CN217500251U

CN217500251U - Buttress type double-row pile mixed supporting structure

Info

Publication number: CN217500251U
Application number: CN202221538959.7U
Authority: CN
Inventors: 邢国然; 应乘风; 朱志杰; 邢彩凤; 邢一飞
Original assignee: Zhejiang Lanchi Construction Technology Co ltd
Current assignee: Zhejiang Lanchi Construction Technology Co ltd
Priority date: 2022-06-20
Filing date: 2022-06-20
Publication date: 2022-09-27
Anticipated expiration: 2032-06-20

Abstract

The utility model provides a buttress type double-row pile mixed supporting structure, which comprises a double-row pile foundation, and consists of a front row pile and a rear row pile, wherein a joist comprises a front crown beam, a rear crown beam and a plurality of connecting beams, the front crown beam is arranged at the top of the front row pile, the rear crown beam is arranged at the top of the rear row pile, the connecting beams are arranged between the front row pile and the rear row pile, the buttress type wall faces to the foundation pit side and comprises a plurality of vertical plates, a bottom plate and an oblique support, the plurality of vertical plates are connected between the front row pile, the bottom extends into the front row pile, the bottom is arranged between the connecting beams, the two ends are respectively connected with the front row pile and the rear crown beam, the bottom plate is vertically connected with the vertical plates, the oblique support is connected between the front row pile and the rear crown beam, the buttress type double-row pile mixed supporting structure simplifies the construction process, the bottom of the vertical plates extends into the front row pile, the bottom is a continuous wall surface of the front row pile, the upper buttress type wall is a supporting wall, and the load is transferred to the foundation through the joist, effectively reduce the horizontal soil pressure of soil body, improve the wholeness and the bulk rigidity of whole supporting construction.

Description

Buttress type double-row pile mixed supporting structure

Technical Field

The utility model relates to a supporting construction technical field specifically is a buttress formula double row pile mixes supporting construction.

Background

The utilization of underground space plays an important role in improving the ground environment. The urban underground comprehensive pipe gallery is advocated to be built while underground traffic is developed and urban atmospheric pollution is reduced. The underground space can be developed into underground railways, underground stations, underground roads, underground parking garages, underground shopping malls, underground civil defense projects and the like, and the excavation operation of the underground space can not leave a foundation pit supporting structure. The foundation pit supporting structure is used for supporting, reinforcing and protecting the side wall of the foundation pit and the surrounding environment in order to ensure the safety of the construction of an underground structure and the surrounding environment of the foundation pit.

The double-row pile foundation pit supporting structure is more and more widely applied, the foundation pit supporting structure is a spatial portal frame type structure system formed by two rows of parallel reinforced concrete piles and connecting beams of pile tops, and the common double-row pile foundation pit supporting structure has the advantages of high overall rigidity, simplicity and convenience in construction, rapidness and the like, and is suitable for being used when the excavation depth of a foundation pit is not large. When the excavation depth of a foundation pit is large or geological conditions are poor, or under some special conditions, the design requirements cannot be met by adopting a common double-row pile foundation pit supporting structure at the moment, particularly under the working condition that the foundation pit is dug and filled while the foundation pit is dug, the natural elevation needs to be filled with earthwork, the traditional double-row pile foundation pit supporting structure is adopted, the foundation pit piles can be overlong to influence the bending resistance and the pressure resistance, and the earthwork dug out from the foundation pit cannot be better obtained.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

Not enough to prior art, the utility model provides a buttress formula double row pile mixes supporting construction has solved the problem that proposes in the above-mentioned background art.

(II) technical scheme

In order to achieve the above purpose, the utility model discloses a following technical scheme realizes: a buttress type double-row pile mixed supporting structure comprises double-row pile foundations, a joist and a buttress type wall, wherein the double-row seat foundations are composed of a plurality of rows of front-row piles and rear-row piles which are arranged side by side, the front-row piles and the rear-row piles are underground continuous walls, the joist comprises a front crown beam, a rear crown beam and a plurality of connecting beams, the front crown beam is arranged at the top of the front-row piles, the rear crown beam is arranged at the top of the rear-row piles, the connecting beams are arranged between the front-row piles and the rear-row piles in an equidistant and parallel mode, a buttress type wall surface faces towards a foundation pit side and comprises a plurality of vertical plates, a plurality of bottom plates and a plurality of inclined supports, a filling space is formed and used for filling work, the plurality of vertical plates are connected between the front-row piles, the bottoms of the front-row piles extend into the front-row piles, the bottom plates are horizontally arranged between the connecting beams at intervals, two ends of the front-row piles and the rear crown beams are respectively connected with the vertical plates, the plurality of inclined supports are connected between the front crown beam and the rear crown beam and are arranged at intervals.

Preferably, the front row of piles and the rear row of piles are flush and are both below a natural elevation, and the bottoms of the vertical plates are deep below the natural elevation.

Preferably, the pile bolck elevation of the front row pile is higher than the pile bolck elevation of back row pile, be connected through continuous diagonal bracing between front row pile and the back row pile, be equipped with the riser along foundation ditch side direction interval between diagonal bracing and the front row pile, the pile bolck difference in height between front row pile and the back row pile is 3.0 ~ 6.0M.

Preferably, the front row of piles and the rear row of piles are I-shaped steel piles.

Preferably, the inclined supports are inclined rib plates, the distance between the inclined rib plates is 0.4-0.6 times of the height of the vertical plate, the thickness of the inclined rib plates is 0.1-0.2 times of the distance between two adjacent buttress plates, and the height-width ratio of the inclined rib plates is 1.5-2.0 mm.

Preferably, the diagonal support is a bolt.

(III) advantageous effects

The utility model provides a buttress formula double row pile mixes supporting construction. The method has the following beneficial effects:

1. this buttress formula double row pile mixed supporting construction, be applied to the foundation ditch operating mode that needs the elevation of banketing, compare traditional excavation supporting's long fender pile mode, the work progress has been simplified, accelerate the foundation ditch construction progress, construction cost and cost have been saved, transmit the banketing load on the buttress formula wall to front stall and back row pile basis through the joist, the atress is reasonable, and design benefit, make full use of soil body dead weight antidumping ability, effectively reduce the unfavorable effect of soil body level soil pressure, be applicable to the high fill side slope on the deep filled ground and strut, the front row pile is stretched into to the riser bottom simultaneously, the continuous wall of front row pile is regarded as to the riser bottom, the riser is regarded as the buttress formula wall of front row pile, improve the wholeness and the bulk rigidity of whole supporting construction.

Drawings

FIG. 1 is a first schematic structural diagram of the present invention;

FIG. 2 is a second schematic structural view of the present invention;

fig. 3 is a third schematic structural diagram of the present invention.

In the figure: 1. front row piles; 2. back row piles; 3. a front crown beam; 4. a rear crown beam; 5. a connecting beam; 6. a base plate; 7. a vertical plate; 8. and (5) obliquely supporting.

Detailed Description

The embodiment of the utility model provides a buttress type double-row pile mixed supporting structure, as shown in figure 1-3, comprising a double-row pile foundation, a joist and a buttress type wall, wherein the double-row seat foundation is composed of a plurality of rows of front row piles 1 and rear row piles 2 which are arranged side by side, the front row piles 1 and the rear row piles 2 are underground continuous walls, the thickness of the underground continuous walls is 800-1200 mm, the joist comprises a front crown beam 3, a rear crown beam 4 and a plurality of connecting beams 5, the front crown beam 3 is arranged on the top of the front row piles 1, the rear crown beam 4 is arranged on the top of the rear row piles 2, the connecting beams 5 are arranged between the front row piles 1 and the rear row piles 2 in an equidistant manner, the buttress type wall surface faces to the foundation pit side and comprises a plurality of vertical plates 7, a plurality of bottom plates 6 and a plurality of oblique supports 8, a filling space is formed for filling work, the plurality of vertical plates 7 are connected between the front row piles 1, the bottom plate 6 extends into the front row piles 1, the horizontal intervals are arranged between the connecting beams 5, two ends of the front row of piles are respectively connected with the front row of piles 1 and the rear crown beam 4, the bottom plate 6 is vertically connected with the vertical plate 7, and the plurality of inclined supports 8 are connected between the front crown beam 3 and the rear crown beam 4 at intervals.

Preferably, the spacing distance between the front row of piles 1 and the rear row of piles 2 is 2.5m to 5.0 m.

As shown in fig. 1, in the first embodiment of the present invention, the front row piles 1 and the rear row piles 2 are flush and are all below the natural elevation, and the bottom of the vertical plate 7 is deep below the natural elevation.

The pile top elevation of the front row pile 1 is higher than that of the rear row pile 2, the front row pile 1 is connected with the rear row pile 2 through a continuous inclined support 8, vertical plates 7 are arranged between the inclined support 8 and the front row pile 1 at intervals along the side direction of a foundation pit, the pile top height difference between the front row pile 1 and the rear row pile 2 is 3.0-6.0M, the cross section of the supporting beam is rectangular, and the width of the supporting beam is not less than the pile diameter of the double-row pile foundation

Regarding the double-row pile foundation, the front row pile 1 and the rear row pile 2 can be selected from I-shaped steel piles or circular steel columns, and the pile diameter is 0.8-2.0 m.

Preferably, in the embodiment of the scheme, the inclined supports 8 can be selected as inclined rib plates, and preferably, the distance between the inclined rib plates is 0.4-0.6 times of the height of the vertical plate 7, the thickness of the inclined rib plates is 0.1-0.2 times of the distance between two adjacent buttress plates, and the height-width ratio of the inclined rib plates is 1.5-2.0 m.

Preferably, in the embodiment of the present invention, the diagonal support 8 is an anchor rod, and two ends of the anchor rod are respectively connected to the front crown beam 3 and the rear crown beam 4.

Preferably, the tie beam 5 has a thickness of 0.2m to 0.5 m.

The utility model discloses still provide above-mentioned embodiment counterfort formula double row pile mix the excavation flow of laying the flow, specifically include following step:

step one, measurement and positioning: positioning on the site by using a theodolite, a level gauge, a tower ruler and a steel tape according to on-site investigation and combined design;

positioning retest and point placement: carrying out retesting after positioning, and determining pile positions of the front row of foundation piles and the rear row of foundation piles;

step three, constructing the front row foundation piles and the rear row foundation piles: the method is characterized in that a rotary excavator is generally adopted to form hole cast-in-place piles, or manual hole cast-in-place piles can be adopted, I-shaped piles or round piles are sunk into the soil, the main reinforcement of the pile top is reserved with the anchoring length of a joist, and the sunk piles of the front row of piles 1 can be set to be flush with the rear row of piles 2 or higher than the rear row of piles 2 according to setting requirements.

Step four, joist construction (comprising a front crown beam 3, a rear crown beam 4 and a connecting beam 5): and binding steel bars of the joists, and integrally pouring the front crown beam 3, the rear crown beam 4 and the connecting beam 5.

Step five, constructing the bottom plate 6, the vertical plate 7 and the inclined support 8: the vertical plates 7 are arranged between the front row piles 1, the bottoms of the vertical plates extend into the front row piles 1, the bottom plates 6 are arranged between the connecting beams 5, and reinforcing steel bars between the vertical plates 7 and the inclined supports 8 are bound and concrete is poured.

And sixthly, excavating and filling the foundation pit, namely excavating soil on the side of the foundation pit, and lifting the excavated earth to fill the inner side of the counterfort type wall.

To sum up, this buttress formula double row pile mixed supporting construction is applied to the foundation ditch operating mode that needs the elevation of banketing, compare traditional excavation supporting's long fender pile mode, the work progress has been simplified, accelerate the foundation ditch construction progress, construction cost and cost have been saved, pass through the joist and transmit the banketing load on the buttress formula wall to front stall and back row pile 2 basis, the atress is reasonable, and design benefit, make full use of soil body dead weight antidumping ability, effectively reduce the adverse effect of soil body level soil pressure, be applicable to the high fill side slope on the deep filling ground and strut, simultaneously front row pile 1 is stretched into to riser 7 bottom, the continuous wall of front row pile 1 is regarded as to riser 7 bottom, riser 7 is regarded as the buttress formula wall of front row pile 1, improve wholeness and the bulk rigidity of whole supporting construction.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a buttress formula double row pile mixes supporting construction which characterized in that: the double-row pile foundation comprises double-row pile foundations, joists and buttress walls, wherein the double-row pile foundations comprise multiple rows of front piles (1) and rear piles (2) which are arranged in parallel, the front piles (1) and the rear piles (2) are underground continuous walls, the joists comprise front crown beams (3), rear crown beams (4) and multiple connecting beams (5), the front crown beams (3) are arranged at the tops of the front piles (1), the rear crown beams (4) are arranged at the tops of the rear piles (2), the connecting beams (5) are equidistantly arranged between the front piles (1) and the rear piles (2) in parallel, the buttress walls face the foundation pit side and comprise multiple wall type vertical plates (7), multiple bottom plates (6) and multiple oblique supports (8) to form a soil filling space for soil filling operation, the vertical plates (7) are connected between the front piles (1), and the bottoms of the front piles (1) are inserted between the front piles, bottom plate (6) horizontal interval sets up between connection roof beam (5), and front row pile (1) and back crown beam (4) are connected respectively at both ends, bottom plate (6) are connected perpendicularly with riser (7), and are a plurality of diagonal brace (8) are connected between front crown beam (3) and back crown beam (4), and the interval sets up.

2. The buttress-type double-row pile hybrid supporting structure according to claim 1, wherein: the front row piles (1) and the rear row piles (2) are flush and are all below natural elevation, and the bottoms of the vertical plates (7) are deep under the natural elevation.

3. The buttress-type double-row pile hybrid supporting structure according to claim 1, wherein: preceding campshed (1) pile bolck elevation is in the pile bolck elevation of back campshed (2), be connected through continuous diagonal bracing (8) between preceding campshed and the back campshed, be equipped with riser (7) along foundation ditch side direction interval between diagonal bracing (8) and preceding campshed (1), the pile bolck difference in height between preceding campshed (1) and back campshed (2) is 3.0 ~ 6.0 m.

4. The buttress-type double-row pile hybrid supporting structure according to claim 1, wherein: the front row of piles (1) and the rear row of piles (2) are H-shaped steel piles.

5. The buttress-type double-row pile hybrid supporting structure according to claim 1, wherein: the inclined supports (8) are inclined rib plates, the distance between the inclined rib plates is 0.4-0.6 times of the height of the vertical plate, the thickness of the inclined rib plates is 0.1-0.2 times of the distance between two adjacent buttress plates, and the height-width ratio of the inclined rib plates is 1.5-2.0 mm.

6. The buttress-type double-row pile hybrid supporting structure according to claim 1, wherein: the inclined support (8) is an anchor rod.