Abstract:
The invention concerns a method wherein tubes (T1, T2) capable of being mechanically assembled in predetermined final relative positions which consists in: producing on the assembling ends of the tubes, before they are assembled, individual insulating and sealing coats (R1, R2) shaped and dimensioned so that in said predetermined final relative positions the coats are uninterrupted or almost uninterrupted; assembling the tubes and filling, if necessary, the possible residual gap (i) between the coats with an adhesive or sealant. Preferably, a sleeve (M) made of a heat-shrinkable material is provided on the assembly zone. The invention is applicable to sea lines.
Abstract:
The invention concerns a fixed caisson type dike (1) partially immersed between an upstream sheet of water (3) and a downstream sheet of water (4) such that water flows beneath the dike. The downstream front part (AB) of the dike which is likely to be affected by the movement of water under the effect of the surge, essentially slopes downstream at an angle (α) at most equal to 60° and at least equal to 25° with respect to the horizontal line. Said dike is further improved by an upstream front profile (10) specially designed for increasing the effect produced by the downstream front profile and by the addition of a central chamber (11) greatly decreasing the vertical stresses. Said dike amplifies the phenomenon of damping during periods of high surge (T > 8 seconds) and limits the risks of resonance downstream generated by the interaction of the construction with the site to be protected.
Abstract:
The invention relates to the laying of a submarine pipeline at sea. The device used comprises a support or laying tower (10) which can be inclined in a variable manner. Said device is characterized in that it comprises a work station (51a) which is borne independently from the tower by a boat and which is advantageously displaceable in order to assemble the successive parts of the pipeline. The invention can be used to lay any type of pipe and to lay two pipes at the same time.
Abstract:
The invention concerns a method wherein tubes (T1, T2) capable of being mechanically assembled in predetermined final relative positions which consists in: producing on the assembling ends of the tubes, before they are assembled, individual insulating and sealing coats (R1, R2) shaped and dimensioned so that in said predetermined final relative positions the coats are uninterrupted or almost uninterrupted; assembling the tubes and filling, if necessary, the possible residual gap (i) between the coats with an adhesive or sealant. Preferably, a sleeve (M) made of a heat-shrinkable material is provided on the assembly zone. The invention is applicable to sea lines.