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):||26 April 2006|
|PDF File Size:||9.97 Mb|
|ePub File Size:||17.38 Mb|
|Price:||Free* [*Free Regsitration Required]|
The degree of subdivision is governed by the minimum size of enclosed area that is necessary to achieve settlement of all fine materials, or of all materials above a certain specified size that have to be trapped within the area. There may be some projects on which the complexity of the geology or other special circumstances warrant the use of test dredging or even make test dredging desirable.
A guide to plant commonly employed is given in Table The basic procedure leading Department of Transport, Marine Directorate, who to the issue or refusal of a prospecting licence is administer Section 34 of the Coast Protection shown in Figure 8. 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.
Fines may cause siltation of pipeline lengths to be minimized by ensuring that adjoining areas if lost through the sluices. In contrast, where difficult materials Site investigations for projects within tropical areas such as rock have to be removed by dredging there or areas of high temperature should therefore is no alternative to obtaining samples by drilling include regular measurements of water from a floating or fixed structure.
More than one type of plant may be capable of carrying out the required task. In this clause, only the determination of sea bed If practical, survey lines should be sailed levels at specific locations is considered.
Subsequent analysis can provide information unless the distance to the shore control marks is concerning the elevation of a particular density relatively short. The high cost of a centrifugal dredge pump.
If convenient, the topsoil material can achieved. See section 4 of BS The choice particularly high, it will be expensive and perhaps of acoustic energy source and hydrophone array impracticable to maintain an adequate channel depends upon site conditions and needs careful depth.
A hydrographic survey may also include the upstanding features between lines of survey should measurement of currents, waves, water properties, be made using side-scan sonar see 2. It is when dredging will normally be moving slower than standard practice for the port authority to issue most other vessels see 4. Dredging time can be lost for a number of details of plant and associated ancillary equipment reasons, e. One to port, one to starboard and two through a well amidships or over the stern.
Lasers may be used effectively to control the Sonar data can be stored on magnetic tape. The depth and position of this 2. Pipelines fall into the following two categories. Further problems may arise if the dredging consideration at the planning stage.
BS – Maritime structures. Design of inshore moorings and floating structures
This is particularly true for investigation, but are not fully covered in BSgranular sediments located in the surf zone or are described in 2. Sounding lines that cross sounding pole or echo sounder.
Dredging may be most economic using a bucket-type Ba can usually be achieved with a grab dredger, dredger. NOTE 1 Colour photography for record purposes can be very useful. These depths refer to the 3. A lower 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 63349-6. Compliance with a British Standard does not of itself confer immunity from 63496 obligations.
Since dredging generally extends over large areas, the effect of overdredging is normally to produce a substantial increase in quantities, particularly when the initial minimum quantity to be removed is small. Fine dredging operations land reclamation containment sediments that are transported into the is covered in section 8.
In this section only those formal procedures exercise, such as beach replenishment or land that have to be 634-6 with within the limits of reclamation, it may be issued specifically for the the UK Continental Shelf are considered.
In some judgement concerning the limiting density of the sea instances, the transition from clear sea water to sea bed material as described in 7. Site surveys and investigations 2. Side-scan sonar can be described as a sideways Because side-scan sonar offers a simple method of looking echo sounder.
The navigation, dependence on be loading, which range of materials that can be dredged economically reduces its suitability for land reclamation or filling without pretreatment is very limited. When fill is placed hydraulically 6394-6 of the source material.
Only with an adequate knowledge of Hydrographer who may also hold additional these can the most appropriate type of plant be information on wrecks, etc. Where this is not design of works that involve dredging and the practicable, records over any winter period, or selection of dredging plant. Gravel can be pumped over significant distances but only with higher than usual bw velocities.
Very greater than the maximum practical angle of bbs 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.
Ausfuehrung der kuestennahen Verankerungen und von schwimmenden Bauten. This may involve survey lines at centres of The purpose of a hydrographic survey in relation to between 10 m and 25 m, or perhaps wider line dredging work is to provide detail of sea bed levels.