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Construction method of inverted-Y-shaped upper tower column closed section

A construction method and a technology for closing sections, which are applied in buildings, bridges, bridge parts, etc., can solve problems such as high construction quality requirements, high safety management requirements, and difficult engineering techniques, so as to achieve less surface defects, ensure engineering quality, and improve engineering quality effect

Active Publication Date: 2019-07-05
联建建设工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the section of the tower column changes with height, there are many embedded parts, the height is large, the construction quality requirements are high, there are certain difficulties in the construction, and the safety management requirements are high, resulting in engineering technical difficulties

Method used

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  • Construction method of inverted-Y-shaped upper tower column closed section
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  • Construction method of inverted-Y-shaped upper tower column closed section

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0078] as attached figure 1 As shown, an inverted Y-shaped bridge tower, the bridge tower is a reinforced concrete structure, and it adopts a special-shaped inverted Y-shaped bridge tower. The bridge tower includes two lower tower columns 1, two lower beams, two middle tower columns, an upper beam and an upper tower column from bottom to top.

[0079] The total height of the bridge tower is 99.074m, the tower height above the bridge deck is 85.062m, the height-span ratio is 0.532, the height of the tower below the bridge deck is 14.012m, and the center distance between the left and right tower columns at the bottom of the tower is 37.0m.

[0080] The bridge tower is divided into 24 sections from bottom to top. The lower column 1 is the 1-4# section, and the height of the lower column 1 is 14.012m. The lower tower column 1 adopts a rectangular solid section, and the section size changes from 4.2m (horizontal) X7.0m (longitudinal) to 7.0m (horizontal) X10.0m (longitudinal). T...

Embodiment 2-7

[0116] Concrete with low heat of hydration was mixed according to the above-mentioned low heat of hydration concrete, and Examples 2-7 were prepared, and the specific parameter ratios are shown in Table 1.

[0117] Table I

[0118]

[0119] Different concrete samples or reinforced concrete samples were prepared from the concrete obtained in Examples 2-7, and performance tests were performed.

[0120] Among them, the peak value of heat of hydration and the detection of the peak time of heat of hydration: the low heat of hydration concrete in this application is mainly used in large-volume concrete pouring, so the sample here is a solid concrete body of 2m*2m*2m. A box with an open top is built from a template, and a fixed frame made of steel bars with a diameter of 1.2cm is placed inside. The fixed frame is equipped with 27 temperature sensors at equal intervals in a space of 2m*2m*2m, and the temperature change is monitored by a computer. The prepared concrete is poured in...

Embodiment 8-11

[0149]A low-heat-of-hydration concrete, based on the low-heat-of-hydration concrete in Example 1, the gravel is mixed with low-hydration concrete before being sprayed with low-temperature water at 0-5°C to cool down, and then drained Keep the temperature of crushed stones at 10°C for mixed use, the amount of crushed stones is 980-1100 parts, and the specific parameters are shown in Table 7.

[0150] Table seven

[0151] Ambient temperature: 23°C, distribution water temperature: 18°C Example 8 Example 9 Example 10 Example 11 Slag cement / kg 80 80 80 80 Ordinary Portland cement / kg 210 210 210 210 Distribution water / kg 160 160 160 160 Sand / kg 730 730 730 730 Gravel / kg 980 985 1000 1100 Fly ash / kg 250 80 80 80 Ammonium sulfate / kg 22 210 210 210 Guar gum / kg 14 160 160 160 Water reducer / kg 4.2 730 730 730

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Abstract

The invention relates to the field of bridge construction, in particular to a construction method of an inverted-Y-shaped upper tower column closed section. A bridge tower is of a reinforced concretestructure, comprises two lower tower columns, two lower crossbeams, two middle tower columns, an upper crossbeam and an upper tower column, and is divided into 24 sections from bottom to top, whereinthe lower tower columns are arranged at the 1-4# sections, the middle tower columns are arranged at the 5-15# sections, the upper tower column is arranged at the 17-24# sections, the lower crossbeamsare arranged at the 4# section, and the upper crossbeam is arranged at the 16-17# sections and connected with the upper ends of the two closed middle tower columns. The bridge tower is constructed from bottom to top, a rolling over construction process and a hydraulic formwork creeping construction process are reasonably and organically combined for construction aiming at the reality, the construction period is shortened, the overall strength of the bridge tower is improved, the mechanization degree is high, construction is safe, wind resistance is high, the concrete appearance quality is significantly improved, and a construction site is civilized and clean; and during engineering, a concrete body is high in strength, and few in surface defect, and has good performance of resisting external erosion and temperature difference change, durability and anti-cracking performance are excellent, and the long-term engineering quality is guaranteed.

Description

technical field [0001] The invention relates to the field of bridge body construction, in particular to a construction method for the closing section of an inverted Y-shaped upper tower column. Background technique [0002] The main bridge of Ligui Bridge is a cable-stayed bridge with single tower and double cable plane prestressed concrete girder. The bridge tower is a reinforced concrete structure, and it adopts a special-shaped inverted Y-shaped bridge tower. The bridge tower includes the upper tower column, the middle tower column and the lower tower column. The total height of the bridge tower is 99.074m, of which the height of the upper tower column is 37.235m, the height of the middle tower column is 47.826m, and the height of the lower tower column is 14.012m; m, the height-span ratio is 0.532, the height of the tower below the bridge deck is 14.012m, and the distance between the centers of the left and right columns at the bottom of the tower is 37.0m. [0003] Th...

Claims

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Application Information

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IPC IPC(8): E01D21/00E01D19/02C04B28/08
CPCC04B28/08E01D19/02E01D21/00C04B7/02C04B14/06C04B14/02C04B18/08C04B22/147C04B24/38C04B2103/302
Inventor 何英张竹浓邓兴利方玉先
Owner 联建建设工程有限公司
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