CN212612520U - Combined type inclined pile anchor rod foundation pit supporting system - Google Patents
Combined type inclined pile anchor rod foundation pit supporting system Download PDFInfo
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- CN212612520U CN212612520U CN202021508927.3U CN202021508927U CN212612520U CN 212612520 U CN212612520 U CN 212612520U CN 202021508927 U CN202021508927 U CN 202021508927U CN 212612520 U CN212612520 U CN 212612520U
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Abstract
The utility model discloses a modular batter pile stock excavation supporting system belongs to excavation supporting technical field, supporting system is including following several kinds of supporting construction: combining the inclined and straight alternating piles with anchor rods; the monocline support piles are combined with anchor rods; the double-inclined supporting piles are combined with anchor rods. The support system adopts inclined piles and anchor rod support, can reduce the pit bottom uplift phenomenon, effectively control the lateral deformation of the foundation pit, reduce the pile body bending moment, reduce the concrete volume and the reinforcing bar consumption of the support pile and reduce the material cost.
Description
Technical Field
The utility model belongs to the technical field of the excavation supporting, concretely relates to modular batter pile stock excavation supporting system.
Background
In the foundation pit supporting engineering, the supporting forms of cantilever pile supporting, row pile and inner support combination and row pile and anchor rod combination are common, but the supporting forms have respective limitations. The cantilever pile has simple supporting construction and poor deformation control capability and can only be suitable for shallow foundation pits with better soil property; the combined supporting of the row piles and the inner supports can be used for a deep foundation pit, the supporting capability is strong, but the inner supports occupy a large construction area in the foundation pit, the later construction progress is influenced, and the overall cost is high; the pile anchor support has good stability and convenient earthwork excavation, but the reliability of a common anchor rod in the soft soil foundation pit engineering is low, and the condition of disturbance to the surrounding environment due to overlong anchor rod design also exists in the sandy soil and hard clay deep foundation pit engineering.
In recent years, a support form of inclined piles and inclined-straight alternate piles appears in foundation pit support engineering in soft soil areas, and the defects of the support form can be well overcome. However, the support depth of the single inclined pile or inclined-straight alternate pile is shallow, the deformation control capability is limited, and the popularization and application of the inclined pile support are restricted to a certain extent.
SUMMERY OF THE UTILITY MODEL
Aiming at the technical problems in the existing supporting mode, the utility model provides a combined inclined pile anchor rod foundation pit supporting system, which adopts inclined piles and anchor rod combined supporting, can reduce the pit bottom uplift phenomenon, effectively control the lateral deformation of the foundation pit, reduce the pile body bending moment, reduce the concrete volume and the reinforcing bar consumption of the supporting pile, and reduce the material cost; the vertical support piles and the anchor rods are connected through the waist beams, so that the construction space in the foundation pit is not occupied, the anti-overturning capacity of the support structure is improved by fully utilizing the anchoring force, and the support structure is suitable for deeper foundation pits; the inclined pile end adopts a high-pressure rotary spraying process, so that the pile end resistance in soft soil can be improved.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model provides a modular batter pile stock excavation supporting system which characterized in that has one or more of following several supporting construction:
(1) the combined supporting structure of the oblique and straight alternating piles and the anchor rods comprises the following two layouts;
firstly, the vertical support piles and the support piles inclined towards the interior of the foundation pit are alternately arranged at the edge of the foundation pit according to a certain proportion and are connected through pile top crown beams to form inclined-straight alternate pile rows; one or more wales can be arranged on the outer tension surface of the vertical support pile, the prestressed anchor rods are arranged between the vertical piles, and the end parts of the prestressed anchor rods are fixed on the wales. The method comprises the following specific steps: driving vertical supporting piles along the edge of the foundation pit, and driving the supporting piles inclined towards the inner side of the foundation pit between the adjacent vertical piles according to a certain proportion and a certain inclination angle; arranging crown beams on the pile tops of the vertical piles and the inclined piles to form an integral structure; constructing a prestressed anchor rod on a pile top crown beam according to design requirements; excavating a foundation pit to reach the designed elevation of a pile body anchor rod, constructing a corresponding waist beam on a tension surface on the outer side of the vertical pile, and constructing a prestressed anchor rod; and repeating the previous step until the soil body is excavated to the bottom of the pit, and reserving the soil body between the inclined and straight row piles below the designed elevation of the last anchor rod.
Secondly, the vertical support piles and the support piles inclined towards the outside of the foundation pit are alternately arranged at the edge of the foundation pit according to a certain proportion and are connected through pile top crown beams to form inclined-straight alternate piles; one or more wales can be arranged on the outer tension surface of the vertical support pile, the prestressed anchor rods are arranged between the vertical piles, and the end parts of the prestressed anchor rods are fixed on the wales. The method comprises the following specific steps: driving vertical supporting piles along the edge of the foundation pit, and driving the supporting piles inclined towards the outer side of the foundation pit between the adjacent vertical piles according to a certain proportion and a certain inclination angle; arranging crown beams on the pile tops of the vertical piles and the inclined piles to form an integral structure; constructing a prestressed anchor rod on a pile top crown beam according to design requirements; excavating a foundation pit to reach the designed elevation of a pile body anchor rod, constructing a corresponding waist beam on a tension surface on the outer side of the vertical pile, and constructing a prestressed anchor rod; and repeating the previous step until the pit bottom is excavated.
(2) The single-inclined support pile and anchor rod combined support structure is composed of single-row piles inclined towards the inner side of a foundation pit and anchor rods, the anchor rods are arranged between adjacent inclined piles, and the anchor rods and the support piles are connected through crown beams or waist beams to form the support structure. The method comprises the following specific steps: driving a support pile inclined towards the inner side of the foundation pit along the edge of the foundation pit at a certain angle; arranging a crown beam on the pile top of the inclined pile to form an integral structure; constructing a prestressed anchor rod on a pile top crown beam according to design requirements; excavating a foundation pit to reach the designed elevation of a pile body anchor rod, constructing a corresponding waist beam on a tension surface on the outer side of the inner inclined pile, and constructing a prestressed anchor rod; and repeating the previous step until the pit bottom is excavated.
(3) The double-inclined supporting pile and anchor rod combined supporting structure comprises two rows of inclined supporting piles arranged along the edge of a foundation pit and anchor rods arranged at pile bodies or pile ends, wherein the two rows of inclined piles are respectively inclined towards the inside and the outside of the foundation pit and are alternately arranged according to a certain proportion, and pile tops are connected by crown beams; the waist rail is arranged on the outer tension surface of the inner inclined pile. The method comprises the following specific steps: alternately driving inner inclined piles inclined at a certain angle towards the inner side of the foundation pit and outer inclined piles inclined at a certain angle towards the outer side of the foundation pit along the edge of the foundation pit according to a certain proportion; the top of the inner inclined pile and the top of the outer inclined pile are provided with crown beams to form an integral structure; constructing a prestressed anchor rod on a pile top crown beam according to design requirements; excavating a foundation pit to reach the designed elevation of a pile body anchor rod, constructing a corresponding waist beam on a tension surface on the outer side of the inner inclined pile, and constructing a prestressed anchor rod; and repeating the previous step until the pit bottom is excavated.
The vertical supporting piles and the inclined supporting piles can adopt cast-in-place piles or precast piles, and further can adopt stiff composite piles or pile ends are treated by high-pressure jet grouting piles; wherein, the inclined pile and the vertical direction included angle are within 10~30 degrees.
The pile body waist beam can be a concrete cast-in-place waist beam or a steel waist beam.
The anchor rod can be a common prestressed anchor rod, and further, a high-pressure jet grouting expansion head anchor rod or a recyclable expansion head anchor rod can be adopted; the anchor rod and the horizontal direction included angle is within 10~30 degrees.
Compared with the prior art, the beneficial effects of the utility model are that:
(1) the support system can be better suitable for foundation pit engineering under different geological conditions by combining the inclined piles and the anchor rods, and the uplift resistance and the overturning resistance are improved;
(2) the inclined strut action of the inclined pile is combined with the anchoring action of the anchor rod, so that the pile body bending moment is reduced, the concrete volume and the reinforcement consumption of the support pile are reduced, the material cost is saved, and the overall construction cost is reduced;
(3) the construction is simple and convenient, and occupation of land space is little, makes things convenient for the interior construction operation of later stage foundation ditch, improves the efficiency of construction and saves the time limit for a project.
Drawings
Fig. 1 is a schematic diagram of a combined supporting structure layout I of oblique and straight alternating piles and anchor rods.
Fig. 2 is a schematic diagram of a second layout of the oblique-straight alternating pile and anchor rod combined supporting structure.
Fig. 3 is a schematic view of a single batter pile and anchor combined supporting structure.
Fig. 4 is a schematic view of a combined supporting structure of a double-inclined pile and a rock bolt.
In the figure: 1. the method comprises the following steps of (1) vertical supporting piles, 21. inner inclined supporting piles, 22. outer inclined supporting piles, 3. pile top crown beams, 4. pile body waist beams, 5. prestressed anchor rods and 6. soil retaining among inclined straight piles.
Detailed Description
The present invention will be described in further detail with reference to the following drawings and specific examples, but the following examples are by no means intended to limit the present invention.
Example 1: a combination of oblique and straight alternating piles and anchor rods foundation pit supporting structure is shown in figure 1, and comprises: the method comprises the following steps of vertical supporting piles 1, inner inclined supporting piles 21, pile top crown beams 3, pile body waist beams 4, jet grouting enlarged head anchor rods 5 and soil retaining 6 among inclined straight piles. The method for realizing the supporting structure comprises the following steps: driving vertical supporting piles 1 along the edge of the foundation pit, pressing prefabricated supporting piles 21 inclined towards the inner side of the foundation pit into the adjacent vertical piles according to a certain proportion and a certain inclination angle until the designed elevation of the pile bottom is reached; repeating the steps to form inclined-straight alternate row piles, and pouring concrete crown beams 3 on the pile tops of the vertical piles and the inclined piles to form an integral structure; constructing a prestressed anchor rod 5 on a pile top crown beam according to design requirements; excavating a foundation pit to reach the designed elevation of a pile body anchor rod, constructing a corresponding steel waist beam or concrete waist beam 4 on a tension surface on the outer side of the vertical pile 1, and constructing a jet grouting enlarged footing anchor rod 5; and repeating the previous step until the designed elevation of the pit bottom is excavated, and reserving the soil body 6 between the inclined and straight row piles below the designed elevation of the last anchor rod.
Example 2: another kind of stake and stock combination underground structure are alternated to oblique straight, as shown in fig. 2, this supporting construction includes: the device comprises a vertical supporting pile 1, an outer inclined supporting pile 22, a pile top crown beam 3, a pile body waist beam 4 and a jet grouting enlarged footing anchor rod 5. The method for realizing the supporting structure comprises the following steps: driving vertical supporting piles 1 along the edge of the foundation pit, and pressing prefabricated supporting piles 22 inclined towards the outer side of the foundation pit into the adjacent vertical piles according to a certain proportion and a certain inclination angle until the designed elevation of the pile bottom is reached; repeating the steps to form inclined-straight alternate row piles, and pouring concrete crown beams 3 on the pile tops of the vertical piles and the inclined piles to form an integral structure; excavating a foundation pit to reach the designed elevation of a pile body anchor rod, constructing a corresponding steel waist beam or concrete waist beam 4 on a tension surface on the outer side of the vertical pile 1, and constructing a jet grouting enlarged footing anchor rod 5; and repeating the previous step until the pit bottom is excavated to the designed elevation.
Example 3: monocline fender pile and stock combination underground structure, as shown in fig. 3, this supporting construction includes: the construction method comprises the following steps of inner inclined supporting piles 21, pile top crown beams 3, pile body waist beams 4 and jet grouting enlarged footing anchor rods 5. The method for realizing the supporting structure comprises the following steps: driving a prefabricated support pile 21 inclined towards the inner side of the foundation pit along the edge of the foundation pit at a certain angle; arranging a concrete crown beam 3 on the pile top of the inclined pile to form an integral structure; excavating a foundation pit to reach the designed elevation of a pile body anchor rod, constructing a corresponding steel waist beam or concrete waist beam 4 on a tensile surface on the outer side of the inner inclined pile 21, and constructing a jet grouting enlarged footing anchor rod 5; and repeating the previous step until the pit bottom is excavated.
Example 4: two oblique fender pile and stock combination underground structure, as shown in fig. 4, this supporting construction includes: the outer oblique supporting pile 22, the inner oblique supporting pile 21, the pile top crown beam 3, the pile body waist beam 4 and the jet grouting enlarged footing anchor rod 5. The method for realizing the supporting structure comprises the following steps: alternately driving inner inclined piles 21 inclined at a certain angle towards the inner side of the foundation pit and outer inclined piles 22 inclined at a certain angle towards the outer side of the foundation pit along the edge of the foundation pit according to a certain proportion until the designed elevation of the pile ends is reached, and forming alternately inclined row piles; concrete crown beams 3 are poured at the pile tops of the inner inclined piles 21 and the outer inclined piles 22 to form an integral structure; excavating a foundation pit to reach the designed elevation of a pile body anchor rod, constructing a corresponding steel waist beam or concrete waist beam 4 on a tension surface on the outer side of the inner inclined pile 21, and constructing a jet grouting enlarged footing anchor rod 5; and repeating the previous step until the pit bottom is excavated.
The above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and the changes, modifications, additions or replacements made by those skilled in the art within the scope of the present invention also belong to the protection scope of the present invention.
Claims (4)
1. The utility model provides a modular batter pile stock excavation supporting system which characterized in that has one or more of following several supporting construction: 1) the combined supporting structure of the oblique and straight alternating piles and the anchor rods comprises the following two layouts; firstly, the vertical support piles and the support piles inclined towards the interior of the foundation pit are alternately arranged at the edge of the foundation pit according to a certain proportion and are connected through pile top crown beams to form inclined-straight alternate pile rows; one or more wales can be arranged on the tensile surface at the outer side of the vertical support pile, the prestressed anchor rods are arranged among the vertical piles, and the end parts of the prestressed anchor rods are fixed on the wales; secondly, the vertical support piles and the support piles inclined towards the outside of the foundation pit are alternately arranged at the edge of the foundation pit according to a certain proportion and are connected through pile top crown beams to form inclined-straight alternate piles; one or more wales can be arranged on the tensile surface at the outer side of the vertical support pile, the prestressed anchor rods are arranged among the vertical piles, and the end parts of the prestressed anchor rods are fixed on the wales; 2) the single-inclined support pile and anchor rod combined support structure consists of single-row piles inclined towards the inner side of a foundation pit and anchor rods, the anchor rods are arranged between adjacent inclined piles, and the anchor rods and the support piles are connected through crown beams or waist beams to form a support structure; 3) the double-inclined supporting pile and anchor rod combined supporting structure comprises two rows of inclined supporting piles arranged along the edge of a foundation pit and anchor rods arranged at pile bodies or pile ends, wherein the two rows of inclined supporting piles are respectively inclined towards the inside and the outside of the foundation pit and are alternately arranged according to a certain proportion, and pile tops are connected by crown beams; the waist rail is arranged on the outer tension surface of the inner inclined pile.
2. The combined inclined pile anchor rod foundation pit supporting system according to claim 1, wherein: the vertical supporting piles and the inclined supporting piles can adopt precast piles, cast-in-place piles or stiff composite piles, included angles between the inclined piles and the vertical direction are in the range of 10-30 degrees, and the end part entering the soil can be provided with a high-pressure jet grouting section to enhance end resistance.
3. The combined inclined pile anchor rod foundation pit supporting system according to claim 1, wherein: the pile body waist beam can be a concrete cast-in-place waist beam or a steel waist beam.
4. The combined inclined pile anchor rod foundation pit supporting system according to claim 1, wherein: the anchor rod can be ordinary anchor rod, high pressure jet grouting enlarged footing anchor rod or can retrieve enlarged footing anchor rod, and the anchor rod is 10~30 within range with the horizontal direction contained angle.
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| CN202021508927.3U CN212612520U (en) | 2020-07-24 | 2020-07-24 | Combined type inclined pile anchor rod foundation pit supporting system |
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| CN202021508927.3U CN212612520U (en) | 2020-07-24 | 2020-07-24 | Combined type inclined pile anchor rod foundation pit supporting system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114837199A (en) * | 2022-07-04 | 2022-08-02 | 中国建筑第六工程局有限公司 | Oval foundation pit supporting method of local rigidity reinforced unsupported anchor structure |
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2020
- 2020-07-24 CN CN202021508927.3U patent/CN212612520U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114837199A (en) * | 2022-07-04 | 2022-08-02 | 中国建筑第六工程局有限公司 | Oval foundation pit supporting method of local rigidity reinforced unsupported anchor structure |
| CN114837199B (en) * | 2022-07-04 | 2022-11-01 | 中国建筑第六工程局有限公司 | Oval foundation pit supporting method of local rigidity reinforced unsupported anchor structure |
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