Foundation pit supporting structure with buttress column combined with steel sheet pile

Abstract

The utility model discloses a foundation pit supporting structure with a buttress combined with a steel sheet pile, and belongs to the technical field of foundation pit supporting. Comprising a steel sheet pile structure defined by a plurality of steel sheet piles, a transversely-arranged top connecting beam fixed to the tops of the steel sheet piles, buttress columns arranged on the inner side of the top connecting beam and vertically arranged at intervals, and bottom limiting bodies arranged at the bottom of a foundation pit and located between the steel sheet piles and the buttress columns. The buttress combined steel sheet pile foundation pit supporting structure forms an integral structure through the top connecting beam and the bottom limiting body, is high in rigidity, adapts to internal force distribution of the structure, and can effectively control deformation of the side wall of a foundation pit. Meanwhile, a traditional steel sheet pile inner supporting structure can be replaced within a certain range, a working space is provided for construction of an internal main body structure, and the construction efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of foundation pit support, especially a kind of supporting column combined steel sheet pile foundation pit support structure. BACKGROUND

[0002] As conventional Larsen steel sheet pile is used as foundation pit support structure, the structure of steel sheet pile is provided with lock, and after being driven, it is connected and engaged by lock, to form continuous steel sheet pile structure, with the function of water stop and support, and according to different models of steel sheet pile, it can be applied to foundation pit with depth not more than 8m, but because Larsen steel sheet pile is plate structure, its thickness is small, so overall rigidity is small, and it is often used with internal support or anchor cable, to occupy internal construction space or space outside red line, resulting in low construction efficiency and difficult construction coordination.

[0003] In soft soil area foundation pit, because supporting structure needs to bear large water and soil pressure, conventional cantilever steel sheet pile cannot meet deformation and stress requirements, so there is an urgent need for a kind of foundation pit support structure, which can effectively control the deformation of foundation pit side wall. INVENTION CONTENTS

[0004] The utility model aims at providing a kind of supporting column combined steel sheet pile foundation pit support structure, and supporting column combined steel sheet pile foundation pit support structure is formed by top beam, bottom limiting body and steel sheet pile I-beam, with large rigidity, adaptive structure internal force distribution, and can effectively control the deformation of foundation pit side wall.

[0005] To achieve the above-mentioned purpose, the technical scheme adopted by the utility model is as follows:

[0006] A kind of supporting column combined steel sheet pile foundation pit support structure, including the steel sheet pile structure surrounded by several steel sheet piles, the top beam fixed in the top of steel sheet pile and arranged transversely, the supporting column arranged vertically and spaced in the inner side of top beam, and the bottom limiting body arranged at the bottom of foundation pit between steel sheet pile and supporting column.

[0007] The further improvement of the technical scheme of the utility model is that the top beam is fixedly connected with outer steel sheet pile structure by bolt or triangular bracket, the supporting column is made of I-beam or seamless steel pipe, and the supporting column is arranged at the position corresponding to the web plate of steel sheet pile structure.

[0008] The further improvement of the technical scheme of the utility model is that the top beam is double-spliced I-beam or HW steel.

[0009] The further improvement of the technical scheme of the utility model is that the bottom limiting body connects the bottom of steel sheet pile transversely as a whole, the width of bottom limiting body made of concrete pouring is consistent with the top beam, and the height is 400-500mm.

[0010] The further improvement in the technical scheme of the utility model lies in that the steel sheet piles are connected and engaged with each other through the lock buckles to form a continuous steel sheet pile structure.

[0011] The further improvement in the technical scheme of the utility model lies in that the steel sheet pile and the top beam are fixedly connected at the web position of the steel sheet pile.

[0012] The further improvement in the technical scheme of the utility model lies in that the number of the buttress columns is 1 / 4 or 1 / 2 of the number of the steel sheet piles, and the buttress columns are arranged at equal intervals.

[0013] Thanks to the above technical scheme, the utility model has the following technical progress:

[0014] The buttress column combined steel sheet pile foundation pit supporting structure of the utility model forms an integral structure through the top beam and the bottom limiting body, has large rigidity, adapts to internal force distribution of the structure, and can effectively control deformation of the side wall of the foundation pit. Meanwhile, the buttress column combined steel sheet pile foundation pit supporting structure can replace the traditional steel sheet pile internal supporting structure in a certain range to provide a working space for construction of the internal main structure and improve construction efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0015] Fig. 1 is a top view of the buttress column combined steel sheet pile foundation pit supporting structure of the utility model;

[0016] Fig. 2 is a schematic view of the steel sheet pile, the bottom limiting body and the I-beam structure of the buttress column combined steel sheet pile foundation pit supporting structure of the utility model;

[0017] Fig. 3 is a side view of the buttress column combined steel sheet pile foundation pit supporting structure of the utility model;

[0018] 1, steel sheet pile, 2, top beam, 3, bottom limiting body, 4, buttress column, 5, bolt. DETAILED DESCRIPTION

[0019] The utility model will be further described in detail in combination with the embodiments as follows:

[0020] For example, Figs. 1-3As shown, the utility model provides a kind of buttress column combined steel sheet pile foundation pit support structure for foundation pit support, including steel sheet pile 1, top beam 2, bottom limiting body 3 and buttress column 4, steel sheet pile 1 is connected by lock catch interlock, and continuous steel sheet pile structure is formed, steel sheet pile structure is located outermost, middle part is top beam 2, inside is buttress column 4, steel sheet pile 1 at foundation pit bottom and buttress column 4 middle part is bottom limiting body 3;Outer side steel sheet pile 1 adopts small lock catch and is punched into form, buttress column 4 is vertically spaced arrangement, position back leans steel sheet pile web;Top beam 2 of being arranged at the top of steel sheet pile 1 and steel sheet pile 1 adopt bolt connection or triangular bracket welding fixed, and top beam 2 can be connected as a whole to steel sheet pile structure transversely, provide structure top lateral stiffness, effectively coordinate foundation pit top internal force deformation;Bottom limiting body 3 between bottom steel sheet pile 1 and buttress column 4 adopts concrete pouring, and steel sheet pile structure can be connected as a whole transversely, provide structure bottom lateral stiffness, and can effectively limit foundation pit bottom deformation.The width of bottom limiting body 3 of concrete pouring that steel sheet pile 1 bottom is connected as a whole transversely is consistent with top beam 2, and height is 400~500mm.

[0021] Top beam 2 can select double-spliced I-beam or HW steel, and is arranged transversely.The buttress column 4 adopts I-beam or steel pipe, which can further strengthen the structural stiffness and limit deformation.The buttress column combined steel sheet pile foundation pit support structure can be removed and recycled after backfilling of the foundation pit.

[0022] The buttress column combined steel sheet pile foundation pit support structure forms a composite support structure, has large overall stiffness, can effectively control the displacement of the bottom and top of the foundation pit, is conducive to protecting the surrounding environment, can replace the traditional steel sheet pile inner support structure in a certain range, provides a working space for the construction of the internal main structure, and improves the construction efficiency.

[0023] Use method:

[0024] In the construction of the buttress column combined steel sheet pile foundation pit support structure for foundation pit support, first, the steel sheet pile 1 is driven, after driving, the top beam 2 is installed in the trench, and the top beam 2 and the steel sheet pile 1 are fixed by bolts, the buttress column 4 is driven close to the top beam 2, the buttress column 4 can adopt I-beam, the spacing between the buttress columns 4 is an even multiple of the width of the steel sheet pile 1, that is, the spacing between the buttress columns 4 is an even multiple of the width of the steel sheet pile 1, generally 2 or 4 times, to ensure that the positions correspond to the steel sheet pile web, then the foundation pit is excavated step by step, after the foundation pit is excavated to the base elevation, the bottom limiting body 3 between the I-beam and the steel sheet pile is poured with quick-setting C25 concrete, the height is 400~500mm, and the combined steel sheet pile support system is formed.

Claims

1. A buttress column combined steel sheet pile foundation pit support structure, characterized by: The invention comprises a steel sheet pile structure formed by a plurality of steel sheet piles (1), a transversely arranged top connecting beam (2) fixed on the top of the steel sheet piles (1), vertically spaced buttress columns (4) arranged inside the top connecting beam (2), and a bottom limiting body (3) arranged at the bottom of the foundation pit and located between the steel sheet piles (1) and the buttress columns (4).

2. The buttress column combined steel sheet pile foundation pit support structure according to claim 1, characterized in that: The top connecting beam (2) is fixedly connected to the outer steel sheet pile structure by bolts (5) or triangular brackets. The buttress columns (4) are made of either I-beams or seamless steel pipes. The buttress columns (4) are arranged corresponding to the positions of the webs of the steel sheet piles (1) of the steel sheet pile structure.

3. The buttress column combined steel sheet pile foundation pit support structure according to claim 2, characterized in that: The top connecting beam (2) is a double-jointed I-shaped steel or HW-shaped steel.

4. The buttress column combined steel sheet pile foundation pit support structure according to claim 1, characterized in that: The bottom limiter (3) connects the bottom of the steel sheet pile (1) transversely to form a whole. The bottom limiter (3) cast in concrete has a width consistent with the top connecting beam (2) and a height of 400-500 mm.

5. The buttress column combined steel sheet pile foundation pit support structure according to claim 1, characterized in that: The steel sheet piles (1) are connected and engaged with each other through locking buckles to form a continuous steel sheet pile structure.

6. The buttress column combined steel sheet pile foundation pit support structure according to claim 3, characterized in that: The steel sheet pile (1) and the top connecting beam (2) are fixedly connected at the web position of the steel sheet pile (1).

7. The buttress column combined steel sheet pile foundation pit support structure according to claim 2, characterized in that: The number of buttress columns (4) is 1 / 4 or 1 / 2 of the number of steel sheet piles (1), and the buttress columns (4) are arranged at equal intervals.

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