A construction method for cross-section anchor pipes

Abstract

The present invention provides a construction method for cross-section anchor pipes, which relates to the technical field of bridge manufacturing. The construction method for cross-section anchor pipes includes correspondingly installing each section of the segmented anchor pipes on different sections of the steel tower in a factory; erecting the nth section of the steel tower; erecting the (n + 1)th section of the steel tower; and sealingly connecting the anchor pipe filling section between the segmented anchor pipe on the nth section of the steel tower and the segmented anchor pipe on the (n + 1)th section of the steel tower. Compared with the prior art, the construction method for the cross-section anchor pipes of the present invention reduces the construction difficulty of the cross-section anchor pipes, has less workload and lower risk.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge manufacturing, and more particularly, to a construction method for cross-section anchor pipes. Background Art

[0002] As a material widely used in cable-stayed bridges, anchor pipes have guiding and sealing functions. In cable-stayed bridges, especially in steel tower structures, they are essential materials. For example, in the actual construction of the steel tower of the Ma'anshan Extra-large Bridge, the anchor pipes are relatively long and often pass through the tower wall and diaphragms, spanning 2 sections, and some even span 3 sections. If the 3 sections are connected into one body, the height of the steel tower will exceed 25 meters and the weight will exceed 3,000 tons. Affected by transportation and hoisting, the three sections cannot be connected into one body. Therefore, after multiple sections are erected on the construction site, the anchor pipes need to be installed. If the length of the anchor pipe spans 3 sections, it is necessary to penetrate the anchor pipe into the tower wall at an altitude of nearly 300 meters, and then pass through 6 diaphragms to finally reach the anchor box position. The construction at such a high altitude is difficult, with a large workload and high risk. Summary of the Invention

[0003] The problem to be solved by the present invention is: how to solve the problem of large construction difficulty of cross-section anchor pipes.

[0004] To achieve the above object, the technical solution of the present invention is as follows:

[0005] A construction method for cross-section anchor pipes, comprising:

[0006] Correspondingly installing each section of the segmented anchor pipe on different sections of the steel tower in the factory;

[0007] Erecting the nth section of the steel tower;

[0008] Erecting the (n + 1)th section of the steel tower;

[0009] Sealing and connecting the anchor pipe filling section between the segmented anchor pipe on the nth section of the steel tower and the segmented anchor pipe on the (n + 1)th section of the steel tower.

[0010] The construction method for cross-section anchor pipes provided by the present invention, compared with the prior art, has but is not limited to the following beneficial effects:

[0011] The construction method of the cross-segment anchor pipe according to the present invention assembles the relatively long anchor pipe in a segmented form. First, the factory installs the segmented anchor pipes on different segments of the steel tower correspondingly, that is, there is a certain distance interruption between the segmented anchor pipe on the nth segment of the steel tower and the segmented anchor pipe on the (n + 1)th segment of the steel tower, and this distance is used to install the anchor pipe filling section. The anchor pipe filling section is installed during the erection process of the steel tower segments. After the erection of the nth segment and the (n + 1)th segment of the steel tower is completed, the anchor pipe filling section is hermetically connected between the segmented anchor pipe on the nth segment of the steel tower and the segmented anchor pipe on the (n + 1)th segment of the steel tower. The construction method of this cross-segment anchor pipe replaces the traditional relatively long anchor pipe with segmented anchor pipes and an anchor pipe filling section. First, the segmented anchor pipes are installed on the steel tower segments in the factory, and the anchor pipe filling section 5 is installed at the construction site. This construction method of the cross-segment anchor pipe reduces the construction difficulty of installing the anchor pipe at high altitude. The construction method of this cross-segment anchor pipe reduces the construction difficulty of the cross-segment anchor pipe compared with the prior art, with less workload and lower danger.

[0012] Optionally, before erecting the nth segment of the steel tower, the construction method of the cross-segment anchor pipe further includes:

[0013] Install a first flange at the end of the segmented anchor pipe on the nth segment of the steel tower close to the segmented anchor pipe on the (n + 1)th segment of the steel tower.

[0014] Install a second flange at the end of the segmented anchor pipe on the (n + 1)th segment of the steel tower close to the segmented anchor pipe on the nth segment of the steel tower.

[0015] Optionally, before erecting the nth segment of the steel tower, the construction method of the cross-segment anchor pipe further includes:

[0016] Set a third flange at one end of the anchor pipe filling section for mating connection with the first flange, and the third flange is fixedly installed after actually measuring and cutting the anchor pipe filling section on the construction site. The cut end of the anchor pipe filling section is the end close to the third flange;

[0017] Set a fourth flange at the other end of the anchor pipe filling section for mating connection with the second flange, and the fourth flange is fixedly installed in the factory.

[0018] Optionally, the actual measurement and cutting include:

[0019] Measure the distance between the segmented anchor pipe on the nth segment of the steel tower and the segmented anchor pipe on the (n + 1)th segment of the steel tower, and cut the anchor pipe filling section according to the actually measured distance.

[0020] Optionally, between the segmented anchor pipes that sealingly connect the anchor pipe patching section to the n-th segment of the steel tower and the segmented anchor pipes on the (n + 1)-th segment of the steel tower, there is included:

[0021] Install a sealing ring between the second flange and the fourth flange, and tighten the second flange and the fourth flange with bolts.

[0022] Optionally, between the segmented anchor pipes that sealingly connect the anchor pipe patching section to the n-th segment of the steel tower and the segmented anchor pipes on the (n + 1)-th segment of the steel tower, there is included:

[0023] Install a sealing ring between the first flange and the third flange, and tighten the first flange and the third flange with bolts.

[0024] Optionally, after installing the sealing ring between the first flange and the third flange and tightening the first flange and the third flange with bolts, the construction method of the cross-segment anchor pipe further includes:

[0025] Weld and fix the third flange to the anchor pipe patching section.

[0026] Optionally, before installing the first flange, the second flange, the third flange, and the fourth flange, the connecting surfaces are respectively machined to improve the flatness and connection accuracy of the connecting surfaces.

[0027] Optionally, at least eight connecting holes are spaced apart on the first flange and the second flange.

[0028] Optionally, before erecting the n-th segment of the steel tower, the construction method of the cross-segment anchor pipe further includes:

[0029] Machine-process the two end surfaces of the anchor pipe patching section to improve the flatness and connection accuracy of the end surfaces. Description of the Drawings

[0030] Figure 1 is a flowchart of the construction method of the cross-segment anchor pipe according to an embodiment of the present invention;

[0031] Figure 2 is a structural schematic of the construction method of the cross-segment anchor pipe according to an embodiment of the present invention Figure 1 ;

[0032] Figure 3 is a structural schematic of the construction method of the cross-segment anchor pipe according to an embodiment of the present invention Figure 2 ;

[0033] Figure 4 is a structural schematic of the construction method of the cross-segment anchor pipe according to an embodiment of the present inventionFigure 3 ;

[0034] Figure 5 Structural schematic of the construction method of the cross-section anchor pipe according to the embodiment of the present invention Figure 4 。

[0035] Description of reference numerals:

[0036] 1, steel tower; 2, anchor pipe; 3, segmented anchor pipe on the nth section; 31, first flange; 4, segmented anchor pipe on the (n + 1)th section; 41, second flange; 5, anchor pipe filling section; 51, third flange; 52, fourth flange; 6, tower wall; 7, partition board. Detailed implementation manners

[0037] In order to make the above objects, features and advantages of the present invention more obvious and understandable, the following detailed description of the specific embodiments of the present invention will be given with reference to the accompanying drawings.

[0038] In the description of the present invention, the orientation or positional relationship indicated by "upper", "lower", "left", "right", "top", "bottom", "front", "rear", "inner" and "outer" is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention, rather than indicating or implying that the device referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the protection scope of the present invention.

[0039] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "set", "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0040] In the description of this specification, the descriptions referring to terms such as "embodiment", "one embodiment" and "one implementation manner" mean that the specific features, structures, materials or characteristics described in connection with the embodiment or implementation manner are included in at least one embodiment or implementation manner of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or implementation manner. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or implementation manners in a suitable manner.

[0041] Moreover, the Z-axis in the drawings represents the vertical direction, that is, the up and down positions, and the positive direction of the Z-axis (that is, the arrow direction of the Z-axis) represents up, and the negative direction of the Z-axis (that is, the direction opposite to the positive direction of the Z-axis) represents down.

[0042] It should be noted that the above description of the meaning of the Z-axis is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0043] As Figures 1 to 4 shown, a construction method of a cross-section segment anchor pipe according to an embodiment of the present invention includes:

[0044] Step S1, correspondingly installing each section of the segmented anchor pipe on different sections of the steel tower in the factory;

[0045] Step S2, erecting the nth section of the steel tower;

[0046] Step S3, erecting the (n + 1)th section of the steel tower;

[0047] Step S4, hermetically connecting the anchor pipe filling section between the segmented anchor pipe on the nth section of the steel tower and the segmented anchor pipe on the (n + 1)th section of the steel tower.

[0048] In this embodiment, as shown in the attached Figures 1 to 4 figure, this anchor pipe 2 is relatively long and spans multiple sections of the steel tower 1. If multiple sections of the steel tower are connected into one body, the height of the steel tower 1 will exceed 25 meters and the weight will exceed 3,000 tons. Affected by transportation and hoisting, multiple sections of the steel tower cannot be connected into one body. Therefore, after multiple sections of the steel tower are erected on the construction site, the anchor pipe 2 needs to be installed. If the length of the anchor pipe 2 spans 3 sections, it is necessary to penetrate the anchor pipe 2 into the tower wall 6 of the steel tower 1 at an altitude of nearly 300 meters, and then pass through 6 partition plates 7, and finally reach the anchor box position. The construction difficulty at extremely high altitudes is relatively large. In view of the above problems, the construction method of this cross-section segment anchor pipe assembles the relatively long anchor pipe in a segmented form. First, each section of the segmented anchor pipe is correspondingly installed on different sections of the steel tower. That is, there is a certain distance interruption between the segmented anchor pipe 3 on the nth section of the steel tower and the segmented anchor pipe 4 on the (n + 1)th section of the steel tower (as shown in the attached Figure 3 figure), and this distance is used to install the anchor pipe filling section 5 (as shown in the attached Figure 4As shown, the anchor pipe repair section 5 is installed during the erection of the steel tower segments. After the erection of the nth and (n + 1)th segments of the steel tower is completed, the anchor pipe repair section 5 is hermetically connected between the segmented anchor pipe 3 on the nth segment of the steel tower and the segmented anchor pipe 4 on the (n + 1)th segment of the steel tower. The construction method of this cross-segment anchor pipe replaces the traditional long anchor pipe 2 with segmented anchor pipes and the anchor pipe repair section 5. First, the segmented anchor pipes are installed on the steel tower segments in the factory, and the anchor pipe repair section 5 is installed at the construction site. This construction method of the cross-segment anchor pipe reduces the construction difficulty of installing the anchor pipe at high altitude. Compared with the prior art, the construction method of this cross-segment anchor pipe reduces the construction difficulty of the cross-segment anchor pipe, has less workload, and lower risk.

[0049] During the above work process, "installing each section of the segmented anchor pipe corresponding to different segments of the steel tower in the factory" specifically means that each section of the segmented anchor pipe penetrates through the partition plate 7 of each steel tower segment correspondingly. In addition, before erecting the nth segment of the steel tower, the anchor pipe repair section can be placed on the partition plate 7 of the nth segment of the steel tower, and the hoisting of the anchor pipe repair section 5 is realized through the process of erecting the nth segment of the steel tower.

[0050] Optionally, before erecting the nth segment of the steel tower, the construction method of the cross-segment anchor pipe further includes:

[0051] Installing a first flange 31 at the end of the segmented anchor pipe 3 on the nth segment of the steel tower close to the segmented anchor pipe 4 on the (n + 1)th segment of the steel tower;

[0052] Installing a second flange 41 at the end of the segmented anchor pipe 4 on the (n + 1)th segment of the steel tower close to the segmented anchor pipe 3 on the nth segment of the steel tower.

[0053] In this embodiment, as shown in the attached Figure 3 figure, the nth segment refers to the lower steel tower segment, the (n + 1)th segment corresponds to the steel tower segment adjacent above the nth segment. The first flange 31 can be connected to the upper end of the segmented anchor pipe 3 on the nth segment by welding (in the Z-axis direction in the attached Figure 3 figure), the second flange 41 can be connected to the lower end of the segmented anchor pipe 4 on the (n + 1)th segment by welding, and the anchor pipe repair section 5 can be connected between the first flange 31 and the second flange 41.

[0054] Optionally, before erecting the nth segment of the steel tower, the construction method of the cross-segment anchor pipe further includes:

[0055] Setting a third flange 51 at one end of the anchor pipe repair section 5 for mating connection with the first flange 31, and the third flange 31 is fixedly installed after the anchor pipe repair section 5 is actually measured and cut on the construction site. The cut end of the anchor pipe repair section 5 is the end close to the third flange 51;

[0056] A fourth flange 52 for mating connection with the second flange 41 is provided at the other end of the anchor pipe filling section 5, and the fourth flange 52 is fixedly installed at the factory.

[0057] In this embodiment, in combination with the attached Figure 4 As shown, the third flange 51 can be connected to the lower end of the anchor pipe filling section 5 by welding (in the opposite direction of the Z-axis in the attached Figure 4 However, it should be noted that the third flange 51 needs to be welded and fixed after the anchor pipe filling section 5 is actually measured and cut on-site at the construction site. Because there are certain errors to a certain extent after the installation of the nth section and the (n + 1)th section of the steel tower, the accurate distance between the segmented anchor pipe 3 on the nth section and the segmented anchor pipe 4 on the (n + 1)th section of the steel tower cannot be measured before installation. Therefore, the third flange 51 needs to be welded and fixed after the anchor pipe filling section 5 is actually measured and cut on-site at the construction site. It can be understood that the cut end of the anchor pipe filling section 5 is the end close to the third flange 51. In addition, the fourth flange 52 can be connected to the upper end of the anchor pipe filling section 5 by welding (in the positive direction of the Z-axis in the attached Figure 4 ), and the fourth flange 52 can be welded and fixed at the factory.

[0058] Optionally, the actual measurement and cutting include:

[0059] Measuring the distance between the segmented anchor pipe on the nth section of the steel tower and the segmented anchor pipe on the (n + 1)th section of the steel tower, and cutting the anchor pipe filling section according to the actually measured distance.

[0060] In this embodiment, in combination with the attached Figures 4 to 5 As shown, before installing the anchor pipe filling section 5, first measure the distance between the segmented anchor pipe 3 on the nth section and the segmented anchor pipe 4 on the (n + 1)th section, then cut the anchor pipe filling section 5 according to the actually measured distance, then install the anchor pipe filling section 5 between the segmented anchor pipe 3 on the nth section and the segmented anchor pipe 4 on the (n + 1)th section, then tighten the second flange 41 and the fourth flange 52 with bolts, tighten the first flange 31 and the third flange 51 with bolts, and finally weld the third flange 51 to the anchor pipe filling section 5.

[0061] Optionally, the sealing connection of the anchor pipe filling section between the segmented anchor pipe on the nth section of the steel tower and the segmented anchor pipe on the (n + 1)th section of the steel tower includes:

[0062] Install a sealing ring between the second flange 41 and the fourth flange 52, and tighten the second flange 41 and the fourth flange 52 with bolts.

[0063] In this embodiment, in combination with the attached Figure 5As shown, when installing the anchor pipe repair section 5, it is necessary to install a sealing ring between the second flange 41 and the fourth flange 52, and then tighten the second flange 41 and the fourth flange 52 with bolts to ensure the sealing between the anchor pipe repair section 5 and the sectional anchor pipe 4 on the (n + 1)-th segment.

[0064] Optionally, the sealing connection of the anchor pipe repair section between the sectional anchor pipe on the n-th segment of the steel tower and the sectional anchor pipe on the (n + 1)-th segment of the steel tower includes:

[0065] Install a sealing ring between the first flange 31 and the third flange 51, and tighten the first flange 31 and the third flange 51 with bolts.

[0066] In this embodiment, in combination with the attached Figure 5 As shown, when installing the anchor pipe repair section 5, it is necessary to install a sealing ring between the first flange 31 and the third flange 51, and then tighten the first flange 31 and the third flange 51 with bolts to ensure the sealing between the anchor pipe repair section 5 and the sectional anchor pipe 4 on the (n + 1)-th segment.

[0067] Optionally, after installing the sealing ring between the first flange 31 and the third flange 51 and tightening the first flange 31 and the third flange 51 with bolts, the construction method of the cross-segment anchor pipe further includes:

[0068] Weld and fix the third flange 51 and the anchor pipe repair section 5.

[0069] In this embodiment, since the anchor pipe repair section 5 needs to be installed after actual measurement and cutting, the third flange 51 is in a state where it can move relative to the anchor pipe repair section 5 before being connected to the first flange 31. After the actual measurement and cutting of the anchor pipe repair section 5, the position of the third flange 51 needs to be adjusted. After the first flange 31 and the third flange 51 are tightened with bolts, the third flange 51 and the anchor pipe repair section 5 are welded and fixed.

[0070] Optionally, the connecting surfaces of the first flange 31, the second flange 41, the third flange 51, and the fourth flange 52 are machined before installation to improve the flatness and connection accuracy of the connecting surfaces.

[0071] In this embodiment, before installation, the connecting surfaces of the first flange 31, the second flange 41, the third flange 51, and the fourth flange 52 need to be machined respectively, which can not only improve the flatness of the connecting surfaces, but also ensure the connection accuracy between the first flange 31 and the third flange 51, and between the second flange 41 and the fourth flange 52.

[0072] Optionally, at least eight connection holes are spaced apart on the first flange 31 and the second flange 41.

[0073] In this embodiment, at least eight connection holes are respectively spaced apart on the first flange 31 and the second flange 41. The number of connection holes on the corresponding third flange 51 and fourth flange 52 is the same as that on the first flange 31 and the second flange 41. Through the above arrangement, the butt joint sealing performance between the first flange 31 and the third flange 51, and between the second flange 41 and the fourth flange 52 can be improved, preventing leakage at the butt joint of the segmented anchor pipe 3 on the nth segment and the segmented anchor pipe 4 on the (n + 1)th segment of the anchor pipe filling section 5.

[0074] Optionally, before erecting the nth segment of the steel tower, the construction method of the cross-segment anchor pipe further includes:

[0075] Machining the two end faces of the anchor pipe filling section 5 to improve the flatness and connection accuracy of the end faces.

[0076] In this embodiment, before installing the anchor pipe filling section 5, it is necessary to machine the two end faces of the anchor pipe filling section 5, which can not only improve the flatness of the two end faces of the anchor pipe filling section 5, but also improve the connection accuracy between the segmented anchor pipe 3 on the nth segment and the segmented anchor pipe 4 on the (n + 1)th segment of the anchor pipe filling section 5.

[0077] The terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature.

[0078] Although the present invention is disclosed as above, the protection scope of the present invention is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications will all fall within the protection scope of the present invention.

Claims

1. A construction method for cross - segment anchor pipes, characterized in that, Including: Correspondingly installing each section of the segmented anchor pipe on different segments of the steel tower at the factory; Erecting the nth segment of the steel tower; Erecting the (n + 1)th segment of the steel tower; Sealing and connecting the anchor pipe patch section between the segmented anchor pipe on the nth segment of the steel tower and the segmented anchor pipe on the (n + 1)th segment of the steel tower; Before erecting the nth segment of the steel tower, the construction method of the cross-segment anchor pipe further includes: Installing a first flange at the end of the segmented anchor pipe on the nth segment of the steel tower close to the segmented anchor pipe on the (n + 1)th segment of the steel tower; Installing a second flange at the end of the segmented anchor pipe on the (n + 1)th segment of the steel tower close to the segmented anchor pipe on the nth segment of the steel tower; Before erecting the nth segment of the steel tower, the construction method of the cross-segment anchor pipe further includes: Providing a third flange at one end of the anchor pipe patch section for mating connection with the first flange, and the third flange is fixedly installed after actually measuring and cutting the anchor pipe patch section on-site, and the cut end of the anchor pipe patch section is the end close to the third flange; Providing a fourth flange at the other end of the anchor pipe patch section for mating connection with the second flange, and the fourth flange is fixedly installed at the factory; The actual measurement and cutting includes: Measuring the distance between the segmented anchor pipe on the nth segment of the steel tower and the segmented anchor pipe on the (n + 1)th segment of the steel tower, and cutting the anchor pipe patch section according to the actually measured distance.

2. The construction method of the cross-segment anchor pipe according to claim 1, characterized in that, The sealing and connecting the anchor pipe patch section between the segmented anchor pipe on the nth segment of the steel tower and the segmented anchor pipe on the (n + 1)th segment of the steel tower includes: Installing a sealing ring between the second flange and the fourth flange, and tightening the second flange and the fourth flange with bolts.

3. The construction method of the cross-segment anchor pipe according to claim 1, characterized in that, The sealing and connecting the anchor pipe patch section between the segmented anchor pipe on the nth segment of the steel tower and the segmented anchor pipe on the (n + 1)th segment of the steel tower includes: Installing a sealing ring between the first flange and the third flange, and tightening the first flange and the third flange with bolts.

4. The construction method of the cross-segment anchor pipe according to claim 3, characterized in that, After installing the sealing ring between the first flange and the third flange and tightening the first flange and the third flange with bolts, the construction method of the cross-segment anchor pipe further includes: Welding and fixing the third flange and the anchor pipe patch section.

5. The construction method of the cross-segment anchor pipe according to claim 1, characterized in that, Before installation, the connection surfaces of the first flange, the second flange, the third flange and the fourth flange are respectively machined to improve the flatness and connection accuracy of the connection surfaces.

6. The construction method of the cross-segment anchor pipe according to claim 1, characterized in that, At least eight connection holes are spaced apart on the first flange and the second flange.

7. The construction method of the cross-segment anchor pipe according to claim 1, characterized in that, Before erecting the nth segment of the steel tower, the construction method of the cross-segment anchor pipe further includes: Machining the two end faces of the anchor pipe patch section to improve the flatness and connection accuracy of the end faces.

Images