinal section, and the longitudinal slope is 0.5 percent. The horizontal projection length of the ballast weight section is 10.05m, the full width is 36m, and the height of a beam at the center of a road is 2.6 m.

The construction method of the bridge girder 100 comprises the following steps: (1) after the lower structure is built, erecting a bridge girder by adopting a hoisting or pushing method; the bridge girder is divided into a standard section and ballast sections positioned at two ends of the standard section, the standard section of the bridge girder is divided into a plurality of sections, and except that a midspan section consists of 2 main longitudinal steel beams, 1 cross beam and 2 middle secondary longitudinal steel beams, each of the other sections consists of 2 main longitudinal steel beams, 2 cross beams and 2 middle secondary longitudinal steel beams; a steel cantilever beam is arranged on the outer side of the main longitudinal steel beam at intervals of 9.0 m; (2) after the bridge girder is erected, laying a prefabricated bridge deck on the upper side of the bridge girder between the main longitudinal steel beams on the two sides and connecting the prefabricated bridge deck through cast-in-place wet joints to form a motor vehicle road and bridge deck; the motor vehicle lane bridge deck is prefabricated in blocks, and is divided into 2 prefabricated bridge deck boards in the transverse direction in a mode of connecting cast-in-place wet joints among the boards, 3 longitudinal cast-in-place joints are formed in total, the thickness of a prefabricated bridge deck board is 260mm, the longitudinal length is 4.0m and 2.3m, and the transverse length is 11.7 m; (3) laying a steel bottom die on the upper side of the steel cantilever beam, and then casting a non-motor vehicle lane bridge deck with a concrete structure in situ; the steel bottom die is transversely positioned between the side secondary longitudinal steel beam and the main longitudinal steel beam; (4) installing sidewalk plate steel positioned on the outer side of a non-motor vehicle road and bridge panel on the upper side of the steel cantilever beam; and finally, paving asphalt surface layers on the upper sides of the non-motor vehicle road bridge deck and the motor vehicle road bridge deck.

The steel-concrete torsion tower structure has the beneficial effects that:

the stress is clear: different structures are adopted at different stress parts, a prestressed concrete structure is adopted when the load of the lower tower column is large, a steel-concrete combined structure is adopted for the middle tower column, a steel structure is adopted for the intersection part of the upper tower columns, the stress transmission of the structure is clear, and the stress distribution is uniform.

Secondly, the construction is efficient: the thin-wall steel manufactured in factories is directly used as the outer mold for the construction of the solid concrete on the inner side, the construction speed is high compared with that of a reinforced concrete cable tower, and the construction period can be effectively shortened.

③ the performance price ratio is high: the use function and the stress performance are both stronger, and the economy is better compared with a pure steel structure.

Fourthly, the appearance is beautiful: the twisted arch structure is similar to a water drop in a conventional cable tower structure, has certain artistic value and attractive effect at various visual angles, and can become a new urban landmark by adopting the shape in a city.

Finally, it should be noted that the above examples are only used to illustrate the technical solutions of the present invention and not to limit the same; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art will understand that: modifications to the specific embodiments of the invention or equivalent substitutions for parts of the technical features may be made; without departing from the spirit of the present invention, it is intended to cover all aspects of the invention as defined by the appended claims.