CN112832257A - Foundation pit enclosure type LHW construction method - Google Patents
Foundation pit enclosure type LHW construction method Download PDFInfo
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- CN112832257A CN112832257A CN202110198219.7A CN202110198219A CN112832257A CN 112832257 A CN112832257 A CN 112832257A CN 202110198219 A CN202110198219 A CN 202110198219A CN 112832257 A CN112832257 A CN 112832257A
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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
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/16—Arrangement or construction of joints in foundation structures
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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
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D7/00—Methods or apparatus for placing sheet pile bulkheads, piles, mouldpipes, or other moulds
- E02D7/20—Placing by pressure or pulling power
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Environmental & Geological Engineering (AREA)
- Bulkheads Adapted To Foundation Construction (AREA)
Abstract
The invention discloses a construction method of foundation pit enclosure form LHW, which relates to the technical field of foundation pit enclosure and comprises an enclosure structure and a LHW construction method, wherein the enclosure structure comprises two groups of H-shaped steel, a first Larsen steel sheet pile, a second Larsen steel sheet pile, two groups of L-shaped steel clamping grooves, two groups of locking steel plates, welding seams, an H-shaped steel coupling beam and an H-shaped steel purlin, two sides of the first Larsen steel sheet pile and the second Larsen steel sheet pile are respectively connected with the two groups of locking steel plates in an occlusion mode through locking notches, and the two groups of L-shaped steel clamping grooves are fixedly connected with one sides of the two groups of H-shaped steel in. The invention has novel structure, simple and convenient construction when in use, convenient independent recovery of components and high turnover rate of the H-shaped steel and the Larsen steel sheet pile; the static pressure construction of the pile pressing machine is adopted, so that no noise is generated on the site, and no mud discharge pollution is caused; the construction machine is suitable for excavating foundation pits with the depth of 8 meters or more, small in occupied area, single in machine and suitable for construction in limited places.
Description
Technical Field
The invention relates to the technical field of foundation pit bracing, in particular to a construction method of a foundation pit bracing form LHW.
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 development of the construction industry is also leap forward, and foundation pit enclosure engineering in foundation and foundation engineering is the first place to take the lead. The common foundation pit enclosure structure comprises an underground continuous wall, a drilling and grouting pile row, an SMW construction method pile and the like, a large amount of slurry can be replaced when the processes are operated, the surrounding environment is greatly influenced, a large amount of cement is used, a large amount of resources are consumed, and therefore a foundation pit enclosure form LHW construction method is designed for solving the problems.
Disclosure of Invention
The invention aims to solve the defects in the prior art, and provides a construction method of a foundation pit enclosure type LHW.
In order to achieve the purpose, the invention adopts the following technical scheme:
a foundation pit enclosure form LHW construction method comprises an enclosure structure and a LHW construction method, wherein the enclosure structure comprises two groups of H-shaped steel, a first Larsen steel sheet pile, a second Larsen steel sheet pile, two groups of L-shaped steel clamping grooves, two groups of locking steel plates, welding seams, H-shaped steel connecting beams and H-shaped steel purlins, two sides of the first Larsen steel sheet pile and the second Larsen steel sheet pile are respectively connected with the two groups of locking steel plates in an occlusion mode through locking notches, the two groups of L-shaped steel clamping grooves are connected with one sides of the two groups of H-shaped steel in an embedding mode, and the other sides of the two groups of H-shaped steel are connected with the other sides of the two groups of H;
the LHW construction method mainly comprises the following steps:
s1, measuring a paying-off leveling field, placing a positioning frame, and adjusting the level;
s2, inserting a first Larsen steel plate pile, a second Larsen steel plate pile, two groups of H-shaped steel and two groups of locking steel plates, enabling the H-shaped steel to be fixedly connected with one sides of the first Larsen steel plate pile and the second Larsen steel plate pile through two groups of L-shaped steel clamping grooves in an embedded mode, enabling two sides of the first Larsen steel plate pile and two sides of the second Larsen steel plate pile to be fixedly connected with the two groups of locking steel plates in an engaged mode respectively, and adjusting and fixing the two sides of the first Larsen steel plate pile;
s3, driving the first Larsen steel plate pile, the second Larsen steel plate pile, the two groups of locking steel plates and the two groups of H-shaped steel to a preset height through a pile driver, and lifting the enclosure structure to enter the next section of construction after driving is finished, so that driving of the first Larsen steel plate pile, the second Larsen steel plate pile, the two groups of locking steel plates and the two groups of H-shaped steel combined walls is finished;
s4, mounting an H-shaped steel purlin, carrying out support construction, excavating soil to the bottom of the pit, pouring a bottom plate basement structure, and backfilling the soil;
and S5, after the work in the step S4 is finished, the support structure of the enclosure structure is dismantled, and the LHW enclosure piles are pulled out.
Preferably, the two sides of the first larsen steel plate pile and the two sides of the second larsen steel plate pile, which are close to the fore shaft steel plates, are provided with fore shaft grooves matched with one sides of the two groups of fore shaft steel plates.
Preferably, the two groups of L-shaped steel clamping grooves are respectively connected with the two groups of locking steel plates in a welding mode.
Preferably, the heights of the first Larsen steel plate pile, the second Larsen steel plate pile, the two groups of H-shaped steel, the two groups of locking steel plates and the two groups of L-shaped steel clamping grooves are greater than the heights of the H-shaped steel purlin and the H-shaped steel connecting beam.
Compared with the prior art, the invention has the beneficial effects that:
1. the H-shaped steel and the locking steel plate are fixedly connected by adopting the L-shaped clamping grooves, the locking steel plate and the Larsen steel plate pile are connected by adopting the water-stopping locking, and when the steel pile is used, the construction is simple and convenient, the components are separately and conveniently recovered, and the turnover rate of the H-shaped steel and the Larsen steel plate pile is high;
2. the H-shaped steel, the first Larsen steel sheet pile, the second Larsen steel sheet pile and the locking steel sheet are all constructed by adopting a pile pressing machine in a static pressure manner, so that no noise is generated on site, and no mud pollution is generated;
3. the construction machine can be suitable for excavating foundation pits with the depth of 8 meters and above, and meanwhile, the construction machine occupies a small area and is single in machine and suitable for construction in limited fields.
Drawings
FIG. 1 is a schematic structural diagram of a foundation pit enclosure type LHW construction method provided by the invention;
FIG. 2 is a front view of a foundation pit enclosing form LHW construction method according to the present invention;
fig. 3 is an enlarged view of a part a of a foundation pit enclosing form LHW construction method provided by the invention.
In the figure: 1H shaped steel, 2 first Larsen steel sheet piles, 3L shape steel draw-in groove, 4 fore shaft steel sheets, 5 welding seams, 6H shaped steel coupling beams, 7H shaped steel purlin, 8 second Larsen steel sheet piles.
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. 1-3, a foundation pit enclosure form LHW construction method comprises an enclosure structure and a LHW construction method, wherein the enclosure structure comprises two groups of H-shaped steel 1, a first Larsen steel sheet pile 2, a second Larsen steel sheet pile 8, two groups of L-shaped steel clamping grooves 3, two groups of locking steel plates 4, a welding seam 5, an H-shaped steel coupling beam 6 and an H-shaped steel purlin 7, two sides of the first Larsen steel sheet pile 2 and the second Larsen steel sheet pile 8 are respectively connected with the two groups of locking steel plates 4 in an occlusion mode through locking notches, the two groups of L-shaped steel clamping grooves 3 are respectively connected with one sides of the two groups of H-shaped steel 1 in an embedding mode, and the other sides of the two groups of H-shaped steel 1 are respectively connected;
more specifically, the two sides of the first Larsen steel plate pile 2 and the second Larsen steel plate pile 8, which are close to the locking steel plates 4, and one side of the two groups of locking steel plates 4 are provided with adaptive locking grooves, the two groups of L-shaped steel clamping grooves 3 are respectively connected with the two groups of locking steel plates 4 in a welding manner, and the heights of the first Larsen steel plate pile 2, the second Larsen steel plate pile 8, the two groups of H-shaped steel 1, the two groups of locking steel plates 4 and the two groups of L-shaped steel clamping grooves 3 are greater than the heights of the H-shaped steel purlin 7 and the H-shaped steel connecting beam 6;
it should be noted that the H-shaped steel 1 and the locking steel plate 4 are fixedly embedded through the L-shaped steel clamping groove 3, so that the stress position of the H-shaped steel 1 is ensured to be stable; the H-shaped steel 1 is not rigidly connected with any member by welding and the like, and can be recycled independently; the combined structure of the two groups of H-shaped steel 1, the locking steel plate 4 and the L-shaped steel clamping groove 3 is connected through the H-shaped steel connecting beam 6 to form a portal enclosure structure, and the stress characteristic is better than that of a single enclosure structure. And the locking notch steel plate 4 is connected with the first Larsen steel plate pile 2 and the second Larsen steel plate pile 8 through a water-stopping locking notch, so that external water is prevented from permeating into the foundation pit.
Example one
When the foundation pit enclosure type LHW construction method is used for installing and using the enclosure structure, the construction method mainly comprises the following steps:
s1, measuring a paying-off leveling field, placing a positioning frame, and adjusting the level;
s2, inserting a first Larsen steel plate pile 2, a second Larsen steel plate pile 8, two groups of H-shaped steel 1 and two groups of locking steel plates 4, enabling the H-shaped steel 1 to be fixedly connected with one sides of the first Larsen steel plate pile 2 and the second Larsen steel plate pile 8 through two groups of L-shaped steel clamping grooves 3 in an embedded mode, enabling two sides of the first Larsen steel plate pile 2 and the second Larsen steel plate pile 8 to be fixedly connected with the two groups of locking steel plates 4 in an engaged mode respectively through locking, and adjusting and fixing;
s3, driving the first Larsen steel plate pile 2, the second Larsen steel plate pile 8, the two groups of locking steel plates 4 and the two groups of H-shaped steel 1 to a preset height through a pile driver, and lifting the enclosure structure 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 8, the two groups of locking steel plates 4 and the two groups of H-shaped steel 1 combined walls is finished;
s4, mounting an H-shaped steel purlin 7, carrying out support construction, excavating soil to the bottom of a pit, pouring a bottom plate basement structure, and backfilling the soil;
and S5, after the work in the step S4 is finished, the support structure of the enclosure structure is dismantled, and the LHW enclosure piles are pulled out.
In the embodiment, the enclosure form adopts the combination stress of the first Larsen steel sheet pile 2, the second Larsen steel sheet pile 8, the two groups of locking steel plates 4 and the H-shaped steel 1, no mud is generated in construction, static pressure pile sinking construction is adopted, construction is noiseless and pollution-free, and all materials can be recycled;
it should be noted that, during the use process, the embodiment can obtain the following specific effects:
1. h shaped steel 1 adopts L shape draw-in groove 3 to inlay solid with fore shaft steel sheet 4 to be connected, and fore shaft steel sheet 4 adopts stagnant water fore shaft with Larsen steel sheet pile 2 to be connected, and when using, the construction is simple and convenient, and the component is retrieved the convenience alone, and H shaped steel and Larsen steel sheet pile's turnover rate is high.
2. The H-shaped steel 1, the first Larsen steel plate pile 2, the second Larsen steel plate pile 8 and the locking steel plate 4 are all constructed by adopting a pile pressing machine in a static pressure manner, and the construction method has no noise and no mud pollution on site.
The gate type enclosure structure of the LHW construction method is suitable for soft soil and general non-hard soil layers, is combined with a corresponding support system, and is suitable for foundation pits with the excavation depth of 8 meters and more. Meanwhile, the construction machine occupies a small area, is single in machine and is suitable for construction in limited places.
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 (4)
1. A foundation pit enclosure form LHW construction method comprises an enclosure structure and a LHW construction method, and is characterized in that the enclosure structure comprises two groups of H-shaped steel (1), a first Larsen steel sheet pile (2), a second Larsen steel sheet pile (8), two groups of L-shaped steel clamping grooves (3), two groups of locking steel plates (4), a welding seam (5), an H-shaped steel connecting beam (6) and an H-shaped steel purlin (7), wherein two sides of the first Larsen steel sheet pile (2) and the second Larsen steel sheet pile (8) are respectively connected with the two groups of locking steel plates (4) in an occlusion mode, the two groups of L-shaped steel clamping grooves (3) are fixedly connected with one sides of the two groups of H-shaped steel (1), and the other sides of the two groups of H-shaped steel (1) are connected with the H-shaped steel connecting beam (6) in a welding mode to form;
the LHW construction method mainly comprises the following steps:
s1, measuring the paying-off leveling field, placing a positioning frame and adjusting the level.
S2, inserting a first Larsen steel plate pile (2), a second Larsen steel plate pile (8), two groups of H-shaped steel (1) and two groups of locking steel plates (4), and enabling the H-shaped steel (1) to be fixedly connected with one sides of the first Larsen steel plate pile (2) and the second Larsen steel plate pile (8) through two groups of L-shaped steel clamping grooves (3) in an embedded mode, wherein two sides of the first Larsen steel plate pile (2) and two sides of the second Larsen steel plate pile (8) are fixedly connected with the two groups of locking steel plates (4) in an engaged mode respectively and then are adjusted and fixed;
s3, driving the first Larsen steel plate pile (2), the second Larsen steel plate pile (8), the two groups of locking steel plates (4) and the two groups of H-shaped steel (1) to a preset height through a pile driver, and lifting the enclosure structure 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 (8), the two groups of locking steel plates (4) and the two groups of H-shaped steel (1) combined walls is finished;
s4, mounting an H-shaped steel purlin (7), carrying out support construction, and when carrying out soil excavation work, firstly excavating soil to the bottom of a pit, then pouring a bottom plate basement structure, and then backfilling the soil;
and S5, after the work in the step S4 is finished, the support structure of the enclosure structure is dismantled, and the LHW enclosure piles are pulled out.
2. The foundation pit enclosing form LHW construction method according to claim 1, wherein the first Larsen steel sheet pile (2) and the second Larsen steel sheet pile (8) are provided with adaptive locking notch grooves near two sides of the locking notch steel sheet (4) and one side of the two groups of locking notch steel sheets (4).
3. The foundation pit enclosing form LHW construction method according to claim 1, wherein two sets of L-shaped steel slots (3) are welded to two sets of locking steel plates (4), respectively.
4. The foundation pit enclosing form LHW construction method according to claim 1, wherein the heights of the first Larsen steel sheet pile (2), the second Larsen steel sheet pile (8), the two sets of H-shaped steel (1), the two sets of locking steel plates (4) and the two sets of L-shaped steel clamping grooves (3) are greater than the heights of the H-shaped steel purlin (7) and the H-shaped steel connecting beam (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110198219.7A CN112832257A (en) | 2021-02-22 | 2021-02-22 | Foundation pit enclosure type LHW construction method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110198219.7A CN112832257A (en) | 2021-02-22 | 2021-02-22 | Foundation pit enclosure type LHW construction method |
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| CN202110198219.7A Pending CN112832257A (en) | 2021-02-22 | 2021-02-22 | Foundation pit enclosure type LHW construction method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114508094A (en) * | 2022-02-21 | 2022-05-17 | 中冶华南建设工程有限公司 | Underground diaphragm wall structure of water-rich karst geology and construction method thereof |
| CN114934516A (en) * | 2022-04-29 | 2022-08-23 | 中国二十二冶集团有限公司 | Connecting device for joint positions of SMW construction method pile and Larsen steel sheet pile and construction method |
| 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 |
| WO2023077552A1 (en) * | 2021-11-08 | 2023-05-11 | 浙江乔兴建设集团有限公司 | Construction method for foundation pit enclosure and earth excavation |
-
2021
- 2021-02-22 CN CN202110198219.7A patent/CN112832257A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023077552A1 (en) * | 2021-11-08 | 2023-05-11 | 浙江乔兴建设集团有限公司 | Construction method for foundation pit enclosure and earth excavation |
| CN114508094A (en) * | 2022-02-21 | 2022-05-17 | 中冶华南建设工程有限公司 | Underground diaphragm wall structure of water-rich karst geology and construction method thereof |
| CN114934516A (en) * | 2022-04-29 | 2022-08-23 | 中国二十二冶集团有限公司 | Connecting device for joint positions of SMW construction method pile and Larsen steel sheet pile and construction method |
| 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 |
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