CN212671008U - Pile column structure for reverse construction method construction - Google Patents
Pile column structure for reverse construction method construction Download PDFInfo
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- CN212671008U CN212671008U CN202021312074.6U CN202021312074U CN212671008U CN 212671008 U CN212671008 U CN 212671008U CN 202021312074 U CN202021312074 U CN 202021312074U CN 212671008 U CN212671008 U CN 212671008U
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Abstract
A pile column structure for reverse construction comprises a vertical column pile and a supporting pile which are arranged from bottom to top; the upright post pile is positioned between the designed pile bottom elevation and the top elevation of the structural foundation; the upright pile comprises a first outer layer steel reinforcement cage and a first concrete layer; the supporting pile is positioned between the top elevation of the structure foundation and the bottom elevation of the designed reverse construction initial layer; the supporting pile column comprises a second outer layer reinforcement cage, an inner layer reinforcement cage and a second concrete layer; the second outer layer reinforcement cage and the first outer layer reinforcement cage are integrally formed, and the upper end of the second outer layer reinforcement cage exceeds the bottom of the designed reverse construction initial layer; the upper end of the inner layer steel reinforcement cage is flush with the upper end of the second outer layer steel reinforcement cage, and the lower end of the inner layer steel reinforcement cage extends into the upright post pile; the first concrete layer and the second concrete layer are integrally cast. The utility model provides a when traditional super high-rise ground, underground structure synchronous construction, the vertical structure load that the engineering exists is big, and the amount of settling is wayward and engineering cost is high technical problem.
Description
Technical Field
The utility model belongs to building engineering construction field, especially a stake structure for reverse construction method construction.
Background
The reverse construction method construction technology gradually becomes one of the main construction processes of underground engineering due to the advantages of high underground space construction work efficiency, good environment protection effect and the like. The vertical supporting system is a key component during the reverse construction of the foundation pit, a steel upright is usually inserted into a pile foundation of a vertical column pile, the vertical column pile mainly utilizes engineering piles, and the steel upright is wrapped with concrete to form a main structure stiff column after the reverse construction stage of the foundation pit is finished. However, for the engineering of the whole or partial synchronous construction of the overground and underground structures, particularly the super high-rise engineering, the vertical structure load is large in the construction stage, a plurality of temporary stand columns need to be arranged if the steel stand columns meet the requirements, and the engineering cost is greatly increased.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a stake structure for reverse construction method construction, when solving traditional superelevation layer ground, underground structure synchronous construction, the vertical structure load that the engineering exists is big, and the settlement volume is wayward and engineering cost is high technical problem.
In order to achieve the above purpose, the utility model adopts the following technical scheme.
A pile column structure for reverse construction is arranged in a foundation pit and at a position corresponding to a structural column of a main body structure; comprises a vertical column pile and a supporting pile which are arranged from bottom to top; the upright post pile is positioned between the designed pile bottom elevation and the top elevation of the structural foundation; the upright post pile comprises a first outer layer steel reinforcement cage and a first concrete layer; the supporting pile is positioned between the top elevation of the structure foundation and the bottom elevation of the designed reverse construction starting layer; the supporting pile column comprises a second outer layer reinforcement cage, an inner layer reinforcement cage and a second concrete layer; the second outer layer reinforcement cage and the first outer layer reinforcement cage are integrally formed, and the upper end of the second outer layer reinforcement cage exceeds the bottom of the designed reverse construction initial layer; the upper end of the inner layer steel reinforcement cage is flush with the upper end of the second outer layer steel reinforcement cage, and the lower end of the inner layer steel reinforcement cage extends into the upright post pile; the second outer layer reinforcement cage is connected with the inner layer reinforcement cage through a connecting rib; the first concrete layer and the second concrete layer are integrally cast;
the pile structure also comprises an outer-wrapped steel mesh and an outer-wrapped concrete; the supporting pile removes and chisels concrete outside the second outer layer reinforcement cage; the outsourcing reinforcing mesh is arranged on the outer side of the second outer layer reinforcing cage and is bound and connected with the second outer layer reinforcing cage; the outer coating concrete is poured on the outer side of the supporting pile; the outer-coated reinforcing mesh is poured in outer-coated concrete.
Preferably, the length of the part of the second outer layer reinforcement cage, which exceeds the bottom of the reverse construction initial layer, is 1000-3000 mm; the length of the part of the inner layer reinforcement cage, which exceeds the bottom of the reverse construction starting layer, is 1000-3000 mm.
Preferably, the length of the inner layer steel reinforcement cage extending into the middle of the upright post pile is 5000-6000 mm.
Preferably, the distance between the outer edge of the first concrete layer and the first outer layer reinforcement cage is not less than 100 mm; and the distance between the outer edge of the second concrete layer and the second outer layer reinforcement cage is not less than 100 mm.
Preferably, the distance between the inner layer steel reinforcement cage and the second outer layer steel reinforcement cage is 80 mm-120 mm.
Preferably, at least two groups of connecting ribs are arranged at intervals along the vertical direction; each group of connecting ribs is arranged at intervals along the circumferential direction; the distance between two adjacent groups of connecting ribs is 500-2000 mm.
Compared with the prior art, the utility model has the following characteristics and beneficial effect.
1. The traditional reverse-construction method upright column usually adopts a steel upright column, such as a lattice column or a steel pipe column; because the upright post is of a hollow structure, the stability is poor, and the size of the section is limited by the model; the upright post part of the middle reverse construction pile column is a reinforced concrete pile, the upright post is of a solid structure, the stability is stronger, the section is not limited, and the concrete and the reinforcing steel bar are simultaneously pressed, so the bearing capacity is higher; under the same conditions, several layers of ground structures can be constructed in multiple directions while the basement is constructed, and the construction period is further shortened.
2. The utility model discloses a pile column structure for reverse construction method construction utilizes the structural style of stand pile + supporting pile, compares with the mode of steel stand + stand pile, and the construction is simple, saves steel, very big reduce cost, and the pile column structural style atress that is used for reverse construction method construction is reasonable, has reduced the absolute settlement volume of whole building, avoids producing too big differential settlement.
3. The utility model provides a pile column structure construction quality for reverse construction method construction changes control, saves interim stand and demolishs the time limit for a project that arouses, avoids interim stand to demolish the pollution that causes and the waste of interim stand stake, and is energy-concerving and environment-protective.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings.
Fig. 1 is the utility model discloses a pile structure for reverse construction method construction sets up the schematic structure in the foundation ditch.
Fig. 2 is a schematic view of the overall structure of the middle upright post and the support post of the present invention.
Fig. 3 is a schematic view of the horizontal section of the support pile according to the present invention.
Fig. 4 is a schematic view of the horizontal tangent plane overall structure of the middle upright post pile of the present invention.
Fig. 5 is a schematic structural view of the present invention in which the outer concrete is provided outside the middle support pile and the outer concrete is rectangular.
Fig. 6 is a schematic structural view of the present invention in which the outer concrete is provided outside the middle support pile, and the outer concrete is elliptical.
Fig. 7 is a schematic structural view of the present invention in which the outer concrete is provided outside the middle support pile and the outer concrete is circular.
Reference numerals: the construction method comprises the following steps of 1-upright post pile, 1.1-first outer layer reinforcement cage, 1.2-first concrete layer, 2-supporting pile column, 2.1-second outer layer reinforcement cage, 2.2-inner layer reinforcement cage, 2.3-second concrete layer, 3-foundation pit, 4-outer wrapping concrete, 5-connecting rib, 6-enclosure structure, 7-structural foundation, 8-outer wrapping reinforcement mesh, 9-main body structure and 10-reverse construction starting layer.
Detailed Description
As shown in fig. 1 to 7, the pile structure for reverse construction is arranged in the foundation pit 3 at a position corresponding to the structural column of the main structure 9; comprises a vertical column pile 1 and a supporting pile 2 which are arranged from bottom to top; the upright post pile 1 is positioned between the designed pile bottom elevation and the top elevation of the structural foundation 7; the upright pile 1 comprises a first outer layer reinforcement cage 1.1 and a first concrete layer 1.2; the support pile 2 is located between the top elevation of the structural foundation 7 and the bottom elevation of the designed reverse construction starting layer 10; the supporting pile column 2 comprises a second outer layer reinforcement cage 2.1, an inner layer reinforcement cage 2.2 and a second concrete layer 2.3; the second outer layer reinforcement cage 2.1 and the first outer layer reinforcement cage 1.1 are integrally formed, and the upper end of the second outer layer reinforcement cage 2.1 exceeds the bottom of the designed reverse construction initial layer 10; the upper end of the inner layer reinforcement cage 2.2 is flush with the upper end of the second outer layer reinforcement cage 2.1, and the lower end of the inner layer reinforcement cage 2.2 extends into the stud pile 1; the second outer layer reinforcement cage 2.1 is connected with the inner layer reinforcement cage 2.2 through a connecting rib 5; the first concrete layer 1.2 and the second concrete layer 2.3 are integrally cast;
the pile structure also comprises an outer-coated reinforcing mesh 8 and an outer-coated concrete 4; the supporting pile column 2 removes concrete outside the second outer layer reinforcement cage 2.1; the outsourcing reinforcing mesh 8 is arranged on the outer side of the second outer layer reinforcing cage 2.1 and is bound and connected with the second outer layer reinforcing cage 2.1; the outer concrete 4 is poured on the outer side of the supporting pile 2; the outer coated reinforcing mesh 8 is poured in the outer coated concrete 4.
In the embodiment, the length of the part of the second outer layer reinforcement cage 2.1, which exceeds the bottom of the reverse construction starting layer 10, is 1000-3000 mm; the length of the part, exceeding the bottom of the reverse construction starting layer 10, of the inner layer reinforcement cage 2.2 is 1000-3000 mm.
In the embodiment, the length of the part, extending into the upright post pile 1, of the inner-layer steel reinforcement cage 2.2 is 5000-6000 mm.
In this embodiment, the distance between the outer edge of the first concrete layer 1.2 and the first outer layer reinforcement cage 1.1 is not less than 100 mm; the distance between the outer edge of the second concrete layer 2.3 and the second outer layer reinforcement cage 2.1 is not less than 100 mm.
In this embodiment, the interval between inlayer steel reinforcement cage 2.2 and the second skin steel reinforcement cage 2.1 is 80mm ~120 mm.
In this embodiment, at least two groups of connecting ribs 5 are arranged at intervals in the vertical direction; each group of connecting ribs 5 is arranged at intervals along the circumferential direction; the distance between two adjacent groups of connecting ribs 5 is 500-2000 mm.
In this embodiment, hooks are respectively arranged at two ends of the connecting rib 5, and the hooks at the two ends are respectively hooked on the second outer-layer reinforcement cage 2.1 and the inner-layer reinforcement cage 2.2; the hook of the connecting rib 5 is respectively connected with the second outer layer reinforcement cage 2.1 and the inner layer reinforcement cage 2.2 in a welding mode.
In this embodiment, the connecting ribs 5 are arranged at each section, and the diameter of the connecting ribs 5 is 16-25 mm.
In this embodiment, the edge line of the horizontal section of the outer concrete 4 is circular, elliptical or rectangular.
The construction method of the pile column structure for reverse construction comprises the following steps.
and 3, constructing a pile structure for reverse construction method at the position of the structural column corresponding to the main structure 9 in the foundation pit 3 to be excavated, raising the pile top elevation of the pile structure for reverse construction method construction to the bottom elevation of the reverse construction starting layer 10, wherein the part above the bottom elevation of the structural foundation 7 is a supporting pile 2, and the part below the bottom elevation of the structural foundation 7 is a vertical pile 1.
And 3.1, constructing the pile structure for the reverse construction method, and mechanically forming holes at first.
And 3.2, manufacturing a reinforcement cage, manufacturing an outer layer reinforcement cage according to the total length of the first outer layer reinforcement cage 1.1 and the second outer layer reinforcement cage, and determining the number and the length of the segments according to specific parameters of construction machinery. And the inner layer reinforcement cage is independently bound and formed, and is fixedly connected with the first outer layer reinforcement cage 1.1 through the connecting rib 5 after the binding is finished.
And 3.3, hoisting the reinforcement cage into the drill hole and connecting the reinforcement cage into a whole.
And 3.4, pouring concrete, wherein the first concrete layer 1.2 and the second concrete layer 2.3 are integrally poured and formed.
And 4, sequentially defining the floors of the main structure 9 below the reverse construction starting layer 10 as a B1 layer and a B2 layer … … BN layer, sequentially defining the floors above the reverse construction starting layer 10 as a 1 layer and a 2 layer … … N layer, and excavating the earth of the foundation pit 3 to the reverse construction starting layer 10 after the pile structure for reverse construction reaches the strength.
And 5, constructing a structural floor slab of the main structure 9 at the reverse construction starting layer 10.
And 6, after the structural floor of the main structure 9 at the position of the reverse construction starting layer 10 reaches the strength, sequentially constructing B1-BN layers from top to bottom, and constructing 1-N layers from bottom to top at the same time until the construction is finished.
In the embodiment, in the step 6, B1-BN layers are sequentially constructed from top to bottom, and in the process of constructing 1-N layers from bottom to top, before the raft of the structural foundation 7 is completed and the strength is reached, the number of construction layers above the reverse construction starting layer 10 does not exceed the number of construction layers required by the design.
In this embodiment, in step 6, in the process of constructing the B1 layer, the concrete outside the second outer layer reinforcement cage 2.1 is chiseled, the outer covering reinforcement mesh 8 is bound to the outside of the second outer layer reinforcement cage 2.1, and then the outer covering concrete 4 is poured; constructing the B2-layer-structure foundation 7 according to the process construction flow of constructing the B1 layer.
In this embodiment, the reverse construction starting layer 10 is generally disposed at the position of the top plate of the first underground layer or the position of the top plate of the second underground layer; the reverse construction method is mainly used for the ultra-deep foundation pit, and the distance between the reverse construction starting layer 10 and the structural foundation 7 is generally 2-4 layers.
In this embodiment, also can set up the slip casting pipe between outer steel reinforcement cage 13 and the inlayer steel reinforcement cage 14, improve pile foundation bearing capacity, satisfy the requirement of vertical load.
The above embodiments are not exhaustive of the specific embodiments, and other embodiments are possible, and the above embodiments are intended to illustrate, but not limit the scope of the present invention, and all applications coming from the simple changes of the present invention fall within the scope of the present invention.
Claims (6)
1. A pile column structure for reverse construction is arranged in a foundation pit (3) at a position corresponding to a structural column of a main structure (9); the method is characterized in that: comprises a vertical column pile (1) and a supporting pile (2) which are arranged from bottom to top; the upright post pile (1) is positioned between the designed pile bottom elevation and the top elevation of the structural foundation (7); the upright post pile (1) comprises a first outer layer reinforcement cage (1.1) and a first concrete layer (1.2); the support pile (2) is positioned between the top elevation of the structural foundation (7) and the bottom elevation of the designed reverse construction starting layer (10); the supporting pile column (2) comprises a second outer layer reinforcement cage (2.1), an inner layer reinforcement cage (2.2) and a second concrete layer (2.3); the second outer layer reinforcement cage (2.1) and the first outer layer reinforcement cage (1.1) are integrally formed, and the upper end of the second outer layer reinforcement cage (2.1) exceeds the bottom of the designed reverse construction initial layer (10); the upper end of the inner layer reinforcement cage (2.2) is flush with the upper end of the second outer layer reinforcement cage (2.1), and the lower end of the inner layer reinforcement cage (2.2) extends into the stud pile (1); the second outer layer reinforcement cage (2.1) is connected with the inner layer reinforcement cage (2.2) through a connecting rib (5); the first concrete layer (1.2) and the second concrete layer (2.3) are integrally cast;
the pile structure also comprises an outer-coated reinforcing mesh (8) and an outer-coated concrete (4); the concrete outside the second outer layer reinforcement cage (2.1) is removed by the supporting pile column (2); the outsourcing reinforcing mesh (8) is arranged on the outer side of the second outer layer reinforcing cage (2.1) and is bound and connected with the second outer layer reinforcing cage (2.1); the outer concrete (4) is poured on the outer side of the supporting pile (2); the outer-coated reinforcing mesh (8) is poured in the outer-coated concrete (4).
2. The pile structure for reverse construction according to claim 1, wherein: the length of the part, exceeding the bottom of the reverse construction initial layer (10), of the second outer layer reinforcement cage (2.1) is 1000-3000 mm; the length of the part, exceeding the bottom of the reverse construction starting layer (10), of the inner layer reinforcement cage (2.2) is 1000-3000 mm.
3. The pile structure for reverse construction according to claim 1, wherein: the length of the inner layer steel reinforcement cage (2.2) extending into the middle of the upright post pile (1) is 5000-6000 mm.
4. The pile structure for reverse construction according to claim 1, wherein: the distance between the outer edge of the first concrete layer (1.2) and the first outer layer reinforcement cage (1.1) is not less than 100 mm; the distance between the outer edge of the second concrete layer (2.3) and the second outer steel reinforcement cage (2.1) is not less than 100 mm.
5. The pile structure for reverse construction according to claim 1, wherein: the interval between inlayer steel reinforcement cage (2.2) and second skin steel reinforcement cage (2.1) is 80mm ~120 mm.
6. The pile structure for reverse construction according to claim 5, wherein: at least two groups of connecting ribs (5) are arranged at intervals along the vertical direction; each group of connecting ribs (5) is arranged at intervals along the circumferential direction; the distance between two adjacent groups of connecting ribs (5) is 500-2000 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021312074.6U CN212671008U (en) | 2020-07-07 | 2020-07-07 | Pile column structure for reverse construction method construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021312074.6U CN212671008U (en) | 2020-07-07 | 2020-07-07 | Pile column structure for reverse construction method construction |
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| Publication Number | Publication Date |
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| CN212671008U true CN212671008U (en) | 2021-03-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202021312074.6U Active CN212671008U (en) | 2020-07-07 | 2020-07-07 | Pile column structure for reverse construction method construction |
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| CN (1) | CN212671008U (en) |
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- 2020-07-07 CN CN202021312074.6U patent/CN212671008U/en active Active
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