Steel pipe pile assembly, foundation pit support structure and construction method thereof
阅读说明：本技术 钢管桩组件、基坑围护结构及其施工方法 (Steel pipe pile assembly, foundation pit support structure and construction method thereof ) 是由 胡哲彬 唐建成 严佳梁 张云妹 陈方 刘天石 汤天鸣 吴杰 郑晏华 于 2019-09-24 设计创作，主要内容包括：本发明提供了一种钢管桩组件、基坑围护结构,钢管桩组件包括：至少两根并列设置的钢管桩以及与钢管桩配套设置的锁口对；其中,每个锁口对中的两个锁口相对与其配套的钢管桩呈轴对称分布设置；相邻两根钢管桩上的锁口互相咬合密封,以使两根钢管桩成为一体的同时密封两根钢管桩之间的缝隙。通过采用如上所述的钢管桩组件进行基坑围护,构成集挡土与抗渗性能于一体的整体式钢管桩围护体系,基于钢管桩组件的高强度、高刚度、高稳定性的良好性能；在沉桩过程中钢管桩薄壁打入,挤土效应不明显,且施工工序简单施工效率高；钢管桩之间可通过锁口搭接施工,无需在坑外布置止水帷幕,降低了施工噪音和建筑垃圾的产生,符合绿色施工的理念。(The invention provides a steel pipe pile assembly and a foundation pit support structure, wherein the steel pipe pile assembly comprises: at least two steel pipe piles arranged in parallel and a locking notch pair matched with the steel pipe piles; wherein, two locking notches in each locking notch pair are arranged in axial symmetry relative to the steel pipe pile matched with the locking notches; the locking notches on two adjacent steel pipe piles are mutually occluded and sealed, so that the two steel pipe piles are integrated and the gap between the two steel pipe piles is sealed. The steel pipe pile assembly is adopted for foundation pit enclosure, so that an integral steel pipe pile enclosure system integrating soil retaining and anti-permeability performance is formed, and the steel pipe pile assembly is based on good performances of high strength, high rigidity and high stability; in the pile sinking process, the thin wall of the steel pipe pile is driven, the soil squeezing effect is not obvious, and the construction process is simple and the construction efficiency is high; the construction of accessible fore shaft overlap joint between the steel-pipe pile need not to arrange the stagnant water curtain outside the hole, has reduced the production of construction noise and building rubbish, accords with the theory of green construction.)
1. A steel pipe pile assembly, comprising: at least two steel pipe piles arranged in parallel and a locking notch pair matched with the steel pipe piles; wherein, two locking notches in each locking notch pair are arranged in axial symmetry relative to the steel pipe pile matched with the locking notches; the locking notches on two adjacent steel pipe piles are mutually occluded and sealed, so that the two steel pipe piles are integrated and the gap between the two steel pipe piles is sealed.
2. The steel pipe pile assembly according to claim 1, wherein the locking notches of the locking notch pair are each a hot rolled sleeve type locking notch.
3. The steel pipe pile assembly according to claim 1, wherein the locking notches of two adjacent steel pipe piles are sealed in an interlocking seal mode by: and sealing the overlapped part of the mutually occluded locking notches by adopting a full-length welding line.
4. The steel pipe pile assembly according to claim 1, wherein the steel pipe pile is made of Q345B, and the steel pipe pile has a wall thickness of 12mm to 16 mm.
5. The steel pipe pile assembly according to claim 4, wherein the steel pipe pile has an outer diameter of 700mm to 800 mm.
6. The steel pipe pile assembly according to claim 1, comprising: the steel pipe piles are arranged in parallel, and a reinforcing ring plate is arranged at the top of the steel pipe pile in the middle.
7. The steel pipe pile assembly according to claim 6, wherein the reinforcement ring plate has a thickness of 14 mm.
8. The steel pipe pile assembly according to claim 6, further comprising lifting lugs provided at both sides of the reinforcing ring plate.
9. A foundation pit enclosure structure, characterized by comprising a plurality of steel pipe pile assemblies according to any one of claims 1-8.
10. A construction method of a foundation pit support structure is characterized by comprising the following steps:
transporting the prefabricated steel pipe pile assembly of any one of claims 1-8 to a construction site;
the following steps are carried out on each side of the foundation pit:
when the steel pipe pile assembly is lifted to be in place, arranging a guide frame at a designed pile position to control the pile sinking verticality of the steel pipe pile assembly;
and performing pile sinking construction on the steel pipe pile assembly.
Technical Field
The invention relates to the technical field of enclosure system construction, in particular to a steel pipe pile assembly, a foundation pit enclosure structure and a construction method of the foundation pit enclosure structure.
Background
At present, the deep foundation pit support structure design mostly adopts a traditional support system, and the main support system comprises the following two types: 1) the construction process of the cast-in-situ bored pile and waterproof curtain enclosure system is developed well, but the slurry treatment has certain problems and also has the quality hidden troubles of hole expansion, pile position deviation and the like; 2) the steel pipe pile and the waterproof curtain enclosure system have the advantages that the steel pipe pile has the advantages of thin wall driving and unobvious soil squeezing effect, but the steel pipe pile essentially still belongs to a separated row pile enclosure structure, and the waterproof curtain needs to be arranged outside a pit.
Therefore, how to keep the advantages of the traditional enclosure system process and make up for the defects is of great significance to improve the deep foundation pit enclosure structure.
Disclosure of Invention
The invention aims to provide a steel pipe pile assembly, a foundation pit support structure and a construction method thereof, so as to make up for the defects of a foundation pit support system in the traditional process.
In order to solve the above technical problems, the present invention provides a steel pipe pile assembly, including: at least two steel pipe piles arranged in parallel and a locking notch pair matched with the steel pipe piles; wherein, two locking notches in each locking notch pair are arranged in axial symmetry relative to the steel pipe pile matched with the locking notches; the locking notches on two adjacent steel pipe piles are mutually occluded and sealed, so that the two steel pipe piles are integrated and the gap between the two steel pipe piles is sealed.
Optionally, in the steel pipe pile assembly, the locking notches in the locking notch pairs are all hot-rolled sleeve type locking notches.
Optionally, in the steel pipe pile assembly, the manner of sealing in the mutual engagement sealing of the locking notches of the two adjacent steel pipe piles is as follows: and sealing the overlapped part of the mutually occluded locking notches by adopting a full-length welding line.
Optionally, in the steel pipe pile assembly, the steel pipe pile is made of Q345B, and the wall thickness of the steel pipe pile is 12mm to 16 mm.
Optionally, in the steel pipe pile assembly, the outer diameter of the steel pipe pile is 700mm to 800 mm.
Optionally, the steel pipe pile assembly includes: the steel pipe piles are arranged in parallel, and a reinforcing ring plate is arranged at the top of the steel pipe pile in the middle.
Optionally, in the steel pipe pile assembly, the thickness of the reinforcing ring plate is 14 mm.
Optionally, the steel pipe pile assembly further includes lifting lugs, and the lifting lugs are arranged on two sides of the reinforcing ring plate.
The invention also provides a foundation pit support structure, which comprises: a plurality of steel pipe pile assemblies as described above.
The invention also provides a construction method of the foundation pit enclosure structure, which comprises the following steps:
transporting the prefabricated steel pipe pile assembly to a construction site;
the following steps are carried out on each side of the foundation pit:
when the steel pipe pile assembly is lifted to be in place, arranging a guide frame at a designed pile position to control the pile sinking verticality of the steel pipe pile assembly;
and performing pile sinking construction on the steel pipe pile assembly.
In the steel pipe pile assembly, the foundation pit support structure and the construction method thereof provided by the invention, the steel pipe pile assembly comprises: at least two steel pipe piles arranged in parallel and a locking notch pair matched with the steel pipe piles; wherein, two locking notches in each locking notch pair are arranged in axial symmetry relative to the steel pipe pile matched with the locking notches; the locking notches on two adjacent steel pipe piles are mutually occluded and sealed, so that the two steel pipe piles are integrated and the gap between the two steel pipe piles is sealed. The steel pipe pile assembly is adopted for foundation pit enclosure, so that an integral steel pipe pile enclosure system integrating soil retaining and anti-permeability performance is formed, and the steel pipe pile assembly is based on good performances of high strength, high rigidity and high stability; in the pile sinking process, the thin wall of the steel pipe pile is driven, the soil squeezing effect is not obvious, and the construction process is simple and the construction efficiency is high; the construction of accessible fore shaft overlap joint between the steel-pipe pile need not to arrange the stagnant water curtain outside the hole, has reduced the production of construction noise and building rubbish, accords with the theory of green construction.
Drawings
Fig. 1 is a schematic structural diagram of a single steel pipe pile in a steel pipe pile assembly and a locking port pair in a matched arrangement in an embodiment of the invention;
FIG. 2 is a top view of a steel pipe pile assembly according to an embodiment of the present invention;
FIG. 3 is a side view of a steel pipe pile assembly according to an embodiment of the invention;
fig. 4 is a partial schematic view of the steel pipe pile assembly according to an embodiment of the present invention, in which locking notches of two adjacent steel pipe piles are engaged and sealed with each other.
In the figure:
1-steel pipe pile;
2-locking the notch;
3-reinforcing ring plate.
Detailed Description
The steel pipe pile assembly, the foundation pit support structure and the construction method thereof according to the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments. Advantages and features of the present invention will become apparent from the following description and from the claims. It is to be noted that the drawings are in a very simplified form and are not to precise scale, which is merely for the purpose of facilitating and distinctly claiming the embodiments of the present invention.
Please refer to fig. 2, which is a top view of a steel pipe pile assembly according to an embodiment of the present invention. As shown in fig. 2, the steel pipe pile assembly includes: at least two
Referring to fig. 2 and 4, fig. 4 is a partial schematic view of the steel pipe pile assembly when the locking notches of two adjacent steel pipe piles are engaged and sealed with each other. The interengaging seal comprises two parts: 1) mutually occluded; 2) and sealing after occlusion. The mutual engagement is the engagement and opposite insertion process of the two
In this embodiment, please refer to fig. 1, fig. 2, and fig. 3, and fig. 1 is a schematic structural diagram of a single steel pipe pile in a steel pipe pile assembly when the single steel pipe pile and a locking opening pair are configured in a matching manner. Fig. 3 is a side view of the steel pipe pile assembly. As shown in fig. 1, 2 and 3, the steel pipe pile assembly includes three
Further, please refer to fig. 1 and fig. 4; as shown in fig. 1 and 4, the steel pipe pile is made of Q345B, and the wall thickness of the steel pipe pile is 12mm to 16 mm; the outer diameter D of the steel pipe pile is 700-800 mm, and the corresponding size is selected according to engineering requirements; in the embodiment, the outer diameter D of the steel pipe pile is 800 mm; b is the effective width of the steel pipe pile, which is equal to the outer diameter D of the steel pipe pile and the total width B of the hot-rolled sleeve type locking notch, wherein the total width B of the hot-rolled sleeve type locking notch is the total width of two engaged hot-rolled sleeve type locking notches, and the proper size is designed according to the selected steel pipe pile; t is the thickness of the hot-rolled sleeve type locking notch, and the proper size can be designed according to the selected steel pipe pile.
In another embodiment, the invention further provides a foundation pit support structure, which comprises a plurality of steel pipe pile assemblies as described above, so as to perform foundation pit support construction. Specifically, the construction process of the foundation pit support structure is as follows: hot-rolling sleeve type locking notch welding is carried out simultaneously in a steel pipe pile prefabricating factory to realize prefabrication of a steel pipe pile assembly; and then, the prefabricated steel pipe pile assembly is transported to a construction site through a transport vehicle, the truck crane is matched with pile machine equipment, lifting lugs of the reinforcing ring plate are used for lifting and positioning, meanwhile, a guide frame is arranged at a designed pile position to control pile sinking verticality of the steel pipe pile assembly, and finally, a resonance-free hydraulic vibration hammer is selected for carrying out primary pile sinking operation to complete construction of the steel pipe pile assembly on one side of the foundation pit, so that the foundation pit support structure with accurate positioning, simple process and soil blocking and permeability resistance in an integrated manner under a complex environment is realized. In the whole construction process, each side of the foundation pit is hoisted once and sunk once, the construction of a steel pipe pile assembly is completed once, the whole process is simple, and the construction speed is high.
The steel pipe pile assembly provided by the invention is used for construction of a foundation pit enclosure structure system, and has the following advantages:
1) the locking notch pairs are arranged on the steel pipe piles in a matched mode, and locking notches on two adjacent steel pipe piles are mutually occluded and sealed to form a good water stopping effect;
2) the steel pipe pile assembly is adopted for pile sinking construction, the field process is simple, and the construction speed is high;
3) the method has the advantages of low requirement on construction sites, low pollution to surrounding environment and high greening construction degree.
The above description is only for the purpose of describing the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention, and any variations and modifications made by those skilled in the art based on the above disclosure are within the scope of the appended claims.
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