CN218090895U

CN218090895U - Foundation pit slope protection pile structure

Info

Publication number: CN218090895U
Application number: CN202222251917.1U
Authority: CN
Inventors: 马会莲; 邓琮威
Original assignee: Beijing Kaixinhaoda Engineering Technology Co ltd
Current assignee: Beijing Kaixinhaoda Engineering Technology Co ltd
Priority date: 2022-08-25
Filing date: 2022-08-25
Publication date: 2022-12-20
Anticipated expiration: 2032-08-25

Abstract

The utility model relates to a foundation pit slope protection pile structure, which mainly relates to the technical field of foundation pit supporting structures and comprises a plurality of cast-in-place piles which are uniformly and vertically arranged on the ground along the length direction of a foundation pit, a crown beam which is arranged at one end of the cast-in-place piles far away from the ground along the horizontal direction, a plurality of waist beams which are uniformly arranged along the length direction of the cast-in-place piles, a plurality of anchor rods which are uniformly arranged on the waist beams in a penetrating way along the length direction and a supporting plate which is arranged between two adjacent cast-in-place piles; one end of the anchor rod, which is far away from the waist beam, is fixedly connected with the foundation pit wall; and the supporting and protecting plate is abutted against the foundation pit wall. The support that this application has effectual advantage.

Description

Foundation pit slope protection pile structure

Technical Field

The application relates to the technical field of foundation pit supporting structures, in particular to a foundation pit slope protection pile structure.

Background

The slope protection pile, also called row pile, is a concrete foundation pit supporting structure which is arranged along the edge of a foundation pit and is formed by arranging certain pile types in a queue type to prevent the collapse of a side slope. The most common pile forms are reinforced concrete cast-in-situ bored piles and bored piles, in addition to i-steel piles or H-steel piles. The reinforced concrete cast-in-place pile structure is widely applied to supporting engineering of a deep foundation pit due to excellent bearing capacity.

Slope protection piles taking a reinforced concrete cast-in-place pile structure as a main body structure are generally arranged in a straight line shape, and because pile holes are linearly arranged, if the pile spacing is smaller, hole collapse easily occurs in adjacent pile holes in the cast-in-place pile construction process, so that the construction is inconvenient to efficiently develop; if the pile spacing is set to be larger, the foundation pit wall between the cast-in-place piles is easy to collapse due to improper support, which has certain influence on the safety of deep foundation pit operation.

In view of the above-mentioned related technologies, the inventor believes that, in a traditional reinforced concrete structure slope protection pile structure, when the pile spacing is large, the foundation pit wall support between the slope protection piles is weak, which easily causes the foundation pit wall to collapse.

SUMMERY OF THE UTILITY MODEL

In order to ensure high-efficient construction, guarantee the effect of strutting of slope protection stake to the foundation ditch wall under the condition that improves the stake interval, reduce the probability that foundation ditch wall takes place to collapse, improve the security of foundation ditch operation, this application provides a foundation ditch slope protection stake structure.

The application provides a pair of foundation ditch slope protection stake structure adopts following technical scheme:

a foundation pit slope protection pile structure comprises a plurality of cast-in-place piles uniformly and vertically arranged on the ground along the length direction of a foundation pit, a crown beam arranged at one end, far away from the ground, of the cast-in-place piles along the horizontal direction, a plurality of waist beams uniformly arranged along the length direction of the cast-in-place piles, a plurality of anchor rods uniformly penetrating the waist beams along the length direction, and a supporting plate arranged between every two adjacent cast-in-place piles; one end of the anchor rod, which is far away from the waist beam, is fixedly connected with the foundation pit wall; and the supporting and protecting plate is abutted against the foundation pit wall.

By adopting the technical scheme, the reinforced concrete structure consisting of the cast-in-place piles, the crown beams and the waist beams which are uniformly arranged along the length direction has a good supporting effect on the foundation pit wall, the basic function of the foundation pit supporting structure is realized, the anchor rod structures with two ends respectively fixedly connected with the waist beams and the foundation pit wall improve the structural strength of the waist beams and the load bearing capacity, the supporting plate fixedly arranged between the cast-in-place piles plays a supporting and protecting role on the part of the foundation pit wall which is lack of support between the cast-in-place piles, the supporting effect of the slope protection piles on the foundation pit wall is ensured under the condition of improving the pile spacing, the possibility of collapse of the foundation pit wall is reduced, and the safety of foundation pit operation is improved.

Optionally, the supporting plate includes a baffle vertically abutted against the foundation pit wall and arc plates arranged on two sides of the baffle; the inner diameter of the arc-shaped plate is equal to the outer diameter of the cast-in-place pile, and the arc-shaped plate is fixedly attached to the outer surface of the cast-in-place pile; a plurality of bolt holes are formed in the arc-shaped plate.

Through adopting above-mentioned technical scheme, the arc has played the effect of fixing the supporting plate structure on the bored concrete pile surface, and the baffle of laminating foundation pit wall has played the effect of supporting and protection to the foundation pit wall, and the bolt hole of seting up in advance on the arc can make things convenient for relevant operating personnel to fix the supporting plate on the bored concrete pile surface.

Optionally, a bolt guide cylinder is arranged along the axis direction of the bolt hole at the position where the bolt hole is formed on the plane of one side of the cast-in-place pile, which is far away from the arc-shaped plate.

Through adopting above-mentioned technical scheme, the bolt guide cylinder structure on the arc has played the guide effect to the bolt, can avoid the bolt to take place crooked at rotatory in-process, and then the phenomenon that bolt-up effect is not stable enough appears.

Optionally, a lifting lug is arranged on the plane of one side of the arc plate, which is far away from the cast-in-place pile.

Through adopting above-mentioned technical scheme, the lug structure that sets up on the arc can make things convenient for relevant operating personnel to lift by crane the supporting plate through hoisting equipment, has simplified the installation of a backplate, has shortened the time limit for a project of strutting.

Optionally, the anchor rod comprises a spiral drill fixed in the wall of the foundation pit, a screw rod with one end fixedly connected with the spiral drill and a knob sleeved on the screw rod; the screw rod is arranged on the waist rail in a penetrating mode, and the knob is in threaded fit with the screw rod and is abutted to the waist rail.

Through adopting above-mentioned technical scheme, the auger bit in the stock has played the effect of punching, and the screw rod has played the effect of connecting waist roof beam and auger bit, and the knob with screw rod screw-thread fit can support the waist roof beam tightly on the foundation pit wall through rotatory knob.

Optionally, a base plate is arranged between the knob and the waist rail; the width of the base plate is equal to the length of the waist rail.

Through adopting above-mentioned technical scheme, the backing plate that sets up between knob and the waist rail can make the knob to the pressure of waist rail pass through the even transmission of backing plate to each department of waist rail, and the local extrusion by the knob of surface waist rail destroys.

Optionally, one end of the screw rod, which is far away from the auger bit, is provided with a limiting block.

Through adopting above-mentioned technical scheme, the stopper that the auger bit one end set up was kept away from to the screw rod has played limiting displacement to the rotary motion of knob, can avoid the knob excessively to rotate and break away from screw-thread fit on the screw rod.

Optionally, one side of the screw rod close to the auger bit is provided with a helical blade; the outer diameter of the helical blade is not greater than the outer diameter of the helical drill.

Through adopting above-mentioned technical scheme, helical blade structure on the screw rod can be used for the concrete that the drilling was pour to auger bit's direction through the rotation and impel, reduces the cavity in the drilling, makes the concrete structure in the drilling more closely knit for the stock is whole more be difficult to and foundation ditch wall break away from the connection, has improved the pulling force that the stock can bear.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the reinforced concrete structure consisting of the cast-in-place piles, the crown beams and the waist beams which are uniformly arranged along the length direction plays a good supporting effect on the foundation pit wall, the basic function of the foundation pit supporting structure is realized, the anchor rod structures of which the two ends are respectively fixedly connected with the waist beams and the foundation pit wall improve the structural strength and the load bearing capacity of the waist beams, the supporting plates fixedly arranged between the cast-in-place piles play a supporting and protecting role on the foundation pit wall part which is lack of support between the cast-in-place piles, the supporting effect of the slope protection piles on the foundation pit wall is ensured under the condition of improving the pile spacing, the possibility of collapse of the foundation pit wall is reduced, and the safety of foundation pit operation is improved;

2. the arc plate plays a role in fixing the supporting plate structure on the surface of the cast-in-place pile, the baffle plate attached to the foundation pit wall plays a role in supporting and protecting the foundation pit wall, and the bolt holes formed in the arc plate in advance can facilitate relevant operators to fix the supporting plate on the surface of the cast-in-place pile;

3. helical blade structure on the screw rod in this application can be used for the concrete that drilling was pour to auger bit's direction through the rotation and impel, reduces the cavity in the drilling, makes the concrete structure in the drilling more closely knit for the stock is whole more be difficult to with foundation ditch wall disconnection, has improved the pulling force that the stock can bear.

Drawings

Fig. 1 is a schematic structural diagram of a foundation pit slope protection pile structure disclosed in an embodiment of the present application.

Fig. 2 is a schematic structural view of the anchor rod in the embodiment of the present application.

FIG. 3 is a schematic structural diagram of a support shield in an embodiment of the present application.

Description of reference numerals: 1. filling a pile; 2. a crown beam; 3. a wale; 4. an anchor rod; 41. a helical drill bit; 42. a screw; 43. a knob; 44. a backing plate; 421. a limiting block; 422. a helical blade; 5. supporting a guard plate; 51. a baffle plate; 52. an arc-shaped plate; 521. a bolt guide cylinder; 522. and (7) lifting lugs.

Detailed Description

The present application is described in further detail below with reference to figures 1-3.

A slope protection pile is a composite structure used for foundation pit wall support. The most common slope protection pile of the reinforced concrete cast-in-place pile structure is commonly used for supporting the edge of a deep foundation pit due to strong bearing capacity. However, when the cast-in-place pile is constructed, if the pile spacing is set to be small, hole collapse is easy to occur in adjacent pile holes in the cast-in-place pile construction process, and construction is not convenient to be carried out efficiently; if the pile spacing is set to be larger, the foundation pit wall between the cast-in-place piles is easy to collapse due to incomplete support. In order to ensure efficient construction, the supporting effect of the slope protection piles on the foundation pit wall is ensured under the condition of improving the pile spacing, the possibility of collapse of the foundation pit wall is reduced, and the safety of foundation pit operation is improved.

The embodiment of the application discloses foundation ditch slope protection pilework. Referring to fig. 1, the foundation pit slope protection pile structure includes a cast-in-place pile 1, a crown beam 2, a wale 3, an anchor rod 4, and a support plate 5. The cast-in-place piles 1 are evenly arranged along the length direction of a foundation pit, the top beams 2 are arranged at one ends, far away from the ground, of the cast-in-place piles 1, all the cast-in-place piles 1 are connected into a whole, the waist beams 3 are arranged on one sides of the cast-in-place piles 1, and the waist beams 3 are evenly arranged along the length direction of the cast-in-place piles 1. The two ends of the anchor rod 4 are respectively fixedly connected with the waist beam 3 and the foundation pit wall. The supporting and protecting plate 5 is fixedly connected with the cast-in-place piles 1 and is abutted against the foundation pit wall between the cast-in-place piles 1.

Referring to fig. 1, a cast-in-place pile 1 may be a circular solid pile of a reinforced concrete structure. The concrete strength rating may be C30. The main reinforcement of the cast-in-place pile 1 is connected by lap welding, and the number of the same cross section of the joint is not more than 50%. A plurality of bored concrete piles 1 are arranged along the direction perpendicular to the ground, and arranged along the length direction of the foundation pit. The distance between the cast-in-place piles 1 is equal.

Referring to fig. 1, the crown beam 2 may be a square beam of a reinforced concrete structure having a rectangular cross section. The width of the crown beam 2 is not less than the diameter of the cast-in-place pile 1. The crown beam 2 is arranged at the top of the cast-in-place pile 1 in a pouring and integral forming mode. The crown beam 2 concrete strength rating may be C30.

Referring to fig. 1, the wale 3 may be a square beam of a reinforced concrete structure having a rectangular cross section. The waist rail 3 is arranged on one side of the cast-in-place pile 1 and is arranged on the cast-in-place pile 1 in a pile breaking, reinforcing steel bar lapping and formwork erecting pouring mode. Wales 3 are uniformly arranged with respect to the length direction of the cast-in-place pile 1. The wale 3 concrete strength grade may be C30.

Referring to fig. 1 and 2, the anchor rod 4 includes a helical drill 41, a screw 42, a knob 43, and a backing plate 44. The auger bit 41 may be a conical bit made of concrete. The screw 42 may be a solid metal round rod, one end of the screw 42 is fixedly connected with the auger bit 41, and the other end of the screw 42 is provided with a threaded section. The screw 42 has a stop block 421 at the end where the thread section is provided. The side of the threaded rod close to the auger bit 41 is fixedly provided with a helical blade 422 by welding. The threaded section of the screw rod 42 is sleeved with a knob 43, and the knob 43 is in threaded connection with the screw rod 42. The screw rod 42 is arranged on the waist rail 3 in a penetrating way, a gasket is arranged between the knob 43 and the waist rail 3, the gasket can be a round metal sheet, and the gasket is sleeved on the screw rod 42 and attached to the outer surface of the waist rail 3.

Referring to fig. 1 and 3, the backup plate 5 includes a baffle plate 51 and an arc plate 52. The baffle 51 may be a rectangular solid metal plate. Baffle 51 abuts the foundation pit wall between two adjacent cast-in-place piles 1. The baffle plate 51 is fixedly connected with another arc plate 52 respectively through welding with two side edges vertical to the ground. The inner diameter of the arc-shaped plate 52 is equal to the outer diameter of the cast-in-place pile 1, and the arc-shaped plate 52 is attached to the outer surface of the cast-in-place pile 1. Bolt holes are formed at the corners of the arc-shaped plate 52. The bolt guide cylinder 521 is fixedly mounted at the position of the arc plate 52 where the bolt hole is opened along the direction of the axis of the bolt hole in a welding manner. The bolt guide 521 may be a hollow metal cylinder with a threaded hole. A pair of lifting lugs 522 are fixedly mounted on the arc-shaped plate 52 in a welding manner. The lifting lug 522 is symmetrical about the centerline of the baffle 51.

The implementation principle of a foundation ditch slope protection pile structure of this application embodiment does: the operator concerned first starts the construction of the cast-in-place pile 1 along the edge of the foundation pit to be excavated, according to the construction design. And (3) after the hardness of the cast-in-place pile 1 meets the use requirement, starting foundation pit excavation, constructing the waist beam 3 layer by layer along with the excavation of the foundation pit, finally punching a hole on the waist beam 3, fixing the anchor rod 4 on the wall of the foundation pit, and then installing the support and protection plate 5 in place.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a foundation ditch slope protection stake structure which characterized in that: the foundation pit supporting structure comprises a plurality of filling piles (1) uniformly and vertically arranged on the ground along the length direction of a foundation pit, a crown beam (2) horizontally arranged at one end, far away from the ground, of each filling pile (1), a plurality of waist beams (3) uniformly arranged along the length direction of each filling pile (1), a plurality of anchor rods (4) uniformly arranged on the waist beams (3) in a penetrating mode along the length direction, and a supporting plate (5) arranged between every two adjacent filling piles (1); one end of the anchor rod (4) far away from the waist beam (3) is fixedly connected with the foundation pit wall; and the supporting and protecting plate (5) is abutted against the foundation pit wall.

2. A foundation pit slope protection pile structure according to claim 1, characterized in that: the supporting and protecting plate (5) comprises a baffle (51) vertically abutted against the foundation pit wall and arc-shaped plates (52) arranged on two sides of the baffle (51); the inner diameter of the arc-shaped plate (52) is equal to the outer diameter of the cast-in-place pile (1), and the arc-shaped plate is fixedly attached to the outer surface of the cast-in-place pile (1); the arc-shaped plate (52) is provided with a plurality of bolt holes.

3. A foundation pit slope protection pile structure according to claim 2, characterized in that: and a bolt guide cylinder (521) is arranged at the position, which is far away from the plane of one side of the cast-in-place pile (1) of the arc-shaped plate (52) and is provided with the bolt hole, along the axis direction of the bolt hole.

4. A foundation pit slope protection pile structure according to claim 2, characterized in that: lifting lugs (522) are arranged on the plane of one side, away from the cast-in-place pile (1), of the arc-shaped plate (52).

5. A foundation pit slope protection pile structure according to claim 1, characterized in that: the anchor rod (4) comprises a spiral drill bit (41) fixed in the wall of the foundation pit, a screw rod (42) with one end fixedly connected with the spiral drill bit (41) and a knob (43) sleeved on the screw rod (42); the screw rod (42) penetrates through the waist beam (3), and the knob (43) is in threaded fit with the screw rod (42) and is abutted against the waist beam (3).

6. A foundation pit slope protection stake structure of claim 5, characterized in that: a backing plate (44) is arranged between the knob (43) and the waist beam (3); the width of the backing plate (44) is equal to the length of the wale (3).

7. A foundation pit slope protection stake structure of claim 5, characterized in that: and a limiting block (421) is arranged at one end of the screw rod (42) far away from the auger bit (41).

8. A foundation pit slope protection stake structure of claim 5, characterized in that: a helical blade (422) is arranged on one side of the screw rod (42) close to the helical drill bit (41); the outer diameter of the helical blade (422) is not greater than the outer diameter of the auger bit (41).