CN211340742U

CN211340742U - Anti-settlement foundation

Info

Publication number: CN211340742U
Application number: CN201921771812.0U
Authority: CN
Inventors: 于建军; 井文奇
Original assignee: Shaanxi Shenzhou Industry Co ltd
Current assignee: Shaanxi Shenzhou Industry Co ltd
Priority date: 2019-10-21
Filing date: 2019-10-21
Publication date: 2020-08-25
Anticipated expiration: 2029-10-21

Abstract

The utility model relates to an anti ground that subsides relates to the technical field of foundation structure, aims at solving the relatively poor problem of bearing capacity that the concrete pile post in the ground leads to owing to shrink in arid soil. The concrete surface layer is arranged on the tamping layer, covers the top end of each pile and is integrally poured with each pile, and a flow guide structure for guiding concrete slurry or cement slurry into the side wall of the pile hole is arranged on each pile. The utility model discloses have and show the beneficial effect who improves the bearing capacity of foundation on the arid area soft soil.

Description

Anti-settlement foundation

Technical Field

The utility model belongs to the technical field of the technique of foundation structure and specifically relates to an anti ground that subsides is related to.

Background

The existing pile foundation reinforced foundation is mainly reinforced by miniature piles, the diameter of a pile body is not more than 300mm, and the foundation soil and the piles commonly bear upper load according to the design of a composite foundation. However, in arid areas with low water content of soil, the water in the concrete is absorbed by the soil in the curing process after the pile body is poured, so that the pile body and the surrounding soil layer cannot be tightly combined, the side frictional resistance of the pile body is difficult to exert, and the bearing capacity of the foundation is obviously reduced.

The invention with the publication number of CN105040720A discloses an anti-settling foundation structure, which comprises a foundation pile structure and a pile plate structure arranged on the foundation pile structure, wherein the pile plate structure comprises a plurality of pile plates, each pile plate comprises a pile plate main body and an end hidden beam arranged at the end part of the pile plate main body, the pile plate main body comprises a plurality of transverse hidden beams and longitudinal hidden beams, adjacent pile plates are arranged at intervals to form an inter-pile-plate expansion joint, the foundation pile structure comprises a plurality of pile plate supporting foundation pile components arranged below the pile plate main body and a plurality of pile plate gap supporting foundation pile components arranged below the inter-pile-plate expansion joint and the end hidden beam, the pile plate supporting foundation pile components comprise a plurality of foundation piles and a plurality of pile caps correspondingly arranged at the top ends of the foundation piles, the pile plate gap supporting foundation pile components comprise cover beams arranged between the expansion joints and below the end hidden beams, and a plurality of foundation piles arranged below the cover beam, wherein the foundation piles are rock-socketed piles, and the bottom ends of the foundation piles enter the strongly weathered rock stratum or the moderately weathered rock stratum.

The invention can avoid the settlement of the foundation structure by increasing the depth of the foundation structure and the strength of the reinforced foundation structure.

However, the foundation settlement is avoided by increasing the depth of the foundation structure, so that the construction cost is increased, the construction difficulty is increased, and if the problem of shrinkage of the concrete pile in the dry soil cannot be solved fundamentally, the bearing capacity of the foundation is still difficult to be improved greatly.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an anti ground that subsides, it has the beneficial effect that is showing the bearing capacity that improves the ground on the arid area soft soil.

The above utility model discloses an above-mentioned utility model purpose can realize through following technical scheme:

the utility model provides an anti foundation that subsides, includes the tamp layer, locate tamp intraformational pile hole, pour in the downthehole stake of stake with locate the inside steel reinforcement cage of stake, be equipped with the concrete surface course on the tamp layer, the concrete surface course covers each the top of stake, and with each the integrative pouring of stake, be equipped with on the stake with concrete slurry or cement slurry leading-in to the water conservancy diversion structure in the pile hole lateral wall.

By adopting the technical scheme, the bearing capacity of the foundation base part is improved by the tamping layer formed by tamping the foundation, and the foundation base part is prevented from being soft and sinking; the arrangement that the reinforcement cage is poured in the concrete pile makes the pile have higher compression resistance, tensile resistance, bending resistance and toppling resistance, and the bearing capacity of the pile is stronger; the concrete surface layer connects the piles into a whole from the upper part, when the foundation is stressed, the concrete surface layer not only can support the piles, but also can distribute the force to the soil layer among the piles, thereby further improving the bearing capacity of the foundation and preventing the foundation from sinking; the diversion structure guides concrete grout or cement grout to the side of the pile to supplement the phenomena of reducing diameter and the like caused by water absorption in the solidification process of the pile, increase the friction force between the pile and the soil and further improve the integral bearing capacity of the foundation.

The utility model discloses further set up to: the flow guide structure comprises an overflow pipe vertically poured on the side wall of the pile, and an overflow hole is formed in one side, far away from the side wall of the pile, of the overflow pipe.

Through adopting above-mentioned technical scheme, insert the overflow pipe along the lateral wall of stake before stake concrete initial set, it is even as an organic whole after making one side that the overflow pipe does not have the overflow hole solidify with the stake lateral wall, the opposite side is just to the soil of stake downthehole wall, treat concrete stake solidification back, pour into concrete thick liquid or cement thick liquid into to the intraductal high pressure of overflow, make concrete thick liquid or cement thick liquid flow down along the overflow pipe, and extrude from the overflow hole under the high pressure and infiltrate in the stake downthehole wall, after concrete thick liquid or cement thick liquid solidify in the overflow pipe, support into the stake downthehole with hard form, increase the frictional force between stake and the stake hole, prevent that the stake from taking place to sink, increase the holistic bearing capacity of ground.

The utility model discloses further set up to: a plurality of reinforcing protrusions are arranged on one side, close to the pile, of the overflow pipe, and the reinforcing protrusions are poured inside the pile.

Through adopting above-mentioned technical scheme, after concrete dress post solidifies, consolidate protruding by concrete surround and combine into an organic whole with the stake, strengthened the compactness that combines between overflow pipe and the dress post, guaranteed that the overflow pipe can be with the stake atress together when the stake receives the holding down force, avoid taking place to drop between overflow pipe and the stake.

The utility model discloses further set up to: the overflow hole is hinged with a separation blade, the separation blade is connected with the lower end of the overflow hole through a torsional spring, and the separation blade is driven to cling to the overflow hole under the natural state of the torsional spring.

By adopting the technical scheme, when the overflow pipe is inserted downwards from the side wall of the pile before the initial setting of the pile, the blocking piece covers the overflow hole, so that the situation that the bottom soil flows into the overflow hole of the overflow pipe is avoided; when high pressure pours into concrete thick liquid or cement thick liquid into the overflow pipe, concrete thick liquid or cement thick liquid impact apron for the apron is rotatory open along articulated position, squeezes into concrete thick liquid or cement thick liquid into stake hole soil, avoids soil to block up the overflow hole.

The utility model discloses further set up to: the steel reinforcement cage includes a plurality of edges the axial of stake is arranged into annular main muscle, is located the annular that main muscle encloses and with each the stirrup of main muscle cross spot welding, the water conservancy diversion structure is including locating the outside slip casting pipe of steel reinforcement cage, slip casting pipe spiral is fixed in the outside of steel reinforcement cage, the slip casting pipe is kept away from the water conservancy diversion hole has been seted up to one side of steel reinforcement cage.

By adopting the technical scheme, the grouting pipes are placed into the pile holes along with the placement of the reinforcement cage, personnel can add water into the pile in the initial setting process of the pile to supplement the water absorbed by the soil, reduce the shrinkage and hole collapse phenomena of the pile, and can also add concrete grout or cement grout into the concrete pile through the grouting pipes to supplement the shrinkage generated in the concrete pile, thereby increasing the friction force between the side wall of the pile and the inner wall of the pile hole. After being injected from the grouting pipe, water or cement paste flows out of the grouting hole, the outflow direction of the water flow or the cement paste faces the side wall of the concrete pile, and the position of the water or the cement paste after flowing out is closer to the junction of the concrete pile and the soil, so that the diameter shrinkage phenomenon of the pile is reduced, and the bearing capacity of the pile is improved.

The utility model discloses further set up to: the grouting pipe is connected to the main rib in a spot welding mode, and is bound at the intersection of the stirrup and the main rib.

Through adopting above-mentioned technical scheme, the steel reinforcement cage is surroundd from the outside to the slip casting pipe when playing the slip casting effect, further plays the effect of fixed steel reinforcement cage, prevents the scattering of steel reinforcement cage, and simultaneously, consolidate each other and the restriction between steel reinforcement cage and the slip casting pipe, has guaranteed the intensity and the stability of whole stake structure.

The utility model discloses further set up to: the upper end of the main rib is folded in a divergent shape towards the periphery, and the folded end is positioned in the concrete surface layer.

Through adopting above-mentioned technical scheme, the main muscle of rolling up is fixed in the concrete surface course to be in the same place stake and the inseparabler combination of concrete surface course, avoid appearing breaking away from between stake pressurized back and the concrete surface course, simultaneously, the part that the main muscle was rolled up also can say that pressure acts on the soil top at stake edge, reaches the purpose of supporting the stake, has increased the actual stress area of ground, and the ground bearing capacity is better.

The utility model discloses further set up to: and a blocking rib is poured in the concrete surface layer and spans the top ends of the pile columns.

By adopting the technical scheme, the blocking ribs not only enhance the strength of the concrete surface layer, but also connect all the piles together with the concrete surface layer, so that the overall stress of the piles forming the foundation is guaranteed, and the local subsidence of the foundation is avoided.

The utility model discloses further set up to: and a brick and tile crushed stone layer and a flat top layer are also arranged on the concrete surface layer.

Through adopting above-mentioned technical scheme, the water-retaining ability of brick and tile gravel layer is stronger, sets up it in the ground basic unit, and when arid area precipitation, groundwater is locked in the ground by brick and tile gravel layer, and it is loose to have reduced the drying of soil in the ground, has strengthened the anti settlement ability of ground.

To sum up, the utility model discloses a beneficial technological effect does:

1. by arranging the concrete surface layer above the piles, the concrete surface layer connects the piles into a whole from the upper part of the piles, when the foundation is stressed, the foundation can be supported by the piles, and the force can be distributed to soil layers among the piles, so that the bearing capacity of the foundation is improved, and the foundation is prevented from sinking;

2. by arranging the flow guide structure, the flow guide structure guides concrete slurry or cement slurry to the side of the pile, compensates the phenomena of reducing diameter and the like caused by the absorption of moisture in the solidification process of the pile, increases the friction force between the pile and the soil, and further improves the integral bearing capacity of the foundation;

3. the brick and tile crushed stone layer locks underground water in the brick and tile crushed stone layer, so that the drying and loosening of soil in the foundation are reduced, and the anti-settling capacity of the foundation is enhanced.

Drawings

Fig. 1 is a schematic sectional view of an anti-settling foundation according to an embodiment of the present invention.

Fig. 2 is a schematic structural view of a pile and a flow guiding structure in the embodiment of fig. 1.

Fig. 3 is an enlarged schematic view of a portion a of fig. 2.

Fig. 4 is a schematic view of a reinforcement cage and a flow guiding structure in an anti-settling foundation disclosed in the second embodiment of the present invention.

In the figure, 1, a rammed layer; 2. pile columns; 3. a reinforcement cage; 31. a main rib; 32. hooping; 4. a concrete facing; 5. blocking ribs; 6. a brick and tile crushed stone layer; 7. leveling the top layer; 8. a flow guide structure; 81. an overflow pipe; 811. an overflow aperture; 812. a baffle plate; 813. a torsion spring; 814. reinforcing the protrusion; 82. a grouting pipe; 821. and (4) flow guide holes.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Example one

Referring to fig. 1 and 2, in order to disclose an anti-settlement foundation of the present invention, including rammed layer 1, dig in the pile hole in rammed layer 1, pile 2 poured in the pile hole and pour the reinforcement cage 3 in the pile 2 inside at the same time, the reinforcement cage 3 includes a plurality of main reinforcement 31 arranged into a ring along the axial direction of pile 2, the stirrup 32 located in the ring surrounded by main reinforcement 31 and spot welded with each main reinforcement 31 alternately; be provided with concrete surface course 4 on ramming layer 1, concrete surface course 4 covers the top of each stake 2, and pour with each 2 an organic whole stakes, 31 upper ends of main muscle are to dispersing the form all around and roll up, the end of rolling up is located concrete surface course 4, fender muscle 5 has still been pour in the concrete surface course 4, keep off the top setting that muscle 5 spaned a plurality of stakes 2, keep off muscle 5 and not only strengthened concrete surface course 4's intensity, and link each stake 2 as an organic wholely with concrete surface course 4 together, guarantee to constitute the whole atress of the stake 2 of ground, avoid the ground part to sink.

Referring to fig. 1, concrete surface course 4 top still is provided with brick and tile rubble layer 6 and flat top layer 7, brick and tile rubble layer 6 is under, the leveling layer is last, brick and tile rubble layer 6 comprises old and useless brick and tile rubble in the building rubbish, level top layer 7 and be sand layer, a gap for filling brick and tile rubble layer 6, brick and tile rubble layer 6's water-holding capacity is stronger, when arid area precipitation, groundwater is locked in the ground by brick and tile rubble layer 6, the dry loose of soil in the ground has been reduced, the anti settlement capability of ground has been strengthened, and simultaneously, make building rubbish obtain effective utilization.

In order to prevent the pile 2 from sinking caused by small friction in a dry soil layer, the pile 2 is provided with a flow guide structure 8 for guiding concrete slurry or cement slurry into the side wall of the pile hole.

Referring to fig. 1 and 2, the utility model discloses water conservancy diversion structure 8 in this embodiment includes vertical overflow pipe 81 of pouring on pile 2 lateral wall, and overflow pipe 81 is half in pile 2, and second half is in the stake hole lateral wall, and one side that pile 2 lateral wall was kept away from to overflow pipe 81 is provided with overflow hole 811, and it has separation blade 812 to articulate on the overflow hole 811, and separation blade 812 adopts torsional spring 813 to be connected with overflow hole 811 lower extreme, and torsional spring 813 natural state drives separation blade 812 and hugs closely on overflow hole 811 down. When the overflow pipe 81 is inserted downwards from the side wall of the pile 2 before the initial setting of the pile 2, the blocking piece 812 covers the overflow hole 811, so that the situation that the bottom soil flows into the overflow hole 811 on the overflow pipe 81 is avoided; when concrete grout or cement grout is poured into the overflow pipe 81 under high pressure, the cover plate is impacted by the concrete grout or the cement grout, so that the cover plate is opened along the rotation of the hinged position, the concrete grout or the cement grout is driven into pile hole soil, and the overflow hole 811 is prevented from being blocked by the soil.

Meanwhile, in order to make the pile 2 and the overflow pipe 81 more tightly combined, one side of the overflow pipe 81 close to the pile 2 is provided with a plurality of reinforcing protrusions 814, and the reinforcing protrusions 814 are poured inside the pile 2. After the concrete is solidified, the reinforcing protrusion 814 is surrounded by the concrete and is combined with the pile 2 into a whole, so that the tightness of the combination between the overflow pipe 81 and the pile is enhanced, the overflow pipe 81 can be stressed together with the pile 2 when the pile 2 is subjected to downward pressure, and the overflow pipe 81 and the pile 2 are prevented from falling off.

The utility model discloses the work progress of the anti foundation that subsides that this embodiment reveals does: firstly, excavating a foundation pit, pouring water at the bottom of the foundation pit to ensure that a drawing at the bottom of the foundation pit becomes wet and is easy to adhere, then tamping the bottom of the foundation pit to ensure that a soil layer at the bottom of the foundation pit is more compact, then drilling a pile hole on a tamped layer 1, embedding a reinforcement cage 3, and pouring concrete in the pile hole, before the concrete layer forming a pile 2 is initially set, vertically and downwards inserting a plurality of overflow pipes 81 from the side wall of the pile 2, so that one side of the overflow pipe 81, which is not provided with an overflow hole 811, is connected with the side wall of the pile 2 into a whole after being set, and the other side of the overflow pipe is opposite to the soil on the inner; after the concrete pile 2 is solidified, concrete grout or cement grout is injected into the overflow pipe 81 at high pressure, so that the concrete grout or the cement grout flows down along the overflow pipe 81 and is extruded from the overflow hole 811 at high pressure to permeate into the side wall of the pile hole, after the concrete grout or the cement grout in the overflow pipe 81 is solidified, the concrete grout or the cement grout is propped into the pile hole in a hard form, the friction force between the pile 2 and the pile hole is increased, the pile 2 is prevented from sinking, and the integral bearing capacity of the foundation is increased.

The utility model discloses the implementation principle of this embodiment does: the arrangement that the reinforcement cage 3 is poured in the concrete pile 2 enables the pile 2 to have higher compression resistance, tensile resistance, bending resistance and toppling resistance, and the bearing capacity of the pile 2 is stronger; the concrete surface layer 4 connects the piles 2 into a whole from the upper part, when the foundation is stressed, the concrete surface layer not only can support the piles 2, but also can distribute the force to the soil layers among the piles 2, so that the bearing capacity of the foundation is further improved, and the foundation is prevented from sinking; the diversion structure 8 guides concrete grout or cement grout to the side of the pile 2, supplements the phenomena of reducing diameter and the like caused by water absorption in the solidification process of the pile 2, increases the friction force between the pile 2 and soil, and further improves the integral bearing capacity of the foundation.

Example two

Referring to fig. 4, the anti-settling foundation disclosed in this embodiment of the present invention is substantially the same as the embodiment, and the difference lies in that the concrete arrangement of the diversion structure 8 is different, specifically: the water conservancy diversion structure 8 is including around locating the outside slip casting pipe 82 of steel reinforcement cage 3, and slip casting pipe 82 spiral fastening is in the outside of steel reinforcement cage 3, and slip casting pipe 82 adopts the mode of spot welding to connect on main muscle 31 to carry out the ligature to slip casting pipe 82 at stirrup 32 and main muscle 31's intersection, the water conservancy diversion hole 821 has been seted up to one side that the steel reinforcement cage 3 was kept away from to slip casting pipe 82.

The utility model discloses the implementation principle who is victory this moment does: the grouting pipe 82 is put into the pile hole along with the putting of the reinforcement cage 3, so that a person can add water into the pile 2 in the initial setting process of the pile 2 to supplement the water absorbed by the soil, and reduce the phenomena of reducing diameter and hole collapse of the pile 2, and the person can also add concrete grout or cement grout into the concrete pile 2 through the grouting pipe 82 to supplement the reducing diameter generated in the concrete pile 2, so that the friction force between the side wall of the pile 2 and the inner wall of the pile hole is increased. After being injected from the grouting pipe 82, water or cement paste flows out of the grouting hole, the outflow direction of the water flow or the cement paste faces the side wall of the concrete pile 2, and the position of the water or the cement paste after flowing out is closer to the junction of the concrete pile 2 and the soil, so that the reducing phenomenon of the pile 2 is more favorably reduced, and the bearing capacity of the pile 2 is improved.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. The utility model provides an anti foundation that subsides, includes tamp layer (1), locates stake hole in tamp layer (1), pour in stake (2) in the stake hole with locate inside steel reinforcement cage (3) of stake (2), its characterized in that: be equipped with concrete surface course (4) on ramming layer (1), concrete surface course (4) cover each the top of stake (2), and with each stake (2) integrative the pouring, be equipped with on stake (2) with concrete grout or cement grout leading-in to water conservancy diversion structure (8) in the stake hole lateral wall.

2. The anti-settling foundation as claimed in claim 1, wherein: the flow guide structure (8) comprises an overflow pipe (81) vertically poured on the side wall of the pile (2), and an overflow hole (811) is formed in one side, far away from the side wall of the pile (2), of the overflow pipe (81).

3. A settlement-resistant foundation as claimed in claim 2, wherein: a plurality of reinforcing protrusions (814) are arranged on one side, close to the pile (2), of the overflow pipe (81), and the reinforcing protrusions (814) are poured inside the pile (2).

4. A settlement-resistant foundation as claimed in claim 2, wherein: the overflow hole (811) is hinged with a baffle plate (812), the baffle plate (812) is connected with the lower end of the overflow hole (811) by a torsion spring (813), and the torsion spring (813) drives the baffle plate (812) to cling to the overflow hole (811) in a natural state.

5. The anti-settling foundation as claimed in claim 1, wherein: reinforcement cage (3) include a plurality of edges pile (2) axial arrange into annular main muscle (31), be located the annular that main muscle (31) enclose and with each stirrup (32) of main muscle (31) cross spot welding, water conservancy diversion structure (8) are including locating reinforcement cage (3) outside slip casting pipe (82), slip casting pipe (82) spiral fixation in the outside of reinforcement cage (3), slip casting pipe (82) are kept away from water conservancy diversion hole (821) have been seted up to one side of reinforcement cage (3).

6. An anti-settling foundation as claimed in claim 5, wherein: the grouting pipe (82) is connected to the main rib (31) in a spot welding mode, and the grouting pipe (82) is bound at the intersection of the stirrup (32) and the main rib (31).

7. An anti-settling foundation as claimed in claim 5, wherein: the upper ends of the main ribs (31) are folded in a divergent shape towards the periphery, and the folded ends are positioned in the concrete surface layer (4).

8. The anti-settling foundation as claimed in claim 1, wherein: and a blocking rib (5) is poured in the concrete surface layer (4), and the blocking rib (5) spans the top ends of the pile columns (2).

9. The anti-settling foundation as claimed in claim 1, wherein: and a brick and tile crushed stone layer (6) and a flat top layer (7) are also arranged on the concrete surface layer (4).