Suspended prestressed pipe pile structure
By using open-type pile heads and grouting technology in prestressed concrete pipe piles, the problem of reduced pile head resistance was solved, enabling smooth pile construction and high-quality pile foundation construction.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-28
- Publication Date
- 2026-04-10
AI Technical Summary
In building construction, the influence of groundwater and sediment during the construction of conventional prestressed pipe pile foundations can weaken the resistance of the pile head, causing the pipe pile foundation to sink and posing a risk of building accidents.
An open-type pile head structure is adopted, with the inner part of the pile head connected to the hollow part of the pile body. The conical opening design, combined with grouting, forms a cement solid body, which enhances the end resistance of the pile body.
It effectively protects the inner wall of the pile, reduces construction damage, improves the quality and bearing capacity of the pile foundation, ensures that the pile reaches the bottom of the borehole smoothly, enhances the pile head resistance, and prevents sinking.
Smart Images
Figure CN224106398U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of building engineering construction, specifically relates to a kind of suspension prestressed pipe pile structure. BACKGROUND
[0002] When prestressed pipe pile foundation is constructed in building engineering, due to the existence of hard interlayer or bearing layer in geology, the static pressure or hammering construction method of conventional prestressed pipe pile foundation is difficult to pass through, in order to ensure that pipe pile foundation has certain effective embedding length, drilling machine is generally needed to drill hole at the position of pipe pile first, the diameter of drilling hole is generally 50-100mm smaller than the diameter of pipe pile, after the construction of drilling hole is completed, pipe pile is hoisted into the hole position which has been constructed, and then static pressure or hammering construction is carried out.
[0003] When drilling machine is used to drill hole at the position of pipe pile first, due to the influence of underground water, soft soil and sand on the side wall of hole inevitably fall into the bottom of hole, and it is difficult to clean the bottom sediment and sand soil when the construction of hole is completed; Especially, the diameter of drilling hole is generally 50-100mm smaller than the diameter of pipe pile, and in the subsequent construction process of pipe pile, soft soil and sand on the side wall of hole inevitably fall into the bottom of hole, which increases the risk of sediment and sand soil accumulation in the bottom of hole.
[0004] In addition, during the construction of pipe pile, the general pile head adopts closed pile head to improve the end resistance of pile head. Due to the drilling hole construction technology of drilling machine at the position of pipe pile, underground water inevitably accumulates in the drilling hole, so in the subsequent construction process of pipe pile, underground water has strong supporting effect on pipe pile, and the greater the underground water supporting force encountered by pipe pile is when pipe pile enters deeper into hole.
[0005] In view of the above factors, when drilling machine is used to drill hole at the position of pipe pile first and then pipe pile foundation is constructed, pipe pile head often cannot reach the bottom of drilling hole, that is, pipe pile is suspended above the bottom of drilling hole, and pipe pile head is supported by hole sediment, sand soil and underground water, with the passage of time, when underground water gradually weakens due to seasonal influence and sediment and sand soil gradually sink and consolidate, the end resistance of pipe pile foundation gradually disappears, and pipe pile foundation still sinks under the action of building force, thereby causing building engineering accident, therefore, the inventor provides a kind of suspension prestressed pipe pile structure which is simple and ingenious in structure and can increase the end resistance of pipe pile foundation to ensure its long-term stability. UTILITY MODEL CONTENTS
[0006] The utility model discloses a simple and ingenious structure can increase the pipe pile end resistance and ensure its long-term stable suspension prestressed pipe pile structure, to solve the prior art when groundwater gradually weakens under the influence of season, sediment and sand gradually sink consolidation, the end resistance of pipe pile foundation gradually disappears, and the pipe pile foundation still sinks under the building force, thereby causing the technical problem of building engineering accident.
[0007] The utility model discloses a simple and ingenious structure can increase the pipe pile end resistance and ensure its long-term stable suspension prestressed pipe pile structure, to solve the prior art when groundwater gradually weakens under the influence of season, sediment and sand gradually sink consolidation, the end resistance of pipe pile foundation gradually disappears, and the pipe pile foundation still sinks under the building force, thereby causing the technical problem of building engineering accident.
[0008] A suspension prestressed pipe pile structure, it includes the pile body and the open type pile head, open type pile head is fixed at the lower end portion of pile body, open type pile head includes pile head butt joint portion, pile head inner joint portion and pile head opening portion, and the inner circle surface of pile head opening portion is conical structure and the opening of this conical structure gradually reduces from down to up along the vertical direction.
[0009] As the further optimization or improvement of the scheme.
[0010] The open type pile head is circular hollow integrated structure and is welded and fixed at the lower end portion of the pile body.
[0011] As the further optimization or improvement of the scheme.
[0012] The lower end portion of the pile head butt joint portion contacts with the pile body.
[0013] As the further optimization or improvement of the scheme.
[0014] The inner wall of the hollow portion of the pile body contacts with the pile head inner joint portion.
[0015] As the further optimization or improvement of the scheme.
[0016] The inner circle surface of the pile head inner joint portion is provided with the convex portion.
[0017] As the further optimization or improvement of the scheme.
[0018] The convex portion is the inner tooth of sawtooth shape.
[0019] The utility model discloses a simple and ingenious structure can increase the pipe pile end resistance and ensure its long-term stable suspension prestressed pipe pile structure, to solve the prior art when groundwater gradually weakens under the influence of season, sediment and sand gradually sink consolidation, the end resistance of pipe pile foundation gradually disappears, and the pipe pile foundation still sinks under the building force, thereby causing the technical problem of building engineering accident.
[0020] 1, the hollow portion of the pile body can directly enter groundwater during the downward construction process, balances the resistance influence of the powerful water buoyancy of the closed pipe pile, makes the pile body more easily downward construction reaches the drilling hole bottom, to ensure the pile foundation construction quality.
[0021] 2、By setting the structure of the open pile head, the inner wall of the pile body can be better protected by the pile head inner part, and the drilling sediment and sand soil will not directly rub and impact the inner wall of the pile body during the downward construction of the pile body, thereby effectively protecting the pile body and effectively reducing the damage phenomenon of the pile body during the downward construction process.
[0022] 3、Suppose that the open pile head does not finally enter the drilling hole bottom, that is, the suspended pile condition occurs, by setting the structure of the open pile head, the grouting pipe is inserted into the vicinity of the drilling hole bottom from the hollow part of the pile body for grouting construction, the hole bottom sediment and sand soil are formed into a high-strength cement mass body by the cement slurry, so as to improve the resistance of the end part of the pile body and improve the construction quality of the pipe pile foundation.
[0023] 4、The open pile head and the cement mass body can be closely combined, the frictional engagement force of the inner wall of the pile body, the open pile head and the cement mass body is effectively enhanced, and the bearing capacity of the pipe pile structure is further improved. BRIEF DESCRIPTION OF DRAWINGS
[0024] The utility model will be further described in combination with the drawings.
[0025] Figure 1 It is a structural schematic view of prior art.
[0026] Figure 2 It is a structural schematic view of the utility model.
[0027] Figure 3 It is a structural schematic view of the grouting state of the utility model.
[0028] Figure 4 It is a cooperation view of the pile body and the open pile head.
[0029] Figure 5 It is a plan view of the pile head.
[0030] Indicated as in the drawing:
[0031] 10, pile body;11, hollow part;12, closed pile head;13, open pile head;13a, pile head butt joint part;13b, pile head inner part;13c, pile head opening part;13d, inner tooth;20, drilling hole;21, drilling hole bottom;22, hole filler;30, grouting pipe;40, cement mass body. DETAILED DESCRIPTION
[0032] The technical scheme in the embodiments of the utility model will be clearly and completely described in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.
[0033] Referring to Figure 1 , first of all, the prior art is described, the pipe pile includes a pile body 10 and a closed pile head 12, the closed pile head 12 is welded and fixed with the lower end of the pile body 10, when the pipe pile foundation is built, a drill is used to drill a hole at the position of the pipe pile to form a drilled hole 20, due to the influence of underground water, the soft soil and sand on the hole wall will inevitably fall into the bottom of the hole, when the hole construction is completed, the bottom sediment and sand are difficult to clean, and thus a hole filling 22 is formed, the hole filling 22 is accumulated at the bottom of the drilled hole 21, so that the pile body 10 cannot reach the bottom of the drilled hole 21.
[0034] Referring to Figures 2-5 , a suspended prestressed pipe pile structure includes a pile body 10 and an open pile head 13, the open pile head 13 is a circular hollow integrated structure and is welded and fixed at the lower end of the pile body 10, the open pile head 13 includes a pile head butt joint part 13a, a pile head inscribed part 13b and a pile head opening part 13c, the pile head butt joint part 13a is in contact with the lower end of the pile body 10, the pile head inscribed part 13b is inserted into the hollow part 11 of the pile body 10 and is in contact with the inner wall of the pile body 10, the pile head opening part 13c is formed by downward extension from the joint of the pile head butt joint part 13a and the pile head inscribed part 13b, and the inner circular surface of the pile head opening part 13c is a tapered structure and the opening of the tapered structure gradually reduces from bottom to top along the vertical direction.
[0035] The specific implementation principle of the utility model in the building construction is that according to the geological conditions, a drill is used to drill a hole at the position of the pipe pile, the open pile head 13 is inserted into the hole formed by drilling, the pile body 10 is subjected to static pressure or hammering construction, then a grouting pipe 30 is inserted into the vicinity of the bottom of the drilled hole 21 from the hollow part 11 of the pile body 10 to perform grouting construction, and a cement unification body 40 is formed, wherein the cement unification body 40 is formed by the hole filling 22 and grouting coagulation, and the construction is completed after grouting is completed.
[0036] The utility model has the advantages that compared with the prior art: during the downward construction of the pile body 10, underground water can directly enter the hollow part 11 of the pile body 10, the resistance influence of the strong water buoyancy inside and outside the closed pipe pile is balanced, so that the pile body 10 is more easily constructed downward to the bottom of the drilled hole 21, to ensure the pile foundation construction quality.
[0037] Further, by arranging the structure of the open pile head 13, the pile head inscribed part 13b can better protect the inner wall of the pile body 10, so that the sediment and sand in the drilled hole do not directly rub and impact the inner wall of the pile body 10 during the downward construction of the pile body 10, thereby effectively protecting the pile body 10 and effectively reducing the damage phenomenon of the pile body 10 during the downward construction.
[0038] In addition, assuming that the open pile head 13 does not finally enter the drilled hole bottom 21, i.e. a suspended pile condition occurs, by setting the structure of the open pile head 13, grouting pipe 30 is inserted into the vicinity of the drilled hole bottom 21 from the hollow part 11 of the pile body 10 to perform grouting construction, the hole bottom sediment, sand is formed into a high-strength cement unitive body 40 by cement slurry, so as to improve the resistance of the end of the pile body 10 and improve the construction quality of the pipe pile foundation.
[0039] Referring to Figure 4 As an optimized embodiment of the utility model, the inner circular surface of the pile head inner joint part 13b is provided with a convex part, which is a sawtooth-shaped inner tooth 13d. The significance of this solution is that the open pile head 13 and the cement unitive body 40 can be tightly combined, effectively enhancing the frictional engagement force of the inner wall of the pile body 10, the open pile head 13 and the cement unitive body, and further improving the bearing capacity of the pipe pile structure.
[0040] The basic principle, main features and advantages of the utility model are shown and described above. It should be understood by those skilled in the art that the utility model is not limited by the above embodiments, and the above embodiments and descriptions in the specification are only to illustrate the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model can have various changes and improvements, and these changes and improvements all fall within the scope of the utility model claimed.
Claims
1. A suspended prestressed pipe pile structure, characterized by: It includes a pile body (10) and an open pile head (13), the open pile head (13) is fixed at the lower end of the pile body (10), the open pile head (13) includes a pile head butt joint (13a), a pile head inner joint (13b) and a pile head opening part (13c), the pile head opening part (13c) is formed by the connection of the pile head butt joint (13a) and the pile head inner joint (13b) extending downward, the inner circular surface of the pile head opening part (13c) is a tapered structure and the opening of the tapered structure gradually reduces from bottom to top along the vertical direction.
2. The suspended prestressed pipe pile structure according to claim 1, characterized in that: The open pile head (13) is a circular hollow integral structure and is welded and fixed at the lower end of the pile body (10).
3. The suspended prestressed pipe pile structure according to claim 1, characterized in that: The pile head butt joint (13a) is in contact with the lower end of the pile body (10).
4. The suspended prestressed pipe pile structure according to claim 1, characterized in that: The pile head inner joint (13b) is inserted into the hollow part (11) of the pile body (10) and is in contact with the inner wall of the pile body (10).
5. The suspended prestressed pipe pile structure according to claim 1, characterized in that: The inner circular surface of the pile head inner joint (13b) is provided with a protruding part.
6. The suspended prestressed pipe pile structure according to claim 5, characterized in that: The protruding part is a sawtooth-shaped inner tooth (13d).