CN211395698U - Stiff core curtain pile and dado stake anchor combined supporting construction - Google Patents

Stiff core curtain pile and dado stake anchor combined supporting construction Download PDF

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Publication number
CN211395698U
CN211395698U CN201922090477.4U CN201922090477U CN211395698U CN 211395698 U CN211395698 U CN 211395698U CN 201922090477 U CN201922090477 U CN 201922090477U CN 211395698 U CN211395698 U CN 211395698U
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pile
stagnant water
core
water curtain
curtain
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CN201922090477.4U
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Inventor
贾金青
王子怡
高幸
陈进杰
张丽华
周同和
朱彦鹏
王旭春
廖小平
杨敏
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Dalian University of Technology
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Dalian University of Technology
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Abstract

The utility model discloses a strength core curtain stake and dado stake anchor combined supporting structure, including concrete filling pile and stagnant water curtain, the stagnant water curtain is high-pressure jet grouting pile stagnant water curtain, and the shaped steel strength core is squeezed into stagnant water curtain along the axis and is formed strength core stagnant water curtain, and strength core stagnant water curtain and concrete filling pile interval arrangement and mutual interlock are arranged into the straight line, and the crown beam links into whole with concrete filling pile and strength core stagnant water curtain, and the waist rail of concrete filling pile are connected, and the prestressed anchorage pole is installed on the waist rail between two adjacent concrete filling piles. The utility model discloses accord with supporting construction's atress characteristics, satisfy under the prerequisite of stagnant water, the intensity of make full use of strength core stagnant water curtain increases composite pile supporting construction rigidity and intensity, can control the foundation ditch lateral wall better and warp, under the equal degree of depth foundation ditch condition, more save material, but recovery used repeatedly of shaped steel strength core, reduce cost avoids shaped steel strength core to stay and causes underground space pollution in the underground.

Description

Stiff core curtain pile and dado stake anchor combined supporting construction
Technical Field
The utility model relates to a foundation ditch support field under the abundant condition of groundwater, concretely relates to strength core curtain stake and dado stake anchor combined supporting structure.
Background
In engineering practice, in order to ensure the safety of the underground structure construction and the surrounding environment of the foundation pit, a foundation pit supporting structure is often adopted to support, reinforce and protect the side wall of the foundation pit and the surrounding environment. During excavation of the foundation pit, unloading enables the soil pressures of the supporting structure on the inner side and the outer side of the foundation pit to form pressure difference, and therefore lateral deformation of the supporting structure is caused. Therefore, the limit of the lateral displacement has important significance for foundation pit excavation and the surrounding environment.
Under the condition of complex stratum, particularly under the condition of weak stratum and abundant underground water, a supporting method of pile anchors and a waterproof curtain is generally adopted, a high-pressure jet grouting pile adopted by the waterproof curtain only plays a waterproof role, and the self strength of the waterproof curtain is not fully utilized.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, an object of the present invention is to provide a stiff core curtain pile and retaining wall pile anchor combined supporting structure, which improves the bearing capacity of the self on the premise of realizing effective water stop of the side wall of the foundation pit.
In order to achieve the above object, the present invention provides the following technical solutions:
the utility model provides a strength core curtain stake and dado stake anchor combined supporting structure, includes concrete bored concrete pile, stagnant water curtain, shaped steel strength core and crown beam, the stagnant water curtain is high-pressure jet grouting pile stagnant water curtain, shaped steel strength core is squeezed into stagnant water curtain along the axis and is formed strength core stagnant water curtain, strength core stagnant water curtain and concrete bored concrete pile interval are arranged and mutual interlock is arranged into the straight line, the crown beam is connected concrete bored concrete pile and strength core stagnant water curtain into whole, the waist and the waist roof beam of concrete bored concrete pile are connected, and the prestressed anchorage pole is installed on the waist roof beam between two adjacent concrete bored concrete piles, and the outer end and the anchorage device of prestressed anchorage pole are fixed.
After underground construction is finished, in order to conveniently pull out the section steel stiffening core, the bottom of the section steel stiffening core is driven into a watertight layer, and the top end of the section steel stiffening core is higher than the designed elevation of the crown beam; furthermore, 1.0-2.0cm of foam is pasted at the flange and the web plate where the section steel stiffening core and the crown beam are connected by glue, so that the crown beam and the section steel stiffening core are disconnected when the section steel stiffening core is pulled out, and the section steel stiffening core is conveniently pulled out without damaging the crown beam. The pollution of underground space caused by the steel reinforced core staying underground is avoided, and social resources can be saved. After the underground construction is finished, the part of the crown beam with the steel reinforced core higher than the top beam is clamped by a small machine tool, and the steel reinforced core is pulled out under the condition of not damaging the crown beam 4.
The section steel stiffening core is I-shaped steel, a steel pipe or H-shaped steel, and can also adopt a tubular structure or other solid strip-shaped structures.
The utility model has the advantages that:
1) increase the intensity and the rigidity of supporting construction: by additionally arranging the section steel stiffening core in the waterproof curtain pile, the bending rigidity and the shearing strength of the whole supporting structure are enhanced under the condition of meeting the water stopping condition, so that the rigidity and the strength of the supporting structure are higher. Compared with the prior art, the device can support and block larger water pressure and soil pressure and better control the deformation of the side wall of the foundation pit. The waterproof curtain is only higher than the underground water level, so that materials are saved on the premise of meeting the waterproof requirement, and the waterproof curtain has a reinforcing effect on the position with higher soil pressure.
2) The stiffening core waterproof curtain and the concrete cast-in-place pile are arranged at intervals and mutually meshed and arranged into a straight line, the cast-in-place pile and the pile interval thereof are reasonably utilized, the waterproof curtain and the cast-in-place pile are combined and transversely arranged, and the waterproof effect is achieved. Compared with the construction method of independently driving a row of waterproof curtains, the construction method saves materials and construction cost to a certain extent.
3) The steel reinforced core can be recovered: and adhering foam to the top end of the steel stiffening core and the flange and web plate connected with the crown beam by using glue so as to separate the stiffening core from the crown beam. After construction is completed, the stiffening core can be separated from the crown beam through a small machine tool and pulled out of the supporting structure. The steel reinforced core can be recycled, social resources are saved, and cost is reduced. And the stiff core is prevented from remaining underground to cause pollution of underground space.
4) Construction convenience saves the cost: when the supporting structure needs to bear larger water pressure and soil pressure, the strength and rigidity of the pile are often improved by enlarging the diameter of the pile or increasing the supporting structure. The utility model discloses an insert I-steel strength core when stagnant water curtain pile body has not become hard yet, make the intensity of stagnant water curtain obtain make full use of, more save material under equal degree of depth foundation ditch condition, and construction convenience is swift.
Drawings
Fig. 1 is the side structure schematic diagram of the combined pile supporting structure of the present invention.
FIG. 2 is a schematic top view of a double waterproof curtain pile.
FIG. 3 is a schematic view of a top view of a single waterproof curtain pile.
Fig. 4 is a schematic view of the connection between the i-steel stiffened core and the crown beam.
The reference numbers in the figures are: 1. the concrete waterproof curtain wall comprises concrete cast-in-place piles, 2 waterproof curtains, 3 section steel stiffened cores, 4 crown beams, 5 concrete surface layers, 6 waist beams, 7 prestressed anchor rods, 8 foam plates and 9 adhesives.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
Example 1
As shown in fig. 1-4, a stiff core curtain pile and retaining wall pile anchor combined supporting structure comprises a concrete cast-in-place pile 1, a waterproof curtain 2, a profile steel stiff core 3 and a crown beam 4, wherein the waterproof curtain 2 is a high-pressure jet grouting pile waterproof curtain, the profile steel stiff core 3 is driven into the waterproof curtain 2 along an axis to form the stiff core waterproof curtain, the stiff core waterproof curtain and the concrete cast-in-place pile are arranged at intervals and mutually meshed to form a straight line, 1-2 high-pressure jet grouting piles are arranged between adjacent concrete cast-in-place piles 1 according to a pile spacing, the crown beam 4 connects the concrete cast-in-place pile 1 and the stiff core waterproof curtain into a whole, the waist of the concrete cast-in-place pile 1 is connected with a waist beam 6, a prestressed anchor rod 7 is installed on the waist beam 6 between two adjacent concrete cast-in-place piles 1, and the prestressed anchor rod 7 is fixed with an anchorage device; the bottom of the high-pressure jet grouting pile is driven into a water stop layer, and the pile top is lower than the pile top of the concrete cast-in-place pile 1 but higher than the underground water level; the waterproof layer is driven into the bottom of the section steel stiffening core 3, the top end of the section steel stiffening core is 10-15cm higher than the designed elevation of the crown beam 4, and the foam board 8 with the thickness of 1.0-2.0cm is pasted on the flange and the web plate where the section steel stiffening core 3 and the crown beam 4 are connected through the adhesive 9, so that the stiffening core can be conveniently pulled out without damaging the crown beam 4 after underground construction is finished. The pollution of underground space caused by the steel reinforced core 3 left underground is avoided, and social resources can be saved.
The specific construction method comprises the following steps:
A. forming holes on site by using machines such as a spiral rotating machine and the like, then, laying a reinforcement cage and pouring concrete;
B. the construction of a waterproof curtain 2 is carried out by taking common cement-water glass as a grouting material, the waterproof curtain 2 is constructed by adopting high-pressure injection grouting equipment and is positioned between the cast-in-place concrete piles, and the pile diameter of the high-pressure jet grouting pile is smaller than that of the cast-in-place concrete pile 1;
C. coating an antifriction agent on the outer surface of the section steel stiffening core 3, and driving the section steel stiffening core 3 along the axis before the pile body of the high-pressure jet grouting pile is hardened;
D. and arranging a crown beam 4, connecting the concrete cast-in-place pile 1 and the stiffening core waterproof curtain into a whole, wherein the pile top of the concrete cast-in-place pile 1 is connected with the crown beam 4, and the pile top of the concrete cast-in-place pile 1 is embedded and fixed to limit the lateral displacement of the foundation pit wall.
E. After the concrete cast-in-place pile 1 and the high-pressure jet grouting pile reach certain strength, performing first-step foundation pit excavation, excavating 1.5-3.0m downwards from the ground, then obliquely downwards turning the hole towards the soil-facing surface, putting a rod body of the prestressed anchor rod 7 into the hole and grouting, arranging a reinforcing mesh when spraying a concrete surface layer to 1/2 thickness on the surface of the side wall of the foundation pit, then fixing the waist beam 6 on the concrete cast-in-place pile 1, fixing the prestressed anchor rod 7 on the waist beam 6, and spraying concrete to the designed thickness to form a concrete surface layer 5;
F. after the prestressed anchor grouting and the concrete surface 5 reach a certain strength, repeating the process until reaching the base;
G. and 3, recovery construction process of the section steel stiffened core: after the underground construction is finished, the part of the crown beam 4 with the steel reinforced core 3 higher is clamped by a small machine tool, and the steel reinforced core 3 is pulled out under the condition of not damaging the crown beam 4.
The section steel stiffening core 3 is I-shaped steel.

Claims (4)

1. The utility model provides a strength core curtain stake and dado stake anchor combined supporting construction which characterized in that: including concrete bored concrete pile (1), stagnant water curtain (2), shaped steel strength core (3) and guan liang (4), stagnant water curtain (2) are high-pressure jet grouting pile stagnant water curtain, shaped steel strength core (3) are squeezed into stagnant water curtain (2) along the axis and are formed strength core stagnant water curtain, strength core stagnant water curtain and concrete bored concrete pile (1) interval arrangement and mutual interlock are arranged into the straight line, guan liang (4) are connected concrete bored concrete pile (1) and strength core stagnant water curtain into whole, the waist and the girt (6) of concrete bored concrete pile (1) are connected, and prestressed anchorage pole (7) are installed on girt (6) between two adjacent concrete bored concrete piles (1), and the outer end and the ground tackle of prestressed anchorage pole (7) are fixed.
2. The combined supporting structure of a stiff core curtain pile and a retaining wall pile anchor as claimed in claim 1, wherein: the bottom of the high-pressure jet grouting pile is driven into a waterproof layer, and the pile top of the high-pressure jet grouting pile is lower than the pile top of the concrete cast-in-place pile (1) but higher than the underground water line.
3. The combined supporting structure of a stiff core curtain pile and a retaining wall pile anchor as claimed in claim 1, wherein: the bottom of the section steel stiffening core (3) is driven into the impervious bed, and the top end is higher than the designed elevation of the crown beam (4).
4. A stiff core curtain pile and retaining wall pile anchor combined supporting structure as claimed in claim 3, wherein: and (3) adhering 1.0-2.0cm foam plates (8) to the flanges and webs where the section steel stiffening core (3) and the crown beam (4) are connected by using adhesives (9).
CN201922090477.4U 2019-11-28 2019-11-28 Stiff core curtain pile and dado stake anchor combined supporting construction Active CN211395698U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201922090477.4U CN211395698U (en) 2019-11-28 2019-11-28 Stiff core curtain pile and dado stake anchor combined supporting construction

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201922090477.4U CN211395698U (en) 2019-11-28 2019-11-28 Stiff core curtain pile and dado stake anchor combined supporting construction

Publications (1)

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CN211395698U true CN211395698U (en) 2020-09-01

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112095588A (en) * 2020-09-22 2020-12-18 上海市基础工程集团有限公司 Section steel or steel pipe cast-in-situ bored pile and construction method thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112095588A (en) * 2020-09-22 2020-12-18 上海市基础工程集团有限公司 Section steel or steel pipe cast-in-situ bored pile and construction method thereof

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