CN113513025A - Foundation pit support form LHCW construction method - Google Patents
Foundation pit support form LHCW construction method Download PDFInfo
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- CN113513025A CN113513025A CN202110431519.5A CN202110431519A CN113513025A CN 113513025 A CN113513025 A CN 113513025A CN 202110431519 A CN202110431519 A CN 202110431519A CN 113513025 A CN113513025 A CN 113513025A
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- shaped steel
- larsen
- lhcw
- sheet pile
- steel sheet
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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
- E02D5/02—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
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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
- E02D5/02—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
Abstract
The invention discloses an LHCW construction method for a foundation pit support form, which relates to the technical field of foundation pit support, and comprises a tool body and the LHCW construction method, wherein the tool body comprises first H-shaped steel, second H-shaped steel, a first Larsen steel sheet pile, a second Larsen steel sheet pile, U-shaped steel clamping grooves, welding seams, an H-shaped steel connecting beam and an H-shaped steel purlin, the first Larsen steel sheet pile is arranged between one side of each of the two U-shaped steel clamping grooves and the H-shaped steel purlin, two sides of each of the first Larsen steel sheet pile are connected with the second Larsen steel sheet pile in a buckling mode, the welding seams are arranged between the two U-shaped steel clamping grooves and the first Larsen steel sheet pile, one end of the first H-shaped steel is arranged on the inner sides of the two U-shaped steel clamping grooves, and the other side of the first H-shaped steel is connected with the H-shaped steel connecting beam. The enclosure structure provided by the invention has the advantages of novel structure, convenience in installation, reliable performance, greenness, environmental protection, effective resource saving and capability of recycling all components.
Description
Technical Field
The invention relates to the technical field of foundation pit support, in particular to a foundation pit support type LHCW construction method.
Background
The foundation pit enclosure is a method for building various underground buildings such as a multi-layer basement, an underground railway, an underground commercial street and the like by developing and utilizing an underground space. There are gravity type mixing pile retaining wall, underground continuous wall, pile row retaining wall, etc. The stability of the foundation pit and the safety and convenience of operation in the pit are ensured, and the displacement of the soil body 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.
With the rapid development of national economy, the construction industry is also rapidly advanced, and foundation pit enclosure engineering in foundation and foundation engineering is the first place to take the lead. The common foundation pit support structure comprises an underground continuous wall, a drilling and grouting pile arrangement, a pile in an SMW construction method and the like, a large amount of slurry is generated during operation of the processes, the surrounding environment is greatly polluted, and meanwhile, a large amount of cement is required to be used, and a large amount of resources are consumed.
From the above, a foundation pit support type LHCW construction method is designed for solving the problems.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides an LHCW construction method for a foundation pit enclosure form.
In order to achieve the purpose, the invention adopts the following technical scheme:
the tool body comprises first H-shaped steel, second H-shaped steel, first Larsen steel plate piles, second Larsen steel plate piles, U-shaped steel clamping grooves, welding seams, H-shaped steel connecting beams and H-shaped steel purlins, the first Larsen steel plate piles are installed between one sides of the U-shaped steel clamping grooves and the H-shaped steel purlins, the two sides of the first Larsen steel plate piles are connected with the second Larsen steel plate piles in a buckling mode, the welding seams are arranged between the two U-shaped steel clamping grooves and the first Larsen steel plate piles, one ends of the first H-shaped steel are installed on the inner sides of the two U-shaped steel clamping grooves, the other sides of the first H-shaped steel are connected with the H-shaped steel connecting beams, and one sides, far away from the first H-shaped steel, of the H-shaped steel connecting beams are connected with the second H-shaped steel.
Preferably, the first H-shaped steel and the second H-shaped steel are connected through an H-shaped steel connecting beam in a welding mode to form the door type enclosure structure.
Preferably, one end of the first H-shaped steel is fixedly connected with the two U-shaped steel clamping grooves in an embedded mode.
Preferably, the first larsen steel plate pile and the second larsen steel plate pile are provided with adaptive locking notches on two sides.
Preferably, every two groups of the first H-shaped steel, the first Larsen steel plate pile and the two U-shaped steel clamping groove continuous structures are connected through an H-shaped steel connecting beam to form a continuous door type structure.
Preferably, one side of each U-shaped steel clamping groove is connected with the corresponding first Larsen steel sheet pile in a welding mode through a welding seam.
Preferably, the LHCW construction method comprises a method for excavating a foundation pit with the depth of 8 m or more by combining the combined stress of the first Larsen steel sheet pile, the second Larsen steel sheet pile, the first H-shaped steel and the second H-shaped steel and using soft soil and a general non-hard soil layer, and constructing without generating mud.
Preferably, the foundation pit support form LHCW construction method comprises the following steps:
s1, measuring a paying-off leveling field, installing a tool body and adjusting the level;
s2, inserting the first Larsen steel plate pile, the second Larsen steel plate pile, the first H-shaped steel and the second H-shaped steel, and adjusting and fixing;
s3, driving the first Larsen steel plate pile, the second Larsen steel plate pile, the first H-shaped steel and the second H-shaped steel to a preset height through a pile driver, hoisting the tool body to enter the next section of construction after driving is finished, and thus driving the first Larsen steel plate pile, the second Larsen steel plate pile, the first H-shaped steel and the second H-shaped steel continuous wall is finished;
s4, digging a first layer of soil, and enabling the dug soil pit to meet the requirement of supporting construction to carry out supporting construction;
s5, when the excavation work in the step S is carried out, firstly excavating earth to the bottom of the pit, then pouring a bottom plate basement structure, and then backfilling earth;
and S6, after the work in the step S is finished, removing the supporting structure, and removing the LHCW fender pile.
Compared with the prior art, the invention has the beneficial effects that:
1. when the steel plate pile is used, the first Larsen steel plate pile, the second Larsen steel plate pile, the first H-shaped steel and the second H-shaped steel are fixedly embedded and connected through the U-shaped clamping grooves, construction is simple and convenient, recycling is convenient, and the turnover rate of the H-shaped steel is higher.
2. The first Larsen steel sheet pile, the second Larsen steel sheet pile, the first H-shaped steel and the second H-shaped steel are all constructed by adopting a pile pressing machine in a static pressure mode, and the construction method is free of noise and mud pollution on site.
3. The LHCW construction method portal type enclosure structure is suitable for soft soil and common non-hard soil layers, is combined with a corresponding support system, and can be suitable for excavating foundation pits with the depth of 8 meters or more. Meanwhile, the construction machine occupies a small area, is single in machine and is suitable for construction in limited places.
The enclosure structure provided by the invention has the advantages of novel structure, convenience in installation, reliable performance, greenness, environmental protection, effective resource saving and capability of recycling all components.
Drawings
FIG. 1 is a schematic structural diagram of a foundation pit support type LHCW construction method provided by the invention;
FIG. 2 is a schematic diagram of a first H-shaped steel jump-insert structure of a foundation pit support type LHCW construction method provided by the invention;
FIG. 3 is a top view of FIG. 1;
fig. 4 is a top view of fig. 2.
In the figure: 1 first H shaped steel, 2 first larsen steel sheet piles, 3U shaped steel draw-in grooves, 4 welding seams, 5H shaped steel coupling beams, 6H shaped steel purlins, 7 second larsen steel sheet piles and 8 second H shaped steel.
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.
Referring to fig. 1-4, an LHCW construction method for a foundation pit enclosure form comprises a tool body and the LHCW construction method, wherein the tool body comprises a first H-shaped steel 1, a second H-shaped steel 8, a first Larsen steel sheet pile 2, a second Larsen steel sheet pile 7, U-shaped steel clamping grooves 3, welding seams 4, an H-shaped steel coupling beam 5 and an H-shaped steel purlin 6, the first Larsen steel sheet pile 2 is arranged between one side of each of the two U-shaped steel clamping grooves 3 and the H-shaped steel purlin 6, two sides of each of the first Larsen steel sheet pile 2 are connected with the second Larsen steel sheet pile 7 in a buckling mode, the welding seams 4 are arranged between the two U-shaped steel clamping grooves 3 and the first Larsen steel sheet pile 2, and one side of the two U-shaped steel clamping grooves 3 is connected with the first Larsen steel sheet pile 2 in a welding mode through the welding seams 4;
one end of the first H-shaped steel 1 is arranged on the inner sides of the two U-shaped steel clamping grooves 3, the other side of the first H-shaped steel 1 is connected with an H-shaped steel connecting beam 5, and one side, far away from the first H-shaped steel 1, of the H-shaped steel connecting beam 5 is connected with a second H-shaped steel 8;
more specifically, the first H-shaped steel 1 and the second H-shaped steel 8 are connected through an H-shaped steel connecting beam 5 in a welding mode to form a door type enclosure structure; one end of the first H-shaped steel 1 is fixedly connected with the two U-shaped steel clamping grooves 3 in an embedded mode; both sides of the first Larsen steel plate pile 2 and the second Larsen steel plate pile 7 are provided with adaptive locking notches;
wherein every two groups of continuous structures of the first H-shaped steel 1, the first Larsen steel sheet pile 2 and the two U-shaped steel clamping grooves 3 are connected through an H-shaped steel connecting beam 5 to form a continuous door type structure;
more specifically, the LHCW construction method comprises a method for excavating a foundation pit with the depth of 8 meters or more by being used for soft soil and common non-hard soil layers and combining the combined stress of the first Larsen steel sheet pile 2, the second Larsen steel sheet pile 7, the first H-shaped steel 1 and the second H-shaped steel 8, and the construction does not generate slurry.
With the rapid development of national economy, the construction industry is also rapidly advanced, and foundation pit enclosure engineering in foundation and foundation engineering is the first place to take the lead. The common foundation pit support structure comprises an underground continuous wall, a drilling and grouting pile arrangement, a pile in an SMW construction method and the like, a large amount of slurry is generated during operation of the processes, the surrounding environment is greatly polluted, and meanwhile, a large amount of cement is required to be used, and a large amount of resources are consumed. In view of the advantages and disadvantages of the enclosure forms, a novel Larsen H-shaped steel continuous wall (a foundation pit enclosure form LHCW construction method) is researched to replace the existing SMW construction method for use by combining the engineering practice of the department.
Examples
A foundation pit support form LHCW construction method is used for replacing the existing SMW construction method and comprises the following steps:
s1, measuring a paying-off leveling field, installing a tool body and adjusting the level; the first H-shaped steel (1 and the first Larsen steel sheet pile 2 are fixedly embedded through the U-shaped steel clamping groove 3, so that the first H-shaped steel (1) is stable in stress position;
s2, inserting the first Larsen steel sheet pile 2, the second Larsen steel sheet pile 7 and the first H-shaped steel (1 and the second H-shaped steel (8), and adjusting and fixing;
referring to fig. 1 to 2, the first H-section steel (1 may be inserted continuously into the first larsen steel sheet pile 2 and the second larsen steel sheet pile 7, or one H-section steel (1 may be inserted one by one into the first larsen steel sheet pile 2 and the second larsen steel sheet pile 7;
s3, driving the first Larsen steel plate pile 2, the second Larsen steel plate pile 7 and the first H-shaped steel (1 and the second H-shaped steel (8 reach a preset height, and hoisting the tool body to enter the next section of construction after driving is finished) through a pile driver, so that driving of the first Larsen steel plate pile 2, the second Larsen steel plate pile 7, the first H-shaped steel (1 and the second H-shaped steel (8 continuous wall is driven;
the continuous structure of the first H-shaped steel (1) and the second H-shaped steel (8, the first Larsen steel sheet pile 2, the second Larsen steel sheet pile 7 and the U-shaped steel clamping groove 3 are connected through the H-shaped steel connecting beam 5 to form a continuous door type structure, and the stress characteristic is better than that of a single enclosure structure;
s4, digging a first layer of soil, and enabling the dug soil pit to meet the requirement of supporting construction to carry out supporting construction;
s5, when the excavation work in the step S4 is carried out, firstly, excavation is carried out until the bottom of the pit is reached, then, a bottom plate basement structure is poured, and then, earth is backfilled;
s6, removing the support structure and removing the LHCW fender post after the work in step S5 is completed.
It should be noted that, referring to fig. 1-2 and fig. 3-4, for foundation pits of different specifications, a form of H-shaped steel close insertion or one skip insertion may be selected.
Through above-mentioned envelope, when using, first larsen steel sheet pile 2, second larsen steel sheet pile 7, first H shaped steel (1 and second H shaped steel (8 adopt U type draw-in groove 3 to inlay solid and connect, and the construction is simple and convenient, retrieves the convenience, and the turnover rate of H shaped steel is higher.
2. The steel plate pile comprises a first Larsen steel plate pile 2, a second Larsen steel plate pile 7 and first H-shaped steel (1 and second H-shaped steel (8) which are constructed by adopting a pile press in a static pressure mode, and is noiseless on site and free of mud discharge pollution.
3. The LHCW construction method portal type enclosure structure is suitable for soft soil and common non-hard soil layers, is combined with a corresponding support system, and can be suitable for excavating foundation pits with the depth of 8 meters or more. Meanwhile, the construction machine occupies a small area, is single in machine and is suitable for construction in limited places.
The enclosure structure provided by the invention has the advantages of novel structure, convenience in installation, reliable performance, greenness, environmental protection, effective resource saving and capability of recycling all components.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the equipment or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (8)
1. A foundation pit support form LHCW construction method is characterized by comprising a tool body and the LHCW construction method, wherein the tool body comprises first H-shaped steel (1), second H-shaped steel (8), first Larsen steel sheet piles (2), second Larsen steel sheet piles (7), U-shaped steel clamping grooves (3), welding seams (4), an H-shaped steel connecting beam (5) and an H-shaped steel purlin (6), the first Larsen steel sheet pile (2) is installed between one side of each of the two U-shaped steel clamping grooves (3) and the H-shaped steel purlin (6), the two sides of the first Larsen steel sheet pile (2) are connected with the second Larsen steel sheet piles (7) in a buckling mode, the welding seams (4) are arranged between the two U-shaped steel clamping grooves (3) and the first Larsen steel sheet pile (2), one end of the first H-shaped steel (1) is installed on the inner sides of the two U-shaped steel clamping grooves (3), and the other side of the first H-shaped steel (1) is connected with the H-shaped steel connecting beam (5), and one side of the H-shaped steel connecting beam (5) far away from the first H-shaped steel (1) is connected with a second H-shaped steel (8).
2. The LHCW construction method for a foundation pit support form of claim 1, wherein the first H-shaped steel (1) and the second H-shaped steel (8) are welded and connected through an H-shaped steel connecting beam (5) to form a portal support structure.
3. The LHCW construction method for a foundation pit support form of claim 1, wherein one end of the first H-shaped steel (1) is fixedly connected with the two U-shaped steel clamping grooves (3).
4. The LHCW construction method for foundation pit support according to claim 1, wherein the first Larsen steel sheet pile (2) and the second Larsen steel sheet pile (7) are provided with adaptive locking notches at both sides.
5. The LHCW construction method for foundation pit support forms is characterized in that every two groups of continuous structures of the first H-shaped steel (1), the first Larsen steel sheet pile (2) and the two U-shaped steel clamping grooves (3) are connected through an H-shaped steel connecting beam (5) to form a continuous door type structure.
6. The LHCW construction method for foundation pit support form of claim 1, wherein one side of the two U-shaped steel slots (3) is welded with the first Larsen steel sheet pile (2) through a welding seam (4).
7. The LHCW construction method for foundation pit support form of claim 1, wherein the LHCW construction method comprises a method for soft soil and general non-hard soil layer, combining the combined stress of the first Larsen steel sheet pile (2), the second Larsen steel sheet pile (7), the first H-shaped steel (1) and the second H-shaped steel (8), excavating foundation pit with the depth of 8 m or more, and constructing without mud.
8. The LHCW construction method of a foundation pit envelope of claim 7, comprising the steps of:
s1, measuring a paying-off leveling field, installing a tool body and adjusting the level;
s2, inserting the first Larsen steel sheet pile (2), the second Larsen steel sheet pile (7), the first H-shaped steel (1) and the second H-shaped steel (8), and adjusting and fixing;
s3, driving the first Larsen steel plate pile (2), the second Larsen steel plate pile (7), the first H-shaped steel (1) and the second H-shaped steel (8) to a preset height through a pile driver, and hoisting the tool body to enter the next section of construction after driving is finished, so that driving of the first Larsen steel plate pile (2), the second Larsen steel plate pile (7), the first H-shaped steel (1) and the second H-shaped steel (8) continuous wall is finished;
s4, digging a first layer of soil, and enabling the dug soil pit to meet the requirement of supporting construction to carry out supporting construction;
s5, when the excavation work in the step S4 is carried out, firstly, excavation is carried out until the bottom of the pit is reached, then, a bottom plate basement structure is poured, and then, earth is backfilled;
s6, removing the support structure and removing the LHCW fender post after the work in step S5 is completed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110431519.5A CN113513025A (en) | 2021-04-21 | 2021-04-21 | Foundation pit support form LHCW construction method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110431519.5A CN113513025A (en) | 2021-04-21 | 2021-04-21 | Foundation pit support form LHCW construction method |
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| CN113513025A true CN113513025A (en) | 2021-10-19 |
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| CN202110431519.5A Pending CN113513025A (en) | 2021-04-21 | 2021-04-21 | Foundation pit support form LHCW construction method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114016520A (en) * | 2021-11-29 | 2022-02-08 | 中国十九冶集团有限公司 | Adjustable steel sheet pile supporting structure |
| CN115288151A (en) * | 2022-07-21 | 2022-11-04 | 中冶华天南京工程技术有限公司 | Assembled portal rigid frame structure supporting system and construction method thereof |
| CN115404847A (en) * | 2022-08-10 | 2022-11-29 | 东通岩土科技股份有限公司 | Composite pile diaphragm wall composed of Larsen steel sheet pile and H-shaped steel |
-
2021
- 2021-04-21 CN CN202110431519.5A patent/CN113513025A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114016520A (en) * | 2021-11-29 | 2022-02-08 | 中国十九冶集团有限公司 | Adjustable steel sheet pile supporting structure |
| CN115288151A (en) * | 2022-07-21 | 2022-11-04 | 中冶华天南京工程技术有限公司 | Assembled portal rigid frame structure supporting system and construction method thereof |
| CN115404847A (en) * | 2022-08-10 | 2022-11-29 | 东通岩土科技股份有限公司 | Composite pile diaphragm wall composed of Larsen steel sheet pile and H-shaped steel |
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