CS237804B1 - Reinforced foundation and method of its production - Google Patents

Abstract

The purpose of the invention is to design a structure and a method of manufacturing a gravel-suspension foundation. The foundation consists of a shaft reinforced with a connecting supporting structure anchored to the foundation head. There is a cover layer between the shaft and the head. The shaft is made of hardened self-hardening suspension and natural aggregate. The foundation is manufactured by inserting a connecting supporting structure, natural aggregate into a borehole or shaft filled with self-hardening suspension before it begins to solidify, and after the self-hardening suspension has partially hardened, a cover layer and a head are manufactured. The foundation is suitable for manufacturing where the bearing capacity is low, the groundwater level is high, and where the borehole or shaft needs to be lined. The economic effect is achieved by the fact that the same material that forms the lining of the borehole or shaft forms part of the foundation. For manufacturing a foundation in complex geological conditions and on small-scale constructions, it is possible to effectively mechanize the work.

Description

237804

The invention solves the reinforced gravel-suspension base and its manufacturing methods.

Underground structures are known which are produced by casting a slurry into joints in combination with plastics foils, aggregates and prefabricates.

Foundations of superimposed concrete are known. The individual stones do not exceed 1/3 of the smallest dimension of the structure nor exceed 400 mm. The stones must be evenly distributed throughout the structure. The stones embedded in the sanes construction can meet with reinforcement or with other objects embedded in the structure. The inserted stones are pushed or squeezed into the concrete already compacted about half their height. The construction of the concrete mix should be such that there is no excessive descent of the embedded stone during compaction.

Basement constructions consisting of stone and cement injection materials are known. An injection tube and aggregate are deposited in the borehole or shaft. The hollow cavities are lined with cementitious injection material delivered to the bottom of the borehole. The injection tube remains in the permanent position or is drawn during injection washing machines.

The disadvantage of reloaded concrete and pre-dyed aggregate is their application in the geological conditions, where the groundwater level is below the base level and where the chisel or groove wall is not required to be lined. The production of the translated concrete is very laborious and is not currently used in building organizations. A further disadvantage of the base structure made of aggregate and the injection mixture is the possibility of not filling all cavities with a filler and a connecting matrix.

The basis of the reinforced base is that it consists of a shank, a cover layer, a head and a connecting support structure. The base layers consist of a hardening of the self-curing suspension and the natural crushed or pulled aggregate. such as PVC and the like. The head is made of monolithic or prefabricated reinforced or unreinforced concrete. The connecting supporting structure is made of prefabricated reinforced concrete or of reinforced or rolled steel. The joining structure connects the shank, the covering layer and the base of the foundation to one unit while reinforcing the base shank.

The reinforced gravel-slurry base is formed so that the well or shaft is shirred by the presence of the self-hardening suspension. The hardening slurry is still being filled during the drilling of the borehole or shaft. The level of suspension is maintained at a height that guarantees the stability of the well or well walls. The projection depth is inserted into the borehole or shaft and the joining structure is fixed so as to reinforce the base shank with its lower part and protrude above the cover layer for the concrete structure with its upper part. Prior to the solidification of the self-curing suspension, natural aggregate is deposited in the borehole or chess shaft to a height such that the layer of the self-curing suspension without the cage is at least 10 cm high. The resulting self-hardening suspension is pumped out during the deposition of the aggregate and used for the drilling of another well or shaft. The cover layer is formed at a time when the self-curing suspension has attained a minimum strength of 0.05 MPa. It's asiv from days 3 to 6 of deepening. After the surface of the cover layer has been leveled, the base of the base can be made immediately. The foundation head can also be made after the cover layer has hardened.

In particular, the benefits of a reinforced pebble-bed base consist in the fact that a substantial part of the concrete is replaced by a hardened mass of self-hardening sus-pens and natural aggregates. The same space that hardens the borehole or shaft for the duration of the depression after the aggregate is deposited and forms a solid building material of the base shank. In the case of required higher strengths in simple pressure, the stem of the base is self-reinforcing. The advantage of the method of production is the simplification by the fact that in geological conditions with a high level of groundwater and where the borehole of the borehole or shaft is needed, the sheeting mass becomes part of the foundation together with the additionally deposited stone, possibly also with a stiffening structure . A higher effect is also achieved by the fact that it is not necessary to set up a concrete mixer plant at an early stage of construction, with all work on the base of the foundation being mechanized, so that a high productivity of labor with low labor intensity is achieved even with low-scale construction works. An example of a reinforced gravel-slurry base and method of manufacture are shown in the accompanying drawings, wherein FIG. 1 shows a reinforced gravel-slurry base. FIG. Figures 2 to 6 show vertical sections showing the method of manufacturing this foundation. Fig. 2 shows the end of the borehole or shaft depth below the self-curing suspension. Fig. 3 shows the stiffening of the reinforcing structure so as to protrude above the surface-hardening suspension. FIG. 4 shows the deposition of natural aggregate in a drill or shaft. The shot must be immersed in the self-hardening suspension at a minimum depth of 10 cm. After partial hardening of the self-hardening suspension, the covering layer, as shown in Fig. 5, is spread, whereby the stiffening structure protrudes above the covering layer on the anchoring length. Fig. 6 shows a finished gravel-suspension base with a head.

Claims (3)

The reinforced gravel-suspension base consists of a shank 1, a cover layer 6, a head 5, a base and a bonding support structure 4. The base shank 1 is formed of a cured self-curing suspension 2, a natural stone 3 and reinforced with a support structure 4 which simultaneously joining the shank 1 with a shim 5 while transferring the sheath 6. The production of the reinforced gravel-slurry base is such that the well or shaft 10 is agitated in the presence of a hardening slurry. the shaft 10 is still refilling. The level of the self-hardening suspension 11 is maintained in an elevation which guarantees the stability of the well walls or wells 10. After the desired depth has been reached, a bonding support structure 4 is inserted and fixed into the well or well 10 with the hardening slurry 11 so as to reinforce the shank 1 with its lower portion. and with its upper part protruding above the covering layer 6 onto the anchoring length needed for the concrete structures. Prior to the solidification of the self-curing slurry 11, natural crushed or pulled aggregate 3 is further deposited in the borehole 10 to a height such that the layer of self-curing suspension 11 without aggregate 3 is at least 10suspension 11 during storage of the aggregates. The emerging self-hardening3 draws off and, in the liquid state, uses a further bore of the borehole or shaft 10. The cover layer 6 is produced at a time when the hardening suspension 11 has reached a minimum pressure-free strength of 0.05 MPat. on the 3rd to 6th day after excavation of the borehole or well 10. After the surface of the covering layer 6 has been leveled, the head 5 can be produced immediately. - construction of light industrial, civic and residential buildings on a low-load, high-level subsoil with a relatively high level of mechanical construction machinery. PRÍDMET A reinforced base characterized in that its stem (1) is a cured self-curing suspension (2) and a natural aggregate (3j is reinforced by a connecting support structure (4) anchored to the head (5) of the base, between the shank (1) and the cap (5) is a cover layer (6). 2. A reinforced base according to claim 1, characterized in that the connecting support structure (4) is made of prefabricated reinforced concrete and / or concrete or rolled steel. 3. A method for producing a reinforced base according to clauses 1 and 2, characterized in that a sloping support structure and a natural stone are inserted into the shaft filled with the self-curing suspension and at the beginning of the solidification, and after the hardening suspension is partially hardened, a cover layer ahlavica. 2 sheets of drawings