CN218757417U - Prestressed concrete sheet pile and supporting and retaining structure assembled by prestressed concrete sheet pile - Google Patents

Abstract

The utility model provides a prestressed concrete sheet pile and an assembled supporting and retaining structure thereof, the prestressed concrete sheet pile comprises a pile body and a reinforcement cage, and the reinforcement cage is arranged in the pile body; the cross section of the pile body is square inside and outside, a pair of edges are respectively provided with a through-long arc groove, and the reinforcement cage comprises a longitudinal main reinforcement, a reinforcing rib and a stirrup; the strengthening rib is all established to the pile bolck end and the bottom of pile body, and the stirrup includes first stirrup and second stirrup, and first stirrup encircles on vertical main muscle, and the second stirrup is around the strengthening rib setting, and its both ends are connected with vertical main muscle respectively. The supporting and retaining structure comprises prestressed concrete sheet piles, geomembrane bags or grouting are implanted between the adjacent prestressed concrete sheet piles, embedded parts do not need to be arranged in the prestressed concrete sheet piles, the production efficiency of prefabricated parts cannot be influenced, the operation is feasible, the adaptability is strong, and the anti-seepage and water-stopping effects after construction are excellent.

Description

Prestressed concrete sheet pile and supporting and retaining structure assembled by prestressed concrete sheet pile

Technical Field

The utility model belongs to a fender, envelope field relate to a prestressed concrete sheet pile and a fender structure of assembling thereof.

Background

The supporting and retaining structure is widely applied to the fields of water conservancy, municipal administration, highways and the like, takes certain measures for reinforcing and protecting side slopes, and has the important functions of resisting lateral pressure, preventing water and soil loss and maintaining the stability of shorelines. Traditional retaining structures such as masonry retaining walls and cast-in-place cantilever retaining walls have the disadvantages of large wet workload, heavy environmental pollution, large material consumption and long construction period, and the requirements of high-quality engineering development cannot be gradually met. The prestressed concrete sheet pile has the advantages of high pile body bearing capacity, stable quality, high construction speed, low comprehensive cost, environmental protection on site and the like, and is widely applied to various engineering fields in recent years. At present, the prestressed concrete sheet piles commonly used in the retaining comprise I-shaped piles, U-shaped sheet piles, mixed reinforcement pipe piles and the like, and due to the assembly characteristics of the prestressed concrete sheet piles, the transverse tight connection between the piles is always the main point of construction quality control in the project implementation process. The prestressed concrete sheet pile generally adopts a close-packed arrangement form to form a retaining row pile, and connection, seepage prevention and water stopping are completed through occlusion of tenons and tongues on two sides or grouting in a groove formed by grooves. In addition, there are also a number of ways to splice sheet piles using plastic, rubber and metal connectors. In the foundation pit engineering, a prestressed concrete sheet pile is inserted into a cement-soil mixing pile or a mixing wall to form a composite retaining structure which can both retain soil and stop water. At present, the precast concrete sheet pile product and the connection method have the following problems in practical application:

problem 1: the I-shaped pile and the U-shaped sheet pile belong to special-shaped section piles, the wall thickness is small, the width is large, the section rigidity is large, the bearing capacity is high, but the cage ribs are difficult to realize mechanical production, and can be formed only by adopting a pouring mode, the manufacturing efficiency is low, the cost is high, meanwhile, the special section of the pile sinking machine is low in adaptation degree with the pile sinking machine, and the configured special fixture is easy to cause the damage of a pile head.

Problem 2: the mixed reinforcement tubular pile is a high-ductility prestressed tubular pile additionally provided with non-prestressed reinforcements, the pile body of the mixed reinforcement tubular pile is reasonable in structure, large in rigidity, high in bearing capacity and good in ductility, but the pile body of the mixed reinforcement tubular pile is not provided with grooves and tongues, certain gaps exist among the piles after pile sinking, anti-leakage measures need to be arranged after the piles, and the soil-retaining width of a single pile is smaller than that of other special-shaped piles.

Problem 3: the prestressed concrete sheet pile adopts a driving method or a vibration method for pile sinking, and due to the soil squeezing effect, human factors and the like, the pile body positioning and the verticality are not easy to control, and the dislocation between adjacent piles occurs at times. If a connecting mode of engaging the tongue and the groove is adopted, the ideal effect of tightly fitting the tongue and groove is difficult to achieve.

Problem 4: the strength and the permeability of the cement-soil mixing pile are greatly influenced by factors such as project site engineering geology, worker operation level and the like, the quality problem is easy to occur due to improper control, the overall stability and the water stopping effect of the structure are damaged, the construction cost of the continuous cement-soil mixing wall is high, and the saving of construction cost is not facilitated.

Problem 5: the Chinese patent publication No. CN204825925U discloses a centrifugal square pile enclosure structure with a groove tenon, and discloses a centrifugal square pile with concave-convex tenon grooves and tongues on two sides, namely, a through long tenon ear part is arranged on one side, a through long mortise ear part is arranged on the other side, and the tenon ear part and the mortise structure on the mortise ear part can be completely meshed after horizontal splicing, so that the construction and installation are convenient, the joint between the two piles is uniform and fine, and the soil retaining effect is excellent. However, the tenon-and-mortise structures of the tenon-and-mortise parts and the mortise-and-mortise parts are all long, and once pile sinking perpendicularity has an error, pile sinking difficulty and damage to the pile body at the tenon-and-mortise structure are easily caused.

Problem 6: the Chinese patent publication No. CN206070519U, entitled "A PREFABRICATED PRESTRESSED THICK-WEB I-SHAPED HOLLOW SUPPORT PILE", discloses an I-SHAPED HOLLOW SUPPORT PILE with trapezoids indent on both sides, and its THICK-WEB HOLLOW STRUCTURE, so that the structural reinforcement cage is convenient for mechanized production and can be produced by centrifugal process. However, the problem of weakness at the four corners is also caused, and the four corners of the pile top may be damaged when the pile is erected by using the jig and the pile is driven.

Problem 7: the chinese utility model patent publication No. CN211898319U discloses a water stopping structure between two concrete piles, which discloses a water stopping structure between two concrete piles, the concrete pile body has two splicing surfaces, a water stopping film bag and a pre-buried pipe are pre-buried respectively, the water stopping film bag is inserted into the pre-buried pipe through a rabbet between the piles during construction, and a filler is filled in the water stopping film bag to form a water stopping surface between the two splicing surfaces. The connection mode can deal with the condition that adjacent piles are greatly staggered in the construction process, and an anti-seepage or water-stopping structure can be conveniently arranged between the two concrete piles. But more embedded parts are arranged in the structure, so that the production and construction difficulty is improved. When the water stop film belt and the grouting guide pipe are placed into the pre-buried pipe for pile sinking and driving, if the water stop film belt and the pre-buried pipe are deviated, the water stop effect is influenced.

Problem 8: the invention discloses a concrete pile with embedded pipe fittings arranged on two sides, and a continuous seepage-proofing water-stopping wall spliced by the concrete pile, and discloses a concrete pile with embedded pipe fittings on two sides, wherein splicing surfaces of pile bodies of two circular pipe fittings are exposed to form an arc-shaped connecting part, after pile sinking is finished, an I-shaped metal sheet or a rigid plastic plate with a cutting edge on the lower part is inserted into the splicing surfaces, and concrete is poured into the circular pipe to finish connection to form a water-stopping structure. However, the plastic pipe is embedded in the pile body of the structure, and when the precast pile is produced centrifugally and maintained by high-pressure steam, the plastic pipe is easy to deform. The I-shaped inserting plate is thin and is easy to damage in the construction process, and the pipe fitting is punctured along the lateral direction of the pile body to reach the designed elevation with certain difficulty.

SUMMERY OF THE UTILITY MODEL

To the technical problem, the utility model provides a prestressed concrete sheet pile, this prestressed concrete sheet pile is rational in infrastructure, rigidity is big, the facade is pleasing to the eye, the production preparation is high-efficient, the construction is reliable outward, the utility model also provides one a retaining structure that prestressed concrete sheet pile assembled implants the geomembrane bag between the adjacent prestressed concrete sheet pile of this retaining structure, and the operation is feasible, and the cost is reasonable, and strong adaptability prevents seepage stagnant water effect after the worker is excellent.

The utility model provides a technical scheme that its technical problem adopted is:

a prestressed concrete sheet pile comprises a pile body and a reinforcement cage, wherein the reinforcement cage is arranged in the pile body; the cross section of the pile body is square inside and outside, a pair of edges are respectively provided with a through-long arc groove, and the reinforcement cage comprises a longitudinal main reinforcement, a reinforcing rib and a stirrup; the reinforcing rib is all established to the stake top and the bottom of pile body, and the stirrup includes first stirrup and second stirrup, and first stirrup encircles on vertical main muscle, and the second stirrup is around the reinforcing rib setting, and its both ends are connected with vertical main muscle respectively.

In the above scheme, the longitudinal main reinforcement comprises prestressed reinforcement and non-prestressed reinforcement; the prestressed reinforcement is arranged in the pile body, the non-prestressed reinforcement is arranged in the other opposite side, and the first stirrup surrounds the prestressed reinforcement and the non-prestressed reinforcement to form a square. The prestressed reinforcement and the non-prestressed reinforcement are mixed to be configured, so that the bearing capacity of the pile body can be improved, the displacement ductility of the pile body can be improved, and the seismic performance of the pile body is enhanced.

Furthermore, reinforcing ribs are additionally arranged at four corners of the pile end of the pile body, the second stirrups at each corner are arranged around the reinforcing ribs, one end of each second stirrup is connected with the prestressed steel bars, and the other end of each second stirrup is connected with the non-prestressed steel bars to form a triangle. The reinforcing ribs are additionally arranged at the end corners of the pile, so that the strength of the upper part of the pile body is reliable in the pile sinking process.

In the scheme, the lower section of the arc groove on one side of the pile body is provided with the arc tenon, and the arc tenon can be used as positioning guide to assist pile sinking positioning, so that the assembly precision of the supporting and retaining structure is further improved, and the reliability of node connection is improved.

Furthermore, reinforcing ribs are additionally arranged at the corners of the top end of the pile body, the second stirrups at each corner are arranged around the reinforcing ribs, one end of each second stirrup is connected with the prestressed reinforcement, and the other end of each second stirrup is connected with the non-prestressed reinforcement to form a triangle; the reinforcing ribs are arranged at the arc tenons at the bottom ends of the piles, the two ends of the second stirrups are respectively connected with the prestressed reinforcements of the longitudinal main reinforcements to form a trapezoid, and the reinforcing ribs are arranged at the pile end corners and the arc tenons at the bottom ends of the piles, so that the vertical strength of the piles is reliable in the pile sinking process.

In the above scheme, the prestressed reinforcement is a prestressed steel bar or a prestressed strand.

In the scheme, the arc length of the arc groove is 1/2-3/4 of the width of the edge where the arc groove is located, the area of the arc groove adopted by the pile body is large, and the problem that grouting cannot be performed due to undersize of the tenon and the mortise when the support pile inclines outside the arrangement plane of the pile body is solved.

An assembled supporting and retaining structure comprises the prestressed concrete sheet pile.

According to the scheme, the geomembrane bag is implanted or grouting is performed between the adjacent prestressed concrete sheet piles, an embedded part is not required to be arranged in the prestressed concrete sheet piles, the production efficiency of prefabricated parts is not influenced, the operation is feasible, the adaptability is strong, and the anti-seepage water-stopping effect after construction is excellent.

Furthermore, the geomembrane bag is a long strip-shaped bag-shaped object with an opening at one end and a closed end, the height of the geomembrane bag is less than or equal to the length of the arc groove and cannot be higher than the pile end, and a plurality of support ribs matched with the cross section shape are arranged at the middle part of the geomembrane bag; the bottom of the geomembrane bag is provided with a balancing weight.

Compared with the prior art, the beneficial effects of the utility model are that:

prestressed concrete sheet pile, the circular arc recess area that the pile body adopted is great, has solved the problem that can't be in milk that a fender pile unsmooth undersize leads to when the plane tilt out-tilt is arranged at the pile body. The pile body is provided with the tenon and the mortise, so that pile sinking positioning can be assisted, the assembly precision of the precast pile retaining structure is improved, and the reliable connection of the nodes is ensured. Reinforcing ribs are additionally arranged at the pile top of the pile body, and reinforcing ribs are additionally arranged at the position, located at the arc tenon, of the pile bottom of the pile body; the first stirrup surrounds the longitudinal main reinforcement, and the second stirrup surrounds the reinforcing rib and is connected with the longitudinal main reinforcement. The pile sinking method ensures that the pile top and the pile bottom have reliable strength in the pile sinking process. Prestressed concrete sheet pile is rational in infrastructure, rigidity is big, the facade is pleasing to the eye, the production preparation is high-efficient, the construction is reliable, retaining structure that prestressed concrete sheet pile assembled implants the geomembrane bag between adjacent prestressed concrete sheet pile, need not set up the built-in fitting in prestressed concrete sheet pile, can not influence the efficiency of prefabricated component production, and the operation is feasible, and the cost is reasonable, strong adaptability, and the prevention of seepage stagnant water effect is excellent behind the worker.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic perspective view of a prestressed concrete sheet pile having circular arc grooves on both sides;

fig. 2 is a schematic view of a three-dimensional structure of a prestressed concrete sheet pile according to an embodiment of the present invention, in which a circular arc tenon is provided at a lower segment of one side of the prestressed concrete sheet pile;

FIG. 3 is a schematic cross-sectional view taken at I in FIG. 2;

FIG. 4 is a schematic cross-sectional view taken at II in FIG. 2;

fig. 5 is a schematic layout view of a reinforcement cage according to an embodiment of the present invention;

FIG. 6 isbase:Sub>A schematic cross-sectional view A-A of FIG. 5;

FIG. 7 is a schematic cross-sectional view B-B of FIG. 5;

fig. 8 is a schematic structural view of a geomembrane bag according to an embodiment of the present invention;

fig. 9 is a schematic view of an embodiment of the present invention implanting geomembrane bags in the grooves formed by the grooves;

fig. 10 is a schematic view illustrating that micro-expansive mortar or fine stone concrete is poured into the geomembrane bag according to an embodiment of the present invention;

FIG. 11 is a schematic top view of a retaining structure formed after maintenance according to an embodiment of the present invention;

fig. 12 is a schematic bottom view of a retaining structure formed after maintenance according to an embodiment of the present invention.

In the figure: 1. a pile body; 2. an arc groove; 3. arc tenon; 4. pre-stressing the steel bars; 5. non-prestressed reinforcement; 6. reinforcing ribs; 7. a first stirrup; 8. a second stirrup; 9. supporting the rib material; 10. a geomembrane bag; 11. a balancing weight; 12. and (5) hooping.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "front", "rear", "left", "right", "up", "down", "axial", "radial", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience of description and to simplify the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Example 1

As shown in fig. 1, be an embodiment of the prestressed concrete sheet pile, including pile body 1 and steel reinforcement cage, the steel reinforcement cage sets up in pile body 1.

The cross section of the pile body 1 is inner circle and outer square, a pair of edges are respectively provided with the arc grooves 2, the pile body is provided with the tenon and the mortise, pile sinking positioning can be assisted, the assembly precision of the supporting and blocking structure is improved, and reliable connection of nodes is guaranteed. The convex-concave tenon is arc-shaped, and can better bear extrusion force in different directions of the convex-concave tenon generated under other unexpected conditions such as inclination of a pile body than the fold-line-shaped convex-concave tenon in the pile sinking process, so that the angle of the convex-concave tenon is not easy to damage.

The reinforcement cage comprises a longitudinal main reinforcement, a reinforcing rib 6 and a stirrup 12; strengthening rib 6 is all established to pile body 1's pile top and bottom, and stirrup 12 includes first stirrup 7 and second stirrup 8, and first stirrup 7 is around on vertical main reinforcement, and second stirrup 8 is around strengthening rib 6 setting, and its both ends are connected with vertical main reinforcement respectively.

According to the present embodiment, preferably, the longitudinal main reinforcement comprises prestressed reinforcement 4 and non-prestressed reinforcement 5; the prestressed reinforcement 4 is arranged in the pile body 1, the non-prestressed reinforcement 5 is arranged in the other opposite side, and the first stirrup 7 surrounds the prestressed reinforcement 4 and the non-prestressed reinforcement 5 to form a square shape. By adopting the mixed configuration of the prestressed reinforcement 4 and the non-prestressed reinforcement 5, the bearing capacity of the pile body can be improved, the displacement ductility of the pile body can be improved, and the seismic performance of the pile body can be enhanced.

According to the embodiment, preferably, the arc length of the arc-shaped groove 2 is 1/2-3/4 of the width of the edge where the arc-shaped groove is located, the area of the arc-shaped groove 2 adopted by the pile body 1 is large, and the problem that grouting cannot be performed due to the fact that the tenon is too small when the supporting pile inclines outside the arrangement plane of the pile body is solved.

According to the present embodiment, preferably, reinforcing ribs 6 are additionally arranged at the pile end corners of the pile body 1, the second stirrups 8 at each corner are arranged around the reinforcing ribs 6, one end of each second stirrup is connected with the prestressed reinforcement 4, and the other end of each second stirrup is connected with the non-prestressed reinforcement 5 to form a triangle. The reinforcing ribs 6 are additionally arranged at the end corners of the pile, so that the strength of the upper part of the pile body is reliable in the pile sinking process.

Example 2

As shown in fig. 2 to 7, a prestressed concrete sheet pile, which is different from embodiment 1 in that a pair of edges of a pile body 1 of the prestressed concrete sheet pile are respectively provided with an arc groove 2, wherein a lower section of the arc groove 2 on one side is an arc tenon 3, and the other side is a through long arc groove 2, and the arc tenon 3 can be used as a positioning guide to assist pile sinking positioning, thereby further improving the assembly precision of a retaining structure and improving the reliability of node connection.

As shown in fig. 5, the reinforcement cage comprises a longitudinal main reinforcement, a reinforcing rib 6 and a stirrup 12; the pile top of the pile body 1 is additionally provided with a reinforcing rib 6, and the pile bottom of the pile body 1 is additionally provided with the reinforcing rib 6 at the arc tenon 3; the stirrup 12 comprises a first stirrup 7 and a second stirrup 8, the first stirrup 7 surrounds the longitudinal main reinforcement, and the second stirrup 8 surrounds the reinforcing rib 6 and is connected with the longitudinal main reinforcement.

According to the present embodiment, preferably, the longitudinal main reinforcement comprises prestressed reinforcement 4 and non-prestressed reinforcement 5; the prestressed reinforcement 4 is arranged in the pile body 1, the non-prestressed reinforcement 5 is arranged in the other opposite side, and the first stirrup 7 surrounds the prestressed reinforcement 4 and the non-prestressed reinforcement 5 to form a square shape. By adopting the mixed configuration of the prestressed reinforcement 4 and the non-prestressed reinforcement 5, the bearing capacity of the pile body can be improved, the displacement ductility of the pile body can be improved, and the seismic performance of the pile body can be enhanced.

As shown in fig. 6, according to this embodiment, it is preferable that a reinforcing rib 6 is additionally provided at a corner of the pile top of the pile body 1, the second stirrup 8 at each corner surrounds the reinforcing rib 6, and one end of the second stirrup is connected to the prestressed reinforcement 4, and the other end of the second stirrup is connected to the non-prestressed reinforcement 5 to form a triangle. The reinforcing ribs 6 are additionally arranged at the top corners of the pile, so that the strength of the upper part of the pile body is reliable in the pile sinking process.

As shown in fig. 7, according to this embodiment, reinforcing ribs 6 are additionally provided at the corners of the pile top of the pile body 1, the second stirrup 8 at each corner is arranged around the reinforcing rib 6, and one end of the second stirrup is connected with the prestressed reinforcement 4, and the other end of the second stirrup is connected with the non-prestressed reinforcement 5 to form a triangle; reinforcing ribs 6 are arranged at the arc tenons 3 at the bottom ends of the piles of the pile body 1, and two ends of the second stirrups 8 are connected with the prestressed reinforcements 4 of the longitudinal main reinforcements respectively to form a trapezoid. The reinforcing ribs 6 are arranged at the pile end angle and the circular arc tenon 3 at the bottom end of the pile, so that the strength of the upper part and the lower part of the pile body is improved, and the reliable strength of the upper part and the lower part of the pile body is ensured in the pile sinking process.

Example 3

A prestressed concrete sheet pile, which is different from embodiment 1 or 2 in that the prestressed reinforcement 4 is a prestressed steel bar.

Example 4

A prestressed concrete sheet pile, which is different from embodiment 1 or 2 in that the prestressed reinforcement 4 is a prestressed strand.

Example 5

As shown in fig. 8 to 12, a fabricated retaining structure comprising prestressed concrete sheet piles according to any one of embodiments 1, 2, 3 or 4, wherein geomembrane bags 10 are inserted between adjacent prestressed concrete sheet piles.

According to this embodiment, preferably, geomembrane bag 10 is the rectangular shape bag form thing of one end opening one end confined, and the height less than or equal to circular arc recess 2's of geomembrane bag 10 length and can not be higher than the pile tip of geomembrane bag 10, and geomembrane bag 10 cross sectional form is circular or similar with the cross sectional form of pending recess, and geomembrane bag 10 mid portion is provided with the brace rod material 9 of multichannel and cross sectional shape adaptation, and the bottom of geomembrane bag 10 is provided with balancing weight 11, and is preferred, balancing weight 11 is the concrete balancing weight to supplementary geomembrane bag 10 overcomes the influence of ground water level or remaining mud liquid, reaches the design depth requirement. Preferably, the material of the geomembrane bag 10 should have high strength and suitable extensibility. The geomembrane bag 10 has certain ductility, the filled micro-expansion cement mortar or fine stone concrete is tightly connected with the original prestressed concrete sheet pile after curing and solidification, and the seepage-proofing and water-stopping effects are good. The geomembrane bag 10 has a restraint effect on fillers, and the phenomenon of slurry leakage caused by immediate water construction or direct grouting when the pile body has large deviation is not needed to be worried about.

A fender structure that prestressed concrete sheet pile was assembled implements route:

and vertically driving the prestressed concrete sheet piles into a foundation, and densely arranging to form a continuous soil retaining structure. The circular arc tenon 3 on one side of the part below the mud surface can be used as positioning guide, after pile sinking is in place, holes are cleaned on the upper grooves of adjacent piles, hole cleaning operation is carried out on the grooves by adopting high-pressure water flushing equipment, soil digging processing speed is high, hole cleaning effect is good, then the prefabricated geomembrane bags 10 are implanted into the grooves, after the bottom of the geomembrane bags 10 reaches a leading hole elevation, prepared micro-expansion cement mortar or fine stone concrete is poured into the geomembrane bags 10 by utilizing grouting pipes, and a continuous supporting structure with good water stopping effect can be formed after maintenance is completed. When being applied to conventional dado pile, can begin the construction from the side that faces water, geomembrane bag 10 and filler after the completion possess the stagnant water effect, the recess of road side can be directly slip casting after the clear hole and handle.

The fender structure of assembling need not set up the built-in fitting in prestressed concrete sheet pile, can not influence the efficiency of prefabricated component production. The groove seepage-proofing and water-stopping connecting part formed by the geomembrane bag 10 is of a plain concrete structure, has no steel member and has better durability; and no plastic connecting piece is arranged, so that the connecting piece is not damaged due to improper operation in the construction process. Compare in continuous cement soil stirring wall stagnant water curtain, the utility model discloses the function of fender and stagnant water can be compromise equally to the recess prevention of seepage stagnant water connecting portion that form, and the quality is controllable, and the processing object has more the pertinence, and it is lower to synthesize the cost.

The above detailed description is only for the purpose of illustrating the practical embodiments of the present invention, and they are not intended to limit the scope of the present invention, and all equivalent embodiments or modifications that do not depart from the technical spirit of the present invention are intended to be included within the scope of the present invention.

Claims (10)

1. The prestressed concrete sheet pile is characterized by comprising a pile body (1) and a reinforcement cage, wherein the reinforcement cage is arranged in the pile body (1);

the cross section of the pile body (1) is square inside and outside, a pair of edges are respectively provided with a through-long arc groove (2), and the reinforcement cage comprises a longitudinal main reinforcement, a reinforcing rib (6) and a stirrup (12); strengthening rib (6) are all established to the pile top end and the bottom of pile body (1), and stirrup (12) include first stirrup (7) and second stirrup (8), and first stirrup (7) encircle on vertical main muscle, and second stirrup (8) set up around strengthening rib (6), and its both ends are connected with vertical main muscle respectively.

2. Prestressed concrete sheet pile according to claim 1, characterized in that said longitudinal main reinforcements comprise prestressed reinforcements (4) and non-prestressed reinforcements (5);

prestressing steel (4) arrange in pile body (1), and non-prestressing steel (5) arrange in another opposite side, and first stirrup (7) encircle and form squarely on prestressing steel (4) and non-prestressing steel (5).

3. The prestressed concrete sheet pile of claim 2, wherein reinforcing ribs (6) are added to four corners of the pile end of the pile body (1), the second stirrups (8) at each corner are arranged around the reinforcing ribs (6), one end of each second stirrup is connected with the prestressed reinforcement (4), and the other end of each second stirrup is connected with the non-prestressed reinforcement (5) to form a triangle.

4. The prestressed concrete sheet pile according to claim 2, wherein the lower section of the circular arc groove (2) on one side of the pile body (1) is provided with a circular arc tenon (3).

5. The prestressed concrete sheet pile according to claim 4, wherein the pile head corners of the pile body (1) are additionally provided with reinforcing ribs (6), the second stirrups (8) at each corner are arranged around the reinforcing ribs (6), one end of each second stirrup is connected with the prestressed reinforcement (4), and the other end of each second stirrup is connected with the non-prestressed reinforcement (5) to form a triangle; the pile bottom end circular arc tenon (3) of the pile body (1) is provided with a reinforcing rib (6), and two ends of the second stirrup (8) are respectively connected with the prestressed reinforcement (4) of the longitudinal main reinforcement to form a trapezoid.

6. Prestressed concrete sheet pile according to claim 2, characterized in that the prestressed reinforcement (4) is a prestressed steel bar or a prestressed strand.

7. Prestressed concrete sheet pile according to claim 1, characterized in that the arc length of the circular arc groove (2) is 1/2-3/4 of the width of the edge on which it is located.

8. A fabricated retaining structure, comprising the prestressed concrete sheet pile of any one of claims 1 to 7.

9. Prestressed concrete sheet pile according to claim 8, characterized in that a geomembrane sack (10) or grout is inserted between adjacent prestressed concrete sheet piles.

10. The prestressed concrete sheet pile according to claim 9, wherein the geomembrane bag (10) is a long strip-shaped bag with one open end and one closed end, the height of the geomembrane bag (10) is less than or equal to the length of the circular arc groove (2) and cannot be higher than the pile end, and a plurality of support ribs (9) matched with the cross-sectional shape are arranged in the middle part of the geomembrane bag (10); the bottom of the geomembrane bag (10) is provided with a balancing weight (11).

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