CN117287056A - Construction method of existing two-layer basement engineering pile - Google Patents
Construction method of existing two-layer basement engineering pile Download PDFInfo
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- CN117287056A CN117287056A CN202210686885.XA CN202210686885A CN117287056A CN 117287056 A CN117287056 A CN 117287056A CN 202210686885 A CN202210686885 A CN 202210686885A CN 117287056 A CN117287056 A CN 117287056A
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- 238000010276 construction Methods 0.000 title claims abstract description 61
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 14
- 238000005553 drilling Methods 0.000 claims description 9
- 230000004888 barrier function Effects 0.000 claims description 5
- 238000009415 formwork Methods 0.000 claims description 4
- 230000006837 decompression Effects 0.000 claims description 3
- 238000001556 precipitation Methods 0.000 claims description 3
- 230000003014 reinforcing effect Effects 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 238000002955 isolation Methods 0.000 claims description 2
- 239000011150 reinforced concrete Substances 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 7
- 238000009412 basement excavation Methods 0.000 description 4
- 238000004134 energy conservation Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000001143 conditioned effect Effects 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000009418 renovation Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G23/00—Working measures on existing buildings
- E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
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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
- E02D5/22—Piles
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G23/00—Working measures on existing buildings
- E04G23/08—Wrecking of buildings
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Paleontology (AREA)
- General Engineering & Computer Science (AREA)
- Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
Abstract
The invention relates to a construction method of an existing two-layer basement engineering pile, which is used for the obstacle-removing construction of an existing basement structure and an original enclosure structure, wherein the existing basement structure is arranged in the original enclosure structure, the existing basement structure comprises a first layer of underground and a second layer of underground, the bottom of the second layer of underground is provided with the original engineering pile, the construction method adopts a mode of combining the obstacle-removing construction of the existing basement and the engineering pile construction, and the construction difficulty of the engineering pile is treated through two-stage construction, namely the engineering pile is respectively constructed on a top plate and a bottom plate of the existing basement, so that the problem is solved. Compared with the prior art, the invention has the advantages of good construction effect, high efficiency and the like.
Description
Technical Field
The invention relates to the field of basement construction, in particular to a construction method of existing two-layer basement engineering piles.
Background
With the advancement of the urban process, urban space is increasingly crowded and land used is intense. Correspondingly, a large number of old buildings which are built in the central urban area and are old in age exist, and the building functions cannot meet the current use requirements and the current standard requirements of fire protection, energy conservation and the like. Therefore, the renovation and demolition reconstruction projects of old buildings are increasingly increased. But the old building reconstruction and underground space development of the central urban area need to face the difficult problems of underground obstacle removal and surrounding environment protection. Basement structures, engineering piles, building enclosures and the like of existing buildings often form barriers for developing new underground spaces, and continuous process and technical innovation are required for how to process the new underground spaces.
At present, the treatment method for shallow buried foundations, underground old basements and engineering piles with complex surrounding environments is usually to remove the whole obstacle, remove the obstacle and backfill the obstacle, and then construct the engineering piles and the guard piles in the new underground space. The demolition reconstruction causes multiple enclosure and multiple excavation to bring superimposed negative effects to the surrounding environment, and simultaneously, the construction cost and the construction period of the engineering construction are increased. The whole dismantling of the two old existing basements in the underground under the condition of complex surrounding environment has huge economic and technical barriers, feasibility and operability are not always existed, and the traditional method for removing the barrier before constructing the basement can not meet the requirements of environmental protection, energy conservation, low carbon, construction period and the like. Under such circumstances, there is an urgent need to solve the problems of the development of the conditioned underground space in the existing two-story basement including the construction of engineering piles and fender piles.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a construction method of the existing two-layer basement engineering pile.
The aim of the invention can be achieved by the following technical scheme:
the construction method of the existing two-layer basement engineering pile is used for the obstacle-removing construction of the existing basement structure and the original building envelope, the existing basement structure is arranged in the original building envelope, the existing basement structure comprises a first layer of underground and a second layer of underground, the original engineering pile is arranged at the bottom of the second layer of underground, and the construction method comprises the following steps:
s1: constructing a newly built basement foundation pit support structure outside the original support structure, and reinforcing a top plate of the existing basement structure;
s2: a full-sleeve full-rotary drilling machine is adopted to open holes on a top plate of an existing basement structure and penetrate through the top plate, a floor slab and a bottom plate, and a plurality of upright piles and a plurality of engineering piles are constructed;
s3: removing a top plate, an inner wall, an outer wall and an original enclosure structure above a first floor of the underground floor of the existing basement structure, and constructing a first support on the second floor of the underground floor;
s4: dismantling a floor slab, an inner wall, an outer wall and an original enclosure structure above the underground two-layer bottom plate, and perforating and constructing a plurality of engineering piles on the underground two-layer bottom plate;
s5: and constructing a second support on the bottom plate of the underground two layers, removing the bottom plate of the underground two layers, chiseling the original building envelope and the original engineering pile from top to bottom to a preset third support elevation, and constructing a third support at the third support elevation to finish construction.
Preferably, the original enclosure structure is a plate-type support structure.
Preferably, the upright pile and the engineering pile are bored piles.
Preferably, in the step S4, a plurality of engineering piles are constructed by drilling holes through a water mill drilling machine.
Preferably, the newly-built basement foundation pit support structure comprises waterproof curtain stirring piles, underground continuous walls and crown beams.
Preferably, the first support, the second support and the third support are reinforced concrete supports.
Preferably, in the step S1, a bent formwork is erected in the underground layer of the underground structure to reinforce the top plate.
Preferably, in the construction of the upright post pile and the engineering pile, if the site has pressure-bearing water and the water head is higher than the elevation of the existing bottom plate, the curtain water insulation or decompression precipitation is adopted to carry out the pile foundation construction of the structural column.
Compared with the technology, the invention has the following advantages:
1. the invention fully utilizes the new and old basement enclosing structures and the basement outer walls, solves the problem that the existing two-layer basement cannot be wholly cleared under the complex condition, and realizes the construction technology of combining the clearing of the existing basement with the construction of engineering piles and upright posts.
2. According to the invention, during the obstacle clearance period, the first horizontal support is preferentially arranged to reduce the obstacle clearance excavation deformation, so that the influence of the old basement obstacle clearance construction on the surrounding environment is effectively controlled;
3. according to the invention, the construction of the engineering piles and the column piles is carried out on the bottom plate of the old basement, so that the construction of a new basement by secondary excavation of the foundation pit after backfilling of the obstacle clearing foundation pit and pile foundation enclosure construction is avoided, and the construction period and the earthwork cost are saved.
4. The two-stage treatment method combining the obstacle clearance and the engineering pile construction can realize the synchronous implementation of the whole obstacle clearance of the two-layer basement, the engineering pile construction of the newly built underground space and the foundation pit excavation, solves the problem of the construction of the two-layer basement for dismantling and reconstructing the engineering pile foundation under the complex environment condition, and accelerates the updating construction period of the old building underground space city.
Drawings
FIG. 1 is a schematic view of the construction of a post pile and an engineered pile on an existing basement roof in the present invention.
FIG. 2 is a schematic view of a first horizontal support for a construction of a bent over an existing basement floor.
FIG. 3 is a schematic view of a construction pile according to the present invention on a floor of an existing basement.
FIG. 4 is a schematic view of a second support constructed on an existing basement floor in accordance with the present invention.
FIG. 5 is a schematic illustration of a third support in the new basement foundation pit enclosure of the present invention.
The building structure comprises a basement structure 1, an original building envelope structure 2, a top plate 3, a column pile 4, a bent frame formwork 6, a first support 7, a bottom plate 8, engineering piles 9, a second support 10 and a third support.
Detailed Description
The invention will now be described in detail with reference to the drawings and specific examples. Note that the following description of the embodiments is merely an example, and the present invention is not intended to be limited to the applications and uses thereof, and is not intended to be limited to the following embodiments.
Examples
The construction method of the existing two-layer basement engineering pile is used for barrier removal construction of the existing basement structure 1 and the original building enclosure 2, the existing basement structure 1 is arranged in the original building enclosure 2, the existing basement structure 1 comprises a first layer of underground and a second layer of underground, and the original engineering pile is arranged at the bottom of the second layer of underground.
In the embodiment, a building with two layers underground is taken as an example, a raft pile foundation is adopted in the existing building, the thickness of the raft pile is 1400-1800 mm, the engineering pile 8 is a drilling filling pile with phi 600mm, and the pile length is 36m. The existing building basement foundation pit guard pile adopts a raft plate phi 850@950 bored pile, the pile length is 18.2m, the outer side of the guard pile adopts two rows of double-shaft cement-soil mixing piles for lap joint water stop, and the pile length is 17m. The existing building is dismantled and rebuilt, and the underground space of the newly built building is an underground three-layer garage. After the ground structure of the existing building is removed, the method is adopted to remove the obstacle and construct simultaneously. The construction method comprises the following steps:
s1: as shown in fig. 1, constructing a newly built basement foundation pit support structure outside an original support structure 2, reinforcing a top plate 3 of an existing basement structure 1, and sequentially constructing a waterproof curtain stirring pile, an underground continuous wall and a crown beam; and a bent formwork 5 is erected in the existing basement to reinforce the top plate 3.
S2: as shown in fig. 2, a full-sleeve full-rotary drilling machine is adopted to accurately open holes on a top plate 3 of an existing basement structure 1 to penetrate through the top plate 3, a floor slab and a bottom plate 7 of the existing basement structure 1, and a construction pile 8 which cannot be constructed on a construction pile 4 and an old basement bottom plate 7 is constructed;
s3: gradually chiseling the top plate 3, the inner wall, the outer wall and the old building envelope of the existing basement structure 1 to the top of the underground one-layer floor slab; and (3) constructing a first channel horizontal support of the newly-built basement support structure, firstly erecting a bent on the floor slab of the existing basement structure 1 in the construction process, and then constructing the first channel horizontal support of the newly-built basement support structure.
S4: as shown in fig. 3, the floor slab, the inner wall, the outer wall and the original enclosure structure 2 above the two-layer underground bottom plate 7 are removed, the clearance between the first support 6 and the existing basement bottom plate 7 is combined, the height of a bored pile construction pile frame is customized, and the hoisting single-section length of a reinforcement cage is reasonably determined; and the residual engineering piles 8 are constructed by accurately perforating on the existing basement bottom plate 7 by adopting a water mill drilling machine. If the site has pressure-bearing water and the water head is higher than the elevation of the existing bottom plate 7, adopting pressure-bearing water control measures such as curtain water isolation, decompression and precipitation to ensure the safety of pile foundation construction and surrounding environment;
s5: as shown in fig. 4, a second support 9 is constructed on the bottom plate 7 of the underground two layers, the bottom plate 7 of the underground two layers is removed, the original enclosure structure 2 and the original engineering pile are chiseled from top to bottom to reach a preset third support elevation, and a third support 10 is constructed at the third support elevation to finish the construction.
S6: as shown in fig. 5, the construction is carried out in the subsequent conventional foundation pit.
In steps S2 and S4 of this embodiment, the post pile 4 and part of the engineering pile 8 are constructed on the existing basement roof 3 by using a full sleeve full rotary drill, and the engineering pile 8 is mainly the engineering pile 8 which is difficult to construct on the existing basement floor 7. The above embodiments are merely examples, and do not limit the scope of the present invention. These embodiments may be implemented in various other ways, and various omissions, substitutions, and changes may be made without departing from the scope of the technical idea of the present invention.
Claims (8)
1. The construction method of the existing two-layer basement engineering pile is characterized by being used for barrier removal construction of an existing basement structure (1) and an original building enclosure (2), wherein the existing basement structure (1) is arranged in the original building enclosure (2), the existing basement structure (1) comprises a first layer and a second layer, the bottom of the second layer is provided with the original engineering pile, and the construction method comprises the following steps:
s1: constructing a newly built basement foundation pit support structure outside the original support structure (2), and reinforcing a top plate (3) of the existing basement structure (1);
s2: a full-sleeve full-rotary drilling machine is adopted to open holes on a top plate (3) of the existing basement structure (1) and penetrate through the top plate (3), a floor slab and a bottom plate (7) of the existing basement structure (1), and a plurality of upright piles (4) and a plurality of engineering piles (8) are constructed;
s3: removing a top plate (3), an inner wall, an outer wall and an original enclosure structure (2) above a first floor of the underground floor of the existing basement structure (1), and constructing a first support (6) on the second floor of the underground floor;
s4: removing the floor slab, the inner wall, the outer wall and the original enclosure structure (2) above the underground two-layer bottom plate (7), and perforating and constructing a plurality of engineering piles (8) on the underground two-layer bottom plate (7);
s5: and constructing a second support (9) on the bottom plate (7) of the underground two layers, dismantling the bottom plate (7) of the underground two layers, chiseling the original building envelope (2) and the original engineering pile from top to bottom to a preset third support elevation, and constructing a third support (10) at the third support elevation to finish construction.
2. The construction method of the existing two-layer basement engineering pile according to claim 1, wherein the original enclosure structure (2) is a plate-type supporting structure.
3. The construction method of the existing two-layer basement engineering pile according to claim 1, wherein the upright pile (4) and the engineering pile (8) are bored piles.
4. The construction method of the existing two-layer basement engineering pile according to claim 1, wherein in the step S4, a plurality of engineering piles (8) are constructed by drilling holes through a water mill drilling machine.
5. The construction method of the existing two-layer basement engineering pile according to claim 1, wherein the newly-built basement foundation pit enclosure structure comprises a waterproof curtain stirring pile, a diaphragm wall and a crown beam.
6. The construction method of the existing two-layer basement engineering pile according to claim 1, wherein the first support (6), the second support (9) and the third support (10) are reinforced concrete supports.
7. The construction method of the existing two-layer basement engineering pile according to claim 1, wherein in the step S1, a bent formwork (5) is erected in a layer of the underground structure to reinforce the top plate (3).
8. The construction method of the existing two-layer basement engineering pile according to claim 1, wherein in the construction of the upright pile (4) and the engineering pile (8), if the site has pressure-bearing water and the water head is higher than the elevation of the existing bottom plate (7), curtain water isolation or decompression precipitation is adopted for pile foundation construction of the structural column.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210686885.XA CN117287056A (en) | 2022-06-16 | 2022-06-16 | Construction method of existing two-layer basement engineering pile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210686885.XA CN117287056A (en) | 2022-06-16 | 2022-06-16 | Construction method of existing two-layer basement engineering pile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117287056A true CN117287056A (en) | 2023-12-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210686885.XA Pending CN117287056A (en) | 2022-06-16 | 2022-06-16 | Construction method of existing two-layer basement engineering pile |
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| Country | Link |
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| CN (1) | CN117287056A (en) |
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2022
- 2022-06-16 CN CN202210686885.XA patent/CN117287056A/en active Pending
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