Wittgen SP Small slipform pavers are ideal for side-paving cement concrete structures of various shapes。It has significant advantages in construction efficiency and quality.，It has gradually replaced the traditional manual way.，More and more widely used in curbs、Drain、Anti-collision guardrail and other concrete structures of various shapes。

In Guizhou this time G60 Slip form construction project of concrete guardrail with steel strand in the middle of Shanghai-Kunming Expressway，Wirtgen China works closely with the owner, Guizhou Expressway Group，Many in-depth exchanges and discussions have been conducted.，Wittgen was used successively SP 15 Cooperate with the project party to carry out the slip-form test section of the steel cage type New Jersey guardrail and the innovative low-reinforcement steel strand concrete guardrail.。

Through the slip-form test and the research of material mix proportion，Thanks to the professional technical support and excellent machine performance of the Wittgen slipform team，And the unremitting efforts of the project side，The slipform effect of the concrete guardrail is ensured，Finally, it gains the recognition and trust of all parties to the project.，It is the first time for the construction party to lay a new type of guardrail with low reinforcement in China.。

The first application of low-reinforced concrete guardrail in China

To further strengthen G60 Shanghai-Kunming Expressway and G75 Safe operation guarantee capability of Lanhai Expressway，Improve the safety service level of expressway，The project party decides to improve the safety of traffic safety facilities.。

The principle of guardrail reconstruction is to adopt corrugated beam guardrail in the 2-meter section of the central divider.，And that width of the median is 1.The 5-meter section is dominated by low-reinforced concrete guardrails.。In order to implement Guizhou Province“An Avenue、Two ways of scenery、Flowers in three seasons、Evergreen all the year round”Requirements of，At 5-Set 500 behind the integral concrete guardrail of 10km -1000 Meters of separated corrugated beam guardrail。

   After the foundation at the bottom of the guardrail is pretreated，Road sections to be paved with low-reinforced concrete guardrails

The design unit specially carries on each kind of research as well as the real vehicle full-scale collision test to the new guard rail.，The protection level is determined as five.（SAm）Level。This low reinforcement、The single-slope integral concrete guardrail structure is the first research in China.，It is of great significance to the development of concrete guardrail structure in China.。

Compare with that traditional concrete guardrail, the novel guardrail，Material Cost Savings 15%Above，And the construction efficiency is greatly improved while the protection performance is met.，For in-service highways，And can effectively reduce that influence of construction on highway operation.。

   Wittgen SP 15 Slip-form paver is laying a new type of low-reinforcement monolithic concrete guardrail，There is no need to prepare reinforcement cages in advance.，Several strands of steel bars are used as reinforcement support.，Cement concrete material integral forming

   SP 15 Effect of low-reinforced concrete guardrail laid

Construction highlights

It is different from the traditional high-reinforcement anti-collision guardrail with embedded reinforcement cage.，The low reinforced concrete guardrail uses several strands of steel strands instead of steel mesh.，Therefore, there is less support，Slump of concrete material、Compactness and other performance requirements are higher。In addition, the amount of construction is large，The construction period is long、The labor cost is high、There are safety risks and other problems for workers involved in road construction for a long time.，Adopt and save manpower，The more efficient mechanized construction method has more advantages for the project side.。

It has been proved by market practice.，Wittgen slipform paving technology, which has outstanding performance in equipment performance and stability and reliability, has won the favor of the project side.。The project has 8 bid sections in total.，At present, four bidding sections have been started normally.，All using Wittgen. SP Efficient construction of 15 slipform paver。

Wittgen SP Flexible structural design and intelligent and accurate elevation control system can meet the needs of special working conditions.。Three walking tracks can swing freely，Flexible positioning，When facing a large concrete structure such as a central guardrail， SP 15 The front two tracks can be opened to both sides.，The rear track moves to the side of the mold，So that that stability of the machine is improve。

SP It is also equipped with high-precision leveling sensor and steering sensor for automatic walking.，It is especially suitable for Guizhou highway with many bends and steep slopes.，Ensure that the structure can follow the preset linetypes exactly、Precise paving at the elevation。

In addition，When SP 15 when moving forward at preset speed，Multiple hydraulic vibrators in the mold can independently adjust the vibration frequency.，Ensure that the concrete material has the desired degree of compaction，Can be better combined with the embedded steel strand。The concrete subjected to high-frequency vibration is extruded by a mould to form uniform、Quality、Smooth concrete structures。Compared to artificial，Sutra SP 15. The formed concrete structure is in good shape.、The stability is strong，Material loss can also be reduced.。

   In case of normal supply of materials，Single set SP 15 The equipment can advance more than 300 meters per day.，Efficient and labor-saving

Wei has something to say

Wittgen SP The performance and construction quality of 15 slipform paver have been tested by the Chinese market for a long time，This is the first time that the new technology of low reinforcement guardrail has been applied in China.，That's right, too SP 15 Another verification of equipment performance and quality。

For more equipment information and field visits to application cases，Please contact the local agent of Wittgen in China.，A professional will provide more tailored advice based on your needs。