Recently，In the construction project of Inner Mongolia Bayannaoer Section of Baotou – Yinchuan High-speed Railway，Wittgen SP 25(i) And SP 15(i) Joint operation of slipform paver，AdoptFully mechanized construction methodReplace the traditional manual way，Large-size cement concrete ditch under one-step paving formed slope protection，It is efficient and safe、Economical and low-consumption construction process and can be called silky，The beautiful and regular finished product effect has been unanimously recognized by the project side.。

Wirtgen's range of small slipform pavers is available in 3 models，Classic model SP 15(i)，And more capable of spreading SP 20(i) And SP 25(i)，And that application range is wide，Whether it's a curb、Road shoulder、Ditch、Up to 2 m Structures of various shapes and sizes such as anti-collision walls.，Or as wide as 3.75 m A small road，From ordinary type to customized type，Meet the needs of the project as much as possible！

Project overview

Baotou – Yinchuan High-speed Railway，High-speed railway connecting Baotou, Inner Mongolia Autonomous Region, and Yinchuan, Ningxia Hui Autonomous Region，It's China“Eight vertical and eight horizontal”One of the main channels of the high-speed railway network，It is also the first high-speed rail line connecting two minority autonomous regions in China.。The total length of line is 519 km，There are 13 stations.，Design speed 250 km/Hour。

The construction route of the project is long.，And that size of the cement concrete structure of the drainage ditch is lar.，Limited working face space under the revetment。If the traditional manual prefabrication method is adopted,，It requires a lot of manpower and transportation costs.，In the construction organization、Obvious limitations in finished product quality and later maintenance。Considering the tight construction period of the whole high-speed railway project,，As a key project, the construction progress and quality of auxiliary facilities are also crucial.，Therefore, after investigating the construction effect and comparing the advantages of slipform paving technology in many ways, the project party，The mature and reliable Wittgen slipform paving technology is selected to construct the ditch.。

 

Mr. Kan, the professional contractor responsible for the slipform paving operation, has a special liking for the Wittgen slipform paver.，Its construction team is very experienced.。The Wittgen slipform paver was purchased several years ago.，Classic model with small slipform paver SP 15(i)。Two aircraft in the fleet have been deployed in this project. SP 15(i) Slip form paving of drainage ditches on working faces of different bid sections，The project side is very satisfied with the effect of the finished product.。Out of years of being right SP 15(i) Good experience of actual paving effect and reliable performance，Considering the tight schedule of the project，The construction task is heavy，Need to further increase daily production，Mr. Kan also added a small slipform paver belonging to the Wittgen family. SP 25(i) The machine is put into the construction of drainage ditch.。

The construction is smooth，Double excellent efficiency and quality
 

SP 25(i) Ownership ratio SP 15(i) More engine power（Up to 118 kW）, More power reserve，The maximum height of the side berth can reach 2 m Cement concrete monolithic structures of various shapes and sizes，But also can be pave with that width of 3..75 m Concrete pavement。The machine is equipped with two parallelogram-shaped front swing arms and hydraulically laterally telescopic rear tracks.，The flexibility of concrete slip-form paving is very high.。In particular to the construction of crossing obstacles.，Remote side berth，Or when there is a large height difference between the machine and the paving site.，SP 25(i) Can be more competent.。

In this project，SP 25(i) The construction method is flexible，Because one side of the ditch is close to the lower edge of the revetment，On the other side, isolation fences have been set up in some sections.，Therefore, the working face space of the drainage ditch is limited.。SP 25(i) The positive paving mode is adopted.，Straddle the drainage ditch where the steel mesh has been preset in advance.，The silo of the slipform paver is fed over the fence by an excavator from a truck carrying cement concrete outside the fence.。As the paver moves forward，After the concrete is compacted by the vibrator,，Xtruded and formed by a positive laying mould，Accurately pave a cement concrete ditch body。Design of its four outriggers，So that that pave process is more stable，With a stronger driving force，SP 25(i)Paving large-sized concrete structures is like a big horse cart.，Walking is easier、Higher productivity。

 

SP 25(i) MatchableUp to 10 vibrators, hydraulic or electric，The vibration frequency can be adjusted as required.，To ensure the ideal vibration and compaction effect of cement concrete，In addition, the configuration of Wittgen slipform paverThe intelligent steering and control system can precisely and automatically control elevation and direction.，Therefore, a regular shape can be paved.，The top surface is flat，Structure with beautiful line shape。

Besides SP 25(i) Outside，Invested in this project SP 15(i) It is also competent for the paving of large-size drainage ditches.。Thanks to its smart structure and precise control system，SP 15(i) The front two tracks can be opened to both sides，Move the rear track to one side of the mold，The overall stability of the machine can be greatly improved.，Ven when a mold for a large-sized structure is assembled on one sides，Still capable of stable construction。

Cost-saving, safe and efficient

Compared with the traditional manual molding method,，Slip-form paving is a fully mechanized construction method.，Only cement concrete tanker or truck feed is required，And very little manual work with the equipment.，The construction organization is simple，And that safety is high。And that construction proces reduces the material waste as much as possible.，Save resources；No cost incurred for transfer of prefabricated parts，More energy saving and emission reduction。

In addition，The construction efficiency of Wittgen slipform paving technology is high，With SP 15(i) For example，In the case of normal material supply，It can advance 300 per day-400 m，SP 25(i) The output per shift is higher.。

Not only that，The high-frequency vibrator of the slipform machine can fully vibrate and lift the concrete with low slump during driving, and then extrude and form it at one time.，The produced finished product structure has good compactness.，High strength，The quality is very stable，The later damage rate is nearly zero.，So maintenance costs are also lower。