Gunnar Lah

Title: Innovations by Inventor Gunnar Lah

Introduction

Gunnar Lah is a notable inventor based in Erzhausen, Germany. He has made significant contributions to the field of tunnel construction through his innovative patents. With a total of three patents to his name, Lah has developed processes that enhance the efficiency and effectiveness of lining tunnels with extruded concrete.

Latest Patents

One of Gunnar Lah's latest patents is a process for continuously lining a tunnel with extruded concrete. This invention involves a tunnel that has an inner surface and extends along an axis. The process utilizes pumpable concrete with a predetermined hardening time and a form that features an annular inner wall and an axially movable front wall. Substantially equal-sized batches of pumpable concrete are injected into the space through the movable front wall via multiple angularly equispaced ports. The batches are injected at a rate that ensures each batch spreads over a predetermined axial and angular distance, optimizing the lining process.

Another significant patent by Lah is a process and apparatus for continuously lining a tunnel with extruded concrete. This invention employs a pumping device for feeding the concrete and a form with an interior form member and a forwardly movable form front. The extruded concrete is placed without clump formation by providing it in equal-sized segments that are fed in succession. The form front is equipped with multiple concrete input ports that are uniformly distributed and connected to the pumping device, allowing for efficient servicing of the ports.

Career Highlights

Gunnar Lah has worked with prominent companies in the construction industry, including Hochtief Aktiengesellschaft and Hochtief AG. His experience in these organizations has contributed to his expertise in tunnel construction and concrete applications.

Collaborations

Throughout his career, Lah has collaborated with notable professionals such as Siegmund Hflm Babendererde and Otto Braach. These collaborations have likely enriched his work and led to further innovations in his field.

Conclusion

Gunnar Lah's contributions to tunnel construction through his innovative patents demonstrate his expertise and commitment to advancing the industry. His work continues to influence the methods used in lining tunnels with extruded concrete, showcasing the importance of innovation in engineering.