Spiles and Forepoling Boards

Transcription

1 Spiles and Forepoling Boards

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3 Contents Introduction... 3 Rebar Spiles... 4 Tubular Spiles... 6 IBO - Self-Drilling Spiles... 8 Forepoling Boards Introduction Spiles and forepoling boards are used as temporary pre-support system for the working area. They ensure the stability of the perimeter of the open span until the primary lining is installed. Depending on the foundation soil characteristics, different spile types are used in order to achieve the best technical solution for each project. The products range from rebar spiles, IBO - Self-Drilling Spiles or the AT - TUBESPILE TM to forepoling boards, which permit driving in non-cohesive ground. 3

4 Rebar Spiles Rebar spiles and tube spiles are universally applicable as pre-support. They can be installed into pre-drilled, stable boreholes in blocky foundation soil as well as rammed into soft, homogenous foundation soil. Fields of Application Tunnel driving in blocky and jointed rock mass Tunnel driving in soft, homogenous foundation soil conditions Main Advantages Practice-proven spile system Secure and simple installation Universally applicable Installation using conventional drilling machines System Description Rebar spiles consist of smooth or ribbed steel bars that are pointed on one side. They are installed in pre-drilled grouted or ungrouted spile holes or are rammed into the foundation soil. Pre-drilled rebar spiles are installed in jointed and blocky rock mass as pre-support against falling blocks; ram spiles are installed in homogenous, soft foundation soil. By ramming, a loosening of the foundation soil is prevented, and an optimum initial condition for arching between the spiles is achieved. Following driving, the load of the foundation soil is transferred on the bearings by the resisting torque of the spiles. These are the ground ahead of the face and the support arch in the already supported excavation area. 4

5 Rebar Spiles Specifications Bar diameter 1) [mm] Delivery lengths 2) [m] 3 / 4 / 6 1) Spiles from smooth or ribbed concrete steel with a minimum steel grade of B 500 B (DIN and ÖNORM B 4707) 2) Pointed on one side; diverse lengths and unpointed concrete steel spiles are available on request Technical Features Simple and uncomplicated installation into pre-drilled spile holes Mortared annular gaps improve contact with the rock mass Ramming is an installation method which retains the original stress condition The foundation soil is displaced by ramming. This permits optimum conditions for subsequent load carrying Installation is possible above as well as through support arches Installation Procedure Installation into pre-drilled spile holes Pre-drilling of the spile holes through or over the support arch Filling of the spile holes with mortar (only for mortared installation) Installation of the Rebar spile Installation as ram spile Ramming of the rebar spiles through or over the support arch 5

6 Tubular Spiles Tubular spiles and rebar spiles are universally applicable for pre-support measures. They can be installed into predrilled, stable boreholes in blocky or jointed rock mass as well as rammed into soft, homogenous foundation soil. Fields of Application Tunnel driving in blocky and jointed rock mass Tunnel driving in soft, homogenous foundation soil conditions Main Advantages Practice-proven spile system Secure and simple installation Universally applicable Installation using conventional drilling machines Optionally also available as injection spile Higher section modulus than ram spiles or self-drilling spiles at comparable weight System Description Tube spiles consist of a steel tube, which is optionally provided with a welded ram top. The installation is carried out with conventional drilling machines. The tube spiles are either installed into pre-drilled spile holes or rammed directly into the foundation soil. Pre-drilled tube spiles are used for jointed and blocky rock mass as pre-support against falling rock mass, whereas ram spiles are applied in homogenous, soft foundation soil. By ramming, a loosening of the foundation soil is prevented, and an optimum initial condition for arching between the spiles is achieved. Following driving, the load of the foundation soil is transferred to the bearings by the spiles. These are the ground ahead of the face and the primary lining. 6

7 Tubular Spiles Specifications Outer diameter 1) [mm] Wall thickness [mm] Delivery lengths 2) [m] 3 / 4 / 6 1) Minimum steel grade S 235 (EN ) 2) Differing shipping lengths and injection boreholes according to customer demands are available on request Technical Features Simple and uncomplicated installation into pre-drilled boreholes Tube-ram spiles with steel point are available on request Foundation soil preserving installation by ramming the original stress condition remains Ramming displaces the foundation soil and allows for optimum load carrying characteristics at a later stage Installation is possible over as well as through the support arch High section modulus in relation to the weight Also available as injection spile with injection holes for ground improvement Installation Procedure Installation into pre-drilled spile holes Pre-drilling of spile holes through or over the support arch Insertion of tube spiles Installation as ram spile Ramming of the tube spile through or over the support arch 7

8 IBO - Self-Drilling Spiles IBO - Self-Drilling Spiles form part of the DYWI Drill Hollow Bar System product range. They are ideal for pre-support measures in all foundation soil types. Especially in unstable boreholes, the fast and self-drilling installation offers distinct advantages compared to conventional spile types. IBO - Self-Drilling Spiles support local instabilities in the working area. In poor foundation soil, this system is an excellent alternative to conventional ram spiles or steel tube spiles. Fields of Application Pre-support in any kind of foundation soil Especially suitable for foundation soils with unstable boreholes Main Advantages Installation using conventional drilling machines Secure, simple, and fast installation Unproblematic application in case of unstable boreholes Spile drilling and spile installation in one step Greater spile lengths can be achieved with couplings System Description IBO - Self-Drilling spiles are installed with conventional drill booms using rotary percussive drilling. The installed hollow bar simultaneously serves as drilling rod and reinforcement. The drilling energy is transferred onto the drill bit, which has a higher outer diameter than the hollow bar. Cooling, flushing, and backflush of cuttings is accomplished with water between the foundation soil and the IBO - Self-Drilling Spiles. 8

9 IBO - Self-Drilling Spiles System Components IBO - Self-Drilling Spile Optionally available with injection holes Spile drill bits or welded drill bit Specifications Outer diameter 1) [mm] R32 R38 R51 Delivery lengths 2) [m] 3.0 / 4.0 1) Technical Data is enclosed in the DYWI Drill Hollow Bar System brochure 2) Differing shipping lengths and injection holes according to customer demands are available on request Installation Procedure Assembly of the IBO - Self-Drilling Spile and connection onto the drill boom Rotary-percussive self-drilling installation without casing: Singleuse drill bit and hollow bar serving as drilling rod; flushing with water or an air-water-mixture Optional extension with couplings Decoupling from the drifter, optional subsequent injection using an injection adapter Technical Features Accessories Further Information Extensive drill bit portfolio for different foundation soil conditions Mortaring of the annular gap increases the load transmission and load bearing capacity Optionally with injection holes for ground improvement Mortar-mixing pumps Injection adapter DYWI Inject System Sleeve pipe packers Rock drilling equipment: shank adapters, couplings, and coupling adapters DYWI Drill Hollow Bar System brochure Further information about accessories can be found in DSI system brochures and technical approvals 9

10 Forepoling Boards Forepoling boards are used for laminaractive pre-support, which is particularly suitable for unstable, non-cohesive foundation soil. This support is rammed into the foundation soil using hydraulic drifters. Fields of Application Pre-support in non-cohesive foundation soil Pre-support in nearly non-cohesive foundation soil Main Advantages Installation using conventional drilling machines Secure and simple installation Closed support at the open span Ramming minimizes drive-induced rock mass stress relaxation System Description Forepoling boards are rammed over the support arch in a single step with conventional drill booms via a ram shoe. They are either installed overlapping or with a gap when the foundation soil shows little cohesion. Steel plate with one or two longitudinal seams Plate thickness: 3-6 [mm] Length: 1,250-3,000 [mm] Width: ca. 220 [mm] Forepoling board template Different versions available on request 10

11 Forepoling Boards Specifications t 175 B Forepoling boards Type A Characteristics Symbol Unit Type A3 Type A4 Type A5 Type A6 Thickness t [mm] Length 1) L [m] Width 2) B [mm] Weight m [kg/m] Weight m Pcs [kg/pcs] Resisting torque W x [cm³] ) Special lengths available on request 2) Guidance value installation width with overlapping: 5.7 pieces per meter 140 t B Forepoling boards Type B 1) Characteristics Symbol Unit Type B3 Type B4 Type B5 Type B6 Thickness t [mm] Length 2) L [m] Width 3) B [mm] Weight m [kg/m] Weight m Pcs [kg/pcs] Resisting torque W x [cm³] ) Dimension sheets and weight tables are available on request 2) Special lengths available on request 3) Guidance value installation width with overlapping: 5.4 pieces per meter Technical Features Ramming with drill-driving jumbo Secure and simple installation Closed and open support of the tunnel perimeter Ramming prevents settlement and stress release ahead of the construction 11

12 EMEA DYWIDAG-Systems International GmbH Alfred-Wagner-Strasse Pasching/Linz, Austria Phone Fax alwag@dywidag-systems.at North America DSI Underground Systems Inc S Prosperity Road West Jordan, UT 84081, USA Phone Fax dsiunderground@dsiunderground.com South America DSI Chile Industrial Ltda. Las Encinas #1387, Valle Grande Lampa, Santiago de Chile, Chile Phone Fax informaciones@dywidag-systems.cl APAC/ASEAN DYWIDAG-Systems International Pty. Ltd. 25 Pacific Highway Bennetts Green, NSW 2290, Australia Phone Fax dsi@dywidag.com.au Please note: This brochure serves basic information purposes only. Technical data and information provided herein shall be considered non-binding and may be subject to change without notice. We do not assume any liability for losses or damages attributed to the use of this technical data and any improper use of our products. Should you require further information on particular products, please do not hesitate to contact us. ALWAG (AM 952/79), AT (AM 6138/2003), AT-SYSTEM (AM 6139/2003), DYWI ( ), LSC (AM 4326/2008), OMEGA-BOLT ( ), POWER SET (AM 6163/2002), and TUBESPILE (AM 4328/2008) are registered trademarks of DYWIDAG-Systems International GmbH. Combi Coat and CT-Bolt are trademarks of Vik Ørsta AS. DYWIDAG-Systems International GmbH is a partner of Vik Ørsta AS. Austria Argentina Australia belgium Bosnia and herzegovina Brazil Canada Chile Colombia Costa Rica Croatia Czech republic Denmark Egypt estonia Finland France Germany Greece GUATEMALA HONDURAS Hong Kong Indonesia Italy Japan Korea Lebanon Luxembourg Malaysia Mexico Netherlands Norway Oman Panama Paraguay Peru POLAND Portugal Qatar Saudi Arabia singapore South Africa Spain Sweden Switzerland Taiwan Thailand Turkey United Arab Emirates United kingdom Uruguay USA Venezuela /04.13-web-he