CN106544959A - The construction method of the lifting sections of the king-tower containing saddle and bridge main tower saddle - Google Patents

Abstract

The present invention relates to the field of bridge construction, and relates to a main tower hoisting segment containing a saddle. The hoisting segment includes a rigid frame and multiple groups of saddles fixed in the rigid frame. Two groups of adjacent saddles are arranged in a scissors-like crossing, and the upper and lower saddles are arranged in parallel and at intervals. Each group of saddles includes an anchor body and a cable guide, and the anchor body and the cable guide are directly connected to each other. It also relates to a construction method of a bridge main tower saddle, comprising the following steps: Step 1: assembling multiple sets of saddles, each set of saddles is composed of an anchor body and a cable guide; Step 2: multiple sets of saddles and The rigid frame is assembled into a hoisting section, and the relative position of each group of saddles in the hoisting section is adjusted to the design standard. The assembled hoisting section is at least one; Step 3: Lift the hoisting section and install it on the main tower fixed. The invention can reduce the difficulty of high-altitude construction of the saddle, speed up the construction progress, and transform high-altitude operations into ground operations.

Description

Construction method for hoisting section of main tower containing saddle and bridge main tower saddle

technical field

The invention relates to the field of bridge construction, in particular to a main tower hoisting segment containing a saddle and a construction method for the bridge main tower saddle.

Background technique

The saddle in the anchorage area of the main tower is generally composed of an anchor body and a cable guide. Compared with the traditional cable guide form, this combination can convert the pulling force of the stay cable on the main tower into the tension of the anchor body on the concrete surface of the main tower. surface load, so that the force of the main tower is more reasonable. The characteristics of the saddle in the combination form of the anchor body and the cable guide are that the structural system composed of each group of the anchor body and the cable guide is staggered on the upper and lower layers, and the inside and outside are staggered, and the spatial positions of the anchor body and the cable guide are complicated. Therefore, when carrying out the saddle construction of this combined form, it is difficult to locate the space, and it is necessary to work at high altitudes to assemble the anchor body and the cable guide, which is difficult and risky.

Contents of the invention

Aiming at the defects existing in the prior art, the object of the present invention is to provide a main tower hoisting segment containing a saddle and a construction method for a bridge main tower saddle, which can reduce the difficulty of high-altitude construction of the saddle and speed up the construction at the same time schedule.

In order to achieve the above object, the technical solution adopted by the present invention is: comprising a rigid frame and multiple groups of saddles fixed in the rigid frame, and the left and right groups of adjacent saddles in the multiple groups of saddles are arranged crosswise , the upper and lower saddles are arranged in parallel and at intervals, each set of saddles includes an anchor body and a cable guide, and the anchor body and the cable guide are directly connected to each other, and the saddles are double-layer corotating saddles.

On the basis of the above technical solution, the anchor body and the cable guide are connected through a flange.

On the basis of the above technical solution, the stiff skeleton is a frame structure, and includes a plurality of horizontally and vertically vertically arranged steel beams.

The present invention also provides a construction method for the bridge main tower saddle,

On the basis of the above technical solution, the saddle is a double-layer co-rotating saddle, comprising the following steps:

Step 1: Assembling multiple sets of saddles, each set of saddles is composed of an anchor body and a cable guide;

Step 2: Multiple sets of saddles and rigid frames are assembled into a hoisting segment;

Step 3: Lift the hoisting segment to install and fix it on the main tower.

On the basis of the above technical solution, the first step is: select the assembly site, and assemble the anchor body and the cable guide to form multiple sets of saddles, and each set of saddles is directly opposite to each other by an anchor body and a cable guide Connected composition.

On the basis of the above technical solution, the anchor body is connected to the cable guide through a flange.

On the basis of the above technical solution, the assembly site is also provided with an assembly platform (5), and the assembly of the anchor body and the cable guide, as well as the assembly of the saddle and the rigid frame are all completed on the assembly platform.

On the basis of the above technical solution, the second step is specifically:

The rigid frame and multiple groups of saddles are pre-assembled into at least one hoisting segment, and the position of each group of saddles in the hoisting segment is adjusted to the preset position. After the adjustment, the saddle and the rigid frame are fixed, and the left and right Two groups of adjacent saddles are arranged crosswise, and the upper and lower saddles are arranged in parallel and at intervals.

On the basis of the above technical scheme, a three-way jack is used to adjust the relative position of each group of saddles in the hoisting segment.

Compared with the prior art, the present invention has the advantages that: the assembly of the saddle and the hoisting segment is completed on the ground, and the complicated high-altitude positioning and installation of the saddle is transformed into the bottom surface operation, which greatly reduces the difficulty of construction and at the same time Improved working precision.

Description of drawings

Fig. 1 is the structural representation of saddle;

Fig. 2 is a structural schematic diagram when the hoisting segments are assembled;

Fig. 3 is a structural schematic diagram of the hoisting segment.

In the figure: 1-anchor body, 2-cable conduit, 3-rigid skeleton, 4-three-way jack, 5-assembly platform.

detailed description

The present invention will be described in further detail below in conjunction with the accompanying drawings.

The present invention provides a main tower hoisting section containing a saddle. In this embodiment, the saddle is a double-layer corotating saddle. As shown in Figure 3, the hoisting section includes a rigid skeleton 3 in a frame structure And multiple sets of saddles fixed in the rigid frame 3, the rigid frame 3 is welded by multiple steel beams arranged horizontally and vertically, and the left and right groups of adjacent saddles in the saddle form a scissors The upper and lower saddles are arranged in parallel and at intervals. Each set of saddles includes an anchor body 1 and a cable guide 2, as shown in Figure 1, and the anchor body 1 and the cable guide 2 are directly connected by flanges. .

The invention provides a construction method of a bridge main tower saddle, the saddle is a double-layer co-rotating saddle, and the construction method specifically includes the following steps:

Step 1: Set up an assembly site near the bridge. The setting of the assembly site should meet the requirements of the operating space during assembly and the hoisting space during hoisting, and an assembly platform 5 is set on the assembly site, and the anchor body 1 is carried out on the assembly platform 5. The assembly with the cable guide 2 forms multiple sets of saddles, each set of saddles is composed of an anchor body 1 and a cable guide 2 facing each other, and the anchor body 1 and the cable guide 2 are connected by a flange.

Step 2: As shown in Figure 2, pre-assemble the rigid frame 3 and multiple sets of saddles on the assembly platform 5 into a hoisting segment, the position between the saddles in the rigid frame 3 satisfies: two groups of adjacent saddles on the left and right The saddles are arranged in a scissors-like cross, and the upper and lower saddles are arranged in parallel and at intervals. Three-way jack 4 is used to adjust the relative position of each set of saddles in the hoisting segment. We can also set a coordinate system in the assembly site to facilitate the adjustment of the relative position of each set of saddles. The hoisting segment to be adjusted After the position of each group of saddles reaches the preset position, as shown in Figure 3, the saddle and the rigid frame 3 are fixed by welding or other means. There is at least one hoisting section assembled, and the bridges have different sizes and specifications, so the number of hoisting sections required is also different, and the preset positions of each set of saddles are also different. The preset position of each group of saddles is designed when the bridge is being designed, specifically including the specific positions of the saddles on the rigid frame 3, and the space distance between the left, right and upper and lower saddles.

Step 3: Hoist the hoisting segments to the main tower in turn by using lifting equipment, and fix between adjacent hoisting segments. Because the angles of the stay cables are distributed in a fan shape, the angle between the stay cables below the anchorage area of the main tower and the horizontal plane is relatively large, and the length of the corresponding cable guide 2 is also relatively long. During the process of hoisting to the main tower, the The deformation of the cable guide 2 is relatively large. If the cable guide 2 and the anchor body 1 are hoisted as a whole at the same time, it is necessary to adjust the outlet of the cable guide 2 after the hoisting is in place. At this time, the cable guide 2 in this area is processed in a post-connection manner, that is, after the saddle and the rigid frame 3 are accurately hoisted and positioned, the cable guide is installed in a fast docking manner.

In the above-mentioned construction method, the assembly of the saddle and the hoisting segment is completed on the ground, and the high-altitude positioning of the complex saddle is transformed into ground work, which greatly reduces the construction difficulty and improves the operation accuracy at the same time.

The present invention is not limited to the above-mentioned embodiments. For those of ordinary skill in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, and these improvements and modifications are also considered protection of the present invention. within range. The content not described in detail in this specification belongs to the prior art known to those skilled in the art.

Claims (9)

1. A main tower hoisting segment containing a saddle, characterized in that: comprise a rigid framework (3) and multiple groups of saddles fixed in the rigid framework (3), among the multiple groups of saddles The left and right groups of adjacent saddles are arranged crosswise, and the upper and lower saddles are arranged in parallel and at intervals. Each group of saddles includes an anchor body (1) and a cable guide (2), and the anchor body (1) and the cable guide (2) are directly opposite to each other, and the saddle is a double-layer corotating saddle. 2. A main tower hoisting segment including a saddle according to claim 1, characterized in that: the anchor body (1) and the cable guide (2) are connected by a flange. 3. A main tower hoisting segment containing a saddle as claimed in claim 1, characterized in that: the stiff skeleton (3) is a frame structure, and includes a plurality of horizontally and vertically vertically arranged steel beams . 4. A construction method for a bridge main tower saddle, characterized in that: said saddle is a double-layer corotating saddle, comprising the following steps: Step 1: Assembling multiple sets of saddles, each set of saddles consists of an anchor body (1) and a cable guide (2); Step 2: multiple groups of saddles and rigid frames (3) are assembled into a hoisting section; Step 3: Lift the hoisting segment to install and fix it on the main tower. 5. the construction method of a kind of bridge main tower saddle as claimed in claim 4, is characterized in that, described step one is specifically: select assembling site, and carry out the assembling of anchor body (1) and cable conduit (2) Multiple sets of saddles are formed, and each set of saddles is composed of an anchor body (1) and a cable guide (2) facing each other. 6. The construction method of a bridge main tower saddle as claimed in claim 5, characterized in that, the anchor body (1) is connected to the cable conduit (2) through a flange. 7. the construction method of a kind of bridge main tower saddle as claimed in claim 5, is characterized in that: described assembling site is also provided with assembling platform (5), the assembling of anchor body (1) and cable conduit (2) And the assembly of the saddle and the rigid frame (3) is all completed on the assembly platform (5). 8. the construction method of a kind of bridge main tower saddle as claimed in claim 4, is characterized in that, described step 2 is specifically: The rigid framework (3) is pre-assembled with multiple groups of saddles into at least one hoisting section, and the position of each group of saddles in the hoisting section is adjusted to a preset position. After the adjustment, the saddle and the rigid framework (3 ) are fixed, and the left and right groups of adjacent saddles are arranged crosswise, and the upper and lower saddles are arranged in parallel and at intervals. 9. the construction method of a kind of bridge main tower saddle as claimed in claim 8 is characterized in that: adopt three-way jack (4) to adjust the relative position between each group of saddles in the hoisting segment.