CN218437104U - Connecting structure of precast concrete pile and foundation pit supporting reinforced concrete inner support - Google Patents
Connecting structure of precast concrete pile and foundation pit supporting reinforced concrete inner support Download PDFInfo
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- CN218437104U CN218437104U CN202222854711.8U CN202222854711U CN218437104U CN 218437104 U CN218437104 U CN 218437104U CN 202222854711 U CN202222854711 U CN 202222854711U CN 218437104 U CN218437104 U CN 218437104U
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Abstract
The utility model discloses a connecting structure of a precast concrete pile and a foundation pit supporting reinforced concrete inner support, which comprises a precast concrete pipe pile, a first reinforced concrete inner support, a second reinforced concrete inner support and a third reinforced concrete inner support, wherein the first reinforced concrete inner support is arranged around the top of the precast concrete pipe pile through a concrete pile cap; the second reinforced concrete inner supports are arranged below the first reinforced concrete inner supports at intervals and are arranged around the precast concrete pipe pile in a surrounding manner through the first reinforced concrete ring beam; and the third reinforced concrete inner supports are arranged below the second reinforced concrete inner supports at intervals and are arranged around the precast concrete tubular pile in a surrounding manner through second reinforced concrete ring beams. The utility model discloses support the stand in the upper portion with precast concrete tubular pile direct use to realize replacing the vertical support system of bored concrete pile + steel stand in the traditional construction.
Description
Technical Field
The utility model relates to a connection structure who supports in precast concrete stake and excavation supporting reinforced concrete belongs to structural engineering and geotechnical engineering technical field.
Background
In the conventional foundation pit supporting engineering, a vertical member comprises two parts, namely a column and a column pile. Wherein the upright column is usually an angle steel lattice column, an H-shaped steel, a steel pipe or a steel pipe concrete column; the upright post pile adopts a cast-in-place bored pile. And (4) carrying out combined design on the upright post and the upright post pile according to the engineering requirement. For large-area deep foundation pit engineering, the vertical supporting system adopts the combination type, and has the following defects:
(1) The environmental pollution is large: because the upright post pile adopts a cast-in-place bored pile form, a large amount of waste slurry can be generated in the cast-in-place pile construction process, and the influence on the surrounding environment is large.
(2) The construction progress is slow: compared with the precast concrete pipe pile, the pile forming speed of the cast-in-situ bored pile is far lower than that of the precast pile, and the effect gap is increasingly obvious along with the increase of the pile diameter and the pile length.
(3) The quality control is difficult: the cast-in-situ bored pile has the advantages of multiple quality key points, large control difficulty, such as pore diameter, verticality, sediment thickness, concrete pouring, field processing and installation by using a steel reinforcement cage and a steel stand column and the like.
(4) The construction process has the following defects: the excess concrete invading the inside of the steel upright needs to be chiseled off manually when the cast-in-place pile is cast with concrete, which is time-consuming and labor-consuming, and the treatment is not good, thus easily causing the internal defects and leakage of the structure.
(5) The construction process is complex: the pile foundation construction in the earlier stage comprises drilling, hole cleaning, steel reinforcement cage and steel stand hoisting, underwater concrete pouring, and the later stage earthwork excavation and structure manufacturing stage comprises pile head scum chiseling, reinforcing steel bar straightening anchoring and other multiple processes, so that the on-site construction organization management procedure becomes more tedious.
(6) The construction cost is high: bored concrete pile and steel stand construction cost are far higher than precast pile, simultaneously, in order to guarantee that upper portion steel stand can insert the bored concrete pile, the bored concrete pile diameter is great, is far more than the pile footpath that pile foundation design bearing capacity needs even, has further increased the expense.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a connection structure who supports in precast concrete pile and excavation supporting reinforced concrete replaces the bored concrete pile in traditional construction + steel stand's vertical braces system, and it is big to have overcome environmental pollution, and site conditions is many, the construction progress is slow, quality control is difficult, construction process defect, a series of problems such as construction cost height.
The utility model adopts the technical proposal that: a connecting structure of a precast concrete pile and a foundation pit supporting reinforced concrete inner support comprises a precast concrete pipe pile, a first reinforced concrete inner support, a second reinforced concrete inner support and a third reinforced concrete inner support, wherein the first reinforced concrete inner support is arranged around the top of the precast concrete pipe pile in a surrounding mode through a concrete pile cap, the lower end of the concrete pile cap is provided with a concrete pile in the pipe pile, pile cap anchor bars welded with an end plate of the pipe pile are arranged in the concrete pile cap, and the concrete pile cap, the concrete pile in the pipe pile and the first reinforced concrete inner support are of an integrated pouring structure; the second reinforced concrete inner supports are arranged below the first reinforced concrete inner supports at intervals and are arranged around the precast concrete pipe pile in a surrounding manner through a first reinforced concrete ring beam, vertical lifting ribs are connected between the first reinforced concrete ring beam and the concrete pile cap, and the first reinforced concrete ring beam and the second reinforced concrete inner supports are of an integrated pouring structure; the third reinforced concrete inner supports are arranged below the second reinforced concrete inner supports at intervals and are arranged around the precast concrete tubular pile in a surrounding mode through second reinforced concrete ring beams, and the second reinforced concrete ring beams and the third reinforced concrete inner supports are of an integral pouring structure.
Furthermore, the concrete pile cap is square, a cubic steel reinforcement cage is arranged in the concrete pile cap, an inner support steel reinforcement is arranged in the first reinforced concrete inner support, and the inner support steel reinforcement is arranged in the concrete pile cap in a penetrating mode and is bound with the cubic steel reinforcement cage.
Furthermore, a ring beam ring rib, a ring beam stirrup and a ring beam waist rib are arranged in the first reinforced concrete ring beam, an inner support reinforcing steel bar is arranged in the second reinforced concrete inner support, and the front end of the inner support reinforcing steel bar extends into the first reinforced concrete ring beam.
Furthermore, a ring beam ring rib, a ring beam stirrup and a ring beam waist rib are arranged in the second reinforced concrete ring beam, an inner support reinforcing steel bar is arranged in the third reinforced concrete inner support, and the front end of the inner support reinforcing steel bar extends into the second reinforced concrete ring beam.
Furthermore, the end parts of the ring beam ring rib and the ring beam waist rib are respectively connected by adopting positive and negative wire connecting sleeves.
Furthermore, be equipped with the steel ferrule on the inside wall that second reinforced concrete ring roof beam is close to precast concrete tubular pile, the steel ferrule cup joints around precast concrete tubular pile, and its lateral wall pours together with second reinforced concrete ring roof beam, pours closely through the structural adhesive between inside wall and the precast concrete tubular pile outer wall.
Furthermore, the steel ferrule is formed by welding two semicircular steel sleeves at a seam.
Furthermore, shear-resistant studs and shear-resistant ring ribs are welded around the steel ferrule.
The beneficial effects of the utility model are that: the utility model provides an interior support at the bending resistance of tubular pile stand nodal point position, shear and horizontal biography power problem, support the stand in the upper portion with precast concrete tubular pile is direct to realize replacing the vertical braces system of the bored concrete pile + steel stand in the traditional construction, this structure can greatly reduced engineering cost, improvement construction speed, reduce environmental pollution, reduce all kinds of resource consumption.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
FIG. 1 is a sectional elevation view of the structure of the present invention.
Fig. 2 (a) and (b) are large plan sectional views of the first reinforced concrete inner support position of the present invention.
FIG. 3 is a plan view of a second reinforced concrete inner support location of the present invention.
FIG. 4 is a plan view of the position of the reinforced concrete inner support in the third and following layers of the present invention.
Fig. 5 shows a detail of the reinforced shear ring of the present invention.
The labels in the figure are: 1-precast concrete tubular pile, 2-square concrete pile cap, 3-three-way cubic steel bar cage, 4-tubular pile end plate, 5-pile cap anchor bar, 6-first reinforced concrete inner support, 7-inner support steel bar, 8-tubular pile inner concrete column, 9-vertical hanging bar, 10-first reinforced concrete ring beam, 11-ring beam ring bar, 12-positive and negative wire connecting sleeve, 13-ring beam hoop bar, 14-ring beam waist bar, 15-second reinforced concrete inner support, 16-third reinforced concrete inner support, 17-steel hoop, 18-structural adhesive, 19-shear resistant stud, 20-shear resistant ring bar and 21-second reinforced concrete ring beam.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1-5, the present invention provides an embodiment: a connecting structure of a precast concrete pile and a foundation pit supporting reinforced concrete inner support comprises a precast concrete pipe pile 1, a first reinforced concrete inner support 6, a second reinforced concrete inner support 15 and a third reinforced concrete inner support 16, wherein the first reinforced concrete inner support 15 is arranged around the top of the precast concrete pipe pile 1 through a square concrete pile cap 2, the lower end of the concrete pile cap 2 is provided with a concrete pile inner concrete column 8, a pile cap anchor bar 5 welded with a pipe pile end plate 4 is arranged in the concrete pile cap 2, and the square concrete pile cap 2, the concrete pile inner concrete column 8 and the first reinforced concrete inner support 6 are of an integrated casting structure; the second reinforced concrete inner supports 15 are arranged below the first reinforced concrete inner supports 6 at intervals and are arranged around the prefabricated concrete pipe pile 1 through first reinforced concrete ring beams 10 in a surrounding manner, vertical lifting ribs 9 are connected between the first reinforced concrete ring beams 10 and the square concrete pile cap 2, and the first reinforced concrete ring beams 10 and the second reinforced concrete inner supports 15 are of an integral pouring structure; the third reinforced concrete inner supports 16 are arranged below the second reinforced concrete inner supports 15 at intervals, and are arranged around the precast concrete tubular pile 1 in a surrounding manner through second reinforced concrete ring beams 21, and the second reinforced concrete ring beams 21 and the third reinforced concrete inner supports 16 are of an integral casting structure.
In this embodiment, a cubic steel reinforcement cage 3 is arranged in the square concrete pile cap 2, an inner support steel reinforcement 7 is arranged in the first reinforced concrete inner support, and the inner support steel reinforcement 7 is arranged in the concrete pile cap 2 in a penetrating manner and is bound with the cubic steel reinforcement cage 3.
In this embodiment, a ring beam ring rib 11, a ring beam hoop rib 13 and a ring beam waist rib 14 are arranged in the first reinforced concrete ring beam 10, the end portions of the ring beam ring rib 11 and the ring beam waist rib 14 are respectively connected by a positive and negative wire connecting sleeve 12, the second reinforced concrete inner support 15 is provided with an inner support steel bar 7, and the front end of the inner support steel bar 7 extends into the first reinforced concrete ring beam 10.
In this embodiment, the second reinforced concrete ring beam 21 is internally provided with a ring beam ring rib 11, a ring beam hoop rib 13 and a ring beam waist rib 14, the ends of the ring beam ring rib 11 and the ring beam waist rib 14 are respectively connected by a positive and negative wire connecting sleeve 12, the third reinforced concrete inner support 16 is provided with an inner support steel bar 7, and the front end of the inner support steel bar 7 extends into the second reinforced concrete ring beam 21.
Meanwhile, a steel ferrule 17 is arranged on the inner side wall, close to the precast concrete tubular pile 1, of the second reinforced concrete ring beam 21, the steel ferrule 17 is formed by welding two semicircular steel sleeves at a joint, the steel ferrule 17 is sleeved on the periphery of the precast concrete tubular pile 1, the outer side wall of the steel ferrule 17 and the second reinforced concrete ring beam are cast together, the inner side wall and the outer wall of the precast concrete tubular pile 1 are tightly poured through structural adhesive, and shear-resistant studs 19 and shear-resistant ring ribs 20 are welded on the periphery of the steel ferrule 17.
The construction method of the connecting structure for the precast concrete pile and the foundation pit supporting reinforced concrete inner support comprises the following steps:
the first step is as follows: constructing a precast concrete tubular pile 1 according to a foundation pit support design drawing;
the second step is that: excavating earthwork to the bottom of the first reinforced concrete inner support 6, welding pile cap anchor bars 5 on the tubular pile end plates 4, and anchoring the pile cap anchor bars 5 into the square concrete pile caps 2 to meet the requirement of anchoring length;
the third step: binding a column cap cubic reinforcement cage 3 and a first reinforced concrete inner support reinforcement 7, wherein the inner support reinforcement 7 is arranged in the pile cap 2 in a penetrating way, and meanwhile, reserving a vertical hanging reinforcement 9 downwards;
the fourth step: pouring the pile cap 2 and the first reinforced concrete inner support 6 into a whole by using concrete, and synchronously pouring a concrete column 8 within a range of 5d below the pile top in the tubular pile;
the fifth step: after the first reinforced concrete inner support 6 reaches the design strength, continuing to excavate the earth downwards to the bottom of the second reinforced concrete inner support 15;
and a sixth step: binding upper and lower layer ring bars 11, stirrups 13, waist bars 14 of the ring beam and a second reinforced concrete inner support reinforcing steel bar 7, wherein the ring bars 11 and the waist bars 14 are connected by adopting positive and negative wire connecting sleeves 12, and simultaneously anchoring the reserved vertical hanging bars 9 at the upper part into the first reinforced concrete ring beam 10;
the seventh step: pouring concrete into the first reinforced concrete ring beam 10 and the second reinforced concrete inner support 15 into a whole, and continuously excavating earth downwards to the bottom of a third reinforced concrete inner support 16 after the second reinforced concrete inner support 15 reaches the design strength;
eighth step: filling and compacting the contact surfaces of the two semicircular steel hoops 17 and the concrete pipe pile 1 through structural adhesive 18, and welding the two semicircular steel hoops 17 into a whole at a joint;
the ninth step: welding the shear studs 19 and the shear ring ribs 20 to the steel ferrule 17;
the tenth step: binding upper and lower layer ring bars 11, stirrups 13, waist bars 14 of the ring beam and a third reinforced concrete inner support reinforcing steel bar 7, wherein the ring bars 11 and the waist bars 14 are connected by adopting positive and negative wire connecting sleeves 12;
the eleventh step: pouring the second reinforced concrete ring beam 21 and the third reinforced concrete inner support 16 into a whole by using concrete, and continuously excavating earthwork downwards after the third reinforced concrete inner support 16 reaches the design strength;
the twelfth step: and when more than three reinforced concrete inner supports exist, continuously excavating to the next reinforced concrete inner support bottom, and repeating the eighth step to the eleventh step to construct corresponding in-layer supports until the foundation pit bottom is excavated.
According to the connection of the precast concrete tubular pile upright post 1 and the first reinforced concrete inner support 6, the pile cap 2 is arranged on the pile top, the anchor bars 5 welded to the pile top end plate 4 and the synchronous pouring of the concrete 8 in the range of 5d below the pile top are adopted, so that the connection integrity of the first reinforced concrete inner support and the tubular pile is ensured, and the transmission requirements of bending resistance, shearing resistance and horizontal force of the inner support at the node position are met.
According to the invention, the prefabricated concrete pipe pile upright post 1 is connected with the second reinforced concrete inner support 15, and is anchored into the top pile cap 2 by arranging the lifting rib 9, so that the self weight and other vertical loads of the second reinforced concrete inner support 15 are transferred into the top pile cap; through setting up first reinforced concrete ring beam 10, guaranteed the wholeness that second reinforced concrete interior support 15 and tubular pile stand 1 are connected, satisfied the interior transmission demand that supports bending resistance, shearing and horizontal force at the node position.
The precast concrete tubular pile upright post 1 is connected with a third reinforced concrete inner support 16 and each layer below the third reinforced concrete inner support, and the self weight and other live loads of the third reinforced concrete inner support and each layer below the third reinforced concrete inner support are directly transmitted to the tubular pile upright post by welding shear-resistant studs 19 and shear-resistant ring ribs 20 on steel hoops 17; by arranging the second reinforced concrete ring beam 21, the integrity of the connection between the reinforced concrete inner supports of the third and following layers and the tubular pile upright posts is ensured, and the requirements of the inner supports on bending resistance, shearing resistance and horizontal force transmission at node positions are met.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It should be understood by those skilled in the art that the above embodiments do not limit the scope of the present invention in any way, and all technical solutions obtained by using equivalent substitution modes and the like fall within the scope of the present invention.
The utility model discloses the part that does not relate to all is the same with prior art or can adopt prior art to realize.
Claims (8)
1. A connecting structure of a precast concrete pile column and a foundation pit supporting reinforced concrete inner support is characterized by comprising a precast concrete pipe pile, a first reinforced concrete inner support, a second reinforced concrete inner support and a third reinforced concrete inner support, wherein the first reinforced concrete inner support is arranged around the top of the precast concrete pipe pile in a surrounding manner through a concrete pile cap, the lower end of the concrete pile cap is provided with a concrete column in the pipe pile, a pile cap anchor bar welded with an end plate of the pipe pile is arranged in the concrete pile cap, and the concrete pile cap, the concrete column in the pipe pile and the first reinforced concrete inner support are of an integrated pouring structure; the second reinforced concrete inner supports are arranged below the first reinforced concrete inner supports at intervals and are arranged around the precast concrete pipe pile in a surrounding manner through a first reinforced concrete ring beam, vertical lifting ribs are connected between the first reinforced concrete ring beam and the concrete pile cap, and the first reinforced concrete ring beam and the second reinforced concrete inner supports are of an integrated pouring structure; the third reinforced concrete inner supports are arranged below the second reinforced concrete inner supports at intervals and are arranged around the precast concrete tubular pile in a surrounding mode through second reinforced concrete ring beams, and the second reinforced concrete ring beams and the third reinforced concrete inner supports are of an integral pouring structure.
2. The connecting structure of the precast concrete pile and the reinforced concrete inner support of the foundation pit support according to claim 1, wherein the concrete pile cap is square, a cubic reinforcement cage is arranged in the concrete pile cap, and an inner support reinforcement is arranged in the first reinforced concrete inner support and is arranged in the concrete pile cap in a penetrating way and bound with the cubic reinforcement cage.
3. The connecting structure of the precast concrete pile column and the inner reinforced concrete support of the foundation pit support according to claim 1, wherein a ring beam ring rib, a ring beam stirrup and a ring beam waist rib are arranged in the first reinforced concrete ring beam, and the inner reinforced concrete support of the second reinforced concrete support is provided with an inner reinforced steel bar, and the front end of the inner reinforced steel bar extends into the first reinforced concrete ring beam.
4. The connecting structure of the precast concrete pile and the reinforced concrete inner support of the foundation pit support according to claim 1, wherein a ring beam ring rib, a ring beam stirrup and a ring beam waist rib are arranged in the second reinforced concrete ring beam, the third reinforced concrete inner support is provided with an inner support steel bar, and the front end of the inner support steel bar extends into the second reinforced concrete ring beam.
5. The connecting structure of the precast concrete pile and the reinforced concrete inner support for foundation pit support according to claim 3 or 4, wherein the ends of the ring beam and the ring beam waist bar are respectively connected by adopting positive and negative wire connecting sleeves.
6. The connection structure of the precast concrete pile column and the inner reinforced concrete support of the foundation pit support according to claim 1 or 4, wherein a steel ferrule is arranged on the inner side wall of the second reinforced concrete ring beam close to the precast concrete pipe pile, the steel ferrule is sleeved around the precast concrete pipe pile, the outer side wall of the steel ferrule is poured together with the second reinforced concrete ring beam, and the inner side wall and the outer wall of the precast concrete pipe pile are tightly poured through structural adhesive.
7. The connecting structure of the precast concrete pile column and the reinforced concrete inner support of the foundation pit support according to claim 6, wherein the steel hoops are formed by welding two semicircular steel sleeves at a joint.
8. The connection structure of the precast concrete pile column and the reinforced concrete inner support of the foundation pit support according to claim 6, wherein shear resistant studs and shear resistant ring bars are welded around the steel hoops.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222854711.8U CN218437104U (en) | 2022-10-28 | 2022-10-28 | Connecting structure of precast concrete pile and foundation pit supporting reinforced concrete inner support |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222854711.8U CN218437104U (en) | 2022-10-28 | 2022-10-28 | Connecting structure of precast concrete pile and foundation pit supporting reinforced concrete inner support |
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| CN218437104U true CN218437104U (en) | 2023-02-03 |
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| CN202222854711.8U Active CN218437104U (en) | 2022-10-28 | 2022-10-28 | Connecting structure of precast concrete pile and foundation pit supporting reinforced concrete inner support |
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- 2022-10-28 CN CN202222854711.8U patent/CN218437104U/en active Active
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