CN216339585U - A vertical pile and batter pile coupled type underground structure for red clay area - Google Patents
A vertical pile and batter pile coupled type underground structure for red clay area Download PDFInfo
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- CN216339585U CN216339585U CN202122917676.5U CN202122917676U CN216339585U CN 216339585 U CN216339585 U CN 216339585U CN 202122917676 U CN202122917676 U CN 202122917676U CN 216339585 U CN216339585 U CN 216339585U
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Abstract
The utility model belongs to the technical field of foundation pit supporting, discloses a straight pile and inclined pile coupled foundation pit supporting structure for a red clay area, and aims to solve the problem that a red clay foundation is high in manufacturing cost and long in construction period due to the fact that a strong supporting measure is adopted. The utility model comprises a row of vertical cast-in-place piles, wherein a row of inclined piles is arranged on the side, close to a foundation pit, of each cast-in-place pile, the tops of the inclined piles are connected together through poured crown beams, the tops of the cast-in-place piles are connected with the crown beams through reinforced concrete connecting beams, reinforcing steel bar meshes are connected between the adjacent inclined piles, and concrete layers are sprayed on the reinforcing steel bar meshes. When the cast-in-place pile and the inclined pile are poured, the concrete can fill gaps of soil layers on the side wall of the pile hole, and the pile side resistance of the concrete pile can be effectively improved, so that the requirement of improving the bearing capacity of a single pile is met, and the safety of foundation pit support in a red clay area is improved.
Description
Technical Field
The utility model belongs to the technical field of foundation pit supporting, and particularly relates to a straight pile and inclined pile coupled foundation pit supporting structure for a red clay area, which is used for supporting a foundation pit in the red clay area.
Background
The red clay is high-plasticity clay formed by strongly chemically weathering carbonate rocks, is widely distributed in regions such as Yunobao plateau, Sichuan, Hunan, Hubei and the like, and is regional special soil. The mineral components of the weathering late-stage products of red clay carbonates and other rocks still contain a certain amount of quartz particles, and a large amount of clay particles mainly comprise halloysite, hydromicas, colloid SiO2, hematite and gibbsite miner lamp, and contain no or little organic matters. The natural water content and the pore size of the red clay are higher, generally 30-60% and 1.1-1.7 respectively, and the red clay is in a saturated state at a plurality of positions, and the saturation is more than 85%. The clay content of the red clay is usually over 50 percent, the plasticity index is high, the water content is 0.5-0.8, and the clay is mostly in a hard plastic state and a hard or plastic state; low compressibility and high strength, and the compression coefficient is generally 0.1MPa-0.4 MPa.
Red clay generally has higher water content and loose structure, but has higher strength and is often mistaken for better foundation soil. Because the contractibility of the red clay is strong, when the thickness in the horizontal direction is not greatly changed, the uneven settlement is easily caused to cause the damage of the building.
Based on the safety and stability consideration of the foundation pit in the red clay region, strong support measures such as 'anti-slide pile + anchor cable' strong support measures are required; however, the strong support measures such as the anti-slide piles and the anchor cables are high in manufacturing cost and long in construction period.
SUMMERY OF THE UTILITY MODEL
The utility model provides a straight pile and inclined pile coupled foundation pit supporting structure for a red clay area, aiming at solving the problem of high construction cost and long construction period caused by adopting a strong supporting measure for a red clay foundation, and the construction cost and the construction period can be reduced on the premise of improving the safety of red clay foundation pit supporting.
In order to solve the technical problem, the technical scheme adopted by the utility model is as follows:
the utility model provides a straight stake and batter pile coupling type foundation ditch supporting construction for red clay area, includes one row of bored concrete pile who stretches into in the soil body and be vertical form, its characterized in that, bored concrete pile is close to the foundation ditch side and is provided with one row of batter pile that is the slope form, the batter pile is located the edge of foundation ditch, and the batter pile upwards sets up along the direction slope of the bottom of foundation ditch to the top of foundation ditch, and the top of each batter pile links together through the crown beam of pouring, and the top of each bored concrete pile is in the same place through reinforced concrete tie beam and crown beam interconnect, is connected with the reinforcing bar net piece between the adjacent batter pile, the spraying has concrete layer on the reinforcing bar net piece.
In some embodiments, a catch basin is cut into the top of the soil in a direction away from the excavation, the catch basin being further away from the excavation than the cast-in-place pile.
In some embodiments, the cast-in-place pile and the batter pile are both composed of a reinforcement cage and concrete poured inside and outside the reinforcement cage.
In some embodiments, the reinforcement cage of the cast-in-place pile and the reinforcement in the reinforced concrete coupling beam are integrally spliced with each other, the reinforcement in the reinforced concrete coupling beam and the reinforcement in the crown beam are integrally spliced with each other, and the reinforcement in the crown beam and the reinforcement cage of the batter pile are integrally spliced with each other.
In some embodiments, the lower ends of the cast-in-place piles and the batter piles each extend into the bearing layer of the earth, and the lower ends of the cast-in-place piles and the batter piles are located below the floor of the foundation pit.
Compared with the prior art, the utility model has the following beneficial effects:
according to the vertical pile and inclined pile coupled foundation pit supporting structure for the red clay area, the vertical cast-in-place piles (or called vertical piles) and the inclined piles which are obliquely arranged are poured, and the top beams and the reinforced concrete connecting beams form an integral structure to support the side wall of the foundation pit in the red clay area. Meanwhile, when the cast-in-place pile and the inclined pile are poured, concrete can fill gaps of soil layers on the side wall of the pile hole, and pile side resistance of the concrete pile (the cast-in-place pile and the inclined pile) can be effectively improved, so that the requirement of improving bearing capacity of a single pile is met, and the safety of foundation pit support in a red clay area is improved.
Compared with the strong support measures (such as anti-slide piles and anchor cables) in the prior art, the problem of hole collapse during anchor hole construction in a red clay area is reduced or reduced, so that the construction period is further shortened, and the construction cost is reduced.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
the labels in the figure are: 1. the foundation pit comprises a foundation pit body 101, the bottom of the foundation pit body 102, the top of the foundation pit body 2, a cast-in-place pile 3, an inclined pile 4, a crown beam 5, a reinforced concrete coupling beam 6, a concrete layer 7, a catch drain 8 and a drainage drain.
Detailed Description
The present invention will be further described with reference to the following examples, which are intended to illustrate only some, but not all, of the embodiments of the present invention. Based on the embodiments of the present invention, other embodiments used by those skilled in the art without any creative effort belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; furthermore, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, as they may be fixedly connected, detachably connected, or integrally connected, for example; may be a mechanical connection; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
With reference to the accompanying drawings, the vertical pile and inclined pile coupled foundation pit supporting structure for the red clay area comprises a row of cast-in-place piles 2 extending into a soil body and being vertical, a row of inclined piles 3 are arranged on the side, close to a foundation pit 1, of the cast-in-place piles 2, the inclined piles 3 are located on the edge of the foundation pit 1, the inclined piles 3 are obliquely and upwardly arranged along the direction from the bottom 101 of the foundation pit to the top 102 of the foundation pit, the tops of the inclined piles 3 are connected together through poured crown beams 4, the tops of the cast-in-place piles 2 are connected with the crown beams 4 through reinforced concrete connecting beams 5, a steel bar mesh sheet is connected between every two adjacent inclined piles 3, and a concrete layer 6 is sprayed on the steel bar mesh sheet.
In the specific implementation process, the cast-in-place pile 2 and the batter pile 3 are drilled into a hole by a long-arm auger drilling machine or a rotary drilling rig to form a pile hole, the bottom of the pile hole is located in a rock layer (a bearing layer) of a soil body, then a reinforcement cage is placed in the pile hole, concrete is poured to form the vertical cast-in-place pile 2 (or a vertical pile) and the batter pile 3 in an inclined shape, then a crown beam 4 and a reinforced concrete connecting beam 5 are poured on the top of the batter pile 3 (wherein the crown beam 4 and the reinforced concrete connecting beam 5 can be integrally poured), when the concrete to be poured meets the strength requirement, the batter pile 3 is excavated from the side of the foundation pit, then mesh reinforcing steel bars are hung between the adjacent batter piles 3, and the concrete is sprayed on the mesh reinforcing steel bars to form a concrete layer 6.
In the excavation process of the foundation pit 1, the inclined piles 3 are gradually excavated according to the depth of the foundation pit, and the concrete layer 6 is formed by hanging the reinforcing mesh and spraying concrete.
The utility model discloses a row of cast-in-place piles and a row of inclined piles, which are designed for one side wall of a foundation pit, namely, the row of cast-in-place piles and the row of inclined piles are arranged on one side wall of the foundation pit. If the soil bodies of the four side walls of the foundation pit are red clay layers, arranging a row of cast-in-place piles and a row of inclined piles on the four side walls of the foundation pit; if other side walls of the foundation pit are of other soil body structures, a specific supporting mode can be set according to the soil body condition so as to meet the requirement of foundation pit supporting and reduce the cost of the foundation pit supporting.
In some embodiments, a catch basin 7 is formed along the top of the soil body (i.e., the top 102 of the foundation pit) in a direction away from the foundation pit 1, the catch basin 7 is located further away from the foundation pit 1 than the cast-in-place pile 2, and the catch basin 7 is used to prevent water from entering the foundation pit 1. Wherein, still seted up escape canal 8 in the bottom 101 of foundation ditch, utilize escape canal 8 to carry out the drainage to guarantee the drying in the foundation ditch 1, be convenient for provide good construction environment.
In some embodiments, each of the cast-in-place pile 2 and the inclined pile 3 is composed of a reinforcement cage and concrete poured on the inner side and the outer side of the reinforcement cage, and the cast-in-place pile 2 and the inclined pile 3 are formed by the reinforcement cage and the concrete poured so that the concrete can enter gaps of soil bodies, and the pile side resistance of the concrete piles (the cast-in-place piles and the inclined piles) can be effectively improved, so that the requirement of improving the bearing capacity of a single pile is met, and the safety of foundation pit support in a red clay area is improved.
In some embodiments, the reinforcement cage of the cast-in-place pile 2 and the reinforcement in the reinforced concrete coupling beam 5 are integrally spliced with each other, the reinforcement in the reinforced concrete coupling beam 5 and the reinforcement in the crown beam 4 are integrally spliced with each other, and the reinforcement in the crown beam 4 and the reinforcement cage of the batter pile 3 are integrally spliced with each other, so that the cast-in-place pile 2, the reinforced concrete coupling beam 5, the crown beam 4 and the batter pile 3 form an integral structure, and the strength and stability of the foundation pit 1 support are further improved.
In some embodiments, the lower ends of both cast-in-place piles 2 and oblique piles 3 extend into the bearing layer of the soil body, and the lower ends of cast-in-place piles 2 and oblique piles 3 are located below the bottom surface of foundation pit 1.
According to the vertical pile and inclined pile coupled foundation pit supporting structure for the red clay area, the vertical cast-in-place piles (or called vertical piles) and the inclined piles which are obliquely arranged are poured, and the top beams and the reinforced concrete connecting beams form an integral structure to support the side wall of the foundation pit in the red clay area. Meanwhile, when the cast-in-place pile and the inclined pile are poured, concrete can fill gaps of soil layers on the side wall of the pile hole, and pile side resistance of the concrete pile (the cast-in-place pile and the inclined pile) can be effectively improved, so that the requirement of improving bearing capacity of a single pile is met, and the safety of foundation pit support in a red clay area is improved.
Compared with the strong support measures (such as anti-slide piles and anchor cables) in the prior art, the problem of hole collapse during anchor hole construction in a red clay area is reduced or reduced, so that the construction period is further shortened, and the construction cost is reduced.
While the utility model has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the utility model. Those skilled in the art can make various changes, modifications and equivalent arrangements, which are equivalent to the embodiments of the present invention, without departing from the spirit and scope of the present invention, and which may be made by utilizing the techniques disclosed above; meanwhile, any changes, modifications and variations of the above-described embodiments, which are equivalent to those of the technical spirit of the present invention, are within the scope of the technical solution of the present invention.
Claims (5)
1. The utility model provides a straight stake and batter pile coupling type foundation ditch supporting construction for red clay area, includes one row of bored concrete pile who stretches into in the soil body and be vertical form, its characterized in that, bored concrete pile is close to the foundation ditch side and is provided with one row of batter pile that is the slope form, the batter pile is located the edge of foundation ditch, and the batter pile upwards sets up along the direction slope of the bottom of foundation ditch to the top of foundation ditch, and the top of each batter pile links together through the crown beam of pouring, and the top of each bored concrete pile is in the same place through reinforced concrete tie beam and crown beam interconnect, is connected with the reinforcing bar net piece between the adjacent batter pile, the spraying has concrete layer on the reinforcing bar net piece.
2. The vertical pile and inclined pile coupled type foundation pit supporting structure for red clay areas as claimed in claim 1, wherein a cut-off trench is opened at the top of the soil body in a direction away from the foundation pit, the cut-off trench being further away from the foundation pit than the cast-in-place pile.
3. The vertical pile and inclined pile coupled foundation pit supporting structure for red clay areas according to claim 1, wherein the cast-in-place pile and the inclined pile are both composed of a reinforcement cage and concrete poured on the inner side and the outer side of the reinforcement cage.
4. The vertical pile and batter pile coupled foundation pit supporting structure for red clay areas according to any one of claims 1 to 3, wherein the reinforcement cage of the cast-in-place pile and the reinforcement in the reinforced concrete coupling beam are spliced into a whole with each other, the reinforcement in the reinforced concrete coupling beam and the reinforcement in the crown beam are spliced into a whole with each other, and the reinforcement in the crown beam and the reinforcement cage of the batter pile are spliced into a whole with each other.
5. The vertical pile and batter pile coupled foundation pit supporting structure for red clay areas of claim 1, wherein the lower ends of the cast-in-place piles and batter piles extend into the bearing layer of the soil body, and the lower ends of the cast-in-place piles and batter piles are located below the bottom surface of the foundation pit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122917676.5U CN216339585U (en) | 2021-11-25 | 2021-11-25 | A vertical pile and batter pile coupled type underground structure for red clay area |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122917676.5U CN216339585U (en) | 2021-11-25 | 2021-11-25 | A vertical pile and batter pile coupled type underground structure for red clay area |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216339585U true CN216339585U (en) | 2022-04-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122917676.5U Active CN216339585U (en) | 2021-11-25 | 2021-11-25 | A vertical pile and batter pile coupled type underground structure for red clay area |
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| CN (1) | CN216339585U (en) |
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- 2021-11-25 CN CN202122917676.5U patent/CN216339585U/en active Active
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