Single stay tensing construction method and apparatus for parallel twisted steel stay system

A technology of parallel steel strands and construction methods, which is applied in the direction of foundation structure engineering, construction, sheet pile walls, etc., and can solve the unavoidable and repeated clamping of steel strands, the unfavorable uniformity control of steel strands, and the large space occupied by jacks To achieve the effect of improving work efficiency and economic benefits, ensuring anchoring efficiency and good anchoring effect

Inactive Publication Date: 2003-11-26
LIUZHOU OVM MASCH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When this process encounters long cables, the working clips will inevitably repeatedly clamp the steel strands. On the one hand, the clips and steel strands will be damaged to varying degrees; Chips and other fall off and accumulate in the gap between the teeth of the clip, affecting the anchoring effect
[0003] Secondly, the control of the dispersion (uniformity) of the single tension cable force of the parallel steel strand cable system is a key point of the parallel steel strand cable system. Construction, the method is to install a sensor on the first steel strand, and use the sensor change value to control the tension of other steel strands. Large, the multiple steel strands around the sensor cannot be stretched, only after the sensor is removed, it can be stretched, which i

Method used

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  • Single stay tensing construction method and apparatus for parallel twisted steel stay system
  • Single stay tensing construction method and apparatus for parallel twisted steel stay system
  • Single stay tensing construction method and apparatus for parallel twisted steel stay system

Examples

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Effect test

Embodiment

[0031] A single-root construction method for a parallel steel strand cable system. In the single-root tension construction, a support for tension and top pressure is used. The main process includes:

[0032] A: Single tension construction:

[0033] a. Fix the support to the anchor,

[0034] b. Carry out single steel strand threading and anchor with temporary clips,

[0035] c. Install a single tension jack and continuous tension components on the support,

[0036] d. Use the space inside the support to install the sensor on the anchorage,

[0037] e. Use a single tension jack and two sets of tool anchors on the continuous tension parts to repeatedly anchor the steel strands,

[0038] f. When the tension reaches the design tension, replace the formal work clamp to anchor the steel strand at one time;

[0039] B. Pushing the steel strands one by one: use the support for tensioning and pressing as the reaction force frame, so that the clips and the steel strands are jacked up...

Embodiment 2

[0041] A device used in the single tension construction method of a parallel steel strand cable system-a support specially used for tension and top pressure of steel strand tension, such as figure 1 As shown, the support is composed of a connecting ring 1, a column 2, a tensioning top plate 3, a pressure bearing ring 4, and a limit ring 5. There are 3 to 6 columns in the column 2, with 4 being the best. The ring 1 and the pressure bearing ring 4 are respectively located at both ends of the column 2 and are connected into one body through the column 2. The limit ring 5 is fixed on the column 2 through nuts. The tension top pressure plate 3 is a tensile pressure plate 3, The tension bearing plate 3 is embedded in the spigot of the pressure bearing ring 4 and fixed with screws. The number of round holes corresponding to the holes of the anchor plate is drilled on it, and the circular connecting ring 1 is provided with internal threads. The top pressure support is connected with t...

Embodiment 3

[0043] A device used in a single tensioning construction method of a parallel steel strand cable system——a tensioning and top-pressing support dedicated to the steel strand top pressure. Its basic structure is the same as that of Embodiment 2, except that: The tension top plate 3 in the support for tension and top pressure is two symmetrical diaphragms 12, and each diaphragm has two rows of semicircular holes with the same number and the same position (see figure 1 , Figure 4, Figure 5).

[0044] As a modification of the various embodiments of the present invention, the coupling ring 1 can be made into a "flange" type with screw holes on it, and is connected with the anchor pad or anchor with bolts (see Figure 6).

[0045] How to install and use:

[0046] During the single tension construction, connect the connecting ring 1 of the tension and top pressure support with the anchor, insert the corresponding tension bearing plate into the seam, and adjust the hole position to cor...

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PUM

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Abstract

The construction process includes one single stay tensing step, in which tensing and push pressing seat, jack on the seat, continuous tensing part and tool anchor are used to tense to the designed tension before changing into working clamp sheet, tightening with tightener and once anchoring; and one push pressing step, in which tensing and pushing seat is used as backward force applying frame forthe synchronous pushing forward of the clamping sheet and the twisted steel stay. The tensing and pushing seat consists of 3-6 uprights, connecting rings, tensing and pushing board, pressure bearingring and limiting ring. The said construction method can avoid repeated tensing to result in inevitable hidden fault in anchoring and clamping quality and raise clamping effect and anchoring quality.

Description

1. Technical field: [0001] The invention relates to a construction method of a parallel steel strand cable system and an auxiliary tool used therein—a support for tensioning and pressing. 2. Background technology: [0002] The parallel steel strand cable system is a system in which the steel strand is used as the load-bearing cable body, based on the group anchor technology, and the group anchor clamp is used to bear the static and dynamic load of the structure transmitted by the cable. Steel strand stay cable system generally works at 0.30R b ~0.45R b Low stress area, sometimes only 0.1R during the construction phase b , so the anchoring efficiency of the anchor clamp is the key to ensure the normal operation of the steel strand cable in a low stress state. Parallel steel strand cable-stayed cables are generally produced and installed on site. In the process, the steel strands pass through the anchorage one by one, tensioned and pre-tensioned, and the initial stress is e...

Claims

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Application Information

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IPC IPC(8): E02D5/74
Inventor 孙长军李冬平汪孝龙韦福堂唐明翰韦壮科黎兆亮
Owner LIUZHOU OVM MASCH CO LTD
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