CN214832742U - Dig deeply and stir major diameter strength nature composite pile structure soon - Google Patents
Dig deeply and stir major diameter strength nature composite pile structure soon Download PDFInfo
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- CN214832742U CN214832742U CN202121302180.0U CN202121302180U CN214832742U CN 214832742 U CN214832742 U CN 214832742U CN 202121302180 U CN202121302180 U CN 202121302180U CN 214832742 U CN214832742 U CN 214832742U
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Abstract
The utility model discloses a rotary digging deep-stirring large-diameter stiff composite pile structure, which comprises a foundation and a foundation pit supporting mechanism arranged on the foundation; the foundation pit supporting mechanism consists of a plurality of composite piles, each composite pile comprises a cement mixing pile, and the cement mixing piles are embedded in the top surface of the foundation; the cement soil mixing piles are longitudinally arranged; the peripheral wall of the cement mixing pile is embedded in the foundation; a precast pile group is arranged in the cement mixing pile; the precast pile group is superposed with the cement soil mixing pile in the axial direction; can improve the bearing capacity or the foundation ditch stagnant water of ground and strut the effect, guarantee superstructure or excavation supporting's security, and the utility model discloses the efficiency of construction is high, and the cost is practiced thrift, but the potentiality of furthest's performance original state soil can solve the cement mixing pile stake pile forming construction problem of deep boulder and rubble soil layer, is a bearing capacity high dig soon and stir major diameter strength nature composite pile structure deeply.
Description
Technical Field
The utility model relates to a geotechnical engineering technical field especially relates to a dig deeply and stir major diameter strength nature composite pile structure soon.
Background
With the rapid development of industrial buildings and civil fields in China, the number of stories and the height of the building are higher and higher. Therefore, the requirements for the bearing capacity of the foundation and the supporting of the foundation pit are also higher and higher. In order to meet the requirements of designing a house exhibition, people develop more composite pile foundations, and stiff composite piles are novel composite pile foundations which are generally accepted by people and are developed quickly.
In order to satisfy the demand on different soil layers, especially towards foundation soils such as flood, lake, slope residual, need urgently need utility model a dig deeply and stir big diameter strength nature composite pile structure soon and satisfy bearing capacity and the demand of warping.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a dig deeply and stir major diameter strength nature composite pile structure soon.
In order to achieve the above object, the utility model provides a following scheme: the utility model provides a rotary digging deep-stirring large-diameter stiff composite pile structure, which comprises a foundation and a foundation pit supporting mechanism arranged on the foundation; the foundation pit supporting mechanism consists of a plurality of composite piles, each composite pile comprises a cement mixing pile, and the cement mixing piles are embedded in the top surface of the foundation; the cement soil mixing piles are longitudinally arranged; the peripheral wall of the cement mixing pile is embedded in the foundation; a precast pile group is arranged in the cement mixing pile; and the precast pile group is superposed with the cement mixing pile in the axial direction.
Preferably, the pile diameter of the cement-soil mixing pile is 800mm-1500 mm; the pile length of the cement soil mixing pile is 10m-30 m.
Preferably, the precast pile group includes at least one precast pile.
Preferably, two adjacent cement mixing piles of the plurality of cement mixing piles are mutually meshed.
Preferably, the cross section of the precast pile is circular or square; the pile diameter or side length of the precast pile is 400mm-1000 mm.
The utility model discloses a following technological effect: the utility model provides a dig deeply and stir major diameter strength nature composite pile structure soon improves the bearing capacity or the foundation ditch stagnant water of ground and struts the effect, guarantees superstructure or excavation supporting's security, and the utility model discloses the efficiency of construction is high, and the cost is practiced thrift, but furthest's the potentiality of performance original state soil, the cement stirring stake pile that can solve deep boulder and rubble soil layer becomes the stake problem, reduces polluted environment, has the characteristics that have the building disturbance little to surrounding, is a bearing capacity height dig soon and stir major diameter strength nature composite pile structure deeply.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.
Fig. 1 is a schematic structural view of the foundation pit supporting structure of the utility model;
fig. 2 is a plan view of the continuous arrangement of the precast piles of the present invention;
fig. 3 is a top view of the precast piles arranged at intervals according to the present invention;
FIG. 4 shows a rotary drilling machine of the present invention;
FIG. 5 is a drawing of the pile press of the present invention;
FIG. 6 is a schematic structural view of a cement mixing pile according to the present invention;
fig. 7 is a schematic structural view of a single pile cap in embodiment 4 of the present invention;
fig. 8 is a schematic structural view of a double pile cap in embodiment 4 of the present invention;
fig. 9 is a schematic structural view of a three-pile cap in embodiment 4 of the present invention;
fig. 10 is a schematic structural view of a four-pile cap according to embodiment 4 of the present invention;
fig. 11 is a schematic structural view of a five-pile cap in embodiment 4 of the present invention;
fig. 12 is a schematic structural view of a full hall pile arrangement platform according to embodiment 4 of the present invention;
fig. 13 is a schematic structural view of a connection mechanism according to embodiment 2 of the present invention;
fig. 14 is a schematic structural view of connection of precast piles in embodiment 3 of the present invention;
fig. 15 is a partial enlarged view of a1 in embodiment 3 of the present invention;
fig. 16 is a partial enlarged view of a2 in embodiment 3 of the present invention;
fig. 17 is a partial enlarged view of a3 in embodiment 3 of the present invention;
fig. 18 is a partial enlarged view of a4 in embodiment 2 of the present invention;
the concrete pile comprises a cement soil mixing pile 1, a precast pile 2, a connecting cylinder 3, an inserting cylinder 4, a bearing platform 5, a cushion layer 6, an inserting rod 7, a clamping block 8, a clamping groove 9, a spring 10, a power rod 11 and a connecting rod 12.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description.
Example 1
Referring to fig. 1-6, a rotary excavating deep-stirring large-diameter stiff composite pile structure comprises a foundation and a foundation pit supporting mechanism arranged on the foundation; the foundation pit supporting mechanism consists of a plurality of composite piles, each composite pile comprises a cement mixing pile 1, and the cement mixing piles 1 are embedded on the top surface of the foundation; the cement soil mixing pile 1 is arranged longitudinally; the peripheral wall of the cement mixing pile 1 is embedded in the foundation; a prefabricated pile group is arranged in the cement mixing pile 1; and the precast pile group is coincided with the axis direction of the cement mixing pile 1. The cement-soil mixing pile 1 is a rotary excavating large-diameter cement-soil mixing pile, and can be applied to pile foundation engineering and foundation pit engineering by combining with the precast pile 2.
According to a further optimized scheme, the pile diameter of the cement soil mixing pile 1 is 800mm-1500 mm; the length of the cement soil mixing pile 1 is 10m-30 m. The precast piles 2 can be arranged in the plurality of cement soil mixing piles 1 at intervals; the soil cement mixing pile 1 increases the pile diameter, can increase the side frictional resistance of the soil cement mixing pile 1 increases the bearing capacity of the composite pile foundation.
In a further preferred embodiment, the precast pile group comprises at least one precast pile 2. The precast piles 2 are arranged according to a special plane, and when more than one precast pile 2 is arranged, the precast piles 2 sequentially enter the cement mixing pile 1 and are connected end to end.
According to the further optimized scheme, two adjacent cement soil mixing piles 1 of the plurality of cement soil mixing piles 1 are meshed with each other. The cement mixing piles 1 with large diameters are mutually occluded to form a water stop structure, and the precast piles 2 are inserted into the middle of the cement mixing piles continuously or at intervals to form an occluded pile continuous wall structure integrating water stop and support, so that the structure can solve the problem of water stop curtain construction of deep gravel and gravel layers, reduce the environmental pollution and has the characteristic of small influence on the existing surrounding buildings; the time interval of the construction of the adjacent secant piles is determined according to field tests, and the cement soil mixing piles 1 with large diameters are meshed with each other to increase the structural integrity and the horizontal lateral movement resistance rigidity.
In a further optimized scheme, the cross section of the precast pile 2 is circular or square; the diameter or side length of the precast pile 2 is 400mm-1000 mm. The pile diameter of precast pile 2 should be less than the pile diameter of cement mixing pile 1, according to the concrete foundation soil condition in construction site, total length after precast pile 2 connects can be less than, equal to or be greater than the pile length of cement mixing pile 1. The large-diameter cement mixing pile 1 can provide larger pile side friction force, and saves cost compared with other pile types under the same bearing capacity requirement.
According to the further optimization scheme, the precast pile 2 is pressed into the center of the cement mixing pile 1 by using the pile pressing machine, and forms a stiff composite pile foundation together with the cement mixing pile 1, the diameter of the cement mixing pile 1 can be increased and the pile forming quality can be improved by using the improved rotary excavating mixing process, so that the bearing capacity of the composite pile foundation is increased; the water stop and support problems in deep round gravel layers and broken stone layers can be simultaneously solved in the foundation pit support engineering.
The technical scheme is further optimized, the method breaks through the stratum limit of the conventional mixing pile, and is suitable for all foundations of soil layer conditions except bedrock, including soft soil foundations, cohesive soil foundations, broken stone soil foundations, sand soil foundations and other special soil foundations; the method adopts a positive and negative rotation stirring process, so that the cement soil can be stirred more uniformly, and the pile forming quality can be ensured.
According to the further optimization scheme, in the construction process of the cement-soil mixing pile 1, different external admixtures are added into the curing agent aiming at various poor foundation soils; aiming at various poor foundation soils, different admixture can be added into the curing agent to ensure the quality of the pile, and different curing agents can be combined or used independently according to different soil layers during specific construction.
According to a further optimized scheme, when the pile press presses the precast pile 2, the precast pile 2 is pressed into the center of the cement mixing pile 1 through static pressure or vibration according to different soil layers. The pile pressing machine presses the precast pile into the cement soil mixing pile 1 by a static pressure or vibration method according to different soil layers to form a stiff composite pile with good side friction resistance and rigidity; the pile diameter and the pile length of the precast pile 2 are both smaller than those of the cement soil mixing pile; from the construction of the precast pile 2 to the completion of the construction of the precast pile 2, the time is controlled to be completed before the final setting of the cement-soil mixing pile 1.
Example 2
Referring to fig. 13 and 18, a connecting mechanism is arranged in the precast pile;
the connecting mechanism comprises a connecting cylinder 3; the connecting cylinder 3 is arranged in the inner cavity of the precast pile 2; the connecting cylinder 3 is coincident with the axis of the precast pile 2; a plurality of inserting cylinders 4 are circumferentially arranged in the middle of the outer wall of the connecting cylinder 3; one end of the plug-in cylinder 4 is communicated with the outer wall of the connecting cylinder 3; the other end of the inserting cylinder 4 is communicated with the inner wall of the precast pile 2; the top of the inner wall of the connecting cylinder 3 is connected with a power rod 11 in a sliding manner; the top surface of the power rod 11 and the top surface of the connecting cylinder 3 are positioned on the same plane; the bottom surface of the power rod 11 is of a conical structure; the bottom of the inner wall of the connecting cylinder 3 is provided with a connecting rod 12; the top of the outer wall of the connecting rod 12 is fixedly connected with the bottom of the inner wall of the connecting cylinder 3; the bottom of the connecting rod 12 extends out of the inner cavity of the connecting cylinder 3; the bottom of the outer wall of the connecting rod 12 is provided with a clamping component; the insertion rod 7 is arranged in the insertion cylinder 4; the end surface of one end of the insertion rod 7 close to the connecting cylinder 3 is an inclined surface; the inclined surface is matched with the bottom surface of the power rod 11 in shape; when the precast pile is pressed into the cement-soil mixing pile 1 by using the pile pressing machine, the connecting rod 12 positioned at the bottom of the precast pile 2 is inserted into the top of the inner cavity of the precast pile 2 and is abutted against the top surface of the power rod 11, the power rod 11 is pushed downwards by the connecting rod 12 when the precast cylinder 2 moves downwards, the bottom surface of the power rod 11 is in sliding connection with the side surface of the insertion rod 7, the insertion rod 7 is pushed outwards in the downward moving process, the insertion rod 7 extends out of the precast pile 2 and is inserted into the cement-soil mixing pile 1, and the connection strength between the precast pile 2 and the cement-soil mixing pile 1 is enhanced; and after the precast pile 2 is completely driven into the cement mixing pile 1, pouring concrete into the precast pile 2 to enhance the strength of the precast pile 2.
Example 3
Referring to fig. 14-17, the clamping assembly includes a clamping block 8; a plurality of clamping grooves 9 are circumferentially formed in the top of the inner wall of the connecting cylinder 3; a plurality of telescopic grooves are circumferentially formed in the bottom of the outer wall of the connecting rod 12; a spring 10 is fixedly connected to the bottom of the telescopic groove; the spring 10 is fixedly connected with the clamping block 8; the clamping block 8 is matched with the clamping groove 9; set up joint piece 8 stretches into behind the joint groove 9, adjacent two 1 top surfaces of precast pile and bottom surface butt accomplish to be connected, and the reinforcing is adjacent the connectivity between precast pile 2.
Example 4
Referring to fig. 7-12, the top surface of the foundation is provided with a bedding layer 6; a bearing platform 5 is fixedly connected to the bottom surface of the pad side; the cushion layer 6 is matched with the bearing platform 5 in shape; the bottom surface of the cushion layer 6 is fixedly connected with the top surface of the cement soil mixing pile 1; the bearing platform 5 can define a specific shape according to the number and arrangement positions of the composite piles arranged on the bottom surface of the bearing platform 5; the bearing platform 5 can be divided into a single-pile bearing platform, a double-pile bearing platform, a three-pile bearing platform, a four-pile bearing platform, a five-pile bearing platform and a full-range pile arrangement bearing platform.
In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description of the present invention, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
The above-mentioned embodiments are only intended to describe the preferred embodiments of the present invention, but not to limit the scope of the present invention, and those skilled in the art should also be able to make various modifications and improvements to the technical solution of the present invention without departing from the spirit of the present invention, and all such modifications and improvements are intended to fall within the scope of the present invention as defined in the appended claims.
Claims (5)
1. A rotary excavating deep-stirring large-diameter stiff composite pile structure comprises a foundation and a foundation pit supporting mechanism arranged on the foundation; the foundation pit supporting mechanism is composed of a plurality of composite piles and is characterized in that the composite piles comprise cement soil mixing piles (1), and the cement soil mixing piles (1) are embedded in the top surface of the foundation; the cement soil mixing pile (1) is arranged longitudinally; the peripheral wall of the cement soil mixing pile (1) is embedded in the foundation; a precast pile group is arranged in the cement soil mixing pile (1); the precast pile group is coincided with the axis direction of the cement mixing pile (1).
2. The rotary excavating deep-stirring large-diameter stiff composite pile structure according to claim 1, characterized in that: the pile diameter of the cement soil mixing pile (1) is 800mm-1500 mm; the length of the cement soil mixing pile (1) is 10m-30 m.
3. The rotary excavating deep-stirring large-diameter stiff composite pile structure according to claim 1, characterized in that: the precast pile group comprises at least one precast pile (2).
4. The rotary excavating deep-stirring large-diameter stiff composite pile structure according to claim 3, characterized in that: and adjacent two cement soil mixing piles (1) of the plurality of cement soil mixing piles (1) are mutually occluded.
5. The rotary excavating deep-stirring large-diameter stiff composite pile structure according to claim 3, characterized in that: the cross section of the precast pile (2) is circular or square; the diameter or side length of the precast pile (2) is 400mm-1000 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121302180.0U CN214832742U (en) | 2021-06-11 | 2021-06-11 | Dig deeply and stir major diameter strength nature composite pile structure soon |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121302180.0U CN214832742U (en) | 2021-06-11 | 2021-06-11 | Dig deeply and stir major diameter strength nature composite pile structure soon |
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| Publication Number | Publication Date |
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| CN214832742U true CN214832742U (en) | 2021-11-23 |
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| CN202121302180.0U Active CN214832742U (en) | 2021-06-11 | 2021-06-11 | Dig deeply and stir major diameter strength nature composite pile structure soon |
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