Prefabricated reinforced concrete fore shaft of multiple application

FIELD: construction.

SUBSTANCE: invention can be used in the construction of underground structures such as "wall in the soil", namely for arranging a fore shaft used while executing a monolithic trench "wall in the soil". The prefabricated reinforced concrete fore shaft consists of prefabricated reinforced concrete elements of the L-shaped section, connected by means of embedded metal plates. The fore shaft elements are connected by means of at least two keys engaged by toothings, the keys being reinforced. On the upper edges of the prefabricated fore shaft in the same plane with the concrete surface, metal embedding angles are mounted, which are anchored in the concrete.

EFFECT: increasing the stiffness, bearing capacity and reliability of the interface nodes of the prefabricated fore shaft elements, reducing the labour costs, improving the structure installation quality, ensuring its durability and maintainability, which guarantees frequent use of the fore shaft structure and significantly reducing its cost.

9 cl, 2 dwg

 



 

Same patents:

FIELD: construction.

SUBSTANCE: invention relates to the construction, namely to sheet pilings or retaining walls erected at the sites with free-flow current of ground water, in particular for the creation of sheet piling in foundation pits during conduction of repair works at major pipelines. Method for erecting the sheet piling when conducting works at major pipeline includes the assembly of the guide frame and lock in place of erection of sheet piling by driving the racks, installation of the guide frame on them and driving of sheet piles of fencing with their closure in plan. Repair foundation pit is excavated preliminary and major pipeline is opened on top to the depth not less than 0.6 m from the bottom forming tube of major pipeline to the bottom of foundation pit, besides the foundation pit is excavated along the length exceeding the length of the cut section of major pipeline to not less than 2 m. Repair foundation pit is bordered with the compacted clay along the exterior perimeter. Four racks are mounted in the corners of repair foundation pit with section protruding over the curve of repair foundation pit to not less than 15 cm, retaining fingers are inserted into the holes of racks and then I-beams of guide frame are mounted on racks, after that the sheet piles with formation along the perimeter of guide frame from I-beams of sheet piling are suppressed into the soil along the I-beams between the walls of repair foundation pit and I-beam. Part of sheet piles leaves not less than 15 cm over the curve of the repair foundation pit.

EFFECT: technical result consists in the increase of productivity when erecting and disassembling the sheet piling, reduction of material consumption of sheet piling, simplification of structure.

5 cl, 3 dwg

FIELD: construction.

SUBSTANCE: method to reinforce foundation pit and trench boards includes arrangement of a rigid L-shaped structure made as a vertical retaining wall with a collar protruding towards the foundation pit fixed along the wall top, soil working in the foundation pit, installation of anchors and their tensioning. At first anchors are installed on the collar and tensioned, besides, anchors are installed in direction parallel to wall reinforcement, and value of anchors tension is maintained at the calculated level, reinforcement movement start is recorded, afterwards soil is worked in the foundation pit (trench).

EFFECT: neutralisation of impact from compressed pressure and putting reinforcement in operation before soil working in foundation pit, exclusion or minimisation of horizontal displacements of the wall, increased bearing capacity of soil massif.

4 cl, 3 dwg

FIELD: construction.

SUBSTANCE: in method to excavate foundation pit when doing emergency works at subsurface structures including reinforcement of gap slopes, expanding, reinforcing and hardening material is injected into gap in unstable zone until complete filling of gap, and reinforced area is shaped in unstable zone by curing until full hardening of specified material, then soil is cut in layers, and a layer of expanded, reinforcing and hardened material is cut down to subsurface structure.

EFFECT: simplified technology of foundation pit slopes reinforcement and reduced time for its performance.

2 cl, 1 ex, 5 dwg

FIELD: construction.

SUBSTANCE: bracing of boards of a foundation ditch includes protecting and load-carrying wall structure connected with a fastening belt, executed on the top of protecting and a load-carrying structure. The fastening belt is executed in the form of the salient aside reinforced flange from a foundation ditch, located in an dimple of the fore shaft with possibility of rigid connection of a prefabricated reinforcement cage of a flange with the top exposed part of a prefabricated reinforcement cage of a wall structure and joints concreting this connection for increase in flexural rigidness.

EFFECT: increase in flexural rigidness of an upper part of bracing in a vertical plane for a full exception of horizontal moving of a load-carrying wall and a ground towards a foundation ditch.

4 cl, 2 dwg

FIELD: building, particularly foundation pits rammed by free-fall method.

SUBSTANCE: device comprises cylindrical part connected to section of circular truncated mouth cone. The section has base provided with base having flat ring extending transversely to longitudinal device axis. Cone section is parallel to base and faces free end of cylindrical part.

EFFECT: prevention of ground protrusion in pit and taper formation during pit ramming, provision of free ram removal from pit bottom and ram retraction in guiding shaft for following ramming cycle performing.

2 dwg

FIELD: building, particularly for bordering or stiffening the sides of foundation pits.

SUBSTANCE: method involves driving vertical piles in ground along pit perimeter for depth exceeding pit bottom level; excavating ground up to reaching pit bottom level to open bordering member surfaces facing inwards; securing horizontal distribution beams to above surfaces to create framing belt; installing spaced cross-pieces along pit perimeter; leaning the first cross-piece ends against distribution beams and securing the second ends thereof into pit bottom ground; removing cross-pieces after reinforced concrete pit bottom forming. Ground is excavated to form inner initial pit and then stepped trench is dug out under the protection of thixotropic mix along the initial pit perimeter in direction transversal to bordering formed by piles. Lower trench step is located below pit bottom level and the second cross-piece ends are secured to above step which is then concreted under the protection of thixotropic mix. After hardening support shoe of cross-pieces trench is filled with previously excavated ground and ground is excavated of the pit up to reacting pit bottom level.

EFFECT: possibility to consolidate pit just after the initial pit and framing belt forming.

3 cl, 2 dwg

The invention relates to mining and construction and can be used, in particular, in the construction of the launching pit to accommodate, for example, microtunneling complex

The invention relates to the field of construction and can be used during the construction of subsurface soil structures: fences, ditches, walls, mooring and other structures, building foundations, basements, walls, embankments, etc

The invention relates to the construction and can be used when carrying out earthworks mostly in cramped conditions

The invention relates to non-destructive methods of control and can be used in hydraulic engineering civil engineering, underground construction, mining, etc

FIELD: building, particularly for bordering or stiffening the sides of foundation pits.

SUBSTANCE: method involves driving vertical piles in ground along pit perimeter for depth exceeding pit bottom level; excavating ground up to reaching pit bottom level to open bordering member surfaces facing inwards; securing horizontal distribution beams to above surfaces to create framing belt; installing spaced cross-pieces along pit perimeter; leaning the first cross-piece ends against distribution beams and securing the second ends thereof into pit bottom ground; removing cross-pieces after reinforced concrete pit bottom forming. Ground is excavated to form inner initial pit and then stepped trench is dug out under the protection of thixotropic mix along the initial pit perimeter in direction transversal to bordering formed by piles. Lower trench step is located below pit bottom level and the second cross-piece ends are secured to above step which is then concreted under the protection of thixotropic mix. After hardening support shoe of cross-pieces trench is filled with previously excavated ground and ground is excavated of the pit up to reacting pit bottom level.

EFFECT: possibility to consolidate pit just after the initial pit and framing belt forming.

3 cl, 2 dwg

FIELD: building, particularly foundation pits rammed by free-fall method.

SUBSTANCE: device comprises cylindrical part connected to section of circular truncated mouth cone. The section has base provided with base having flat ring extending transversely to longitudinal device axis. Cone section is parallel to base and faces free end of cylindrical part.

EFFECT: prevention of ground protrusion in pit and taper formation during pit ramming, provision of free ram removal from pit bottom and ram retraction in guiding shaft for following ramming cycle performing.

2 dwg

FIELD: construction.

SUBSTANCE: bracing of boards of a foundation ditch includes protecting and load-carrying wall structure connected with a fastening belt, executed on the top of protecting and a load-carrying structure. The fastening belt is executed in the form of the salient aside reinforced flange from a foundation ditch, located in an dimple of the fore shaft with possibility of rigid connection of a prefabricated reinforcement cage of a flange with the top exposed part of a prefabricated reinforcement cage of a wall structure and joints concreting this connection for increase in flexural rigidness.

EFFECT: increase in flexural rigidness of an upper part of bracing in a vertical plane for a full exception of horizontal moving of a load-carrying wall and a ground towards a foundation ditch.

4 cl, 2 dwg

FIELD: construction.

SUBSTANCE: in method to excavate foundation pit when doing emergency works at subsurface structures including reinforcement of gap slopes, expanding, reinforcing and hardening material is injected into gap in unstable zone until complete filling of gap, and reinforced area is shaped in unstable zone by curing until full hardening of specified material, then soil is cut in layers, and a layer of expanded, reinforcing and hardened material is cut down to subsurface structure.

EFFECT: simplified technology of foundation pit slopes reinforcement and reduced time for its performance.

2 cl, 1 ex, 5 dwg

FIELD: construction.

SUBSTANCE: method to reinforce foundation pit and trench boards includes arrangement of a rigid L-shaped structure made as a vertical retaining wall with a collar protruding towards the foundation pit fixed along the wall top, soil working in the foundation pit, installation of anchors and their tensioning. At first anchors are installed on the collar and tensioned, besides, anchors are installed in direction parallel to wall reinforcement, and value of anchors tension is maintained at the calculated level, reinforcement movement start is recorded, afterwards soil is worked in the foundation pit (trench).

EFFECT: neutralisation of impact from compressed pressure and putting reinforcement in operation before soil working in foundation pit, exclusion or minimisation of horizontal displacements of the wall, increased bearing capacity of soil massif.

4 cl, 3 dwg

FIELD: construction.

SUBSTANCE: invention relates to the construction, namely to sheet pilings or retaining walls erected at the sites with free-flow current of ground water, in particular for the creation of sheet piling in foundation pits during conduction of repair works at major pipelines. Method for erecting the sheet piling when conducting works at major pipeline includes the assembly of the guide frame and lock in place of erection of sheet piling by driving the racks, installation of the guide frame on them and driving of sheet piles of fencing with their closure in plan. Repair foundation pit is excavated preliminary and major pipeline is opened on top to the depth not less than 0.6 m from the bottom forming tube of major pipeline to the bottom of foundation pit, besides the foundation pit is excavated along the length exceeding the length of the cut section of major pipeline to not less than 2 m. Repair foundation pit is bordered with the compacted clay along the exterior perimeter. Four racks are mounted in the corners of repair foundation pit with section protruding over the curve of repair foundation pit to not less than 15 cm, retaining fingers are inserted into the holes of racks and then I-beams of guide frame are mounted on racks, after that the sheet piles with formation along the perimeter of guide frame from I-beams of sheet piling are suppressed into the soil along the I-beams between the walls of repair foundation pit and I-beam. Part of sheet piles leaves not less than 15 cm over the curve of the repair foundation pit.

EFFECT: technical result consists in the increase of productivity when erecting and disassembling the sheet piling, reduction of material consumption of sheet piling, simplification of structure.

5 cl, 3 dwg

FIELD: construction.

SUBSTANCE: method of the walls excavation shoring, in which prior to the soil excavation in the pit the leader setup in the level of the pit bottom of the backfill or buried membrane is carried out, which is becoming the rigid spacer, provides the minimum depth of the pit wall fixing.

EFFECT: increase of the reliability and durability of the whole facility in accordance with regulatory requirements, reduction in consumption of materials and labour intensity of underground part structure construction by reducing the depth of the excavation shoring walls bottom embedding.

3 dwg

FIELD: construction.

SUBSTANCE: invention can be used in the construction of underground structures such as "wall in the soil", namely for arranging a fore shaft used while executing a monolithic trench "wall in the soil". The prefabricated reinforced concrete fore shaft consists of prefabricated reinforced concrete elements of the L-shaped section, connected by means of embedded metal plates. The fore shaft elements are connected by means of at least two keys engaged by toothings, the keys being reinforced. On the upper edges of the prefabricated fore shaft in the same plane with the concrete surface, metal embedding angles are mounted, which are anchored in the concrete.

EFFECT: increasing the stiffness, bearing capacity and reliability of the interface nodes of the prefabricated fore shaft elements, reducing the labour costs, improving the structure installation quality, ensuring its durability and maintainability, which guarantees frequent use of the fore shaft structure and significantly reducing its cost.

9 cl, 2 dwg

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