CN108252310B - Supporting structure using Larsen steel sheet pile and construction method thereof - Google Patents

Supporting structure using Larsen steel sheet pile and construction method thereof Download PDF

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Publication number
CN108252310B
CN108252310B CN201810197164.6A CN201810197164A CN108252310B CN 108252310 B CN108252310 B CN 108252310B CN 201810197164 A CN201810197164 A CN 201810197164A CN 108252310 B CN108252310 B CN 108252310B
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China
Prior art keywords
steel sheet
concrete
supporting
larsen steel
sheet piles
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CN201810197164.6A
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CN108252310A (en
Inventor
汪玉代
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Zhejiang Province Survey Of Ltd By Share Ltd
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Zhejiang Province Survey Of Ltd By Share Ltd
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    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D17/00Excavations; Bordering of excavations; Making embankments
    • E02D17/02Foundation pits
    • E02D17/04Bordering surfacing or stiffening the sides of foundation pits
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/02Sheet piles or sheet pile bulkheads
    • E02D5/03Prefabricated parts, e.g. composite sheet piles
    • E02D5/04Prefabricated parts, e.g. composite sheet piles made of steel

Abstract

The invention discloses a supporting structure using Larsen steel sheet piles and a construction method thereof, aiming at ensuring the enclosure of a supporting column foundation pit and ensuring that Larsen steel sheet piles which are not arranged orderly are all supported, and the technical scheme is characterized in that: the construction method comprises a plurality of Larsen steel sheet piles inserted into the ground, wherein the Larsen steel sheet piles surround to form a foundation pit enclosure, the foundation pit enclosure is arranged in a rectangular shape, concrete beams are poured on four inner side walls of the foundation pit enclosure, the concrete beams are horizontally arranged, a plurality of groups of supporting assemblies used for supporting the two concrete beams are arranged between the two symmetrical concrete beams, connecting pieces connected with the corresponding concrete beams are welded on the side walls of the Larsen steel sheet piles facing the concrete beams, and the connecting pieces are poured on the concrete beams. According to the supporting structure utilizing the Larsen steel sheet piles and the construction method thereof, the enclosure of the foundation pit of the supporting column can be ensured, and the Larsen steel sheet piles which are not arranged orderly are supported.

Description

Supporting structure using Larsen steel sheet pile and construction method thereof
Technical Field
The invention relates to the field of constructional engineering, in particular to a supporting structure utilizing Larsen steel sheet piles and a construction method thereof.
Background
The foundation pit support is a retaining, reinforcing and protecting measure adopted for the side wall of the foundation pit and the surrounding environment in order to ensure the safety of the construction of an underground structure and the surrounding environment of the foundation pit.
The foundation pit support is defined by the national industry standard of people's republic of China ' technical Specification for building foundation pit support ' JGJ120-2012 as follows: in order to protect the safety of the construction of the underground main body structure and the surrounding environment of the foundation pit, the foundation pit adopts the measures of temporary retaining, reinforcing, protecting and underground water controlling.
In the existing foundation pit support, Larsen steel sheet piles are used, and are arranged and inserted into the ground during construction, then the foundation pit begins to be excavated, and steel pipes or profile steel are used for supporting the Larsen steel sheet piles, so that the Larsen steel sheet piles are prevented from toppling.
However, when the larsen steel sheet piles are inserted into the ground, it cannot be guaranteed that a plurality of larsen steel sheet piles are arranged in a straight line, and thus, the larsen steel sheet piles which are deviated due to the deviation of parts of larsen steel sheet piles cannot abut against corresponding steel pipes or profile steels, so that the steel pipes or the profile steels cannot normally support the deviated stay rope steel sheet piles, and potential safety hazards are easy to occur.
Therefore, a new solution is needed to solve this problem.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a supporting structure utilizing Larsen steel sheet piles and a construction method thereof, which can ensure the enclosure of a supporting column foundation pit and ensure that Larsen steel sheet piles which are not arranged orderly are all supported.
The technical purpose of the invention is realized by the following technical scheme: the utility model provides an utilize supporting construction of larsen steel sheet pile includes that a plurality of inserts the larsen steel sheet pile of locating on ground, a plurality of larsen steel sheet pile surrounds into the foundation ditch and protects and encloses, the foundation ditch protects and encloses and be the rectangle setting, concrete beam has all been pour to four inside walls that the foundation ditch protected, concrete beam is the level setting, is provided with a plurality of groups between two wherein symmetrical concrete beam and is used for supporting the supporting component of these two concrete beams, larsen steel sheet pile has the connecting piece of being connected with corresponding concrete beam towards the lateral wall welding of concrete beam, the connecting piece pour in concrete beam.
By adopting the technical scheme, the side walls of the Larsen steel sheet piles in the same row with the foundation pit retaining walls can be abutted through the concrete beams, the two symmetrical concrete beams are supported through the support assembly, the corresponding concrete beams can be abutted against the Larsen steel sheet piles in the same row, and the Larsen steel sheet piles are also abutted through the concrete beams when the Larsen steel sheet piles are not regularly arranged; and meanwhile, the connection of the concrete beam and the Larsen steel sheet pile is ensured through the connecting piece.
The invention is further configured to: the support assembly comprises two connecting plates fixedly connected to the side walls of the two symmetrical concrete beams respectively, and support steel pipes with two ends fixedly connected to the corresponding connecting plates respectively.
Through adopting above-mentioned technical scheme, play through supporting the steel pipe and support two symmetrical concrete beams to avoid larsen steel sheet pile to appear empting the condition.
The invention is further configured to: the supporting steel pipe is characterized in that two ends of the supporting steel pipe are fixedly connected with abutting blocks respectively, the abutting blocks abut against the corresponding connecting plates, and the abutting blocks are connected with the corresponding connecting plates through bolts.
Through adopting above-mentioned technical scheme, can conveniently dismantle the support steel pipe through butt joint piece and connecting plate bolted connection, when needs excavate the foundation ditch or construct in the foundation ditch down, demolish the support steel pipe that corresponds through unscrewing the bolt.
The invention is further configured to: the connecting piece is the square ring shape setting, and the connecting piece is vertical setting.
Through adopting above-mentioned technical scheme, be square ring through the connecting piece, ensure that connecting piece and concrete beam are fully connected.
The invention is further configured to: the side wall of the Larsen steel plate pile is provided with an inclined pull rod, the inclined pull rod is obliquely arranged, the upper end face of the inclined pull rod is welded on the Larsen steel plate pile, the lower end face of the inclined pull rod is welded on the upper end face of the connecting piece, and the inclined pull rod is partially poured on the concrete beam.
Through adopting above-mentioned technical scheme, further be fixed in the larsen steel sheet pile with the connecting piece through the diagonal draw bar to diagonal draw bar portion pours in the concrete beam, can ensure larsen steel sheet pile and concrete beam fixed connection.
The invention is further configured to: a plurality of reinforcing bars are poured in the concrete beam, the reinforcing bars penetrate through the inner cavity of the connecting piece, and the reinforcing bars are fixedly connected with the connecting piece.
Through adopting above-mentioned technical scheme, pour the intensity that can effectively improve the concrete beam in the concrete beam through the reinforcing bar to the condition of rupture appears in the concrete beam is prevented.
The invention is further configured to: a supporting beam is poured between the two adjacent concrete beams, the supporting beam is horizontally arranged, and two ends of the supporting beam are respectively abutted to the inner side walls of the two adjacent concrete beams.
Through adopting above-mentioned technical scheme, can support two adjacent concrete beams through a supporting beam, improve concrete beam's support intensity.
The invention is further configured to: the construction method of the supporting structure comprises the following steps of S1: firstly, pressing a plurality of Larsen steel sheet piles into the ground through a pile driver, and ensuring that the Larsen steel sheet piles surround a rectangular foundation pit enclosure; step S2: excavating surface soil on the inner surface layer of the foundation pit enclosure to expose the upper section of the Larsen steel sheet pile; step S3: welding connecting pieces on the side walls of the Larsen steel sheet piles, welding diagonal draw bars between the connecting pieces and the Larsen steel sheet piles, enabling all the connecting pieces to be located at the same horizontal position, then penetrating steel bars into a plurality of connecting pieces, fixing the steel bars to the connecting pieces through steel wires, then splicing the connecting pieces to form a concrete forming cavity by using wood plates outside the connecting pieces, enabling the concrete forming cavity to surround the enclosure of the foundation pit, fixing the connecting plates to the inner side walls of the concrete forming cavity when the concrete forming cavity is spliced, fixedly connecting abutting blocks at two ends of each supporting steel pipe with corresponding connecting plate bolts, and then pouring cement into the concrete forming cavity to form the cement into a concrete beam; step S4: and after the cement is solidified, removing the wood board for building the concrete forming cavity, and then continuously excavating the soil in the foundation pit enclosure, so that a foundation pit is formed in the foundation pit enclosure, and meanwhile, the construction of the foundation pit supporting structure is completed.
Through adopting above-mentioned technical scheme, can pour out the concrete beam at Larsen steel sheet pile lateral wall through above-mentioned protection to ensure concrete beam and corresponding Larsen steel sheet pile fixed connection, through the concrete beam of two symmetries of support steel pipe support column.
In conclusion, the invention has the following beneficial effects:
firstly, the side walls of the Larsen steel sheet piles in the same row with the foundation pit retaining walls can be abutted through the concrete beams, the two symmetrical concrete beams are supported through the support assembly, the corresponding concrete beams can be abutted against the Larsen steel sheet piles in the same row, and the Larsen steel sheet piles can be abutted through the concrete beams when the Larsen steel sheet piles are not arranged orderly; (ii) a
And secondly, the strength of the concrete beam is effectively improved and the concrete beam is ensured to be fixedly connected with the corresponding Larsen steel sheet pile through the diagonal draw bars and the plurality of steel bars penetrating through the connecting piece.
Drawings
FIG. 1 is a schematic structural diagram of the first embodiment;
FIG. 2 is a cross-sectional view of the first embodiment;
fig. 3 is an enlarged view of a portion a of fig. 2.
In the figure: 1. larsen steel sheet piles; 2. protecting the foundation pit; 3. a concrete beam; 4. a connecting member; 5. a connecting plate; 6. supporting the steel pipe; 7. a butting block; 8. reinforcing steel bars; 9. a support beam; 10. and a diagonal draw bar.
Detailed Description
The invention is described in detail below with reference to the figures and examples.
The first embodiment is as follows: a supporting structure utilizing Larsen steel sheet piles is shown in figures 1 and 2 and comprises a plurality of Larsen steel sheet piles 1 inserted into the ground, a rectangular foundation pit enclosure 2 is formed by the Larsen steel sheet piles 1 in an enclosing mode, and the inner cavity of the foundation pit enclosure 2 is a foundation pit. And the foundation ditch protects 2 four your lateral walls of enclosing and has all pour concrete beam 3, concrete beam 3 is the level setting, four 3 integrated into one piece of concrete beam, as shown in fig. 3, 1 lateral wall of larsen steel sheet pile has still welded connecting piece 4, connecting piece 4 is square ring shape and material for the round steel, and connecting piece 4 is vertical setting, and a plurality of connecting piece 4 is located same horizontal position and pours in concrete beam 3, wherein be provided with the support subassembly that a plurality of groups supported two corresponding concrete beams 3 between two symmetrical concrete beams 3. Therefore, the side walls of the Larsen steel sheet piles 1 which are positioned in the same row with the foundation pit enclosure 2 can be abutted through the concrete beams 3, the two symmetrical concrete beams 3 are supported through the support assembly, the corresponding concrete beams 3 can be abutted against the Larsen steel sheet piles 1 in the same row, and the Larsen steel sheet piles 1 can be abutted through the concrete beams 3 when the Larsen steel sheet piles 1 are not arranged orderly; and meanwhile, the connection of the concrete beam 3 and the Larsen steel sheet pile 1 is ensured through the connecting piece 4.
As shown in fig. 3, each group of supporting components comprises two connecting plates 5 respectively poured on a concrete beam 3, the side wall of each connecting plate 5 is flush with the side wall of the concrete beam 3 or protrudes from the side wall of the concrete beam 3, a supporting steel pipe 6 is installed between the two symmetrical connecting plates 5, two ends of the supporting steel pipe 6 are fixedly connected with abutting blocks 7, the abutting blocks 7 are arranged in a cuboid shape, the two abutting blocks 7 can abut against the corresponding connecting plates 5 respectively, and the abutting blocks 7 are fixedly connected with the corresponding connecting plates 5 through bolts. Thus, the support steel pipe 6 is used for supporting two symmetrical concrete beams 3 and preventing the Larsen steel sheet pile 1 from toppling; simultaneously can conveniently dismantle a support steel pipe 6 through butt joint piece 7 and connecting plate 5 bolted connection, when needs excavate the foundation ditch or construct in the foundation ditch down, demolish corresponding support steel pipe 6 through unscrewing the bolt.
In order to increase the strength of the concrete beam 3, as shown in fig. 1 and 3, a plurality of steel bars 8 are poured in the concrete beam 3, the plurality of steel bars 8 penetrate through the inner cavity of the connecting member 4, and the plurality of steel bars 8 are fixedly connected to the corresponding connecting member 4 through steel wires. Simultaneously pour a supporting beam 9 between two adjacent concrete beam 3, a supporting beam 9 is formed by concrete placement to a supporting beam 9 is the level setting, and the both ends of a supporting beam 9 butt respectively in two adjacent concrete beam 3's inside wall. Pour the intensity that can effectively improve concrete beam 3 in concrete beam 3 through reinforcing bar 8 like this to prevent that the condition of rupture from appearing in concrete beam 3, can support two adjacent concrete beams 3 through a supporting beam 9 simultaneously, improve concrete beam 3's support intensity.
In order to ensure that the larsen steel sheet pile 1 is fixedly connected with the concrete beam 3, as shown in fig. 1, a diagonal draw bar 10 is welded between the larsen steel sheet pile 1 and the connecting member 4, the diagonal draw bar 10 is made of round steel, the diagonal draw bar 10 is obliquely arranged, the upper end face of the diagonal draw bar 10 is welded on the side wall of the larsen steel sheet pile 1, the lower end face is fixedly connected with the upper end face of the connecting member 4 by welding, and the lower section part of the diagonal draw bar 10 is poured in the concrete beam 3. Thus, the connecting piece 4 is further fixed on the Larsen steel plate pile 1 through the diagonal draw bar 10, and the diagonal draw bar 10 is partially poured in the concrete beam 3, so that the Larsen steel plate pile 1 and the concrete beam 3 can be fixedly connected.
Example two: a construction method of a foundation pit support aims at the construction method of the first embodiment: the construction method comprises the following steps of S1: firstly, pressing a plurality of Larsen steel sheet piles 1 into the ground through a pile driver, wherein the pile driver can be a vibrating pile hammer, pressing the Larsen steel sheet piles 1 into the ground through the vibrating pile hammer, ensuring that the Larsen steel sheet piles 1 surround a rectangular foundation pit enclosure 2, and keeping the bottom surface close to the Larsen steel sheet piles 1 flat; step S2: excavating surface soil on the inner surface layer of the foundation pit enclosure 2 to expose the upper section of the Larsen steel sheet pile 1; step S3: welding connecting pieces 4 on the side walls of Larsen steel sheet piles 1, welding diagonal draw bars 10 between the connecting pieces 4 and the Larsen steel sheet piles 1, enabling all the connecting pieces 4 to be located at the same horizontal position, then penetrating steel bars 8 into a plurality of the connecting pieces 4, fixing the steel bars 8 to the connecting pieces 4 through steel wires, then splicing the outer sides of the connecting pieces 4 into a concrete forming cavity by using wood boards, enabling the concrete forming cavity to surround a foundation pit enclosure 2, fixing connecting plates 5 on the inner side walls of the concrete forming cavity when the concrete forming cavity is spliced, fixedly connecting abutting blocks 7 at two ends of a supporting steel pipe 6 with corresponding connecting plates 5 through bolts, and then pouring cement into the concrete forming cavity to form concrete beams 3; step S4: after the cement is solidified, the wood plate for building the concrete forming cavity is removed, and then the soil in the foundation pit enclosure 2 is continuously excavated, so that a foundation pit is formed in the foundation pit enclosure 2, and meanwhile, the construction of the foundation pit supporting structure is completed.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.

Claims (6)

1. The utility model provides an utilize supporting construction of larsen steel sheet pile (1), inserts the larsen steel sheet pile (1) of locating on ground including a plurality of larsen steel sheet pile (1) surrounds into foundation ditch enclosure (2), foundation ditch enclosure (2) are rectangle setting, its characterized in that: concrete beam (3) have all been pour to four inside walls of foundation ditch fender (2), concrete beam (3) are the level setting, are provided with the supporting component that a plurality of groups are used for supporting these two concrete beam (3) between two symmetrical concrete beam (3) wherein, larsen steel sheet pile (1) has connecting piece (4) of being connected with corresponding concrete beam (3) towards the lateral wall welding of concrete beam (3), connecting piece (4) pour in concrete beam (3), connecting piece (4) are the square ring shape and set up, and connecting piece (4) are vertical setting, a plurality of reinforcing bars (8) have been pour in concrete beam (3), reinforcing bar (8) are worn to locate connecting piece (4) inner chamber, just reinforcing bar (8) with connecting piece (4) fixed connection.
2. The supporting structure using larsen steel sheet piles as claimed in claim 1, wherein: the supporting component comprises two connecting plates (5) which are respectively fixedly connected to the side walls of the two symmetrical concrete beams (3) and supporting steel pipes (6) of which the two ends are respectively fixedly connected to the corresponding connecting plates (5).
3. The supporting structure using larsen steel sheet piles as claimed in claim 2, wherein: the support steel pipe (6) both ends difference fixedly connected with butt piece (7), butt piece (7) butt in connecting plate (5) that correspond, butt piece (7) with correspond connecting plate (5) bolted connection.
4. A supporting construction using larsen steel sheet piles according to claim 3, wherein: larsen steel sheet pile (1) lateral wall is provided with oblique pull rod (10), oblique pull rod (10) are the slope and set up, just oblique pull rod (10) up end weld in Larsen steel sheet pile (1), the terminal surface welds in under oblique pull rod (10) connecting piece (4) up end, oblique pull rod (10) part pour in concrete beam (3).
5. The supporting structure using larsen steel sheet piles as claimed in claim 4, wherein: adjacent two a supporting beam (9) has been pour between concrete beam (3), supporting beam (9) are the level setting, and the both ends of supporting beam (9) butt respectively in the inside wall of adjacent two concrete beam (3).
6. A construction method using the supporting structure using larsen steel sheet piles as claimed in claim 5, wherein: the construction method comprises the following steps of S1: firstly, pressing a plurality of Larsen steel sheet piles (1) into the ground through a pile driver, and ensuring that the Larsen steel sheet piles (1) surround a rectangular foundation pit enclosure (2); step S2: excavating surface soil on the inner surface layer of the foundation pit enclosure (2) to expose the upper section part of the Larsen steel sheet pile (1); step S3: welding connecting pieces (4) on the side walls of Larsen steel sheet piles (1), welding diagonal draw bars (10) between the connecting pieces (4) and the Larsen steel sheet piles (1), enabling all the connecting pieces (4) to be located at the same horizontal position, then penetrating reinforcing steel bars (8) in a plurality of connecting pieces (4), fixing the reinforcing steel bars (8) to the connecting pieces (4) through steel wires, splicing the outer sides of the connecting pieces (4) into a concrete forming cavity by using wood boards, enabling the concrete forming cavity to surround a foundation pit enclosure (2), fixing connecting plates (5) on the inner side walls of the concrete forming cavity when the concrete forming cavity is spliced, fixedly connecting abutting blocks (7) at two ends of a supporting steel pipe (6) with corresponding connecting plates (5) through bolts, and pouring cement in the concrete forming cavity to form concrete beams (3); step S4: after the cement is solidified, the wood boards used for assembling the concrete forming cavity are dismantled, and then the soil in the foundation pit enclosure (2) continues to be excavated, so that a foundation pit is formed in the foundation pit enclosure (2), and meanwhile, the construction of the foundation pit supporting structure is completed.
CN201810197164.6A 2018-03-10 2018-03-10 Supporting structure using Larsen steel sheet pile and construction method thereof Active CN108252310B (en)

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Publication number Priority date Publication date Assignee Title
CN109113071B (en) * 2018-08-30 2021-02-19 四川国泰建设工程有限公司 Construction method for deep well retaining wall steel structure support
CN109295985A (en) * 2018-09-19 2019-02-01 郑州安源工程技术有限公司 Campshed can be recycled to the design and construction method of support supporting construction in a kind of flexible compound assembled
CN109295986A (en) * 2018-09-19 2019-02-01 郑州安源工程技术有限公司 The design and construction method of Retaining Structure with Double-row Piles can be recycled in a kind of flexible compound lattice
CN109385990B (en) * 2018-10-31 2020-10-09 佛山科学技术学院 Steel sheet pile ground is wall even

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KR20160057747A (en) * 2014-11-14 2016-05-24 우경기술주식회사 Prestressed wale for temporary facility
CN105133620B (en) * 2015-08-19 2017-06-30 中国建筑第八工程局有限公司 Pit supporting construction and its construction method in local flow's modeling shape Muddy Bottoms soil body hole
CN205776249U (en) * 2016-05-27 2016-12-07 中国建筑西南勘察设计研究院有限公司 A kind of combined inner supporting structure
CN206052741U (en) * 2016-06-14 2017-03-29 江苏燕宁建设工程有限公司 A kind of steel sheet-pile cofferdam for supporting cushion cap foundation ditch

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