CN114737575A - Foundation pit extension support body and foundation pit extension support method - Google Patents
Foundation pit extension support body and foundation pit extension support method Download PDFInfo
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- CN114737575A CN114737575A CN202210565128.7A CN202210565128A CN114737575A CN 114737575 A CN114737575 A CN 114737575A CN 202210565128 A CN202210565128 A CN 202210565128A CN 114737575 A CN114737575 A CN 114737575A
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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
- E02D17/02—Foundation pits
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/74—Means for anchoring structural elements or bulkheads
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
Abstract
The invention discloses a foundation pit extension support body and a foundation pit extension support method, which comprise an extension support assembly and an original support assembly, wherein the extension support assembly comprises an extension support, the original support assembly comprises an original support, the extension support is arranged outside the original support, the extension support has the same structure as the original support, the bottom of the extension support is fixedly connected with an extension bottom beam, the bottom of the extension bottom beam is fixedly connected with an extension base, the bottom of the extension base is fixedly connected with an extension fixed column, the top of the extension support is fixedly connected with an extension top beam, and four corners of the extension top beam and the extension bottom beam are detachably connected with extension connecting angle brackets through screws. According to the invention, the firmness of the device and a soil body is greatly improved through the main fixing anchor rod and the auxiliary fixing anchor rod, the gravity center of the device is reduced through the extension base and the extension fixing column, the device is more stable, and the firmness of four corners of the device can be greatly improved.
Description
Technical Field
The invention relates to the field of constructional engineering, in particular to a foundation pit extension supporting body and a foundation pit extension supporting method.
Background
The foundation pit support is widely used in foundation construction, and in some construction projects, the condition that the foundation pit support system is constructed and the area of the foundation pit needs to be enlarged exists, the position of the constructed support pile is not appropriate, the foundation pit extension construction after the area is enlarged is hindered, and a new foundation pit support system needs to be established.
The existing foundation pit extension supporting body mostly needs to dismantle an original supporting system and then establish a new supporting system in the construction process, and in the establishing process, in order to enable the supporting system to be firmer, anchors are often needed to be fixed, the fixing strength of the fixed anchors in the prior art is not strong, and the phenomenon of unstable supporting is easy to occur.
Therefore, it is necessary to provide a foundation pit extension support and a foundation pit extension support method to solve the above problems.
Disclosure of Invention
The invention aims to provide a foundation pit extension support body and a foundation pit extension support method, which greatly improve the firmness of a device and a soil body through a main fixing anchor rod and an auxiliary fixing anchor rod, reduce the gravity center of the device through an extension base and an extension fixing column, and are more stable, and the firmness of four corners of the device can be greatly improved under the action of an extension connecting angle bracket, so that the problems that in the prior art, the original support system is mostly required to be dismantled and a new support system is built in the construction process of the foundation pit extension support body, and in the building process, the anchor is often required to be fixed in order to enable the support system to be firmer, the fixing anchor fixing strength in the prior art is not strong, and the phenomenon of insecurity of the support is easy to occur are solved.
In order to achieve the above purpose, the invention provides the following technical scheme: a foundation pit extension support body comprises an extension support assembly and an original support assembly, wherein the extension support assembly comprises an extension support, the original support assembly comprises an original support, the extension support is arranged outside the original support, the extension support has the same structure as the original support, the bottom of the extension support is fixedly connected with an extension bottom beam, the bottom of the extension bottom beam is fixedly connected with an extension base, the bottom of the extension base is fixedly connected with an extension fixed column, the top of the extension support is fixedly connected with an extension top beam, four corners of the extension top beam and the extension bottom beam are detachably connected with extension connecting angle frames through screws, the bottom of the original support is fixedly connected with the original bottom beam, the bottom of the original bottom beam is fixedly connected with the original base, the bottom of the original base is fixedly connected with the original fixed column, the top of the original base is fixedly connected with the original top beam, the four corners of the original top beam and the original bottom beam are detachably connected with original connecting angle frames through screws, and main fixing anchor rods are inserted into the four sides of the original support and the extension support;
the bottom outside fixedly connected with bottom plate of main fixed stock, the bottom of bottom plate is rotated and is connected with adjusting nut, the inside of main fixed stock is provided with fixed interior pole, the inside of fixed interior pole is provided with the dead slot, movable spout has all been seted up to the both sides wall of dead slot, the inside of main fixed stock is provided with the cavity, the middle fixedly connected with and the dead slot matched with baffle of cavity, fixed spout has been seted up in the middle of the baffle, the inside sliding connection of fixed spout has vice fixed stock, the tip fixedly connected with connector of vice fixed stock.
Preferably, the top end fixedly connected with main anchor rod head of main fixed stock, the one end fixedly connected with vice anchor rod head of connector is kept away from to vice fixed stock, main anchor rod head and vice anchor rod head's shape all sets up to the taper shape.
Preferably, the bottom end of the fixed inner rod is provided with threads, and the fixed inner rod is in threaded connection with the adjusting nut.
Preferably, both sides wall of fixed spout all seted up with connector matched with spacing groove, vice stock head runs through the spacing groove and cooperatees with the activity spout.
Preferably, the inclination angle of the fixed sliding chute is set to be 45 degrees, and the fixed sliding chute is perpendicular to the movable sliding chute.
Preferably, the number of the auxiliary fixing anchor rods is set to be a plurality of, the auxiliary fixing anchor rods are uniformly distributed in the main fixing anchor rod, and every two adjacent auxiliary fixing anchor rods are perpendicular to each other.
Preferably, the inner sides of the extension support and the original support are fixedly connected with fixed cross beams, and the fixed cross beams are arranged at the joints of the extension support or the original support and the main fixed anchor rods.
Preferably, the main fixing anchor rods in the extension bracket and the main fixing anchor rods in the original bracket are distributed in a staggered mode.
A foundation pit extension support installation method of a foundation pit extension support body, comprising the foundation pit extension support body as claimed in any one of claims 1 to 8, the treatment steps are as follows:
the method comprises the following steps: an extension supporting pit is arranged, a curtain pit with a specified depth is arranged at a specified position on the outer side of an original support according to the size to be extended, and a base pile hole is arranged at the bottom of the curtain pit;
step two: pouring an extension support, then pouring concrete in the pile hole to form an extension fixing column, pouring concrete in the curtain pit to form an extension support, and integrally connecting the extension support and the extension fixing column;
step three: clearing an extension supporting pit, and excavating soil between the extension support and the original support to expose the extension support;
step four: a base is poured, a group of base pile holes are formed in the inner side of the extension support, concrete is poured inside the base pile holes to form a new extension fixing column, and an extension base is arranged at the top of each base pile hole to enable the extension base, the extension fixing column and the extension support to be fixedly connected;
step five: inserting an anchor rod, forming a through hole in the extension bracket, enabling the position of the through hole to be distributed in a staggered manner with the position of a main fixing anchor rod in the original bracket, enabling the main fixing anchor rod to incline downwards by 45 degrees to penetrate through the through hole and be inserted into a soil body, and then rotating an adjusting nut to enable a fixing inner rod to be drawn back in the main fixing anchor rod, so that an auxiliary fixing anchor rod is pushed out of the main fixing anchor rod and is contacted with the soil body;
step six: removing the original support assembly to enable the remaining main fixing anchor rods to be left in the soil body;
step seven: the fixed extension supporting assembly is fixedly connected with an extension crown beam at the top of an extension bracket, an extension bottom beam is fixedly arranged at the joint of the extension bracket and an extension base, so that a plurality of extension brackets are fixedly connected together, and extension connecting angle frames are fixedly arranged at four corners of the extension bottom beam and the extension crown beam through screws;
step eight: and the hidden anchor rods are formed by pouring concrete on one end of the inner side of the extension support, which is close to the main fixed anchor rods, so that a part of the leaked main fixed anchor rods and the inner fixed rod are hidden in the fixed cross beam, and the main fixed anchor rods are fixed on the extension support.
In the technical scheme, the invention provides the following technical effects and advantages:
1. the bottom of the extension support is fixedly connected with an extension base, and extension fixing columns are fixedly connected with the bottom of the extension base and the bottom of the extension support, so that the stability of the device is greatly improved, the main fixing anchor rod is downwards inclined by 45 degrees to penetrate through a through hole and inserted into a soil body, the ground gripping force of the main fixing anchor rod is improved, then an adjusting nut is rotated, a fixing inner rod is pulled back in the main fixing anchor rod, the auxiliary fixing anchor rod is pushed out of the main fixing anchor rod and inserted into the soil body, the contact area with the soil body is enlarged, and the fixing effect of the main fixing anchor rod is improved due to the inclined arrangement of the auxiliary fixing anchor rod;
2. and then removing the original support assembly, enabling the rest main fixing anchor rods to be left in the soil body, saving resources and improving the utilization rate, fixedly connecting an extension crown beam at the top of an extension bracket, fixedly arranging an extension base beam at the joint of the extension bracket and an extension base, fixedly connecting a plurality of extension brackets together, fixedly arranging extension connecting angle frames at four corners of the extension base beam and the extension crown beam through screws, improving the overall fixity of the device, and then building a fixing cross beam by using concrete at one end, close to the main fixing anchor rods, of the inner side of the extension bracket, so that a part of the main fixing anchor rods and the fixing inner rods which are leaked are hidden in the fixing cross beam, protecting the exposed main fixing anchor rods from being damaged, and fixing the main fixing anchor rods on the extension bracket, thereby completing the installation of the foundation pit extension support.
Drawings
In order to more clearly illustrate the embodiments of the present application or technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and other drawings can be obtained by those skilled in the art according to the drawings.
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic view of a partial structure of an extension support of the present invention;
FIG. 3 is a partial structural view of the original stent of the present invention;
fig. 4 is a schematic view of the overall structure of the main fixing anchor rod of the present invention;
FIG. 5 is a schematic view of the internal structure of the primary fixation anchor of the present invention;
FIG. 6 is a schematic cross-sectional view of the primary anchor of the present invention;
FIG. 7 is a schematic view of the connection structure of the primary and secondary anchor bolts according to the present invention;
FIG. 8 is a cross-sectional view of the fixed inner rod of the present invention;
fig. 9 is a perspective view of the secondary fixing anchor according to the present invention.
Description of reference numerals:
1. expanding the support; 11. expanding the base; 12. expanding a fixed column; 13. expanding a bottom beam; 14. expanding a crown beam; 15. expanding a connecting angle bracket; 16. fixing the cross beam; 2. original support; 21. an original base; 22. original fixed columns; 23. original crown beam; 24. originally connecting the angle bracket; 3. a main fixed anchor rod; 31. a main anchor rod head; 32. a base plate; 33. a baffle plate; 34. fixing the chute; 4. adjusting the screw cap; 5. fixing the inner rod; 51. an empty groove; 52. a movable chute; 6. auxiliary fixing anchor rods; 61. a connector; 62. and a secondary anchor rod head.
Detailed Description
In order to make the technical solutions of the present invention better understood, those skilled in the art will now describe the present invention in further detail with reference to the accompanying drawings.
The invention provides a foundation pit extension support body as shown in figures 1-9, which comprises an extension support assembly and an original support assembly, wherein the extension support assembly comprises an extension support 1, the original support assembly comprises an original support 2, the extension support 1 is arranged outside the original support 2, the extension support 1 has the same structure as the original support 2, the bottom of the extension support 1 is fixedly connected with an extension base beam 13, the bottom of the extension base beam 13 is fixedly connected with an extension base 11, the bottom of the extension base 11 is fixedly connected with an extension fixing column 12, the top of the extension support 1 is fixedly connected with an extension crown beam 14, four corners of the extension crown beam 14 and the extension base beam 13 are both detachably connected with extension connecting angle brackets 15 through screws, the bottom of the original support 2 is fixedly connected with the original base beam, the bottom of the original base beam is fixedly connected with an original base 21, the bottom of the original base 21 is fixedly connected with original fixing columns 22, the top of the original base 21 is fixedly connected with an original crown beam 23, four corners of the original crown beam 23 and four corners of the original bottom beam are detachably connected with original connecting angle brackets 24 through screws, and four sides of the original support 2 and the extension support 1 are respectively inserted with main fixing anchor rods 3;
the bottom outside fixedly connected with bottom plate 32 of main fixed stock 3, the bottom of bottom plate 32 is rotated and is connected with adjusting nut 4, the inside of main fixed stock 3 is provided with interior fixed pole 5, the inside of interior fixed pole 5 is provided with dead slot 51, movable spout 52 has all been seted up to the both sides wall of dead slot 51, the inside of main fixed stock 3 is provided with the cavity, the middle fixedly connected with and dead slot 51 matched with baffle 33 of cavity, fixed spout 34 has been seted up to the centre of baffle 33, the inside sliding connection of fixed spout 34 has vice fixed stock 6, the tip fixedly connected with connector 61 of vice fixed stock 6.
The top fixedly connected with owner's anchor head 31 of main fixed stock 3, the one end fixedly connected with vice anchor head 62 that connector 61 was kept away from to vice fixed stock 6, the shape of owner's anchor head 31 and vice anchor head 62 all sets up to the taper shape.
The bottom end of the fixed inner rod 5 is provided with threads, and the fixed inner rod 5 is in threaded connection with the adjusting nut 4.
The two side walls of the fixed sliding groove 34 are both provided with a limiting groove matched with the connector 61, and the auxiliary anchor rod head 62 penetrates through the limiting groove and is matched with the movable sliding groove 52.
The inclination angle of the fixed chute 34 is set to 45 °, and the fixed chute 34 is perpendicular to the movable chute 52.
The number of the auxiliary fixing anchor rods 6 is set to be a plurality of, a plurality of the auxiliary fixing anchor rods 6 are uniformly distributed in the main fixing anchor rod 3, and every two adjacent auxiliary fixing anchor rods 6 are perpendicular to each other.
The inner sides of the extension support 1 and the original support 2 are fixedly connected with a fixed cross beam 16, and the fixed cross beam 16 is arranged at the joint of the extension support 1 or the original support 2 and the main fixed anchor rod 3.
The main fixing anchor rods 3 in the extension support 1 and the main fixing anchor rods 3 in the original support 2 are distributed in a staggered mode.
A method for installing a foundation pit extension support of a foundation pit extension support, comprising the foundation pit extension support of any one of claims 1 to 8, the method comprising the following steps:
the method comprises the following steps: an extension supporting pit is arranged, a curtain pit with a specified depth is arranged at a specified position on the outer side of the original support 2 according to the size to be extended, and a base pile hole is arranged at the bottom of the curtain pit;
step two: pouring the extension support 1, then pouring concrete in the pile hole to form an extension fixing column 12, pouring concrete in the curtain pit to form the extension support 1, and integrally connecting the extension support 1 and the extension fixing column 12;
step three: clearing an extension supporting pit, and excavating soil between the extension support 1 and the original support 2 to expose the extension support 1;
step four: a base is poured, a group of base pile holes are formed in the inner side of the extension support 1, concrete is poured inside the base pile holes to form a new extension fixing column 12, an extension base 11 is arranged at the top of each base pile hole, and the extension base 11 is fixedly connected with the extension fixing column 12 and the extension support 1;
step five: inserting an anchor rod, forming a through hole in the extension bracket 1, enabling the position of the through hole and the position of a main fixing anchor rod 3 in the original bracket 2 to be distributed in a staggered mode, enabling the main fixing anchor rod 3 to incline downwards by 45 degrees to penetrate through the through hole and be inserted into a soil body, then rotating an adjusting nut 4, enabling a fixing inner rod 5 to be drawn back in the main fixing anchor rod 3, and accordingly pushing an auxiliary fixing anchor rod 6 out of the main fixing anchor rod 3 to be in contact with the soil body;
step six: dismantling the original support assembly to leave the residual main fixing anchor rods 3 in the soil body;
step seven: the fixed extension supporting assembly is characterized in that an extension crown beam 14 is fixedly connected to the top of an extension support 1, an extension base beam 13 is fixedly arranged at the joint of the extension support 1 and an extension base 11, so that a plurality of extension supports 1 are fixedly connected together, and extension connecting angle brackets 15 are fixedly arranged at four corners of the extension base beam 13 and the extension crown beam 14 through screws;
step eight: and hiding the anchor rods, and pouring concrete to the fixed cross beam 16 at the end, close to the main fixed anchor rods 3, on the inner side of the extension support 1, so that a part of the main fixed anchor rods 3 and the fixed inner rod 5 which leak outwards are hidden inside the fixed cross beam 16, and the main fixed anchor rods 3 are fixed on the extension support 1.
The working principle of the invention is as follows:
referring to the attached drawings 1-3 of the specification, firstly, according to the size to be expanded, a curtain pit with a specified depth is arranged at a specified position on the outer side of an original support 2, a base pile hole is arranged at the bottom of the curtain pit, then concrete is poured into the pile hole to form an expansion fixing column 12, concrete is poured into the curtain pit to form an expansion support 1, the expansion support 1 is integrally connected with the expansion fixing column 12, soil between the expansion support 1 and the original support 2 is removed to expose the expansion support 1, then a group of base pile holes are arranged on the inner side of the expansion support 1, concrete is poured into the expansion support 1 to form a new expansion fixing column 12, an expansion base 11 is arranged at the top of the base pile hole to fixedly connect the expansion base 11 with the expansion fixing column 12 and the expansion support 1, and then a through hole is arranged in the expansion support 1, the positions of the through holes and the positions of the main fixing anchor rods 3 in the original support 2 are distributed in a staggered mode, the main fixing anchor rods 3 are inclined downwards by 45 degrees and penetrate through the through holes and are inserted into the soil body, then the adjusting screw caps 4 are rotated, the fixing inner rod 5 is drawn back in the main fixing anchor rods 3, and therefore the auxiliary fixing anchor rods 6 are pushed out of the main fixing anchor rods 3 and are in contact with the soil body;
referring to the attached drawings 1-9 of the specification, then, by rotating the adjusting nut 4, the fixed inner rod 5 is driven to slide towards the outside of the main fixed anchor rod 3, so that the movable chute 52 on the side wall of the empty slot 51 moves, because the movable chute 52 is perpendicular to the fixed chute 34, and the auxiliary anchor rod head 62 penetrates through the limiting slot and is matched with the movable chute 52, so that the auxiliary anchor rod head 62 is driven to slide towards the outside of the movable chute 52, and in the same way, the auxiliary anchor rod head 62 slides towards the outside in the limiting slot, so that the auxiliary fixed anchor rod 6 is pushed in the fixed chute 34, so that the auxiliary fixed anchor rod 6 is inserted into the soil body, the contact area with the soil body is enlarged, because the auxiliary fixed anchor rod 6 is obliquely arranged, the fixing effect of the main fixed anchor rod 3 is improved, then the original support component is removed, the rest main fixed anchor rod 3 is left in the soil body, the top of the extension bracket 1 is fixedly connected with the extension crown beam 14, and an extension bottom beam 13 is fixedly arranged at the joint of the extension support 1 and the extension base 11, so that a plurality of extension supports 1 are fixedly connected together, then extension connecting angle brackets 15 are fixedly arranged at four corners of the extension bottom beam 13 and the extension top beam 14 through screws, and then a fixing cross beam 16 is poured by concrete at one end of the inner side of the extension support 1 close to the main fixing anchor rods 3, so that a part of the main fixing anchor rods 3 and the fixing inner rod 5 which leak outwards are hidden in the fixing cross beam 16, and the main fixing anchor rods 3 are fixed on the extension supports 1, thereby completing the installation of the foundation pit extension support.
While certain exemplary embodiments of the present invention have been described above by way of illustration only, it will be apparent to those of ordinary skill in the art that the described embodiments may be modified in various different ways without departing from the spirit and scope of the invention. Accordingly, the drawings and description are illustrative in nature and should not be construed as limiting the scope of the invention.
Claims (9)
1. The utility model provides a foundation ditch extension supporting body, includes extension supporting component and former supporting component, its characterized in that: the extension supporting assembly comprises an extension support (1), the original supporting assembly comprises an original support (2), the extension support (1) is arranged outside the original support (2), the extension support (1) has the same structure as the original support (2), the bottom of the extension support (1) is fixedly connected with an extension base beam (13), the bottom of the extension base beam (13) is fixedly connected with an extension base (11), the bottom of the extension base (11) is fixedly connected with an extension fixing column (12), the top of the extension support (1) is fixedly connected with an extension crown beam (14), four corners of the extension crown beam (14) and the extension base beam (13) are detachably connected with extension connecting angle brackets (15), the bottom of the original support (2) is fixedly connected with the original base beam, and the bottom of the original base beam is fixedly connected with an original base (21), the bottom of the original base (21) is fixedly connected with an original fixing column (22), the top of the original base (21) is fixedly connected with an original crown beam (23), four corners of the original crown beam (23) and the original bottom beam are detachably connected with original connecting angle frames (24) through screws, and four sides of the original support (2) and the extension support (1) are respectively spliced with a main fixing anchor rod (3);
the utility model discloses a fixed anchor rod (3) of fixed anchor rod, including main fixed anchor rod (3), the bottom outside fixedly connected with bottom plate (32), the bottom of bottom plate (32) is rotated and is connected with adjusting nut (4), the inside of main fixed anchor rod (3) is provided with interior fixed rod (5), the inside of interior fixed rod (5) is provided with dead slot (51), movable spout (52) have all been seted up to the both sides wall of dead slot (51), the inside of main fixed anchor rod (3) is provided with the cavity, the middle fixedly connected with and dead slot (51) matched with baffle (33) of cavity, fixed spout (34) have been seted up to the centre of baffle (33), the inside sliding connection of fixed spout (34) has vice fixed anchor rod (6), the tip fixedly connected with connector (61) of vice fixed anchor rod (6).
2. The foundation pit extension support of claim 1, wherein: the top fixedly connected with owner stock head (31) of main fixed stock (3), one end fixedly connected with vice stock head (62) of connector (61) are kept away from to vice fixed stock (6), the shape of owner stock head (31) and vice stock head (62) all sets up to conical shape.
3. The foundation pit extension support of claim 1, wherein: the bottom end of the fixed inner rod (5) is provided with threads, and the fixed inner rod (5) is in threaded connection with the adjusting nut (4).
4. The foundation pit extension support of claim 1, wherein: the both sides wall of fixed spout (34) all seted up with connector (61) matched with spacing groove, vice stock head (62) run through the spacing groove and cooperate with activity spout (52).
5. The foundation pit extension support of claim 1, wherein: the inclination angle of the fixed sliding chute (34) is set to be 45 degrees, and the fixed sliding chute (34) is perpendicular to the movable sliding chute (52).
6. The foundation pit extension support of claim 1, wherein: the quantity of vice fixed stock (6) sets up to a plurality ofly, and is a plurality of vice fixed stock (6) evenly distributed is in the inside of main fixed stock (3), and mutually perpendicular between every two adjacent vice fixed stock (6).
7. The foundation pit extension support of claim 1, wherein: the inner sides of the extension support (1) and the original support (2) are fixedly connected with a fixed cross beam (16), and the fixed cross beam (16) is arranged at the joint of the extension support (1) or the original support (2) and the main fixed anchor rod (3).
8. The foundation pit extension support of claim 1, wherein: the main fixing anchor rods (3) in the extension support (1) and the main fixing anchor rods (3) in the original support (2) are distributed in a staggered mode.
9. A method of installing a foundation pit extension support of a foundation pit extension support, comprising a foundation pit extension support according to any one of claims 1 to 8, characterized in that: the treatment steps are as follows:
the method comprises the following steps: an extension supporting pit is arranged, a curtain pit with a specified depth is arranged at a specified position on the outer side of the original support (2) according to the size to be extended, and a base pile hole is arranged at the bottom of the curtain pit;
step two: pouring an extension support (1), then pouring concrete in the pile hole to form an extension fixing column (12), pouring concrete in the curtain pit to form the extension support (1), and integrally connecting the extension support (1) and the extension fixing column (12);
step three: clearing the extension supporting pit, and excavating soil between the extension bracket (1) and the original bracket (2) to expose the extension bracket (1);
step four: a base is poured, a group of base pile holes are formed in the inner side of the extension support (1), concrete is poured inside the base pile holes to form a new extension fixing column (12), and an extension base (11) is arranged at the top of each base pile hole to enable the extension base (11), the extension fixing column (12) and the extension support (1) to be fixedly connected;
step five: inserting anchor rods, arranging through holes in the extension support (1), enabling the positions of the through holes and the main fixing anchor rods (3) in the original support (2) to be distributed in a staggered mode, enabling the main fixing anchor rods (3) to incline downwards by 45 degrees to penetrate through the through holes and be inserted into soil, then rotating an adjusting nut (4), enabling a fixing inner rod (5) to be drawn back in the main fixing anchor rods (3), and accordingly pushing the auxiliary fixing anchor rods (6) out of the main fixing anchor rods (3) to be in contact with the soil;
step six: dismantling the original support assembly, and leaving the residual main fixed anchor rods (3) in the soil body;
step seven: the fixed extension supporting assembly is characterized in that an extension crown beam (14) is fixedly connected to the top of an extension support (1), an extension base beam (13) is fixedly arranged at the joint of the extension support (1) and an extension base (11), so that a plurality of extension supports (1) are fixedly connected together, and extension connecting corner brackets (15) are fixedly arranged at four corners of the extension base beam (13) and the extension crown beam (14) through screws;
step eight: hide the stock, be close to main fixed stock (3) one end at the inboard of extension support (1) and pour fixed cross beam (16) with concrete to make partly main fixed stock (3) and the interior pole of fixing (5) that leak hide inside fixed cross beam (16), thereby fix main fixed stock (3) on extension support (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210565128.7A CN114737575A (en) | 2022-05-23 | 2022-05-23 | Foundation pit extension support body and foundation pit extension support method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210565128.7A CN114737575A (en) | 2022-05-23 | 2022-05-23 | Foundation pit extension support body and foundation pit extension support method |
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| CN202210565128.7A Pending CN114737575A (en) | 2022-05-23 | 2022-05-23 | Foundation pit extension support body and foundation pit extension support method |
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| CN113006079A (en) * | 2021-02-22 | 2021-06-22 | 河南省远基岩土工程有限公司 | Foundation pit extension support body and foundation pit extension support method |
| CN113550325A (en) * | 2021-07-30 | 2021-10-26 | 陕西忠信建筑安装有限责任公司 | Building foundation pit supporting device and mounting method thereof |
| CN215594055U (en) * | 2021-09-09 | 2022-01-21 | 安徽省建筑工程质量第二监督检测站 | Stake anchor combination bracing underground structure |
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