Shotcrete may be used for lining ditches and channels, paving slopes, constructing warped sections, and structural elements. Shotcrete may also be used for structural repairs. 4-5302 Before Work Begins. Before work begins, do the following: Review the contract to determine the areas and conditions in which shotcrete could be used.
Shotcrete Concrete Repair Method Statement Remove all distressed concrete from the affected structural area and a minimum of 20 mm behind the steel reinforcement. Sand blast substrate to remove loose concrete and to remove the corrosion in the steel. ...
Example method statement for excavation work. Method statement for excavations: (a) strip foundations (b) storm and sewerage to connect into existing manholes Site Details Contractor: The name and contact details of the contractor. Project name and site address: Insert relevant details. Site manager: Name, telephone number and email address.
Concrete Repair Method Statement (Structural Lifting, Shotcrete, Epoxy) Concrete repair refers to modification of structure which is damage in its appearance or serviceability. It also involves to restore the structure partly or wholly, the pre-existing characteristics of serviceability, load-bearing capacity and if necessary, to improve its ...
Apr 01, 2001· 2.1.2 Pan Mixers . All pan mixers work on basically the same principle []: a cylindrical pan (fixed or rotating) contains the concrete to be mixed, while one or two sets of blades rotate inside the pan to mix the materials and a blade scrapes the wall of the pan.The shapes of the blades and the axes of rotation vary. Figure 4 shows the different combinations of blade configurations and pan.
Same method as calculating skin friction on ... Shotcrete . Soil Nail Basics . 28 . ... on their websites must accompany that information with a statement that neither the entity or individual nor the information, as it is presented on its website, is endorsed by the State of Texas or any state agency. To protect the
This Shotcrete Safe Work Method Statement (SWMS) covers hazards and controls associated with the application of shotcrete. This SWMS covers High-Risk Construction Work (HRCW) controls related to: Mobile plant movement. Pressurised gas distribution mains or piping chemical, fuel or refrigerant lines energised electrical installations or services.
Fibers for Shotcrete Reinforcement: When fiber is called out, the Contractor shall provide fiber reinforcement meeting the requirements of §711-01. The Contractor shall add fiber reinforcement during batching at a rate of 1.5 pounds of fibers per cubic yard of shotcrete, using a method approved by the Regional Materials Engineer.
4.5.2 Shotcrete To Exposed Slopes 4.6 REMOVAL OF ROCKS AND OTHER BLASTING 4.7 EXCAVATION OF PITS AND TRENCHES 4.8 BACKFILLING OF PITS AND TRENCHES 4.9 FILLING GENERAL 4.10 FOUNDATION FOR FILLS 4.11 EMBANKMENTS AND FILL SLOPES 4.12 COMPACTION OF FILL 4.12.1 General 4.12.2 Compaction by Mechanical Plant
4.2 Generally, test specimens are obtained in situ when doubt exists about the in-place shotcrete quality due either to low strength test results during construction or signs of distress in the structure. Other uses of this method are to provide specimens for acceptance testing, construction control and to assess the condition, quality and uniformity of the shotcrete in accordance with ...
Withdrawn Rationale: This is a laboratory test method that covers the determination of the time of setting of hydraulic – cement mortars containing additives for shotcrete for comparison with control mixes containing no additives or to compare the performance of shotcrete mixtures which contain additives that produce rapid setting or rapid stiffening of shotcrete.
if the shotcrete was not cleaned in a similar method to the original finishing, a contrasting halo was created around the repair areas due to the finishing of the new shotcrete. The cleaning was completed without any unforeseen chal-lenges. The decision to use a cleaning method …
provides an experience-based method for the design of slope improvement works. Prescriptive measures items are developed based on experience of their successful application in the past, which have been tested in the field and refined with time, with emphasis given to proper detailing having regard to the lessons learnt from landslide studies. ...
E. Work Zone: The method of drilling selected by the specialty Contractor will depend on the site and ground conditions and owned drill equipment. Most soil nails are installed using small hydraulic, track-mounted drill rigs. However, adequate working area is required (minimum of 16 …
Note1: Risk Assessment & Method Statement must be approved by a Contracts Manager for activities agreed as high risk. All other RAMS must be approved by a competent person excluding the author. Safety Communication Quality Integrity TeamSpirit Caring Trust Pride CF 621-50 Version 1
The method is particularly adaptable to locations where high-velocity flow is not detrimental, but desirable, and the hydraulic efficiency of smooth surfaces is important. Review Section 4-90, "Concrete," of this manual for details about concrete production. When shotcrete is to be used, review Section 4-53, "Shotcrete," of this manual.
1.4 Method Statement The proposed method statement for the basement extension is outlined below: • Contactor to establish ground water level • Piling contractor to review all setting out as shown on the drawings to ensure minimum clearance dimensions are achievable, with particular reference to the exiting lower ground floor construction.
Concrete Repair Method Statement (Structural Lifting, Shotcrete, Epoxy) Concrete repair refers to modification of structure which is damage in its appearance or serviceability. It also involves to restore the structure partly or wholly, the pre-existing …
the dry-mix procedure. N early 20-40 % shotcrete and 75% fibers (in case of a fiber. reinforced shotcrete) are lost if dry mix method is carried out (Banthia et al., 2002). In. case of wet ...
submit to the ENGINEER for approval a method statement. The method statement shall include a comprehensive program for material testing and quality control covering all elements of the designed retaining structures. b) Manufacturer's certificates of compliance shall be submitted certifying that the materials used meet specification requirements.
shotcrete and mortar mixtures, and "shotcrete" to denote large-aggregate mixtures. The preferred term today for all gunned material is shotcrete, regardless of the aggregate size. c. Specialty shotcretes. While most shotcrete placed is the traditional dry-mix and wet-mix shotcrete, the use of specialty shotcretes has become common. The
The New Austrian Tunnelling Method introduced in the early 1960s was the premier prototype to use steel bars and shotcrete to reinforce the ground. With the increasing use of the technique, semi-empirical designs for (3) (Soil .
Shotcrete improves the tensile and shear strength of slopes, thereby reducing the chances of slope failure. Shotcrete application in slope stablization. 2.1.4 Grouting . Grouting is a technique of injecting a fluid grout into the rock mass to replace the air or water present in its fissures and cracks. The grout consists of a mixture of cement ...
Benching – Method of protection to prevent cave-ins by excavating the sides of an excavation to form one or series of steps usually with vertical or near vertical surfaces between levels. Cave-in – Separation of mass of soil or rock material from the side of an excavation or loss of soil from under a trench shield or supporting system and ...
report on Shotcrete Repair we have reached several conclusions. If the special provisions are followed closely shotcrete is a viable repair method for highway bridges. Good surface preparation and pre-wetting before shotcreting are critical to getting a good bond. Contractors quite often use the dry-mix shotcrete method, especially for small ...
shotcrete. Where corrosive conditions exist, galvanised or non-metallic mesh is recommended. 2.3.2 Strapping Strapping is sometimes used to extend the area of coverage of an array of rock bolts. This method may be suitable for restraining relatively large blocks. Straps are usually installed in a linear or grid pattern along the side walls or
Jun 12, 2014· Inside a test dome built using the pneumatic wedge method. 2 / 7. First, a number of flat rebar forms are laid out side-by-side on the ground at the building site, on top of a deflated plastic air ...
History. Shotcrete, then known as gunite, was invented in 1907 by American taxidermist Carl Akeley to repair the crumbling façade of the Field Columbian Museum in Chicago (the old Palace of Fine Arts from the World's Columbian Exposition). He used the method of blowing dry material out of a hose with compressed air, injecting water at the nozzle as it was released.