Construction method for concrete prefabricated pipe pile core grouting
By using sand and gravel bag sealing technology and optimizing vibration process in the construction of concrete prefabricated pipe pile core, the problems of concrete erosion and bottom sealing are solved, and material saving, process simplification and construction efficiency are improved.
Patent Information
- Application Number
- CN202510664105.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-22
- Publication Date
- 2025-06-24
AI Technical Summary
There are problems of concrete erosion and difficulty in bottom sealing in the existing concrete prefabricated pipe pile core filling process, resulting in large material consumption, high cost and increased construction complexity, and insufficient combination effect between concrete and the inner wall of the pile core.
Using sand and gravel bag sealing technology, by spanning the fixed rod and wire rope on the top of the pipe pile, the aging-resistant braided bag containing sand and gravel is lowered to the pile core position to form a sealing layer, and the penetration and combination of cement slurry and sand and gravel bags are promoted through the optimization of vibration process.
It effectively solves the problems of concrete erosion and difficulty in bottom sealing, reduces material costs and construction complexity, enhances the bonding effect between the core filling body and the inner wall of the pipe pile, and improves construction efficiency and economy.
Smart Images
Figure CN120193525A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of building construction, and specifically to a construction method for core filling of precast concrete pipe piles. Background Art
[0002] In recent years, precast concrete pipe piles have been widely used in various building projects due to their high construction efficiency, strong single-pile bearing capacity, good quality stability, etc. Especially in engineering scenarios with soft soil foundations and high load requirements, precast pipe piles, through their factory production mode and standardized construction process, have significantly improved the construction quality and efficiency of foundation projects. With the continuous improvement of the requirements for green construction and cost control in the construction industry, new demands have been put forward for the optimization and improvement of precast pipe pile construction technology.
[0003] In the prior art, there are still several problems to be improved in the core filling process of precast pipe piles. Traditional core filling methods usually require a large amount of concrete to fill the pile core to ensure the connection strength. This method not only consumes a large amount of materials but may also affect the core filling quality due to the loss of bottom concrete. Some projects use steel plates to seal the bottom of the pile, which can prevent the loss of concrete but increases the material cost and construction complexity. In addition, there may be room for improvement in the bonding effect between the concrete and the inner wall of the pile core in the conventional core filling process. These problems have restricted the full play of the technical advantages of precast pipe piles to a certain extent. In response to these technical difficulties, the industry is exploring more economical and efficient core filling solutions. Summary of the Invention
[0004] The present invention aims to solve the above problems, and thus provides a construction method for core filling of precast concrete pipe piles that ensures the core filling quality.
[0005] The technical solution adopted by the present invention to solve the above problems is as follows: A construction method for core filling of precast concrete pipe piles, comprising the following steps: S1: Clean the sundries and accumulated water in the core of the precast concrete pipe pile.
[0006] S2: Prepare an anti-aging woven bag filled with sand and gravel as a sand and gravel bag.
[0007] S3: A fixing rod is spanned across the top of the pipe pile, and a steel wire rope connected to the sand and gravel bag is wound around the middle of the fixing rod. The sand and gravel bag is lowered to the position of the pile core, and the spatial position and unfolding form of the sand and gravel bag are adjusted to make it fit the side wall of the pile core to form a sealing layer.
[0008] S4: Use concrete to pour the pile core.
[0009] S5: Use a vibrator to vibrate the poured concrete until it is dense.
[0010] S6: Control the downward penetration of cement slurry during vibration and combine it with the sand and gravel in the sand and gravel bag.
[0011] S7: After the concrete pouring is completed, promptly cover and cure the core-filled part.
[0012] S8: Wait until the concrete strength meets the standard and then accept the quality of the core filling.
[0013] The present invention adopting the above technical solution, compared with the prior art, its prominent features are: Through the sand and gravel bag plugging technology, the problems of concrete loss and difficult bottom plugging in the traditional core filling process are effectively solved. Compared with the traditional steel plate plugging method, the material cost and construction complexity are significantly reduced; by using the synergistic effect of the fixed rod and the sand and gravel bag, the tight fit between the plugging layer and the inner wall of the pile core can be adjusted, and the construction inconvenience that may be caused by the conventional plugging method is avoided; by optimizing the vibration process to promote the penetration and combination of the cement slurry and the sand and gravel bag, the bonding effect between the core filling body and the inner wall of the pipe pile is enhanced, overcoming the defect of insufficient interfacial bonding strength in the traditional core filling process; this method realizes the saving of construction materials and the simplification of the process while ensuring the compactness of the core filling, and is particularly suitable for engineering projects with high requirements for construction efficiency and economy.
[0014] As a preference, a further technical solution of the present invention is: Further, the slump requirement of the concrete is greater than 180mm, which can ensure that the concrete has good fluidity and filling property, is beneficial to fully fill the pile core space during the core filling process, and is also convenient for the cement slurry to penetrate into the sand and gravel bag.
[0015] Further, the sand and gravel in the sand and gravel bag are filled in layers according to the particle size. The particle size of the upper layer is 5 - 10mm, the middle layer is 3 - 5mm, and the lower layer is 1 - 3mm, forming a graded filter layer. By adopting the layered grading filling method, the larger particle size sand and gravel in the upper layer can initially filter the concrete aggregate, the middle layer of medium particle size sand and gravel forms a transition layer, and the lower layer of fine particle size sand and gravel is beneficial to fully combine with the cement slurry, forming a stable filtering and combination system.
[0016] Further, the vibrator is an insertion type and the vibration depth needs to penetrate the concrete layer and disturb the surface sand and gravel of the sand and gravel bag, which can not only ensure the compactness of the concrete but also promote the effective combination of the cement slurry and the sand and gravel, improving the interfacial bonding strength.
[0017] Further, the fixed rod adopts an adjustable length double-headed screw structure, with card slots matching the top of the pipe pile at both ends and a wire rope reel in the middle. It is fixed by matching the card slots at both ends with the top of the pipe pile, and the wire rope is wound and released by the reel in the middle, realizing the precise adjustment and stable fixation of the position of the sand and gravel bag.
[0018] Furthermore, the length of the steel wire rope is the same as the lowering depth of the sand and gravel bag, ensuring that the sand and gravel bag can accurately reach the predetermined position and avoiding positioning deviation caused by improper length.
[0019] Furthermore, the aging-resistant woven bag of the sand and gravel bag is made of polyethylene material, and the surface is provided with uniformly distributed slurry-permeating holes with a pore diameter of 2 - 5 mm and a hole pitch of 10 - 15 mm. The polyethylene material woven bag has the property of aging resistance, and the uniformly distributed slurry-permeating holes on the surface not only ensure the penetration effect of the cement slurry but also maintain the structural integrity of the sand and gravel bag, forming a stable penetration and bonding system. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 It is a schematic structural diagram of an embodiment of the present invention; The markings in the figure are: pipe pile 1, sand and gravel bag 2, fixing rod 3, steel wire rope 4. SPECIFIC EMBODIMENTS
[0021] The following further illustrates the present invention in conjunction with embodiments, and the purpose is only to better understand the content of the present invention. Therefore, the examples given do not limit the protection scope of the present invention.
[0022] A construction method for core filling of precast concrete pipe piles includes the following steps: S1: Clean the sundries and accumulated water in the core of the precast concrete pipe pile 1.
[0023] S2: Prepare an aging-resistant woven bag filled with sand and gravel as the sand and gravel bag 2.
[0024] S3: A fixing rod 3 is spanned across the top of the pipe pile 1, and a steel wire rope 4 connected to the sand and gravel bag 2 is wound around the middle of the fixing rod 3. The sand and gravel bag 2 is lowered to the core position, and the spatial position and unfolding form of the sand and gravel bag 2 are adjusted to make it fit the side wall of the core to form a sealing layer.
[0025] S4: Pour the core with concrete.
[0026] S5: Use a vibrator to vibrate the poured concrete until it is dense.
[0027] S6: Control the downward penetration of the cement slurry during vibration to combine with the sand and gravel in the sand and gravel bag 2.
[0028] S7: After the concrete pouring is completed, promptly cover and cure the core filling part.
[0029] S8: Accept the core filling quality after curing until the concrete strength meets the standard.
[0030] Furthermore, the slump requirement of the concrete is greater than 180 mm, which can ensure that the concrete has good fluidity and filling property, is beneficial to fully fill the core space during the core filling process, and is also convenient for the cement slurry to penetrate into the sand and gravel bag 2.
[0031] Further, the sand and gravel in the sand and gravel bag 2 is filled in layers according to the particle size. The particle size of the upper layer is 5-10 mm, the middle layer is 3-5 mm, and the lower layer is 1-3 mm, forming a graded filter layer. Adopting the layered grading filling method, the larger particle size sand and gravel in the upper layer can initially filter the concrete aggregate, the middle layer with medium particle size sand and gravel forms a transition layer, and the lower layer with fine particle size sand and gravel is conducive to the full combination with the cement slurry, forming a stable filtering and combination system.
[0032] Further, the vibrator is an insertion type and the vibration depth needs to penetrate the concrete layer and disturb the sand and gravel on the surface of the sand and gravel bag 2, which can not only ensure the compactness of the concrete, but also promote the effective combination of the cement slurry and the sand and gravel, and improve the interfacial bonding strength.
[0033] Further, the fixing rod 3 adopts a double-headed screw structure with adjustable length, with clamping grooves matching the top of the pipe pile 1 at both ends and a wire rope 4 reel in the middle. It is fixed by matching the clamping grooves at both ends with the top of the pipe pile 1, and the reel in the middle controls the winding and unwinding of the wire rope 4, realizing the precise adjustment and stable fixation of the position of the sand and gravel bag 2.
[0034] Further, the length of the wire rope 4 is the same as the lowering depth of the sand and gravel bag 2, ensuring that the sand and gravel bag 2 can accurately reach the predetermined position and avoiding positioning deviation caused by improper length.
[0035] Further, the anti-aging woven bag of the sand and gravel bag 2 is made of polyethylene material, and its surface is provided with uniformly distributed slurry permeation holes with a pore diameter of 2-5 mm and a hole pitch of 10-15 mm. The polyethylene material woven bag has anti-aging characteristics, and the uniformly distributed slurry permeation holes on the surface not only ensure the penetration effect of the cement slurry, but also maintain the structural integrity of the sand and gravel bag 2, forming a stable penetration and combination system.
[0036] The problem of concrete loss and difficult bottom plugging in the traditional core filling process is effectively solved by the sand and gravel bag 2 plugging technology, and the material cost and construction complexity are significantly reduced compared with the traditional steel plate plugging method; by using the synergistic effect of the fixing rod 3 and the sand and gravel bag 2, the tight fit between the plugging layer and the inner wall of the pile core can be adjusted, and the construction inconvenience that may be caused by the conventional plugging method is avoided; by optimizing the vibration process to promote the penetration and combination of the cement slurry and the sand and gravel bag 2, the bonding effect between the core filling body and the inner wall of the pipe pile 1 is enhanced, overcoming the defect of insufficient interfacial bonding strength in the traditional core filling process; while ensuring the compactness of the core filling, this method realizes the saving of construction materials and the simplification of the process, and is particularly suitable for engineering projects with high requirements for construction efficiency and economy.
[0037] The above are only the preferred and feasible embodiments of the present invention, and do not limit the scope of the rights of the present invention. Any equivalent changes made by using the content of the specification and drawings of the present invention are included in the scope of the rights of the present invention.
Claims
1. A construction method for core filling of precast concrete pipe piles, characterized in that: It includes the following steps: S1: Clean the sundries and accumulated water in the core of the precast concrete pipe pile; S2: Prepare an anti-aging woven bag filled with sand and gravel as the sand and gravel bag; S3: A fixing rod is spanned on the top of the pipe pile, and a steel wire rope connected to the sand and gravel bag is wound in the middle of the fixing rod. Lower the sand and gravel bag to the core position, adjust the spatial position and unfolding form of the sand and gravel bag to make it fit the side wall of the core to form a sealing layer; S4: Pour the core with concrete; S5: Use a vibrator to vibrate the poured concrete until it is dense; S6: Control the downward penetration of the cement slurry during vibration to combine with the sand and gravel in the sand and gravel bag; S7: After the concrete pouring is completed, promptly cover and cure the core filling part; S8: Wait until the concrete strength reaches the standard and then accept the core filling quality.
2. The construction method of the core filling of the precast concrete pipe pile according to claim 1, characterized in that: The slump requirement of the concrete is greater than 180mm.
3. The construction method of core filling for precast concrete pipe piles according to claim 1, characterized in that: The sand and gravel in the sand and gravel bag are filled in layers according to the particle size. The upper layer has a particle size of 5-10mm, the middle layer is 3-5mm, and the lower layer is 1-3mm, forming a graded filter layer.
4. The construction method of core filling for precast concrete pipe piles according to claim 1, characterized in that: The vibrator is an insertion type and the vibration depth needs to penetrate the concrete layer and disturb the sand and gravel on the surface of the sand and gravel bag.
5. The construction method of core filling for precast concrete pipe piles according to claim 1, characterized in that: The fixing rod adopts a double-headed screw structure with adjustable length, with card slots matching the top of the pipe pile at both ends and a steel wire rope reel in the middle.
6. The construction method of the core filling of the precast concrete pipe pile according to claim 1, characterized in that: The length of the steel wire rope is the same as the lowering depth of the sand and gravel bag.
7. The construction method of core filling for precast concrete pipe piles according to claim 1, characterized in that: The anti-aging woven bag of the sand and gravel bag is made of polyethylene material, and its surface is provided with uniformly distributed slurry-permeable holes with a pore diameter of 2-5mm and a hole pitch of 10-15mm.