Steel pipe pile supporting structure and construction method thereof

Abstract

The invention discloses a steel pipe pile supporting structure and a construction method thereof. Comprising a plurality of steel pipe piles which are arranged in a soil body of a to-be-supported part at intervals, stiffening plates which are arranged in the steel pipe piles and arranged in the trend of the steel pipe piles, top beams arranged at the tops of the steel pipe piles and supporting beams which are obliquely connected with the steel pipe piles and extend to the bottom face of an excavated foundation pit. The stiffening plate extends out of the steel pipe pile and enters the crown beam; the bending strength of the steel pipe pile is enhanced by adding the stiffening plate in the steel pipe pile, meanwhile, the stiffening plate extends into the top beam and is poured together with the top beam, a stable anchoring effect is formed, the connection strength of the top beam and the steel pipe pile is enhanced, and further, through the arrangement of the supporting beam, the supporting effect is improved. A lateral supporting force is provided for the whole connecting structure of the steel pipe pile and the crown beam, in conclusion, the stability of the whole steel pipe pile supporting structure is improved, and then the purpose of improving the supporting effect is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of foundation pit excavation maintenance, and in particular to a steel pipe pile supporting structure and a construction method thereof. Background Art

[0002] With the rapid development of infrastructure and the shortage of urban land, buildings are bound to develop in the direction of "higher and deeper". The deeper the building, the more complex the foundation pit will be. At the same time, due to the influence of complex environmental factors such as surrounding buildings and underground structures, the construction space of the foundation pit is getting smaller and smaller, which requires the support structure to strictly control the construction area.

[0003] In the process of modern foundation pit operations, it is necessary not only to ensure the stability of the foundation pit but also to ensure the safety and convenience of operations within the pit, and to control the movement of soil at the bottom of the pit and outside the pit within a certain range to ensure the normal use of adjacent buildings and municipal facilities. Therefore, the foundation pit needs to be enclosed during operations.

[0004] During the foundation pit construction, in order to ensure the safety of the surrounding environment of the foundation pit, support and reinforcement measures must be taken for the foundation pit. At present, under the premise that the construction area of ​​the support structure is not restricted, the support type of pile row is mostly used.

[0005] However, the supporting strength and effect of the current foundation pit supporting structure are limited. In order to further enhance the supporting effect and strength, the present invention provides a steel pipe pile supporting structure and a construction method thereof. Summary of the invention

[0006] The purpose of the present invention is to provide a steel pipe pile support structure and a construction method thereof, which solves the problem of poor stability of the previous steel pipe pile support.

[0007] To achieve the above object, the present invention provides the following solutions:

[0008] A steel pipe pile support structure comprises a plurality of steel pipe piles arranged at intervals in the soil of a supported part, a stiffening plate arranged in the steel pipe piles and along the direction of the steel pipe piles, a crown beam arranged on the top of the steel pipe piles, and a support beam obliquely connected to the steel pipe piles and extending to the bottom of an excavated foundation pit, concrete is poured in the steel pipe piles, and the stiffening plate extends out of the steel pipe piles and enters the crown beam.

[0009] Preferably, the cross section of the stiffening plate is cross-shaped, and the four ends of the stiffening plate are connected to the inner wall of the steel pipe pile.

[0010] Preferably, main reinforcement is arranged inside the crown beam, a through hole is opened in the area where the stiffening plate extends into the crown beam, and the main reinforcement in the crown beam passes through the through hole.

[0011] Preferably, the support beam is an I-beam.

[0012] Preferably, the I-beam is connected to the outer wall of the steel pipe pile through a connecting piece, and the connecting piece includes a group of semi-annular clamps sleeved on the outer wall of the steel pipe pile, and straight plates are provided at both ends of the semi-annular clamps, and bolt holes are opened on the straight plates. An installation channel is formed between the corresponding two straight plates, and the web of the I-beam extends into the installation channel, and the straight plates are clamped and connected with the web by bolts passing through the bolt holes and the web of the I-beam.

[0013] Preferably, it also includes a fixed pier arranged at the bottom of the foundation pit, and the I-beam is arranged in the fixed pier.

[0014] Preferably, the I-beam is arranged on the steel pipe pile located at the edge.

[0015] Preferably, a connecting pipe is provided between adjacent steel pipe piles, and both ends of the connecting pipe are welded to the steel pipe piles.

[0016] A construction method of a steel pipe pile supporting structure comprises the following steps:

[0017] Steel pipe piles with stiffening plates prefabricated and installed in the processing plant;

[0018] Driving steel pipe piles into the soil layer according to design requirements, pouring concrete into the steel pipe piles, and reserving stiffening plates extending from the steel pipe piles;

[0019] Tie the main reinforcement of the crown beam on the top of the steel pipe pile and tie the main reinforcement and the stiffening plate together, and pour the crown beam concrete;

[0020] A support beam is installed on the steel pipe pile.

[0021] Preferably, the concrete poured into the steel pipe piles is UHPC concrete.

[0022] Compared with the prior art, the present invention has achieved the following technical effects:

[0023] The present invention enhances the bending strength of the steel pipe piles themselves by adding stiffening plates to the steel pipe piles. At the same time, the stiffening plates extend into the crown beam and are cast together with the crown beam to form a stable anchoring effect, thereby strengthening the connection strength between the crown beam and the steel pipe piles. Furthermore, through the provision of support beams, a lateral supporting force is provided for the entire connection structure of the steel pipe piles and the crown beam. In summary, the stability of the entire steel pipe pile support structure is improved, thereby achieving the purpose of improving the support effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 It is a front view of the present invention;

[0026] Figure 2 It is a side view of the present invention;

[0027] Figure 3 A top view of a steel pipe pile of the present invention;

[0028] Figure 4 This is the enlarged view of point A;

[0029] Among them, 1. crown beam; 2. steel pipe piles; 3. connecting pipes; 4. stiffening plates; 5. fixed piers; 6. supporting beams; 7. bolts; 8. semi-circular splints; 9. straight plates. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] The purpose of the present invention is to provide a steel pipe pile support structure and a construction method thereof, which solves the problem of poor stability of the previous steel pipe pile support.

[0032] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0033] refer to Figures 1 to 4, a steel pipe pile supporting structure, comprising a plurality of steel pipe piles arranged in an interval arrangement in the soil body of a supported part, a stiffening plate arranged in the steel pipe piles and along the direction of the steel pipe piles, a crown beam arranged on the top of the steel pipe piles, and a supporting beam obliquely connected to the steel pipe piles and extending to the bottom surface of an excavated foundation pit, wherein concrete is poured into the steel pipe piles, and the stiffening plate extends out of the steel pipe piles and enters the crown beam; the present invention enhances the bending strength of the steel pipe piles themselves by adding stiffening plates to the steel pipe piles, and at the same time, the stiffening plate extends into the crown beam and is cast together with the crown beam to form a stable anchoring effect, thereby enhancing the connection strength between the crown beam and the steel pipe piles, and further, through the setting of the supporting beam, a lateral supporting force is provided to the entire connection structure of the steel pipe piles and the crown beam. In summary, the stability of the entire steel pipe pile supporting structure is improved, thereby achieving the purpose of improving the support effect.

[0034] refer to Figure 3 The cross section of the stiffening plate is cross-shaped, and the four ends of the stiffening plate are connected to the inner wall of the steel pipe pile; the cross-shaped cross section further ensures the stability of the steel pipe pile structure itself.

[0035] Furthermore, main reinforcement is arranged inside the crown beam, and a through hole is opened in the area where the stiffening plate extends into the crown beam, and the main reinforcement in the crown beam passes through the through hole; the purpose is to ensure that the stiffening plate and the crown beam form an anchoring shape and enhance the connection effect between the steel pipe pile and the crown beam.

[0036] refer to Figure 4 , the support beam is an I-beam.

[0037] refer to Figure 4 The I-beam is connected to the outer wall of the steel pipe pile through a connecting piece, and the connecting piece includes a group of semi-annular clamping plates sleeved on the outer wall of the steel pipe pile, and straight plates are provided at both ends of the semi-annular clamping plates, and bolt holes are opened on the straight plates. An installation channel is formed between the corresponding two straight plates, and the web of the I-beam extends into the installation channel, and the straight plates are clamped and connected with the web by bolts passing through the bolt holes and the web of the I-beam.

[0038] refer to Figure 2 , and also includes a fixed pier arranged at the bottom of the foundation pit, in which the I-beam is arranged; the fixed pier is a reinforced concrete entity, in which one end of the I-beam is cast to ensure the stable support of the I-beam at this point.

[0039] refer to Figure 2 , the I-beam is arranged on the steel pipe pile located at the edge.

[0040] refer to Figure 1 A connecting pipe is provided between adjacent steel pipe piles, and both ends of the connecting pipe are welded to the steel pipe piles.

[0041] A construction method of a steel pipe pile supporting structure comprises the following steps:

[0042] Steel pipe piles with stiffening plates prefabricated and installed in the processing plant;

[0043] Driving steel pipe piles into the soil layer according to design requirements, pouring concrete into the steel pipe piles, and reserving stiffening plates extending from the steel pipe piles;

[0044] Tie the main reinforcement of the crown beam on the top of the steel pipe pile and tie the main reinforcement and the stiffening plate together, and pour the crown beam concrete;

[0045] A support beam is installed on the steel pipe pile.

[0046] Furthermore, the concrete poured into the steel pipe piles is UHPC concrete.

[0047] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A steel pipe pile support structure, characterized in that: It includes a number of steel pipe piles arranged at intervals in the soil of the supported part, stiffening plates arranged in the steel pipe piles and along the direction of the steel pipe piles, a crown beam arranged on the top of the steel pipe piles, and a supporting beam obliquely connected to the steel pipe piles and extending to the bottom of the excavated foundation pit. Concrete is poured in the steel pipe piles, and the stiffening plates extend out of the steel pipe piles and enter the crown beam.

2. The steel pipe pile supporting structure according to claim 1, characterized in that: The cross section of the stiffening plate is cross-shaped, and the four ends of the stiffening plate are connected to the inner wall of the steel pipe pile.

3. The steel pipe pile supporting structure according to claim 1, characterized in that: The crown beam is provided with main reinforcement inside, and a through hole is opened in the area where the stiffening plate extends into the crown beam, and the main reinforcement in the crown beam passes through the through hole.

4. The steel pipe pile supporting structure according to claim 1, characterized in that: The support beam is an I-beam.

5. The steel pipe pile supporting structure according to claim 4, characterized in that: The I-beam is connected to the outer wall of the steel pipe pile through a connecting piece, and the connecting piece includes a group of semi-annular clamping plates sleeved on the outer wall of the steel pipe pile, and straight plates are provided at both ends of the semi-annular clamping plates, and bolt holes are opened on the straight plates, and an installation channel is formed between the corresponding two straight plates. The web of the I-beam extends into the installation channel, and the straight plates are clamped and connected with the web by bolts passing through the bolt holes and the web of the I-beam.

6. The steel pipe pile supporting structure according to claim 5, characterized in that: It also includes a fixed pier arranged at the bottom of the foundation pit, and the I-beam is arranged in the fixed pier.

7. The steel pipe pile supporting structure according to claim 5, characterized in that: The I-beam is arranged on the steel pipe pile located at the edge.

8. The steel pipe pile supporting structure according to claim 1, characterized in that: A connecting pipe is arranged between adjacent steel pipe piles, and both ends of the connecting pipe are welded to the steel pipe piles.

9. A construction method for a steel pipe pile support structure, characterized in that: A steel pipe pile support structure as claimed in any one of claims 1 to 7, comprising the following steps: Steel pipe piles with stiffening plates prefabricated and installed in the processing plant; Driving steel pipe piles into the soil layer according to design requirements, pouring concrete into the steel pipe piles, and reserving stiffening plates extending from the steel pipe piles; Tie the main reinforcement of the crown beam on the top of the steel pipe pile and tie the main reinforcement and the stiffening plate together, and pour the crown beam concrete; A support beam is installed on the steel pipe pile.

10. The construction method of the steel pipe pile support structure according to claim 9, characterized in that: The concrete poured into the steel pipe pile is UHPC concrete.

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