CN217734094U

CN217734094U - Reinforced structure of old retaining wall

Info

Publication number: CN217734094U
Application number: CN202221432601.6U
Authority: CN
Inventors: 朱成华; 何世兵; 刘文劼; 陈伟
Original assignee: Chongqing Institute Of Building Science Co ltd
Current assignee: Chongqing Institute Of Building Science Co ltd
Priority date: 2022-06-09
Filing date: 2022-06-09
Publication date: 2022-11-04
Anticipated expiration: 2032-06-09

Abstract

The utility model provides a reinforced structure of old retaining wall, which is characterized in that a hole is drilled in the soil body outside the wall back of the retaining wall, a steel pipe is inserted, a steel bar and a fixing ring are arranged in the steel pipe, a grouting hole is arranged on the surface of the steel pipe, cement paste is pressed in the steel pipe to form a steel pipe pile, and a cement paste solidification reinforcing body is formed on the soil body around the steel pipe; the steel pipe pile top and the wall back of the retaining wall are respectively provided with a wall back longitudinal connecting beam and a pile top longitudinal connecting beam; the rear longitudinal coupling beam of the retaining wall is connected with the retaining wall through the embedded bars; the steel pipe pile is connected with the pile top longitudinal coupling beam through the steel bar in the pipe; the pile top is provided with a transverse connecting beam, a rear longitudinal connecting beam of the wall and a pile top longitudinal connecting beam; and the rear longitudinal connecting beam, the pile top longitudinal connecting beam and the transverse connecting beam of the wall are cast-in-place reinforced concrete beams. The utility model discloses can promote the anti-overturning of retaining wall, anti ability of sliding, ground bearing capacity to a reinforced structure that does not account for extra space, easily construction, cost are lower again.

Description

Reinforced structure of old retaining wall

Technical Field

The utility model relates to a geotechnical engineering field particularly, relates to a reinforced structure of old retaining wall.

Background

The mountainous city has complex terrain, fluctuating terrain, obvious building characteristics, especially old districts are usually built according to the mountain, and the terrain height difference takes a retaining wall as a support. Old retaining walls are usually built earlier, most of the old retaining walls are not designed regularly, the retaining walls are basically gravity retaining walls, and the gravity retaining walls mainly rely on self weight to maintain self stability under the action of soil pressure. With the overall development of old cell reconstruction and city update work, the safety of the existing retaining wall around and in the old cell basically does not meet the requirements of the current national regulations, the reinforcing treatment of the retaining wall is very important, and the retaining wall is a difficult point for updating the city at the current stage.

In the existing design, a common old retaining wall reinforced structure has the defects of increasing the cross section, adding anti-slide piles, increasing anchoring and the like, but the structure has the defects of the old cell reconstruction project, the cross section increasing method needs to occupy a certain space, a certain cross section is increased on the outer side of the retaining wall, the old cell has poor space conditions, an extra wall front space is difficult to find, and the foundation pit excavation of a newly added partial foundation can also generate disturbance influence on the foundation of the original retaining wall; the anti-slide piles are additionally arranged, the space problem is also caused, the cost is high, and the construction risk is high due to the fact that the condition of large-scale mechanical equipment for hole forming is not provided usually and the manual hole digging construction is adopted; the problem that space still exists in the peripheral anchor head that needs to increase the anchor to this structure will be subject to the ground distribution condition behind the retaining wall, and application scope is less, and consequently, current reinforced structure all has more obvious restrictive condition in the transformation of old district, and the suitability is relatively poor.

SUMMERY OF THE UTILITY MODEL

In order to remedy the above deficiencies, the utility model provides a overcome above-mentioned technical problem or solve the reinforced structure of an old retaining wall of above-mentioned problem at least partially. The utility model discloses can promote the anti-overturning of retaining wall, anti ability of sliding, ground bearing capacity to a reinforced structure that does not account for extra space, easily construction, cost are lower again.

The utility model discloses a realize like this:

the utility model provides a reinforced structure of old retaining wall, drill in the soil body outside the retaining wall back and insert the steel pipe, be equipped with reinforcing bar and solid fixed ring in the steel pipe, the steel pipe surface is established the slip casting hole, and press the water injection mud in the steel pipe and form the steel-pipe pile, and form the grout solidification reinforcement body in the soil body around the steel pipe; the steel pipe pile top and the wall back of the retaining wall are respectively provided with a wall back longitudinal connecting beam and a pile top longitudinal connecting beam; the rear longitudinal coupling beam of the retaining wall is connected with the retaining wall through the embedded bars; the steel pipe pile is connected with the pile top longitudinal coupling beam through the steel bar in the pipe; the pile top is provided with a transverse connecting beam which is connected with the rear longitudinal connecting beam of the wall and a pile top longitudinal connecting beam.

The utility model discloses an in one embodiment, steel-pipe pile aperture scope is 100 ~ 300mm, and the hole site is not less than 1000mm apart from the horizontal distance of retaining wall back of the body, along retaining wall direction longitudinal separation distance not less than 500mm, and suitable adjustment can be made to the interval, hole interval and the hole depth of hole and retaining wall, and the hole depth imbeds retaining wall ground bearing layer.

The utility model discloses an in the embodiment, steel-pipe pile and steel pipe adopt Q355 structure to use seamless steel pipe, steel pipe diameter and pore-forming aperture phase-match, steel pipe Zhou Dayou slip casting hole.

In an embodiment of the utility model, the pipe periphery slip casting hole diameter is 10 ~ 20mm,10 ~ 20cm staggered arrangement, and 4 holes are no less than to the round, the model of intraductal reinforcing bar is C18, and it is fixed to establish the retaining ring every 1000m, and intraductal reinforcing bar evenly distributed is even, with 90 buckle anchor income upper portion even roof beam, and 4 are no less than to intraductal longitudinal reinforcement, according to 4 directions anchors of quadrature direction respectively and go into.

In an embodiment of the utility model, vertical even roof beam and the vertical even roof beam in pile top all adopt cast-in-place C30 reinforced concrete, indulge horizontal two-way setting, vertical two respectively in pile top along the vertical setting of steel-pipe pile and the vertical setting of wall top wall back of the body outside along being on a parallel with the retaining wall, horizontal every stake is one to set up in the pile top, connect two vertical even roof beams, connect the retaining wall with the vertical even roof beam in wall back of the body side, connect the steel-pipe pile with the vertical even roof beam in pile top, even roof beam cross-section size width is not less than 250mm, highly not less than 200mm, dispose double-deck two-way reinforcing bar.

The utility model provides a pair of reinforced structure of old retaining wall, its beneficial effect including:

(1) The utility model discloses retaining wall's reinforced structure constitutes "II" shape hyperstatic integrated configuration jointly with retaining wall, and this structural style is more stable.

(2) The utility model discloses retaining wall's reinforced structure, all constructions all are located the retaining wall back of the body outside, do not additionally occupy usage space before the retaining wall, and drilling also can adopt the small-size equipment pore-forming in the retaining wall back of the body outside soil body, and easily construction and risk are lower.

(3) The steel pipe piles are arranged in soil bodies on the outer side of the wall back of the retaining wall and are connected with the retaining wall through the connecting beams, the uplift resistance of the steel pipe piles is used for providing the overturning resistance moment, the overturning moment borne by the retaining wall is reduced, the foundation stress of the retaining wall is correspondingly reduced, the horizontal resistance of the steel pipe piles is used for providing the anti-slip force, and the slip force borne by the retaining wall is reduced.

(4) The longitudinal steel bars are arranged in the steel pipe piles, so that the strength and the rigidity of the steel pipe piles can be effectively improved, and the steel pipe piles and the coupling beams can be connected by anchoring the longitudinal steel bars into the coupling beams at the top.

(5) And grouting is carried out in the steel pipe pile, so that longitudinal bars in the steel pipe pile and the steel pipe can form a combination, soil bodies around the pile can be effectively reinforced through the holes on the periphery of the pipe, and the pulling resistance bearing capacity and the horizontal resistance function of the pipe pile are enhanced.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a schematic cross-sectional view of a reinforcing structure of an old retaining wall according to the present invention;

FIG. 2 is a schematic plan view of a reinforcing structure of an old retaining wall according to the present invention;

fig. 3 is a schematic structural view of the steel pipe pile of fig. 1 and 2.

In the figure: 1. a retaining wall; 2. a wall back earth filling ground line; 3. a wall front ground line; 4. connecting the beams transversely; 5. steel pipe piles; 6. solidifying cement paste to reinforce the body; 7. reinforcing steel bars in the pipe; 8. planting bars; 9. connecting beams longitudinally behind the wall; 10. connecting beams longitudinally on the pile top; 11. a steel pipe; 12. grouting holes; 13. and (4) fixing the ring.

Detailed Description

To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings of the embodiments of the present invention are combined to clearly and completely describe the technical solutions of the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Examples

Referring to fig. 1-3, the present invention provides a technical solution: a reinforced structure of an old retaining wall 1 is characterized in that holes are drilled in a soil body on the outer side of the wall back of the retaining wall 1, small equipment is adopted for forming the holes, steel pipes 11, reinforcing steel bars and fixing rings 13 are inserted into the holes, grouting holes 12 are formed in the surfaces of the steel pipes 11, cement slurry is injected into the steel pipes 11, the steel pipes 11 and steel bars 7 in the steel pipes can be combined to form steel pipe piles 5, the steel bars 7 in the steel pipes can effectively improve the strength and rigidity of the steel pipe piles 5, the steel pipe piles 5 can be connected with connecting beams by anchoring longitudinal steel bars into top connecting beams, and the steel pipe piles 5 are anchored into pile top longitudinal connecting beams 11 by anchoring the steel bars 7 in the steel pipes; and can effectively strengthen the soil body around the pile through the grouting hole 12 of pipe periphery, strengthen the resistance to plucking bearing capacity and horizontal resistance effect of the steel-pipe pile 5, the top of the steel-pipe pile 5 and the wall back of the retaining wall 1 set up the vertical tie beam 10 of pile top and the vertical tie beam 9 behind the wall respectively, the top of the steel-pipe pile 5 has horizontal tie beam 4 to connect the vertical tie beam 10 of pile top and the vertical tie beam 9 behind the wall, the vertical tie beam 9 behind the wall connects the vertical tie beam 10 of pile top with the retaining wall 1 through the planting bar 8, the vertical tie beam 10 of pile top connects the steel-pipe pile 5 through the intraductal steel bar 7, utilize the resistance to plucking of the steel-pipe pile 5 to provide the moment of resisting overturning, the moment of overturning that the retaining wall 1 receives itself reduces, its foundation stress reduces correspondingly, utilize the horizontal resistance of the steel-pipe pile 5 to provide the force of resisting slipping, the force that the retaining wall 1 receives itself reduces.

The aperture range of the steel pipe pile 5 is 100-300 mm, the horizontal distance between the hole site and the wall back of the retaining wall 1 is not less than 1000mm, the longitudinal distance along the direction of the retaining wall 1 is not less than 500mm, the hole site of the steel pipe pile 5 is deeply embedded into the retaining wall 1 foundation bearing stratum, the steel pipe pile 5 and the steel pipe 11 adopt a seamless steel pipe for a Q355 structure, the pipe diameter of the steel pipe 11 is matched with the aperture of the formed hole, and the steel pipe 11 is Zhou Dayou grouting holes 12.

The diameter of the grouting holes 12 around the pipe is 10-20mm, the grouting holes are 10-20 cm and are arranged in a staggered mode, one circle of grouting holes is not less than 4 holes, the type of the steel bars 7 in the steel pipe pile 5 is C18, fixing rings 13 are arranged every 1000m for fixing, the steel bars 7 in the steel pipe pile 5 are uniformly distributed and anchored into the upper connecting beam in a 90-degree bending mode, and the longitudinal steel bars in the pipe are not less than 4 and are anchored in 4 orthogonal directions respectively.

The longitudinal coupling beam behind the wall, the longitudinal coupling beam on the pile top and the transverse coupling beam are all cast-in-place reinforced concrete beams, the cross-sectional dimension width of each cast-in-place reinforced concrete beam is not less than 250mm, the height of each cast-in-place reinforced concrete beam is not less than 200mm, double-layer bidirectional reinforcements are arranged, a cement paste curing reinforcing body 6 is arranged on the periphery of the steel pipe pile 5, and the cement paste curing reinforcing body 6 is used for reinforcing soil bodies around the steel pipe pile 5 and enhancing the pulling-resistant bearing capacity and the horizontal resistance effect of the steel pipe pile.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A reinforced structure of an old retaining wall is characterized in that a steel pipe (11) is drilled in a soil body on the outer side of the wall back of a retaining wall (1) and inserted, a steel bar (7) and a fixing ring (13) are arranged in the steel pipe (11), a grouting hole (12) is formed in the surface of the steel pipe (11), cement is injected into the steel pipe (11) under pressure to form a steel pipe pile (5), and a cement curing reinforcing body (6) is formed in the soil body around the steel pipe (11); the top of the steel pipe pile (5) and the wall back of the retaining wall (1) are respectively provided with a wall rear longitudinal coupling beam (9) and a pile top longitudinal coupling beam (10); the rear longitudinal coupling beam (9) of the wall is connected with the retaining wall (1) through a planting bar (8); the steel pipe pile (5) is connected with a pile top longitudinal coupling beam (10) through an in-pipe steel bar (7); the pile top is provided with a transverse connecting beam (4) which is connected with a wall rear longitudinal connecting beam (9) and a pile top longitudinal connecting beam (10); and the rear longitudinal connecting beam (9), the pile top longitudinal connecting beam (10) and the transverse connecting beam (4) of the wall are cast-in-place reinforced concrete beams.

2. The reinforcing structure of an old retaining wall according to claim 1, wherein the bore diameter of the steel pipe pile (5) ranges from 100 mm to 300mm, the horizontal distance between the bore position and the wall back of the retaining wall (1) is not less than 1000mm, the longitudinal distance along the direction of the retaining wall (1) is not less than 500mm, and the bore depth of the steel pipe pile (5) is embedded into the foundation bearing layer of the retaining wall (1).

3. The reinforcing structure of an old retaining wall according to claim 1, wherein the steel pipe (11) of the steel pipe pile (5) adopts a seamless steel pipe for Q355 structure, the pipe diameter of the steel pipe (11) is matched with the pore diameter of the pore-forming hole, and the steel pipe (11) is provided with Zhou Dayou grouting holes (12).

4. The reinforcing structure of an old retaining wall according to claim 3, wherein the diameter of the grouting holes (12) around the pipe is 10-20mm, 10-20 cm are arranged in a staggered manner, one circle of the grouting holes is not less than 4 holes, the number of the reinforcing steel bars (7) in the steel pipe pile (5) is C18, fixing rings (13) are arranged every 1000m for fixing, and the reinforcing steel bars (7) in the steel pipe pile (5) are uniformly distributed.

5. The reinforcing structure of an old retaining wall according to claim 1, characterized in that the longitudinal coupling beams (9) and the pile top longitudinal coupling beams (10) are made of C30 reinforced concrete, have a cross-sectional dimension of not less than 250mm in width and not less than 200mm in height, and are provided with double layers of bidirectional reinforcing steel.

6. The reinforcing structure of an old retaining wall according to claim 1, wherein grouting holes (12) are formed around the steel pipe (11) of the steel pipe pile (5), and a cement slurry solidification reinforcing body (6) is formed on the soil body around the steel pipe pile (5) by grouting to reinforce the soil body around the steel pipe pile (5).