CN218813752U

CN218813752U - Double-row pile foundation pit supporting structure adopting inclined pedestal piles

Info

Publication number: CN218813752U
Application number: CN202223139865.5U
Authority: CN
Inventors: 王文东; 刘小文
Original assignee: Nanchang University
Current assignee: Nanchang University
Priority date: 2022-11-25
Filing date: 2022-11-25
Publication date: 2023-04-07
Anticipated expiration: 2032-11-25

Abstract

The utility model discloses an adopt double row pile foundation ditch supporting construction of slope club-footed pile, including front row fender pile, back row fender pile and tie beam, front row fender pile sets up in the front portion of foundation ditch, back row fender pile sets up in the rear portion of foundation ditch, front row fender pile, back row fender pile are connected through the tie beam, and the one end of tie beam is articulated with the top of front row fender pile, and the other end of tie beam is arranged in the position that back row fender pile middle part is on the upper side, front row fender pile and back row fender pile are the contained angle and arrange, the bottom of front row fender pile is equipped with the club-footed pile; the utility model discloses an improve the operation mode that the foundation ditch was squeezed into to the stake and improve the structure of stake on original double pile basis, the contained angle of row fender pile forms more stable fender structure and consolidates the former row fender pile around increasing to reduced that existing double row pile is subsided because of the too big displacement that leads to of atress, avoided keeping off the unstable side slope that leads to and subside.

Description

Double-row pile foundation pit supporting structure adopting inclined pedestal piles

Technical Field

The utility model relates to a excavation supporting model experiment field especially relates to an adopt double row pile excavation supporting construction of slope club-footed pile.

Background

With the development of the building industry in the 21 st century, engineers face a lot of engineering problems in the building construction process, such as collapse of earthwork easily along with the change of time and force during foundation excavation, so that engineering operation cannot be performed orderly, and a large amount of manpower, material resources and financial resources are consumed. At present, many side slope supporting modes have been researched for solving the problem of side slope collapse, wherein the side slope supporting modes comprise double-row piles, the double-row piles are used as concrete structures, like portal frames embedded into soil, the stability of an engineering structure can be enhanced, the construction is convenient, the lateral deformation of a foundation pit can be effectively controlled, the bending moment of a pile body can be reduced, the influence of foundation pit excavation engineering on the surrounding environment can be reduced, and the side slope supporting mode is widely used in the aspect of foundation pit support. However, in actual engineering, the double rows of piles are used as assembly components, the supporting and blocking effect on the foundation pit is affected by the size of the foundation pit, and the supporting force is limited. For some large-scale landslides in engineering practice, due to the fact that the downward sliding force or the potential downward sliding force is large, double rows of piles may need to be arranged for supporting and blocking, the row pile supports have large lateral rigidity, and deformation of a supporting structure can be effectively limited. However, because the front row of support piles in the double rows of piles vertically penetrate into the foundation, the actual overturning force on the soil body above the foundation pit is larger than that on the soil body below the foundation pit, so that the vertical piles are easy to topple, and the effect of supporting and blocking the foundation pit cannot be achieved. Meanwhile, because the current soil body resources are short, the retaining effect of the existing front-row inclined pedestal pile on the foundation pit is limited by the site, the size of the foundation pit, the foundation and the like, and the requirement of foundation pit support cannot be met.

Based on the reason, the utility model designs an adopt double row pile underground structure of slope club-footed pile, the fender dynamics of increase double row pile is in order to reduce the risk of foundation ditch collapsing.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an adopt double row pile underground structure of slope club-footed pile through improving double row pile to realize under the restricted condition in place, when increasing the fender dynamics of double row pile, with the performance that reduces the risk of foundation ditch collapse.

In order to realize the utility model discloses a purpose, the utility model discloses a technical scheme do:

the utility model discloses an adopt double row pile underground structure of slope club-footed pile, including front-seat fender pile, back row fender pile and tie beam, front-seat fender pile sets up in the front portion of foundation ditch, back row fender pile sets up in the rear portion of foundation ditch, front-seat fender pile, back row fender pile pass through the tie beam and connect, and the one end of tie beam is articulated with the top of front-seat fender pile, and the other end of tie beam arranges back-seat fender pile middle part position on the upper side in, front-seat fender pile and back-seat fender pile are the contained angle and arrange, and expand the end to the bottom of front-seat fender pile.

The whole section structure of the pedestal pile is fan-shaped, the slope of the side surface of the pedestal pile is 0.33-0.5, and the rise of the bottom surface of the pedestal pile is 0.1-0.15 times of the diameter of the pile end.

The front row of support piles and the rear row of support piles are of concrete structures, and the connecting beams are of steel structures.

The utility model has the advantages that:

the utility model solves the problems that the prior device causes uneven stress of the foundation pit and unstable supporting structure; the operation mode of driving piles into a foundation pit and the structure of the piles are improved on the basis of the original double-row piles, the included angle between the front row of support piles and the rear row of support piles is increased to form a more stable support structure and reinforce the front row of support piles, so that the displacement settlement caused by over-large stress of the existing double-row piles is reduced, and the side slope collapse caused by unstable support is avoided; the double-row pile is a precast pile, the connecting beam is a steel beam, the prefabricated pile is of an assembled structure, construction is convenient, combination is tight, the structure is more stable, and the purpose of engineering safety and economy is achieved.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic view of the club-footed pile structure of the present invention.

In the figure: 1. front row supporting piles, 2 rear row supporting piles, 3 connecting beams and 4 club-footed piles.

Detailed Description

The technical solution of the present invention is further specifically described below by way of example, with reference to fig. 1-2.

The utility model discloses an adopt double row pile foundation ditch supporting construction of slope club-footed pile, including front-seat fender pile 1, back row fender pile 2 and tie beam 3, front-seat fender pile 1 sets up in the front portion of foundation ditch, back row fender pile 2 sets up in the rear portion of foundation ditch, front-seat fender pile 1, back row fender pile 2 are connected through tie beam 3, and the one end of tie beam 3 is articulated with the top of front-seat fender pile 1, and the other end of tie beam 3 is arranged in the position on the upper side in back row fender pile 2 middle part, front-seat fender pile 1 and back row fender pile 2 are the contained angle and are arranged, the bottom of front-seat fender pile 1 is equipped with club-footed pile 4, the utility model discloses the double row pile material of atress is concrete, and tie beam 3 material is steel, and tie beam 3 makes the rear portion atress of back row fender pile more even fender pile on the upper side with the connecting position middle part of back row fender pile 2; the back row fender pile in the double row pile is squeezed into the foundation ditch with the same vertically of traditional double row pile construction method, front row fender pile 1 improves the form for club-footed pile 4 and uses the top as the initial point and outwards rotates a small-angle and squeeze into the foundation ditch for the initial point in the pile bottom, the angle is tentatively decided to 5, the operation place scope decision of actual engineering is looked at to concrete inclination, front row fender pile 1 after expanding the end promptly is the contained angle with back row fender pile 2 and arranges, the structure is more stable, reduce the lateral deformation of foundation ditch, pile body horizontal displacement has also received certain restriction simultaneously, be difficult for collapsing.

The diameter ratio of the diameter of the pedestal pile 4 to the pile body is determined according to the requirement of bearing capacity and the holding capacity of the bottom soil body, the maximum diameter cannot exceed 3, the overall section structure of the pedestal pile 4 is fan-shaped, the slope of the side surface of the pedestal pile 4 is 0.33-0.5, and the rise of the bottom surface of the pedestal pile 4 is 0.1-0.15 times of the diameter of the pile end.

The front row supporting piles 1 and the rear row supporting piles 2 are of concrete structures, and the connecting beams 3 are of steel structures; the front row of support piles and the rear row of support piles are prefabricated on site and are immediately driven into a foundation pit, and the connecting beam 3 between the front row of support piles 1 and the rear row of support piles 2 of the expanded bottom is a steel beam, is hinged, is more tightly combined with piles, has better bending resistance, has more stable structure and is convenient to construct.

The inclined angle of the front row support piles 1 is not too large, otherwise, the construction operation range of the basement is affected, the front row support piles 1 are obliquely driven into the foundation pit on the basis that the construction red line operation is not exceeded, the support and blocking strength is improved, and the risk of foundation pit overturning is reduced.

The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims

1. The utility model provides an adopt double row pile underground structure of slope club-footed pile which characterized in that: including front row fender pile (1), back row fender pile (2) and tie beam (3), front row fender pile (1) sets up in the front portion of foundation ditch, back row fender pile (2) set up in the rear portion of foundation ditch, front row fender pile (1), back row fender pile (2) are connected through tie beam (3), and the one end of tie beam (3) is articulated with the top of front row fender pile (1), and the other end of tie beam (3) is arranged in back row fender pile (2) middle part position on the upper side, front row fender pile (1) is the contained angle with back row fender pile (2) and is arranged, and the bottom of front row fender pile (1) is equipped with club-footed pile (4).

2. The double row pile foundation pit supporting structure using the inclined pedestal pile according to claim 1, wherein: the overall section structure of the club-footed pile (4) is fan-shaped, the slope of the side surface of the club-footed pile (4) is 0.33 to 0.5, and the rise of the bottom surface of the club-footed pile (4) is 0.1 to 0.15 times of the diameter of the pile end.

3. The double-row pile foundation pit supporting structure adopting the inclined club-footed pile as claimed in claim 1, which is characterized in that: the front row supporting piles (1) and the rear row supporting piles (2) are of concrete structures, and the connecting beams (3) are of steel structures.