CN114086568A - Foundation pit support structure and construction method thereof - Google Patents
Foundation pit support structure and construction method thereof Download PDFInfo
- Publication number
- CN114086568A CN114086568A CN202111591403.4A CN202111591403A CN114086568A CN 114086568 A CN114086568 A CN 114086568A CN 202111591403 A CN202111591403 A CN 202111591403A CN 114086568 A CN114086568 A CN 114086568A
- Authority
- CN
- China
- Prior art keywords
- pile
- steel sheet
- steel
- piles
- foundation pit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000010276 construction Methods 0.000 title claims description 18
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 313
- 239000010959 steel Substances 0.000 claims abstract description 313
- 239000002689 soil Substances 0.000 claims abstract description 19
- 238000000034 method Methods 0.000 claims abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 8
- 230000000903 blocking effect Effects 0.000 claims description 11
- 238000011084 recovery Methods 0.000 claims description 3
- 239000002002 slurry Substances 0.000 claims description 3
- 230000006978 adaptation Effects 0.000 claims 1
- 230000009977 dual effect Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- 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
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/06—Restraining of underground water
- E02D19/12—Restraining of underground water by damming or interrupting the passage of underground water
- E02D19/18—Restraining of underground water by damming or interrupting the passage of underground water by making use of sealing aprons, e.g. diaphragms made from bituminous or clay material
-
- 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
- E02D5/02—Sheet piles or sheet pile bulkheads
- E02D5/03—Prefabricated parts, e.g. composite sheet piles
- E02D5/04—Prefabricated parts, e.g. composite sheet piles made of steel
-
- 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
- E02D5/02—Sheet piles or sheet pile bulkheads
- E02D5/03—Prefabricated parts, e.g. composite sheet piles
- E02D5/04—Prefabricated parts, e.g. composite sheet piles made of steel
- E02D5/08—Locking forms; Edge joints; Pile crossings; Branch pieces
-
- 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
- E02D5/24—Prefabricated piles
- E02D5/28—Prefabricated piles made of steel or other metals
-
- 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
- E02D5/24—Prefabricated piles
- E02D5/28—Prefabricated piles made of steel or other metals
- E02D5/285—Prefabricated piles made of steel or other metals tubular, e.g. prefabricated from sheet pile elements
Landscapes
- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- Paleontology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Environmental & Geological Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Bulkheads Adapted To Foundation Construction (AREA)
Abstract
The invention discloses a foundation pit enclosure structure which is composed of a plurality of steel sheet piles, steel pipe piles, cross beams and I-shaped steel piles; the two steel sheet piles are mutually meshed and connected through the meshed structures arranged on the two steel sheet piles to form a continuous enclosure structure, and the continuous enclosure structure has the dual functions of water stopping and soil retaining; the cross section of the steel sheet pile along the length direction is Z-shaped, the I-shaped steel pile is connected to the inner side of one corner of the steel sheet pile, and a triangular structure is formed between the I-shaped steel pile and the two connected steel sheet piles; a plurality of steel pipe piles are connected to the I-shaped steel piles at intervals; the steel sheet piles positioned between two adjacent steel pipe piles are connected through a plurality of groups of cross beams; the structure and the method are flexible and various; the support device can be flexibly selected and set according to the field conditions in actual engineering, has a simple structure, is convenient to construct, is easy to implement and high in safety, and provides a brand-new idea for eliminating the support mode of the inner support of the deep foundation pit or the ultra-deep foundation pit.
Description
Technical Field
The invention relates to the technical field of civil engineering, in particular to a foundation pit support structure and a construction method thereof.
Background
The foundation pit is a space below the ground excavated for constructing a foundation and a basement of a building (including a structure), belongs to temporary engineering, and is used for providing a space so that the construction operation of the foundation can be performed according to a position specified by design.
The foundation pit enclosure is a method for developing and utilizing underground space and constructing various underground buildings such as multi-layer basements, underground railways, underground commercial streets and the like: there are gravity type mixing pile retaining wall, underground continuous wall, pile row retaining wall, etc.
The stability of a foundation pit and the safety and convenience of operation in the pit are ensured, and the displacement of soil at the bottom of the pit and outside the pit is controlled within a certain range, so that the normal use of adjacent buildings and municipal facilities is ensured; the existing foundation pit support is supported and reinforced by adopting a reinforced concrete structure, but the construction period of the technology is longer, so that the speed of the whole civil construction is reduced.
Disclosure of Invention
In the prior art, the invention aims to provide an envelope structure which is convenient to install and reasonable in structure.
In order to achieve the purpose, the invention provides the following technical scheme:
a foundation pit enclosure structure is composed of a plurality of steel sheet piles, steel pipe piles, cross beams and I-shaped steel piles;
the two steel sheet piles are mutually meshed and connected through the arranged meshing structures to form a continuous enclosure structure, and the enclosure structure has the dual functions of water stopping and soil retaining; the cross section of the steel sheet pile along the length direction is Z-shaped, the I-shaped steel pile is connected to the inner side of one corner of the steel sheet pile, and a triangular structure is formed between the I-shaped steel pile and the two connected steel sheet piles; the steel pipe piles are connected to the non-blocking side of the enclosure structure and are connected to the I-shaped steel piles at intervals; and the steel sheet piles between the two adjacent steel pipe piles are connected through a plurality of groups of beams, and two ends of each beam are respectively welded on the two steel pipe piles.
Furthermore, one side of each steel sheet pile is provided with a first clamping groove used for being connected with the adjacent steel sheet pile, and the other side of each steel sheet pile is provided with a clamping strip matched with the first clamping groove.
Furthermore, the cross section of the first clamping groove along the length direction is fan-shaped, and the cross section of the clamping strip along the length direction is circular.
Furthermore, the inner side of the turning of the steel sheet pile is provided with a first limiting strip and a second limiting strip which are used for clamping the I-shaped steel pile, and the first limiting strip and the second limiting strip are respectively clamped on two end faces of a flange plate on one side of the I-shaped steel pile.
Furthermore, a second clamping groove for clamping the I-shaped steel pile is formed in the outer side of the corner of the steel sheet pile, and the second clamping groove is formed by a third limiting strip arranged on the outer side of the corner of the steel sheet pile; and two sides of the flange plate on the other side of the I-shaped steel pile are respectively clamped in a second clamping groove formed in the steel sheet pile and a second clamping groove formed in the adjacent steel sheet pile.
Furthermore, a connecting strip used for being connected with the I-shaped steel pile is arranged on the side face of the steel pipe pile, and a connecting groove matched with the connecting strip is arranged on one side, close to the steel pipe pile, of the I-shaped steel pile.
Furthermore, the multiple groups of beams are used for connecting the steel sheet piles arranged between two adjacent steel pipe piles through fasteners, and the beams are arranged between the two steel sheet piles at equal intervals.
In addition, the invention provides a construction method of the foundation pit support structure, which comprises the following steps:
s1, implanting steel sheet piles; in a soft soil stratum, sequentially inserting steel sheet piles into the soft soil stratum directly along a boundary line of a foundation pit enclosure; the clamping strip arranged on the steel sheet pile is inserted into the first clamping groove arranged on the adjacent steel sheet pile.
S2, inserting an I-shaped steel pile into the inner side of the corner of the steel sheet pile; inserting a flange plate at one side of the I-shaped steel pile into the embedded groove of the steel sheet pile, and respectively clamping the flange plate at the other side of the I-shaped steel pile in a second clamping groove of the steel sheet pile and a second clamping groove of the adjacent steel sheet pile; a triangular structure is formed between the I-shaped steel pile and the two connected steel sheet piles; the I-shaped steel piles and the steel sheet piles are combined into a whole, so that a continuous enclosure structure is formed.
S3, inserting the steel pipe pile into the non-blocking side of the enclosure structure; the steel pipe piles are inserted at intervals on the non-blocking side of the enclosure structure and connected to the I-shaped steel piles; the steel pipe pile and the enclosure structure are combined into a whole.
S4, mounting a cross beam; installing a cross beam on a steel sheet pile arranged between two adjacent steel pipe piles, and respectively welding two ends of the cross beam on the two adjacent steel pipe piles; the steel sheet piles are connected with the cross beams through screw piles, and the steel sheet piles arranged among the steel pipe piles are further combined into a continuous whole through the cross beams.
S5, pulling out and recovering the enclosure structure; removing a connecting fastener of a beam, biting the upper end of the steel pipe pile by using a vibration hammer clamp after the foundation pit is backfilled, separating the steel pipe pile from the surrounding soil body by vibration, pulling the steel pipe pile out of the stratum by using a crane, and pulling the I-shaped steel pile and the steel plate pile out of the stratum by using the same method to realize the full recovery of the enclosure structure; the filling slurry can be injected into the gap of the steel sheet pile to control the deformation.
Furthermore, the lengths of the steel pipe piles, the I-shaped steel piles and the steel sheet piles inserted into the stratum are the same; and the steel pipe pile, the I-shaped steel pile and the steel plate pile are inserted into the soft soil stratum through a vibration hammer or a hydraulic impact hammer.
Furthermore, the connection angle between the two steel sheet piles is adjusted according to the boundary line of the foundation pit enclosure, so that a continuous enclosure structure with radian or flatness is formed.
Compared with the prior art, the invention has the beneficial effects that:
according to the technical scheme, the two steel sheet piles are connected through the occlusion structure, the I-shaped steel pile is connected with the two connected steel sheet piles to form a triangular structure, so that the enclosure structure is formed, has both soil retaining and water stopping functions, and can replace the existing row pile and water stopping curtain type enclosure structure; meanwhile, the steel pipe piles are connected to the I-shaped steel piles at intervals to play a supporting role; the steel sheet piles positioned between two adjacent steel pipe piles are connected through a plurality of groups of cross beams, and two ends of each cross beam are welded on the two steel pipe piles respectively; the integrity of the whole enclosure structure is enhanced, meanwhile, the support is prevented from being arranged in the foundation pit, no influence is caused on the construction of the upper structure, and the integral construction speed of the building is accelerated.
The structure and the method are flexible and various, and the enclosure structure can enclose a simple and firm enclosure wall for building a multi-layer basement, an underground railway and an underground commercial street; the support device can be flexibly selected and set according to the field conditions in actual engineering, has a simple structure, is convenient to construct, is easy to implement and high in safety, and provides a brand-new idea for eliminating the support mode of the inner support of the deep foundation pit or the ultra-deep foundation pit.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic view of a combined structure of a steel sheet pile, a steel pipe pile and an i-shaped steel pile according to the present invention.
Fig. 2 is a schematic view of a combined structure of the steel sheet pile and the i-shaped steel pile of the present invention.
Fig. 3 is a schematic three-dimensional structure diagram of a building envelope according to an embodiment of the invention.
Fig. 4 is a schematic top view of a building envelope according to an embodiment of the present invention.
Fig. 5 is a schematic three-dimensional structure diagram of a second enclosure according to an embodiment of the invention.
Fig. 6 is a schematic top view of a second enclosure according to an embodiment of the present invention.
Fig. 7 is a schematic three-dimensional structure diagram of a three-enclosure structure according to an embodiment of the present invention.
Fig. 8 is a schematic top view of a three-enclosure structure according to an embodiment of the invention.
Fig. 9 is a schematic view of a right angle turn structure of the enclosure of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to one of fig. 1-9, the present invention provides a technical solution:
a foundation pit enclosure structure is composed of a plurality of steel sheet piles 1, steel pipe piles 2, cross beams 4 and I-shaped steel piles 3;
as shown in fig. 1-2, two steel sheet piles 1 are connected with each other in an occlusion manner through an occlusion structure arranged on the steel sheet piles to form a continuous enclosure structure, and the continuous enclosure structure has dual functions of water stopping and soil retaining; the cross section of the steel sheet pile 1 along the length direction is Z-shaped, the I-shaped steel pile 3 is connected to the inner side of one corner 17 of the steel sheet pile 1, and a triangular structure is formed between the I-shaped steel pile 3 and the two connected steel sheet piles 1; the steel pipe piles 2 are connected to the non-blocking side of the building enclosure, and the steel pipe piles 2 are connected to the I-shaped steel piles 3 at intervals; the steel sheet piles 1 between the two adjacent steel pipe piles 2 are connected through a plurality of groups of cross beams 4, and two ends of each cross beam 4 are welded on the two steel pipe piles 2 respectively.
Furthermore, the two steel sheet piles 1 are connected in an occlusion mode through an occlusion structure, and the I-shaped steel pile 3 is clamped on the inner side of one corner 17 of each steel sheet pile 1; therefore, the I-shaped steel pile 3 is connected with the two connected steel sheet piles 1 to form a triangular structure, and the steel sheet piles 1 are connected into a whole to form a continuous foundation pit enclosure structure; in the foundation pit, the steel sheet pile 1 is connected with the I-shaped steel pile 3 to form a stable triangular structure, so that the rigidity of the enclosure structure formed by the steel sheet pile 1 is greatly improved, and the deformation in the middle of the steel sheet pile 1 is effectively controlled.
Meanwhile, the steel pipe piles 2 are connected to the I-shaped steel piles 3 at intervals to play a supporting role; the steel sheet piles 1 positioned between the two adjacent steel pipe piles 2 are connected through a plurality of groups of cross beams 4, and two ends of each cross beam 4 are respectively welded on the two steel pipe piles 2; the integrity of the whole enclosure structure is enhanced, meanwhile, the support is prevented from being arranged in the foundation pit, no influence is caused on the construction of the upper structure, and the integral construction speed of the building is accelerated.
Further, one side of each steel sheet pile 1 is provided with a first clamping groove 11 used for being connected with the adjacent steel sheet pile 1, and the other side of each steel sheet pile 1 is provided with a clamping strip 12 matched with the first clamping groove 11; first joint groove 11 is fan-shaped along its length direction's cross section, joint strip 12 is circular along its length direction's cross section.
Furthermore, the two steel sheet piles 1 are connected in a meshing manner through a meshing structure, have soil retaining and water stopping functions and can replace the existing row pile and water stopping curtain type enclosure structure.
The inner side of a corner 17 of the steel sheet pile 1 is provided with a first limiting strip 14 and a second limiting strip 16 which are used for clamping an I-shaped steel pile 3, and the first limiting strip 14 and the second limiting strip 16 are respectively clamped on two end faces of a flange plate on one side of the I-shaped steel pile 3; a second clamping groove 13 for clamping the I-shaped steel pile 3 is formed in the outer side of the corner 17 of the steel sheet pile 1, and the second clamping groove 13 is formed by a third limiting strip 15 arranged on the outer side of the corner 17 of the steel sheet pile 1; and two sides of the flange plate at the other side of the I-shaped steel pile 3 are respectively clamped in a second clamping groove 13 arranged in the steel sheet pile 1 and a second clamping groove 13 arranged in the adjacent steel sheet pile 1.
As shown in fig. 1-2, one flange plate of one side of the i-shaped steel pile 3 is inserted into a corner 17 of the steel sheet pile 1, and the other flange plate of the i-shaped steel pile 3 is inserted into the second clamping groove 13 of the steel sheet pile 1 and the second clamping groove 13 of the adjacent steel sheet pile 1;
further, the insertion process of the I-shaped steel pile 3 can be smoothly implanted into the ground along the second clamping groove 13 and the turning part 17, and meanwhile, the I-shaped steel pile 3 and the steel sheet pile 1 can be tightly buckled together and combined into a whole.
As shown in fig. 1-2, a connecting strip 21 for connecting with the i-shaped steel pile 3 is arranged on the side surface of the steel pipe pile 2, and a connecting groove 31 adapted to the connecting strip 21 is arranged on one side of the i-shaped steel pile 3 close to the steel pipe pile 2; the steel sheet piles 1 that multiunit the crossbeam 4 was used for setting up between two adjacent steel-pipe piles 2 through the fastener are connected, and crossbeam 4 equidistance sets up between two steel sheet piles 1.
Further, the steel pipe pile 2 can be smoothly implanted into the ground along the connecting groove 31 in the inserting process, and meanwhile, the I-shaped steel pile 3 and the steel pipe pile 2 can be tightly buckled together; meanwhile, the steel sheet piles 1 between the two steel pipe piles 2 are connected by the multiple groups of beams 4 through fasteners; the integrity of the whole enclosure structure is enhanced, the rigidity of the enclosure structure formed by the steel sheet piles 1 is greatly improved, and therefore the deformation of the middle of the steel sheet piles 1 is effectively controlled.
As shown in fig. 9, the two steel sheet piles 1 are engaged with each other through an engagement structure provided therein, and the connection angle between the steel sheet piles 1 is adjusted; the cross beam 4 connected between the steel sheet piles 1 is L-shaped, and two ends of the cross beam 4 are connected through connecting rods, so that a triangular structure is formed between the cross beam 4 and the connecting rods, and the right-angle turning of the enclosure structure is firmer; after the steel sheet piles 1 are connected, a rectangular enclosure structure can be formed by combining the steel sheet piles in the foundation pit, and therefore the application range of the enclosure structure is greatly expanded.
The first embodiment of the combination mode of the enclosure structure is as follows:
the two steel sheet piles 1 are mutually meshed and connected through the arranged meshing structures to form a continuous enclosure structure; the I-shaped steel pile 3 is clamped at the turning positions 17 at two sides of the steel sheet pile 1, and a triangular structure is formed between the I-shaped steel pile 3 and the two connected steel sheet piles 1; the steel pipe piles 2 are connected to the non-blocking side of the building enclosure, and the steel pipe piles 2 are connected to the I-shaped steel piles 3 at intervals; the steel sheet piles 1 between the two adjacent steel pipe piles 2 are connected through a plurality of groups of cross beams 4, and two ends of each cross beam 4 are welded on the two steel pipe piles 2 respectively.
The first embodiment can be applied to an enclosure structure formed by enclosing in a foundation pit with a deeper depth; the steel sheet pile 1 is connected with the I-shaped steel pile 3 to form a stable triangular structure, so that the rigidity of the enclosure structure formed by the steel sheet pile 1 is greatly improved, and the deformation in the middle of the steel sheet pile 1 is effectively controlled; simple structure, construction convenience, easy to implement, the security is high.
Wherein, the embodiment of the combination mode of the building envelope is two:
the two steel sheet piles 1 are mutually meshed and connected through the arranged meshing structures to form a continuous enclosure structure; the I-shaped steel pile 3 is clamped at a corner 17 on the same side of the steel sheet pile 1, and a triangular structure is formed between the I-shaped steel pile 3 and the two connected steel sheet piles 1; wherein, the turning 17 at the other side of the steel sheet pile 1 is not clamped with an I-shaped steel pile 3; the steel pipe piles 2 are connected to the non-blocking side of the building enclosure, and the steel pipe piles 2 are connected to the I-shaped steel piles 3 at intervals; the steel sheet piles 1 between the two adjacent steel pipe piles 2 are connected through a plurality of groups of cross beams 4, and two ends of each cross beam 4 are welded on the two steel pipe piles 2 respectively.
The first embodiment can be applied to an enclosure structure formed by enclosing in a foundation pit with a deeper depth; the steel sheet pile 1 is connected with the I-shaped steel pile 3 to form a stable triangular structure, so that the rigidity of the enclosure structure formed by the steel sheet pile 1 is greatly improved, and the deformation in the middle of the steel sheet pile 1 is effectively controlled; simple structure, construction convenience, easy to implement, the security is high.
Wherein, the third embodiment of the combination mode of envelope:
the two steel sheet piles 1 are mutually meshed and connected through the arranged meshing structures to form a continuous enclosure structure.
The third embodiment can be applied to an enclosure structure formed by enclosing in a foundation pit with a shallow depth; simple structure, construction convenience, easy to implement, the security is high.
In addition, as shown in fig. 1 to 4, the present invention provides a construction method of the above-mentioned foundation pit support structure, including the following steps:
s1, implanting the steel sheet pile 1; in a soft soil stratum, sequentially inserting the steel sheet piles 1 into the soft soil stratum directly along the boundary line of the foundation pit enclosure; the clamping bar 12 arranged on the steel sheet pile 1 is inserted into the first clamping groove 11 arranged on the adjacent steel sheet pile 1.
S2, inserting the I-shaped steel pile 3 into the inner side of the corner 17 of the steel sheet pile 1; inserting a flange plate at one side of the I-shaped steel pile 3 into the embedded groove 17 of the steel sheet pile 1, and respectively clamping the flange plate at the other side of the I-shaped steel pile 3 in the second clamping groove 13 of the steel sheet pile 1 and the second clamping groove 13 of the adjacent steel sheet pile 1; a triangular structure is formed between the I-shaped steel pile 3 and the two connected steel sheet piles 1; the I-shaped steel pile 3 and the steel sheet pile 1 are combined into a whole, so that a continuous enclosure structure is formed.
S3, inserting the steel pipe pile 2 into the non-blocking side of the enclosure structure; the steel pipe piles 2 are inserted into the non-blocking side of the building enclosure at intervals, and the steel pipe piles 2 are connected to the I-shaped steel piles 3; the steel pipe pile 2 and the enclosure structure are combined into a whole.
S4, mounting the cross beam 4; a cross beam 4 is arranged on the steel sheet pile 1 arranged between two adjacent steel pipe piles 2, and two ends of the cross beam 4 are respectively welded on the two adjacent steel pipe piles 2; the steel sheet piles 1 are connected with the cross beams 4 through screw piles, and the steel sheet piles 1 arranged between the steel pipe piles 2 are further combined into a continuous whole through the cross beams 4.
S5, pulling out and recovering the enclosure structure; firstly, removing a connecting fastener of a beam 4, biting the upper end of a steel pipe pile 2 by using a vibration hammer clamp after a foundation pit is backfilled, separating the steel pipe pile 2 from the surrounding soil body by vibration, pulling the steel pipe pile 2 out of the stratum by using a crane, and then pulling an I-shaped steel pile 3 and a steel plate pile 1 out of the stratum by using the same method to realize the full recovery of the enclosure structure; filling slurry can be injected into the gap of the steel sheet pile 1 to control deformation.
The lengths of the steel pipe piles 2, the I-shaped steel piles 3 and the steel sheet piles 1 inserted into the ground are the same; the steel pipe pile 2, the I-shaped steel pile 3 and the steel plate pile 1 are inserted into a soft soil stratum through a vibration hammer or a hydraulic impact hammer; the connecting angle between the two steel sheet piles 1 is adjusted according to the boundary line of the foundation pit enclosure, and a continuous and radian or straight enclosure structure is formed.
The structure and the method are flexible and various, and the enclosure structure can enclose a simple and firm enclosure wall for building a multi-layer basement, an underground railway and an underground commercial street; the support device can be flexibly selected and set according to the field conditions in actual engineering, has a simple structure, is convenient to construct, is easy to implement and high in safety, and provides a brand-new idea for eliminating the support mode of the inner support of the deep foundation pit or the ultra-deep foundation pit.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise forms disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (10)
1. A foundation pit support structure is characterized in that: the enclosure structure is composed of a plurality of steel sheet piles (1), steel pipe piles (2), cross beams (4) and I-shaped steel piles (3); the two steel sheet piles (1) are mutually meshed and connected through the arranged meshing structures to form a continuous enclosure structure, and the continuous enclosure structure has double functions of water stopping and soil retaining; the cross section of the steel sheet pile (1) along the length direction is Z-shaped, the I-shaped steel pile (3) is connected to the inner side of one corner (17) of the steel sheet pile (1), and a triangular structure is formed between the I-shaped steel pile (3) and the two connected steel sheet piles (1); the steel pipe piles (2) are connected to the non-blocking side of the building enclosure, and the steel pipe piles (2) are connected to the I-shaped steel piles (3) at intervals; the steel sheet piles (1) between the two adjacent steel pipe piles (2) are connected through a plurality of groups of cross beams (4), and two ends of each cross beam (4) are welded on the two steel pipe piles (2) respectively.
2. A foundation pit enclosure according to claim 1 wherein: one side of steel sheet pile (1) is equipped with and is used for the first joint groove (11) that link to each other with adjacent steel sheet pile (1), the opposite side of steel sheet pile (1) is equipped with joint strip (12) with first joint groove (11) looks adaptation.
3. A foundation pit enclosure according to claim 2 wherein: first joint groove (11) are fan-shaped along its length direction's cross section, joint strip (12) are circular along its length direction's cross section.
4. A foundation pit enclosure according to claim 1 wherein: the steel sheet pile is characterized in that a first limiting strip (14) and a second limiting strip (16) which are used for clamping an I-shaped steel pile (3) are arranged on the inner side of a turning part (17) of the steel sheet pile (1), and the first limiting strip (14) and the second limiting strip (16) are respectively clamped on two end faces of a flange plate on one side of the I-shaped steel pile (3).
5. A foundation pit enclosure structure according to claim 4, wherein: a second clamping groove (13) for clamping the I-shaped steel pile (3) is formed in the outer side of the turning part (17) of the steel sheet pile (1), and the second clamping groove (13) is formed by a third limiting strip (15) arranged on the outer side of the turning part (17) of the steel sheet pile (1); and two sides of the flange plate on the other side of the I-shaped steel pile (3) are respectively clamped in a second clamping groove (13) formed in the steel sheet pile (1) and a second clamping groove (13) formed in the adjacent steel sheet pile (1).
6. A foundation pit enclosure according to claim 1 wherein: the connecting strip (21) used for being connected with the I-shaped steel pile (3) is arranged on the side face of the steel pipe pile (2), and a connecting groove (31) matched with the connecting strip (21) is formed in one side, close to the steel pipe pile (2), of the I-shaped steel pile (3).
7. A foundation pit enclosure according to claim 1 wherein: the steel sheet piles (1) that multiunit crossbeam (4) were used for setting between two adjacent steel-pipe piles (2) through the fastener connect, and crossbeam (4) equidistance sets up between two steel sheet piles (1).
8. A construction method of a foundation pit support structure is characterized by comprising the following steps: the method comprises the following steps:
s1, implanting a steel sheet pile (1); in a soft soil stratum, sequentially inserting steel sheet piles (1) into the soft soil stratum directly along a boundary line of a foundation pit enclosure; clamping strips (12) arranged on the steel sheet piles (1) are inserted into first clamping grooves (11) arranged on the adjacent steel sheet piles (1).
S2, inserting an I-shaped steel pile (3) into the inner side of a corner (17) of the steel sheet pile (1); inserting a flange plate at one side of the I-shaped steel pile (3) into an embedded groove (17) of the steel sheet pile (1), and respectively clamping the flange plate at the other side of the I-shaped steel pile (3) in a second clamping groove (13) of the steel sheet pile (1) and a second clamping groove (13) of an adjacent steel sheet pile (1); a triangular structure is formed between the I-shaped steel pile (3) and the two connected steel sheet piles (1); the I-shaped steel pile (3) and the steel sheet pile (1) are combined into a whole, so that a continuous enclosure structure is formed.
S3, inserting the steel pipe pile (2) into the non-blocking side of the enclosure structure; the steel pipe piles (2) are inserted into the non-blocking side of the building enclosure at intervals, and the steel pipe piles (2) are connected to the I-shaped steel piles (3); the steel pipe pile (2) and the enclosure structure are combined into a whole.
S4, mounting a cross beam (4); a cross beam (4) is arranged on the steel sheet pile (1) arranged between two adjacent steel pipe piles (2), and two ends of the cross beam (4) are respectively welded on the two adjacent steel pipe piles (2); the steel sheet piles (1) are connected with the cross beams (4) through screw piles, and the cross beams (4) further combine the steel sheet piles (1) arranged between the steel pipe piles (2) into a continuous whole.
S5, pulling out and recovering the enclosure structure; firstly, removing a connecting fastener of a beam (4), biting the upper end of a steel pipe pile (2) by using a vibration hammer clamp after a foundation pit is backfilled, separating the steel pipe pile (2) from a surrounding soil body by vibration, pulling the steel pipe pile (2) out of the stratum by using a crane, and then pulling an I-shaped steel pile (3) and a steel plate pile (1) out of the stratum by using the same method to realize the full recovery of a building enclosure; the filling slurry can be injected into the gap of the steel sheet pile (1) to control the deformation.
9. The construction method of the foundation pit enclosure structure according to claim 8, wherein: the lengths of the steel pipe piles (2), the H-shaped steel piles (3) and the steel plate piles (1) inserted into the stratum are the same; and the steel pipe pile (2), the I-shaped steel pile (3) and the steel plate pile (1) are inserted into a soft soil stratum through a vibration hammer or a hydraulic impact hammer.
10. The construction method of the foundation pit enclosure structure according to claim 8, wherein: the connecting angle between the two steel sheet piles (1) is adjusted according to the boundary line of the foundation pit enclosure, and a continuous and radian or straight enclosure structure is formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111591403.4A CN114086568A (en) | 2021-12-23 | 2021-12-23 | Foundation pit support structure and construction method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111591403.4A CN114086568A (en) | 2021-12-23 | 2021-12-23 | Foundation pit support structure and construction method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114086568A true CN114086568A (en) | 2022-02-25 |
Family
ID=80307793
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111591403.4A Pending CN114086568A (en) | 2021-12-23 | 2021-12-23 | Foundation pit support structure and construction method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114086568A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115305919A (en) * | 2022-07-06 | 2022-11-08 | 中煤浙江基础建设有限公司 | Foundation pit excavation earthwork landslide prevention enclosure structure and construction method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102140794A (en) * | 2010-02-02 | 2011-08-03 | 中交二公局第五工程有限公司 | Design method for section steel latch steel pipe pile enclosure structure |
| CN103290848A (en) * | 2013-06-20 | 2013-09-11 | 江苏城市职业学院 | Large diameter arc-shaped steel sheet pile combined foundation pit retaining structure and construction method thereof |
| JP2018127834A (en) * | 2017-02-09 | 2018-08-16 | 新日鐵住金株式会社 | Foundation reinforcing structure, reinforced foundation structure, and method for reinforcing foundation |
| CN109797755A (en) * | 2019-03-20 | 2019-05-24 | 安徽省第二建筑工程有限公司 | The steel pipe Larsen steel sheet pile enclosure structure and its construction method of Elements of Space Grid Truss support |
| CN109972627A (en) * | 2019-03-09 | 2019-07-05 | 王琪 | A kind of fashioned iron assembled foundation pit enclosure structure and its construction method |
| CN210315571U (en) * | 2019-04-10 | 2020-04-14 | 南京弘正建设发展有限公司 | Deep foundation pit supporting structure |
-
2021
- 2021-12-23 CN CN202111591403.4A patent/CN114086568A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102140794A (en) * | 2010-02-02 | 2011-08-03 | 中交二公局第五工程有限公司 | Design method for section steel latch steel pipe pile enclosure structure |
| CN103290848A (en) * | 2013-06-20 | 2013-09-11 | 江苏城市职业学院 | Large diameter arc-shaped steel sheet pile combined foundation pit retaining structure and construction method thereof |
| JP2018127834A (en) * | 2017-02-09 | 2018-08-16 | 新日鐵住金株式会社 | Foundation reinforcing structure, reinforced foundation structure, and method for reinforcing foundation |
| CN109972627A (en) * | 2019-03-09 | 2019-07-05 | 王琪 | A kind of fashioned iron assembled foundation pit enclosure structure and its construction method |
| CN109797755A (en) * | 2019-03-20 | 2019-05-24 | 安徽省第二建筑工程有限公司 | The steel pipe Larsen steel sheet pile enclosure structure and its construction method of Elements of Space Grid Truss support |
| CN210315571U (en) * | 2019-04-10 | 2020-04-14 | 南京弘正建设发展有限公司 | Deep foundation pit supporting structure |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115305919A (en) * | 2022-07-06 | 2022-11-08 | 中煤浙江基础建设有限公司 | Foundation pit excavation earthwork landslide prevention enclosure structure and construction method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN213063583U (en) | Underground pipe curtain combined type prestressed structure adopting linear prestressed cable | |
| KR100915099B1 (en) | Structure for supporting retaining wall of earth with arch material and method constructing the arch structure | |
| JP2018184829A (en) | Retaining wall | |
| US20060179730A1 (en) | Wall structural member and method for constructing a wall structure | |
| CN114086568A (en) | Foundation pit support structure and construction method thereof | |
| JP2011214248A (en) | Structure for reinforcing embankment | |
| WO2019136856A1 (en) | Supporting structure and construction method therefor, and superimposed pile wall doubling as supporting structure | |
| CN113202112A (en) | Assembled foundation pit supporting method | |
| CN111119908A (en) | Semi-open-cut and semi-underground-cut multi-arch tunnel structure and construction method thereof | |
| US5921716A (en) | Apparatus and method for forming a barrier wall | |
| JP3051321B2 (en) | Double sheet pile structure | |
| KR101851279B1 (en) | Construction method of low-depth cutoff wall using steel plates connected in sequence | |
| JP4088871B2 (en) | Impermeable wall structure and impermeable wall structure using the impermeable wall | |
| CN214784003U (en) | Assembled underground structure | |
| JPH09125417A (en) | Basement wall body and asymmetrically closed section steel pile | |
| JP2009068203A (en) | Earth retaining wall composed of horizontal sheathing with soldier beam, and cut-off structure, construction method and cut-off method for the earth retaining wall | |
| KR102119948B1 (en) | Connector assembly and pile wall structure | |
| KR200258949Y1 (en) | Trusstype support structures for building landslide protection wall | |
| KR20120054290A (en) | Wall pile | |
| KR20040057061A (en) | Connecting structure of steel pipe sheet piles | |
| KR100724781B1 (en) | A sheathing board | |
| CN221399092U (en) | Precast pile plate type retaining structure | |
| CN113404055B (en) | Inter-pile soil-retaining and water-stopping curtain structure and construction method thereof | |
| JPS6133066Y2 (en) | ||
| JP2006022565A (en) | Stress bearing member and construction method of underground continuous wall |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20220225 |
|
| RJ01 | Rejection of invention patent application after publication |