Rapidly constructed steel pipe pile enclosure structure and its construction method

Abstract

The invention discloses a fast-constructed steel pipe pile enclosure structure and a construction method thereof, comprising a plurality of steel pipe pile monomers, each two adjacent steel pipe pile monomers are connected by a grouting pipe reinforcement soil filling structure to form an enclosure structure; each grouting pipe reinforcement soil filling structure comprises an upper gap steel pipe and a lower gap steel pipe respectively arranged on two adjacent steel pipe pile monomers; each upper gap steel pipe is arranged on the outer side wall of the corresponding steel pipe pile monomer close to the upper end, and each lower gap steel pipe is arranged on the outer side wall of the corresponding steel pipe pile monomer close to the lower end; each upper gap steel pipe and each lower gap steel pipe are respectively provided with an outer grouting pipe and an inner grouting pipe, and a grouting pipe reinforcement soil filling structure that fills and wraps each upper gap steel pipe and each lower gap steel pipe is formed by grouting the outer grouting pipe and the inner grouting pipe. The application of the invention makes the construction of the foundation pit enclosure structure have stronger fault tolerance, higher construction efficiency, stronger waterproofness and more green environmental protection.

Description

Technical Field

[0001] The invention relates to the technical field of enclosure structure construction, in particular to a fast-constructed steel pipe pile enclosure structure and a construction method thereof. Background Art

[0002] In recent years, construction land has become increasingly scarce, and the development of urban underground space is imminent. At present, the development of underground space is mostly concentrated in shallow space (0-15m underground), mainly implemented by open-cut and trenchless methods. The open-cut method has the advantages of mature technology and strong adaptability, and is widely used when the excavation depth of the foundation pit is not deep.

[0003] However, the common foundation pit retaining system is a reinforced concrete structure, which has a slow construction speed and huge engineering costs, and is eventually abandoned underground, wasting a lot of building materials. At the same time, the abandoned retaining piles also become obstacles to the middle space of the existing shallow underground space without excavation, which in turn makes part of the underground space unusable.

[0004] Therefore, how to achieve rapid construction and green and environmentally friendly construction of foundation pit retaining structures has become a technical problem that technical personnel in this field urgently need to solve. Summary of the invention

[0005] In view of the above-mentioned defects of the prior art, the present invention provides a rapidly constructed steel pipe pile retaining structure and a construction method thereof, the purpose of which is to make the construction of the foundation pit retaining structure have stronger fault tolerance, higher construction efficiency, stronger waterproofness and more environmental protection.

[0006] To achieve the above-mentioned purpose, the present invention discloses a rapidly constructed steel pipe pile enclosure structure, which comprises a plurality of steel pipe pile monomers.

[0007] Wherein, except for the first driven steel pipe pile monomer and the last driven steel pipe pile monomer, every other two adjacent steel pipe pile monomers are connected by a grouting pipe reinforced soil filling structure to form the enclosure structure;

[0008] Each of the grouting pipe reinforced soil filling structures comprises an upper gap steel pipe and a lower gap steel pipe respectively arranged on two adjacent steel pipe pile monomers;

[0009] Each of the upper gap steel pipes is arranged on the outer side wall of the corresponding steel pipe pile monomer close to the upper end, the upper end is flush with the corresponding steel pipe pile monomer, and the length of each of the upper gap steel pipes is greater than the distance from the ground to the bottom of the foundation pit, and less than the length of the corresponding steel pipe pile monomer;

[0010] Each of the lower gap steel pipes is arranged on the outer side wall of the corresponding steel pipe pile monomer near the lower end, the lower end is flush with the corresponding steel pipe pile monomer, and the upper end is spaced at least 5 cm from the lower end of the corresponding upper gap steel pipe;

[0011] Each of the upper gap steel pipes and each of the lower gap steel pipes is respectively provided with an outer grouting pipe and an inner grouting pipe, and grouting is performed through the outer grouting pipe and the inner grouting pipe to form the grouting pipe reinforced soil filling structure that fills and wraps each of the upper gap steel pipes and each of the lower gap steel pipes.

[0012] Preferably, each of the upper gap steel pipes and each of the lower gap steel pipes are fixedly connected to the corresponding steel pipe pile monomer by welding.

[0013] Preferably, the outer side wall of the first driven steel pipe pile monomer is provided with the lower gap steel pipe and the socket of the Shougang pipe conventional steel pipe pile joint, and the lower gap steel pipe of the first driven steel pipe pile monomer matches the upper gap steel pipe of the second driven steel pipe pile monomer;

[0014] The outer side wall of the last driven steel pipe pile monomer is provided with the upper gap steel pipe and the socket of the conventional steel pipe pile joint, and the upper gap steel pipe of the last driven steel pipe pile monomer matches the lower gap steel pipe of the second last driven steel pipe pile monomer;

[0015] The first driven steel pipe pile monomer and the last driven steel pipe pile monomer are connected by conventional sockets.

[0016] The present invention also provides a construction method for a fast-constructed steel pipe pile enclosure structure, the steps of which are as follows:

[0017] Step 1, prefabricate all the steel pipe pile monomers, and set the corresponding upper gap steel pipe and the lower gap steel pipe on each of the steel pipe pile monomers;

[0018] Step 2: Use a resonance-free hydraulic vibration hammer to drive each of the steel pipe pile monomers into the ground in accordance with the design requirements, and reserve a gap of at least 5 cm between the lower end of the upper gap steel pipe and the upper end of the lower gap steel pipe corresponding to each two adjacent steel pipe pile monomers;

[0019] Step 3: During the process of driving each of the steel pipe piles, grouting reinforcement is performed corresponding to each pair of matching upper gap steel pipes and lower gap steel pipes;

[0020] Step 4: the first driven steel pipe pile monomer and the last driven steel pipe pile monomer are connected in a conventional manner to form a maintenance structure; excavation of the foundation pit, construction of internal purlins and internal supports, construction of the main structure, and backfilling of the soil;

[0021] Step 5: Remove the steel pipe piles in sequence in the opposite direction to the order in which they were driven in.

[0022] Preferably, in step 3, the steps of grouting reinforcement of each grouting pipe reinforced soil filling structure are as follows:

[0023] The outer grouting pipe arranged on the upper slotted steel pipe extends through the upper slotted steel pipe into the gap between the outer side wall of the corresponding lower slotted steel pipe and the outer side wall of the corresponding steel pipe pile monomer, and grouting reinforcement is started from between two adjacent steel pipe pile monomers, near the bottom position;

[0024] The inner grouting pipe arranged in the lower gap steel pipe directly extends from the ground into the lower gap steel pipe, and grouting reinforcement starts from the lower gap steel pipe;

[0025] The first driven steel pipe pile monomer and the last driven steel pipe pile monomer are connected by conventional sockets.

[0026] Beneficial effects of the present invention:

[0027] The application of the present invention allows the enclosure system to be fully recycled and reused, reducing a large number of abandoned projects, saving resources to the greatest extent, reducing project costs, and realizing green construction; the removal of abandoned pile foundations protects and saves underground space resources to the greatest extent.

[0028] The concept, specific structure and technical effects of the present invention will be further described below in conjunction with the accompanying drawings to fully understand the purpose, characteristics and effects of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A schematic structural diagram of a steel pipe pile monomer in one embodiment of the present invention is shown.

[0030] Figure 2 A schematic structural diagram of a first driven steel pipe pile monomer in an embodiment of the present invention is shown.

[0031] Figure 3 A schematic structural diagram of the last driven steel pipe pile monomer in one embodiment of the present invention is shown.

[0032] Figure 4 A schematic diagram of the cross-sectional structure of a steel pipe pile monomer in one embodiment of the present invention is shown.

[0033] Figure 5 A schematic structural diagram of two adjacent steel pipe pile units in one embodiment of the present invention is shown.

[0034] Figure 6 A schematic diagram of the structure of two adjacent steel pipe piles after grouting reinforcement in one embodiment of the present invention is shown.

[0035] Figure 7A schematic diagram of the cross-sectional structure of two adjacent steel pipe piles after grouting reinforcement in one embodiment of the present invention is shown. DETAILED DESCRIPTION

[0036] Example

[0037] like Figures 1 to 7 As shown, the rapidly constructed steel pipe pile enclosure structure comprises a plurality of steel pipe pile units 1.

[0038] Except for the first driven steel pipe pile monomer 1 and the last driven steel pipe pile monomer 1, every other two adjacent steel pipe pile monomers 1 are connected by a grouting pipe reinforced soil filling structure 6 to form a retaining structure;

[0039] Each grouting pipe reinforced soil filling structure 6 comprises an upper gap steel pipe 2 and a lower gap steel pipe 3 respectively arranged on two adjacent steel pipe pile monomers 1;

[0040] Each upper gap steel pipe 2 is arranged on the outer side wall of the corresponding steel pipe pile monomer 1 close to the upper end, and the upper end is flush with the corresponding steel pipe pile monomer 1, and the length of each upper gap steel pipe 2 is greater than the distance from the ground to the bottom of the foundation pit, and less than the length of the corresponding steel pipe pile monomer 1;

[0041] Each lower gap steel pipe 3 is arranged on the outer side wall of the corresponding steel pipe pile monomer 1 near the lower end, the lower end is flush with the corresponding steel pipe pile monomer 1, and the upper end is at least 5 cm away from the lower end of the corresponding upper gap steel pipe 2;

[0042] Each upper gap steel pipe 2 and each lower gap steel pipe 3 are respectively provided with an outer grouting pipe 4 and an inner grouting pipe 5, and grouting is performed through the outer grouting pipe 4 and the inner grouting pipe 5 to form a grouting pipe reinforced soil filling structure 6 that fills and wraps each upper gap steel pipe 2 and each lower gap steel pipe 3.

[0043] In some embodiments, each upper slot steel pipe 2 and each lower slot steel pipe 3 are fixedly connected to the corresponding steel pipe pile monomer 1 by welding.

[0044] The principle of the present invention is as follows:

[0045] The steel pipe pile monomer 1, the upper gap steel pipe 2 and the lower gap steel pipe 3 form a basic monomer structure, which is connected by a grouting pipe reinforced soil filling structure 6 to form the main force-bearing structure of the foundation pit, and has the functions of strong fault tolerance, high construction efficiency, strong waterproofness, green environmental protection, etc.

[0046] The steel pipe pile monomer 1 is the main force-bearing structure, and the grouting is used to form a grouting pipe reinforced soil filling structure 6 that fills and wraps each upper gap steel pipe 2 and each lower gap steel pipe 3 to ensure the formation of a closed structure.

[0047] The outer grouting pipe 4 and the inner grouting pipe 5 simultaneously perform grouting reinforcement on the inside and outside of the upper gap steel pipe 2 and the lower gap steel pipe 3 to further ensure their sealing properties.

[0048] After the construction is completed, the steel pipe pile unit 1, the upper gap steel pipe 2 and the lower gap steel pipe 3 can be pulled out, recovered and reused. Moreover, this structure can meet the requirements of foundation pit retaining of any shape and has stronger applicability.

[0049] In some embodiments, the outer side wall of the first driven steel pipe pile monomer 1 is provided with a lower gap steel pipe 3 and a socket 7a of a conventional steel pipe pile joint of Shougang pipe, and the lower gap steel pipe 3 of the first driven steel pipe pile monomer 1 matches the upper gap steel pipe 2 of the second driven steel pipe pile monomer 1;

[0050] The outer side wall of the last driven steel pipe pile monomer 1 is provided with an upper gap steel pipe 2 and a socket 7b of a conventional steel pipe pile joint of the tail steel pipe, and the upper gap steel pipe 2 of the last driven steel pipe pile monomer 1 matches the lower gap steel pipe 3 of the second last driven steel pipe pile monomer 1;

[0051] The first driven steel pipe pile monomer 1 and the last driven steel pipe pile monomer 1 are connected by a conventional socket.

[0052] The present invention also provides a construction method for a fast-constructed steel pipe pile enclosure structure, the steps of which are as follows:

[0053] Step 1, prefabricate all steel pipe pile monomers 1, and set corresponding upper gap steel pipe 2 and lower gap steel pipe 3 on each steel pipe pile monomer 1;

[0054] Step 2: Use a resonance-free hydraulic vibration hammer to drive each steel pipe pile monomer 1 into the ground in turn according to the design requirements, and reserve a gap of at least 5 cm between the lower end of the upper gap steel pipe 2 and the upper end of the lower gap steel pipe 3 corresponding to each two adjacent steel pipe pile monomers 1;

[0055] Step 3: During the process of driving each steel pipe pile monomer 1, grouting reinforcement is performed corresponding to each pair of matching upper gap steel pipes 2 and lower gap steel pipes 3;

[0056] Step 4: The first driven steel pipe pile monomer 1 and the last driven steel pipe pile monomer 1 are connected in a conventional manner to form a maintenance structure; excavation of the foundation pit, construction of internal purlins and internal supports, construction of the main structure, and backfilling of the soil;

[0057] Step 5: Remove the steel pipe piles in sequence in the opposite direction to the order in which they were driven in.

[0058] In some embodiments, in step 3, the steps of grouting reinforcement of each grouting pipe reinforced soil filling structure 6 are as follows:

[0059] The outer grouting pipe 4 arranged on the upper slot steel pipe 2 extends through the upper slot steel pipe 2 into the gap between the outer side wall of the corresponding lower slot steel pipe 3 and the outer side wall of the corresponding steel pipe pile monomer 1, and grouting reinforcement starts from between two adjacent steel pipe pile monomers 1, near the bottom position;

[0060] The inner grouting pipe 5 arranged in the lower gap steel pipe 3 directly extends from the ground into the lower gap steel pipe 3, and grouting reinforcement is started from the lower gap steel pipe 3;

[0061] The first driven steel pipe pile monomer 1 and the last driven steel pipe pile monomer 1 are reinforced by conventional methods, and the reinforcement range is from the bottom of the pile to the ground.

[0062] The preferred specific embodiments of the present invention are described in detail above. It should be understood that a person skilled in the art can make many modifications and changes based on the concept of the present invention without creative work. Therefore, any technical solution that can be obtained by a person skilled in the art through logical analysis, reasoning or limited experiments based on the concept of the present invention on the basis of the prior art should be within the scope of protection determined by the claims.

Claims

1. A rapidly constructed steel pipe pile enclosure structure, comprising a plurality of steel pipe pile units (1); characterized in that: Except for the first driven steel pipe pile monomer (1) and the last driven steel pipe pile monomer (1), every other two adjacent steel pipe pile monomers (1) are connected by a grouting pipe reinforced soil filling structure (6) to form the enclosure structure; Each of the grouting pipe reinforced soil filling structures (6) comprises an upper gap steel pipe (2) and a lower gap steel pipe (3) respectively arranged on two adjacent steel pipe pile units (1); Each of the upper gap steel pipes (2) is arranged on the outer side wall of the corresponding steel pipe pile monomer (1) close to the upper end, the upper end is flush with the corresponding steel pipe pile monomer (1), and the length of each of the upper gap steel pipes (2) is greater than the distance from the ground to the bottom of the foundation pit, and less than the length of the corresponding steel pipe pile monomer (1); Each of the lower gap steel pipes (3) is arranged on the outer side wall of the corresponding steel pipe pile monomer (1) near the lower end, the lower end is flush with the corresponding steel pipe pile monomer (1), and the upper end is spaced at least 5 cm from the lower end of the corresponding upper gap steel pipe (2); Each of the upper gap steel pipes (2) and each of the lower gap steel pipes (3) is respectively provided with an outer grouting pipe (4) and an inner grouting pipe (5), and grouting is performed through the outer grouting pipe (4) and the inner grouting pipe (5) to form the grouting pipe reinforced soil filling structure (6) that fills and wraps each of the upper gap steel pipes (2) and each of the lower gap steel pipes (3).

2. The steel pipe pile enclosure structure for rapid construction according to claim 1 is characterized in that: Each of the upper slot steel pipes (2) and each of the lower slot steel pipes (3) are fixedly connected to the corresponding steel pipe pile monomer (1) by welding.

3. The fast-constructed steel pipe pile enclosure structure according to claim 1 is characterized in that: The lower gap steel pipe (3) and the socket (7a) of the Shougang conventional steel pipe pile joint are arranged on the outer side wall of the first driven steel pipe pile monomer (1), and the lower gap steel pipe (3) of the first driven steel pipe pile monomer (1) matches the upper gap steel pipe (2) of the second driven steel pipe pile monomer (1); The upper slotted steel pipe (2) and the socket (7b) of the conventional steel pipe pile joint of the tail steel pipe are arranged on the outer side wall of the last driven steel pipe pile monomer (1), and the upper slotted steel pipe (2) of the last driven steel pipe pile monomer (1) matches the lower slotted steel pipe (3) of the second last driven steel pipe pile monomer (1); The first driven steel pipe pile monomer (1) and the last driven steel pipe pile monomer (1) are connected by using a conventional socket.

4. The construction method of the steel pipe pile enclosure structure for rapid construction according to claim 3 comprises the following steps: Step 1, prefabricate all the steel pipe pile monomers (1), and set the corresponding upper slot steel pipe (2) and the lower slot steel pipe (3) on each of the steel pipe pile monomers (1); Step 2: using a resonance-free hydraulic vibration hammer to drive each of the steel pipe pile monomers (1) into the ground in turn according to the design requirements, leaving a gap of at least 5 cm between the lower end of the upper gap steel pipe (2) and the upper end of the lower gap steel pipe (3) corresponding to each two adjacent steel pipe pile monomers (1); Step 3, during the process of driving each of the steel pipe pile monomers (1), grouting reinforcement is performed corresponding to each pair of matching upper gap steel pipes (2) and lower gap steel pipes (3); Step 4: After the first driven steel pipe pile monomer (1) and the last driven steel pipe pile monomer (1) are connected by the conventional socket, a retaining structure is formed; excavation of the foundation pit, construction of internal purlins and internal supports, construction of the main structure, and backfilling of the soil; Step 5: Remove the steel pipe piles in sequence in the opposite direction to the order in which they were driven in.

5. The construction method of the steel pipe pile enclosure structure for rapid construction according to claim 4 is characterized in that: In step 3, the steps of grouting reinforcement of each grouting pipe reinforced soil filling structure (6) are as follows: The outer grouting pipe (4) arranged on the upper slotted steel pipe (2) extends through the upper slotted steel pipe (2) into the gap between the outer side wall of the corresponding lower slotted steel pipe (3) and the outer side wall of the corresponding steel pipe pile monomer (1), and grouting reinforcement starts from between two adjacent steel pipe pile monomers (1) near the bottom; The inner grouting pipe (5) arranged in the lower gap steel pipe (3) directly extends from the ground into the lower gap steel pipe (3), and grouting reinforcement starts from the inside of the lower gap steel pipe (3).

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