Construction device and method for hoisting a steel box arch bridge by using two-hanging-one-locking method

Abstract

The application discloses a two-hanging-one-fastening method hoisting construction device and method for an outward-inclined steel box arch bridge, which comprises an arch rib, an arch foot pre-buried section, a hoisting assembly, a temporary fixing assembly and a construction method. The hoisting assembly comprises a bearing cable, a cable tower, a main cable anchor, a cable tower foundation, a cable tower wind catching cable and a cable tower wind catching cable anchor. The temporary fixing assembly comprises a fastening cable, a wind catching cable, a temporary cross brace, a fastening cable anchor and a wind catching ground anchor. The construction method comprises the following steps: installing a fastening cable steel anchor box and hoisting the arch rib; installing the temporary cross brace; releasing the fastening cable; recycling the fastening cable; releasing the wind catching cable; and recycling the wind catching cable. The application has the effects of the traditional fastening cable and wind catching cable, can reduce material and manpower input, speeds up the construction turnover speed, shortens the construction period, is the development trend of the fastening cable and wind catching cable construction in cable hoisting, is convenient to popularize and has remarkable application effects.

Description

Technical Field

[0001] This invention relates to the field of construction of outward-sloping steel box arch bridges, and in particular to a construction device and method for hoisting outward-sloping steel box arch bridges using the cross-cable two-hanging-one-clip method. Background Technology

[0002] With the rapid development of arch bridge construction technology in my country, the requirements for the practicality and aesthetics of bridges are increasing. Outward-sloping arch bridges, due to their beautiful appearance and novel design, are widely adopted by design units. Cable-stayed installation is commonly used in the construction of these bridges. In the past, during the assembly of outward-sloping steel box arch bridges, each segment was temporarily fixed with one set of cable ties and one set of guy wires after it was in place. This resulted in a large consumption of cable ties and guy wires, and because the length of each cable bundle varied, the recycling rate was almost zero. The current method uses a two-hook, one-buckle construction method, changing the original one set of cable ties and one set of guy wires per segment to one set of temporary cable ties, one set of permanent cable ties, one set of temporary guy wires, and one set of permanent guy wires every two segments. The temporary cable ties and temporary guy wires are removed after the next segment is installed, with each two segments forming one set. This solves the problems of wasted cable ties and guy wires and low recycling rate, while also saving on the number of corresponding back cables and ground anchors. Summary of the Invention

[0003] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0004] In view of the problems existing in the prior art, the present invention is proposed.

[0005] Therefore, the technical problem to be solved by the present invention is that in the existing cable hoisting construction, there is a set of ties and a set of wind bracing for each arch section, and the ties and wind bracing are mostly disposable materials with serious waste and low recyclability. The amount of work for ties and wind bracing is large, which increases the processing and manufacturing time and is not conducive to saving the construction period.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a method for hoisting and constructing an outward-sloping steel box arch bridge using a two-hanging-one-locking method with cross-cables, comprising:

[0007] Install the cable-stayed steel anchor box and hoist the arch rib;

[0008] Install temporary cross bracing;

[0009] Place a rope;

[0010] Reuse the buckle;

[0011] Release Zhang Lanfeng;

[0012] The wind turbine can be reused.

[0013] As a preferred embodiment of the cross-cable two-hanging-one-cable hoisting construction method for the outward-inclined steel box arch bridge described in this invention, the method involves: hoisting the first two arch ribs (upstream and downstream) in the order of installing one arch rib segment, tensioning one cable segment, and installing one wind bracing segment; installing temporary cross bracing on the second arch rib segments (upstream and downstream); tensioning the second cable segment; installing temporary cross bracing on the third arch rib segments (upstream and downstream); tensioning the third cable segment after installation; and releasing the tension on the second cable segment.

[0014] As a preferred embodiment of the cross-cable two-hanging-one-cable hoisting construction method for the outward-sloping steel box arch bridge described in this invention, the following steps are taken: after the fourth arch rib is installed, the second segment cable is directly transferred to the fourth arch rib, and the second segment cable tie is installed to the fourth arch rib. After the fifth segment is installed, the fourth segment temporary cable tie is released. After the sixth segment is constructed, the fourth segment cable tie is installed to the sixth segment, and the sixth segment is transferred to the eighth segment in sequence.

[0015] As a preferred embodiment of the cross-cable two-hanging-one-cable hoisting construction method for the outward-inclined steel box arch bridge described in this invention, the following steps are taken: after the fifth arch rib is installed, the fourth section of the joists is released; after the seventh arch rib is installed, the fourth section of the joists is transferred to the sixth section of the joists; and the sixth section of the joists is transferred to the eighth section in sequence. The joists and joists are retained until the arch bridge is closed.

[0016] This invention also provides the following technical solution: a two-hanging-one-locking hoisting construction device for cross-cable of outward-sloping steel box arch bridges, comprising:

[0017] Arch ribs;

[0018] Arch foot embedded section;

[0019] The lifting assembly includes a load-bearing cable, a tower, a main cable anchor, a tower foundation, a tower wind-staying cable, and a tower wind-staying cable anchor. The tower is set on the construction ground via the tower foundation. The load-bearing cable is connected to the tower and is connected to the construction ground via the main cable anchor. One end of the tower wind-staying cable is connected to the tower, and the other end is connected to the construction ground via the tower wind-staying cable anchor.

[0020] A temporary fixing assembly is provided on one side of the lifting assembly and includes a cable, a wind brace, a temporary cross brace, a cable anchor, and a wind brace ground anchor. One end of the cable is connected to the arch rib, the temporary cross brace is connected to the arch rib, the cable anchor is provided on the construction ground and connected to the cable, and the wind brace ground anchor is connected to the wind brace.

[0021] As a preferred embodiment of the cross-cable two-hanging-one-clip hoisting construction device for the outward-inclined steel box arch bridge described in this invention, the load-bearing cable is mainly used to adjust the installation position of the arch rib when hoisting it, and the load-bearing cable is set both upstream and downstream of the arch bridge.

[0022] As a preferred embodiment of the cross-cable two-hanging-one-clamping method hoisting construction device for the outward-inclined steel box arch bridge described in this invention, the tower wind-holding cable is mainly used to maintain the temporary stability of the tower and hoisting components before closure during use, and the tower wind-holding cable is set at the upstream and downstream of the tower, and the wind-holding cable is mainly used to counteract the lateral horizontal force.

[0023] As a preferred embodiment of the cross-cable two-hanging-one-cable hoisting construction device for the outward-inclined steel box arch bridge described in this invention, wherein: the cable is connected to the arch rib via a connecting component, the connecting component including an arch rib cable anchor point, a steel strand connector, and a steel strand fixed end anchor, the arch rib cable anchor point is connected to the arch rib, the steel strand fixed end anchor is connected to the arch rib cable anchor point, and the steel strand connector is connected to the steel strand fixed end anchor.

[0024] As a preferred embodiment of the cross-cable two-hanging-one-cable hoisting construction device for the outward-inclined steel box arch bridge described in this invention, wherein: one end of the cable is connected to the cable anchor via a cable steel anchor box, and the cable is connected to the cable steel anchor box via anchor clamps and tension end anchors.

[0025] As a preferred embodiment of the cross-cable two-hanging-one-clamping hoisting construction device for the outward-inclined steel box arch bridge described in this invention, the temporary cross bracing is mainly used to increase the stability of the upstream and downstream arch ribs, connecting the upstream and downstream arch ribs as a whole, and will be completely removed after the closure.

[0026] The beneficial effects of this invention are: it has the effects of traditional cable ties and wind bracing, while reducing the input of materials and manpower, accelerating the construction turnover speed, and shortening the construction cycle. It is the development trend of cable ties and wind bracing construction in cable hoisting, easy to promote, and has significant application effects. Attached Figure Description

[0027] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0028] Figure 1 This is a construction elevation view of the present invention.

[0029] Figure 2 This is a construction plan view of the present invention.

[0030] Figure 3 This is a construction plan view of the first segment of the arch rib of the present invention.

[0031] Figure 4 This is a schematic diagram of the buckle connection of the present invention.

[0032] Figure 5 This is a schematic diagram of the anchor point of the sling in this invention.

[0033] Figure 6 This is a schematic cross-sectional view of the anchor point of the sling in this invention.

[0034] Figure 7 This is a schematic diagram of the cable anchor connection of the present invention.

[0035] Figure 8 This is an elevation view of the cable anchor box structure of the present invention. Detailed Implementation

[0036] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0037] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0038] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0039] Example 1

[0040] Reference Figures 1-3 This is the first embodiment of the present invention, which provides a method for hoisting and constructing an outward-sloping steel box arch bridge using a two-hanging-one-locking method with cross-cables. The method is characterized by including:

[0041] Install the cable-stayed steel anchor box and hoist the arch rib;

[0042] Install temporary cross bracing;

[0043] Place a rope;

[0044] Reuse the buckle;

[0045] Release Zhang Lanfeng;

[0046] The wind turbine can be reused.

[0047] After the cable crane is installed, the wind anchor is poured, the cable anchor box is installed, and the cable is connected to the cable anchor through the cable anchor box. After the first section of the upstream arch rib is installed to the accurate position by the cable crane, the first section of the upstream cable is installed. The first section of the upstream cable is tensioned at the position of the cable anchor box. At the same time, the first section of the upstream wind anchor is installed. After the first section of the downstream arch rib is installed, the first section of the downstream cable is installed. The first section of the downstream cable is tensioned at the position of the cable anchor box and the first section of the downstream wind anchor is installed. The first two sections of the upstream and downstream arch ribs are hoisted in the order of installing one section of arch rib, tensioning one section of cable, and installing one section of wind anchor. After the temporary cross bracing is installed on the second section of the upstream and downstream arch ribs, the second section of cable is tensioned. Temporary cross bracing is installed on the third section of the upstream and downstream arch ribs. After the installation is completed, the third section of cable is tensioned. After the tensioning is completed, the second section of cable is released.

[0048] After the fourth arch rib is installed, the second segment's tie cable is directly transferred to the fourth arch rib, and the second segment's windlass is installed to the fourth arch rib. After the fifth segment is installed, the fourth segment's temporary tie cable is released. After the sixth segment is completed, the fourth segment's tie cable is installed to the sixth segment, and so on, transferring the sixth segment to the eighth segment.

[0049] After the fifth arch rib is installed, the fourth section of the tie rod is released. After the seventh arch rib is installed, the fourth section of the tie rod is moved to the sixth section of the tie rod. The sixth section of the tie rod is then moved to the eighth section in sequence. The tie rod and tie rod are retained until the arch bridge is closed.

[0050] In summary, the two-hanging-one-buckle method for constructing the cable ties and wind bracing saves on the number of cable ties and wind bracing works because one set of cable ties and wind bracing is in a state of continuous use, and also reduces the number of corresponding cable anchor boxes and ground anchors. Regarding the installation path of the cable ties and wind bracing, since one set of cable ties remains on the arch rib and only rotates within a short distance, the time spent on this process is reduced, which helps to speed up the construction progress.

[0051] Example 2

[0052] Reference Figures 1 to 8 This is the second embodiment of the present invention. This embodiment is based on the previous embodiment, but the difference is that it provides a two-hanging-one-locking hoisting construction device for the cross-cable of the outward-inclined steel box arch bridge, including the arch rib G, the arch foot embedded section D, the lifting component 100, and the temporary fixing component 200.

[0053] Specifically, the lifting assembly 100 includes a load-bearing cable 101, a tower 102, a main cable anchor 103, a tower foundation 104, a tower wind-staying cable 105, and a tower wind-staying cable anchor 106. The tower 102 is set on the construction ground through the tower foundation 104. The load-bearing cable 101 is connected to the tower 102 and is connected to the construction ground through the main cable anchor 103. One end of the tower wind-staying cable 105 is connected to the tower 102, and the other end is connected to the construction ground through the tower wind-staying cable anchor 106.

[0054] Furthermore, a temporary fixing component 200 is installed on one side of the lifting component 100, including a cable 201, a wind brace 202, a temporary cross brace 203, a cable anchor 204, and a wind brace ground anchor 205. One end of the cable 201 is connected to the arch rib G, the temporary cross brace 203 is connected to the arch rib G, the cable anchor 204 is installed on the construction ground and connected to the cable 201, and the wind brace ground anchor 205 is connected to the wind brace 202.

[0055] It should be noted that the load-bearing cable 101 is mainly used to adjust the installation position of the arch rib G when hoisting it. The load-bearing cable 101 is installed both upstream and downstream of the arch bridge. The tower wind-holding cable 105 is mainly used to maintain the temporary stability of the tower 102 and the hoisting components before the closure of the tower. The tower wind-holding cable 105 is installed upstream and downstream of the tower 102. The wind-holding cable 202 is mainly used to counteract the lateral horizontal force.

[0056] The cable 201 is connected to the arch rib G via a connecting member 201a. The connecting member 201a includes an arch rib cable anchor 201a-1, a steel strand connector 201a-2, and a steel strand fixed end P anchor 201a-3. The arch rib cable anchor 201a-1 is connected to the arch rib G, the steel strand fixed end P anchor 201a-3 is connected to the arch rib cable anchor 201a-1, and the steel strand connector 201a-2 is connected to the steel strand fixed end P anchor 201a-3.

[0057] One end of the cable 201 is connected to the cable anchor 204 via the cable steel anchor box 201b. The cable 201 is connected to the cable steel anchor box 201b via the anchor clamp 201b-1 and the tensioning end anchor 201b-2.

[0058] Temporary cross bracing 203 is mainly used to increase the stability of the upstream and downstream arch ribs G, connecting the upstream and downstream arch ribs G as a whole, and will be completely removed after the closure.

[0059] In summary, the arch rib G is hoisted to the designated installation position using the lifting assembly 100, the sling 201 is connected to the arch rib G using the connecting component 201a, and the arch rib G is temporarily supported using the temporary fixing assembly 200, thus completing the hoisting of the entire outward-sloping arch bridge.

[0060] Example 3

[0061] Reference Figures 1-3 This is the third embodiment of the present invention. This embodiment is based on the previous embodiment. The difference is that, according to the actual application on site, the traditional cable-stayed and wind-supported installation method is compared with the two-hanging-one-clip method. The bridge is an asymmetrical outward-leaning steel arch bridge with a total of 34 segments on the upstream and downstream sides of the arch rib. Except for the closure section, there are 8 segments on the upstream and downstream sides of the arch rib on each side.

[0062] The following table shows the required length and number of cable ties for each segment, calculated using traditional cable ties installation methods:

[0063]

[0064] The required length of wind-guiding cable for each arch rib segment is shown in the table below;

[0065]

[0066] The above calculations show that the required length of the steel strand for the anchor cable is 14,770m, and the required length for the wind-catching cable is 1,096m. As shown in the table below, a single anchor box can be equipped with 3 sets of anchor cables (6 bundles), and each bank has 16 sets of anchor cables (32 bundles). 6 anchor boxes are needed on each bank, for a total of 12 anchor boxes on both banks.

[0067] The following table shows the required length and number of cables for each segment, calculated using the two-clip-one-hook cable installation method:

[0068]

[0069] The required length of wind-guiding cable for each arch rib segment is shown in the table below;

[0070] length 18 26 37 47 53

[0071] The above calculations show that the required length of the steel strand for the anchor cable is 11,950m, and the required length for the wind-catching cable is 724m. As shown in the figure above, a single anchor box can be equipped with 3 sets of anchor cables (6 bundles), and each bank has 10 sets of anchor cables (20 bundles). Each bank requires 4 anchor boxes, for a total of 8 anchor boxes on both banks.

[0072] The above comparison shows that using the two-hanging-one-clip method for cable fastening can save 2820m of cable strand, 372m of guy wire, and 4 cable anchor boxes. Practical field application has demonstrated that this two-hanging-one-clip method is feasible, reduces construction organization difficulty, saves materials and manpower, accelerates construction turnover, shortens the construction cycle, and improves construction quality and safety. It is simple to operate, efficient, easy to promote, and its application results are significant.

[0073] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A method for hoisting an outward-sloping steel box arch bridge using a two-hanging-one-locking method with cross-cables, characterized by: Install the cable-stayed steel anchor box and hoist the arch rib; Install temporary cross bracing; Place a rope; Reuse the buckle; Release Zhang Lanfeng; Recycle the wind; Following the sequence of installing one section of arch rib, tensioning one section of cable tie, and installing one section of wind bracing, the first two sections of arch ribs upstream and downstream are hoisted. After installing temporary cross bracing on the second section of arch ribs upstream and downstream, the cable tie of the second section is tensioned. Temporary cross bracing is installed on the third section of arch ribs upstream and downstream. After installation, the cable tie of the third section is tensioned. After tensioning, the cable tie of the second section is released. After the fourth arch rib is installed, the second segment cable is directly transferred to the fourth arch rib, and the second segment cable is installed to the fourth arch rib. After the fifth segment is installed, the fourth segment cable is released. After the sixth segment is completed, the fourth segment cable is installed to the sixth segment, and the sixth segment cable is transferred to the eighth segment in sequence. After the fifth arch rib is installed, the fourth arch rib is released. After the seventh arch rib is installed, the fourth arch rib is moved to the sixth arch rib. The sixth arch rib is then moved to the eighth arch rib. The cable-stayed bridge and the arch rib are kept in place until the arch bridge is closed.

2. A construction device for the cross-cable two-hanging-one-buckle hoisting method for outward-sloping steel box arch bridges, characterized in that: The method for hoisting and installing an outward-sloping steel box arch bridge using the two-hanging-one-locking method with cross-cables, as described in claim 1, is used to achieve this. Arch rib (G); Arch foot embedded section (D); The lifting assembly (100) includes a load-bearing cable (101), a tower (102), a main cable anchor (103), a tower foundation (104), a tower wind-holding cable (105), and a tower wind-holding cable anchor (106). The tower (102) is set on the construction ground through the tower foundation (104). The load-bearing cable (101) is connected to the tower (102), and the load-bearing cable (101) is connected to the construction ground through the main cable anchor (103). One end of the tower wind-holding cable (105) is connected to the tower (102), and the other end is connected to the construction ground through the tower wind-holding cable anchor (106). A temporary fixing assembly (200) is provided on one side of the lifting assembly (100) and includes a cable (201), a wind brace (202), a temporary cross brace (203), a cable anchor (204), and a wind brace ground anchor (205). One end of the cable (201) is connected to the arch rib (G), the temporary cross brace (203) is connected to the arch rib (G), the cable anchor (204) is provided on the construction ground and is connected to the cable (201), and the wind brace ground anchor (205) is connected to the wind brace (202).

3. The lifting and construction device for the outward-sloping steel box arch bridge using the two-hanging-one-buckle method with cross-cable as described in claim 2, characterized in that: The load-bearing cable (101) is mainly used to adjust the installation position of the arch rib (G) when hoisting it. The load-bearing cable (101) is installed both upstream and downstream of the arch bridge.

4. The lifting and construction device for the outward-sloping steel box arch bridge using the two-hanging-one-locking method with cross-cable as described in claim 3, characterized in that: The cable tower wind-catching cable (105) is mainly used to maintain the temporary stability of the cable tower (102) and the hoisting components before closure when the cable tower (102) is in use. The cable tower wind-catching cable (105) is set up upstream and downstream of the cable tower (102). The wind-catching cable (202) is mainly used to counteract the lateral horizontal force.

5. The lifting and construction device for the outward-sloping steel box arch bridge using the two-hanging-one-locking method with cross-cable as described in claim 4, characterized in that: The buckle (201) is connected to the arch rib (G) via a connecting member (201a). The connecting member (201a) includes an arch rib buckle anchor (201a-1), a steel strand connector (201a-2), and a steel strand fixed end P anchor (201a-3). The arch rib buckle anchor (201a-1) is connected to the arch rib (G), the steel strand fixed end P anchor (201a-3) is connected to the arch rib buckle anchor (201a-1), and the steel strand connector (201a-2) is connected to the steel strand fixed end P anchor (201a-3).

6. The lifting and construction device for the outward-sloping steel box arch bridge using the two-hanging-one-locking method with cross-cable as described in claim 5, characterized in that: One end of the cable (201) is connected to the cable anchor (204) through the cable steel anchor box (201b), and the cable (201) is connected to the cable steel anchor box (201b) through the anchor clamp (201b-1) and the tension end anchor (201b-2).

7. The lifting and construction device for the outward-sloping steel box arch bridge using the two-hanging-one-buckle method with cross-cable as described in claim 6, characterized in that: The temporary cross bracing (203) is mainly used to increase the stability of the upstream and downstream arch ribs (G), connecting the upstream and downstream arch ribs (G) as a whole, and will be completely removed after the closure.

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