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YUQIAO PRESTRESSED

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How a Through-Type Jack Works

How a Through-Type Jack Works

A through-type jack is a dual-action jack that uses two hydraulic cylinders—one for tensioning the prestressing tendons and the other for pressing against the anchorage device. This type of jack is ideal for tensioning systems with a central core. Here’s how it works: When tensioning the prestressing tendon, oil flows into the tension cylinder’s port while the pressure cylinder’s port returns oil. As a result, the pressure cylinder, connecting sleeve, and support sleeve move together to the right, firmly pressing against the anchor ring. Meanwhile, the tension cylinder, along with the end cap nut, plug, and through-type sleeve, moves as a single unit to the left, pulling the tool anchor and thereby tensioning the prestressing tendon. During the anchoring phase, while maintaining consistent tension force, oil is introduced into the pressure cylinder’s port. The pressure piston, protective sleeve, and pressure head then move together to the right, forcefully driving the wedge-shaped clamping mechanism deep into the anchor ring. At this point, the tensioning process is securely locked in place.

27

2019

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03

Congratulations on the launch of our company website—welcome to visit!

Congratulations on the launch of our company website—welcome to visit!

Liuzhou Yuqiao Prestressed Engineering Technology Co., Ltd. is a specialized enterprise integrating the research and development, production, sales, and engineering installation of prestressed system products, bridge expansion joints, and bridge rubber bearings. The company develops and manufactures a comprehensive range of products, including bridge expansion joints, rubber bearings, prestressed tensioning jacks, advanced CNC prestressing equipment (intelligent tensioning systems), ultra-high-pressure tensioning pumps, lifting jacks, pipe-jacking jacks, smart automatic continuous launching jacks, smart automatic continuous lifting jacks, ultra-thin flat dry jacks (for bearing replacement), intelligent pile tensioning equipment, front-anchored jacks, and precision-threaded steel bars.

27

2019

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03

The Impact of Reduced Pre-stressed Anchor Dimensions on Anchor Quality

The Impact of Reduced Pre-stressed Anchor Dimensions on Anchor Quality

In recent years, due to the impact of low-bid winning practices, anchorages have seen their prices decline annually—despite the continuous rise in steel costs. This has left manufacturers with no profit margin, and unfortunately, relevant authorities have yet to implement effective regulatory measures to protect them. As a result, many companies are resorting to cutting corners by reducing material quality. Currently, numerous manufacturers have already shortened the wedge length to 38–40 mm, while also decreasing the thickness, diameter, and hole spacing of the anchorages. Such cost-cutting measures inevitably compromise the overall quality of the products. Yet, every geometric dimension of the anchorage has been meticulously calculated and rigorously tested through countless trials—meaning these dimensions cannot be altered arbitrarily. Otherwise, the stable anchoring performance of the anchorage could be severely compromised. Moreover, both domestic and international experts have discovered that the high-strength steel strands used in the wedges play a critical role in ensuring the long-term reliability and safety of the system.

10

2019

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07

Wuhan, keep it up! China, you’ve got this! Liuzhou Yuqiao Prestressed is with you every step of the way.

Wuhan, keep it up! China, you’ve got this! Liuzhou Yuqiao Prestressed is with you every step of the way.

During this special time, Wuhan, keep it up! China, you’ve got this! Hang in there!

14

2020

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02

Speak your native language online—join the national initiative. Anchor links and Yiqiao URLs provide direct access to the official website.

Speak your native language online—join the national initiative. Anchor links and Yiqiao URLs provide direct access to the official website.

Surf the web in your native language—join the national initiative! Anchor links and "Yuqiao" URLs provide direct access to our official website. They’re easy to remember, simple to understand, and perfect for sharing with others.

24

2020

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04

Get to know electric oil pumps—introduction and usage of electric oil pumps

Get to know electric oil pumps—introduction and usage of electric oil pumps

An electric oil pump, also known as an electric hydraulic jack, is a device composed of a hydraulic cylinder and an electric pump station, enabling it to perform various tasks such as lifting, pushing, pulling, and squeezing.

27

2020

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05

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Liuzhou Yuqiao Prestressed Engineering Technology Co., Ltd.

Email:1193915742@qq.com

Address: No. 1 Fengcun Industrial Area, Silian Village, Jinde Town, Liujiang District, Liuzhou City

Phone:0772-3732260

Mobile phone:13978068222

Website address:https://www.yqyyl.cn/

Chinese web address: Yuqiao.Web, Anchorage.Web

Copyright: Liuzhou Yuqiao Prestressed Engineering Technology Co., Ltd.

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