CN212801564U - Foundation ditch steel sheet pile supporting construction - Google Patents

Foundation ditch steel sheet pile supporting construction Download PDF

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Publication number
CN212801564U
CN212801564U CN202021556676.6U CN202021556676U CN212801564U CN 212801564 U CN212801564 U CN 212801564U CN 202021556676 U CN202021556676 U CN 202021556676U CN 212801564 U CN212801564 U CN 212801564U
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China
Prior art keywords
steel sheet
sheet pile
supporting
precast concrete
foundation pit
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CN202021556676.6U
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Chinese (zh)
Inventor
宋鹏辉
郭健
刘奇
游仁
杨家飞
杜华
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China MCC20 Group Corp Ltd
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China MCC20 Group Corp Ltd
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Abstract

The utility model relates to a foundation ditch steel sheet pile supporting construction, Larsen steel sheet pile including many mutual interlock connections, many Larsen steel sheet pile connects and is formed with at least four sides foundation ditch enclosure face, each the equal fixedly connected with precast concrete supporting beam in outside upper portion of foundation ditch enclosure face, adjacent two through a cast in situ concrete supporting beam fixed connection between the precast concrete supporting beam. The utility model provides a foundation ditch steel sheet pile supporting construction can form stable and firm support to the larsen steel sheet pile in the outside of larsen steel sheet pile, prevents to topple, improves the excavation supporting security, owing to be used for carrying out the outside at the foundation ditch enclosure face of precast concrete supporting beam and the setting of cast in situ concrete supporting beam that supports to the larsen steel sheet pile to construction machinery's work efficiency when can not influence the excavation of foundation ditch, can effectively shorten the time limit for a project of excavation.

Description

Foundation ditch steel sheet pile supporting construction
Technical Field
The utility model relates to a civil construction technical field, more specifically relates to a foundation ditch steel sheet pile supporting construction.
Background
When the foundation of the engineering structure is constructed, a foundation pit needs to be excavated, and necessary supporting is carried out on the foundation pit by adopting the steel sheet piles, so that the excavated foundation pit is prevented from landslide and overturning. The steel sheet pile is a green and environment-friendly steel member which can be repeatedly used, and is well applied to foundation pit support. In the engineering construction area that the soil property is silt matter clay, partial silt matter clay soft soil layer thickness can reach 40m, and the water permeability is poor, and has the plastic bottom distribution of flow, among the construction area deep basal pit support process, because silt matter foundation ditch edge variability, lead to the steel sheet pile wholeness relatively poor, reduce the antidumping nature coefficient, reduce steel sheet pile firmness, have certain potential safety hazard.
In a traditional foundation pit steel sheet pile supporting mode, a large number of enclosing purlins and inner supports are needed to ensure the integrity of a steel sheet pile supporting system, and a large amount of construction cost and construction period are increased; the inner supports and the enclosing purlins are arranged inside the enclosing protective surface of the steel sheet pile, the working efficiency of construction machinery during foundation pit excavation is seriously influenced, and the construction period of the foundation pit excavation is prolonged.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model aims at providing a foundation ditch steel sheet pile supporting construction for silt matter foundation ditch aims at solving the problem that exists among the prior art.
According to the utility model discloses, a foundation ditch steel sheet pile supporting construction is provided, Larsen steel sheet pile including many mutual interlock connections, many Larsen steel sheet pile connects and is formed with at least four sides foundation ditch enclosure face, each the equal fixedly connected with precast concrete supporting beam in outside upper portion of foundation ditch enclosure face, adjacent two through cast in situ concrete supporting beam fixed connection between the precast concrete supporting beam.
Preferably, the cast-in-place concrete support beam is of an arc-shaped structure, and the height and the width of the cast-in-place concrete support beam are respectively consistent with those of the precast concrete support beam.
Preferably, both end surfaces of the precast concrete support beam in the length direction are roughened surfaces.
Preferably, the top of each Larsen steel sheet pile near the outer side of the foundation pit in the foundation pit enclosure surface is respectively provided with a first connecting plate, one side of the precast concrete supporting beam is correspondingly provided with a plurality of second connecting plates, and the second connecting plates are matched and fixedly connected with the first connecting plates, so that the precast concrete supporting beam is fixedly connected onto the foundation pit enclosure surface.
Preferably, the second connecting plate is detachably connected to the first connecting plate.
Preferably, the first connecting plate and the second connecting plate are respectively and correspondingly provided with two bolt through holes, and the second connecting plate and the first connecting plate are fixedly connected through a bolt assembly.
Preferably, the upper surface of the first connecting plate is flush with the upper end face of the larsen steel sheet pile.
Preferably, the second connecting plate is disposed on an upper portion of one side of the precast concrete support beam.
Preferably, a steel reinforcement framework is arranged in the precast concrete supporting beam, and the end part of the second connecting plate is welded on the steel reinforcement framework.
Preferably, the height of the precast concrete supporting beam is 400mm to 600mm, and the width of the precast concrete supporting beam is 100mm to 200 mm.
The utility model provides a foundation ditch steel sheet pile supporting construction connects a precast concrete supporting beam through the outside upper portion of the foundation ditch enclosure face that forms at the larsen steel sheet pile to with adjacent two precast concrete supporting beams between through a cast in situ concrete supporting beam fixed connection, each precast concrete supporting beam and a cast in situ concrete supporting beam form integral type structure, thereby form stable and firm support in the outside of larsen steel sheet pile to the larsen steel sheet pile, prevent to topple, improve the excavation supporting security. Because the precast concrete supporting beam and the cast-in-place concrete supporting beam for supporting the Larsen steel sheet pile are arranged outside the foundation pit enclosure surface, the working efficiency of construction machinery during foundation pit excavation cannot be influenced, and the construction period of the foundation pit excavation can be effectively shortened. Because the precast concrete supporting beam of the concrete structure is adopted and the transverse or oblique supporting rod is not needed for supporting, the construction cost is greatly reduced.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent from the following description of the embodiments of the present invention with reference to the accompanying drawings.
Fig. 1 shows according to the utility model discloses foundation ditch steel sheet pile supporting construction's spatial structure schematic diagram.
Fig. 2 is a partial enlarged view at a in fig. 1.
Fig. 3 shows schematic plan view of foundation pit steel sheet pile supporting structure according to the embodiment of the utility model.
Fig. 4 shows according to the utility model discloses a structural schematic of larsen steel sheet pile among foundation ditch steel sheet pile supporting construction.
Fig. 5 shows according to the utility model discloses a precast concrete supporting beam's local structure schematic in foundation ditch steel sheet pile supporting construction.
Fig. 6 shows according to the utility model discloses a schematic diagram of foundation ditch steel sheet pile supporting construction when the enclosure foundation ditch.
In the figure: larsen steel sheet pile 1, first connecting plate 11, precast concrete supporting beam 2, second connecting plate 21, cast in situ concrete supporting beam 3, bolt assembly 4, foundation ditch 5.
Detailed Description
Various embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Like elements in the various figures are denoted by the same or similar reference numerals. For purposes of clarity, the various features in the drawings are not necessarily drawn to scale.
Referring to fig. 1 to 3, the utility model provides a foundation ditch steel sheet pile supporting construction for silt matter foundation ditch, including the Larsen steel sheet pile 1 that many mutual interlocks are connected, many Larsen steel sheet piles 1 are connected and are formed with at least four sides foundation ditch surrounding surface, each the equal fixedly connected with precast concrete supporting beam 2 in outside upper portion of foundation ditch surrounding surface, through cast in situ concrete supporting beam 3 fixed connection between two adjacent precast concrete supporting beam 2.
The Larsen steel sheet piles are also called U-shaped steel sheet piles, the cross sections of the Larsen steel sheet piles are in U-shaped structures, U-shaped bent parts are arranged on the edges of two sides of each Larsen steel sheet pile, adjacent Larsen steel sheet piles are mutually buckled, lapped and occluded through the U-shaped bent parts to be fixedly connected, and a plurality of Larsen steel sheet piles are combined to form a continuous and compact enclosing surface of a soil or water retaining wall. When two adjacent Larsen steel sheet piles 1 are mutually occluded, the openings of the two Larsen steel sheet piles 1 face opposite directions, and are occluded and connected through U-shaped bent parts at the edges of the two Larsen steel sheet piles. In the embodiment, the plurality of Larsen steel sheet piles 1 are connected to form a four-side foundation pit enclosure surface, and the four-side foundation pit enclosure surface is connected end to form a rectangular structure for enclosing the periphery of the foundation pit, supporting the foundation pit and ensuring the safety of underground structure construction and the surrounding environment of the foundation pit. In other alternative embodiments, a plurality of larsen steel sheet piles 1 may be connected to form a foundation pit enclosure surface with more than four sides according to the situation of a construction site. It should be noted that, in each foundation pit surrounding surface, a plurality of larsen steel sheet piles 1 are sequentially connected in a straight line to form the surrounding surface, that is, each larsen steel sheet pile near the outer side of the foundation pit is located in the same plane, and each larsen steel sheet pile 1 near the inner side of the foundation pit is located in the same plane, so as to ensure that the precast concrete supporting beam 2 can be fixedly connected with the foundation pit surrounding surface.
Precast concrete supporting beam 2 with the fixed mode on the outside upper portion of foundation ditch enclosure surface is detachable connection, in this embodiment the top that is close to each Larsen steel sheet pile 1 in the foundation ditch enclosure surface outside the foundation ditch is equipped with first connecting plate 11 respectively, corresponds at a side of precast concrete supporting beam 2 and is provided with a plurality of second connecting plates 21, second connecting plate 21 and first connecting plate 11 cooperation fixed connection to with precast concrete supporting beam 2 fixed connection in on the foundation ditch enclosure surface. Referring to fig. 4, the first connecting plate 11 is made of a steel plate with a certain thickness, the thickness of the steel plate meets the strength requirement, the shape of the first connecting plate 11 is matched with the shape of the U-shaped opening of the larsen steel plate pile 1, the upper surface of the first connecting plate 11 is flush with the upper end face of the larsen steel plate pile 1, and the first connecting plate 11 is fixedly connected with the larsen steel plate pile 1 through a welding mode. Referring to fig. 5, the cross section of the precast concrete supporting beam 2 is rectangular, a steel reinforcement framework is arranged inside the precast concrete supporting beam to enhance the structural strength of the precast concrete supporting beam, the second connecting plate 21 is arranged on the upper portion of one side face of the precast concrete supporting beam 2, when the precast concrete supporting beam 2 is manufactured, the end portion of the second connecting plate 21 is fixedly connected onto the steel reinforcement framework in a welding mode, then concrete is poured, the second connecting plate 21 is made of a rectangular steel plate, and the thickness of the second connecting plate meets the requirement of the supporting strength. Two bolt through holes are correspondingly arranged on the first connecting plate 11 and the second connecting plate 21 respectively, and the second connecting plate 21 and the first connecting plate 11 are fixedly connected through a bolt assembly 4. The precast concrete supporting beam 2 can be precast and processed in a factory, the precast concrete supporting beam 2 meeting the length requirement is designed according to the size of a foundation pit and the number of steel sheet piles of a foundation pit enclosing surface, the distance between two adjacent second connecting plates 21 on the precast concrete supporting beam 2 is consistent with the distance between two adjacent first connecting plates 11 on the foundation pit enclosing surface, bolt through holes in the first connecting plates 11 or the second connecting plates 21 can be set to be long round holes, and the problem that bolt assembling difficulty is caused because the bolt through holes in the first connecting plates 11 and the second connecting plates 21 cannot be aligned due to processing errors is solved.
The cast-in-place concrete support beam 3 is formed in a site after the precast concrete support beam 2 is installed on the foundation pit enclosure surface, in the embodiment, the cast-in-place concrete support beam 3 is of an arc-shaped structure, and the height and the width of the cast-in-place concrete support beam 3 are respectively consistent with those of the precast concrete support beam 2. The height of the precast concrete support beam 2 is 400mm-600mm, the width of the precast concrete support beam 2 is 100mm-200mm, in the embodiment, the height of the precast concrete support beam 2 and the cast-in-place concrete support beam 3 are both 500mm, and the width is both 150 mm. Two end faces of the precast concrete supporting beam 2 in the length direction are chiseled surfaces, so that the precast concrete supporting beam and the cast-in-place concrete supporting beam 3 have good binding force. Be equipped with the reinforcing bar in the cast in situ concrete supporting beam 3 and increase its structural strength, the reinforcing bar is bent into the arc shape, and the both ends of reinforcing bar can be implanted in the terminal surface of two adjacent precast concrete supporting beams 2, and after precast concrete supporting beam 2 installation was accomplished, prop up between two adjacent precast concrete supporting beams 2 and establish the template, thereby carry out cast in situ concrete supporting beam 3, with two adjacent precast concrete supporting beam 2 fixed connection together.
As shown in fig. 6, which is a schematic view of the foundation pit steel sheet pile supporting structure of this embodiment when enclosing a foundation pit, in a specific construction, a larsen steel sheet pile 1 is driven into an edge of a foundation pit 5, and a plurality of larsen steel sheet piles 1 are engaged and connected in sequence to form a four-sided foundation pit enclosure surface. The first connecting plate 11 at the top of the Larsen steel sheet pile 1 can be welded before the Larsen steel sheet pile is used, and can also be welded on site after the Larsen steel sheet pile 1 is driven into the edge of the foundation pit 5 to form a foundation pit enclosure surface. And (3) connecting the precast concrete supporting beam 2 on the upper part of the formed foundation pit enclosure surface, and fastening and connecting the second connecting plate 21 of the precast concrete supporting beam 2 and the first connecting plate 11 at the top of the Larsen steel sheet pile 1 by using the high-strength bolt assembly 4 during specific connection. And after the precast concrete supporting beams 2 on the foundation pit enclosure surface are connected, erecting a mould to pour in situ to form a cast-in-place concrete supporting beam 3, removing the mould when the maintenance is completed and the strength requirement is met, and forming a foundation pit steel sheet pile supporting structure. As can be seen from fig. 6, due to the closed support structure formed by connecting the precast concrete support beam 2 and the cast-in-place concrete support beam 3, the larsen steel sheet pile 1 at the edge of the foundation pit can be effectively supported to prevent overturning.
The utility model discloses compare in traditional foundation ditch steel sheet pile supporting construction, have following advantage at least:
1. the prefabricated concrete support beam and the cast-in-place concrete support beam of the concrete structure are connected to the upper part of the outer side of the steel sheet pile, so that the use of purlin enclosing materials is reduced, an inner support structure is not needed, and the construction cost is reduced;
2. the precast concrete supporting beam and the cast-in-place concrete supporting beam are arranged outside the foundation pit, so that the working efficiency of construction machinery during foundation pit excavation cannot be influenced, and the construction period of the foundation pit excavation can be effectively shortened.
3. The precast concrete supporting beam and the Larsen steel sheet pile are detachably connected, and after the precast concrete supporting beam is used, the main body part of the precast concrete supporting beam can be reused, so that the construction cost is further reduced.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Finally, it should be noted that: it should be understood that the above examples are only for clearly illustrating the present invention and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious changes and modifications may be made without departing from the scope of the present invention.

Claims (10)

1. The utility model provides a foundation ditch steel sheet pile supporting construction, its characterized in that includes many mutual interlock connection's Larsen steel sheet pile, many Larsen steel sheet pile connects and is formed with at least four sides foundation ditch surrounding surface, each the equal fixedly connected with a precast concrete supporting beam in outside upper portion of foundation ditch surrounding surface, adjacent two through cast in situ concrete supporting beam fixed connection between the precast concrete supporting beam.
2. The foundation pit steel sheet pile supporting structure according to claim 1, wherein the cast-in-place concrete supporting beam has a circular arc-shaped structure, and the height and the width of the cast-in-place concrete supporting beam are respectively identical to those of the precast concrete supporting beam.
3. The foundation pit steel sheet pile support structure according to claim 2, wherein both end surfaces in the longitudinal direction of the precast concrete support beam are roughened surfaces.
4. The foundation pit steel sheet pile supporting structure according to claim 1, wherein a first connecting plate is respectively arranged at the top of each Larsen steel sheet pile close to the outer side of the foundation pit in the foundation pit enclosure surface, a plurality of second connecting plates are correspondingly arranged on one side surface of the precast concrete supporting beam, and the second connecting plates are matched and fixedly connected with the first connecting plates, so that the precast concrete supporting beam is fixedly connected to the foundation pit enclosure surface.
5. The foundation pit steel sheet pile supporting structure according to claim 4, wherein the second connecting plate is detachably connected to the first connecting plate.
6. The foundation pit steel sheet pile supporting structure according to claim 5, wherein two bolt through holes are correspondingly formed in the first connecting plate and the second connecting plate respectively, and the second connecting plate and the first connecting plate are fixedly connected through a bolt assembly.
7. The foundation pit steel sheet pile support structure according to claim 4, wherein an upper surface of the first connection plate is flush with an upper end surface of the Larsen steel sheet pile.
8. The foundation pit steel sheet pile supporting construction according to claim 4, wherein the second connecting plate is provided on an upper portion of one side surface of the precast concrete support beam.
9. The foundation pit steel sheet pile supporting structure according to claim 8, wherein a steel reinforcement framework is provided in the precast concrete support beam, and an end of the second connecting plate is welded to the steel reinforcement framework.
10. The foundation pit steel sheet pile supporting structure according to claim 1, wherein the precast concrete supporting beam has a height of 400mm to 600mm and a width of 100mm to 200 mm.
CN202021556676.6U 2020-07-30 2020-07-30 Foundation ditch steel sheet pile supporting construction Active CN212801564U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202021556676.6U CN212801564U (en) 2020-07-30 2020-07-30 Foundation ditch steel sheet pile supporting construction

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202021556676.6U CN212801564U (en) 2020-07-30 2020-07-30 Foundation ditch steel sheet pile supporting construction

Publications (1)

Publication Number Publication Date
CN212801564U true CN212801564U (en) 2021-03-26

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Application Number Title Priority Date Filing Date
CN202021556676.6U Active CN212801564U (en) 2020-07-30 2020-07-30 Foundation ditch steel sheet pile supporting construction

Country Status (1)

Country Link
CN (1) CN212801564U (en)

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