PORT WORKS DESIGN MANUAL PART 2Guide to Design of Piers and Dolphins Civil Engineering Office Civil Engineering Department The Government. Find the most up-to-date version of BS at Engineering Buy BS Maritime works. Code of practice for the design of quay walls, jetties and dolphins from SAI Global.
|Published (Last):||17 May 2018|
|PDF File Size:||11.4 Mb|
|ePub File Size:||12.8 Mb|
|Price:||Free* [*Free Regsitration Required]|
The submerged weight of underwater portions of the wall should be used in calculating the resisting forces.
BS Maritime works. Code of practice for the design of quay walls, jetties and dolphins
The strongpoint thus formed may be designed as a gravity structure. For certain specialized cargo such as ish, apron widths may be reduced to minimize handling, depending on the handling methods. The effects of lexibility in causing arching of the soil are shown in Figure 3b. Where the tie rod is not perpendicular to the wall, bending of the tie rod should be minimized by the use of spherical or tapered washers under the nuts or a bridle.
Delections of structures should be limited as shown in Table 1. The sliding resistance at horizontal joints with no shear keys depends on the type of surface inish on the top and bottom of the blocks.
Slurry 6349–2 construction should conform to BS Tie-bolts or other means are required to transmit the action from the wall to the waling. Limiting coeficients of friction between two plain surfaces of precast concrete units lie typically within the range 0.
Account should be taken of delections which might arise whilst backilling until the interlocks develop suficient friction to enable the full combined b to be developed. It is also possible to construct caissons on land or on a pontoon, by casting the minimum height of caisson required to allow it to loat, and then launching it. This should extend outward at least 1.
If long-term differential settlement is expected, keys between adjacent columns are omitted. NOTE For example, if ill is not easily available, it might be ba to construct a berth as a suspended jetty rather than a quay wall.
The piles should be designed to resist compressive actions due to berthing. The drains should be located above low water level to allow maintenance, and in such a way that they cannot be damaged by vessels or loating debris.
Code of practice for the design of quay walls, jetties and dolphins Status: If in-situ concrete is to be used within the tidal zone, members should be detailed so that the concrete can be easily placed and effectively compacted. The tie-backs should be designed to accommodate the settlement of the ground behind the wall resulting from imposed loads in addition to the effects of actions caused by berthing and mooring.
Blocks of about 15 t are likely to be the bd that will be used.
Overdredging tolerances typically 0. Arrises should hs chamfered to minimize mechanical damage. Two basic types of block are used in arch and buttress blockwork, one for the buttresses and one for the arches between. The capping should generally be at least 0. In secant pile walls, the piles are usually 1. Lifting points should be speciied.
NOTE 2 Guidance on earthing and bonding, and on ire-ighting equipment, at marine oil terminals is given in the International safety guide for oil tankers and terminals . Bonded blocks are often keyed to provide better interlock and to assist in placing under water.
Vs type of anchor may be connected directly to the embedded retaining wall or waling. If ixed access facilities are provided, they will also need to be maintained. A concrete cover of at least 75 mm should be adopted.
The lateral soil pressures acting on embedded retaining walls built in front of a relieving platform conforming to the geometrical arrangement shown in Figure 10a may be assumed to be relieved by the platform. Filling should be programmed so that the actions imposed on the wall can be resisted at each stage by the anchorage available at that stage.
Pre-stressed piles should generally be used in preference to reinforced concrete, to save weight. Offsetting currents can help a ship to leave the berth but might be unacceptable if a fully laden ship has to berth against them.