CN114960684A - Assembly type deep foundation pit support low-carbon pile plate structure and construction method thereof - Google Patents

Abstract

The invention discloses an assembled deep foundation pit supporting low-carbon pile plate structure and a construction method thereof, wherein the assembled deep foundation pit supporting low-carbon pile plate structure comprises a plurality of profile piles which are sequentially arranged at equal intervals along the transverse direction or the longitudinal direction, and a plate which is arranged between any two adjacent sets of profile piles along the vertical direction, two ends of the plate are respectively detachably connected with the two sets of profile piles, any one set of profile pile comprises a plurality of components which are sequentially connected end to end along the vertical direction, a plurality of reserved holes for anchor cables to penetrate through are formed in the plurality of components, and a water stopping structure and an inserting structure for connecting the two sets of components are arranged between any two adjacent sets of components. Through the mode, the invention has simple structure, the profile piles are formed by splicing a plurality of prefabricated components, and the plates are inserted between two adjacent groups of profile piles, so that the overall construction speed is high, the strength of the supporting structure is enhanced, the deformation and settlement of surrounding buildings are reduced, and the invention can be applied to various scenes and flexible construction.

Description

Assembly type deep foundation pit support low-carbon pile plate structure and construction method thereof

Technical Field

The invention relates to the technical field of foundation pit support, in particular to an assembled low-carbon pile plate structure for deep foundation pit support and a construction method thereof.

Background

Along with the construction of cities, various types of deep, large and complex foundation pit engineering are increasing, particularly, the urban foundation pit is influenced by the surrounding existing buildings, structures and other environments, has high deformation requirement and strong impermeability requirement, and a diaphragm wall can just meet the two requirements, so the diaphragm wall is often used as one of important supporting forms of the urban large foundation pit. However, since the diaphragm wall has an equal cross section, the excavated earth is large, the diaphragm wall is poorly adapted to the urban environment sensitive to the environment, and the flexural strength of the reinforced concrete cannot be fully exerted in a short time. In addition, the excavation timeliness of the diaphragm wall is poor, and the diaphragm wall needs site construction and is long in construction period, so that the construction period of the whole project is prolonged, the supporting efficiency is low, and the engineering risk is high.

The prior art discloses a guide slot assembled inter-pile plate device, including fender apron and a plurality of pile body that set up in the side slope soil body, the pile body is arranged alternately, and the upper end of pile body extends up, forms the pile body that extends outside the side slope soil body, is equipped with the guide slot in the lateral wall of pile body, and the both sides of fender apron are inserted respectively and are located in the guide slot of two adjacent pile bodies. Although the technology can realize the hoisting construction of the soil retaining plate and the pile body, the construction period is shortened, and the soil body on the soil retaining side does not need to be excavated, the pile body of the technology is of an integrated structure, the construction period is still longer, the technology is applicable to few scenes, and the impermeability is poorer.

Therefore, it is necessary to design an assembly type deep foundation pit supporting low-carbon pile plate structure which has a simple structure, can adapt to an environment-sensitive urban environment, can reduce water and soil loss, can efficiently exert the bending resistance of reinforced concrete, can be quickly prefabricated by a factory and can be quickly constructed on site and a construction method thereof.

Disclosure of Invention

In order to overcome the problems, the invention provides an assembled deep foundation pit supporting low-carbon pile plate structure and a construction method thereof.

In order to achieve the purpose, the invention adopts the technical scheme that:

the utility model provides an assembled deep basal pit struts low carbon pile plate structure, includes along horizontal or vertical equidistant a plurality of shaped piles that set gradually and set up in arbitrary adjacent two sets of along vertical direction plate between the shaped pile, the both ends of plate respectively with two sets of the connection can be dismantled to the shaped pile, and is arbitrary a set of the shaped pile all includes along vertical direction a plurality of components of end to end connection in proper order, all be provided with a plurality of preformed holes that supply the anchor rope to pass on a plurality of components, be provided with between arbitrary adjacent two sets of components stagnant water structure and supply two sets of the plug-in structure of component connection.

Further, the plurality of members include a bottom member disposed at a bottom end, a top member disposed at a top end, and a plurality of intermediate members disposed between the bottom member and the top member;

the inserting structure comprises mortises arranged at the top ends of the bottom component and the middle component and tenons arranged at the bottom ends of the top component and the middle component, and the tenons are matched with the mortises in shapes and are contained in the mortises.

Furthermore, the water stopping structure comprises an upper water stopping tank arranged at the top ends of the bottom component and the middle component along the annular direction, and a lower water stopping tank arranged at the bottom ends of the top component and the middle component along the annular direction, wherein the upper water stopping tank is matched with the lower water stopping tank in shape so as to accommodate a water stopping ring between the upper water stopping tank and the lower water stopping tank.

Further, the both ends of component are close to adjacent two sets of the both ends of shaped pile all are provided with the joint groove that is the setting of type structure along vertical direction, the joint groove runs through the upper and lower both ends of component, the both ends of plate be provided with hold in joint in the joint inslot is protruding, the joint protruding with the shape looks adaptation in joint groove.

Furthermore, the square piles comprise square piles arranged in a square structure and L-shaped piles arranged in an L-shaped structure, the square piles are used for connecting two groups of plates arranged in parallel, and the L-shaped piles are used for connecting two groups of plates arranged vertically.

Furthermore, the square type pile comprises a plurality of square members arranged along the vertical direction, and the L-shaped pile comprises a plurality of L-shaped members arranged along the vertical direction.

Further, the mortises arranged on the square component are arranged into a group and are positioned at the center of the group; the mortises arranged on the L-shaped component are arranged into three groups and distributed in an L shape.

Furthermore, the preformed hole is arranged along the vertical direction and penetrates through the upper end and the lower end of the component; four groups of the preformed holes are arranged on the square component along the circumferential direction, and seven groups of the preformed holes are arranged on the L-shaped component along the circumferential direction.

Further, the distance between two adjacent groups of profile piles is 4-8 m, and the thickness of the plate is 20-40 cm.

The construction method for the fabricated deep foundation pit supporting low-carbon pile plate comprises the following steps:

s1, prefabricating the component according to the design drawing, and selecting the anchor cable meeting the strength parameter;

s2, performing construction according to construction lofting, slurry preparation, mechanical or manual success and hole cleaning;

s3, splicing the anchor cable with the bottom member, sequentially splicing the middle members, splicing the top member, and applying prestress to the anchor cable after splicing;

s4, excavating and cleaning the wall of the retaining plate, and inserting plates after cleaning;

and S5, detecting the supporting and blocking effect and the water stopping effect of the pile plate structure.

Compared with the prior art, the invention has the beneficial effects that:

1. the fabricated low-carbon pile-plate structure for deep foundation pit support and the construction method thereof are characterized in that the type piles are formed by splicing a plurality of prefabricated components, plates are inserted between two adjacent groups of type piles, the type piles comprise square type piles for straight-line section construction and L type piles for corner construction, the low-carbon pile-plate structure can be suitable for foundation pit support of limited areas, can also be used for areas with high deformation requirements, is flexible in arrangement, and can increase or reduce the distance between the piles according to the influence range of existing buildings.

2. According to the fabricated deep foundation pit supporting low-carbon pile plate structure and the construction method thereof, the plurality of groups of preformed holes are circumferentially arranged on each component, so that each component is connected with the anchor cable when being spliced, and the two ends of the retaining plate are spliced with the profile pile through the splicing structures, so that the rigidity of the pile is increased, the thickness of the plate is reduced, the rigidity of the supporting structure can be stronger increased, the deformation and settlement of surrounding buildings are reduced, and the supporting and retaining efficiency is improved.

3. According to the fabricated deep foundation pit supporting low-carbon pile plate structure and the construction method thereof, the overall construction speed is high by adopting the on-site precast block assembling construction mode, the construction period of the foundation pit support structure can be shortened, the exposure time of the foundation pit is shortened, and the safety of the foundation pit is improved.

4. According to the fabricated deep foundation pit supporting low-carbon pile plate structure and the construction method thereof, the prefabricated parts are prefabricated in a factory, so that the amount of waste gas, waste liquid and waste soil in a construction site is reduced, a green and energy-saving structure is realized, and the fabricated deep foundation pit supporting low-carbon pile plate structure has high economic, social and environmental values and a wide popularization prospect.

Drawings

FIG. 1 is a schematic structural diagram of an assembled deep foundation pit supporting low-carbon pile plate structure of the invention;

FIG. 2 is a schematic structural diagram of a section pile of the fabricated deep foundation pit supporting low-carbon pile plate structure;

FIG. 3 is a schematic structural diagram of an intermediate member of the fabricated deep foundation pit supporting low-carbon pile plate structure of the invention;

fig. 4 is a schematic bottom structural view of an intermediate member of the fabricated deep foundation pit supporting low-carbon pile plate structure of the invention;

FIG. 5 is a connection schematic diagram of the fabricated deep foundation pit supporting low-carbon pile plate structure of the invention;

the parts in the drawings are numbered as follows: 10. forming piles; 11. a top member; 12. an intermediate member; 121. mortises; 122. an upper water stopping tank; 123. reserving a hole; 124. a clamping groove; 125. a tenon; 126. a lower water stopping tank; 13. a base member; 20. a plate member.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.

It should be noted that, in order to avoid obscuring the present invention with unnecessary details, only the structures and processing steps closely related to the scheme of the present invention are shown in the drawings, and other details not closely related to the present invention are omitted.

In addition, it is also to be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Examples

As shown in fig. 1 to 2, an assembled deep foundation pit supporting low-carbon pile plate structure 100 includes a plurality of type piles 10 arranged in sequence at equal intervals along the horizontal or longitudinal direction, and a plate 20 arranged between any two adjacent groups of type piles 10 along the vertical direction. The both ends of plate 20 can be dismantled with two sets of type stake 10 respectively and be connected to separately construct type stake 10 and plate 20, shortened construction cycle greatly, and the assembled structure of plate 20 and type stake 10 not only can the exclusive use, also can be used with conventional ground even wall combination, the construction is nimble, applicable in the district of different application conditions. In addition, an arbitrary group of profile pile 10 all includes a plurality of components of following vertical direction end to end connection in proper order, all is provided with a plurality of preformed holes 123 that supply the anchor rope to pass on a plurality of components to with each component connection, ensure the bulk rigidity of profile pile 10, and be provided with between arbitrary adjacent two sets of components and stop water structure and supply the grafting structure of two sets of component connections. The stagnant water structure can prevent to ooze between two adjacent components, and the grafting structure is convenient for each component and is counterpointed the back concatenation fast, and connects the steadiness good.

So set up, form through splicing a plurality of prefabricated component with type stake 10 to peg graft plate 20 between two adjacent types of stake 10, and type stake 10 is including the square type stake that is used for the straightway construction and the L type stake that is used for the corner to be under construction, can be applicable to the excavation supporting of restricted district, also can be used to the district that the deformation requires height, arranges in a flexible way, can be according to the influence scope of existing building, increases or reduces the distance between the stake.

As shown in fig. 2-4, in some embodiments, the number of members includes a bottom member 13 disposed at a lowermost end, a top member 11 disposed at a uppermost end, and a number of intermediate members 12 disposed between the bottom member 13 and the top member 11. The cross-sectional shapes and sizes of the bottom member 13, the top member 11 and the middle member 12 are the same, so that the integral square structure of the pile 10 formed by splicing the bottom member, the top member and the middle member is ensured, and the rigidity and the strength of the pile 10 are ensured.

The inserting structure includes a mortise 121 disposed at the top ends of the bottom member 13 and the middle member 12, and a tenon 125 disposed at the bottom ends of the top member 11 and the middle member 12, wherein the tenon 125 is adapted to the shape of the mortise 121 and is accommodated in the mortise 121. In particular, the height of the tenon 125 is the same as the depth of the mortise 121 to ensure that the end surfaces of the upper and lower members joined to each other are abutted. The plug-in structure that tenon 125 and mortise 121 constitute can be fast with each component counterpoint concatenation, improves the efficiency of construction.

As shown in fig. 3 to 4, in some embodiments, the water stopping structure includes an upper water stopping tank 122 disposed at top ends of the bottom member 13 and the middle member 12 in a circumferential direction, and a lower water stopping tank 126 disposed at bottom ends of the top member 11 and the middle member 12 in a circumferential direction. The shape of the upper water stopping tank 122 is matched with that of the lower water stopping tank 126 so as to accommodate the water stopping ring between the upper water stopping tank 122 and the lower water stopping tank 126, when the two groups of members are spliced, the upper water stopping tank 122 and the lower water stopping tank 126 at the connecting ends are aligned and then tightly press the water stopping ring, so that the connection of the two groups of members is sealed, and water seepage is prevented. The water stop ring is preferably a rubber sealing ring.

As shown in fig. 3 to 4, in some embodiments, the two ends of the member close to the two adjacent groups of profile piles 10 are provided with clamping grooves 124 in a convex structure along the vertical direction, and the inner ends of the clamping grooves 124 are large ends and the outer ends thereof are small ends. Joint groove 124 runs through the upper and lower both ends of component to plate 20 passes the component completely, and plate 20's both ends are provided with the joint arch that holds in joint groove 124, and the shape looks adaptation of joint arch and joint groove 124, with the quick grafting of realization plate 20 and component, and easy dismounting.

The assembled design of the plate 20 and the members enables the span adjustable range between the two groups of the profiled piles 10 to be large and the use to be flexible. Preferably, the distance between two adjacent groups of profile piles 10 is 4-8 m, and the thickness of the plate 20 is 20-40 cm. The plate 20 is thin, and the thickness of the plate is far less than that of the member, so that the retaining pressure can be transmitted to the profile pile 10, and the plate 20 can conveniently stop water. The two ends of the retaining plate are spliced with the section piles 10 through the splicing structures, so that the rigidity of the piles is increased, the thickness of the plate is reduced, the rigidity of a supporting structure can be increased, the deformation and settlement of surrounding buildings are reduced, and the retaining efficiency is improved.

As shown in fig. 5, and referring to fig. 3-4, in some embodiments, profile piles 10 include square-shaped piles arranged in a square configuration, and L-shaped piles arranged in an L-shaped configuration. The square type pile is used for straight line segment construction to connect two sets of plate members 20 arranged in parallel with each other, and the L type pile is used for corner construction to connect two sets of plate members 20 arranged perpendicularly to each other.

The square type pile comprises a plurality of square components arranged along the vertical direction, and the L-shaped pile comprises a plurality of L-shaped components arranged along the vertical direction. Because profile pile 10 includes two kinds of structures, grafting structure, preformed hole 123, stagnant water groove and joint groove 124 on the component of different profile piles 10 all make the adaptability adjustment in this application protection scope.

Specifically, the mortises 121 provided on the square member are arranged in a group and located at the center thereof, and the tenons 125 are also located at the center of the square member, so as to ensure the stability of the square member when being connected. Mortises 121 disposed on the L-shaped members are arranged in three groups and distributed in an L-shape to be matched with the shape of the L-shaped members, so as to ensure the stability of connection. Meanwhile, the tenons 125 and the mortises 121 arranged on the L-shaped members are adaptively arranged, and are arranged in three groups and have positions corresponding to each other.

The prepared holes 123 are provided in a vertical direction and penetrate upper and lower ends of the members to connect the respective members to each other by anchor lines. Four groups of preformed holes 123 are arranged on the square component along the circumferential direction and are respectively positioned at four corners of the square component. Seven groups of preformed holes 123 are arranged on the L-shaped component along the annular direction.

The two sets of clipping grooves 124 disposed on the square member are symmetrically disposed at two ends of the square member. The two sets of clamping grooves 124 arranged on the L-shaped member are perpendicular to each other and are respectively positioned at the two sets of short sides of the L-shaped member.

In addition, the shapes of the upper water stop ring and the lower water stop ring arranged on the square member and the L-shaped member are matched with the shapes of the corresponding members, and are arranged on the outer ring of the preformed hole 123.

A construction method for supporting a low-carbon pile plate by an assembled deep foundation pit comprises the following steps:

and S1, prefabricating the components in a factory according to a design drawing, and selecting the anchor cable meeting the strength parameters.

In the step, the prefabricated parts are prefabricated in a factory, so that the amount of waste gas, waste liquid and waste soil in a construction site is reduced, a green and energy-saving structure is realized, and the prefabricated parts have high economic, social and environmental values and wide popularization prospect. In addition, the water stop ring and each component are integrally formed in a factory.

And S2, performing construction according to construction lofting, slurry preparation, mechanical or manual success and hole cleaning.

In the step, the mode of assembling and constructing the on-site precast blocks is adopted, the overall construction speed is high, the construction period of the foundation pit support structure can be shortened, the exposure time of the foundation pit is shortened, and the safety of the foundation pit is improved.

And S3, splicing the anchor cable with the bottom member 13, sequentially splicing the middle members 12, splicing the top member 11, and applying prestress to the anchor cable after splicing.

In this step, when the profile piles 10 are assembled, the L-shaped piles 10 are assembled first, and then the square-shaped piles 10 are assembled.

And S4, excavating the wall of the retaining plate, cleaning the wall, and inserting the plate 20 after cleaning.

And S5, detecting the supporting and blocking effect and the water stopping effect of the pile plate structure.

The above description is only for the purpose of illustrating the technical solutions of the present invention and is not intended to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; all the equivalent structures or equivalent processes performed by using the contents of the specification and the drawings of the invention, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims (10)

1. The utility model provides an assembled deep basal pit struts low carbon pile plate structure, its characterized in that includes along horizontal or vertical equidistant a plurality of type stake that set gradually and set up in arbitrary adjacent two sets of along vertical direction plate between the type stake, the both ends of plate respectively with two sets of the connection can be dismantled to the type stake, arbitrary a set of the type stake all includes along vertical direction a plurality of components of end to end connection in proper order, all be provided with a plurality of preformed holes that supply the anchor rope to pass on a plurality of components, be provided with between arbitrary adjacent two sets of components stagnant water structure and supply two sets of the grafting structure of component connection.

2. The fabricated deep foundation pit supporting low carbon sheet pile structure of claim 1, wherein the plurality of members comprises a bottom member disposed at a bottommost end, a top member disposed at a topmost end, and a plurality of intermediate members disposed between the bottom member and the top member;

the inserting structure comprises mortises arranged at the top ends of the bottom component and the middle component and tenons arranged at the bottom ends of the top component and the middle component, and the tenons are matched with the mortises in shape and contained in the mortises.

3. The fabricated deep foundation pit supporting low-carbon pile plate structure of claim 2, wherein the water stopping structure comprises an upper water stopping groove and a lower water stopping groove, the upper water stopping groove is arranged at the top ends of the bottom component and the middle component along the circumferential direction, the lower water stopping groove is arranged at the bottom ends of the top component and the middle component along the circumferential direction, and the upper water stopping groove and the lower water stopping groove are matched in shape to accommodate a water stopping ring between the upper water stopping groove and the lower water stopping groove.

4. The assembled deep foundation pit supporting low-carbon pile plate structure of claim 3, wherein clamping grooves which are arranged in a convex structure are formed in two ends, close to two adjacent groups of the type piles, of the component in the vertical direction, the clamping grooves penetrate through the upper end and the lower end of the component, clamping protrusions which are contained in the clamping grooves are formed in two ends of the plate, and the clamping protrusions are matched with the clamping grooves in shape.

5. The fabricated deep foundation pit supporting low-carbon pile-plate structure of claim 4, wherein the type piles comprise square type piles arranged in a square structure and L type piles arranged in an L type structure, the square type piles are used for connecting two groups of plate members arranged in parallel with each other, and the L type piles are used for connecting two groups of plate members arranged perpendicular to each other.

6. The fabricated deep foundation pit supporting low-carbon pile plate structure of claim 5, wherein the square type pile comprises a plurality of square members arranged in the vertical direction, and the L type pile comprises a plurality of L type members arranged in the vertical direction.

7. The fabricated deep foundation pit supporting low-carbon pile plate structure of claim 6, wherein the mortises provided on the square member are provided in a group and located at the center thereof; the mortises arranged on the L-shaped component are arranged into three groups and distributed in an L shape.

8. The fabricated deep foundation pit supporting low-carbon pile plate structure of claim 6, wherein the preformed hole is arranged in the vertical direction and penetrates through the upper end and the lower end of the component; four groups of the preformed holes are arranged on the square component along the circumferential direction, and seven groups of the preformed holes are arranged on the L-shaped component along the circumferential direction.

9. The fabricated deep foundation pit supporting low-carbon pile plate structure of claim 1, wherein the distance between two adjacent groups of profile piles is 4-8 m, and the thickness of the plate is 20-40 cm.

10. A construction method of an assembled deep foundation pit support low-carbon pile plate, which adopts the assembled deep foundation pit support low-carbon pile plate structure of any one of claims 1 to 9, and is characterized by comprising the following steps:

s1, prefabricating the components in a factory according to a design drawing, and selecting an anchor cable meeting the strength parameters;

s2, performing construction according to construction lofting, slurry preparation, mechanical or manual success and hole cleaning;

s3, splicing the anchor cable with the bottom member, sequentially splicing the middle members, splicing the top member, and applying prestress to the anchor cable after splicing;

s4, excavating and cleaning the wall of the retaining plate, and inserting plates after cleaning;

and S5, detecting the supporting and blocking effect and the water stopping effect of the pile plate structure.

Images