Bridge Construction Requires Flexible Formwork

The ability of the formwork products to integrate with each other, simplified the process when more than one product was needed.

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The Challenge:

Remove and replace approximately 12,000 square feet of highway US-281 in Burnet County, Texas, including the steel-deck truss bridge that crosses the Colorado River.

The Players:

Doka
Archer Western Contractors

The Process:

Built in and rehabilitated in , the steel-deck truss bridge of highway US-281 that travels over the Colorado River in Marble Falls, Texas, is inefficient and will soon be replaced.

The bridge replacement project consists of the demolition of a steel truss bridge that will be replaced with twin cast-in-place segmental bridges. The bridges will each be three-span variable depth cast-in-place segmental structures. The spans of the bridge will be 274, 410 and 274 feet, with a bridge deck width of 47 feet. The structure will be built using the balanced cantilever construction method with end spans constructed on falsework. The box depth will vary from 23 feet at the interior piers, to 9 feet, 6 inches at the end spans, and have a variable super elevation of up to 5.5 percent.

The distinctive feature on this project is the overall V shape of the bridge. The bottom of the bridge starts with a deep V shape that tapers to a very flat V shape at the apex or center span. This required a form that was flexible in all directions, as no two segments were the same.

Formwork solution

The proposed bridge&#;s unique geometry required careful advance coordination between Doka and Archer Western Contractors. Doka had to create forms that were flexible from start to finish. The different span lengths at varied box depths required flexible formwork to accommodate the many wide-ranging needs.

Archer Western chose Top 50 formwork panels which were easily customizable to almost any configuration in the preassembly yard or on the jobsite. Top 50 allowed the contractor to use less labor, meet on-site requirements economically and improve safety with walkway brackets.

To meet the complicated geometry of this bridge in cost-efficient manner, Doka began by supporting the pier table with the Staxo high performance shoring system and using Top 50 formwork panels for the lower soffit, walls and upper soffit (or road deck). Staxo provided Archer Western with high shoring capacity, versatility, and quick and easy assembly using integrated couplers.

The pier table was poured in three separate steps. The formwork mostly stacked on itself so that shoring and form removal was kept to a minimum. When the pier table was complete, the traveler was set and the segment formwork was put in place.

Like the pier table, the backspan will be a three-step process in which Doka will supply the formwork and shoring. The backspan will use Staxo shoring and Top 50 formwork as well.

Formwork advantages

The ability of the formwork products to integrate with each other simplified the process when more than one product was needed. Additionally, since this project had innovative elements to the design, ingenuity and inventive thinking were required of the form supplier. For example, all of the forms from the pier table to the traveler had to allow for not only geometry changes but also field changes. This required flexibility that could not have been accomplished with the use of the traditional steel forms.

&#;The thing that I liked most about the Doka forms on this project is that the formwork hinges when stripped,&#; said Mike Wood, Archer Western Project superintendent. &#;With a steel form, we would have had to take it apart each time, but with the Doka forms they always stay together. This makes it fast and easy to strip and reset.&#;

The outcome will be a beautiful, well-constructed bridge that will serve the community for years to come without the constant maintenance required by the current steel bridge.

Basic Info.

Model NO.

TY-III

After-sales Service

Installation Instruction

Warranty

1 Year

Certification

ISO, SGS

Material

Steel

Type

Beam Formwork

Product Description

Cable-Stayed Forming Traveller

Certificate

ISO

Main Spans Length

128m

Trademark

Tong Yao

Transport Package

40"Ot

Specification

Assembly part

Origin

China

Product Description

Product Description

 

C

able-Stayed Forming Traveller

Cantilever casting of cable-stayed bridge mainly uses cable-Stayed Forming Traveller. In the cantilever construction of long section, large weight, wide main beam and single cable plane cable-stayed bridge, the conventional Forming Traveller structure has some defects, such as excessive and concentrated stress on anchor point of concrete main beam and poor lateral stability of hanging Forming Traveller. In view of the defects and shortcomings of the conventional Forming Traveller in cable-stayed bridge construction, we designed a new Forming Traveller structure -- composite cable Forming Traveller The structure design of the Forming Traveller is safe and reliable, the force is clear and reasonable, the operation is simple, and the comprehensive performance is superior.

 

Product Description

C

able-Stayed Forming Traveller

 

Origin

China/FTA

Trademark

 

TY-FORMWORK

Certificate

 

ISO

 

Production Capacity

 

Tons /Month

 

M

ain 

S

pans

 

64m~200m

Transport Package

 

E

xport 

S

tandard 

P

acking

 

Design Calculation

 

MIDAS

 

Sructural style

 

Modular Bolting /Welding

 

Method of assembly

 

On-site

 

Technical guidance

 

YES

Drawing supplied

 

Assembly drawings

 

Products Show

Packing & Delivery

Packaging

:

1. Generally, the total net weight of loaded container is 22 tons to 25tons, which need be confirmed before loading. 

2. Different packages are used for different products: 

---Bundles: Timber beam, steel props, tie rod, etc. 

---Pallet: Small parts will be put in bags and then on pallets. 

---Wooden cases: It is available on customer's request. 

---Bulk: Some irregular goods will be loaded in bulk in container. 

Delivery: 

1. Production: For full container, normally we need 20-30 days after receive customer's down payment. 

2. Transportation: It depends on the destination charge port. 

3. Negotiation is needed for special requirements.

Kaichaungxing supply professional and honest service.

About us

Shandong 

Tong

yao Heavy Industry 

Co

.,Ltd(STHI)

 

is an Professional High-tech Enterprise, Which is dedicated to the Research & Development, Manufacturing, Selling, Leasing and Consulting of Bridge Formworks and Road & Bridge and Tunnel Construction Equipment. The company was established in , locating in Binzhou City of Shandong Province

 China, 

and now is the bench-marking  enterprise of Road and Bridge Construction Equipment System.

Since its inception, the company has scrupulously abided by the values of "creating value for customers, opportunity for employees, and benefit for the society" and concentrated on providing our global clients with diversified products application solutions and creating the most valuable TongYao

 international

 brand. Till now, we have more than 40 kinds of products, including bridge steel structure, launching girder, form traveler, segment girder and hydraulic climbing formwork etc., which being widely used in bridge, municipal projects, water conservancy, tunnel, nuclear power and some other large projects. With the help of professional logistic system and after-sale service team, we strive to achieve the total logistic radiation of the key area throughout 

the world

, and make sure the rapid integration and scientific allocation of the resources.

                    

Certifcations

Customer Photos

FAQ

1. Where is your factory?

Our factory is located in Binzhou city, Shandong province, where is 350km far from Beijing, 200km far from Tianjin port. 

2. 

How fast can my order be delivered?

Ex works delivery is usually 30 days after receipt of your contract and advance payment.

3. 

What's the material of your products?

Steel GB Q235B or Q345B. 

4. 

What's your payment term?

 

1) 

50% TT in advance, balance before shipment.

2) 

50% TT in advance, 50% by 

Irrevocable l/C at sight.

Are you interested in learning more about Customizable Form Traveler for Bridges? Contact us today to secure an expert consultation!