RU85500U1 - PLATE AND PILED BASE - Google Patents

Abstract

1. Slab-pile foundation, including a reinforced concrete slab-grill with through holes and piles located in them with a gap monolithic concrete, characterized in that the piles are placed in the holes of the slab-grill with a depth of not more than 0.1-0.15 the thickness of the slab-grill with the possibility, during the construction of the building, the vertical movement of the slab-grill by 20-80% of the maximum permissible settlement of the building relative to the piles, followed by monolithic holes and gaps with concrete flush with the surface of the slab-ros Verka and the completion of construction of the building. ! 2. The plate-pile foundation according to claim 1, characterized in that the walls of the through hole of the grillage plate are made with horizontal ribs. ! 3. The plate-pile foundation according to claim 1, characterized in that the through hole in the grillage plate is made in the form of a bell with a square section in the upper part of the plate and a cross-shaped section in the lower part of the plate.

Description

The utility model relates to construction, namely to the construction of plate-pile foundations.

A known construction of a slab-pile foundation containing a reinforced concrete slab-grill with holes and reinforced concrete piles located in them, installed with a gap from the walls of the hole, which is subsequently monolized with a solution while squeezing the grill-slab with spacers (SU No. 920114, class E02D 27/12 Publ. BI No. 21 dated 06/07/87.).

A disadvantage of the known construction of the foundation is the complexity of its construction due to the need to use spacers and the large material consumption of the grillage plate.

The closest design to the proposed one is a slab-pile foundation, including reinforced concrete slab-grillage with through holes and piles located in them with a gap, monolithic concrete. (RF patent No. 2305154, class E02D 27/12, publ. 08.27.2007).

The disadvantages of the known design are the need to use a two-layer slab-grillage due to the significant total settlement of the building, which leads to increased material consumption of the foundation, as well as the unpredictable load distribution between the grill-slab and piles and the need for an excessive amount of piles.

The technical problem is to reduce the cost and material consumption of the foundation due to the optimal load distribution between the grillage slab and piles, with a decrease in the load on piles and a reduction in the number of piles, as well as the possibility of using a single-layer grillage slab.

The problem is solved in such a way that in a slab-pile foundation, including a reinforced concrete slab-grill with through holes and piles located in them with a gap monolithic concrete, according to a utility model, piles are placed in the holes of a slab-grill with a depth of not more than 0 , 1-0.15 thickness of the grillage slab with the possibility, in the process of building construction, of vertical displacement of the grillage grill by 20-80% of the maximum permissible settlement of the building relative to the piles with subsequent monolithic holes and concrete gaps flush with the surface of the grillage slab and completion of the building. The walls of the through hole of the grillage plate can be made with horizontal ribs. Or, the through hole in the grillage plate may be in the form of a bell with a square section in the upper part of the plate and a cross-section in the lower part of the plate.

The proposed foundation differs from the known one in that the piles are placed in the holes of the grillage slab with a depth of not more than 0.1-0.15 thickness of the grillage slab with the possibility of subsequent vertical movement of the grillage grill by 20-80% the maximum permissible settlement of the building relative to the piles, followed by monolithic holes and gaps with concrete flush with the surface of the grillage slab and completion of the building.

When erecting a part of the building on a grillage slab, it is loaded until the draft reaches 20-80% of the maximum permissible building settlement determined by calculation, which ensures optimal load distribution between the grillage slab and piles. The grillage slab is single-layer with holes in which the piles are driven to a minimum height sufficient to absorb bursting loads when filling the remaining free part of the holes and gaps with monolithic concrete after settling the grillage.

In cases when the thickness of the slab-grill is determining its work on punching piles and adhesion of concrete monolithic to the vertical walls of the holes is not enough, the bearing capacity of the connection can be increased by making the wall of the through hole of the grill-plate with horizontal ribs. And also by making a through hole in the form of a wedge-shaped bell with a square section in the upper part of the plate and a cross-shaped section in the lower part of the plate, formed due to the inclination of the forming faces.

Figure 1 shows a plate-pile foundation; figure 2 is the same as in figure 1 after the construction of part of the building; figure 3 is the same as in figure 1 after the construction of the building; figure 4 - node And figure 3; figure 5 - 1-1 figure 4; Fig.6 is the same as in Fig.4 (option 1 through hole); Fig.7 - 1-1 Fig.6; Fig. 8 is the same as in Fig. 4 (embodiment 2 of the through hole); Fig.9 - 1-1 Fig.8; figure 10 - 2-2 figure 8.

The pile-pile foundation includes piles 1, a grillage plate 2 made with through holes 3, in which piles 1 are placed with a gap and a free part of the holes monolithic with concrete 4. A part of the building is erected on the foundation 5. The heads of piles 1 go into the holes 3 of the plate - drill 2, which is sufficient to fix the coaxial position of the piles relative to the grillage plate.

The pile-pile foundation is erected as follows.

After the device is installed in the soil of piles 1, a reinforced concrete slab-grillage 2 is made with the formation of through holes 3 coaxially erected piles 1 with a size slightly larger than the cross section of the pile. The vertical walls of the holes 3 are performed either according to option 1 with protruding horizontal ribs (see Fig.6, 7), or according to option 2 in the form of a wedge-shaped bell (see Fig.8, 9, 10). The heads of the pile 1 are placed in the holes 3 with the institution to a height corresponding to 0.1-0.15 thickness of the plate, which provides a stable fixation of their position. Then, on a grillage slab 2, as part of a building on a natural foundation, part of building 5 is erected until the slab settlement reaches its design value of 20-80% of the maximum permissible draft for the building. After that, the grillage slab 2 is combined with piles 1 by monoling the holes of the grillage slab with concrete 4 flush with the surface of the grillage slab and the construction of the remaining part of the building is continued.

The proposed foundation allows under various soil conditions to minimize the load transmitted to the pile part of the foundation and reduce the number of piles within the limits of permissible deposits for the building, as well as to abandon the construction of a two-layer grillage slab.

Claims (3)

1. Slab-pile foundation, including a reinforced concrete slab-grill with through holes and piles located in them with a gap monolithic concrete, characterized in that the piles are placed in the holes of the slab-grill with a depth of not more than 0.1-0.15 the thickness of the slab-grill with the possibility, during the construction of the building, the vertical movement of the slab-grill by 20-80% of the maximum permissible settlement of the building relative to the piles, followed by monolithic holes and gaps with concrete flush with the surface of the slab-ros Verka and the completion of construction of the building. 2. The plate-pile foundation according to claim 1, characterized in that the walls of the through hole of the grillage plate are made with horizontal ribs. 3. The pile-pile foundation according to claim 1, characterized in that the through hole in the grillage plate is made in the form of a bell with a square section in the upper part of the plate and a cross-shaped section in the lower part of the plate.