Permanent Construction Pit Waterproofing with advanced Injection Technology

• Name

  Mandarin Oriental Project in Tel Aviv

• Country

  Israel, 2023

• Categories

  Injection Systems

• Products

  MC-Injekt GL-95 TX
  MC-Injekt 2133

Located on the Mediterranean coast, Tel Aviv is the economic and cultural centre of Israel and is regarded as the most vibrant city in the country. Directly on the beach promenade, a particularly exposed construction project is currently being implemented by the Hong Kong-based Mandarin Oriental Hotel Group, which operates luxurious hotels, resorts and residences in the most beautiful places in the world.

Prestige tower complex in Tel Aviv

The Mandarin Oriental Tel Aviv project comprises two 25-storey towers. One is planned as a luxurious residential block with 230 apartments, the other as an equally luxurious hotel offering 227 rooms. There are also plans for the provision of commercial space below the residential tower. In the immediate vicinity are some of the most attractive districts of the metropolis, including the shopping mile Neveh Tzedek, Old Jaffa with its rich traditions, and the famous Rothschild Boulevard.

Water penetration problem

Excavation and stabilisation of the soil began back in 2020. The water table, which is very high in Tel Aviv, posed particular problems in the early construction phase, with water penetrating the 15-metre-deep excavation pit, making it difficult to build the slurry cutoff walls. Commissioned to build the towers, Israel's leading construction and infrastructure company Solel Boneh Building and Infrastructure Ltd., turned to A.Z. Marketing, a long-standing cooperation partner of MC in Israel, to find a solution to the problem.

The answer: two-stage injection

After the specialists from A.Z. had inspected the construction site and gained a picture of the necessary waterproofing measures, they recommended stopping the water ingress with a two-stage injection system devised by MC. And to ensure that the materials were professionally applied, the contracted application team was first jointly trained by A.Z. and MC.

Permanent waterproofing

The first sealing measures were then carried out with the fast-foaming, single-component injection resin MC-Injekt 2133 combined with MC-Injekt 2133 flex, a highly flexible and effective water-stopping injection resin. In places where the injection materials did not provide a solution because there were problems with the concrete, the slurry walls were repaired with cementitious materials. This resulted in the water ingress being kept at bay until the foundation soil could be prepared.

 

Only then was the construction pit fully waterproofed across its entire expanse. This was done using MC-Injekt GL-95 TX, a swelling, flexible sealing acrylate gel that can be injected into concrete and masonry as well as into foundation soil. MC-Injekt GL-95 TX impresses by virtue of its very good injectability, regulated reaction times and readily controllable injection paths. Thanks to its high elasticity and good swelling capacity, the hydrogel provides a secure seal and is permanently watertight in moist media. Thus, the experts from A.Z. and MC were able to solve the problem with a sustainable solution, allowing the construction work in Tel Aviv to continue to plan.