德克斯达集团|可靠的连接

绿金杜巴一体化太阳能联合循环电站

绿金杜巴一体化太阳能联合循环电站

Duba ISCC Green Power Plant 1 is a large power infrastructure project located in the northwest of Saudi Arabia, along the Red Sea. The ISCC (Integrated Solar Combined Cycle) technology adds 50 MW of solar power to the gas and steam turbines, generating a total of 500 MW of electricity.

For this project, Dextra supplied Double Corrosion Protection Ground Anchors, used as a permanent anchoring solution for the excavation work preparing the pumping chamber. A total of 264 anchors (Grade 1080/1230, Ø32 & 40 mm) were supplied and installed across four layers.

Double Corrosion Protection anchors supplied for this project were pre-grouted at the Dextra factory, applying the first layer of grout between the steel bar and HDPE sleeve. The pre-grouted segments were reconnected on-site using couplers. Pre-grouted anchors not only save time and reduce costs during on-site operations, but they also enhance overall anchor quality by ensuring that the first grout layer is applied in a factory-controlled environment.

现场安装由地基承包商宝华 (BAUER) 进行,该承包商执行钻孔、起重、安装、灌浆和后张拉作业。 Dextra 在安装的早期步骤中通过派遣岩土工程专家团队到现场提供指导。

一般安装顺序如下(如下图所示):

  1. 从运输架上拆箱后,用耦合器拼接各段,并用热缩套管覆盖。
  2. 将组装好的锚从组装现场运输到吊装区域(每延米 13 公斤)。
  3. 锚头处的布线电缆用于控制下降。注浆管也沿着锚预先安装。
  4. 将30米锚连同注浆管插入钻孔中。
  5. 灌浆、施力后,将充满油脂的头帽安装在锚头上,保持锚与外界腐蚀性环境完全隔离。

有关我们在中东的挖掘和地面解决方案的更多信息,请联系我们 迪拜办事处.

多哈地铁 Msheireb 站

多哈地铁 Msheireb 站

Msheireb 站是多哈地铁的主要换乘站。它位于多哈市中心,连接所有三条线路(红线、绿线和金线),并将成为 2022 年 FIFA 世界杯体育场馆的门户

Msheireb 站将成为世界上规模最大的地铁站之一。

软眼 for TBMs

For this major project, Dextra engineered and supplied between 2013 and 2015 8 large ASTEC GFRP Soft-Eyes, of a diameter of 8 meters each. Soft Eyes are cages of GFRP rebar, positioned into the D-Walls in-between steel segments. GFRP Soft-Eyes allow Tunnel Boring Machines (TBMs) to go through in a minimum time as the bars can be easily crushed by the tunnel machine.

回系锚

To anchor the massive d-walls and prevent any soil displacement during excavation works, Dextra also supplied its ASTEC 主动锚 (AAA). Those innovative post-tensioned GFRP-based anchors, have the benefits of being cut by the Tunnel Boring Machines or standard excavation equipment. Because it can be easily cut, it doesn’t need to be removed from the ground, even when used for temporary applications.

就 Msheireb 站而言,甚至在 Soft-Eye 中心安装了多筋锚(该项目中每个锚 10 个)来锚定 D-Wall。这些锚在隧道突破过程中也被切断(在下面的视频中可见)。车站内总共安装了 150 个锚。

那格浦尔地铁,零英里地铁站

那格浦尔地铁,零英里地铁站

那格浦尔地铁零英里站位于马哈拉施特拉邦那格浦尔市的一个混合用途交通/停车/商业项目中。它位于从北到南穿越城市的新地铁线上。零英里站是一个地铁站,由一栋 12 层建筑组成,将设有商业区和可容纳 430 辆车的停车场。

对于该项目,Dextra 于 2017 年参与了地锚的供应和安装,以稳定挖掘区域周围的地面。

Dextra 提供了其创新的 ASTEC (FRP) 主动锚解决方案(AAA),一种特殊类型的地锚,在临时应用的情况下,可以在项目结束后留在地下,即使这些地锚超出了地界线或穿过未来的隧道。

事实上,FRP 锚杆的一个主要优点是使锚杆完全可以通过传统的挖掘设备切割,使其成为传统可移动锚杆的最佳替代品,传统可移动锚杆是最终需要用蛮力从地面移除的钢锚杆。的项目。

Dextra ASTEC 主动锚便于运输,可以由工人搬运到最终位置。一旦插入钻孔,每个锚栓都会被灌浆,然后使用连接到 FRP 锚栓的传统 PT 钢绞线施加应力。安装后,锚固件可以保留在地下,这与传统的可拆卸锚固件不同,传统的可拆卸锚固件需要额外的项目管理并产生报废锚固件拆除成本。

有关印度 Dextra 锚固解决方案的更多信息,请联系我们 孟买办事处.