CN215441915U - Foundation pit supporting structure and foundation pit - Google Patents

Abstract

The foundation pit supporting structure comprises an inclined pile, a straight pile and a cross beam, wherein a first end of the inclined pile extends into the bottom surface of the foundation pit to a hard soil layer, and a second end of the inclined pile abuts against the top end of the side wall of the foundation pit; the vertical pile stretches into the top of slope of foundation ditch, the batter pile sets up a plurality ofly, and is a plurality of the equal fixed connection of second end of batter pile is on the crossbeam, the vertical pile stretches out the one end on the top of slope of foundation ditch with crossbeam fixed connection. The bottom that the batter pile slope stretched into the foundation ditch is fixed, and the slope top that the straight pile stretched into the foundation ditch is fixed, and the one end that the straight pile stretches out the foundation ditch slope top is fixed with crossbeam fixed connection on the batter pile to it is fixed with batter pile 1, reach the effect of strutting, protect the foundation ditch lateral wall, prevent the foundation ditch landslide. Simple structure, construction speed is fast, and the suitability is good, and is less to strutting the space requirement.

Description

Foundation pit supporting structure and foundation pit

Technical Field

The application relates to the technical field of building construction, in particular to a foundation pit supporting structure and a foundation pit.

Background

The foundation pit is a soil pit excavated at the design position of the foundation according to the elevation of the foundation and the plane size of the foundation. In order to prevent the landslide of the foundation pit in the using process, a supporting structure is usually required for protection. The support is a retaining, reinforcing and protecting measure adopted for the side wall and the surrounding environment in order to ensure the safety of the underground structure construction and the surrounding environment of the foundation pit. A temporary construction measure is supported, and is used in the foundation construction process, and the backfilling is carried out immediately after the foundation is finished.

Due to the temporary property, most construction units require the supporting structure to be constructed quickly and the manufacturing cost is low. Meanwhile, urban land supply in China is increasingly tense, a foundation pit supporting structure of some local buildings is not allowed to exceed a red line, and the supporting space is limited; the soft soil distribution in the east coastal region is wide, the supporting difficulty of a soft soil foundation pit is high, the suitability of the anchor cable is poor, and some supporting structures have to use an inner support to support, so that the supporting construction cost is high, the earthwork construction speed is low, and the demolition cost is high.

Content of application

An object of this application is to provide a foundation ditch supporting construction, simple structure, construction speed is fast, and the suitability is good, and is less to the requirement of supporting space, has higher practical value.

In order to achieve the purpose, the application provides the following technical scheme:

the foundation pit supporting structure comprises an inclined pile, a straight pile and a cross beam, wherein a first end of the inclined pile extends into the bottom surface of a foundation pit to a hard soil layer, and a second end of the inclined pile abuts against the top end of the side wall of the foundation pit; the vertical pile stretches into the top of slope of foundation ditch, the batter pile sets up a plurality ofly, and is a plurality of the equal fixed connection of second end of batter pile is on the crossbeam, the vertical pile stretches out the one end on the top of slope of foundation ditch with crossbeam fixed connection.

Optionally, the vertical piles are cement mixing piles, the cement mixing piles are arranged in a plurality of transverse rows, and the cement mixing piles penetrate into the impermeable layer.

Optionally, the cement mixing piles are arranged in two rows.

Optionally, an i-shaped steel is arranged in the cement mixing pile.

Optionally, the cross beam and the vertical pile are fixedly connected through a steel bar, one end of the steel bar is fixedly connected with the cross beam, and the other end of the steel bar is fixedly connected with the i-shaped steel.

Optionally, the reinforcing bar is provided in plurality.

Optionally, the beam is formed by pouring a first reinforcement cage and first concrete, and one end of the reinforcement is embedded in the concrete of the beam.

Optionally, the batter pile is cast by a second reinforcement cage and a second concrete.

Optionally, the first concrete and the second concrete are poured in one piece.

The application provides a foundation ditch, include: the foundation pit supporting structure is characterized by being any one of the foundation pit supporting structures.

The technical scheme provided by the application can comprise the following beneficial effects:

the application provides a pair of foundation ditch supporting construction is applied to among the building construction technical field, and the batter pile slope stretches into foundation ditch bottom to hard soil layer, and it is fixed that the slope top of foundation ditch is stretched into to the straight pile, and the straight pile stretches out the one end on foundation ditch slope top and the crossbeam fixed connection on the batter pile to it is fixed with the batter pile, reaches the effect of strutting, protects the foundation ditch lateral wall, prevents the foundation ditch landslide. Simple structure, construction speed is fast, and the suitability is good, and is less to strutting the space requirement.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a foundation pit supporting structure according to an embodiment of the present application;

fig. 2 is a schematic cross-sectional view of a foundation pit supporting structure according to an embodiment of the present application;

fig. 3 is a schematic structural view of a vertical pile of a foundation pit supporting structure according to an embodiment of the present application.

In the figure: 1. oblique piles; 2. a vertical pile; 3. a cross beam; 4. reinforcing steel bars; 5. and (4) H-shaped steel.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be described in detail below. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without making any creative effort, shall fall within the protection scope of the present application.

The specific embodiment of the application provides a foundation pit supporting structure, as shown in fig. 1-3, including batter pile 1, vertical pile 2 and crossbeam 3. The inclined pile 1 is provided with a first end and a second end, and the first end of the inclined pile 1 obliquely extends into the bottom of the foundation pit so as to be fixed on the ground at the bottom of the foundation pit. And the second end of the batter pile 1 extends out of the ground at the bottom of the foundation pit until abutting against the top end of the side wall of the foundation pit. Set up crossbeam 3 at the second end of batter pile 1, set up a plurality of batter piles 1 and make the second end of a plurality of batter piles 1 all with the lateral wall fixed connection of crossbeam 3, can set up batter pile 1 and crossbeam 3 perpendicularly. The vertical pile 2 is provided with a first end and a second end, wherein the first end extends into the slope top of the foundation pit to be fixed, and the second end extends out of the slope top of the foundation pit to be fixedly connected with the cross beam 3, so that the vertical pile is fixed with the inclined pile 1, the supporting effect is achieved, the side wall of the foundation pit is protected, and the foundation pit landslide is prevented.

Wherein the top of the foundation pit is the ground outside the foundation pit.

The batter pile 1 should stretch into the foundation ditch bottom surface until hard soil layer, guarantees sufficient steadiness.

Compared with the mode of anchor cable support, the mode can be applicable to soft soil foundation pits, the applicability is better, and compared with the mode of inner support, the mode has the advantages of simple structure, lower construction and dismantling cost, higher construction speed and smaller requirement on support space.

Wherein, the included angle between the inclined pile 1 and the ground of the bottom of the foundation pit is more than 70 degrees so as to ensure good supporting effect.

As an alternative implementation manner, in the specific example of the present application, as shown in fig. 1 to fig. 3, the vertical pile 2 is a cement mixing pile, which is a method for reinforcing a saturated soft clay foundation, and it uses cement as a curing agent, and forcibly mixes soft soil and the curing agent in the deep part of the foundation by a special mixing machine, and uses a series of physicochemical reactions generated between the curing agent and the soft soil to harden the soft soil into a high quality foundation with integrity, water stability and certain strength.

During actual construction, a plurality of cement mixing piles are constructed at the top of the foundation pit by using the mixing pile machine, so that the cement mixing piles are arranged along the direction parallel to the side wall of the foundation pit, the cement mixing piles of the cement piles penetrate into the impervious bed to form a waterproof curtain, underground water outside the foundation pit is blocked, and the underground water is prevented from permeating into the foundation pit. Before the cement mixing pile is constructed, the first end of the inclined pile 1 is obliquely extended into the bottom of the foundation pit so as to be fixed on the ground at the bottom of the foundation pit. And (3) extending the second end of the batter pile 1 out of the ground at the bottom of the foundation pit until the second end abuts against the top end of the side wall of the foundation pit. Set up crossbeam 3 at the second end of batter pile 1, set up a plurality of batter piles 1 and make the second end of a plurality of batter piles 1 all with crossbeam 3's lateral wall fixed connection. One end of the cement mixing pile extending out of the slope top of the foundation pit is fixedly connected with the cross beam 3, so that the cement mixing pile is fixed with the inclined pile 1, the supporting effect is achieved, the side wall of the foundation pit is protected, and the landslide of the foundation pit is prevented.

As an optional implementation manner, in the embodiment of the present application, as shown in fig. 2, two rows of cement mixing piles are arranged, and two rows of cement mixing piles are built on the top of the foundation pit by using a mixing pile machine, so that the two rows of cement mixing piles are all arranged in a direction parallel to the side wall of the foundation pit, so as to form two layers of waterproof curtains, and the water blocking effect is better.

Before the cement mixing pile is constructed, the first end of the inclined pile 1 is obliquely extended into the bottom of the foundation pit so as to be fixed on the ground at the bottom of the foundation pit. And (3) extending the second end of the batter pile 1 out of the ground at the bottom of the foundation pit until the second end abuts against the top end of the side wall of the foundation pit. Set up crossbeam 3 at the second end of batter pile 1, set up a plurality of batter piles 1 and make the second end of a plurality of batter piles 1 all with crossbeam 3's lateral wall fixed connection. And (3) fixedly connecting one ends of the two rows of cement mixing piles extending out of the slope top of the foundation pit with the cross beam 3 so as to be fixed with the inclined piles 1.

As an alternative implementation manner, in the specific embodiment of the present application, as shown in fig. 1 to fig. 3, after a plurality of cement mixing piles are built on the top of a foundation pit by using a mixing pile machine, an i-beam 5 is arranged in each cement mixing pile, the i-beam 5 extends out of the cement mixing pile, and after the cement mixing piles are solidified, the i-beam 5 is embedded into the cement mixing piles, so that the slip resistance and the shear resistance of the cement mixing piles are increased.

Before the cement mixing pile is constructed, the first end of the inclined pile 1 is obliquely extended into the bottom of the foundation pit so as to be fixed on the ground at the bottom of the foundation pit. And (3) extending the second end of the batter pile 1 out of the ground at the bottom of the foundation pit until the second end abuts against the top end of the side wall of the foundation pit. Set up crossbeam 3 at the second end of batter pile 1, set up a plurality of batter piles 1 and make the second end of a plurality of batter piles 1 all with crossbeam 3's lateral wall fixed connection. One end of the I-shaped steel 5 extending out of the cement mixing pile is fixedly connected with the cross beam 3, so that the I-shaped steel is fixed with the inclined pile 1 to achieve the supporting effect.

As an alternative implementation, in the specific embodiment of the present application, as shown in fig. 1 to 3, the beam 3 and the vertical pile 2 are fixedly connected by the steel bar 4. During concrete construction, after a plurality of cement mixing piles are built on the slope top of a foundation pit by using a mixing pile machine, the I-shaped steel 5 is arranged in each cement mixing pile, the I-shaped steel 5 extends out of the cement mixing pile, and after the cement mixing pile is solidified, the I-shaped steel 5 is embedded into the cement mixing pile. Before the cement mixing pile is constructed, the first end of the inclined pile 1 is obliquely extended into the bottom of the foundation pit so as to be fixed on the ground at the bottom of the foundation pit. And (3) extending the second end of the batter pile 1 out of the ground at the bottom of the foundation pit until the second end abuts against the top end of the side wall of the foundation pit. Set up crossbeam 3 at the second end of batter pile 1, set up a plurality of batter piles 1 and make the second end of a plurality of batter piles 1 all with crossbeam 3's lateral wall fixed connection. After the cross beam 3 at one end of the steel bar 4 is fixedly connected, the other end of the steel bar 4 is welded with one end, extending out of the cement mixing pile, of the I-shaped steel 5, so that the steel bar is fixed with the inclined pile 1 to achieve the supporting effect.

Wherein reinforcing bar 4 can set up many, and many reinforcing bars 4 are fixed crossbeam 3 and I-steel 5 jointly, and fixed effect is better.

As an optional implementation manner, in the embodiment of the present application, the cross beam 3 is formed by pouring a first reinforcement cage and first concrete, that is, the first reinforcement cage determines a structure, and then the first concrete is poured to form the whole cross beam 3, during the manufacturing process, the reinforcement 4 and the first reinforcement cage may be connected in advance, and after the first concrete is poured, the reinforcement 4 is wrapped in the first concrete, so as to fixedly connect the reinforcement 4 and the cross beam 3. The reinforcing steel bars 4 do not need to be additionally connected with the cross beam 3, and construction time is saved.

Wherein the first concrete has a specification above C25.

As an alternative implementation, in the specific embodiment of the present application, the batter pile 1 is formed by pouring the second reinforcement cage and the second concrete, that is, the second reinforcement cage defines the structure, and then the second concrete is poured to form the whole batter pile 1. During manufacturing, an inclined hole is formed in the bottom surface of the foundation pit, then the second reinforcement cage extends into the inclined hole, and then concrete above C25 is poured, so that the first end of the inclined pile 1 extends into the inclined hole to be fixed. And (3) extending the second end of the batter pile 1 out of the ground at the bottom of the foundation pit until the second end abuts against the top end of the side wall of the foundation pit. Set up crossbeam 3 at the second end of batter pile 1, set up a plurality of batter piles 1 and make the second end of a plurality of batter piles 1 all with crossbeam 3's lateral wall fixed connection. And one end of the cement mixing pile extending out of the slope top of the foundation pit is fixedly connected with the cross beam 3, so that the cement mixing pile is fixed with the inclined pile 1 to achieve the effect of supporting.

Wherein the batter pile 1 should enter into harder soil layers or rock layers to make the batter pile 1 more stable. The batter pile 1 may also be a steel pipe pile or a solid square pile.

As an optional implementation manner, in a specific embodiment of the present application, the first reinforcement cage and the second reinforcement cage are connected, and when the first concrete and the second concrete are poured, the first concrete and the second concrete are poured into a whole, so that the second ends of the oblique piles 1 are both fixedly connected to the side walls of the cross beam 3. The construction steps are saved, and the construction efficiency is improved.

A specific embodiment of the present application provides a foundation pit, including: the foundation pit supporting structure is any one of the above foundation pit supporting structures.

In the description of the present application, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In this application, the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" and the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.

Claims (10)

1. A foundation pit supporting structure is characterized by comprising an inclined pile (1), a straight pile (2) and a cross beam (3), wherein a first end of the inclined pile (1) extends into the bottom surface of a foundation pit to a hard soil layer, and a second end of the inclined pile (1) abuts against the top end of the side wall of the foundation pit; the vertical pile (2) stretches into the top of slope of the foundation pit, the batter pile (1) is provided with a plurality of, and a plurality of the equal fixed connection of second end of batter pile (1) is on crossbeam (3), the vertical pile (2) stretches out the top of slope of foundation pit one end with crossbeam (3) fixed connection.

2. The foundation pit supporting structure according to claim 1, wherein the vertical piles (2) are cement mixing piles which are arranged in plurality and transversely, and the cement mixing piles penetrate into the impervious bed.

3. The foundation pit supporting structure according to claim 2, wherein the cement mixing piles are arranged in two rows.

4. Foundation pit supporting construction according to claim 2, characterized in that an i-steel (5) is arranged in the cement mixing pile.

5. The foundation pit supporting structure according to claim 4, wherein the cross beam (3) and the vertical pile (2) are fixedly connected through a steel bar (4), one end of the steel bar (4) is fixedly connected with the cross beam (3), and the other end of the steel bar is fixedly connected with the I-shaped steel (5).

6. Foundation pit support structure according to claim 5, characterized in that there are several reinforcement bars (4).

7. The foundation pit supporting structure according to claim 5, wherein the cross beam (3) is formed by pouring a first reinforcement cage and first concrete, and one end of the reinforcement (4) is embedded in the concrete of the cross beam (3).

8. Foundation pit support structure according to claim 6, characterized in that the batter pile (1) is cast in with a second reinforcement cage and a second concrete.

9. The excavation supporting structure of claim 7, wherein the first concrete and the second concrete are poured in one piece.

10. A foundation pit, comprising: an excavation supporting structure, characterized in that the excavation supporting structure is an excavation supporting structure according to any one of claims 1 to 9.

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