CN212153403U - Foundation pit supporting structure - Google Patents

Abstract

The utility model relates to a foundation pit supporting structure, establish many miniature piles on the foundation pit lateral wall including the interval, establish the backplate that breaks ground on miniature pile, establish on miniature pile and be located the couple that presets at break ground backplate rear, the order with crossbeam and an at least stiffening beam that preset on many miniature piles couple and be connected, the both ends of stiffening beam push up respectively on two crossbeams that are located two foundation pit lateral walls respectively for make the crossbeam butt on the miniature pile adjacent with miniature pile. This application is used for the foundation ditch reinforcement, and is higher to the support intensity of foundation ditch lateral wall, can effectively reduce the deformation of foundation ditch lateral wall.

Description

Foundation pit supporting structure

Technical Field

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

Background

The foundation pit support is a supporting, blocking, reinforcing and protecting measure adopted for 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 existing foundation pit support is mostly reinforced at the position of a foundation pit wall, the strength and the shape of the foundation pit support can be changed along with the progress of the construction process, particularly, when the height of the support is high, one end of the support, which is far away from the bottom of a pit, can be inclined, and particularly, when the soil around the foundation pit is wet, the inclined degree can be increased more seriously.

Disclosure of Invention

To the not enough of prior art existence, the purpose of this application is to provide a foundation ditch supporting construction, and this supporting construction is higher to the support intensity of foundation ditch lateral wall, can effectively reduce the deformation of foundation ditch lateral wall.

The above object of the present application is achieved by the following technical solutions:

a foundation pit supporting structure comprising:

the miniature piles are arranged on the side wall of the foundation pit at intervals;

the soil breaking guard plate is arranged on the miniature pile;

the preset hook is arranged on the micro pile and is positioned behind the soil breaking guard plate;

the cross beam is sequentially connected with the preset hooks on the micro piles; and

and two ends of the at least one reinforcing beam are respectively propped against the two cross beams on the side walls of the two foundation pits and are used for enabling the cross beams to be abutted against the micro piles adjacent to the micro piles.

Through adopting above-mentioned technical scheme, many micropiles can be strutted the foundation ditch lateral wall in vertical direction, and the stiffening beam can exert a thrust through the crossbeam at its both ends to the micropile of being connected with the crossbeam, makes it have to the trend of being close to the motion of foundation ditch lateral wall, can improve the stability of micropile, reduces the possibility that the micropile takes place to incline, and then plays the effect that improves foundation ditch lateral wall stability.

In a preferred example of the present application: one end that lies in the backplate place ahead on the miniature stake is equipped with the part that breaks ground, in the direction of keeping away from the miniature stake, the sectional area of the part that breaks ground tends to reduce.

Through adopting above-mentioned technical scheme, the part of breaking ground can reduce the resistance when miniature stake drills into the underground, plays the effect that reduces the construction degree of difficulty.

In a preferred example of the present application: the preset hook is detachably connected to the miniature pile.

Through adopting above-mentioned technical scheme, can install preset the couple again with the micropile is squeezed into underground, avoid destroying the structure of preset couple in the in-process of squeezing into underground with the micropile.

In a preferred example of the present application: the micro pile comprises a steel pipe and a concrete column poured in the steel pipe.

Through adopting above-mentioned technical scheme, the steel pipe can enough act as the mould of pouring the in-process, can play the effect that improves miniature stake intensity again, even the concrete column emergence fracture inside the in-process steel pipe of pile, also can play the effect of strutting.

In a preferred example of the present application: hanging rings matched with the preset hooks are arranged on the cross beam at intervals and used for hanging the reinforcing beam on the micro pile.

Through adopting above-mentioned technical scheme, the crossbeam can directly hang on miniature pile through the link, and the installation rate is faster, and the construction degree of difficulty is also lower.

In a preferred example of the present application: the reinforcing beam comprises a main body part and an adjusting part connected with the main body part in a sliding way;

the main body part is provided with a first vertical plate, and the adjusting part is provided with a second vertical plate which is matched with and parallel to the first vertical plate;

when a pushing force is applied to the second vertical plate, the adjusting part can move towards the direction far away from the main body part.

Through adopting above-mentioned technical scheme to first riser is the basis, can be to the second riser add a thrust, makes adjustment portion move to the part of keeping away from the main part, can make adjustment portion direct butt on the crossbeam like this in the installation, increases the pressure between crossbeam and the adjustment portion, and then plays the effect that improves miniature stake stability.

In a preferred example of the present application: the number of the adjusting parts is two, and the adjusting parts are respectively arranged at two ends of the main body part.

In a preferred example of the present application: the number of the first vertical plates is two, the first vertical plates are respectively arranged at two ends of the main body part and are parallel to the second vertical plates adjacent to and matched with the first vertical plates.

Through adopting above-mentioned technical scheme, two first risers are located the both sides of main part respectively for promote respectively rather than adjacent adjustment part and remove, can operate adjustment part like this simultaneously, each other does not influence between the two, and work efficiency is higher.

To sum up, the beneficial technical effect of this application does:

1. many micro piles can be strutted foundation ditch lateral wall in vertical direction, and the stiffening beam can exert a thrust through the crossbeam at its both ends to the micro pile who is connected with the crossbeam, makes it have to the trend of being close to foundation ditch lateral wall motion, can improve micro pile's stability, reduces the possibility that micro pile takes place to incline, and then plays the effect that improves foundation ditch lateral wall stability.

2. The steel pipe can enough act as the mould of pouring in-process, can play the effect that improves miniature stake intensity again, even the concrete column emergence fracture inside the in-process steel pipe of pile, also can play the effect of strutting.

3. Based on first riser, can be to the second riser adding a thrust, make adjustment portion move to the part of keeping away from the main part, can make adjustment portion direct butt on the crossbeam like this in the installation, increase the pressure between crossbeam and the adjustment portion, and then play the effect that improves miniature stake stability.

Drawings

Fig. 1 is a schematic perspective view of an embodiment of the present application.

Fig. 2 is a partially enlarged schematic view of a portion a in fig. 1.

Fig. 3 is a schematic structural diagram of a micropile according to an embodiment of the present disclosure.

Fig. 4 is a schematic perspective view of another embodiment of the present disclosure.

Fig. 5 is a partially enlarged schematic view of a portion B in fig. 1.

Fig. 6 is a partially enlarged schematic view of a portion C in fig. 4.

Fig. 7 is a schematic view of the reinforcing beam according to the embodiment of the present application.

In the figure, 11, a micro pile, 12, a ground breaking protection plate, 13, a preset hook, 14, a cross beam, 15, a reinforcing beam, 111, a ground breaking part, 112, a steel pipe, 113, a concrete column, 141, a main body part, 142, an adjusting part, 143, a first vertical plate, 144, a second vertical plate, 151 and a hanging ring.

Detailed Description

Embodiments of the present application will be described in further detail below with reference to the accompanying drawings.

Referring to fig. 1 and 2, a supporting structure of a foundation pit disclosed in an embodiment of the present application is mainly composed of micro piles 11, a soil-breaking guard plate 12, a preset hook 13, a cross beam 14, a reinforcing beam 15, and the like, and will be further described below with reference to the foundation pit and an actual construction process.

The foundation ditch is a space that is located the below ground, comprises a bottom surface and a plurality of side, at first drives into the below ground with many miniature piles 11 order according to the construction drawing before the excavation, and the in-process of driving into, broken soil backplate 12 can at first contact with soil and push away its soil in the direction of advance in the in-process that removes, can play the effect of protection preset couple 13 like this, avoids it to appear damaging in the in-process of piling.

After all the micro piles 11 are driven, excavation of the ground is started, and the excavation is stopped until the cross beam 14 can be installed. At this time, one or more beams 14 are fixed on the preset hook 13, and the beams 14 can be directly placed on the preset hook 13 or fixed on the preset hook 13 by welding.

And then, installing one or more reinforcing beams 15, wherein the number of the reinforcing beams 15 is one, and when the reinforcing beams are installed, the two ends of the reinforcing beams are directly propped against the adjacent cross beams 14 and fixed in front of the two parallel cross beams 14, and the fixing mode can be welding, bolt connection or riveting and the like.

It should be understood that the welding is convenient to operate during the field construction, and the welding is preferred.

And after the reinforcing beam 15 is installed, continuously excavating the foundation pit until the excavation is finished.

When the micropiles 11 on both sides of the reinforcing beam 15 are inclined, the cross beam 14 connected with the reinforcing beam is pushed to incline towards the direction close to the reinforcing beam 15, but the inclination of the micropiles 11 can be limited within a very limited range because the existence of the reinforcing beam 15 can counteract the movement tendency.

Referring to fig. 3, as an embodiment of the foundation pit supporting structure provided by the application, a soil-breaking portion 111 is added to one end of the micro pile 11, and the shape of the soil-breaking portion 111 is conical, and specifically, the sectional area of the soil-breaking portion tends to decrease in a direction away from the micro pile 11. The soil-breaking portion 111 is located in front of the soil-breaking guard 12 and functions to reduce the advancing resistance of the micro-pile 11 during the piling process and shorten the piling time.

Referring to fig. 1 and 4, as a specific embodiment of the foundation pit supporting structure provided by the application, the preset hook 13 is detachably connected to the micro pile 11, that is, the preset hook 13 may be installed on the micro pile 11 after the pile driving is completed, and the connection mode may be a bolt connection or an insertion connection. The advantage of this connection is that structural damage to the pre-set hooks 13 during the piling process can be completely avoided, while in a possible environment of use, pre-set hooks 13 of different sizes can be replaced according to the size of the cross beam 14.

Referring to fig. 3, as a specific embodiment of the foundation pit supporting structure provided by the application, the micro pile 11 is composed of two parts, namely a steel pipe 112 and a concrete column 113 poured in the steel pipe 112, and the steel pipe 112 can serve as a mold in the pouring process, can bear the extrusion to the surrounding soil in the piling process, and can absorb a part of the vibration generated in the piling process to reduce the damage to the concrete column 113 therein.

The toughness of the steel pipe 112 is also good, and even if the concrete column 113 inside the steel pipe is broken, the micropile 11 can be used continuously without replacement.

Referring to fig. 4 and 5, as a specific embodiment of the foundation pit supporting structure provided by the application, a plurality of hanging rings 141 are arranged on the cross beam 14 at intervals, and the hanging rings 141 are used for being connected with the preset hooks 13 on the micro-piles 11, so that the cross beam 14 can be directly hung on the micro-piles 11 in the construction process, and the installation speed is higher.

Referring to fig. 6 and 7, as an embodiment of the supporting structure of the foundation pit, the reinforcing beam 15 is composed of a main body 151 and an adjustment portion 152, and the length of the main body 151 is greater than that of the adjustment portion 152.

The adjustment portion 152 is slidably connected to the main portion 151. in one possible installation process, the adjustment portion 152 can be pushed back a distance, the main portion 151 can be placed at a designated position, and then the adjustment portion 152 can be pushed to move toward the cross beam 14 until abutting against the cross beam 14.

A first vertical plate 153 and a second vertical plate 154 are respectively fixed on the main body part 151 and the adjusting part 152, the two vertical plates are used for providing an operation table for equipment such as a jack, in a possible operation process, the jack is placed between the first vertical plate 153 and the second vertical plate 154, the base of the jack is pressed on the first vertical plate 153, the plunger is pressed on the second vertical plate 154, in a rising process, the adjusting part 152 is pushed by the second vertical plate 154 to move towards a direction close to the cross beam 14 and the adjusting part 152 is tightly pressed on the cross beam 14, then the adjusting part 152 is directly welded on the main body part 151, and finally the jack is detached.

Further, the number of the adjusting portions 152 is two, and the two adjusting portions are respectively disposed at two ends of the main body portion 151, so that the two adjusting portions can be adjusted simultaneously during the adjusting process, thereby further improving the structural strength.

Furthermore, the number of the first vertical plates 153 is two, and the two first vertical plates 153 are respectively disposed at two ends of the main body 151, and each first vertical plate 153 is matched with the adjacent second vertical plate 154 to push the adjusting portion 152 where the second vertical plate 154 is located to move.

The embodiments of the present invention are preferred embodiments of the present application, and the scope of the present application is not limited by the embodiments of the present application, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (8)

1. A foundation pit supporting structure, comprising:

a plurality of micro piles (11) are arranged on the side wall of the foundation pit at intervals;

the soil breaking guard plate (12) is arranged on the miniature pile (11);

the preset hook (13) is arranged on the micro pile (11) and is positioned behind the soil breaking guard plate (12);

the cross beam (14) is sequentially connected with preset hooks (13) on the miniature piles (11); and

and two ends of the at least one reinforcing beam (15) are respectively propped against the two cross beams (14) respectively positioned on the side walls of the two foundation pits, so that the cross beams (14) are abutted against the micro piles (11) adjacent to the micro piles (11).

2. A foundation pit supporting construction according to claim 1, wherein: one end of the miniature pile (11) in front of the soil breaking guard plate (12) is provided with a soil breaking part (111), and the sectional area of the soil breaking part (111) tends to be reduced in the direction away from the miniature pile (11).

3. A foundation pit supporting construction according to claim 1, wherein: the preset hook (13) is detachably connected to the miniature pile (11).

4. A foundation pit supporting construction according to claim 1, wherein: the micro pile (11) comprises a steel pipe (112) and a concrete column (113) poured in the steel pipe (112).

5. A foundation pit supporting construction according to claim 1, wherein: hanging rings (141) matched with the preset hooks (13) are arranged on the cross beam (14) at intervals and used for hanging the reinforcing beam (15) on the micro pile (11).

6. A foundation pit supporting construction according to any one of claims 1 to 5, wherein: the reinforcing beam (15) comprises a main body part (151) and an adjusting part (152) connected with the main body part (151) in a sliding way;

a first vertical plate (153) is arranged on the main body part (151), and a second vertical plate (154) which is matched with and parallel to the first vertical plate (153) is arranged on the adjusting part (152);

when a pushing force is applied to the second vertical plate (154), the adjusting part (152) can move in a direction away from the main body part (151).

7. A foundation pit supporting construction according to claim 6, wherein: the number of the adjusting parts (152) is two, and the adjusting parts are respectively arranged at two ends of the main body part (151).

8. A foundation pit supporting construction according to claim 7, wherein: the number of the first vertical plates (153) is two, the first vertical plates are respectively arranged at two ends of the main body part (151) and are parallel to the second vertical plates (154) adjacent to and matched with the first vertical plates.

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