CN221052617U

CN221052617U - Double-row chair-shaped pile supporting structure

Info

Publication number: CN221052617U
Application number: CN202323064601.2U
Authority: CN
Inventors: 吴钰梁; 胡仕明; 匡文壮; 骆顺天
Original assignee: Wuhan Chengyuan Municipal Engineering Design Co ltd
Current assignee: Wuhan Chengyuan Municipal Engineering Design Co ltd
Priority date: 2023-11-10
Filing date: 2023-11-10
Publication date: 2024-05-31
Anticipated expiration: 2033-11-10

Abstract

The utility model belongs to the technical field of foundation pit engineering construction, and particularly relates to a double-row chair-shaped pile supporting structure. The front row piles and the rear row piles are arranged in the foundation in a drilling and pouring mode; the top ends of the front row piles and the rear row piles are respectively provided with an integrated front row pile crown beam and a rear row pile crown beam, and the height difference of 60-70cm is kept between the front row piles and the rear row piles; the front end of the rear row of piles is provided with an integrated enclosing purlin, and the enclosing purlin is horizontally connected with the front row of piles crown beam through a connecting beam to realize the connection of the front row of piles and the rear row of piles; and a soil retaining plate is arranged between the rear row piles, and a plain concrete cushion layer is arranged at the bottom of the soil retaining plate. When the height difference between the inside and outside of the site is large, the foundation pit can be maintained to be safe and stable, and the foundation pit can be used as a permanent anti-slip facility, so that the safety and stability of crowded side slopes after construction is finished are ensured.

Description

Double-row chair-shaped pile supporting structure

Technical Field

The utility model belongs to the technical field of foundation pit engineering construction, and particularly relates to a double-row chair-shaped pile supporting structure.

Background

The double-row piles have large space rigidity and strong adjustability, are suitable for complicated and changeable site conditions, are a common supporting mode for deep foundation pits, and the supporting structure comprises front row piles, rear row piles and connecting beams for connecting the front row piles and the rear row piles, and the action mechanism mainly exerts space effect through the connecting beams and works cooperatively with pile soil to support unbalanced soil pressure caused by excavation of the foundation pit, so that the stability of pit walls is maintained, deformation is controlled, and the requirements of construction and adjacent environmental safety are met. At present, the chair type double-row pile is innovatively developed on the basis of the gate type double-row pile, the pile top of the front row pile is lower than that of the rear row pile, and the front row pile and the rear row pile are connected through a connecting beam, so that the engineering cost of supporting piles can be reduced. If the geological conditions are complex and the topography fluctuation around the foundation pit is large, the topography fluctuation is large, and the height difference exists between the inside and the outside of the site after the construction is completed, permanent anti-slip measures are also needed to be considered. The construction method is that firstly, foundation pit supporting measures of slope laying and double-row piles are adopted, and after basement construction is completed, permanent retaining walls are arranged on tops of the supporting piles. Although the common construction solving measures can meet the requirements of foundation pit support and permanent anti-slip, when the site is not wide, no slope placing space exists, the working procedures cannot be smoothly implemented, the utility of support facilities is not fully utilized, and the cost of the permanent anti-slip facilities is increased.

Disclosure of utility model

To solve the defects and the shortages of the prior art; the utility model aims to provide a double-row chair-shaped pile supporting structure which is simple in structure, reasonable in design and convenient to use, can maintain safety and stability of a foundation pit when the height difference between the inside and the outside of a site is large, can serve as a permanent anti-slip facility, and ensures safety and stability of crowded side slopes after construction is completed.

In order to achieve the above purpose, the utility model adopts the following technical scheme: the pile comprises a front row of piles, a rear row of piles, a front row of pile crown beams, a rear row of pile crown beams, a connecting beam, an enclosing purlin, a soil retaining plate and a plain concrete cushion layer; the front row piles and the rear row piles are arranged in the foundation in a drilling and pouring mode; the top ends of the front row piles and the rear row piles are respectively provided with an integrated front row pile crown beam and a rear row pile crown beam, and the height difference of 60-70cm is kept between the front row piles and the rear row piles; the front end of the rear row of piles is provided with an integrated enclosing purlin, and the enclosing purlin is horizontally connected with the front row of piles crown beam through a connecting beam to realize the connection of the front row of piles and the rear row of piles; and a soil retaining plate is arranged between the rear row piles, and a plain concrete cushion layer is arranged at the bottom of the soil retaining plate.

Preferably, the soil retaining plate is arranged on the front side of the rear pile row axis of the rear pile row, and the soil retaining plate is connected with the rear pile row through the cooperation pouring of the rear implanted anchoring steel bars.

Preferably, the inside of retaining board be provided with by stirrup and vertical reinforcing bar constitution steel bar fossil fragments, and steel bar fossil fragments's centre inside is provided with the straight lacing wire, steel bar fossil fragments's centre has still cup jointed the stiffening stirrup of U type.

Preferably, the front end of the pile main rib inside the rear row of piles is welded with an enclosing purlin hanging rib, the tail end of the enclosing purlin hanging rib is bent to form an enclosing purlin keel, the rear end of the enclosing purlin is provided with an enclosing purlin bar planting, and the enclosing purlin bar planting is connected with the enclosing purlin and the rear row of piles.

Preferably, the arrangement pitch of the front row piles is half that of the rear row piles.

After the structure is adopted, the utility model has the beneficial effects that: when the height difference between the inside and outside of the site is large, the foundation pit can be maintained to be safe and stable, and the foundation pit can be used as a permanent anti-slip facility, so that the safety and stability of crowded side slopes after construction is finished are ensured.

Drawings

For a clearer description of embodiments of the present utility model or technical solutions in the prior art, the present utility model is described in detail by the following detailed description and the accompanying drawings.

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a top view of the present utility model;

FIG. 3 is a schematic view of the distribution position of the retaining plate 7 according to the present utility model;

Fig. 4 is a schematic connection view of the soil guard plate 7 of the present utility model;

Fig. 5 is a schematic view showing the internal structure of the soil guard plate 7 according to the present utility model;

FIG. 6 is a schematic view of the structure of the purlin 6 of the utility model;

Reference numerals illustrate: front row piles 1, rear row piles 2, front row pile crown beams 3, rear row pile crown beams 4, connecting beams 5, enclosing purlins 6, retaining plates 7, plain concrete cushion layers 8, rear row pile axes 9, anchoring steel bars 10, stirrups 11, vertical steel bars 12, straight tie bars 13, stiffening stirrups 14, pile main bars 16, enclosing purlin hanging bars 17 and enclosing purlin planting bars 18.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, the present utility model is described below by means of specific embodiments shown in the accompanying drawings. It should be understood that the description is only illustrative and is not intended to limit the scope of the utility model. In addition, in the following description, descriptions of well-known structures and techniques are omitted so as not to unnecessarily obscure the present utility model.

It should be noted here that, in order to avoid obscuring the present utility model due to unnecessary details, only structures and/or processing steps closely related to the solution according to the present utility model are shown in the drawings, while other details not greatly related to the present utility model are omitted.

Referring to fig. 1-6, the following technical solutions are adopted in this embodiment: the pile comprises a front row of piles 1, a rear row of piles 2, a front row of pile crown beams 3, a rear row of pile crown beams 4, a connecting beam 5, an enclosing purlin 6, a soil retaining plate 7 and a plain concrete cushion layer 8; the front row piles 1 and the rear row piles 2 are arranged in the foundation in a drilling and pouring mode; the top ends of the front row piles 1 and the rear row piles 2 are respectively provided with an integrated front row pile crown beam 3 and a rear row pile crown beam 4, and the height difference of 60-70cm is kept between the front row piles 1 and the rear row piles 2; the front end of the rear row pile 2 is provided with an integrated enclosing purlin 6, and the enclosing purlin 6 is horizontally connected with the front row pile crown beam 3 through a connecting beam 5 to realize the connection of the front row pile 1 and the rear row pile 2; a soil retaining plate 7 is arranged between the rear row piles 2, and a plain concrete cushion layer 8 is arranged at the bottom of the soil retaining plate 7.

The retaining plate 7 is arranged on the front side of a rear pile row axis 9 of the rear pile row 2, and the retaining plate 7 is connected with the rear pile row 2 through matching pouring of rear embedded anchoring steel bars 10; the inside of retaining plate 7 be provided with by stirrup 11 and vertical reinforcing bar 12 constitution steel joist, and steel joist's centre inside is provided with straight lacing wire 13, steel joist's centre has still cup jointed U type's stiffening stirrup 14.

In addition, the front end of the pile main rib 16 in the rear row pile 2 is welded with an enclosing purlin hanging rib 17, the tail end of the enclosing purlin hanging rib 17 is bent to form an enclosing purlin 6 keel, the rear end of the enclosing purlin 6 is provided with an enclosing purlin planting rib 18, and the enclosing purlin planting rib 18 is connected with the enclosing purlin 6 and the rear row pile 2; the arrangement space of the front row of piles 1 is half that of the rear row of piles 2.

The construction flow of the specific embodiment is as follows:

1. constructing a front row pile 1 and a rear row pile 2 of the bored pile, excavating a foundation pit to the elevation of the bottom of a crown beam of the rear row pile, and pouring a crown beam 4 of the rear row pile;

2. Excavating a foundation pit to the elevation of the crown beam bottom of the front row pile, and cleaning soil between the rear row piles until the axis 9 of the rear row piles and the crown beam top of the front row piles are 60cm downward;

3. and a plain concrete cushion layer 8 with the width of 50cm and the thickness of 10cm is poured between the rear row piles.

4. And the anchor bars 10 are implanted at the side of the rear row piles, the length of the anchor bars 10 extending into the rear row piles 2 is 15 times of the diameter of the steel bars, the length of the anchor bars 10 extending into the soil retaining plates 7 is 42 times of the diameter of the steel bars, and the vertical spacing of the anchor bars 10 is 30cm.

5. Stirrups 11 and vertical steel bars 12 of the retaining plate are arranged to form keels; the tie bars 13 and the stiffening stirrups 14 are arranged in the soil-blocking plate 7 for structural reinforcement, drain hole pipelines are reserved, and the soil-blocking plate 7 with the thickness of 30cm is poured.

6. The method comprises the steps that an enclosing purlin hanging rib 17 is arranged, and the enclosing purlin hanging rib 17 is welded with the rear row pile main rib 16 in double sides, wherein the welding length is 15 times of the diameter of a steel bar; the purlin is provided with the embedded bars 18, the length of the inserted rear row piles 2 is 15 times of the diameter of the steel bars, and the length of the inserted purlin 6 is 35 times of the diameter of the steel bars.

7. And setting connecting beam and enclosing purlin steel bars, setting front row pile crown beam steel bars, and pouring the front row pile crown beam 3, the connecting beam 5 and the enclosing purlin 6.

8. And excavating a foundation pit to a substrate, backfilling the foundation pit to the top end of the front row pile crown beam 3 after the basement construction is completed, and taking the rear row piles 2 and the soil retaining plates 7 as permanent anti-slip measures.

9. After the construction is completed, when the field is lower than the field outside, the soil retaining plate is arranged at the inner side of the leaning field; when the field is higher than the field, the soil retaining plate is arranged at the outer side of the field.

The utility model can solve the problem that when the height difference between the inside and outside of the site is large, the foundation pit can be maintained to be safe and stable, and can be used as a permanent anti-skid facility to ensure the safety and stability of the crowded side slope after the construction is completed.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.

Claims

1. A double "chair" stake supporting construction, its characterized in that: the pile comprises a front row of piles, a rear row of piles, a front row of pile crown beams, a rear row of pile crown beams, a connecting beam, an enclosing purlin, a soil retaining plate and a plain concrete cushion layer; the front row piles and the rear row piles are arranged in the foundation in a drilling and pouring mode; the top ends of the front row piles and the rear row piles are respectively provided with an integrated front row pile crown beam and a rear row pile crown beam, and the height difference of 60-70cm is kept between the front row piles and the rear row piles; the front end of the rear row of piles is provided with an integrated enclosing purlin, and the enclosing purlin is horizontally connected with the front row of piles crown beam through a connecting beam to realize the connection of the front row of piles and the rear row of piles; and a soil retaining plate is arranged between the rear row piles, and a plain concrete cushion layer is arranged at the bottom of the soil retaining plate.

2. The double row "chair" pile support structure according to claim 1, wherein: the soil retaining plate is arranged on the front side of the rear pile row axis of the rear pile row, and the soil retaining plate is connected with the rear pile row through the cooperation pouring of the rear implanted anchoring steel bars.

3. The double row "chair" pile support structure according to claim 1, wherein: the inside of retaining board be provided with by stirrup and vertical reinforcing bar constitution steel joist, and the centre inside of steel joist is provided with the straight lacing wire, the centre of steel joist has still cup jointed the stiffening stirrup of U type.

4. The double row "chair" pile support structure according to claim 1, wherein: the front end welding of the inside stake main muscle of back row pile have and enclose purlin hanging bar, enclose purlin hanging bar tail end and bend and form and enclose the purlin fossil fragments, and enclose the purlin rear end and be provided with and enclose the purlin and plant the muscle, enclose purlin and plant the muscle and connect and enclose purlin and back row pile.

5. The double row "chair" pile support structure according to claim 1, wherein: the arrangement space of the front row piles is half that of the rear row piles.