CN209975507U - Upper-section drainage and lower-section non-drainage combined prefabricated pipe pile - Google Patents
Upper-section drainage and lower-section non-drainage combined prefabricated pipe pile Download PDFInfo
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- CN209975507U CN209975507U CN201920225148.3U CN201920225148U CN209975507U CN 209975507 U CN209975507 U CN 209975507U CN 201920225148 U CN201920225148 U CN 201920225148U CN 209975507 U CN209975507 U CN 209975507U
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Abstract
The utility model discloses a combined precast tubular pile of upper segment drainage under water festival not drainage. The prefabricated pipe pile is divided into an upper section and a lower section, and the side wall of the prefabricated pipe pile of the upper section is provided with holes which are distributed in an array; the side wall of the lower section of the prefabricated pipe pile is not provided with a hole; sleeving the prefabricated pipe piles with geotextiles respectively, implanting a lower section of the prefabricated pipe pile into a designed depth, implanting an upper section of the prefabricated pipe pile above a non-perforated pipe pile, and connecting the upper section of the prefabricated pipe pile and the non-perforated pipe pile by a pile connecting method; water in soil around the pile permeates into the inner pipe from the upper prefabricated pipe pile through the geotextile from the opening of the upper prefabricated pipe pile and then is drained; after drainage and consolidation, the geotextile is punctured, and soil around the pile enters the inner pipe through the opening of the prefabricated pipe pile; and (5) continuously pouring soil around the pile into the inner pipe from the top of the prefabricated pipe pile, and backfilling a broken stone cushion layer and a grid after leveling. The utility model discloses not only have saving material of trompil tubular pile, bear the weight of the dynamic height, handle weak soil foundation advantage such as time spent short, can also effectively solve and can make the problem of pile body strength loss reinforcing the trompil tubular pile overlength in the great area of the reinforcement degree of depth.
Description
Technical Field
The utility model belongs to a tubular pile, in particular to civil engineering construction technical field's a combined precast tubular pile of upper segment drainage under water festival is not arranged water.
Background
With the improvement of comprehensive national strength and economic strength of China, China has rapidly developed in the aspect of infrastructure construction, particularly, east coastal areas are developed economically and attractive, and large quantities of enterprises are attracted, but because land resources are limited and most of the soft soil is poor in properties, how to economically and effectively treat soft soil foundations becomes a problem that designers cannot bypass, and particularly, coastal industrial gathering areas which are commonly existing in weak soil environments such as Bohai Bay economic zones, Yangtze river delta and Zhujiang delta are typical representatives. The conventional flexible pile composite foundation is low in pile body strength and limited in reinforcement depth although the manufacturing cost is low; the rigid pile has high pile body strength, large reinforcing depth and high cost. The newly developed cast-in-place concrete large-diameter tubular pile (PCC pile) combines the advantages of the two piles, but has the defects of slurry pollution in the construction process, low construction efficiency and the like. Although the single use of the perforated tubular pile can solve most of the problems, the pile body strength is insufficient due to the overlong length of the perforated pile, and the overlong perforated pile is used in a soft soil area with deep reinforcement depth to face the condition of pile body strength loss.
Therefore, the development of the tubular pile which has the advantages of the perforated prefabricated tubular pile and does not reduce the strength of the pile body is of great significance.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem in the background art, the utility model provides a can compromise the trompil stake and accelerate advantages such as drainage and promotion frictional resistance and use not to reduce pile body intensity as the precast tubular pile of prerequisite to can realize effectively improving pile foundation bearing capacity and efficiency of construction's purpose.
The technical scheme of the utility model as follows:
the utility model comprises two prefabricated tubular piles, namely an upper prefabricated tubular pile and a lower prefabricated tubular pile, which are connected with each other up and down through a pile splicing mode; the upper section of the prefabricated pipe pile is circumferentially arrayed with openings along the axial direction and the peripheral surface of the pile wall, namely the openings are regularly arranged along the transverse direction and the longitudinal direction of the surface of the pile body; the peripheral surface of the lower section of the prefabricated pipe pile wall is not provided with holes; geotextiles for improving the bearing capacity of the prefabricated pipe piles are sleeved on the peripheral surfaces of the two sections of prefabricated pipe piles, and small holes are formed after the geotextiles corresponding to the openings of the upper section of prefabricated pipe piles are punctured; the two sections of prefabricated tubular piles are filled with soil around the piles, and consolidation drainage and bearing capacity improvement are performed through combination of the holes and the geotextiles.
The openings satisfy the following relationships: the distance h between two axially adjacent holes of the upper prefabricated pipe pile is more than or equal to 5 phi, the number n of the holes on the peripheral surface of the pile wall in the radial direction is less than or equal to 6, the outer diameter D of the prefabricated pipe pile is more than or equal to 10 phi, and phi represents the hole diameter of the holes.
The upper prefabricated tubular pile and the lower prefabricated tubular pile are made of concrete.
The length of the prefabricated tubular pile is changed according to the design.
The geotextile adopts non-woven geotextile.
The combination of the holes and the geotextile is used for consolidation drainage and improving the bearing capacity of the prefabricated pipe pile.
The existing pile foundation in the composite foundation treated by the soft soil foundation is mainly friction pile, and the single pile bearing capacity is mainly pile side friction resistance. Therefore, to increase the bearing capacity of the pile, the surface area of the foundation pile must be increased as much as possible. For areas with shallow reinforcement depth, the requirement can be met by using the perforated pile alone, but for unfavorable geological areas with deep reinforcement depth, the perforated pile with large scale may face the problem of insufficient pile body strength. And the utility model provides a multi-functional precast tubular pile of drainage for soft clay is handled can effectively solve this problem, the utility model discloses a trompil stake is used on this kind of precast tubular pile upper portion, can effectively accelerate the drainage consolidation of weak soil, handles bad ground layer to there is not trompil stake in the sub-unit connection, greatly improved pile body bulk strength. And the reinforcing influence depth of the general open-pore tubular pile is about 15m, so that the construction can not generate adverse influence on the consolidation of the soft soil at the upper part.
The utility model has the advantages that:
(1) the design of the upper prefabricated pipe pile body hole accelerates the drainage consolidation of soil around the pile, and saves the construction period; in the implantation process, soft soil around the pile is extruded, pore water can enter the inner pipe from the hole in the side surface of the precast tubular pile to achieve the effect of consolidation and drainage, the geotextile is punctured by the steel wire hook after drainage and consolidation are finished, soil around the pile enters the precast tubular pile through the hole from the periphery, and the side friction resistance of the pile is increased.
(2) The utility model discloses a lower section of precast tubular pile does not trompil and has effectively improved the problem of trompil pile body strength loss, connects two sections of precast tubular piles through the mode of pile extension and has effectively solved and can make the problem of pile body strength loss reinforcing the great regional trompil tubular pile overlength of degree of depth.
(3) The utility model discloses simple structure, the fast cycle of construction speed are short, can reach high-efficient, quick result in the engineering of speedily carrying out rescue work, and noiselessness and mud pollution when the construction, and are little to the ground disturbance.
(4) The utility model discloses owing to use the trompil tubular pile, so compare with the whole non-trompil tubular piles that use, practiced thrift the concrete, effectively saved the engineering expense.
Drawings
Fig. 1 is the structure schematic diagram of the precast tubular pile of the utility model.
Fig. 2 is a schematic structural diagram of geotextile on the upper prefabricated pipe pile sleeve.
Fig. 3 is a schematic diagram after the upper prefabricated pipe pile is implanted.
Fig. 4 is a schematic diagram of the lower prefabricated pipe pile after being implanted and connected with the upper prefabricated pipe pile.
Fig. 5 is a schematic diagram of the drainage process after the precast tubular pile is implanted.
Fig. 6 is a schematic view showing a process in which soil around a pile enters a precast pile to increase frictional resistance.
Fig. 7 is a schematic view of the structure after backfilling the gravel cushion and the grating.
Fig. 8 is a structural schematic diagram of geotextile on the lower prefabricated pipe pile sleeve.
In the figure: 0. the pile comprises a pipe pile structure, 1 upper prefabricated pipe pile, 2 lower prefabricated pipe pile, 3 holes, 4 geotextile, 5 vacuum pumps, 6 cement sealing covers, 7 vacuum pipes, 8 pile connecting parts, 9 pile surrounding soil, 10 broken stone cushion layers and grids.
Detailed Description
The present invention will be further explained with reference to the drawings and examples.
As shown in fig. 1, the pipe pile structure 0 of the present invention includes two prefabricated pipe piles, which are an upper prefabricated pipe pile 1 and a lower prefabricated pipe pile 2, and the upper prefabricated pipe pile 1 and the lower prefabricated pipe pile 2 are connected to each other up and down in the middle to form a pile splicing part 8; the upper section of the prefabricated tubular pile 1 is circumferentially arrayed with the open holes 3 along the axial direction and the peripheral surface of the pile wall, namely the open holes 3 are regularly arranged along the transverse direction and the longitudinal direction of the surface of the pile body; the peripheral surface of the pile wall of the lower section of the prefabricated pipe pile 2 is not provided with holes; geotextiles 4 for improving the bearing capacity of the prefabricated pipe piles are sleeved on the peripheral surfaces of the two sections of prefabricated pipe piles, and small holes are formed after the geotextiles 4 corresponding to the holes 3 of the upper section of prefabricated pipe pile 1 are punctured; the two sections of prefabricated pipe piles are filled with soil 9 around the piles.
The embodiment of the utility model is as follows:
the first step is as follows: as shown in fig. 2 and 8, geotextiles 4 are sleeved on the outer peripheral surfaces of the upper precast tubular pile 1 and the lower precast tubular pile 2.
The second step is that: as shown in fig. 3, the lower prefabricated pipe pile 2 is implanted into the designed depth.
The third step: as shown in fig. 4, the upper prefabricated tubular pile 1 is implanted to a designed depth, and the upper prefabricated tubular pile 1 and the lower prefabricated tubular pile 2 are connected by a pile extension method, so that the top end of the lower prefabricated tubular pile 2 is connected with the bottom end of the upper prefabricated tubular pile 1.
The fourth step: as shown in fig. 5, after cement sealing is performed on the top of the upper prefabricated pipe pile 1, a cement sealing cover 6 is formed on the top, a vacuum tube 7 penetrates through the cement sealing cover 6 and is inserted into the upper prefabricated pipe pile 1, a vacuum pump 5 connected with the vacuum tube 7 vacuumizes the interior of the upper prefabricated pipe pile 1, and due to the pressure difference between the inside and the outside of the hole of the upper prefabricated pipe pile 1, water in the soil around the prefabricated pipe pile 9 on the periphery of the prefabricated pipe pile penetrates into the pipe through the opening 3 on the periphery of the upper prefabricated pipe pile 1 after passing through geotextile 4, so that drainage of the soil around the prefabricated pipe pile 9 on the periphery of the prefabricated pipe pile is realized.
The fifth step: as shown in fig. 6, after the soil 9 around the peripheral pile of the precast tubular pile is drained and consolidated, the evacuation is stopped, the steel wire hook is extended from the top of the upper section of the precast tubular pile 1 to puncture the geotextile 4 at the opening 3, the soil 9 around the pile enters the pipe through the opening 3 of the upper section of the precast tubular pile 1, the friction resistance on the side of the pile is increased, the soil squeezing effect is relaxed, and the whole height of the soil 9 around the peripheral pile of the precast tubular pile is reduced.
And a sixth step: as shown in fig. 7, the cement seal cover 6 is removed, the soil 9 around the pile is poured into the pipe from the top of the upper precast tubular pile 1 to enable the surface of the soil 9 around the pile to be flush with the pipe opening of the precast tubular pile, and the gravel cushion layer and the grating 10 are backfilled on the surface of the soil body inserted into the precast tubular pile until the height of the gravel cushion layer and the grating 10 after backfilling is the same as the designed elevation.
Claims (5)
1. The utility model provides a combined precast tubular pile of upper segment row water festival not drainage, its characterized in that: the pile comprises two sections of prefabricated tubular piles, namely an upper section of prefabricated tubular pile (1) and a lower section of prefabricated tubular pile (2), wherein the upper section of prefabricated tubular pile (1) and the lower section of prefabricated tubular pile (2) are connected with each other up and down in a pile splicing mode; the upper section of the prefabricated pipe pile (1) is provided with the openings (3) in an array manner along the axial direction and the circumferential direction of the pile wall, namely the openings (3) are regularly arranged along the transverse direction and the longitudinal direction of the surface of the pile body; the peripheral surface of the pile wall of the lower section of the prefabricated pipe pile (2) is not provided with holes; geotextiles (4) for improving the side frictional resistance of the prefabricated tubular piles are sleeved on the peripheral surfaces of the two sections of prefabricated tubular piles, and small holes are formed after the geotextiles (4) corresponding to the holes (3) of the upper section of prefabricated tubular pile (1) are punctured; the two sections of prefabricated pipe piles are both filled with soil (9) around the pile.
2. The upper-section drainage and lower-section non-drainage combined precast tubular pile according to claim 1, wherein the open pores (3) satisfy the following relationship: the distance h between two axially adjacent holes (3) along the upper prefabricated pipe pile (1) is more than or equal to 5 phi, the number n of holes on the peripheral surface of the pile wall along the radial direction is less than or equal to 6, the outer diameter D of the prefabricated pipe pile is more than or equal to 10 phi, and phi represents the aperture of the holes (3).
3. The upper-section drainage and lower-section non-drainage combined precast tubular pile according to claim 1, characterized in that the upper-section precast tubular pile (1) and the lower-section precast tubular pile (2) are both made of concrete.
4. The upper-section drainage and lower-section non-drainage combined precast tubular pile according to claim 1, wherein the geotextile (4) is a non-woven geotextile.
5. The upper-section drainage and lower-section non-drainage combined precast tubular pile according to claim 1, characterized in that: consolidation drainage is carried out and the bearing capacity of the prefabricated pipe pile is improved through the combination of the open holes (3) and the geotextile (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920225148.3U CN209975507U (en) | 2019-02-22 | 2019-02-22 | Upper-section drainage and lower-section non-drainage combined prefabricated pipe pile |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920225148.3U CN209975507U (en) | 2019-02-22 | 2019-02-22 | Upper-section drainage and lower-section non-drainage combined prefabricated pipe pile |
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| CN209975507U true CN209975507U (en) | 2020-01-21 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109914392A (en) * | 2019-02-22 | 2019-06-21 | 浙江大学 | Upper section draining is lower to save not drain combination type prefabricated tubular pile and construction method |
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- 2019-02-22 CN CN201920225148.3U patent/CN209975507U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109914392A (en) * | 2019-02-22 | 2019-06-21 | 浙江大学 | Upper section draining is lower to save not drain combination type prefabricated tubular pile and construction method |
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