CN211006645U - Drilling bored concrete pile reinforced structure - Google Patents
Drilling bored concrete pile reinforced structure Download PDFInfo
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- CN211006645U CN211006645U CN201921769230.9U CN201921769230U CN211006645U CN 211006645 U CN211006645 U CN 211006645U CN 201921769230 U CN201921769230 U CN 201921769230U CN 211006645 U CN211006645 U CN 211006645U
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Abstract
The utility model discloses a bored concrete pile reinforced structure relates to the technical field of construction, locate including the bored concrete pile body with enclosing the prefabricated concrete of bored concrete pile body week side protects a section of thick bamboo, prefabricated concrete protects a section of thick bamboo and includes a plurality of section of thick bamboo bricks that protect that are the cylinder tube-shape, and a plurality of section of thick bamboo bricks that protect are followed the length direction of bored concrete pile body piles up the connection. The utility model discloses have the drilling excavation construction simple and convenient and can strengthen bored concrete pile mechanical properties's technological effect betterly.
Description
Technical Field
The utility model belongs to the technical field of the technique of construction and specifically relates to a drilling bored concrete pile reinforced structure is related to.
Background
The cast-in-place pile system is a pile formed by forming a pile hole in foundation soil through mechanical drilling, steel pipe soil extrusion or manual excavation and the like on an engineering site, placing a reinforcement cage and cast-in-place concrete in the pile hole, and the cast-in-place pile can be divided into a immersed tube cast-in-place pile, a cast-in-place pile and a cast-in-place pile according to different hole forming methods.
In some unfavorable geologic bodies with high underground water level and large thrust, the excavation of a foundation pit of the cast-in-place pile faces the technical problems of large deformation, instability, damage and the like of the unfavorable geologic bodies caused by the large thrust. If a large-diameter manual hole digging pile is adopted to reinforce a bad geologic body, the construction process is very easily influenced by the underground water level and the large thrust of the geologic body, and the construction risk of manual hole digging is very large; if a large-diameter drilling pile is adopted, under the action of large thrust of unfavorable geology, the surface of the large-diameter drilling pile is laterally extruded, and the hole forming is difficult.
In order to solve the problems, a Chinese patent with a patent publication number of CN207436073U provides an anchor cable frame type bored concrete pile reinforcement structure close to a bedding slope of a bridge abutment, which comprises rear rows of bored concrete piles longitudinally arranged at intervals in a poor geologic body far away from the upper side of the bridge abutment, front rows of bored concrete piles longitudinally arranged at intervals in the poor geologic body close to the upper side of the bridge abutment, and a frame beam positioned on the tops of the rear rows of bored concrete piles and the front rows of bored concrete piles and rigidly connected with the rear rows of bored concrete piles and the front rows of bored concrete piles; and arranging anchor cables at intervals in the longitudinal direction behind the rear row of cast-in-situ bored piles, wherein the rear part of each anchor cable penetrates through the poor geologic body to be anchored on the stable geotechnical body, and the front end of each anchor cable is anchored on the top of the rear row of cast-in-situ bored piles.
The above prior art solutions have the following drawbacks: the cast-in-situ bored pile in the above patent reinforces the structure and need only be applicable to the topography of close proximity abutment bedding side slope with the help of the anchor rope frame, and to the spacious, flat and high, the big bad geologic body of thrust of groundwater level of topography, the two rows of cast-in-situ bored piles of frame-type not only drilling excavation difficulties, and the anchor rope is because be difficult to anchor in stable geotechnical body and can't strut the cast-in-situ bored pile moreover, leads to the bending resistance of cast-in-situ bored pile also to descend to some extent.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming the relatively poor defect of bending resistance of above-mentioned drilling excavation difficulty and bored concrete pile, and provide a drilling excavation construction simple and convenient and can strengthen bored concrete pile mechanical properties's bored concrete pile reinforced structure betterly.
The utility model discloses a can realize through following technical scheme:
bored concrete pile reinforced structure includes the bored concrete pile body and encloses to locate the prefabricated concrete of bored concrete pile body week side protects a section of thick bamboo, prefabricated concrete protects a section of thick bamboo and includes a plurality of protective barrel bricks that are the cylinder tube-shape, and a plurality of protective barrel bricks are followed the length direction of bored concrete pile body is piled up to be connected.
Through adopting above-mentioned technical scheme, enclose at the week of bored concrete pile body and establish prefabricated concrete and protect a section of thick bamboo, prefabricated concrete protects a structural strength height, can play good guard action to the bored concrete pile body, reduces the extrusion effort of bad geologic body to the bored concrete pile body to each item mechanical properties of reinforcing bored concrete pile.
The prefabricated concrete pile casing is formed by piling a plurality of cylindrical pile casing bricks, when drilling and excavating, firstly excavating an annular pit groove for embedding the pile casing bricks at the periphery of a designed foundation pit, then placing the pile casing bricks into the annular pit groove, and excavating and hollowing soil in the pile casing bricks; and further deeply digging the annular pit to enable the first cylindrical protecting brick to gradually sink and put the second cylindrical protecting brick into the first cylindrical protecting brick to be stacked on the first cylindrical protecting brick, and sequentially pushing until drilling and digging are completely finished. Compared with a direct large-diameter manual hole digging pile or a large-diameter drilled pile, the sequentially-propelled drilling hole digging mode has the advantages that the pile casing bricks can well reduce the extrusion acting force borne by the formed holes, and construction and digging are easier.
Further setting the following steps: and a plurality of reinforcing plates extending along the length direction of the cast-in-place pile body are uniformly distributed between the cast-in-place pile body and the inner wall of the precast concrete pile casing in the circumferential direction.
By adopting the technical scheme, the plurality of reinforcing plates can play a limiting role on the plurality of pile casing bricks between the inner wall of the precast concrete pile casing and the cast-in-place pile body, so that the piled pile casing bricks are not easy to shift, and the supporting strength of the precast concrete pile casing is improved. The reinforcing plates also play a certain supporting role on the circumferential side surface of the cast-in-place pile body, so that the bending strength of the cast-in-place pile body is improved.
Further setting the following steps: two terminal surfaces of protecting a section of thick bamboo brick are the inclined plane, and two terminal surface incline direction the same of protecting a section of thick bamboo brick.
Through adopting above-mentioned technical scheme, protect two terminal surfaces of a section of thick bamboo brick and all set to the inclined plane that the incline direction is the same, can reduce the hindrance effort of protecting a section of thick bamboo brick when sinking the end from top to bottom, be convenient for protect placing the construction of a section of thick bamboo brick, reduce the drilling excavation construction degree of difficulty.
Further setting the following steps: the bored concrete pile body include the steel reinforcement cage skeleton with pour in concrete column on the steel reinforcement cage skeleton, the steel reinforcement cage skeleton includes that a plurality of main muscle and the spiral that are the circumference and arrange are around establishing a plurality of stirrup on the main muscle is a plurality of still be equipped with the structure reinforcement between the main muscle.
Through adopting above-mentioned technical scheme, a plurality of main muscle that are the circumference and arrange and spiral constitute the steel reinforcement cage skeleton of bored concrete pile body around the stirrup of establishing on the main muscle, and the steel reinforcement cage skeleton plays good structure additional strengthening for the bored concrete pile body. Set up the structure reinforcement between a plurality of owner muscle, the structure reinforcement is strengthened each owner muscle, makes the owner muscle have better resistance to compression, tensile and bending resistance.
Further setting the following steps: the structure reinforcement comprises a plurality of reinforcing ribs which are evenly divided into a plurality of groups and are evenly fixed between the main ribs along the length direction of the cast-in-place pile body.
Through adopting above-mentioned technical scheme, a plurality of groups strengthening rib are fixed between a plurality of main muscle along the length direction of bored concrete pile body, both connect into the higher whole of intensity with a plurality of main muscle, also make the structure additional strengthening of each length position of bored concrete pile body more even, and overall structure stability is better.
Further setting the following steps: and each group of reinforcing ribs is welded and fixed with the main ribs in a divergent manner by taking the central axis of the cast-in-place pile body as the center in the cross section of the cast-in-place pile body.
Through adopting above-mentioned technical scheme, the every group strengthening rib that disperses the form connects a plurality of main muscle in the middle of a plurality of main muscle, and every group strengthening rib not only connects into a plurality of main muscle higher whole of intensity, and the strengthening rib that disperses the form moreover can play the supporting role to a plurality of main muscle in the center department of bored concrete pile body, makes a plurality of main muscle be difficult for drawing in owing to receive great extrusion effort to improve the structural stability of steel reinforcement cage skeleton.
Further setting the following steps: and a fine stone concrete cushion layer is poured at the position, close to the top, of the cast-in-place pile body, and the top surface of the prefabricated concrete pile casing and the bottom surface of the fine stone concrete cushion layer are fixed in a grouting mode.
By adopting the technical scheme, the fine stone concrete cushion layer plays a certain protection role on the prefabricated concrete pile casing below, and the fine stone concrete cushion layer and the prefabricated concrete pile casing are fixed in a grouting manner, so that the position stability of the pile casing brick at the highest layer can be further improved, the pile casing brick at the highest layer is not easy to shift, and the overall strength is higher.
Further setting the following steps: the tops of the main reinforcements extend to the top of the top surface of the concrete column, the parts of the main reinforcements, which exceed the concrete column, are bent in a divergent mode outwards, and crown beams which completely cover the tops of the main reinforcements are poured on the fine stone concrete cushion layer.
By adopting the technical scheme, the crown beam connects the plurality of cast-in-situ bored piles together, so that the collapse of the top edge of the foundation pit can be effectively prevented.
To sum up, the utility model discloses a beneficial technological effect does:
(1) the prefabricated concrete pile casing is arranged around the cast-in-place pile body, the structural strength of the prefabricated concrete pile casing is high, the cast-in-place pile body can be well protected, the extrusion acting force of a bad geologic body on the cast-in-place pile body is reduced, and therefore various mechanical properties of the cast-in-place bored pile are enhanced;
(2) the prefabricated concrete pile casing is formed by piling a plurality of cylindrical pile casing bricks, the plurality of pile casing bricks sink one by one and excavate layer by layer during drilling excavation, and the pile casing bricks can better reduce the extrusion acting force applied to hole forming compared with a direct large-diameter manual hole digging pile or a large-diameter drilled pile by adopting a sequentially-propelled drilling excavation mode, so that the construction excavation is easier;
(3) the reinforcing ribs are fixed among the main ribs of the steel reinforcement cage framework, each group of reinforcing ribs is welded and fixed with the main ribs in a divergent mode by taking the central axis of the cast-in-place pile body as the center in the cross section of the cast-in-place pile body, the main ribs are not only connected into a whole with higher strength, but also the reinforcing ribs in the divergent mode can play a supporting role for the main ribs at the center of the cast-in-place pile body, the main ribs are not easy to draw in due to the fact that the main ribs are subjected to larger extrusion force, and therefore structural stability of the steel reinforcement cage framework is improved.
Drawings
FIG. 1 is a schematic view of the overall structure of the present embodiment;
fig. 2 is a sectional view taken along line a-a of fig. 1.
Reference numerals: 1. pouring a pile body; 2. prefabricating a concrete casing; 3. protecting the cylindrical brick; 4. a reinforcing plate; 5. a reinforcement cage framework; 6. a concrete column; 7. a main rib; 8. hooping; 9. reinforcing ribs; 10. fine stone concrete cushion layer; 11. a crown beam.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
A bored pile reinforcing structure is shown in figure 1 and comprises a bored pile body 1 and a prefabricated concrete pile casing 2, wherein the prefabricated concrete pile casing 2 is embedded in a foundation pit, and the bored pile body 1 is poured in the prefabricated concrete pile casing 2. The precast concrete pile casing 2 is formed by grouting a plurality of cylindrical pile casing bricks 3, and the plurality of pile casing bricks 3 are piled and connected along the length direction of the cast-in-place pile body 1. In order to make the construction of sinking the cylindrical protecting brick 3 easier and more convenient, two end faces of the cylindrical protecting brick 3 are both arranged to be inclined planes with the same inclination direction, and the end face of the bottom of the cylindrical protecting brick 3 inclines towards the inside of the cylindrical protecting brick 3 when the cylindrical protecting brick 3 is placed in the annular pit slot.
When drilling and excavating, firstly excavating an annular pit groove for embedding the cylindrical protecting brick 3 at the periphery of the designed foundation pit position, then placing the first cylindrical protecting brick 3 into the annular pit groove, and excavating and hollowing soil in the cylindrical protecting brick 3 to form the foundation pit for pouring the cast-in-place pile body 1; and further deeply digging the annular pit to enable the first cylindrical protecting brick 3 to gradually sink and put in the second cylindrical protecting brick 3 to be stacked on the first cylindrical protecting brick 3, and sequentially pushing until drilling and digging are completely finished. Compared with a direct large-diameter manual hole digging pile or a large-diameter drilled pile, the sequentially-propelled drilling hole digging mode has the advantages that the barrel protection bricks 3 can well reduce the extrusion acting force borne by formed holes, and construction and digging are easier.
A plurality of reinforcing plates 4 extending along the length direction of the cast-in-place pile body 1 are circumferentially and uniformly distributed between the cast-in-place pile body 1 and the inner wall of the prefabricated concrete pile casing 2, and the bottom of each reinforcing plate 4 is driven into soil at the bottom of the foundation pit. The reinforcing plate 4 is a channel steel or a long wood plate, the reinforcing plate 4 is arranged by being attached to the inner wall of the precast concrete casing 2, and the reinforcing plate 4 and the plurality of casing bricks 3 can be locked and fixed through expansion bolts (not shown in the figure) so as to further enhance the connection stability between the reinforcing plate 4 and the inner wall of the precast concrete casing 2.
As shown in fig. 1 and 2, the cast-in-place pile body 1 includes a reinforcement cage framework 5 and a concrete column 6 poured on the reinforcement cage framework 5, and the peripheral side surface of the concrete column 6 is abutted to the inner wall of the prefabricated concrete casing 2. The steel reinforcement cage framework 5 comprises a plurality of main reinforcements 7 arranged in the circumferential direction and stirrups 8 spirally wound on the main reinforcements 7, the stirrups 8 are positioned on the outer side surfaces of the cylindrical cylinders surrounded by the main reinforcements 7, and structural reinforcements are further arranged in the cylindrical cylinders formed by the main reinforcements 7. The structural reinforcement comprises a plurality of reinforcing ribs 9, and the plurality of reinforcing ribs 9 are uniformly divided into a plurality of groups and are uniformly fixed among the plurality of main ribs 7 along the length direction of the cast-in-place pile body 1. Each group of reinforcing ribs 9 is welded and fixed with the plurality of main ribs 7 in a divergent manner by taking the central axis of the cast-in-place pile body 1 as the center in the cross section of the cast-in-place pile body 1, and one end, far away from the main ribs 7, of each group of reinforcing ribs 9 is welded and fixed at the central axis of the cast-in-place pile body 1. In order to enable the concrete mixture to smoothly pass through each group of reinforcing ribs 9 to reach the bottom of the foundation pit, the number of the reinforcing ribs 9 in each group is 6-8.
The reinforcing ribs 9 not only connect the main ribs 7 into a whole with higher strength, but also support the main ribs 7 at the center of the cast-in-place pile body 1 by the aid of the divergent reinforcing ribs 9, so that the main ribs 7 are not easy to fold due to large extrusion force, and structural stability of the steel reinforcement cage framework 5 is improved.
A fine stone concrete cushion layer 10 is poured on the position, close to the top, of the cast-in-place pile body 1, the fine stone concrete cushion layer 10 is in a ring shape and fixedly surrounds the concrete column 6, and the top surface of the prefabricated concrete pile casing 2 and the bottom surface of the fine stone concrete cushion layer 10 are fixed in a grouting mode. The tops of the main reinforcements 7 extend to the top surface of the concrete column 6, the parts of the main reinforcements 7, which exceed the concrete column 6, are bent in a diverging manner, the anchoring lengths of the main reinforcements 7, which exceed the concrete column 6, are not less than 30 times of the diameter of the main reinforcements 7, and crown beams 11 which completely cover the tops of the main reinforcements 7 are poured on the fine stone concrete cushion layer 10. The crown beam 11 connects a plurality of cast-in-situ bored piles together, and can effectively prevent the top edge of the foundation pit from collapsing.
The implementation principle and the beneficial effects of the embodiment are as follows: the prefabricated concrete pile casing 2 is arranged around the cast-in-place pile body 1, the structural strength of the prefabricated concrete pile casing 2 is high, the cast-in-place pile body 1 can be well protected, the extrusion acting force of bad geological bodies on the cast-in-place pile body 1 is reduced, and therefore various mechanical properties of the cast-in-place pile are enhanced. Prefabricated concrete protects a section of thick bamboo 2 and is piled up by a plurality of fender section of thick bamboo bricks 3 that are the cylinder tube-shape and form, and a plurality of fender section of thick bamboo bricks 3 sink one by one and the successive layer excavation during drilling excavation, adopt propulsive drilling excavation mode in proper order, compare in direct major diameter manual hole digging pile or major diameter bored pile, protect section of thick bamboo brick 3 can reduce the extrusion effort that the pore-forming received betterly, and the construction excavation is easier.
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 (8)
1. Drilling bored concrete pile reinforced structure, its characterized in that: including bored concrete pile body (1) and enclose and locate the prefabricated concrete of bored concrete pile body (1) week side protects a section of thick bamboo (2), prefabricated concrete protects a section of thick bamboo (2) and includes a plurality of protect section of thick bamboo bricks (3) that are the cylinder tube-shape, and a plurality of protect section of thick bamboo bricks (3) to follow the length direction of bored concrete pile body (1) is piled up to be connected.
2. The cast-in-situ bored pile reinforcing structure according to claim 1, wherein: a plurality of reinforcing plates (4) extending along the length direction of the cast-in-place pile body (1) are circumferentially and uniformly distributed between the cast-in-place pile body (1) and the inner wall of the precast concrete casing (2).
3. The cast-in-situ bored pile reinforcing structure according to claim 2, wherein: two end faces of the cylindrical protecting brick (3) are inclined faces, and the inclined directions of the two end faces of the cylindrical protecting brick (3) are the same.
4. The cast-in-situ bored pile reinforcing structure according to claim 1, wherein: bored concrete pile body (1) include steel reinforcement cage skeleton (5) and pour in concrete column (6) on steel reinforcement cage skeleton (5), steel reinforcement cage skeleton (5) include a plurality of main muscle (7) and the spiral that are the circumference and arrange around establishing a plurality of stirrup (8) on main muscle (7) are a plurality of still be equipped with the structure reinforcement between main muscle (7).
5. The cast-in-situ bored pile reinforcing structure according to claim 4, wherein: the structure reinforcement comprises a plurality of reinforcing ribs (9), wherein the reinforcing ribs (9) are uniformly divided into a plurality of groups and are uniformly fixed between the main ribs (7) along the length direction of the cast-in-place pile body (1).
6. The cast-in-situ bored pile reinforcing structure according to claim 5, wherein: each group of reinforcing ribs (9) is welded and fixed with the main ribs (7) in a divergent manner in the cross section of the cast-in-place pile body (1) by taking the central axis of the cast-in-place pile body (1) as the center.
7. The cast-in-situ bored pile reinforcing structure according to claim 6, wherein: a fine stone concrete cushion layer (10) is poured at a position, close to the top, of the cast-in-place pile body (1), and the top surface of the prefabricated concrete pile casing (2) and the bottom surface of the fine stone concrete cushion layer (10) are fixed in a grouting mode.
8. The cast-in-situ bored pile reinforcing structure according to claim 7, wherein: the tops of the main reinforcements (7) extend to the top of the top surface of the concrete column (6), the parts of the main reinforcements (7) exceeding the concrete column (6) are bent in a divergent mode outwards, and crown beams (11) completely covering the tops of the main reinforcements (7) are poured on the fine stone concrete cushion layer (10).
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| CN201921769230.9U CN211006645U (en) | 2019-10-21 | 2019-10-21 | Drilling bored concrete pile reinforced structure |
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| CN201921769230.9U CN211006645U (en) | 2019-10-21 | 2019-10-21 | Drilling bored concrete pile reinforced structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116516923A (en) * | 2023-06-21 | 2023-08-01 | 兰州理工大学 | Structure for treating earthen site foundation and application method thereof |
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2019
- 2019-10-21 CN CN201921769230.9U patent/CN211006645U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116516923A (en) * | 2023-06-21 | 2023-08-01 | 兰州理工大学 | Structure for treating earthen site foundation and application method thereof |
| CN116516923B (en) * | 2023-06-21 | 2024-01-26 | 兰州理工大学 | Structure for treating earthen site foundation and application method thereof |
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