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.
|Published (Last):||14 August 2006|
|PDF File Size:||18.28 Mb|
|ePub File Size:||17.85 Mb|
|Price:||Free* [*Free Regsitration Required]|
A sb limit g the strength of tidal or river currents; below which no material may be removed may be h the extent of automated control of the specified if necessary. It is essential the fall velocity of the particles and the strength 63496- that these areas are insensitive to the effects of the direction of water flow during suspension. This may range from 0. Code of practice for dredging and land reclamation.
For regular maintenance dredging, the ranges of It is intended that these tables provide only a quantity to be dredged that are listed in Table 14 general guide to plant suitability.
General criteria; — Part If the various components of the Position is given by the simultaneous measurement measurement of position are not perfectly of two or more ranges with position being that of the coordinated in time, a source of error is established. Such areas may maintenance dredging is covered in 3. However, it is possible to draw some indirect conclusions.
BS – Maritime structures. Design of inshore moorings and floating structures
Since this type of dredger is most very similar to ba of the cutter suction dredger 3649-6 used for sand winning operations, where see 4. A plastic clay gives no reaction.
One Trial dredging should also be employed in situations disadvantage is that refusal may occur on, for where there is no satisfactory conventional soil example, a thin bed of shells or equally unimportant investigation method that is capable of sampling the feature.
Discharge is discharge through long pipelines unless normally by means of a bottom dumping intermediate booster pumps are employed.
Both are mounted on spud-rigged pontoons to to 23 m3 for the largest dredgers. Please download Chrome or Firefox or view our browser tips.
Since the dredger has to rocks, can be dredged by the larger dredgers always advance into 3649-6 face, it creates sufficient provided that the maximum required dredging water depth in which to operate. These range Investigation procedures from government research based organizations to specialized geotechnical contractors.
The noun should be regarded as denoting the principal In this respect reference should be made to  which covers the constituent, i. The CEC take advice on the question of local work. The trailing suction hopper dredger is usually rated according to its maximum hopper capacity, which The fluidization b entrainment of the soil to be dredged may be assisted by high pressure water jets may normally range from m3 to 10 m3.
The precise tests will 649-6 related to the circumstances of the project and the specific requirements. High concentrations of flint cobbles or nodules, Boulders that have been left behind by a suction which may occur ns the surface of weathered chalk dredger, or that have been pushed to one side by a deposits, are highly abrasive and may cause mechanical dredger, may still have to be removed.
Where the object is to create the minimum depth-indicating instrumentation on board the water depth for the navigation of shipping, it is dredger; normally most appropriate to specify a level above f the rate of change of vs level; which all material has to be removed.
These density of these deposits is at a minimum at the may include overdredging or making some upper surface and increases with depth.
This thickness to a minimum. Some rocks may be material on to land or of forming land.
This is the ideal UK it is usual to use rather coarse material for situation, particularly when a balanced cut and fill beach replenishment, although in the Low can be arranged. NOTE 3 Dilatancy is the property exhibited by silt as a reaction to shaking. RQD is the sum length of all core pieces mm or Decomposed The rock is weathered to the longermeasured along the centreline of the core, expressed as a condition of a soil in which the percentage of core drilled.
If required, a noted that in inland waters and other suitable sea microcomputer can be interfaced to convert the bed positions, simple surveying methods may be ranges to X-Y coordinates, which can in turn be fed appropriate. Indirect estimations of the boulder and cobble content can be assisted by It is possible to do this by using a noun to denote the chief considering the mode of formation, composition of laboratory samples constituent of the complex soil and adjectives to denote and sounding results.
For general guidance see Figure See section 4 of BS With increasing rock strengths, the point will be reached when the rock can no longer be dredged economically without pretreatment. Strength is important if the produce a fairly uniform level bottom and a pipe is to resist high internal pressures and relatively high rate of production.
This may currently be up face. In the close to the area of reclamation. Although it is valuable to examine land Weak 1. Due to significant waves Wave height 0. The types of cutter are used.
However, caution is A check for possible bias in the measurement of necessary when any automated system is employed. All of the information gained from any prospecting work has to be supplied to the CEC. The lower the frequency, the lower is position. Similar considerations may apply for shipping to pass alongside the dredger, which in the case of ports with heavy ferry traffic.
The numbers in square brackets used throughout the text relate to the bibliographic dredging references given in Appendix C. Not only is the number of difficulties. The use of fine materials, It is usual to use only granular materials for land such as those arising from maintenance dredging in reclamation.
This permits Occasionally, when dredging rock, a ripper tine may an uninterrupted dredging operation with the result be substituted for every second or every third that higher overall rates of production are possible.
See clause 49 of BS 6349- The function of the bed-leveller can be best compared with that of the bulldozer or grader on land. Poor visibility may also cause operating problems as well means of identifying quickly those types of plant as increasing the risk of collision.
Such measures can land are be to the control and provisions of the include the use of a synthetic filter membrane. For example, a programme that has been repetitive survey of large areas positive benefits designed for use in the measurement of navigable may result. If this is to be achieved, the dredged material has to The success of agitation methods depends upon the be very fine with a low settling velocity and there distance through which suspended solids are have to be currents of adequate gs and transported and the area over which they are duration to transport the sediment out of the dispersed.