CN219157690U - Double PC (polycarbonate) construction method combined pile enclosure structure - Google Patents
Double PC (polycarbonate) construction method combined pile enclosure structure Download PDFInfo
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- CN219157690U CN219157690U CN202222835786.1U CN202222835786U CN219157690U CN 219157690 U CN219157690 U CN 219157690U CN 202222835786 U CN202222835786 U CN 202222835786U CN 219157690 U CN219157690 U CN 219157690U
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Abstract
The utility model relates to the field of foundation pit support, in particular to a double-row PC (polycarbonate) construction method combined pile support structure. The enclosure structure mainly comprises a front steel pipe pile, a rear steel pipe pile, a U-shaped steel sheet pile, a front steel pipe pile crown beam, a rear steel pipe pile crown beam and a reinforced concrete connection structure. Constructing a front row of steel pipe piles, a rear row of steel pipe piles and hot-rolled U-shaped steel sheet piles in place by adopting piling machinery, wherein the front row of steel pipe piles and the U-shaped steel sheet piles are in arc-shaped lap joint through locking notches of the steel pipe pile rabbets and the U-shaped steel sheet piles; after the steel pipe piles and the tube sheet piles are constructed in place, steel bars are bound on site at the upper part and concrete is poured to form a front row of steel pipe pile crown beams, a rear row of steel pipe pile crown beams, reinforced concrete connecting beams or reinforced concrete connecting plates, so that an integral rigid frame is formed, and a cantilever type enclosure structure is integrally formed. The building envelope has the advantages of high construction efficiency, low cost, short construction period, small influence on surrounding buildings, no influence on later-stage facility construction, and good economic and social benefits.
Description
Technical Field
The utility model relates to the field of foundation pit support, in particular to a double-row PC (polycarbonate) construction method combined pile support structure.
Background
At present, cantilever type foundation pit bracing forms commonly used in foundation pit engineering mainly comprise a gravity type retaining wall of a cement-soil stirring pile, a single-row bored pile, a double-row bored pile and the like. The following problems are mainly present: and (1) large deformation and large influence on the surrounding environment. The gravity type retaining wall of the cement mixing pile and the single-row bored pile have small rigidity, the deformation is generally a few centimeters, and some projects even exceed ten centimeters, so that the operation of the building (structure) and pipelines around the foundation pit is influenced. (2) effect post construction. Various pipelines around the building (structure) are more, and the building is inevitably required to be chiseled off in the process of pipeline application in the later stage, so that the construction period and the engineering cost are increased. (3) high cost and environmental protection. The gravity retaining wall of the cement-soil mixing pile mainly adopts cement, the bored pile mainly adopts concrete and reinforcing steel bars, and the engineering cost is high and is not environment-friendly. (4) the construction period is relatively long. The gravity type retaining wall of the cement mixing pile and the bored pile can play a role after the cement mixing pile needs maintenance and reaches the strength.
Based on the above conditions, the research has important significance on the cantilever type enclosure form with small influence on surrounding building (construction) and pipelines, environmental protection, cost saving, construction period saving and convenient later construction.
Disclosure of Invention
The utility model aims to provide a double-row PC construction method combined pile enclosure structure and a construction method thereof, which are used for overcoming the defects of the cantilever type foundation pit enclosure form commonly used in the foundation pit engineering at present.
In order to achieve the above object, the technical scheme of the present utility model is as follows:
the utility model provides a double-row PC construction method combined pile enclosure structure which mainly comprises a front row of steel pipe piles, a rear row of steel pipe piles, hot-rolled U-shaped steel sheet piles, a front row of steel pipe pile crown beams, a rear row of steel pipe pile crown beams, a middle reinforced concrete connection structure, pile welding parts, stiffening round steel plates and steel pipe pile rabbets, wherein the steel pipe pile rabbets are welded on two sides of the front row of steel pipe piles; the pile welding parts are positioned at the joints of the front steel pipe piles, the front steel pipe pile crown beams and the rear steel pipe piles, so as to achieve the effect of resisting shearing force, and stiffening round steel plates are welded at the inner sides of the front steel pipe piles and the rear steel pipe piles; the front steel pipe piles and the U-shaped steel plate piles are mutually locked into arc-shaped lap joints through the lock catches of the steel pipe pile rabbets, the functions of water stopping, siltation stopping, sand stopping and the like are achieved, the distance between the adjacent front steel pipe piles is adjustable, and a plurality of U-shaped steel plate piles are arranged between the adjacent front steel pipe piles.
Further, the pile welding piece is a steel ring, strip steel or round steel.
Further, the front steel pipe piles and the rear steel pipe piles form an integral rigid frame through a reinforced concrete connection structure. Preferably, the thickness of the reinforced concrete connecting plate is not less than 200mm.
Preferably, the reinforced concrete connecting structure is a reinforced concrete connecting beam.
Preferably, the reinforced concrete connection structure is a reinforced concrete connection plate.
Further, the section height of the pile welding piece is more than or equal to 16mm, and the length of the lower edge of the pile welding piece from the lower edge of the front pile crown beam and the rear pile crown beam is not less than 100mm.
Further, the width of the cross section of the front and rear rows of steel pipe pile crown beams is more than 400mm (the width of each two sides is 200 mm) than the cross section of the steel pipe pile, so that the steel pipe pile crown beam steel bars are ensured to have enough arrangement spaces on the two sides of the steel pipe pile.
Further, pit bottom reinforcing structures are arranged on the side parts of the front-row steel pipe piles.
In addition, the utility model also provides a construction method of the double-row PC construction method combined pile enclosure structure, which mainly comprises the following steps:
welding steel pipe pile rabbets on two sides of the front row of steel pipe piles; pile welding pieces are welded at the joints of the front steel pipe piles, the rear steel pipe piles and the pile crown beams, and stiffening round steel plates are welded at the inner sides of the front steel pipe piles and the rear steel pipe piles;
constructing a front row of steel pipe piles, a rear row of steel pipe piles and hot-rolled U-shaped steel sheet piles in place by adopting piling machinery, wherein the front row of steel pipe piles and the U-shaped steel sheet piles are in arc-shaped lap joint through locking notches of the steel pipe pile rabbets and the U-shaped steel sheet piles;
after the steel pipe piles and the tube sheet piles are constructed in place, steel bars are bound on site at the upper part and concrete is poured to form a front row of steel pipe pile crown beams, a rear row of steel pipe pile crown beams, reinforced concrete connecting beams or reinforced concrete connecting plates, so that an integral rigid frame is formed, and a cantilever type enclosure structure is integrally formed.
Further, according to soil property conditions and foundation pit deformation control requirements, pit bottom reinforcing structures with certain depth and width can be constructed in front of the front row of steel pipe piles, and cement soil stirring piles and high-pressure jet grouting piles can be adopted for pit bottom reinforcement.
The utility model has the following beneficial effects:
(1) The rigidity is big, and the deformation is little, and is little to surrounding environment influence. Compared with the gravity retaining wall, the cast-in-place pile and other concrete structures, the foundation pit maintenance type adopted by the utility model is a double-row PC construction method combined pile structure, and has the advantages of high rigidity, small foundation pit deformation and small influence on the surrounding environment. And (2) the influence on the later construction is small. The enclosure type is mainly a steel structure, only a top crown beam and a connecting beam (connecting plate) are of a concrete structure, the amount of concrete engineering needing to be chiseled is small, steel sheet piles can be directly pulled out, and the influence on later construction is small. And (3) the cost is low, and the used materials are environment-friendly. The utility model only uses concrete when pouring the tubular pile crown beam and the connecting beam (connecting plate), the steel pipe pile is used as a main stress structure, no extra steel bars or cement are needed, the waste condition is effectively reduced, and the engineering cost is low. (4) short construction period. The utility model adopts the steel-concrete structure, the steel pipe pile is integrally poured after being welded by the U-shaped steel plate pile, the construction efficiency is high, the maintenance period of the steel pipe pile with the main stress structure is short, and compared with the gravity retaining wall and the bored pile, the utility model can effectively shorten the construction period.
Drawings
FIG. 1 is a cross-sectional view of an enclosure of embodiment 1 of the present utility model;
FIG. 2 is a plan view of an enclosure according to embodiment 1 of the present utility model;
FIG. 3 is a schematic view of the steel pipe pile top inner stiffened round steel plate and outer pile weldment of the present utility model;
FIG. 4 is a schematic view of the welding of the outer side of a steel pipe pile with a pile welding member according to the present utility model;
FIG. 5 is a three-dimensional schematic of example 1 of the present utility model;
FIG. 6 is a cross-sectional view of an enclosure of embodiment 2 of the present utility model;
FIG. 7 is a plan view of an enclosure of embodiment 2 of the present utility model;
FIG. 8 is a three-dimensional schematic of example 2 of the utility model;
FIG. 9 is a detailed view of the overlapping construction of the steel pipe pile and the U-shaped steel sheet pile of the present utility model;
fig. 10 is a three-dimensional schematic view of the steel pipe pile top inner stiffened steel plate and outer pile weldment of the present utility model.
The numbers in the figure are as follows: 1. front steel pipe piles; 2. rear steel pipe piles; 3. hot rolling the U-shaped steel sheet pile; 4. front steel pipe pile crown beams; 5. a rear steel pipe pile crown beam; 6. reinforced concrete connecting beam; 7. reinforced concrete connecting plates; 8. a pile welding member; 9. stiffening round steel plates; 10. a steel pipe pile tongue-and-groove; 11. pit bottom reinforcement; 12. a building is to be constructed.
Detailed Description
Other advantages and effects of the present utility model will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present utility model with reference to specific examples. The utility model may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present utility model. It should be noted that the illustrations provided in the following embodiments merely illustrate the basic idea of the present utility model by way of illustration, and the following embodiments and features in the embodiments may be combined with each other without conflict.
Wherein the drawings are for illustrative purposes only and are shown in schematic, non-physical, and not intended to limit the utility model; for the purpose of better illustrating embodiments of the utility model, certain elements of the drawings may be omitted, enlarged or reduced and do not represent the size of the actual product; some well known structures in the drawings and omission of the description thereof will be understood by those skilled in the art.
Example 1
Referring to fig. 1 to 5 in combination, the present embodiment discloses a double-row PC construction method composite pile enclosure structure, which includes a front row of steel pipe piles 1, a rear row of steel pipe piles 2, hot rolled U-shaped steel sheet piles 3, a front row of steel pipe pile crown beams 4, a rear row of steel pipe pile crown beams 5, and reinforced concrete connecting beams 6. Wherein, the outer side of the front steel pipe pile 1 is welded with a steel ring or strip steel or a tongue-and-groove 10 of the steel pipe pile, and the inner side is welded with a stiffening round steel plate 9. The two sides of the front steel pipe pile 1 are welded with steel pipe pile rabbets 10; the outer sides of the joints of the front steel pipe piles 1 and the rear steel pipe piles 2 and the pile crown beams 4 and 5 are welded with steel rings (strip steel or round steel) 8, and the inner sides are welded with stiffening round steel plates 9; constructing the front steel pipe pile 1, the rear steel pipe pile 2 and the hot-rolled U-shaped steel sheet pile 3 in place by adopting piling machinery, wherein the front steel pipe pile 1 and the U-shaped steel sheet pile 3 are in arc-shaped lap joint through a steel pipe pile tongue-and-groove 10 and a lock catch mutual locking notch of the U-shaped steel sheet pile 3; after the steel pipe piles and the tube sheet piles are constructed in place, steel bars are bound on site at the upper part and concrete is poured to form a front row of steel pipe pile crown beams 4, a rear row of steel pipe pile crown beams 5 and reinforced concrete connecting beams 6, so that an integral rigid frame is formed, and a cantilever type enclosure structure is integrally formed.
Preferably, the front steel pipe pile 1 and the rear steel pipe pile 2 form an integral rigid frame through the front steel pipe pile crown beam 4, the rear steel pipe pile crown beam 5 and the reinforced concrete connecting beam 6.
Preferably, the steel pipe pile rabbets 10 are welded on the two sides of the front steel pipe pile 1, and the front steel pipe pile 1 and the U-shaped steel plate pile 3 are in arc-shaped lap joint through the steel pipe pile rabbets 10 and the lock catch interlocking notch of the U-shaped steel plate pile 3.
Preferably, the spacing between the front steel pipe piles 1 can be adjusted by the number of the U-shaped steel pipe piles 3, and a combination mode of 0 steel pipe piles, 1 steel pipe pile, 2 steel pipe piles or a plurality of steel pipe piles and the like are formed between two adjacent steel pipe piles.
Preferably, steel rings (strip steel or round steel) 8 are arranged at the joints of the front and rear rows of steel pipe piles 1, 2 and pile top crown beams 4, 5 so as to achieve the effect of resisting shearing force. The height of the section of the steel ring (strip steel or round steel) 8 is more than or equal to 16mm, and the length of the lower edge of the steel ring is not less than 100mm from the lower edge of the pile crown beam 4 and 5.
Preferably, the widths of the sections of the front and rear rows of steel pipe pile crown beams 4 and 5 are more than 400mm (the widths of the two sides are 200mm respectively) than the sections of the steel pipe piles, so that the crown beams 4 and 5 are ensured to have enough arrangement spaces on the two sides of the steel pipe piles.
Preferably, according to soil conditions and foundation pit deformation control requirements, pit bottom reinforcement 11 with a certain depth and width can be constructed in front of the foundation pit bottom and the front row of steel pipe piles 1, and cement soil stirring piles and high-pressure jet grouting piles can be adopted for pit bottom reinforcement 11.
Example 2
Referring to fig. 6-8, steel bars are bound on site and concrete is poured to form a front steel pipe pile crown beam 4, a rear steel pipe pile crown beam 5 and a reinforced concrete connecting beam 6, and the front steel pipe pile 1 and the rear steel pipe pile 2 form an integral rigid frame through the front steel pipe pile crown beam 4, the rear steel pipe pile crown beam 5 and the reinforced concrete connecting plate 7. The procedure is as in example 1.
The construction method of examples 1 and 2 includes the following (but is not limited to) steps:
the first step: the two sides of the front steel pipe pile 1 are welded with steel pipe pile rabbets 10; steel rings (strip steel or round steel) are welded at the outer sides of the joints of the front steel pipe piles 1 and the rear steel pipe piles 2 and pile crown beams 4 and 5, and stiffening round steel plates 9 are welded at the inner sides;
and a second step of: according to soil conditions and foundation pit deformation control requirements, a pit bottom reinforcement 11 structure with a certain depth and width is constructed at a preset position of a front row of steel pipe piles, and cement soil stirring piles and high-pressure jet grouting piles can be adopted for pit bottom reinforcement 11.
And a third step of: constructing the front steel pipe pile 1, the rear steel pipe pile 2 and the hot-rolled U-shaped steel sheet pile 3 in place by adopting piling machinery, wherein the front steel pipe pile 1 and the U-shaped steel sheet pile 3 are in arc-shaped lap joint through a steel pipe pile tongue-and-groove 10 and a lock catch mutual locking notch of the U-shaped steel sheet pile 3;
fourth step: after the steel pipe piles and the tube sheet piles are constructed in place, steel bars are bound on the upper part on site and concrete is poured, so that a front steel pipe pile crown beam 4, a rear steel pipe pile crown beam 5 and a reinforced concrete connecting beam 6 are formed, an integral rigid frame is formed, and a cantilever type enclosure structure is integrally formed.
The above description is only illustrative of the preferred embodiments of the present utility model and is not intended to limit the scope of the present utility model, and any alterations and modifications made by those skilled in the art based on the above disclosure shall fall within the scope of the appended claims.
Claims (8)
1. The utility model provides a double PC worker method composite pile envelope, includes preceding steel-pipe pile (1), back row steel-pipe pile (2), hot rolling U shaped steel sheet pile (3), preceding steel-pipe pile crown beam (4), back row steel-pipe pile crown beam (5), middle reinforced concrete connection structure, stake weldment (8), stiffening round steel sheet (9), steel-pipe pile tongue-and-groove (10), characterized in that, steel-pipe pile tongue-and-groove (10) are welded to preceding steel-pipe pile (1) both sides; pile welding pieces (8) are welded on the outer sides of the front-row steel pipe piles (1) and the rear-row steel pipe piles (2), the pile welding pieces (8) are positioned at the joints of the front-row steel pipe piles (1) and the front-row steel pipe pile crown beams (4) and the joints of the rear-row steel pipe piles (2) and the rear-row steel pipe pile crown beams (5), and stiffening round steel plates (9) are welded on the inner sides of the front-row steel pipe piles (1) and the rear-row steel pipe piles (2); the front steel pipe piles (1) and the U-shaped steel plate piles (3) are mutually locked to form arc-shaped lap joints through the lock catches of the steel pipe pile tongue-and-groove (10), the distance between the adjacent front steel pipe piles (1) is adjustable, and a plurality of U-shaped steel plate piles (3) are arranged between the adjacent front steel pipe piles.
2. The double-row PC construction method combined pile enclosure structure according to claim 1, wherein the pile welding parts (8) are steel rings, strip steel or round steel.
3. The double-row PC construction method combined pile enclosure structure according to claim 2, wherein the front row steel pipe piles (1) and the rear row steel pipe piles (2) form an integral rigid frame through a reinforced concrete connection structure.
4. A double row PC construction method composite pile envelope according to claim 3, characterized in that the reinforced concrete connection structure is a reinforced concrete coupling (6).
5. A double row PC construction method composite pile enclosure according to claim 3, characterized in that the reinforced concrete connection structure is a reinforced concrete connection plate (7).
6. The double-row PC construction method combined pile enclosure structure according to claim 1, wherein the height of the section of the pile welding piece (8) is more than or equal to 16mm, and the length of the lower edge of the pile welding piece is not less than 100mm from the lower edges of the front row steel pipe pile crown beam (4) and the rear row steel pipe pile crown beam (5).
7. The double-row PC construction method composite pile enclosure structure of claim 1, wherein,
the section width of the front steel pipe pile crown beam (4) and the rear steel pipe pile crown beam (5) is more than 400mm larger than the section of the steel pipe pile, so that the steel bars of the front steel pipe pile crown beam (4) and the rear steel pipe pile crown beam (5) are ensured to have enough arrangement spaces on two sides of the steel pipe pile.
8. The double-row PC construction method combined pile enclosure structure of claim 1, wherein pit bottom reinforcement (11) structures are arranged on the side parts of the front row of steel pipe piles (1).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202222835786.1U CN219157690U (en) | 2022-10-27 | 2022-10-27 | Double PC (polycarbonate) construction method combined pile enclosure structure |
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| CN202222835786.1U CN219157690U (en) | 2022-10-27 | 2022-10-27 | Double PC (polycarbonate) construction method combined pile enclosure structure |
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| CN219157690U true CN219157690U (en) | 2023-06-09 |
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| CN202222835786.1U Active CN219157690U (en) | 2022-10-27 | 2022-10-27 | Double PC (polycarbonate) construction method combined pile enclosure structure |
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