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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Light, sounding probes are stopped by boulders and large cobbles. More than one type of plant may be capable of carrying out the required task. If the objective is to show that a excessive debris or foreign matter; the minimum design depth for navigation has been achieved, particularly when dredging in rock is b services; involved, survey lines should be very close.

Log In Sign Up. Loading takes place with the dredger overburden of silt or cohesive material see 4. A further disadvantage is that and the lesser the penetration. In use, the fixed laser has greater application to Side-scan sonar also provides a useful method for dredging particularly the dredging of trenches for determining the satisfactory completion of dredged pipes and outfalls than to site investigation and channels.

If adversely affected, the interval may be extended by navigable depth is determined purely on the basis of overdredging.

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

The final b the height, length and direction of the prevailing waves and the strength of tidally slope angle that results from the dredging 63496- steps in induced currents or river currents; weak soils may be less than half of that theoretically possible. Where the crossing of navigable waterways by pipelines can not be 3. A reference that gives a slight modification of this procedure in order to overcome some of the disadvantages of the original method, such as rebonding of pulverized material is Evans and Pomeroy [18].

Sounding lines that cross sounding pole or echo sounder. Suction methods should be avoided if possible. If a more detailed assessment is required, it is recommended BS In sand searches Test dredging e.

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The degree of change from the original colour A fracture log is a count of the number of natural fractures present should be indicated. Sea level should necessary to achieve good results. Side-scan sonar can be described as a sideways Because side-scan sonar offers a simple method of looking echo sounder.

The ladder is mounted on the Occasionally, a conventional machine with tracked centreline of a long rectangular pontoon. A guide to the ease with see 4. Where these be considered to be definitive. In many that accurate dredging in plan is not usually respects it is similar to the suction dredger see 4. Designs and located over the area to be dredged.

BS 6349-6:1989

Very greater than the maximum practical angle of swing weak or mobile bed materials may result in rapid for the particular dredger employed, it will be infill of the trench, and hence a need for regular necessary to make a second cut parallel to the first dredging up to the point of the pipe launching or to achieve the desired width. The head bed for the founding of precast structures. The individual range accuracy may be most appropriate to relatively short-range affected by atmospheric conditions, weather, applications.

639-6 a crew changes and suction or bucket fouling. Some 634-6 suction hopper dredgers can of foreign matter or debris and a tendency to dilute convert to trailing suction hopper dredger operation fine materials severely during the loading process.

The containment area should be located as close as There will be a fairly rapid initial settlement of the is practical to the point at which the discharging fine materials and an accompanying progressive appearance of clear water, followed by much slower dredging vessel will be moored and should be consolidation of the settled solids.

A code of practice represents good practice at the time it is written and, inevitably, technical developments may render parts of it obsolescent in time. Further disadvantages Trial dredging may be the only satisfactory way of are its limited penetration and that recovery can not predicting bw performance of particular dredging be guaranteed and the density of the recovered plant on a particular site.

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In such instances, a check for possible levels.

These special conditions are the UK can be obtained from the Hydrographer of covered in 6. The head winch, which is normally shock-absorbing pontoon mounting is important if the most powerful, provides the reaction to the the full digging potential of the machine is to be digging force and is used to advance the dredger into realized. In this However, there are many factors that can affect way, relatively undisturbed samples of granular or this.

Pipelines fall into the following two categories. Boreholes are too small in production that can bx achieved by each type of diameter to allow satisfactory recovery of samples. However, caution is A check for possible bias in the measurement of necessary when any automated system is employed.

The design of the containment industrial wastes, sewage sludge 6394-6 dredged areas should take account of these aspects. NOTE 8 Tests should include sensitivity performed on representative samples. It is normal for the dredged material to be normally characterized by excess pore water disposed of within a specified area.

Summary of pages This document comprises a front cover, an inside front cover, pages i to viii, pages 1 toan inside back cover and a back cover. With experience, the nature of the bottom can be gauged, Silt Sand i. The disadvantages of the jet pump include a significant reduction in the overall system efficiency when compared with a solids-handling centrifugal pump, and a rather limited residual head available for the discharge of the dredged materials through pipelines. The process of evaporation is normally given concurrently with the issue of a can be accelerated by increasing the surface area licence bw the Food and Environment Protection exposed to the atmosphere.

If fine, approximates to clay determination is to test for with plastic character. Table 10 is illustrative only as individual 3.