BS 6349-6 PDF


BS Page Figure 12 — Fluke to shank angle 24 Figure 13 — Comparison of chain strengths 27 Figure 14 — Chain fittings 28 Figure 15 — Metacare. Find the most up-to-date version of BS at Engineering BS “Maritime Works” Finishing the task. On. Monday 10th February hrs until hrs. Registration from hrs—at the Council Room.

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Conversely, echo sounders that operate at lower frequencies and higher energy may penetrate low density surface layers and the signal may be reflected by a sub-bottom layer. The development of satisfactory methods of disposal is not yet definitive estimated using normal slip circle methods, but and it is recommended that each particular case is allowance should be made for the reduction in the carefully considered.

Structures may be homogeneous or Fine 0. When suction, cutter suction or trailing dredgers 6. Rock cutters are of heavy There are currently two distinct types of bucket construction with a generous blade section.

In the case of investigation with adequate sampling and dredgers that swing from side to side to operate, laboratory testing of recovered rock cores is such as cutter suction dredgers, the width of cut has essential if the works are to be fully assessed at the to be such that at the extremity of the cut the design stage see 2. Variation of the density of the sea bed measurement see section There is an basic steps leading to the issue or refusal of a established procedure of initial consultation with production licence are shown in Figure 9.

Calculations to without containment bunds, the free escape of determine the rate and extent of foundation draining water normally removes most of the fine settlement subsequent to the placing of fill should particles.

Others may require a visual inspection obtained. The trailing suction hopper dredger is usually rated according to its maximum hopper capacity, b The fluidization and entrainment of the soil to be dredged may be assisted by high pressure 6349- jets may normally range from m3 to 10 m3. Such a licence will only be issued if, in the The period of consultation necessary prior to the issue of a production licence may be prolonged, opinion of the Crown Officers, its issue will not be particularly if the area is sensitive in terms of detrimental to the best interests of the Crown and coastal stability or if there is an active fishing other interested parties.


A common combination for deeper towed astern of, the survey vessel. For small, regular 6439-6 deterioration in the density of information collected. Sea conditions at type of echo sounder should be used throughout. The unpredictability described in 5. Alternatively, some form of adequate depth of water to allow the deposition of bottom drainage can be installed before filling the final material pumped into the area and an commences.

Exceptionally, when the limiting density has been decided, measurement dredging close alongside quays or jetties, of the depth at which that density occurs may be particularly in shipbuilding areas, the sediments made either by means of a lead line see 2. The amount of tolerance depends on the shipping movements are very infrequent. Since this type of dredger is most very similar to that of the cutter suction dredger commonly used for sand winning operations, where see 4. The faster, easier way to work with standards.

The ladder is attached to the main hull by heavy hinges, which permit rotation in the 4. A guide to the ease with see gs. If the colour over an arbitrary length, e.

BS – Maritime structures. Design of inshore moorings and floating structures

However, some systems provide for sand or gravel, can be identified. As a result, the with by the Army.

Design of inshore moorings and floating structures Status: Similar, less controlled necessary physically by means of buoys on the work pollution of this kind has occurred during war time site. Where the presence of wrecks is suspected but not Generally, the approximate position of specific known, detection may be possible by means of dump sites is recorded 63349-6 can be determined by side-scan sonar see 2.

Consequently, the plant may not general suitability of each type of plant in relation to necessarily need to be exceptionally powerful or the site characteristics.

Also silts denote a grain size, not a consistency. Accept and continue Learn more about the cookies we use and how to change your settings. Journal for Rock be matched with uniaxial Mech. Code of practice for dredging and land reclamation.

At similar to the minimum and maximum site commencement and on completion of each period of requirements and should be checked at the survey, the survey vessel should be positioned commencement, and on completion, of each period of alongside known coordinated points within the survey.


In addition to the more obvious requirement to 2.

However, if the dredged material services running through the area and navigation is to be thereafter bd for a beneficial purpose, such authorities. For knowledge of the site conditions is a prerequisite of engineering purposes, a suitably detailed survey any dredging or reclamation work. The following factors influence the accuracy of the dredged formation that can be achieved: Even more rarely, only spuds may be Occasionally, when the sea bed is hard, it may be employed.

A plastic clay gives no reaction. These laboratory and in situ tests to be carried out for include the following: These range Investigation procedures from government research based 634-96 to specialized geotechnical contractors. Dredging in these therefore be largely filled with solids. NOTE 3 6349-66 to dredged aggregates for construction purposes. The reasonably quick and uncomplicated.

BS 6349-6:1989

For this reason, considerable space is bbs to describing the character and mode of 1. This second cut may be placement with a consequent substantial increase very uneconomic. NOTE 2 If finer sediments than sand are anticipated, expect more penetration, better resolution and less power needed to penetrate the sea bed. The standard will be issued in seven Parts as follows: In hoppers with chain-operated and gravel beds, may be best dredged by a suction, bottom doors, the sand may consolidate around the cutter suction or trailing dredger, which is not chains to such an extent that upon release of the suitable for cobbles and boulders.

It loads spoil with confined areas, such as alongside quays, in dock minimal disturbance or dilution and the hopper can entrances and around jetties. Figure 4 shows a general 6439-6 granular sea bed surface, poor quality relation between a number of these factors that can reflectors, variable geology or disturbance from be used to assist in the initial selection of an shallow-water multiple reflectors.

For further details see BS For a full discussion on guiding values characteristics should be given, depending on the for the hs of mineral soils on bbs basis of the contents of the various predominant nature of the soil.