CN111236256B - Cable-stayed overhanging type upright post-free deep foundation pit inner supporting system and installation method - Google Patents
Cable-stayed overhanging type upright post-free deep foundation pit inner supporting system and installation method Download PDFInfo
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- CN111236256B CN111236256B CN202010157911.0A CN202010157911A CN111236256B CN 111236256 B CN111236256 B CN 111236256B CN 202010157911 A CN202010157911 A CN 202010157911A CN 111236256 B CN111236256 B CN 111236256B
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- 238000000034 method Methods 0.000 title claims description 17
- 238000009434 installation Methods 0.000 title description 3
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 136
- 239000010959 steel Substances 0.000 claims abstract description 136
- 230000000712 assembly Effects 0.000 claims abstract description 14
- 238000000429 assembly Methods 0.000 claims abstract description 14
- 239000011148 porous material Substances 0.000 claims description 13
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 8
- 238000005266 casting Methods 0.000 claims description 2
- 239000002689 soil Substances 0.000 abstract description 4
- 230000002265 prevention Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 6
- 239000004567 concrete Substances 0.000 description 2
- 238000004873 anchoring Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
Classifications
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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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- Mining & Mineral Resources (AREA)
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- General Engineering & Computer Science (AREA)
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Abstract
The invention provides a cable-stayed cantilever type upright post-free deep foundation pit inner support system, which comprises: the cable-stayed steel strand assembly comprises a plurality of guard piles, a plurality of anti-pulling piles, a plurality of cantilever beams, a crown beam, a ring support, a plurality of cable-stayed steel strand assemblies and a plurality of tower columns; the anti-pulling pile is arranged on the outer side of the guard pile; the crown beam is fixedly connected with the top of the fender post; the cantilever beams are fixedly connected with the tops of the fender piles, the tops of the uplift piles and the crown beams, and one end of each cantilever beam extends towards the inner side of each fender pile; one end of the ring support, which is fixedly connected with the inner side of the cantilever beam; the steel bars at the bottoms of the plurality of tower columns are used for fixing the tops of the set fender piles; and part of the cable-stayed steel strand assemblies are adjustably connected with the tower column and the cantilever beam, and the rest of the cable-stayed steel strand assemblies are adjustably connected with the tower column and the ring support. The foundation pit bottom soil disturbance prevention device has the advantages that the upright posts and the upright post piles can be omitted, and the disturbance to the soil body in the foundation pit bottom is completely avoided.
Description
Technical Field
The invention discloses a cable-stayed cantilever type upright-post-free deep foundation pit inner support system, and belongs to the technical field of underground engineering foundation pit support.
Background
Along with comprehensive development of urban underground space resources, more comprehensive pipe galleries and tunnel traffic pass through urban deep underground space, so that when underground space development is carried out, a foundation pit support system needs to reduce the influence on the deep underground space as much as possible or avoid the influence range of the existing deep buildings, and meanwhile, a temporary structure in foundation pit support engineering is prevented from becoming a new obstacle for urban underground space development. Particularly, the support upright post and the upright post pile in the foundation pit are often positioned at a deep position below the pit bottom, and the pile end is very easy to become an obstacle in the deep space of the underground.
Disclosure of Invention
The invention aims to solve the problem of providing a cable-stayed cantilever type upright post-free deep foundation pit inner support system which can avoid the disturbance to the soil body at the bottom of the foundation pit completely without arranging upright posts and upright post piles and overcomes the defects of the prior art.
The invention provides a cable-stayed cantilever type upright post-free deep foundation pit inner support system, which comprises: the pile comprises a plurality of guard piles 1, a plurality of anti-pulling piles 2, a plurality of cantilever beams 3, crown beams 4, a ring support 5, a plurality of cable-stayed steel strand assemblies and a plurality of tower columns 7; the uplift pile 2 is arranged on the outer side of the guard pile 1; the crown beam 4 is fixedly connected with the top of the fender post 1; the cantilever beams 3 are fixedly connected with the top of the fender post 1, the top of the uplift pile 2 and the crown beam 4, and one end of each cantilever beam 3 extends towards the inner side of the fender post 1; one end of the ring support 5, which is fixedly connected with the inner side of the cantilever beam 3; the steel bars at the bottoms of the tower columns 7 are fixed at the tops of the set fender piles 1; part of the cable-stayed steel strand assemblies are adjustably connected with the tower column 7 and the cantilever beam 3, and the rest of the cable-stayed steel strand assemblies are adjustably connected with the tower column 7 and the ring support 5.
Further, the invention provides a cable-stayed cantilever type upright post-free deep foundation pit inner support system, which can also have the following characteristics: the cable-stayed steel strand assembly includes: the cable-stayed steel strand 6, a steel strand collecting regulator 9, a locking port anchor backing plate 10 and a locking clamp 12; the fore shaft anchor backing plate 10 is fixed at the bottoms of the cantilever beam 3 and the circular ring support 5, and the fore shaft anchor backing plate 10 is provided with a plurality of holes; the cable-stayed steel strand 6 passes through one hole of the fore shaft anchor backing plate 10, namely a pore canal of the cantilever beam 3 or a pore canal of the circular ring support 5, namely a pore canal of the tower column 7, and passes through the other hole of the fore shaft anchor backing plate 10; the locking clamp 12 fixes two ends of the cable-stayed steel strand 6 at the lower part of the locking port anchor backing plate 10; the steel strand collecting adjuster 9 is arranged on the cable-stayed steel strand 6 and adjusts the prestress of the cable-stayed steel strand 6.
Further, the invention provides a cable-stayed cantilever type upright post-free deep foundation pit inner support system, which can also have the following characteristics: the tower 7 has a steel tube plate 11; the steel tube plate 11 is cast inside the tower 7, or the steel tube plate 11 is fixed to the side of the tower 7 by fixing rivets 13.
Further, the invention provides a cable-stayed cantilever type upright post-free deep foundation pit inner support system, which can also have the following characteristics: the depth of the fender post 1 with the tower column 7 arranged at the top is deeper than the depth of the fender posts 1 with the rest of the tower columns 7; the depth of the uplift pile 2 connected with the same cantilever beam 3 with the set guard pile 1 is deeper than the depth of the rest uplift piles 2.
Further, the invention provides a cable-stayed cantilever type upright post-free deep foundation pit inner support system, which can also have the following characteristics: the crown beam 4 is square; the cantilever beam 3 is a variable cross-section cantilever beam.
Further, the invention provides a cable-stayed cantilever type upright post-free deep foundation pit inner support system, which can also have the following characteristics: the crown beam 4 also comprises a number of gussets 8;
two ends of the reinforcing steel bars of the angle brace 8 are fixedly connected with the reinforcing steel bars on two sides of the crown beam 4; the angle brace 8 is also fixedly connected with the steel bars of the staggered cantilever beams 3.
In addition, the invention also provides a method for installing the inclined cantilever type upright post-free deep foundation pit inner support system, which comprises the following steps: the method comprises the following steps:
step A, arranging the periphery of a foundation pit by a plurality of fender posts 1, wherein the positions of the fender posts 1 are matched with the shape of a crown beam 4; the uplift pile 2 is arranged outside the fender pile 1.
Step B comprises the steps of:
and B-1, fixedly connecting the steel bars of the crown beam 4 with the reserved steel bars at the top of the fender post 1.
B-2, fixedly connecting the steel bars of the cantilever beams 3 with the reserved steel bars at the top of the fender post 1, the reserved steel bars at the top of the uplift pile 2 and the steel bars of the crown beam 4, wherein one ends of the steel bars of the cantilever beams 3 extend to the inner side of the fender post 1;
and B-3, fixedly connecting the steel bars of the ring support 5 with one end of the inner side of the steel bars of the cantilever beam 3.
And C, fixing the preset reinforcing steel bars at the tops of the fender posts 1 at the bottoms of the plurality of tower columns 7.
Wherein step B and step C are not sequential.
Step D, casting the reserved steel bars at the top of the guard pile 1, the reserved steel bars at the top of the anti-pulling pile 2, the steel bars of the cantilever beam 3, the steel bars of the crown beam 4, the steel bars of the ring support 5 and the steel bars at the bottom of the tower column 7 together;
and E, connecting a plurality of cable-stayed steel strand assemblies with the tower column 7 and the cantilever beam 3, and connecting a plurality of cable-stayed steel strand assemblies with the tower column 7 and the ring support 5.
Furthermore, the invention provides a method for installing the inclined cantilever type upright post-free deep foundation pit inner support system, which can also have the following characteristics: in the step E, a fore shaft anchor backing plate 10 of the cable-stayed steel strand assembly is fixed at the bottom of the cantilever beam 3 or the circular ring support 5, and the fore shaft anchor backing plate 10 is provided with a plurality of holes; the cable-stayed steel strand 6 of the cable-stayed steel strand assembly passes through one hole of the locking port anchor backing plate 10, namely a hole channel of the cantilever beam 3 or a hole channel of the circular ring support 5, namely a hole channel of the tower column 7, and passes through the other hole of the locking port anchor backing plate 10; the locking clamp 12 fixes two ends of the cable-stayed steel strand 6 at the lower part of the locking port anchor backing plate 10; the steel strand collecting adjuster 9 is arranged on the cable-stayed steel strand 6 and adjusts the prestress of the cable-stayed steel strand 6.
Furthermore, the invention provides a method for installing the inclined cantilever type upright post-free deep foundation pit inner support system, which can also have the following characteristics: the tower 7 has a steel tube plate 11; the steel tube plate 11 is cast inside the tower 7, or the steel tube plate 11 is fixed to the side of the tower 7 by fixing rivets 13.
Furthermore, the invention provides a method for installing the inclined cantilever type upright post-free deep foundation pit inner support system, which can also have the following characteristics: and a pore canal is reserved when the cantilever beam 3 and the ring support 5 are poured.
The invention provides a cable-stayed overhanging type upright post-free deep foundation pit inner supporting system, a guard pile at the periphery of a foundation pit, a concrete crown beam at the top of the guard pile and a pulling-resistant pile at the outer side of the guard pile; the uplift pile is connected with the guard pile through a variable cross section cantilever beam, and the inner ring support of the foundation pit is integrally poured with the crown beam through the variable cross section cantilever beam and is stressed together; the cable-stayed steel strand is connected with the circular support through a circular support embedded anchor backing plate, and the self weight of the circular support is transferred to the concrete tower column; the dead weight of the ring support transferred to the tower column is transferred to the uplift pile by the steel strand or the section steel; the soil pressure around the foundation pit is transmitted to the ring support through the crown beam and the variable cross section cantilever beam, and the self weight of the ring support is transmitted to the tower column and the anti-pulling pile through the cable-stayed steel strand and the variable cross section cantilever beam; the upright posts and the upright post piles in the foundation pit are all canceled, so that the existing building or planning structure at the bottom of the foundation pit can be effectively avoided, and the technical problem under the related condition of foundation pit engineering is solved.
Drawings
FIG. 1 is a plan view of a diagonal cantilever type column-free deep foundation pit inner support system.
Fig. 2 is a cross-sectional view of a diagonal cantilever type column-free deep foundation pit inner support system.
Fig. 3 is a schematic diagram of a connection structure of a cable-stayed steel strand assembly and a cantilever beam, and a ring support.
Fig. 4 is a schematic diagram of a connection structure between a cable-stayed steel strand assembly and a tower.
Fig. 5 is a schematic diagram of another connection structure between a cable-stayed steel strand assembly and a tower.
Detailed Description
The invention is further described below with reference to the drawings and specific examples.
FIG. 1 is a plan view of a diagonal cantilever type column-free deep foundation pit inner support system.
Fig. 2 is a cross-sectional view of a diagonal cantilever type column-free deep foundation pit inner support system.
As shown in fig. 1 and 2, the diagonal cantilever type upright-free deep foundation pit inner support system comprises: the pile comprises a plurality of fender piles 1, a plurality of anti-pulling piles 2, a plurality of cantilever beams 3, crown beams 4, a ring support 5, a plurality of cable-stayed steel strand assemblies and a plurality of tower columns 7. In fig. 1, a building 15 is protected underground.
The guard piles 1 are arranged at the periphery of the foundation pit, the guard piles 1 form a square shape in the embodiment, and the shape of the guard piles is matched with the shape of the crown beam 4, and the crown Liang Zhedang above the guard piles in fig. 1 cannot be displayed. The uplift pile 2 is arranged outside the fender pile 1. The guard pile 1 and the anti-pulling pile 2 can be constructed simultaneously, and the guard pile and the anti-pulling pile can be cast-in-place piles or precast piles, and anchoring steel bars are reserved at the top.
The steel bars of the crown beam 4 are welded and fixed with the reserved steel bars at the top of the fender post 1. In this embodiment, the crown beam 4 has a square body, and the crown beam 4 further has four gussets 8. The two ends of the reinforcing steel bars of the four corner supports 8 are fixedly connected with the reinforcing steel bars on the two sides of the crown beam 4 to form a whole. The fender piles 1 can be arranged below the four corner supports 8, and can be set according to stress requirements without being arranged.
The cantilever beam 3 in the embodiment is a variable cross-section cantilever beam. The steel bars of the cantilever beams 3 are fixedly connected with the tops of the guard piles 1, the anti-pulling piles 2 and the crown beams 4; of course also comprising gussets 8. One end of the cantilever beam 3 extends to the inner side of the fender post 1.
The steel bar of the ring support 5 is fixedly connected with one end of the steel bar at the inner side of the cantilever beam 3.
In this embodiment, the number of the tower columns 7 is four, and the tower columns 7 are respectively arranged above the fender posts 1 positioned at the four-side center positions of the crown beam 4. The depth of the four fender posts 1 provided with the tower posts 7 is greater than the depth of the other fender posts 1. The depth of the four anti-pulling piles 2 connected with the same cantilever beam 3 with the set guard pile 1 is deeper than the depth of the rest anti-pulling piles 2. The steel bars of the tower column 7 are welded with the steel bars of the fender post 1, and are inserted into the steel bar cage of the fender post 1.
The steel bars reserved at the top of the guard pile 1, the steel bars reserved at the top of the uplift pile 2, the steel bars of the cantilever beam 3, the steel bars of the crown beam 4, the steel bars of the ring support 5 and the steel bars at the bottom of the tower column 7 are poured together to form a whole.
During casting, the cantilever beam 3 and the annular support 5 are embedded with the locking notch anchor backing plate 10 of the steel strand at the hanging point, and a pore canal is reserved. Of course, the locking port anchor backing plate 10 can be fixed at the hanging point positions of the cantilever beam 3 and the ring support 5 through the fixing rivet 13.
One part of the cable-stayed steel strand assemblies is adjustably connected with the tower column 7 and the cantilever beam 3, and the other part of the cable-stayed steel strand assemblies is adjustably connected with the tower column 7 and the ring support 5.
Fig. 3 is a schematic diagram of a connection structure of a cable-stayed steel strand assembly and a cantilever beam, and a ring support.
Fig. 4 is a schematic diagram of a connection structure between a cable-stayed steel strand assembly and a tower.
As shown in fig. 3 and 4, the cable-stayed steel strand assembly includes: the cable-stayed steel strand 6, a steel strand collecting regulator 9, a locking port anchor backing plate 10 and a locking clamp 12.
The fore shaft anchor backing plate 10 is fixed in the bottom of cantilever beam 3 and ring brace 5, and fore shaft anchor backing plate 10 has a plurality of holes. The cable-stayed steel strand 6 passes through one hole of the fore shaft anchor backing plate 10, namely the pore canal of the cantilever beam 3 or the pore canal of the circular ring support 5, namely the pore canal of the tower column 7, and passes out of the other hole of the fore shaft anchor backing plate 10. The locking clamp 12 fixes the two ends of the cable-stayed steel strand 6 at the lower part of the locking port anchor backing plate 10. The steel strand collecting adjuster 9 is arranged on the cable-stayed steel strand 6, collects the steel strands at the same lifting point and adjusts the prestress.
As shown in fig. 4, the tower 7 has a steel tube plate 11; the steel tube plate 11 is embedded in the reinforced concrete of the tower column 7. The cable-stayed steel strand 6 passes through the pore canal of the steel tube plate 11.
Fig. 5 is a schematic diagram of another connection structure between a cable-stayed steel strand assembly and a tower.
As shown in fig. 5, another tower 7 structure is provided, steel tube plates 11 are semicircular channels, and are anchored to two sides of the tower 7 through fixing rivets 13. The two tower columns have different stress states and can be preferably used according to the stress angle of the cable-stayed steel strand.
The installation method of the inclined cantilever type upright post-free deep foundation pit inner supporting system comprises the following steps: the method comprises the following steps:
step A, arranging the periphery of a foundation pit by a plurality of fender posts 1, wherein the positions of the fender posts 1 are matched with the shape of a crown beam 4; the uplift pile 2 is arranged outside the fender pile 1.
Step B comprises the steps of:
and B-1, fixedly connecting the steel bars of the crown beam 4 with the reserved steel bars at the top of the fender post 1.
B-2, fixedly connecting the steel bars of the cantilever beams 3 with the reserved steel bars at the top of the fender post 1, the reserved steel bars at the top of the uplift pile 2 and the steel bars of the crown beam 4, wherein one ends of the steel bars of the cantilever beams 3 extend to the inner side of the fender post 1;
and B-3, fixedly connecting the steel bars of the ring support 5 with one end of the inner side of the steel bars of the cantilever beam 3.
And C, fixing the preset reinforcing steel bars at the tops of the fender posts 1 at the bottoms of the plurality of tower columns 7.
Wherein step B and step C are not sequential.
Step D, casting the reserved steel bars at the top of the guard pile 1, the reserved steel bars at the top of the anti-pulling pile 2, the steel bars of the cantilever beam 3, the steel bars of the crown beam 4, the steel bars of the ring support 5 and the steel bars at the bottom of the tower column 7 together; and a pore canal is reserved when the cantilever beam 3 and the ring support 5 are poured.
And E, connecting a plurality of cable-stayed steel strand assemblies with the tower column 7 and the cantilever beam 3, and connecting a plurality of cable-stayed steel strand assemblies with the tower column 7 and the ring support 5.
The fore shaft anchor backing plate 10 of the cable-stayed steel strand assembly is fixed at the bottom of the cantilever beam 3 or the circular ring support 5, and the fore shaft anchor backing plate 10 is provided with a plurality of holes;
the cable-stayed steel strand 6 of the cable-stayed steel strand assembly passes through one hole of the locking port anchor backing plate 10, namely a hole channel of the cantilever beam 3 or a hole channel of the circular ring support 5, namely a hole channel of the tower column 7, and passes through the other hole of the locking port anchor backing plate 10;
the locking clamp 12 fixes two ends of the cable-stayed steel strand 6 at the lower part of the locking port anchor backing plate 10;
the steel strand collecting adjuster 9 is arranged on the cable-stayed steel strand 6 and adjusts the prestress of the cable-stayed steel strand 6.
While the present invention has been described in detail through the foregoing description of the preferred embodiment, it should be understood that the foregoing description is not to be considered as limiting the invention.
Claims (8)
1. The utility model provides a support system in inclined-pull cantilever type does not have stand deep basal pit which characterized in that: the anti-pulling pile comprises a plurality of guard piles (1), a plurality of anti-pulling piles (2), a plurality of overhanging beams (3), a crown beam (4), a ring support (5), a plurality of cable-stayed steel strand assemblies and a plurality of tower columns (7);
wherein the uplift pile (2) is arranged on the outer side of the guard pile (1);
the crown beam (4) is fixedly connected with the top of the fender post (1);
the cantilever beams (3) are fixedly connected with the tops of the fender piles (1), the tops of the uplift piles (2) and the crown beams (4), and one ends of the cantilever beams (3) extend to the inner sides of the fender piles (1);
one end of the ring support (5) which is fixedly connected with the inner side of the cantilever beam (3);
the steel bars at the bottoms of the tower columns (7) are used for fixing the tops of the set fender piles (1);
part of the cable-stayed steel strand assemblies are adjustably connected with the tower column (7) and the cantilever beam (3), and the rest of the cable-stayed steel strand assemblies are adjustably connected with the tower column (7) and the ring support (5);
wherein, draw steel strand assembly to one side includes: the device comprises a cable-stayed steel strand (6), a steel strand collecting regulator (9), a locking port anchor backing plate (10) and a locking clamp (12);
the locking port anchor backing plate (10) is fixed at the bottoms of the cantilever beam (3) and the circular ring support (5), and the locking port anchor backing plate (10) is provided with a plurality of holes;
the cable-stayed steel strand (6) passes through one hole of the fore shaft anchor backing plate (10), a pore canal of the cantilever beam (3) or a pore canal of the circular ring support (5), a pore canal of the tower column (7), and passes through the other hole of the fore shaft anchor backing plate (10);
the locking clamp (12) is used for fixing two ends of the cable-stayed steel strand (6) at the lower part of the locking port anchor backing plate (10);
the steel strand collecting adjuster (9) is arranged on the cable-stayed steel strand (6) and is used for adjusting the prestress of the cable-stayed steel strand (6);
wherein the depth of the fender post (1) with the tower column (7) arranged at the top is deeper than the depth of the rest fender posts (1);
the depth of the uplift pile (2) connected with the same cantilever beam (3) with the set guard pile (1) is deeper than the depth of the rest uplift piles (2).
2. The cable-stayed cantilever type upright-free deep foundation pit inner support system according to claim 1, wherein:
wherein the tower (7) has a steel tube plate (11);
the steel tube plates (11) are cast inside the tower column (7), or the steel tube plates (11) are fixed on the side face of the tower column (7) through fixing rivets (13).
3. The cable-stayed cantilever type upright-free deep foundation pit inner support system according to claim 1, wherein:
wherein the crown beam (4) is square; the cantilever beam (3) is a variable cross-section cantilever beam.
4. The cable-stayed cantilever type upright-free deep foundation pit inner support system according to claim 1, wherein:
wherein the crown beam (4) further comprises a plurality of gussets (8);
two ends of the reinforcing steel bars of the angle brace (8) are fixedly connected with the reinforcing steel bars on two sides of the crown beam (4); the angle brace (8) is fixedly connected with the steel bars which are staggered with the cantilever beam (3).
5. The method for installing the inclined cantilever type upright-free deep foundation pit inner support system according to claim 1, wherein the method comprises the following steps: the method comprises the following steps:
step A, arranging the periphery of a foundation pit by a plurality of fender posts (1), wherein the positions of the fender posts (1) are matched with the shape of a crown beam (4); the anti-pulling pile (2) is arranged on the outer side of the guard pile (1);
step B comprises the steps of:
b-1, fixedly connecting the steel bars of the crown beam (4) with the reserved steel bars at the top of the fender post (1);
b-2, fixedly connecting the steel bars of the cantilever beams (3) with the reserved steel bars at the top of the fender post (1), the reserved steel bars at the top of the uplift post (2) and the steel bars of the crown beam (4), wherein one ends of the steel bars of the cantilever beams (3) extend to the inner side of the fender post (1);
b-3, fixedly connecting the steel bars of the circular ring support (5) with one end of the inner side of the steel bars of the cantilever beam (3);
c, fixing preset steel bars at the tops of the fender posts (1) by the steel bars at the bottoms of the tower columns (7);
wherein step B and step C are not sequential;
step D, casting together the reserved steel bars at the top of the guard pile (1), the reserved steel bars at the top of the uplift pile (2), the steel bars of the cantilever beam (3), the steel bars of the crown beam (4), the steel bars of the ring support (5) and the steel bars at the bottom of the tower column (7);
and E, connecting a plurality of cable-stayed steel strand assemblies with the tower column (7) and the cantilever beam (3), and connecting a plurality of cable-stayed steel strand assemblies with the tower column (7) and the ring support (5).
6. The method for installing the cable-stayed cantilever type upright-free deep foundation pit inner support system according to claim 5, wherein the method comprises the following steps:
in the step E, the fore shaft anchor backing plate (10) of the cable-stayed steel strand assembly is fixed at the bottom of the cantilever beam (3) or the circular ring support (5), and the fore shaft anchor backing plate (10) is provided with a plurality of holes;
the cable-stayed steel strand (6) of the cable-stayed steel strand assembly passes through one hole of the fore shaft anchor backing plate (10), a hole of the cantilever beam (3) or a hole of the circular ring support (5), a hole of the tower column (7) and passes through the other hole of the fore shaft anchor backing plate (10);
the locking clamp (12) is used for fixing two ends of the cable-stayed steel strand (6) at the lower part of the locking port anchor backing plate (10);
the steel strand collecting adjuster (9) is arranged on the cable-stayed steel strand (6) and adjusts the prestress of the cable-stayed steel strand (6).
7. The method for installing the cable-stayed cantilever type upright-free deep foundation pit inner support system according to claim 6, wherein the method comprises the following steps:
the tower (7) has a steel tube plate (11);
the steel tube plates (11) are cast inside the tower column (7), or the steel tube plates (11) are fixed on the side face of the tower column (7) through fixing rivets (13).
8. The method for installing the cable-stayed cantilever type upright-free deep foundation pit inner support system according to claim 6, wherein the method comprises the following steps:
and a pore canal is reserved when the cantilever beam (3) and the circular ring support (5) are poured.
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| CN202010157911.0A CN111236256B (en) | 2020-03-09 | 2020-03-09 | Cable-stayed overhanging type upright post-free deep foundation pit inner supporting system and installation method |
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| CN202010157911.0A CN111236256B (en) | 2020-03-09 | 2020-03-09 | Cable-stayed overhanging type upright post-free deep foundation pit inner supporting system and installation method |
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| CN114032921B (en) * | 2021-12-11 | 2022-06-17 | 中亿建业集团有限公司 | Deep foundation pit and construction method thereof |
| CN116065623B (en) * | 2022-11-28 | 2025-05-23 | 上海核工程研究设计院股份有限公司 | Cantilever component template construction method and cantilever component construction method |
| CN116136093A (en) * | 2023-03-31 | 2023-05-19 | 广东省重工建筑设计院有限公司 | Foundation pit supporting device |
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| CN211849482U (en) * | 2020-03-09 | 2020-11-03 | 中船勘察设计研究院有限公司 | Cable-stayed overhanging type column-free deep foundation pit inner supporting system |
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| WO2013123383A1 (en) * | 2012-02-16 | 2013-08-22 | Belinsky Sidney | Stationary positioned offshore windpower plant (owp) and the methods and means for its assembling,transportation, installation and servicing |
| CN103266574A (en) * | 2013-05-02 | 2013-08-28 | 浙江大学 | Simply-supported box girder bridge strengthening method with oblique cables |
| CN203514326U (en) * | 2013-11-01 | 2014-04-02 | 浙江万华建设有限公司 | Connection structure of fish-bellied steel truss of foundation pit |
| CN110258802A (en) * | 2019-05-31 | 2019-09-20 | 东南大学 | A kind of Ultra-Long Spans spoke type suspended-dome structure based on flying swallow truss arch |
| CN110512866A (en) * | 2019-08-14 | 2019-11-29 | 中交二航局第四工程有限公司 | A kind of constructing structure being used to support beam and construction method |
| CN211849482U (en) * | 2020-03-09 | 2020-11-03 | 中船勘察设计研究院有限公司 | Cable-stayed overhanging type column-free deep foundation pit inner supporting system |
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