CN112343080A - Reinforcement structure based on old plant infrastructure and construction method - Google Patents
Reinforcement structure based on old plant infrastructure and construction method Download PDFInfo
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- CN112343080A CN112343080A CN202011138967.8A CN202011138967A CN112343080A CN 112343080 A CN112343080 A CN 112343080A CN 202011138967 A CN202011138967 A CN 202011138967A CN 112343080 A CN112343080 A CN 112343080A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
- E02D27/48—Foundations inserted underneath existing buildings or constructions
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/06—Foundation trenches ditches or narrow shafts
- E02D17/08—Bordering or stiffening the sides of ditches trenches or narrow shafts for foundations
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/10—Deep foundations
- E02D27/12—Pile foundations
- E02D27/14—Pile framings, i.e. piles assembled to form the substructure
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/08—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against transmission of vibrations or movements in the foundation soil
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D37/00—Repair of damaged foundations or foundation structures
Abstract
The invention discloses a reinforcing structure based on old plant foundation construction and a construction method, wherein the reinforcing structure comprises an original foundation mechanism, wherein an original foundation beam is vertically arranged on the upper surface of the original foundation mechanism, original bearing platform cast-in-place piles are embedded and installed on the lower surfaces of two sides of the original foundation mechanism, new foundation bearing platforms are arranged on two sides of the original foundation mechanism, and new steel pipe piles are embedded and installed on the lower surfaces of the two new foundation bearing platforms. The invention relates to the technical field of plant reconstruction, and in particular relates to a reinforcing structure and a construction method based on old plant infrastructure.
Description
Technical Field
The invention relates to the technical field of plant reconstruction, in particular to a reinforcing structure based on old plant infrastructure and a construction method.
Background
The factory building is a house for industrial and commercial purposes, which adopts a reinforced concrete column and a steel column bearing cabinet frame or a bent frame structure, and after the factory building is used for a long time, the stability of the foundation of the factory building is poor, and the foundation of the factory building needs to be reinforced.
The invention with the Chinese patent number of CN110273441A discloses a structural reinforcement and construction method for an old plant foundation by adopting a newly-added steel pipe pile and a newly-added concrete bearing platform, which comprises an original structural foundation beam, an original foundation bearing platform and an original immersed tube cast-in-place pile. The original structure foundation beam is arranged on the original foundation bearing platform; the original immersed tube cast-in-place pile is anchored on two sides of the bottom of an original foundation bearing platform and comprises a newly-added concrete bearing platform, newly-added steel tube piles and newly-added anchoring reinforcing steel bars; the newly-added concrete bearing platform is erected above the newly-added steel pipe pile, the newly-added concrete bearing platform and the newly-added steel pipe pile are arranged on two sides of the original foundation bearing platform at the same time, and the newly-added concrete bearing platforms on two sides are in anchoring connection with the original foundation bearing platform.
However, after the plant foundation is transformed, the stability of the plant foundation is not ideal enough, the earthquake resistance is not ideal, and when an earthquake occurs, the plant is easy to collapse, so that the health of personnel is threatened, and the defect is not correspondingly improved.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a reinforcing structure based on old plant foundation construction and a construction method, and solves the problems that the stability of a plant foundation is not ideal enough after the plant foundation is transformed, the anti-seismic performance is not ideal, and the plant is easy to collapse when an earthquake occurs.
In order to achieve the purpose, the invention is realized by the following technical scheme: the utility model provides a reinforced structure based on old factory building infrastructure, includes former foundatin mechanism, the last surface vertical of former foundatin mechanism is provided with former foundation beam, and the equal embedding of both sides lower surface of former foundatin mechanism installs former cushion cap bored concrete pile, the both sides of former foundatin mechanism all are provided with new foundatin cushion cap, two new steel-pipe pile is installed in the equal embedding of lower surface of new foundatin cushion cap.
Former foundatin mechanism is including former foundatin cushion cap, the both sides upper surface of former foundatin cushion cap all seted up with new foundatin cushion cap assorted overlap joint groove, the mounting groove has all been seted up to the side upper surface around the overlap joint groove, the antidetonation piece is installed in the inside embedding of mounting groove, the upper surface in overlap joint groove is located position department between two antidetonation pieces and is provided with the anchor reinforcing bar frame.
The anti-seismic part comprises a first steel plate cushion seat, the upper surface of the first steel plate cushion seat is fixedly connected with a rubber support, and the upper surface of the rubber support is fixedly connected with a second steel plate cushion seat.
Preferably, first steel sheet chock is installed in the inside of mounting groove, and the upper surface of first steel sheet chock flushes with the upper surface in overlap joint groove, the front and back side lower surface of new basic cushion cap all seted up with second steel sheet chock assorted draw-in groove.
Preferably, four anchoring reinforcing frames are transversely arranged, three anchoring reinforcing frames are longitudinally arranged, each anchoring reinforcing frame is bound and connected through steel wires, and the new foundation bearing platform is lapped on the lapping grooves.
Preferably, the upper surface of the new foundation bearing platform is provided with second anchoring steel bars corresponding to the new steel pipe pile in a penetrating mode, the lower ends of the second anchoring steel bars are installed at the upper end of the new steel pipe pile in an embedded mode, the other side of the new foundation bearing platform is installed at the second anchoring steel bars in an embedded mode, one end of each second anchoring steel bar penetrates through one side face of the upper end of the new steel pipe pile, and the number of the first anchoring steel bars and the number of the second anchoring steel bars are four.
Preferably, the reinforcement construction method of the reinforcement structure based on the old plant infrastructure comprises the following steps:
s1, determining the position where the bearing capacity of the old factory building is insufficient according to the position of the old factory building needing to be reinforced, drawing a basic drawing for reinforcing the old factory building by a designer after the determination is finished, and measuring the positions of new steel pipe piles at two sides of the foundation of the old factory building by a total station according to the size of the drawing after the basic drawing is designed;
s2, in the step S1, after the position of the new steel pipe pile is determined, drilling is carried out on the position of the new steel pipe pile by using a hole forming machine, the drilled hole diameter is 30cm, the hole depth is 10m, and in the drilling process, mud circulation is adopted for wall protection;
s3, in the step S2, in the stage of drilling for 2m to 3m, the specific gravity of the slurry is set to be 1-1.04, the viscosity is set to be 20-24, the sand content is set to be 2-4%, the PH value is set to be 7-9, in the stage of drilling for 3m to 9m, the specific gravity of the slurry is set to be 1.06-1.13, the viscosity is set to be 22-26, the sand content is set to be 1-3%, the PH value is set to be 7-9, in the stage of drilling for 10m, the specific gravity of the slurry is set to be 1.04-1.07, the viscosity is set to be 18-21, the sand content is set to be 1-1.8%, and the PH value is;
s4, in the step S3, after drilling, taking out a new steel pipe pile of 10.7-10.8 m, measuring the position of a grout overflow hole on the new steel pipe pile, then processing the grout overflow by adopting a gas cutting mode, sleeving a seamless steel pipe at the lower end of the new steel pipe pile, welding and fixing the seamless steel pipe with the new steel pipe pile, after welding, inserting the new steel pipe pile into the drilled hole, compacting the steel pipe by using a heavy hammer, and after compacting is finished, pouring a mixture of crushed stone coarse aggregate and slurry into the new steel pipe pile until the mixture is flush with the upper end of the new steel pipe pile;
s5, chiseling the positions of the lap joint grooves on the upper surfaces of the two sides of the original foundation bearing platform, chiseling two mounting grooves on the upper surface of the lap joint grooves, chiseling the insides of the lap joint grooves and the mounting grooves, placing the anti-seismic part into the mounting grooves after chiseling, binding the anchoring reinforcing steel bar frame on the lap joint grooves, binding the second anchoring reinforcing steel bars to the first anchoring reinforcing steel bars after binding, fixing the other ends of the second anchoring reinforcing steel bars to the lap joint grooves, supporting the formwork after fixing, pouring concrete on the formwork, forming the new foundation bearing platform, and finally finishing the reinforcement work on the old factory building foundation.
Preferably, in the step S4, the particle size of the crushed stone coarse aggregate is 3-5 cm, the specific gravity of the slurry is set to be 1.04-1.17, the viscosity is set to be 23-28, the sand content is set to be 2-6%, and the PH value is set to be 7-9.
Preferably, in the step S4, before the crushed stone coarse aggregate and the slurry in the new steel pipe pile are injected, four first anchor bars are inserted into the upper end of the new steel pipe pile, and then the new steel pipe pile is maintained for 7 to 10 days.
Preferably, in the step S5, the concrete poured is C25 concrete, and after the new foundation cap is completely poured, the new foundation cap is maintained for 14 to 20 days.
Advantageous effects
The invention provides a reinforced structure based on old plant infrastructure and a construction method, and compared with the prior art, the reinforced structure has the following beneficial effects:
(1) this reinforced structure and construction method based on old factory building infrastructure, through set up an antidetonation piece on former basis cushion cap, after this factory building transformation finishes, if when taking place the earthquake, utilize the elasticity of rubber support, can play fine buffering antidetonation to new basis cushion cap, the stability of factory building has been guaranteed, prevent that the factory building from taking place the phenomenon of collapsing, and then played the guard action to personnel's life safety, the security performance of this factory building has been improved, and then the life of this factory building has been prolonged.
(2) This reinforced structure and construction method based on old factory building infrastructure carries out multiple improvement through the mud parameter to the dado for the mud dado of different parameters is all adopted in the three stage of drilling, has guaranteed the fastness and the stability of downthehole wall, makes the inner wall not take place the condition of collapsing, has improved the mud dado and has arranged the effect of sediment, and then makes the factory building after reforming transform safer.
Drawings
FIG. 1 is a perspective view of the structure of the present invention;
FIG. 2 is a schematic diagram of the original basic mechanism of the present invention;
FIG. 3 is a schematic view of the structure of the seismic member of the present invention.
In the figure: 1. an original foundation mechanism; 11. an original foundation bearing platform; 12. a lap joint groove; 13. mounting grooves; 14. a seismic member; 141. a first steel plate cushion seat; 142. a rubber support; 143. a second steel plate cushion seat; 15. anchoring the reinforcing steel bar frame; 2. an original foundation beam; 3. filling the pile on the original bearing platform; 4. a new foundation cap; 41. a first anchoring bar; 42. a second anchoring bar; 5. and (5) new steel pipe piles.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-3, the present invention provides three technical solutions:
example one
The utility model provides a reinforced structure based on old factory building infrastructure, includes former foundatin mechanism 1, the last surface vertical of former foundatin mechanism 1 is provided with former foundation beam 2, and the equal embedding of both sides lower surface of former foundatin mechanism 1 installs former cushion cap bored concrete pile 3, and the both sides of former foundatin mechanism 1 all are provided with new foundatin cushion cap 4, and new steel-pipe pile 5 is installed in the equal embedding of lower surface of two new foundatin cushion caps 4.
The anti-seismic member 14 includes a first steel plate pad 141, a rubber support 142 is fixedly connected to the upper surface of the first steel plate pad 141, and a second steel plate pad 143 is fixedly connected to the upper surface of the rubber support 142.
Further, first steel sheet chock 141 is installed in the inside of mounting groove 13, and the upper surface of first steel sheet chock 141 flushes with the upper surface of overlap joint groove 12, and the draw-in groove with second steel sheet chock 143 assorted has all been seted up to the front and back side lower surface of new basic cushion cap 4.
Further, four anchoring reinforcing frames 15 are transversely arranged, three anchoring reinforcing frames 15 are longitudinally arranged, each anchoring reinforcing frame 15 is bound and connected through steel wires, and the new foundation bearing platform 4 is lapped on the lapping groove 12.
Furthermore, the upper surface of the new foundation bearing platform 4 is provided with a second anchoring steel bar 42 corresponding to the new steel pipe pile 5 in a penetrating manner, the lower end of the second anchoring steel bar 42 is embedded in the upper end of the new steel pipe pile 5, the other side of the new foundation bearing platform 4 is embedded in the second anchoring steel bar 42, one end of the second anchoring steel bar 42 penetrates through one side surface of the upper end of the new steel pipe pile 5, and the first anchoring steel bar 41 and the second anchoring steel bar 42 are both provided with four pieces.
Further, the reinforcement construction method of the reinforcement structure based on the old factory building infrastructure comprises the following steps:
s1, determining the position where the bearing capacity of the old factory building is insufficient according to the position of the old factory building needing to be reinforced, drawing a basic drawing for reinforcing the old factory building by a designer after the determination is finished, and measuring the positions of the new steel pipe piles 5 at the two sides of the foundation of the old factory building by a total station according to the size of the drawing after the basic drawing is designed;
s2, in step S1, after the position of the new steel pipe pile 5 is determined, drilling at the position of the new steel pipe pile 5 by using a hole forming machine, wherein the drilled hole diameter is 30cm, the hole depth is 10m, and in the drilling process, mud circulation is adopted for wall protection;
s3, step S2, in the stage of drilling 2m to 3m, the specific gravity of the mud is set to 1, the viscosity is set to 20, the sand content is set to 2%, and the PH value is set to 7, in the stage of drilling 3m to 9m, the specific gravity of the mud is set to 1.06, the viscosity is set to 22, the sand content is set to 1%, and the PH value is set to 7, in the stage of drilling 10m, the specific gravity of the mud is set to 1.04, the viscosity is set to 18, the sand content is set to 1%, and the PH value is set to 7;
s4, step S3, after drilling, taking out a new steel pipe pile 5 of 10.7m, measuring the position of a grout overflow hole on the new steel pipe pile 5, then processing the grout overflow by adopting a gas cutting mode, sleeving a seamless steel pipe at the lower end of the new steel pipe pile 5, welding and fixing the seamless steel pipe with the new steel pipe pile 5, after welding, inserting the new steel pipe pile 5 into the drilled hole, compacting the hole by using a heavy hammer, and after compacting is finished, pouring a mixture of crushed stone coarse aggregate and slurry into the new steel pipe pile 5 until the mixture is flush with the upper end of the new steel pipe pile 5;
s5, chiseling the positions of the lapping grooves 12 on the upper surfaces of the two sides of the original foundation bearing platform 11, chiseling two mounting grooves 13 on the upper surface of the lapping grooves 12, chiseling the insides of the lapping grooves 12 and the mounting grooves 13, after chiseling is finished, putting the anti-seismic piece 14 into the mounting grooves 13, then binding the anchoring reinforcing steel bar frame 15 on the lapping grooves 12, after binding is finished, binding the second anchoring reinforcing steel bars 42 to the first anchoring reinforcing steel bars 41, enabling the other ends of the second anchoring reinforcing steel bars 42 to be fixed on the lapping grooves 12, after fixing, supporting the formwork, then pouring concrete on the formwork, enabling the new foundation bearing platform 4 to be molded, and finally completing the reinforcing work of the old factory building foundation.
Further, in step S4, the crushed stone coarse aggregate has a particle size of 3cm, the slurry has a specific gravity of 1.04, a viscosity of 23, a sand content of 2%, and a pH of 7.
Further, in step S4, before the crushed stone coarse aggregate and the slurry are injected into the new steel-pipe pile 5, the four first anchor bars 41 are inserted into the upper end of the new steel-pipe pile 5, and then the new steel-pipe pile 5 is maintained for 7 days.
Further, in step S5, the concrete to be poured is C25 concrete, and after the new foundation cap 4 is poured, it is cured for 14 days.
Example two
The utility model provides a reinforced structure based on old factory building infrastructure, includes former foundatin mechanism 1, the last surface vertical of former foundatin mechanism 1 is provided with former foundation beam 2, and the equal embedding of both sides lower surface of former foundatin mechanism 1 installs former cushion cap bored concrete pile 3, and the both sides of former foundatin mechanism 1 all are provided with new foundatin cushion cap 4, and new steel-pipe pile 5 is installed in the equal embedding of lower surface of two new foundatin cushion caps 4.
The anti-seismic member 14 includes a first steel plate pad 141, a rubber support 142 is fixedly connected to the upper surface of the first steel plate pad 141, and a second steel plate pad 143 is fixedly connected to the upper surface of the rubber support 142.
Further, first steel sheet chock 141 is installed in the inside of mounting groove 13, and the upper surface of first steel sheet chock 141 flushes with the upper surface of overlap joint groove 12, and the draw-in groove with second steel sheet chock 143 assorted has all been seted up to the front and back side lower surface of new basic cushion cap 4.
Further, four anchoring reinforcing frames 15 are transversely arranged, three anchoring reinforcing frames 15 are longitudinally arranged, each anchoring reinforcing frame 15 is bound and connected through steel wires, and the new foundation bearing platform 4 is lapped on the lapping groove 12.
Furthermore, the upper surface of the new foundation bearing platform 4 is provided with a second anchoring steel bar 42 corresponding to the new steel pipe pile 5 in a penetrating manner, the lower end of the second anchoring steel bar 42 is embedded in the upper end of the new steel pipe pile 5, the other side of the new foundation bearing platform 4 is embedded in the second anchoring steel bar 42, one end of the second anchoring steel bar 42 penetrates through one side surface of the upper end of the new steel pipe pile 5, and the first anchoring steel bar 41 and the second anchoring steel bar 42 are both provided with four pieces.
Further, the reinforcement construction method of the reinforcement structure based on the old factory building infrastructure comprises the following steps:
s1, determining the position where the bearing capacity of the old factory building is insufficient according to the position of the old factory building needing to be reinforced, drawing a basic drawing for reinforcing the old factory building by a designer after the determination is finished, and measuring the positions of the new steel pipe piles 5 at the two sides of the foundation of the old factory building by a total station according to the size of the drawing after the basic drawing is designed;
s2, in step S1, after the position of the new steel pipe pile 5 is determined, drilling at the position of the new steel pipe pile 5 by using a hole forming machine, wherein the drilled hole diameter is 30cm, the hole depth is 10m, and in the drilling process, mud circulation is adopted for wall protection;
s3, step S2, in the stage of drilling 2m to 3m, the specific gravity of the mud is set to 1.04, the viscosity is set to 24, the sand content is set to 4%, and the PH value is set to 9, in the stage of drilling 3m to 9m, the specific gravity of the mud is set to 1.13, the viscosity is set to 26, the sand content is set to 3%, and the PH value is set to 9, in the stage of drilling 10m, the specific gravity of the mud is set to 1.07, the viscosity is set to 21, the sand content is set to 1.8%, and the PH value is set to 9;
s4, step S3, after drilling, taking out a new steel pipe pile 5 of 10.8m, measuring the position of a grout overflow hole on the new steel pipe pile 5, then processing the grout overflow by adopting a gas cutting mode, sleeving a seamless steel pipe at the lower end of the new steel pipe pile 5, welding and fixing the seamless steel pipe with the new steel pipe pile 5, after welding, inserting the new steel pipe pile 5 into the drilled hole, compacting the hole by using a heavy hammer, and after compacting is finished, pouring a mixture of crushed stone coarse aggregate and slurry into the new steel pipe pile 5 until the mixture is flush with the upper end of the new steel pipe pile 5;
s5, chiseling the positions of the lapping grooves 12 on the upper surfaces of the two sides of the original foundation bearing platform 11, chiseling two mounting grooves 13 on the upper surface of the lapping grooves 12, chiseling the insides of the lapping grooves 12 and the mounting grooves 13, after chiseling is finished, putting the anti-seismic piece 14 into the mounting grooves 13, then binding the anchoring reinforcing steel bar frame 15 on the lapping grooves 12, after binding is finished, binding the second anchoring reinforcing steel bars 42 to the first anchoring reinforcing steel bars 41, enabling the other ends of the second anchoring reinforcing steel bars 42 to be fixed on the lapping grooves 12, after fixing, supporting the formwork, then pouring concrete on the formwork, enabling the new foundation bearing platform 4 to be molded, and finally completing the reinforcing work of the old factory building foundation.
Further, in step S4, the crushed stone coarse aggregate has a particle size of 5cm, the specific gravity of the slurry is set to 1.17, the viscosity is set to 28, the sand content is set to 6%, and the pH is set to 9.
Further, in step S4, before the crushed stone coarse aggregate and the slurry are injected into the new steel-pipe pile 5, the four first anchor bars 41 are inserted into the upper end of the new steel-pipe pile 5, and then the new steel-pipe pile 5 is maintained for 10 days.
Further, in step S5, the concrete to be poured is C25 concrete, and after the new foundation cap 4 is completely poured, it is cured for 20 days.
EXAMPLE III
The utility model provides a reinforced structure based on old factory building infrastructure, includes former foundatin mechanism 1, the last surface vertical of former foundatin mechanism 1 is provided with former foundation beam 2, and the equal embedding of both sides lower surface of former foundatin mechanism 1 installs former cushion cap bored concrete pile 3, and the both sides of former foundatin mechanism 1 all are provided with new foundatin cushion cap 4, and new steel-pipe pile 5 is installed in the equal embedding of lower surface of two new foundatin cushion caps 4.
The anti-seismic member 14 includes a first steel plate pad 141, a rubber support 142 is fixedly connected to the upper surface of the first steel plate pad 141, and a second steel plate pad 143 is fixedly connected to the upper surface of the rubber support 142.
Further, first steel sheet chock 141 is installed in the inside of mounting groove 13, and the upper surface of first steel sheet chock 141 flushes with the upper surface of overlap joint groove 12, and the draw-in groove with second steel sheet chock 143 assorted has all been seted up to the front and back side lower surface of new basic cushion cap 4.
Further, four anchoring reinforcing frames 15 are transversely arranged, three anchoring reinforcing frames 15 are longitudinally arranged, each anchoring reinforcing frame 15 is bound and connected through steel wires, and the new foundation bearing platform 4 is lapped on the lapping groove 12.
Furthermore, the upper surface of the new foundation bearing platform 4 is provided with a second anchoring steel bar 42 corresponding to the new steel pipe pile 5 in a penetrating manner, the lower end of the second anchoring steel bar 42 is embedded in the upper end of the new steel pipe pile 5, the other side of the new foundation bearing platform 4 is embedded in the second anchoring steel bar 42, one end of the second anchoring steel bar 42 penetrates through one side surface of the upper end of the new steel pipe pile 5, and the first anchoring steel bar 41 and the second anchoring steel bar 42 are both provided with four pieces.
Further, the reinforcement construction method of the reinforcement structure based on the old factory building infrastructure comprises the following steps:
s1, determining the position where the bearing capacity of the old factory building is insufficient according to the position of the old factory building needing to be reinforced, drawing a basic drawing for reinforcing the old factory building by a designer after the determination is finished, and measuring the positions of the new steel pipe piles 5 at the two sides of the foundation of the old factory building by a total station according to the size of the drawing after the basic drawing is designed;
s2, in step S1, after the position of the new steel pipe pile 5 is determined, drilling at the position of the new steel pipe pile 5 by using a hole forming machine, wherein the drilled hole diameter is 30cm, the hole depth is 10m, and in the drilling process, mud circulation is adopted for wall protection;
s3, step S2, in the stage of drilling 2m to 3m, the specific gravity of the mud is set to 1.02, the viscosity is set to 22, the sand content is set to 3%, and the PH value is set to 8, in the stage of drilling 3m to 9m, the specific gravity of the mud is set to 1.1, the viscosity is set to 24, the sand content is set to 2%, and the PH value is set to 8, in the stage of drilling 10m, the specific gravity of the mud is set to 1.5, the viscosity is set to 19, the sand content is set to 1.4%, and the PH value is set to 8;
s4, step S3, after drilling, taking out a new steel pipe pile 5 of 10.75m, measuring the position of a grout overflow hole on the new steel pipe pile 5, then processing the grout overflow by adopting a gas cutting mode, sleeving a seamless steel pipe at the lower end of the new steel pipe pile 5, welding and fixing the seamless steel pipe with the new steel pipe pile 5, after welding, inserting the new steel pipe pile 5 into the drilled hole, compacting the hole by using a heavy hammer, and after compacting is finished, pouring a mixture of crushed stone coarse aggregate and slurry into the new steel pipe pile 5 until the mixture is flush with the upper end of the new steel pipe pile 5;
s5, chiseling the positions of the lapping grooves 12 on the upper surfaces of the two sides of the original foundation bearing platform 11, chiseling two mounting grooves 13 on the upper surface of the lapping grooves 12, chiseling the insides of the lapping grooves 12 and the mounting grooves 13, after chiseling is finished, putting the anti-seismic piece 14 into the mounting grooves 13, then binding the anchoring reinforcing steel bar frame 15 on the lapping grooves 12, after binding is finished, binding the second anchoring reinforcing steel bars 42 to the first anchoring reinforcing steel bars 41, enabling the other ends of the second anchoring reinforcing steel bars 42 to be fixed on the lapping grooves 12, after fixing, supporting the formwork, then pouring concrete on the formwork, enabling the new foundation bearing platform 4 to be molded, and finally completing the reinforcing work of the old factory building foundation.
Further, in step S4, the crushed stone coarse aggregate has a particle size of 4cm, the slurry has a specific gravity of 1.12, a viscosity of 25, a sand content of 4%, and a pH of 8.
Further, in step S4, before the crushed stone coarse aggregate and the slurry are injected into the new steel-pipe pile 5, the four first anchor bars 41 are inserted into the upper end of the new steel-pipe pile 5, and then the new steel-pipe pile 5 is maintained for 8 days.
Further, in step S5, the concrete to be poured is C25 concrete, and after the new foundation cap 4 is completely poured, it is cured for 17 days.
And those not described in detail in this specification are well within the skill of those in the art.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. Reinforced structure based on old factory building infrastructure, including former foundatin mechanism (1), the upper surface of former foundatin mechanism (1) is provided with former foundation beam (2) perpendicularly, and the equal embedding of both sides lower surface of former foundatin mechanism (1) installs former cushion cap bored concrete pile (3), its characterized in that: new foundation bearing platforms (4) are arranged on two sides of the original foundation mechanism (1), and new steel pipe piles (5) are embedded and installed on the lower surfaces of the two new foundation bearing platforms (4);
the original foundation mechanism (1) comprises an original foundation bearing platform (11), wherein the upper surfaces of two sides of the original foundation bearing platform (11) are respectively provided with a lapping groove (12) matched with a new foundation bearing platform (4), the upper surfaces of the front side and the rear side of each lapping groove (12) are respectively provided with a mounting groove (13), an anti-seismic piece (14) is embedded in each mounting groove (13), and an anchoring reinforcing steel bar frame (15) is arranged at a position, between the two anti-seismic pieces (14), of the upper surface of each lapping groove (12);
the anti-seismic part (14) comprises a first steel plate cushion seat (141), the upper surface of the first steel plate cushion seat (141) is fixedly connected with a rubber support (142), and the upper surface of the rubber support (142) is fixedly connected with a second steel plate cushion seat (143).
2. The reinforced structure based on old plant infrastructure of claim 1, characterized in that: first steel sheet base (141) are installed in the inside of mounting groove (13), and the upper surface of first steel sheet base (141) flushes with the upper surface of overlap joint groove (12), the draw-in groove with second steel sheet base (143) assorted has all been seted up to the front and back side lower surface of new basis cushion cap (4).
3. The reinforced structure based on old plant infrastructure of claim 1, characterized in that: the horizontal of anchoring reinforcing bar frame (15) is provided with four, and vertically is provided with three of anchoring reinforcing bar frame (15), each is through the steel wire ligature connection between anchoring reinforcing bar frame (15), new basis cushion cap (4) is lapped on overlap joint groove (12).
4. The reinforced structure based on old plant infrastructure of claim 1, characterized in that: the novel steel pipe pile foundation comprises a new foundation bearing platform (4), wherein a second anchoring steel bar (42) corresponding to a new steel pipe pile (5) is installed on the upper surface of the new foundation bearing platform (4) in a penetrating mode, the lower end of the second anchoring steel bar (42) is installed at the upper end of the new steel pipe pile (5) in an embedded mode, the other side of the new foundation bearing platform (4) is installed in the second anchoring steel bar (42) in an embedded mode, one end of the second anchoring steel bar (42) penetrates through one side face of the upper end of the new steel pipe pile (5), and the first anchoring steel bar (41) and the second anchoring steel bar (42) are four.
5. The reinforcement structure based on the old factory building infrastructure according to any one of claims 1 to 4, wherein the reinforcement construction method comprises the following steps:
s1, determining the position where the bearing capacity of the old factory building is insufficient according to the position of the old factory building needing to be reinforced, drawing a basic drawing for reinforcing the old factory building by a designer after the determination is finished, and measuring the positions of new steel pipe piles (5) at two sides of the foundation of the old factory building by a total station according to the size of the drawing after the basic drawing is designed;
s2, in the step S1, after the position of the new steel pipe pile (5) is determined, drilling is carried out on the position of the new steel pipe pile (5) by using a hole forming machine, the drilled hole diameter is 30cm, the hole depth is 10m, and in the drilling process, mud circulation is adopted for wall protection;
s3, in the step S2, in the stage of drilling for 2m to 3m, the specific gravity of the slurry is set to be 1-1.04, the viscosity is set to be 20-24, the sand content is set to be 2-4%, the PH value is set to be 7-9, in the stage of drilling for 3m to 9m, the specific gravity of the slurry is set to be 1.06-1.13, the viscosity is set to be 22-26, the sand content is set to be 1-3%, the PH value is set to be 7-9, in the stage of drilling for 10m, the specific gravity of the slurry is set to be 1.04-1.07, the viscosity is set to be 18-21, the sand content is set to be 1-1.8%, and the PH value is;
s4, in the step S3, after drilling, taking out a new steel pipe pile (5) with the thickness of 10.7-10.8 m, measuring the position of a slurry overflow hole on the new steel pipe pile (5), then processing the slurry overflow by adopting a gas cutting mode, sleeving a seamless steel pipe on the lower end of the new steel pipe pile (5), welding and fixing the seamless steel pipe with the new steel pipe pile (5), after welding, inserting the new steel pipe pile (5) into the drilled hole, compacting by using a heavy hammer, and after compacting, pouring a mixture of crushed stone coarse aggregate and slurry into the new steel pipe pile (5) until the mixture is flush with the upper end of the new steel pipe pile (5);
s5, chiseling the positions of the lap joint grooves (12) on the upper surfaces of the two sides of the original foundation bearing platform (11), chiseling two installation grooves (13) on the upper surfaces of the lap joint grooves (12), chiseling the insides of the lap joint grooves (12) and the installation grooves (13), after chiseling is finished, placing the shock-resistant part (14) into the installation grooves (13), binding the anchor reinforcing steel bar frames (15) on the lap joint grooves (12), binding the second anchor reinforcing steel bars (42) onto the first anchor reinforcing steel bars (41), fixing the other ends of the second anchor reinforcing steel bars (42) onto the lap joint grooves (12), supporting the formwork after fixing, pouring concrete on the formwork, forming the new foundation bearing platform (4), and finally finishing the reinforcement work of the old factory building foundation.
6. The reinforced structure construction method based on old plant infrastructure according to claim 5, wherein: in the step S4, the particle size of the broken stone coarse aggregate is 3-5 cm, the specific gravity of the slurry is set to be 1.04-1.17, the viscosity is set to be 23-28, the sand content is set to be 2-6%, and the PH value is set to be 7-9.
7. The reinforced structure construction method based on old plant infrastructure according to claim 5, wherein: in the step S4, before the crushed stone coarse aggregate and the slurry in the new steel pipe pile (5) are injected, four first anchor steel bars (41) are inserted into the upper end of the new steel pipe pile (5), and then the new steel pipe pile (5) is maintained for 7-10 days.
8. The reinforced structure construction method based on old plant infrastructure according to claim 5, wherein: in the step S5, the poured concrete is C25 concrete, and the new foundation bearing platform (4) is maintained for 14-20 days after pouring is finished.
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| CN111794071A (en) * | 2020-07-06 | 2020-10-20 | 上海崇明水利工程有限公司 | Water conservancy bridge structure |
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| CN1113282A (en) * | 1995-05-17 | 1995-12-13 | 广州市鲁班建筑防水补强专业公司 | Method for connecting anchor-rod type supporting table |
| CN108060894A (en) * | 2017-12-12 | 2018-05-22 | 中交公局第二工程有限公司 | A kind of boring method under complex geological condition |
| CN207933880U (en) * | 2018-01-22 | 2018-10-02 | 湖北天宇建设有限公司 | A kind of road and bridge pier stake component of high stability |
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