Prefabricated pipe pile structure penetrating underground existing reinforced concrete structure
The precast pipe pile structure with an inner and outer sleeve stabilizes the soil and enhances pile strength by penetrating existing reinforced concrete structures, reducing excavation needs and environmental disruption.
Patent Information
- Application Number
- CN202422378282.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-29
- Publication Date
- 2025-07-15
- Estimated Expiration
- 2034-09-29
AI Technical Summary
When the prefabricated pipe piles overlap the space of the underground waste reinforced concrete culvert, the construction efficiency is low and the cost is high, which seriously damages the current terrain and poor environmental protection of the construction.
The outer casing and inner casing structure are adopted. The outer casing is inserted into the soil and contacts the existing reinforced concrete structure underground. The inner casing passes through the concrete structure and is filled with concrete. The sealing structure seals the gap. The prefabricated pipe pile body is arranged in the inner casing and is filled with concrete to form a stable pile body structure.
It improves construction efficiency, reduces construction costs, reduces damage to the current terrain, and improves the environmental protection of construction.
Smart Images
Figure CN223103619U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of precast piles, and particularly relates to a precast pipe pile structure for passing through an existing underground reinforced concrete structure. Background Art
[0002] With the rapid development of urban and highway transportation, the construction of infrastructure is also changing with each passing day. The transportation systems in aspects such as municipal and highway are becoming more and more developed, and the rapid development of the transportation network has brought more and more convenience to people's travel. During the urban construction process, due to the disorderly and extensive development in the early stage, there are many abandoned underground reinforced concrete culverts. Inevitably, the spatial positions of the newly built precast pipe piles in the later stage overlap with those of the abandoned underground reinforced concrete culverts.
[0003] At present, for the situation where the spatial positions of precast pipe piles and abandoned underground reinforced concrete culverts overlap, usually, after the culverts are demolished by large excavation, the precast pipe piles are driven according to the normal process. However, for the situation where one side adjacent to the culvert is a completed residential building, the space for open large excavation is limited, slope support is required, the construction efficiency is low, the measure cost is high, the existing terrain is severely damaged, and the construction environmental protection is poor. Summary of the Utility Model
[0004] Based on this, in view of the problems of low construction efficiency, high measure cost, severe damage to the existing terrain, and poor construction environmental protection caused by the method of demolishing the culvert by large excavation and then driving the precast pipe piles for the situation where the spatial positions of precast pipe piles and abandoned underground reinforced concrete culverts overlap, it is necessary to provide a precast pipe pile structure for passing through an existing underground reinforced concrete structure.
[0005] A precast pipe pile structure for passing through an existing underground reinforced concrete structure includes:
[0006] An outer casing, inserted into the soil body, and the outer casing is inserted until it contacts the existing underground reinforced concrete structure;
[0007] An inner casing, passing through the outer casing, the inner casing passes downward through the existing underground reinforced concrete structure, and the gap between the outer casing and the inner casing is filled with concrete;
[0008] A precast pipe pile body, passing through the inner casing, and the gap between the precast pipe pile body and the inner casing is filled with concrete.
[0009] In one embodiment, it further includes a sealing structure, the sealing structure is arranged between the outer casing and the inner casing, and the sealing structure is used to seal the gap between the inner casing and the existing underground reinforced concrete structure.
[0010] In one embodiment, the sealing structure includes an inflatable capsule, which is filled between the outer casing and the inner casing, and the inflatable capsule seals the gap between the inner casing and the existing underground reinforced concrete structure.
[0011] In one embodiment, the sealing structure further includes a steel ring, which is sleeved on the inner casing between the outer casing and the inner casing, and the air inlet pipe of the inflatable capsule extends to the ground through a reserved hole on the steel ring.
[0012] In one embodiment, cement mortar is injected into the inflatable capsule through the air inlet pipe.
[0013] In one embodiment, the inner casing penetrates the existing underground reinforced concrete structure by a preset distance, and the preset distance is not less than 30 cm.
[0014] In one embodiment, the existing underground reinforced concrete structure is provided with a hole for the inner casing to pass through, and the diameter of the hole is 100 mm larger than that of the inner casing.
[0015] In one embodiment, the existing underground reinforced concrete structure has a cavity, and a strengthening structure is provided inside the precast pipe pile body, and the strengthening structure strengthens the part of the precast pipe pile body located in the cavity and penetrating the existing underground reinforced concrete structure.
[0016] In one embodiment, the strengthening structure includes a steel reinforcement cage and concrete filled and compacted by pouring.
[0017] In one embodiment, the outer casing, the inner casing and the precast pipe pile body are coaxially arranged.
[0018] For the above precast pipe pile structure passing through the existing underground reinforced concrete structure, the outer casing can stabilize the surrounding soil and prevent the collapse of the hole, which may affect the adjacent pile foundations. The filled concrete between the outer casing and the inner casing can fix the inner casing, and at the same time block the bottom opening of the outer casing to prevent the soil from subsiding. The inner casing passing through the existing underground reinforced concrete structure can improve the shear strength of the precast pile and create an installation space for the precast pipe pile body. The concrete between the inner casing and the precast pipe pile body can stably support the precast pipe pile body. For this precast pipe pile structure, the inner casing directly passes through the existing underground reinforced concrete structure, providing construction conditions for the precast pipe pile, eliminating the need for large-scale excavation to demolish the culvert, which can improve the construction efficiency, reduce the construction cost, reduce the damage to the current terrain, and has high construction environmental protection. Description of the Drawings
[0019] In order to more clearly illustrate the specific embodiments of the present utility model, the drawings required for use in the specific embodiments will be briefly introduced below. In all the drawings, the elements or parts are not necessarily drawn to actual scale.
[0020] Figure 1 It is a schematic structural diagram of a precast pipe pile structure passing through an existing underground reinforced concrete structure in an embodiment;
[0021] Figure 2 It is Figure 1 a partial enlarged view of part A in
[0022] Figure 3 It is a schematic diagram of inserting the outer casing into the soil body;
[0023] Figure 4 It is a schematic diagram after drilling holes in the existing underground reinforced concrete structure;
[0024] Figure 5 It is a schematic diagram of installing the inner casing inside the outer casing;
[0025] Figure 6 It is a schematic diagram of installing the sealing structure between the outer casing and the inner casing;
[0026] Figure 7 It is a schematic diagram of inflating the inflatable capsule to seal the gap between the inner casing and the existing underground reinforced concrete structure;
[0027] Figure 8 It is a schematic diagram of pouring concrete between the outer casing and the inner casing;
[0028] Figure 9 It is a schematic diagram of injecting high-strength cement mortar into the inflatable capsule;
[0029] Figure 10 It is a schematic diagram of inserting the precast pipe pile body into the inner casing;
[0030] Figure 11 It is a schematic diagram of pouring concrete between the precast pipe pile body and the inner casing;
[0031] Figure 12 It is a schematic diagram of designing a strengthening structure inside the precast pipe pile body.
[0032] Reference numerals:
[0033] 1 - Existing underground reinforced concrete structure, 2 - Cavity, 10 - Outer casing, 11 - Concrete, 20 - Inner casing, 30 - Precast pipe pile body, 40 - Sealing structure, 41 - Inflatable capsule, 42 - Steel ring, 43 - Air inlet pipe, 50 - Strengthening structure, 60 - Fixed sleeve. Specific embodiments
[0034] To make the above objects, features and advantages of the present utility model more obvious and understandable, the following will describe in detail the specific embodiments of the present utility model with reference to the accompanying drawings. Many specific details are set forth in the following description to facilitate a thorough understanding of the present utility model. However, the present utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed below.
[0035] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation.
[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this utility model belongs. The terms used herein in the description of the present utility model are only for the purpose of describing specific embodiments and are not intended to limit the present utility model.
[0037] Please refer to Figure 1 , a precast pipe pile structure passing through an existing underground reinforced concrete structure in one embodiment, including an outer casing 10, an inner casing 20 and a precast pipe pile body 30.
[0038] The outer casing 10 is inserted into the soil body, and the outer casing 10 is inserted until it contacts the existing underground reinforced concrete structure 1. Among them, the outer casing 10 is used to stabilize the surrounding soil body and prevent the collapse of the hole, which affects the adjacent pile foundation. In one embodiment, a rotary drilling rig with the same diameter as the outer casing 10 or a slightly smaller diameter can be used to drill a pilot hole. After the pilot hole is completed, an excavator vibratory hammer is used to insert the outer casing 10 to the top of the existing underground reinforced concrete structure 1.
[0039] The inner casing 20 is inserted into the outer casing 10, and the inner casing 20 passes downward through the existing underground reinforced concrete structure 1. The gap between the outer casing 10 and the inner casing 20 is filled with concrete 11. Among them, filling concrete 11 between the outer casing 10 and the inner casing 20 can, on the one hand, fix the inner casing 20, and on the other hand, seal the bottom opening of the outer casing 10 to prevent the soil body outside the outer casing 10 from subsiding. And the inner casing 20 directly passes through the existing underground reinforced concrete structure 1, which can improve the shear strength of the precast pile and create a driving space for the precast pile at the same time. When the inner casing 20 is installed in the outer casing 10, its top end can be positioned and fixed by a fixing sleeve 60.
[0040] In one embodiment, the existing underground reinforced concrete structure 1 is provided with a hole for the inner casing 20 to pass through, and the inner casing 20 passes through the existing underground reinforced concrete structure 1 through the hole. The diameter of the hole is about 100 mm larger than the inner casing 20, which can ensure that the outer casing 10 is smoothly installed in place. The inner casing 20 passes through the existing underground reinforced concrete structure 1 by a preset distance, which is not less than 30 cm, to prevent leakage when the gap-filling concrete 11 is subsequently poured.
[0041] The prefabricated pipe pile body 30 is inserted into the inner casing 20. The length of the prefabricated pipe pile body 30 can be greater than or equal to the length of the inner casing 20. Concrete 11 is filled between the prefabricated pipe pile body 30 and the inner casing 20. The concrete 11 between the inner casing 20 and the prefabricated pipe pile body 30 can stably support the prefabricated pipe pile body 30. It is strictly forbidden to pull out the inner casing 20 to prevent the secondary gap filling concrete 11 from flowing into the existing underground reinforced concrete structure 1. The inner casing 20 is subsequently the same as the outer casing 10, as a part of the pile body to resist the horizontal shear force together.
[0042] Please also read Figure 2 In one embodiment, in order to prevent the gap between the inner casing 20 and the existing underground steel-concrete structure 11 from leaking when pouring concrete 11 between the outer casing 10 and the inner casing 20, the prefabricated pipe pile structure passing through the existing underground reinforced concrete structure also includes a sealing structure 40, which is arranged between the outer casing 10 and the inner casing 20, and the sealing structure 40 is attached to the top of the existing underground reinforced concrete structure 1, and the sealing structure 40 is used to seal the gap between the inner casing 20 and the existing underground reinforced concrete structure 1.
[0043] In one embodiment, the sealing structure 40 includes an inflatable capsule 41, which is slightly smaller than the gap between the outer casing 10 and the inner casing 20. The inflatable capsule 41 is filled between the outer casing 10 and the inner casing 20, and the inflatable capsule 41 seals the gap between the inner casing 20 and the existing underground reinforced concrete structure 1.
[0044] Furthermore, the sealing structure 40 further includes a steel ring 42, the inner diameter of which is slightly larger than the outer diameter of the inner casing 20, and the outer diameter of which is slightly smaller than the inner diameter of the outer casing 10. The steel ring 42 is sleeved on the outer casing 10, and the steel ring 42 is located between the outer casing 10 and the inner casing 20. The steel ring 42 can facilitate the installation of the inflatable capsule 41 on the top of the existing underground reinforced concrete structure 1. The air inlet pipe 43 of the inflatable capsule 41 extends to the ground through the reserved hole on the steel ring 42, so as to facilitate the inflation and grouting of the inflatable capsule 41 on the ground.
[0045] In one embodiment, before pouring concrete 11 between the outer casing 10 and the inner casing 20, the inflatable capsule 41 is inflated through the air inlet pipe 43. The inflation fullness is detected according to the pressure gauge, and the gap between the inner casing 20 and the existing underground reinforced concrete structure 1 is sealed by the inflatable capsule 41 and the steel ring 42. Then, concrete 11 is poured between the outer casing 10 and the inner casing 20. After the first pouring of the gap concrete 11 is completed, high-strength cement mortar is injected into the inflatable capsule 41 through the air inlet pipe 43 by the secondary grouting method. During the injection of the cement mortar, the gas in the inflatable capsule 41 can be discharged, and finally the top parts of the outer casing 10, the inner casing 20 and the existing underground reinforced concrete 11 are connected as a whole. The inner casing 20 is strictly prohibited from being pulled out and, as part of the precast pile body, jointly resists the horizontal shear force of the pile foundation.
[0046] In one embodiment, the existing underground reinforced concrete structure 1 has a cavity 2. For the part of the precast pipe pile body 30 located in the cavity 2, there is no soil support around the pile. In order to further improve the shear resistance of the pile body, a strengthening structure 50 is provided in the precast pipe pile body 30. The strengthening structure 50 strengthens the part of the precast pipe pile body 30 located in the cavity 2 and the part passing through the existing underground reinforced concrete structure 1. Specifically, the strengthening structure 50 includes a steel reinforcement cage and concrete 11 filled and compacted by pouring. The steel reinforcement cage is placed at the bottom inside the precast pipe pile body 30, and then concrete 11 is poured and filled compactly.
[0047] In one embodiment, the outer casing 10, the inner casing 20 and the precast pipe pile body 30 are coaxially arranged and concentric, which can ensure the uniform strength of the entire precast pipe pile structure. In one embodiment, the outer casing 10 and the inner casing 20 are steel casings, which are used to ensure the strength of the entire precast pipe pile structure.
[0048] The construction process of the above precast pipe pile structure passing through the existing underground reinforced concrete structure is specifically as follows:
[0049] Please refer to Figure 3 , and a rotary drilling rig with the same diameter as or slightly smaller than the outer casing 10 is used to drill a pilot hole. After the pilot hole is completed, an excavator vibratory hammer is used to drive the outer outer casing 10 to the top of the existing underground reinforced concrete structure 1.
[0050] A rotary drilling bit about 10 cm smaller in inner diameter than the outer casing 10 is used to ream and drill in the outer casing 10 to clean the soil in the outer casing 10. Then, a rotary drilling alloy bit (diameter D - 100) is replaced, and the rotary drilling alloy bit of the rotary drilling rig is adjusted according to the designed pile position to align with the center position of the pile foundation.
[0051] Please refer to Figure 4, After the alloy drill bit is accurately positioned, drilling is carried out inside the outer casing 10, successively drilling through the top and bottom plates of the existing underground steel-concrete structure 11. At this time, through the retaining wall effect of the outer casing 10, it is ensured that the soil around the adjacent piles will not collapse due to the drilling through of the top and bottom plates of the concrete structure 11, resulting in the collapse of the soil around the already constructed piles. After the installation of the outer casing 10 is completed, it shall not be pulled out.
[0052] Please refer to Figure 5 , Insert the inner casing 20 through the hole of the existing underground reinforced concrete structure 1 inside the outer casing 10. The outer diameter of the inner casing 20 should be approximately 100 mm smaller than the diameter of the hole of the existing underground reinforced concrete structure 1 to ensure that the inner casing 20 can be smoothly installed in place. The inner casing 20 should enter the soil under the existing underground reinforced concrete structure 1 by no less than 30 cm to prevent slurry leakage during the subsequent pouring of the gap-filling concrete 11.
[0053] Please refer to Figure 6 , Manufacture an inflatable capsule 41 with a diameter slightly smaller than the gap between the outer casing 10 and the inner casing 20, cut a steel ring 42 with an inner diameter slightly larger than the outer diameter of the inner casing 20 and an outer diameter slightly smaller than the inner diameter of the outer casing 10, bind the steel ring 42 and the inflatable capsule 41 with easily breakable binding wires, and extend the air inlet pipe 43 of the inflatable capsule 41 to the ground through the reserved hole on the steel ring 42. Slip the steel ring 42 and the inflatable capsule from the top of the inner casing 20 until reaching the top position of the existing underground reinforced concrete structure 1.
[0054] Please refer to Figure 7 , Inflate the inflatable capsule 41 on the ground, detect the inflation fullness according to the pressure gauge, and seal the gap between the inner casing 20 and the existing underground reinforced concrete structure 1 through the inflatable capsule 41 and the steel ring 42.
[0055] Please refer to Figure 8 and Figure 9 , Fill the gap between the outer casing 10 and the inner casing 20 with fine aggregate concrete 11. During the process of pouring the concrete 11, after the first pouring of the gap-filling concrete 11 is completed, inject high-strength cement mortar through the air inlet pipe 43 by the secondary grouting method, and finally connect the top of the outer casing 10, the inner casing 20 and the existing underground reinforced concrete structure 1 as a whole. The outer casing 10 is strictly prohibited from being pulled out and serves as a part of the precast pile body to jointly resist the horizontal shear force of the pile foundation.
[0056] Please refer to Figure 10, after the gap-filling concrete 11 between the outer casing 10 and the inner casing 20 reaches a certain strength, the precast pipe pile body 30 is hoisted into the inner casing 20. After positioning and connecting the piles, it is hammered to the designed pile position according to the normal process. The gap between the precast pipe pile body 30 and the inner casing 20 is filled tightly with fine aggregate concrete 11. After the pouring of the gap-filling concrete 11 is completed, the inner casing 20 is strictly prohibited from being pulled out to prevent the secondary gap-filling concrete 11 from flowing into the cavity 2 of the concrete 11. Subsequently, the inner casing 20, like the outer casing 10, serves as part of the pile body to jointly resist the horizontal shear force.
[0057] Please refer to Figure 12 , for the part of the pipe pile body located in the cavity 2, there is no soil support around the pile. To further improve the shear resistance of the pile body, a steel reinforcement cage is installed in the pipe pile body in the cavity 2 and below the cavity 2, and the cavity is filled tightly with concrete 11.
[0058] For the above-mentioned precast pipe pile structure passing through the existing underground reinforced concrete structure, the inner casing 20 directly passes through the existing underground reinforced concrete structure 1, providing construction conditions for the precast pipe pile. There is no need for large-scale excavation and removal of the culvert, which can improve the construction efficiency, reduce the construction cost, reduce the damage to the current terrain, and has relatively high construction environmental protection.
[0059] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the various embodiments of the present invention, and they should all be covered within the scope of the claims and the description of the present invention.
Claims
1. A precast pipe pile structure passing through an existing underground reinforced concrete structure, characterized in that, Comprising: An outer casing, driven into the soil body and in contact with the existing underground reinforced concrete structure after being driven; An inner casing, passing through the outer casing, the inner casing passing downward through the existing underground reinforced concrete structure, and the gap between the outer casing and the inner casing being filled with concrete; A precast pipe pile body, passing through the inner casing, and the gap between the precast pipe pile body and the inner casing being filled with concrete.
2. The precast pipe pile structure passing through the existing underground reinforced concrete structure according to claim 1, characterized in that, It further includes a sealing structure, the sealing structure being arranged between the outer casing and the inner casing, and the sealing structure being used to seal the gap between the inner casing and the existing underground reinforced concrete structure.
3. The precast pipe pile structure passing through the existing underground reinforced concrete structure according to claim 2, wherein, The sealing structure includes an inflatable capsule, the inflatable capsule being filled between the outer casing and the inner casing, and the inflatable capsule sealing the gap between the inner casing and the existing underground reinforced concrete structure.
4. The precast pipe pile structure passing through an existing underground reinforced concrete structure according to claim 3, wherein, The sealing structure further includes a steel ring, the steel ring being sleeved on the inner casing between the outer casing and the inner casing, and the air inlet pipe of the inflatable capsule extending to the ground through a reserved hole on the steel ring.
5. The precast pipe pile structure passing through the existing underground reinforced concrete structure according to claim 4, characterized in that, Cement mortar is injected into the inflatable capsule through the air inlet pipe.
6. The precast pipe pile structure passing through an existing underground reinforced concrete structure according to claim 1, characterized in that, The inner casing penetrates the existing underground reinforced concrete structure by a preset distance, and the preset distance is not less than 30 cm.
7. The precast pipe pile structure passing through the existing underground reinforced concrete structure according to claim 1, characterized in that, The existing underground reinforced concrete structure is provided with a hole for the inner casing to pass through, and the diameter of the hole is 100 mm larger than the inner casing.
8. The precast pipe pile structure passing through an existing underground reinforced concrete structure according to claim 1, wherein, The existing underground reinforced concrete structure has a cavity, and a strengthening structure is provided in the precast pipe pile body, and the strengthening structure strengthens the part of the precast pipe pile body located in the cavity and passing through the existing underground reinforced concrete structure.
9. The precast pipe pile structure passing through an existing underground reinforced concrete structure according to claim 8, wherein, The strengthening structure includes a steel reinforcement cage and concrete filled and compacted by pouring.
10. The precast pipe pile structure passing through the existing underground reinforced concrete structure according to claim 1, characterized in that, The outer casing, the inner casing and the precast pipe pile body are coaxially arranged.