IL34532A

IL34532A - System for the deepening of the bottom in front of moles and retaining walls of marine and river installations and the re-inforced moles so obtained

Info

Publication number: IL34532A
Application number: IL34532A
Authority: IL
Original assignee: Chitis W
Priority date: 1969-06-12
Filing date: 1970-05-14
Publication date: 1972-10-29
Also published as: DK133393C; FR2048411A5; SE377351B; ES379266A1; ZA702888B; NL7007694A; DK133393B; DE2022967A1; BE749559A; GB1289775A; CA934560A; YU34445B; YU123170A; IL34532A0

Description

SYSTEM FOB THE DEEPENING OF THE BOTTOM IN FRONT OF MOLES AND RETAINING WALLS Oii E AND RIVER INSTALLATIONS THE MOLES SO OBTAINED In the expansion plans of sea or river provision is often made for the deepening of the bottom adjacent to the moles to make them suitable for the docking of large tonnage The said deepening of the bottom inevitably involves the problem of avoiding endangering the stability of the mole or retaining wall concerned and for this purpose i is necessary to rebuild the existing moles or to build new ones in front of those already This obviously creates a double an Economic because of the high cost of the project a functional one in that in the case it reduces the area of water in front of the moles and therefore the efficiency of the these should be added the fact that often the existing port facilities can no longer be The present invention consists of the carrying out of operations reinforcing the outer retaining make them suitable for incorporation in the forecast future balance system which exists following the deepening of the The procedure consists of carrying through the existing wall appropriately inclined These borings pass through the walls of the mole and key into the ground Into the so obtained units are forming a curtain of poles extending into the A screen is then built on the water side of the walls or this v According to a further feature of the invention cement material is cast under pressure during the struction of the so as to a part of the cement material to penetrate the interstices of the riprap of the and into the ground below the mole or in order to form a single solid These and other features of the invention will become clear from the following description which is illustrated in the drawing and which is given as an example The attached drawing shows a vertical perpendicular to the wall of the of the works involved in the invention which consist essentially of boring 1 carried out diagonally in the cement caissons and structure usually form the outer retaining and which extend fanwise in a downward The borings continue in the riprap 3 of the water foundations on which rests the structure proper 2 of the retaining wall and which then extend appropriately into the ground Successively in the through holes so with the insertion where necessary of appropriate fillings are introduced which may be posts 5 prefabricated in the or alternatively posts 5 cast in situ orced when which extend into the The fillings may be of wood or reinforced The cement casting in the stretch in which it passes through the riprap 3 expands into existing interstices due to the pressure of the sement cementing together these into a single solid concrete In addition to the oned a scree 6 is built along the foot or extension of the existing wall of the structure to a precalculated The screen may consist of a continuous concrete or alternatively of a number of posts side by side or fixed The purpose of this screen is to retain the ground immediately below the existing wall and to protect it front the action of the deep water in the new The screen 6 has no basic support function because the reinforcing elements on the one hand absorb directly the load of existing wall 2 and on the other reinforce the ground and cement together with the riprap so eliminating thrust The screen 6 can in turn be bound at the for example in to the structure of the retaining wall 2 superimposing itself for a certain length up it so as to form a horizontal reinforcing band Once these reinforcing operations have been carried the poles 5 and the screen work can proceed in the excavation of the bottom to the depth designed in complete safety both as regards the stability of the retaining wall and the possible baring of the earth at the base of the uncovering pf which is avoided by the cementing carried out in the building of the poles 5 insufficientOCRQuality

Claims

In the attached Pig. 1 arecalso indicated by 9 the average sea level, and by 10 the old bottom with a dotted line. C L A I S :

1. A method for deepening the bottoms in front of moles and retaining walls in marine, river or lake installations characterised in that through the existing wall structures appropriately inclined borings are made which pass through the walls of the structure and key into the ground below, whereafter fillings are introduced into the holes so formed, which fillings form a curtain of poles extending into the ground, after which a continuous screen isbbuilt on the water side of the moles or walls, the said screen being fixed at its upper end to the base of the existing walls of the structure and extended downwards to the appropriate depth*

2. A method as in claim 1 , characterised in that during the construction of the poles, cement material is cast under pressure so as to cause a part of the cement material to penetrate the interstices of the riprap of the under-foundations and into the ground below the mole or walls in order to form a single solid block.

3. A method as in claim 1, characterised in that fillings are cast in situ in concrete, reinforced when necessary*

4. A method as in claim 1 , characterised in that the fillings are pre-fabricated (in steel, wood or reinforced concrete) and subsequently inserted into the ground below through the holes already made, and which are subsequently cemented,

5. A method as in claim 1 characterised in that the screen 6t the foot of the mole or walls is built in situ of concrete, preferably reinforced, in the form of a series of posts in contiguous borings, or by a continuous wall.

6. * A method as in claim 1, characterised in that the screen is pre-fabricated in wood, steel or reinforced concrete and subsequently fixed in place.

7. A method as in claim 1, characterised in that the screen is completed in its upper portion by a continuous capping in reinforced concrete.

8. A method as in claim 1, characterised in that the screen meets and is bonded with, in its upper portion, the existing mole or retaining wall.

9. * A mole built by the method as in claim 1 , characterised in that it comprises the existing wall structures with appropriately inclined borings which fan out into the ground below and which are filled with devices such as poles cast in situ or pre-fabricated and a continuous screen on the water side which is joined at its upper end to the base of the existing wall system and which extends downwards to approach the re-inforcing poles* )/