Modular system for the laying of underground and railroad and tram lines

1. A module of a system for laying railroad and tram lines, comprising:

a supporting slab having a substantially parallelepiped shape, the supporting slab having an upper surface and a lower surface; and

adjustable levelling devices;

wherein the supporting slab includes at least four peripheral housings, passing from the upper surface to the lower surface of the supporting slab, having closed lateral walls within the supporting slab, for housing the respective adjustable levelling devices, each one of the peripheral housings having a portion at the lower surface with a prismatic shape having a first base area and a portion at the upper surface having a second base area, the second base area being smaller than the first base area, each one of the peripheral housings having a jacket;

wherein each levelling device slides within the jacket at the portion at the lower surface of a corresponding peripheral housing; and

wherein a bedding mortar is filled within the portion at the upper surface of each peripheral housing for clogging the peripheral housing upon the corresponding levelling device.

2. The module according to claim 1 , wherein the jacket is made of PVC/PE.

3. The module according to claim 1 , wherein each leveling device has a sliding member and a supporting member, overlapped therebetween.

4. The module according to claim 3 , wherein the sliding member is made of PVC/PE and the supporting member is made of elastomeric material.

5. The module according to claim 1 , further comprising two or more rail-bearing blocks, each rail-bearing block having a main body, a fastening member for fastening a rail to the main body, and a bottom plate member at a base of the main body.

6. The module according to claim 5 , wherein the main body is made of concrete and the bottom plate member is made of elastomer.

7. The module according to claim 5 , wherein each rail-bearing block further has a polymeric outer coating made of rubber.

8. The module according to claim 5 , wherein the supporting slab further includes at least a pair of housings at the upper surface, each housing having a basin for housing a respective rail-bearing block.

9. The module according to claim 8 , wherein the supporting slab includes three or four pairs of housings with a prismatic basin depending upon a distance value of resting members of a rail.

10. The module according to claim 1 , further comprising a stabilizing member for stabilizing the supporting slab.

11. The module according to claim 10 , wherein the supporting slab further includes a central housing, passing from the upper surface to the lower surface, for receiving the stabilizing member.

12. The module according to claim 10 , wherein the stabilizing member has an outer jacket to be housed in the central housing, a tubular stem to be fastened to a ground and a deformable bearing interposed between the tubular stem and the outer jacket.

13. The module according to claim 12 , wherein said bearing has an outer layer made of steel, an intermediate layer made of rubber and an inner layer made of steel incorporating a bushing made of a material with low friction coefficient.

14. The module according to claim 1 , wherein the supporting slab further includes at least a pair of grooves at the upper surface, traverse with respect to a positioning direction of rails.

15. The module according to claim 1 , wherein the supporting slab further includes one or more topographic feedback members for positioning the supporting slab.

16. The module according to claim 1 , wherein said supporting slab further includes one or more seats passing from the upper surface to the lower surface, for inserting related jacks for lifting the supporting slab.

17. A system for laying railroad and tram lines, comprising a plurality of modules, each module including:

a supporting slab having a substantially parallelepiped shape, the supporting slab having an upper surface and a lower surface; and

adjustable levelling devices;

wherein the supporting slab includes at least four peripheral housings, passing from the upper surface to the lower surface of the supporting slab, having closed lateral walls within the supporting slab, for housing the respective adjustable levelling devices, each one of the peripheral housings having a portion at the lower surface with a prismatic shape having a first base area and a portion at the upper surface having a second base area, the second base area being smaller than the first base area, each one of the peripheral housings having a jacket;

wherein each levelling device slides within the jacket at the portion at the lower surface of a corresponding peripheral housing; and

wherein a bedding mortar is filled within the portion at the upper surface of each peripheral housing for clogging the peripheral housing upon the corresponding levelling device.

18. A method for laying a module, comprising:

providing a module including:

a supporting slab having a substantially parallelepiped shape, the supporting slab having an upper surface and a lower surface; and

adjustable levelling devices;

wherein the supporting slab includes at least four peripheral housings, passing from the upper surface to the lower surface of the supporting slab, having closed lateral walls within the supporting slab, for housing the respective adjustable levelling devices, each one of the peripheral housings having a portion at the lower surface with a prismatic shape having a first base area and a portion at the upper surface having a second base area, the second base area being smaller than the first base area, each one of the peripheral housings having a jacket;

wherein each levelling device slides within the jacket at the portion at the lower surface of a corresponding peripheral housing; and

wherein a bedding mortar is filled within the portion at the upper surface of each peripheral housing for clogging the peripheral housing upon the corresponding levelling device;

positioning the module on a ground;

performing an altimetric adjustment of the supporting slab;

positioning the levelling devices such that supporting members of the levelling devices are pushed in contact with the ground; and

filling the bedding mortar within the portion at the upper surface of each peripheral housing for clogging the peripheral housing upon the corresponding levelling device.