News BAUER Dam Contractors International Ltd. - Newsfeed en Diavik Diamond Mine, Northwest Territories, Canada <p>Successful completion of the cut-off wall works for the fourth kimberlite pipe, called A 21, at Diavik Diamond Mine. The mine is located on a 20 square kilometers island in Lac de Gras, approximately 220 kilometers south of the Arctic Circle and 300 kilometers by air northeast of Yellowknife, the capital of Northwest Territories<br /><br /><strong>Period of Construction:</strong> May 2016 – November 2017<br /><br />In order to construct an open pit mine at A 21, a 2.2 km perimeter dike was constructed and an up to 26 meter deep cut-off wall installed. Bauer convinced the client to apply the Cutter-Soil-Mixing method (CSM), which combines cutter diaphragm walling technologies and the Mixed-in-Place method. The CSM technique is implemented through the use of trench cutters that are specially modified for this process. By utilization the in-situ soils, the CSM technique provides substantial logistic advantages and cost savings compared to methods that are more traditional.<br /><br /><br /></p> <p> </p> <p style="text-align: center;"><img dir="ltr" style="width: 450px;" title="A21-Looking-West-Pano" src="" alt="A21-Looking-West-Pano" /></p> 2018-04-16T06:30:31Z JANNAH DAM (Lebanon) <table border="0" width="600" cellspacing="1" cellpadding="1"> <tbody> <tr> <td colspan="2" valign="top" height="40"> <p>Despite the complicated soil conditions related to coarse alluvial valley deposits, associated with challenging hydraulic flow conditions, the 50m deep cut-off walls on the upstream and downstream sides of the Jannah Dam in Lebanon were finalized in the last days of 2017. The last panel was cast on December, 28<sup>th</sup> and the cut-off wall handed over, to the full satisfaction of the client, ahead of the schedule, despite the additional cut-off wall extensions into the fragmented mountain massif on the flanks.</p> </td> </tr> </tbody> </table> <table style="height: 222px;" border="0" width="309" cellspacing="1" cellpadding="1"> <tbody> <tr> <td> <img style="width: 590px;" title="News_Jannah_dam" src="" alt="" /></td> </tr> </tbody> </table> <p> </p> 2018-01-16T15:14:41Z Mseilha Dam, Lebanon <table border="0" width="600" cellspacing="1" cellpadding="1"> <tbody> <tr> <td colspan="2" valign="top" height="40"> <p> <strong><br />Mseilha Dam, Lebanon<br /></strong></p> <p>On June 16<sup>th</sup>, 2017 the 50m deep cut-off wall on Mseilha Dam in Lebanon was successfully finalized, ahead of the schedule and to the full satisfaction of the Client. The execution of the approx. 10.500m² of the cut-off wall, in noticeably heterogeneous soil conditions, was a real pioneer work in Lebanon, being the first cut-off wall on dams, the first ever cutter-excavated diaphragm wall and the first plastic concrete application in specialized geotechnical works in the country."    </p> </td> </tr> </tbody> </table> <table style="height: 222px;" border="0" width="309" cellspacing="1" cellpadding="1"> <tbody> <tr> <td> <img dir="ltr" style="width: 590px;" title="Mseilha" src="" alt="Mseilha" /></td> </tr> </tbody> </table> <p> </p> 2017-07-10T12:27:13Z Cut-off Wall for Skhalta Dam <table border="0" width="600" cellspacing="1" cellpadding="1"> <tbody> <tr> <td colspan="2" valign="top" height="40"> <p> <strong><br />  Cut-off Wall for Skhalta Dam, Adjara/Georgia </strong></p> <p> The plastic concrete secant pile cut-off wall was successfully completed by BAUER Georgia Foundation<br /> Specialists LLC in February 2017.<br /><br /> 133 nos. secant piles with a nominal diameter of 1500 mm were executed with 500 mm intersecting <br /> with adjacent piles. Average depth amounted to 26,5 m; the longest pile depth was 34,3 m. A total of <br /> 3500 m piling was installed using a BAUER BG 28 with a BV 1500 oscillator.<br /><br /> As specified, piles at the abutments had to be installed at least 1 m into the competent rock. Other<br /> piles were designed to be embedded into the coarse alluvium, a stratum below a 2 m thick clay layer.<br /> All pile depths and rock/alluvium levels were checked and confirmed by inspectors of Mott MacDonald.<br /> A rope inclinometer device was used to assure overcut at each pile for wall continuity within the <br /> designed tolerances. <br /> <br /> The toughest part was working during heavy winter conditions.</p> </td> </tr> </tbody> </table> <table style="height: 222px;" border="0" width="309" cellspacing="1" cellpadding="1"> <tbody> <tr> <td><img style="width: 290px;" title="Skahlta_Dam2-NEU" src="" alt="" /></td> <td style="text-align: right;"><img style="width: 290px;" title="Skahlta_Dam1-NEU" src="" alt="" /></td> </tr> </tbody> </table> <p> </p> 2017-03-17T09:41:15Z Punatsangchhu Hydropower Project-2 <p>On May 2015, BAUER Spezialtiefbau GmbH completed successfully the Permeation Grouting works at the Punatsangchhu River for the Punatsangchhu Hydropower Project-2 (PHEP-2). It is already Bauer’s third project accomplished in the Kingdom of Bhutan. The purpose of the works was the installation of a seepage cut-off at the upstream cofferdam for a safe construction of the main dam. <br />Despite the very difficult subsurface conditions including extensive boulders drilling and the extremely difficult working conditions in a remote location as Bhutan, the cut-off wall works were completed in a successful way. Approximately 35,000 linear meters have been drilled and grouted since the award in 2014.<br /><br />The works were executed by utilizing 2 nos. of drilling units Klemm KR 806-2DB and 12 nos. of Obermann Grout Pumps over a construction period of 12 months.</p> <p><img style="width: 595px; display: block; margin-left: auto; margin-right: auto;" title="punatsangcchu-II" src="" alt="" /></p> 2015-06-08T06:03:28Z Cut-off Wall for Bagatelle Dam in Mauritius <p>The plastic concrete cut-off wall was successfully completed in May 2015 by BAUER Spezialtiefbau GmbH. <br /><br />The last panel of the 56,781 m² cut-off wall was finished on May 9th, 2015 in the presence of members of the Engineer (Artelia Eau &amp; Environment), the Chinese Ambassador, the Main Contractor (China International Water &amp; Electric Corp. CWE) and Prof. Dr. Thomas Bauer, CEO of the BAUER Group. <br /><br />Despite the very difficult soil conditions including extensive rock excavation on site, the cut-off wall works were completed slightly ahead of the specified construction schedule. Approximately 20,000 m² of moderately weathered and slightly weathered basalt had to be penetrated over the entire 2,400 m in length of the new dam structure. Within the Central Area of the proposed dam up to 28 m heavy basalt rock layers had to be excavated to reach the specified toe level of the cut-off wall. <br /><br />The works were executed by utilizing up to three BAUER cutter units BC 40 and two grab units over a construction period of 14 months.<br /><br /><img style="width: 595px; display: block; margin-left: auto; margin-right: auto;" title="bagatelle-dam-completed" src="" alt="" /></p> 2015-05-19T15:04:25Z Mangdechhu Hydroelectric Powerplant Project <table border="0" width="600" cellspacing="1" cellpadding="1"> <tbody> <tr> <td> <p> <strong>Execution of Cut-off Wall Works at Mangdechhu successfully completed</strong></p> <p> In August 2014, Bauer successfully completed a plastic concrete cut-off wall at the Mangdechhu river <br /> for the 720 MW Mangdechhu Hydroelectric Powerplant Project, the second such wall installed in the <br /> center of Bhutan. The two-phase cutter excavated cut-off wall was executed including pre-treatment.<br /> In the V-shaped valley, the excavation through boulders reaches bedrock along the exposed rock <br /> surface, rock-strength with UCS-values in excess of 100 MPa, and down to as deep as 57 m below <br /> actual working platform level.</p> </td> </tr> <tr> <td style="text-align: center;"><img style="width: 590px;" title="mangdecchu_completed" src="" alt="" /> </td> </tr> </tbody> </table> <p> </p> 2014-11-10T12:47:36Z Assiut Barrage <table width="600" cellspacing="1" cellpadding="1" border="0"> <tbody> <tr> <td> <p><strong>&nbsp;Single Phase and Double Phase Cut-off Wall successfully completed</strong></p> <p>&nbsp;In a first step Bauer constructed 60.000 m&sup2; of temporary single phase cut-off wall for the ring dam&nbsp;&nbsp; <br /> &nbsp;(with depths of 38.2 m and 80 cm thickness) and 85 nos of dewatering wells.</p> <p>&nbsp;In December 2013 the construction of 25,000 m&sup2; of double phase cut-off wall underneath the new&nbsp; <br /> &nbsp;barrage as well as the construction of 8,600 m&sup2; of diaphragm wall as foundation for the barrage piers <br /> &nbsp;were completed. <br /> &nbsp; <br /> &nbsp;Until 2016 21,000 m&sup2; of permanent cut-off wall with a thickness of 80 cm for the diversion canal will <br /> &nbsp;be executed.</p> </td> </tr> <tr> <td style="text-align: center;"><img alt="" class="image_border_grey" dir="ltr" style="width: 593px;" src="" /></td> </tr> </tbody> </table> 2014-01-09T07:39:50Z DAUVIN Project <table width="600" cellspacing="1" cellpadding="1" border="0"> <tbody> <tr> <td> <p><strong>&nbsp;Reinforced Concrete Diaphragm Wall successfully completed</strong></p> <p>&nbsp;BAUER Fundaciones Panamá, S.A. was awarded the construction of two foundation structures for an<br /> &nbsp;irrigation infrastructure project in Ecuador.<br /> <br /> &nbsp;The first part of the works included approximately 6,200 m&sup2; of plastic concrete cut-off wall with <br /> &nbsp;maximum penetration depths of up to 27 m, the main works were successfully completed in October&nbsp;<br /> &nbsp;2013. <br /> <br /> &nbsp;The second part of the contract included a reinforced concrete diaphragm wall next to one intake&nbsp;&nbsp;&nbsp; <br /> &nbsp;structure. The diaphragm wall was built for the stabilization and protection of the right side of the new <br /> &nbsp;river slope. The work consisted in excavation of panels up to 15 m deep over 509 m of extension, in <br /> &nbsp;total 7,632 m&sup2; of wall. The works where carried out from November 2013 to January 2014 over 75 <br /> &nbsp;working days, 25 of which during the rainy season.<br /> <br /> &nbsp;The Rio Daule-Vinces water transfer project (DAUVIN) aims to transfer 100 m&sup3;/s from an intake on<br /> &nbsp;the Daule River to the Vinces, Pueblo Viejo and Colorado rivers. The water will then be diverted to<br /> &nbsp;local streams, where irrigation infrastructure will be built to supply an area of 215,000 ha.</p> </td> </tr> <tr> <td style="text-align: center;"><img src="" style="width: 590px;" dir="ltr" class="image_border_grey" alt="" /></td> </tr> </tbody> </table> 2013-08-21T08:24:51Z Matala Dam <table width="600" cellspacing="1" cellpadding="1" border="0"> <tbody> <tr> <td> <p><strong>&nbsp;Cut-off Wall successfully completed </strong></p> <p>&nbsp;BAUER Angola LDA has executed and successfully completed the slurry cut-off wall for the Matala <br /> &nbsp;Dam Rehabilitation Project in Angola; a contract signed with SNC-Lavalin Angola LDA.<br /> <br /> &nbsp;The scope of work included 2575 m&sup2; cut-off wall with a width of 0.6 m to a depth of approx. 10 m.<br /> <br /> &nbsp;The Matala dam lies around 225 km downstream from the Gove dam at the confluence of the Que and<br /> &nbsp;the Kunene river, on the edge of the Upper Kunene. The dam was the first major structure to be <br /> &nbsp;completed in the basin in 1954.</p> </td> </tr> <tr> <td style="text-align: center;"><img alt="" class="image_border_grey" dir="ltr" style="width: 224px;" src="" /> &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &nbsp; <img alt="" class="image_border_grey" dir="ltr" style="width: 224px;" src="" /></td> </tr> </tbody> </table> 2013-08-27T12:33:12Z San Vicente Dam <table width="600" cellspacing="1" cellpadding="1" border="0"> <tbody> <tr> <td> <p><strong>&nbsp;First Cut-off Wall project in Ecuador successfully completed </strong></p> <p>&nbsp;BAUER Fundaciones Panamá S.A. has successfully constructed a Bentonite/Cement cut-off wall as part<br /> &nbsp;of the remedial works in the spillway area of the San Vicente Dam in Ecuador.<br /> <br /> &nbsp;The executed 2,300 m&sup3; cut-off wall is an element of a newly constructed cofferdam located on the <br /> &nbsp;upstream side of the existing spillway. The average cut-off wall depth is 14 m.<br /> <br /> &nbsp;The remedial work of the spillway area is necessary to close severe water washout caused due to an <br /> &nbsp;earthquake and heavy waterfalls during one &ldquo;El niño&rdquo; phenomena.<strong><br /> </strong></p> </td> </tr> <tr> <td style="text-align: center;"><img src="" style="width: 558px;" dir="ltr" class="image_border_grey" alt="" />&nbsp;</td> </tr> </tbody> </table> <p>&nbsp;</p> 2013-08-27T12:12:24Z Sylvenstein Flood Control Project <table width="600" height="200" cellspacing="1" cellpadding="1" border="0"> <tbody> <tr> <td valign="top" height="40" colspan="2"> <p>&nbsp;<strong><br /> &nbsp;Dam rehabilitation successfully completed </strong></p> <p>&nbsp;For the rehabilitation of the Sylvenstein reservoir, Bavaria&rsquo;s most important dam, a plastic concrete <br /> &nbsp;cut-off wall (CCOW) to a depth of up to 70 m was required to rehabilitate the dam core and to key-in <br /> &nbsp;to the adjacent rock abutments and an existing concrete structure at the right side.<br /> &nbsp;The rehabilitation was designed to improve the dam for future usage expected due to the climate <br /> &nbsp;change.<br /> <br /> &nbsp;Bauer was awarded to by the Bavarian Ministry of Environment and Health to install the CCOW as a <br /> &nbsp;Prime Contractor. <br /> <br /> &nbsp;The 10,000 m&sup2; wall of 1 m thickness was installed successfully and in time by Bauer Spezialtiefbau <br /> &nbsp;GmbH with a Bauer Trench Cutter BC 40 and a Bauer Hydraulic grab. The Trench Cutter was built to <br /> &nbsp;suit the extremely narrow working platform.<br /> <br /> <a href="" target="_blank"></a></p> </td> </tr> </tbody> </table> <table width="600" cellspacing="1" cellpadding="1" border="0"> <tbody> <tr> <td><img src="" style="width: 290px" alt="" class="image_border_grey" dir="ltr" /></td> <td style="text-align: right"><img src="" style="width: 290px" alt="" class="image_border_grey" dir="ltr" /></td> </tr> </tbody> </table> <p>&nbsp;</p> 2013-03-25T14:28:22Z Center Hill Dam Foundation Barrier Wall - Construction Begins with "First Bite" Ceremony 2012-07-13T09:23:25Z Punatsangchhu Hydro Electric Project-1 <table width="600" height="500" cellspacing="1" cellpadding="1" border="0" style=""> <tbody> <tr> <td valign="top" height="200" colspan="2"> <p><strong>&nbsp;<br /> &nbsp;Concrete Cut-off Wall successfully completed</strong></p> <p>&nbsp;For the excavation pit necessary to build the new dam in Bhutan at the Punatsang-river, cut-off walls&nbsp; <br /> &nbsp;at the upstream and the downstream cofferdams are required. The project is being developed by <br /> &nbsp;Punatsangchhu-I Hydroelectric Project Authority and the construction company Larsen &amp;Toubro (L&amp;T)<br /> &nbsp;has been awarded to construct the dam.<br /> &nbsp;BAUER Spezialtiefbau GmbH was awarded by L&amp;T to install a concrete cut-off wall at the upstream <br /> &nbsp;cofferdam to prevent undue seepage into the planned excavation pit.<br /> &nbsp;Pre-treatment by grouting of the alluvial ground conditions in the vicinity of the wall and the <br /> &nbsp;installation of the concrete cut-off wall with grab and Bauer Trench-cutter was executed and managed <br /> &nbsp;by Bauer. Bauer executed the works in 2012 and completed the works successfully and in time.</p> </td> </tr> <tr> <td valign="top" style="text-align: center;">&nbsp;<img src="" style="width: 200px;" alt="Punatsangchhu" title="Punatsangchhu" dir="ltr" class="image_border_grey" /></td> <td valign="top" style="text-align: center;"><img class="image_border_grey" dir="ltr" title="Punatsangchhu2" alt="Punatsangchhu2" style="width: 226px;" src="" /></td> </tr> </tbody> </table> <p>&nbsp;</p> 2013-03-13T15:17:35Z