阅读说明：本技术 一种预制u型通道复合型抗浮桩及其施工方法 (Prefabricated U-shaped channel composite anti-floating pile and construction method thereof ) 是由 童祖玲 徐庆平 方伟 马娟 邵迎春 陆强 汪惠民 梁治建 张颖 朱胜 于 2021-08-09 设计创作，主要内容包括：本发明涉及一种预制U型通道复合型抗浮桩,包括钢管桩,所述钢管桩为圆柱筒形,插入所述U型通道下方的土中；该钢管桩的下端与桩底相连,其内部设有混凝土制桩身,其上端设有混凝土制桩帽；该桩帽的纵截面为T形,其中部与所述U形通道上的预留孔相适应,使该桩帽能够卡接在所述预留孔内,并使其上部压在所述预留孔的上缘上。本发明可以充分满足U型通道抗浮的需求,保证道路的安全使用和寿命。同时,还可使施工更加方便快捷,提高施工效率,满足市场需求。(The invention relates to a prefabricated U-shaped channel composite anti-floating pile which comprises a steel pipe pile, wherein the steel pipe pile is cylindrical and is inserted into soil below a U-shaped channel; the lower end of the steel pipe pile is connected with the pile bottom, a concrete pile body is arranged in the steel pipe pile, and a concrete pile cap is arranged at the upper end of the steel pipe pile; the vertical section of the pile cap is T-shaped, the middle part of the pile cap is matched with the reserved hole on the U-shaped channel, so that the pile cap can be clamped in the reserved hole, and the upper part of the pile cap is pressed on the upper edge of the reserved hole. The anti-floating U-shaped channel can fully meet the anti-floating requirement of the U-shaped channel, and the safe use and the service life of a road are ensured. Meanwhile, the construction can be more convenient and faster, the construction efficiency is improved, and the market demand is met.)

1. A prefabricated U-shaped channel composite anti-floating pile comprises a steel pipe pile and is characterized in that the steel pipe pile is cylindrical and is inserted into soil below a U-shaped channel; the lower end of the steel pipe pile is connected with the pile bottom, a concrete pile body is arranged in the steel pipe pile, and a concrete pile cap is arranged at the upper end of the steel pipe pile; the vertical section of the pile cap is T-shaped, the middle part of the pile cap is matched with the reserved hole on the U-shaped channel, so that the pile cap can be clamped in the reserved hole, and the upper part of the pile cap is pressed on the upper edge of the reserved hole.

2. The prefabricated U-shaped channel composite anti-floating pile as claimed in claim 1, wherein a conical head is arranged at the lower end of the steel pipe pile; the head part is formed by splicing a plurality of arc sector steel sheets; the upper end of the steel sheet is connected with the steel pipe pile through a connecting sheet, so that the head can assist the steel pipe pile to drill into the soil and open outwards under grouting pressure.

3. The prefabricated U-shaped channel composite anti-floating pile as claimed in claim 1, wherein a grouting pipe is arranged in the steel pipe pile; the grouting pipe is arranged along the axial direction of the steel pipe pile, and the length of the grouting pipe is equivalent to that of the steel pipe pile, so that cement slurry can be injected through the grouting pipe, and the pile bottom is formed at the bottom of the steel pipe pile.

4. The prefabricated U-shaped channel composite anti-floating pile as claimed in claim 3, wherein the grouting pipe is provided with a plurality of grouting pipes.

5. The prefabricated U-shaped channel composite anti-floating pile as claimed in claim 1, wherein a fixing plate is arranged in the steel pipe pile; the fixing plate is made of steel plates, is arranged along the radial direction of the steel pipe pile and is provided with a positioning hole; the grouting pipe is arranged in the positioning hole in a penetrating mode.

6. The prefabricated U-shaped channel composite anti-floating pile as claimed in claim 5, wherein the fixing plate is disposed at the bottom end of the steel pipe pile.

7. The prefabricated U-shaped channel composite anti-floating pile as claimed in claim 1, wherein a reinforcement cage is arranged in the pile body.

8. The prefabricated U-shaped channel composite anti-floating pile as claimed in claim 1, wherein a steel mesh is arranged in the pile cap.

9. A construction method of a prefabricated U-shaped channel composite type anti-floating pile according to any one of claims 1 to 8, characterized by comprising the following steps:

1) completing the welding of the positioning steel plate in the first section of the steel pipe pile, the positioning construction of a grouting pipe and the manufacturing of the conical head of the steel pipe pile;

2) after the prefabricated U-shaped channel is pushed to be in place, cleaning a preformed hole on a bottom plate, fixing a static pressure pile machine through an M27 claw limb anchor rod pre-embedded on the bottom plate of the U-shaped channel, and driving a steel pipe pile;

3) respectively connecting steel pipe sections of the steel pipe pile and steel pipe sections of the grouting pipe by welding, driving the steel pipe pile to a designed position, removing the static pressure pile machine, and cutting the M27 claw limb anchor rod;

4) manufacturing and lowering a reinforcement cage section by section, and pouring C20 concrete into the steel pipe pile; the reinforcement cage can be bound in advance;

5) when the concrete reaches the setting stage, injecting cement paste through the grouting pipe to form a pile bottom;

6) cutting redundant grouting pipes, straightening reinforcing steel bars of a bottom plate in the reserved hole, constructing a reinforced concrete pile cap, firmly fixing the bottom plate of the U-shaped channel and avoiding upward floating.

Technical Field

The invention relates to a building structure and a construction method thereof, in particular to an anti-floating pile structure and a construction method thereof, and specifically relates to a prefabricated U-shaped channel composite anti-floating pile and a construction method thereof.

Background

At present, an urban traffic network consists of elevated frames, overpasses, rail traffic, underground passages, ground roads and the like, so that the situation that the existing bridges are penetrated under newly-built roads often occurs. Under the condition that the space of the newly-built underpass road is limited by the existing bridge, the construction of the underbridge road is completed by adopting the pushing prefabricated U-shaped channel. However, in high water level areas, the prefabricated U-shaped channel solves the problem of anti-floating. However, the existing anti-floating device cannot fully meet the construction requirement of the U-shaped channel, so that improvement is urgently needed so as to better meet the market requirement.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a prefabricated U-shaped channel composite anti-floating pile and a construction method thereof, which can effectively ensure the use safety and the service life of a road, are simple and quick in construction operation and can fully meet the market demand.

The technical scheme of the invention is as follows:

a prefabricated U-shaped channel composite anti-floating pile comprises a steel pipe pile, wherein the steel pipe pile is cylindrical and is inserted into soil below a U-shaped channel; the lower end of the steel pipe pile is connected with the pile bottom, a concrete pile body is arranged in the steel pipe pile, and a concrete pile cap is arranged at the upper end of the steel pipe pile; the vertical section of the pile cap is T-shaped, the middle part of the pile cap is matched with the reserved hole on the U-shaped channel, so that the pile cap can be clamped in the reserved hole, and the upper part of the pile cap is pressed on the upper edge of the reserved hole.

Further, the lower end of the steel pipe pile is provided with a conical head; the head part is formed by splicing a plurality of arc sector steel sheets; the upper end of the steel sheet is connected with the steel pipe pile through a connecting sheet, so that the head can assist the steel pipe pile to drill into the soil and open outwards under grouting pressure.

Furthermore, a grouting pipe is arranged in the steel pipe pile; the grouting pipe is arranged along the axial direction of the steel pipe pile, and the length of the grouting pipe is equivalent to that of the steel pipe pile, so that cement slurry can be injected through the grouting pipe, and the pile bottom is formed at the bottom of the steel pipe pile.

Furthermore, the grouting pipes are multiple.

Further, a fixing plate is arranged in the steel pipe pile; the fixing plate is made of steel plates, is arranged along the radial direction of the steel pipe pile and is provided with a positioning hole; the grouting pipe is arranged in the positioning hole in a penetrating mode.

Further, the fixing plate is arranged at the bottom end of the steel pipe pile.

Furthermore, a steel reinforcement cage is arranged in the pile body.

Furthermore, a steel bar net piece is arranged in the pile cap.

A construction method of a prefabricated U-shaped channel composite anti-floating pile comprises the following steps:

1) completing the welding of the positioning steel plate in the first section of the steel pipe pile, the positioning construction of a grouting pipe and the manufacturing of the conical head of the steel pipe pile;

2) after the prefabricated U-shaped channel is pushed to be in place, cleaning a preformed hole on a bottom plate, fixing a static pressure pile machine through an M27 claw limb anchor rod pre-embedded on the bottom plate of the U-shaped channel, and driving a steel pipe pile;

3) respectively connecting steel pipe sections of the steel pipe pile and steel pipe sections of the grouting pipe by welding, driving the steel pipe pile to a designed position, removing the static pressure pile machine, and cutting the M27 claw limb anchor rod;

4) manufacturing and lowering a reinforcement cage section by section, and pouring C20 concrete into the steel pipe pile; the reinforcement cage can be bound in advance;

5) when the concrete reaches the setting stage, injecting cement paste through the grouting pipe to form a pile bottom;

6) cutting redundant grouting pipes, straightening reinforcing steel bars of a bottom plate in the reserved hole, constructing a reinforced concrete pile cap, firmly fixing the bottom plate of the U-shaped channel and avoiding upward floating.

The invention has the beneficial effects that:

the anti-floating U-shaped channel is reasonable in design, simple in structure and convenient to use, can fully meet the anti-floating requirement of the U-shaped channel, and ensures the safe use and the service life of a road. Meanwhile, the construction can be more convenient and faster, the construction efficiency is improved, and the market demand is met.

Drawings

Fig. 1 is a schematic structural view of the present invention.

Fig. 2 is a schematic cross-sectional view of a reinforcement cage.

Fig. 3 is a schematic view of a rebar mesh.

Wherein, 1-pile bottom; 2-steel sheet; 3, connecting a sheet; 4-grouting pipe; 5, fixing a plate; 6-steel pipe pile; 7-pile body; 8-a reinforcement cage; 9-U-shaped channel; 10-reinforcing mesh sheet; 11-pile cap.

Detailed Description

The invention is further described below with reference to the figures and examples.

As shown in fig. 1-3.

A prefabricated U-shaped channel composite anti-floating pile comprises a steel pipe pile 6.

The steel pipe pile 6 is cylindrical and can be inserted into soil below the U-shaped channel 9 under the driving of a pile driver. The lower end of the steel pipe pile 6 is provided with a conical head. The head comprises a plurality of arc fan-shaped steel sheets 2, the upper end of each steel sheet 2 is connected with the steel pipe pile 6 through a connecting sheet 3, so that the steel sheets can be spliced into a cone shape to assist the steel pipe pile 6 to drill into the soil. In this example, the steel pipe pile is formed by welding a plurality of ϕ 325 × 8mm steel pipe sections each having a length of 6 m. The four steel sheets 2 are identical in shape and size and can be spliced into a conical head with the length of about 1 m. The connecting piece 3 is made of sheet iron, the thickness of the sheet iron is about 1mm, and the size of the sheet iron is about 2cmx4 cm. The connecting piece 3 is arranged in the center of the upper end of the steel sheet 2 and is connected with the lower end of the steel pipe pile 6 through welding, so that the connecting piece has certain strength to ensure the connection of the steel sheets, and can also be bent to enable the steel sheets to be outwards opened.

And a grouting pipe 4 is arranged in the steel pipe pile 6. The grout pipe 4 may be formed by welding a plurality of ϕ 48 × 3mm steel pipe segments of 6 m length, and is installed along the axial direction of the steel pipe pile 6, and has a length equivalent to that of the steel pipe pile 6, and the lower end portion thereof slightly extends out of the lower end of the steel pipe pile 6, so that grout is injected below the steel pipe pile 6 through the grout pipe 4 to form the pile bottom 1. Preferably, the grouting pipe 4 is provided with a plurality of pipes so as to improve grouting efficiency. Meanwhile, a fixing plate 5 is arranged in the steel pipe pile 6. The fixing plate 5 is made of a steel plate, is arranged along the radial direction of the steel pipe pile 6, and is provided with a positioning hole. The grouting pipe 4 is inserted into the positioning hole, so that the grouting pipe 4 is stable and limited. Preferably, the fixing plate 5 is disposed at the bottom end of the steel pipe pile 6, so as to improve the positioning effect. During grouting construction, the conical head can be outwards spread under grouting pressure, so that cement paste can be fully filled around the lower end of the steel pipe pile to form a stable pile bottom, and the conical head is firmly connected with the steel pipe pile.

The steel pipe pile 6 is internally provided with a reinforcement cage 8, concrete is injected into the steel pipe pile 6 to form a pile body 7, and the composite anti-floating pile and the steel pipe pile 6 jointly form a composite anti-floating pile, so that the rigidity and the strength of the pile body can be increased, and the anti-floating force of the composite anti-floating pile can be improved.

And a pile cap 11 is arranged at the upper end of the steel pipe pile 6. The pile cap 11 is made of micro-expansion concrete, the longitudinal section of the pile cap is T-shaped, the middle part of the pile cap is matched with a reserved hole on the U-shaped channel 9, so that the pile cap 11 can be clamped in the reserved hole, and the upper part of the pile cap is pressed on the upper edge of the reserved hole. Preferably, a steel mesh 10 is arranged in the pile cap 11. The reinforcing mesh 10 is connected with the reinforcing cage 8 to ensure that the pile cap 11 is firmly connected with the pile body 7. The bottom plate of the U-shaped channel 9 is then pressed firmly, preventing it from floating upwards.

The invention discloses a construction method of a prefabricated U-shaped channel composite anti-floating pile, which comprises the following steps:

1) completing the welding of the positioning steel plate in the first section of the steel pipe pile, the positioning construction of a grouting pipe and the manufacturing of the conical head of the steel pipe pile;

2) after the prefabricated U-shaped channel is pushed to be in place, cleaning a preformed hole on a bottom plate, fixing a static pressure pile machine through an M27 claw limb anchor rod pre-embedded on the bottom plate of the U-shaped channel, and driving a steel pipe pile;

3) respectively connecting steel pipe sections of the steel pipe pile and steel pipe sections of the grouting pipe by welding, driving the steel pipe pile to a designed position, removing the static pressure pile machine, and cutting the M27 claw limb anchor rod;

4) manufacturing and lowering a reinforcement cage section by section, and pouring C20 concrete into the steel pipe pile; the reinforcement cage can be bound in advance;

5) when the concrete reaches the setting stage, injecting cement paste through the grouting pipe, and fixing to form a pile bottom;

6) cutting redundant grouting pipes, straightening reinforcing steel bars of a bottom plate in the reserved hole, constructing a reinforced concrete pile cap, firmly fixing the bottom plate of the U-shaped channel and avoiding upward floating.

According to the invention, the composite pile with higher strength is formed by pouring the concrete pile body in the steel pipe pile, the pile bottom is formed by pouring slurry at the bottom of the composite pile, the consolidation force is enhanced, the bottom plate of the U-shaped channel is effectively pressed, and the use safety and the service life of the road are ensured. Meanwhile, the construction can be more convenient and faster, the construction efficiency is improved, the construction requirement of a newly-built road for penetrating through the urban bridge section is met, and the method is worthy of popularization

The parts not involved in the present invention are the same as or can be implemented using the prior art.