A device for preventing concrete overflow on the outside of a steel pipe at the joint between a column pile and a cast-in-place pile
By using wire mesh to separate the pouring area between the reinforcing cage and the column piles, the problem of concrete waste in foundation pit support engineering was solved, and concrete spillage was effectively prevented and construction efficiency was improved.
Patent Information
- Application Number
- CN202522087405.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-26
- Publication Date
- 2026-08-25
- Estimated Expiration
- 2035-09-26
AI Technical Summary
In foundation pit support engineering, concrete waste is prone to occur at the connection between steel pipe column piles and concrete piles. Existing prevention measures are complex and ineffective, leading to extended construction time.
Steel wire mesh is used to connect the reinforcing cage and the column piles together, separating the pouring area and preventing concrete from overflowing and being wasted by fixing it with steel wire mesh.
It effectively prevents concrete from overflowing from the gap between the steel cage and the column pile, reducing waste, simplifying the operation process, and shortening the construction time.
Smart Images
Figure CN224678669U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of foundation pit technology, specifically a device for preventing concrete from overflowing onto the outside of the steel pipe at the connection between the column pile and the cast-in-place pile. Background Technology
[0002] Currently, in foundation pit support engineering, the vertical support hollow steel pipe column piles of the internal support beams are usually supported by engineering piles (cast-in-place piles) as the bearing foundation. During the construction of the engineering piles, the steel pipe column piles are welded to the reinforcing cage of the engineering piles and hoisted into the pile hole together. The distance from the bottom of the column pile into the reinforcing cage is generally about 3-5m according to the design requirements. Then, concrete is poured. The concrete is first poured to the top of the reinforcing cage (first stage pouring), and then the internal cavity of the hollow steel pipe column pile is filled (second stage pouring) to ensure the strength of the column pile body. After the concrete pouring of the cast-in-place pile is completed, the guide pipe needs to be raised to pour concrete into the cavity inside the hollow steel pipe pile. At this time, the area formed by the inside of the pile hole, the top of the cast-in-place pile reinforcement cage, and the outside of the hollow steel pipe column pile (the area outside the pile) does not need to be poured with concrete. Since the diameter of the steel pipe column pile is smaller than the diameter of the cast-in-place pile and reinforcement cage that serve as the bearing foundation, during the second stage of pouring, the concrete will enter the area outside the pile from the joint between the hollow steel pipe column pile and the reinforcement cage (the outside of the hollow steel pipe column pile) as the pressure increases, resulting in a waste of concrete.
[0003] In existing foundation pit support projects, the connection between steel pipe column piles and concrete piles uses a densely welded steel reinforcement cage with steel plates or sheet metal as a "cap" to prevent concrete from overflowing onto the outside of the steel column and wasting concrete. However, the dimensions of this type of cap are difficult to control: if the cap is too small, concrete will overflow around the perimeter of the cap and fail to serve its purpose; if the cap is too large, it will easily scrape the borehole wall during cage lowering, making cage lowering difficult. There are also many welding points for fixing the reinforcement: to ensure the firmness of the reinforcement frame in a relatively dense spacing of reinforcement bars, the horizontal and vertical reinforcement bars are fixed by welding, resulting in many welding points, complicated procedures, and extended construction time. Utility Model Content
[0004] To solve the above-mentioned technical problems, this utility model provides a device for preventing concrete from overflowing onto the outside of the steel pipe at the connection between the column pile and the cast-in-place pile. This structure connects the reinforcing cage and the column pile together with a wire mesh. During pouring, the first pouring area is poured first, followed by the second pouring area. When pouring the second pouring area, as the pressure increases, the concrete overflows from the gap between the reinforcing cage and the column pile, resulting in concrete appearing in both the first and second pouring areas, causing concrete waste. Therefore, the wire mesh can prevent the poured concrete from overflowing from the gap between the reinforcing cage and the column pile, avoiding concrete waste.
[0005] The technical solution of this utility model is:
[0006] A device for preventing concrete overflow from the outside of a steel pipe at the connection between a column pile and a cast-in-place pile includes a reinforcing cage and a column pile. Both the reinforcing cage and the column pile are located inside the pile hole, dividing the pile hole into two areas: a first pouring area and a second pouring area. The area enclosed by the reinforcing cage is the first pouring area, which forms the cast-in-place pile. The inside of the column pile is the second pouring area. The device also includes a wire mesh, one end of which is fixedly connected to the outer peripheral wall of the column pile, and the other end is fixedly connected to the outer peripheral wall of the reinforcing cage. The wire mesh is used to prevent concrete from overflowing outside the first pouring area and the second pouring area.
[0007] Preferably, the top of the wire mesh is arranged around the outer perimeter of the column pile, and the bottom is arranged around the outer perimeter of the reinforcing cage, with the wire mesh arranged in at least two loops.
[0008] Preferably, the device for preventing concrete overflow from the outside of the steel pipe at the joint between the column pile and the cast-in-place pile also includes a fixing ring, one end of the wire mesh being located between the fixing ring and the column pile, and the fixing ring being welded to the outer peripheral wall of the column pile.
[0009] Preferably, the retaining ring is a bent steel bar.
[0010] Preferably, the reinforcing cage includes multiple annular horizontal bars and multiple vertical bars, with the vertical bars arranged around the horizontal bars and the horizontal bars arranged side by side. The device for preventing concrete from overflowing onto the outside of the steel pipe at the connection between the column pile and the cast-in-place pile also includes multiple connecting rings. The connecting rings pass through the mesh of the wire mesh and encircle a single vertical bar. The multiple connecting rings are used to fix one end of the wire mesh to the reinforcing cage.
[0011] Preferably, the connecting ring is made of steel wire.
[0012] Preferably, the reinforcing cage further includes a support member, one end of which is fixedly connected to the outer peripheral wall of the vertical bar, and the other end is fixedly connected to the outer peripheral wall of the column pile.
[0013] Preferably, the support includes a support rod and an L-shaped fixing rod. The vertical end of the fixing rod is fixedly connected to the outer peripheral wall of the vertical reinforcement. One end of the support rod is connected to the horizontal end of the fixing rod, and the other end is fixedly connected to the column pile.
[0014] Preferably, the support rod and the fixing rod are integrally molded.
[0015] One of the above-described technical solutions of this utility model has at least one of the following advantages or beneficial effects:
[0016] 1. This utility model connects the reinforcing cage and the column pile together using wire mesh. During pouring, the first pouring area is poured first, followed by the second pouring area. When pouring the second pouring area, as the pressure increases, the concrete overflows from the gap between the reinforcing cage and the column pile, resulting in concrete appearing in both the first and second pouring areas, causing concrete waste. Therefore, the wire mesh can prevent the poured concrete from overflowing from the gap between the reinforcing cage and the column pile, thus avoiding concrete waste.
[0017] 2. Furthermore, the use of wire mesh facilitates the operation of workers, reduces operational procedures, and shortens construction time. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present invention;
[0019] Figure 2 for Figure 1 A magnified view of a portion of the image.
[0020] The reference numerals for each of the attached figures are as follows:
[0021] 1. Reinforcing cage; 11. Horizontal reinforcement; 12. Vertical reinforcement; 13. Supporting components; 131. Support rod; 132. Fixing rod;
[0022] 2. Erected piles;
[0023] 3. First pouring area;
[0024] 4. Second pouring area;
[0025] 5. Wire mesh;
[0026] 6. Retaining ring;
[0027] 7. Connecting ring. Detailed Implementation
[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0029] Example 1
[0030] Please see Figure 1-2A device for preventing concrete overflow from the outside of a steel pipe at the connection between a column pile and a cast-in-place pile includes a reinforcing cage 1 and a column pile 2. Both the reinforcing cage 1 and the column pile 2 are located inside the pile hole, dividing the pile hole into two areas: a first pouring area 3 and a second pouring area 4. The area enclosed by the reinforcing cage 1 is the first pouring area 3, which forms the cast-in-place pile. The inside of the column pile 2 is the second pouring area 4. The device also includes a wire mesh 5, one end of which is fixedly connected to the outer peripheral wall of the column pile 2, and the other end is fixedly connected to the outer peripheral wall of the reinforcing cage 1. The wire mesh 5 is used to prevent concrete from overflowing outside the first pouring area 3 and the second pouring area 4.
[0031] It should be noted that the steel cage 1 mentioned in this embodiment is a steel cage 1 well known to those skilled in the art, and the column pile 2 is a hollow column pile.
[0032] In practical applications, workers connect the reinforcing cage 1 and the column pile 2 together using wire mesh 5. The specific connection method is as follows: A foundation pile hole is dug in the ground, and a steel casing is embedded inside the hole. First, the reinforcing cage 1 is hoisted into the steel casing, with its top protruding above the ground. A thick steel bar passes through the steel casing and into the reinforcing cage 1 to secure it. Then, the column pile 2 is hoisted and placed inside the reinforcing cage 1, specifically, with the bottom of the column pile 2 inside the reinforcing cage 1, meaning the column pile 2 extends into the cage 1. The depth of insertion is determined by the workers based on the actual situation. At this point, the reinforcing cage 1 and the column pile 2 are connected together using wire mesh 5. After removing the thick steel bar, the reinforcing cage 1 and the column pile 2 are hoisted back into the foundation pile hole. Concrete pouring can then commence. The concrete is poured into the first pouring area 3, which includes part of the intersection with the second pouring area 4, that is, the overlapping part of the column pile 2 and the reinforcing cage 1. After the first pouring is completed and the concrete solidifies, a cast-in-place pile is formed. Then, a second pouring is carried out, which is poured into the second pouring area 4. During the pouring process, due to the increase in pressure, the concrete will overflow into the first pouring area 3 and the second pouring area 4. However, the wire mesh 5 can prevent the concrete from overflowing into the first pouring area 3 and the second pouring area 4, thus avoiding the waste of concrete. Finally, after the concrete is poured and formed, when the earthwork is excavated from top to bottom, the column pile 2 and the reinforcing cage 1 are still left in the pile hole, so the column pile 2 is in a suspended state. Finally, the column pile 2 only needs to be cut open at the junction of the top of the column pile 2 and the reinforcing cage 1.
[0033] Preferably, the top of the wire mesh 5 is arranged around the outer perimeter of the column pile 2, and the bottom is arranged around the outer perimeter of the reinforcing cage 1, with the wire mesh 5 arranged in at least two circles.
[0034] In this embodiment, the wire mesh 5 is a steel wire mesh because the material of the steel wire mesh 5 is readily available, and the wire loops are wrapped at least twice to increase the mesh density of the steel wire mesh 5. Since concrete is composed of cement, water, sand, and gravel, the steel wire mesh 5 can block larger gravel. When the mesh of the steel wire mesh 5 is blocked by gravel, the surrounding cement slurry will wrap the gravel, thereby preventing concrete from overflowing. The steel wire mesh 5 is a simple and convenient way to prevent over-pouring of concrete.
[0035] Preferably, the device for preventing concrete from overflowing onto the outside of the steel pipe at the joint between the column pile and the cast-in-place pile also includes a fixing ring 6, one end of the wire mesh 5 is located between the fixing ring 6 and the column pile 2, and the fixing ring 6 is welded to the outer peripheral wall of the column pile 2.
[0036] Through the above design, the fixing ring 6 can fix one end of the wire mesh 5 to the column pile 2, improve the fixing effect between the wire mesh 5 and the column pile 2, and make the column pile 2 and the wire mesh 5 more closely attached. This can prevent the wire mesh 5 from falling off the column pile 2 when the concrete impacts the wire mesh 5 under pressure during the second pour.
[0037] Preferably, the fixing ring 6 is a bent steel bar.
[0038] In this embodiment, the fixing ring 6 is a bent steel bar, which gives the fixing ring 6 a certain strength and rigidity, and can further prevent the wire mesh 5 from falling off the column pile 2. Moreover, the material of the steel bar is also easy for workers to obtain.
[0039] Preferably, the reinforcing cage 1 includes multiple annular horizontal bars 11 and multiple vertical bars 12. The multiple vertical bars 12 are arranged around the horizontal bars 11, and the multiple horizontal bars 11 are arranged side by side. The device for preventing concrete from overflowing onto the outside of the steel pipe at the connection between the column pile and the cast-in-place pile also includes multiple connecting rings 7. The connecting rings 7 pass through the mesh of the wire mesh 5 and are arranged to encircle a single vertical bar 12. The multiple connecting rings 7 are used to fix one end of the wire mesh 5 to the reinforcing cage 1.
[0040] In the above design, the horizontal bars 11 and the vertical bars 12 form the whole of the steel cage 1, and the steel wire mesh 5 and the vertical bars 12 are further fixed by the connecting ring 7 passing through the mesh of the steel wire mesh 5, so as to prevent the end of the steel wire mesh 5 connected to the steel cage 1 from falling off.
[0041] Preferably, the connecting ring 7 is a steel wire.
[0042] In this embodiment, the connecting ring 7 is a steel wire. Since steel wire is easy to obtain, and the connecting ring 7 can also be used and operated by staff more flexibly.
[0043] Preferably, the reinforcing cage 1 further includes a support member 13, one end of which is fixedly connected to the outer peripheral wall of the vertical bar 12, and the other end is fixedly connected to the outer peripheral wall of the column pile 2.
[0044] Through the above design, the support member 13 can further fix the position of the steel cage 1 and the column pile 2, and the support member 13 can also realize the positioning of the steel cage 1 and the column pile 2, so that the column pile 2 and the steel cage 1 can be arranged coaxially and improve the stability of the steel cage 1 and the column pile 2. When the workers install the wire mesh 5, the steel cage 1 and the column pile 2 can be better fixed, thus facilitating the operation of the workers.
[0045] Preferably, the support member 13 includes a support rod 131 and an L-shaped fixing rod 132. The vertical end of the fixing rod 132 is fixedly connected to the outer peripheral wall of the vertical rib 12. One end of the support rod 131 is connected to the horizontal end of the fixing rod 132, and the other end is fixedly connected to the column pile 2.
[0046] In the above design, the fixing rod 132 and the support rod 131 can better fix the reinforcing cage 1 and the column pile 2. Specifically, the end of the fixing rod 132 that contacts the vertical bar 12 is welded, the end of the support rod 131 that connects to the fixing rod 132 is welded, and the support rod 131 that connects to the column pile 2 is also welded. This better achieves the functions of positioning and fixing. It should be noted that, referring to... Figure 2 The horizontal part of the fixing rod 132 is designed to be inclined, but it can also be designed to be horizontal. Specifically, the inclined direction is that the upward inclined end is fixedly connected to the vertical part of the fixing rod 132, and the downward inclined end is fixedly connected to the support rod 131.
[0047] Preferably, the support rod 131 and the fixing rod 132 are integrally molded.
[0048] In this embodiment, the support rod 131 and the fixing rod 132 are integrally molded, which can improve the strength and rigidity of the support rod 131 and the fixing rod 132, better fix the column pile 2 and realize the positioning function of the coaxial arrangement of the column pile 2 and the steel cage 1.
[0049] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.
Claims
1. A device for preventing concrete overflow from the outside of a steel pipe at the joint between a column pile and a cast-in-place pile, comprising a reinforcing cage and a column pile, wherein both the reinforcing cage and the column pile are located within a pile hole, dividing the pile hole into two areas: a first pouring area and a second pouring area. The area enclosed by the reinforcing cage is the first pouring area, which forms the cast-in-place pile. The interior of the column pile is the second pouring area. The device is characterized in that... It also includes a wire mesh, one end of which is fixedly connected to the outer peripheral wall of the column pile, and the other end is fixedly connected to the outer peripheral wall of the reinforcing cage. The wire mesh is used to prevent concrete from overflowing outside the first pouring area and outside the second pouring area.
2. The device for preventing concrete overflow from the outside of the steel pipe at the joint between the column pile and the cast-in-place pile as described in claim 1, characterized in that, The top of the wire mesh is arranged around the outer perimeter of the column pile, and the bottom is arranged around the outer perimeter of the reinforcing cage, with the wire mesh arranged in at least two loops.
3. The device for preventing concrete overflow from the outside of the steel pipe at the joint between the column pile and the cast-in-place pile as described in claim 1, characterized in that, The device for preventing concrete overflow from the outside of the steel pipe at the connection between the column pile and the cast-in-place pile also includes a fixing ring. One end of the wire mesh is located between the fixing ring and the column pile, and the fixing ring is welded to the outer peripheral wall of the column pile.
4. The device for preventing concrete overflow from the outside of the steel pipe at the joint between the column pile and the cast-in-place pile as described in claim 3, characterized in that, The fixing ring is a bent steel bar.
5. The device for preventing concrete overflow from the outside of the steel pipe at the joint between the column pile and the cast-in-place pile according to claim 1, characterized in that, The reinforcing cage includes multiple annular horizontal bars and multiple vertical bars. The multiple vertical bars are arranged around the horizontal bars, and the multiple horizontal bars are arranged side by side. The device for preventing concrete overflow from the outside of the steel pipe at the connection between the column pile and the cast-in-place pile also includes multiple connecting rings. The connecting rings pass through the mesh of the wire mesh and encircle a single vertical bar. The multiple connecting rings are used to fix one end of the wire mesh to the reinforcing cage.
6. The device for preventing concrete overflow from the outside of the steel pipe at the joint between the column pile and the cast-in-place pile according to claim 5, characterized in that, The connecting ring is made of steel wire.
7. The device for preventing concrete overflow from the outside of the steel pipe at the joint between the column pile and the cast-in-place pile as described in claim 5, characterized in that, The steel cage also includes a support member, one end of which is fixedly connected to the outer peripheral wall of the vertical bar, and the other end is fixedly connected to the outer peripheral wall of the column pile.
8. The device for preventing concrete overflow from the outside of the steel pipe at the joint between the column pile and the cast-in-place pile according to claim 7, characterized in that, The support includes a support rod and an L-shaped fixing rod. The vertical end of the fixing rod is fixedly connected to the outer peripheral wall of the vertical reinforcement. One end of the support rod is connected to the horizontal end of the fixing rod, and the other end is fixedly connected to the column pile.
9. The device for preventing concrete overflow from the outside of the steel pipe at the joint between the column pile and the cast-in-place pile as described in claim 8, characterized in that, The support rod and the fixing rod are designed as a single piece.