阅读说明：本技术 新型桩基托梁挡墙及其施工方法 (Novel pile foundation joist retaining wall and construction method thereof ) 是由 王新泉 于 2021-09-09 设计创作，主要内容包括：本发明提供一种新型桩基托梁挡墙及其施工方法,第一桩基和第二桩基依次设置在边坡上,桩基与边坡交界处设有保护区,第二桩基顶部设有楔形托梁,渗水区设置在楔形托梁和保护区之间,楔形托梁上设有插杆,预制挡墙的楔形底端设有插孔,通过插杆安装在楔形托梁上,第一桩基顶端和预制挡墙顶部背坡面均设置带有栓孔的支座,横梁设置在第一桩基和楔形托梁之间,行车箱梁通过箱梁支座设置在横梁上,支撑杆两端分别通过高强螺栓固定在第一桩基顶端和预制挡墙顶部背坡面的支座上,卸荷板设有透水孔,设置在预制挡墙的迎坡面,反滤层设置在预制挡墙的迎坡面,然后在反滤层和边坡之间进行墙后填土,具有施工效率高,构造稳固,能防冲刷对边坡扰动小的优点。(The invention provides a novel pile foundation joist retaining wall and a construction method thereof, wherein a first pile foundation and a second pile foundation are sequentially arranged on a side slope, a protective area is arranged at the junction of the pile foundation and the side slope, a wedge-shaped joist is arranged at the top of the second pile foundation, a water seepage area is arranged between the wedge-shaped joist and the protective area, an inserting rod is arranged on the wedge-shaped joist, an inserting hole is arranged at the wedge-shaped bottom end of a prefabricated retaining wall, the prefabricated retaining wall is arranged on the wedge-shaped joist through the inserting rod, supports with bolt holes are respectively arranged at the top end of the first pile foundation and the back slope surface at the top of the prefabricated retaining wall, a cross beam is arranged between the first pile foundation and the wedge-shaped joist, a travelling crane box girder is arranged on the cross beam through a box girder support, two ends of the support rod are respectively fixed on the supports at the top end of the first pile foundation and the back slope surface at the top of the prefabricated retaining wall through high-strength bolts, an unloading plate is provided with water seepage hole and arranged on the back slope surface of the prefabricated retaining wall, a reverse filter layer is arranged on the back slope surface of the prefabricated retaining wall, then earth is filled between the reverse filter layer and the side slope, the construction method has the advantages of high construction efficiency, stable structure and small disturbance to the slope due to scour prevention.)

1. A construction method of a novel pile foundation joist retaining wall is characterized by comprising the following steps:

step 1): drilling holes on a side slope (8) and constructing a first pile foundation (3) and a second pile foundation (14) in a segmented manner, so that the lower ends of the first pile foundation (3) and the second pile foundation (14) are anchored into a stable soil layer or a rock stratum of the side slope (8) to a sufficient depth, when constructing pile foundations on the ground of the side slope (8), reinforcing bars are arranged together with a wedge-shaped joist (12) and a cross beam (7), steel insertion rods (11) are embedded in the wedge-shaped joist (12), the cross beam (7), the first pile foundation (3), the second pile foundation (14) and the wedge-shaped joist (12) are cast into a whole at the same time, wherein the wedge-shaped joist (12) is arranged on the second pile foundation (14), the cross beam (7) is connected to one side of the wedge-shaped joist (2), and the other end of the cross beam (7) is connected with the first pile foundation (3);

step 2): the method comprises the steps of manufacturing prefabricated retaining wall units (24) in a prefabrication factory in batches, wherein the prefabricated retaining wall units (24) comprise prefabricated retaining walls (10) and unloading plates arranged on the edge sides of the prefabricated retaining walls (10), firstly, integrally reinforcing the wall bodies and the unloading plates of the prefabricated retaining walls (10), reserving insertion holes (19) in the wall bodies, arranging notches (22) at one ends of the wall bodies, arranging convex openings (23) at the other ends of the wall bodies, reserving two rows of water permeable holes (20) in the unloading plates (15), and finally, pouring and forming;

step 3): mounting the prefabricated retaining wall units (24) on a wedge-shaped joist (12) through inserted bars (11), connecting the prefabricated retaining wall units (24) through concave-convex type tongues and grooves, and arranging rubber strips (21) in gaps at the connection positions;

step 4): mounting box girder supports (6) on the cross beam (7), then mounting a travelling crane box girder (5), mounting supports (1) at the corresponding positions of the top end of the first pile foundation (3) and the prefabricated retaining wall (10), and fixing the support rods (4) on the supports (1) at the two ends;

step 5): the method comprises the steps of digging ground surface soil of a side slope (8) at the junction of a pile foundation and the side slope (8) to form a hemispherical pit to form an anti-scouring protection area (9), then forming a water seepage area (13) between a second pile foundation (14) and a wedge-shaped joist (12), then arranging a reverse filter layer (16) on the slope surface of a prefabricated retaining wall (10), and finally filling soil (17) after wall facing on the slope surface of the reverse filter layer (16).

2. The method for constructing a novel pile foundation joist retaining wall according to claim 1 wherein the insertion holes (19) are in communication with the bottom of the wall.

3. The construction method of the novel pile foundation joist retaining wall according to claim 1, wherein the notch (22) and the lip (23) are located on the same horizontal line, and the shape and the size of the notch (22) and the lip (23) are matched.

4. The construction method of a novel pile foundation joist retaining wall according to claim 1, wherein the insertion holes (19) of the prefabricated retaining wall (10) are arranged corresponding to the wedge joists (12), and the steel insertion rods (11) on the wedge joists (12) are inserted into the insertion holes (19).

5. The method of constructing a novel pile-based joist wall as claimed in claim 1 wherein the bottom surface of the precast wall (10) is a sloping surface having the same slope as the top surface of the wedge-shaped joist (12).

6. The construction method of the novel pile foundation joist retaining wall according to claim 1, wherein plain concrete is poured into the hemispherical pit to form an anti-scouring protection zone (9).

7. A method of constructing a novel pile-based joist wall as claimed in claim 1 wherein graded crushed stone is filled between the second pile foundation (14) and the wedge-shaped joist (12) to form a permeable zone (13).

8. A novel pile foundation joist retaining wall characterized by being constructed according to the method of construction of the novel pile foundation joist retaining wall as claimed in any one of claims 1 to 7 thereon.

Technical Field

The invention relates to the technical field of slope supporting structures, in particular to a novel pile foundation joist retaining wall and a construction method thereof.

Background

The side slope support refers to a retaining, reinforcing and protecting measure which is taken for the side slope to ensure the safety of the side slope and the environment. The commonly used supporting structure types are: gravity type barricade, counterfort formula barricade etc, under complicated construction environment, because foundation soil layer overburden is too thick and the foundation bearing capacity is not enough under the barricade, in order to avoid placing the barricade in unstable soil layer or avoid the barricade basis to bury too deeply, need adopt pile foundation joist barricade, namely set up the joist on the pile foundation, and establish retaining wall on the joist, make the barricade obtain sufficient stability and bearing capacity, the bearing capacity problem of foundation has been solved to present conventional pile foundation joist barricade, but can cause the increase of road bed land area because of receiving the slope difficulty, and present pile foundation joist influences greatly to the side slope disturbance, there is unstable technical defect of structure, easily cause domatic rain wash in addition, the disturbance and the destruction to natural environment have been increased.

Disclosure of Invention

The invention aims to provide a novel pile foundation joist retaining wall which is high in construction efficiency, stable in structure, capable of effectively preventing and treating slope rainwater scouring and small in side slope disturbance and a construction method thereof.

In order to achieve the purpose, the technical scheme provides a construction method of a novel pile foundation joist retaining wall, which comprises the following steps:

step 1): drilling a hole on the slope and constructing a first pile foundation and a second pile foundation in a segmented manner, so that the lower ends of the first pile foundation and the second pile foundation are anchored into a stable soil layer or a rock stratum of the slope to a sufficient depth, when constructing the pile foundation on the ground of the slope, reinforcing bars are arranged together with a wedge-shaped joist and a beam, steel insertion rods are embedded in the wedge-shaped joist, and the wedge-shaped joist and the beam are cast into a whole, wherein the wedge-shaped joist is arranged on the second pile foundation, the beam is connected to one side of the wedge-shaped joist, and the other end of the beam is connected with the first pile foundation;

step 2): the method comprises the steps that prefabricated retaining wall units are manufactured in batches in a prefabrication factory, wherein each prefabricated retaining wall unit comprises a prefabricated retaining wall and an unloading plate arranged on the side of the prefabricated retaining wall, the wall body of the prefabricated retaining wall and the unloading plate are integrally reinforced, jacks are reserved in the wall body, one end of the wall body is provided with a notch, the other end of the wall body is provided with a convex opening, two rows of water permeable holes are reserved in the unloading plate, and finally, pouring forming is carried out;

step 3): mounting the prefabricated retaining wall units on a wedge-shaped joist through inserted bars, connecting the prefabricated retaining wall units through concave-convex type tongues and grooves, and arranging rubber strips in gaps at the joints;

step 4): mounting box girder supports on the cross beam, mounting a travelling crane box girder, mounting supports at the top end of the first pile foundation and the corresponding positions of the prefabricated retaining walls, and fixing the support rods on the supports at the two ends;

step 5): and excavating the ground surface soil of the side slope at the junction of the pile foundation and the side slope to form a hemispherical pit to form an anti-scouring protection area, then forming a water seepage area between the second pile foundation and the wedge-shaped joist, arranging a refilter layer on the upstream surface of the prefabricated retaining wall, and finally filling soil behind the wall on the upstream surface of the refilter layer.

In some embodiments, the receptacle communicates with the bottom of the wall.

In some embodiments, the notch and the lip are located on the same horizontal line and the notch and the lip are matched in shape and size.

In some embodiments, the insertion holes of the prefabricated retaining wall are arranged corresponding to the wedge joists, and steel insertion rods on the wedge joists are inserted into the insertion holes.

In some embodiments, the bottom surface of the prefabricated retaining wall is a sloping surface having the same slope as the top surface of the wedge-shaped joists.

In some embodiments, plain concrete is poured into the hemispherical pit to form an anti-scour protection area.

In some embodiments, graded crushed stone is filled between the second pile foundation and the wedge-shaped joist to form a permeable zone.

A novel pile foundation joist retaining wall is constructed according to a construction method of the novel pile foundation joist retaining wall.

Compared with the prior art, the technical scheme has the following characteristics and beneficial effects:

compared with the prior art, the prefabricated retaining wall is adopted, the prefabricated retaining wall can be manufactured in batches in advance, the installation is convenient, the construction period is greatly reduced, the energy is saved, the environment is protected, and the technical advantage is obvious.

The pile foundation, the cross beam and the wedge-shaped joist form an integral structure, the structure is stable, disturbance to the side slope is small, effective supporting force is provided for the prefabricated retaining wall through the supporting rod, the technical advantages are obvious, the road bridge constructed in the later period is suspended in the air and does not occupy the land, and the original soil layer structure of the side slope is not damaged.

The protection area provided by the invention has a simple structure, effectively protects the erosion of the rainwater runoff on the slope pile foundation, and has stronger practicability.

The unloading plate with the water permeable holes, the water seepage area and the inverted filter layer are arranged, so that the soil pressure of the prefabricated retaining wall is effectively reduced, water can be effectively drained, and water and soil loss is reduced.

Drawings

FIG. 1 is a schematic view of a novel pile foundation joist retaining wall;

FIG. 2 is a schematic structural view of a pile foundation, a cross beam and a wedge joist;

fig. 3 is a cross-sectional view of a prefabricated retaining wall unit;

fig. 4 is a top plan view of a prefabricated retaining wall unit;

fig. 5 is a schematic view showing the connection of prefabricated retaining wall units;

FIG. 6 is a schematic view of the arrangement of the stand-offs;

fig. 7 is a schematic view of the mounting of the support rod.

Wherein: 1-a support; 2-high strength bolt; 3-first pile foundation; 4-support bar; 5-a travelling crane box girder; 6-box girder support; 7-beam; 8-side slope; 9-protection zone; 10-prefabricated retaining wall; 11-inserting rod; 12-wedge joist; 13-a water-permeable zone; 14-second pile foundation; 15-unloading plate; 16-the inverted filter layer; 17-filling soil behind the wall; 18-bolt hole; 19-a jack; 20-water permeable holes; 21-rubber strip; 22-a notch; 23-a bead; and 24-prefabricating the retaining wall unit.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments that can be derived by one of ordinary skill in the art from the embodiments given herein are intended to be within the scope of the present invention.

It will be understood by those skilled in the art that in the present disclosure, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for ease of description and simplicity of description, and do not indicate or imply that the referenced devices or components must be constructed and operated in a particular orientation and thus are not to be considered limiting.

It is understood that the terms "a" and "an" should be interpreted as meaning that a number of one element or element is one in one embodiment, while a number of other elements is one in another embodiment, and the terms "a" and "an" should not be interpreted as limiting the number.

The novel pile foundation joist retaining wall comprises a support (1), a high-strength bolt (2), a first pile foundation (3), a support rod (4), a travelling crane box girder (5), a box girder support (6), a cross beam (7), a protection zone (9), a prefabricated retaining wall (10), an inserted bar (11), a wedge-shaped joist (12), a water seepage zone (13), a second pile foundation (14), an unloading plate (15), a reverse filter layer (16) and earth (17) filled behind a wall.

The anti-scouring protection system comprises a side slope (8), a first pile foundation (3), a second pile foundation (14), a protection area (9), a semi-spherical pit and a plain concrete pouring area (9), wherein the first pile foundation (3) and the second pile foundation (14) are sequentially arranged on the side slope (8) at intervals, the junction of the first pile foundation (3) and the side slope (8) and the second pile foundation (14) are provided with the protection area (9), the surface of the side slope (8) is dug out to form the semi-spherical pit, and the plain concrete is poured into the semi-spherical pit to form the anti-scouring protection area (9); the top of the second pile foundation (14) is provided with a wedge-shaped joist (12), and the water seepage area (13) is arranged between the wedge-shaped joist (12) and the protection area (9); wherein the wedge-shaped joist (12) is wedge-shaped, the upper plane of the wedge-shaped joist (12) is a slope surface, a water seepage area (13) is arranged between the lower plane of the wedge-shaped joist (12) and the side slope (8), and the water seepage area (13) is filled graded broken stones.

Be equipped with inserted bar (11) on wedge joist (12), be equipped with jack (19) in prefabricated barricade (10), prefabricated barricade (10) is installed on wedge joist (12) through inserted bar (11), wherein jack (19) and the corresponding setting of wedge joist (12) of prefabricated barricade (10), in steel inserted bar (11) on wedge joist (12) inserted jack (19), the bottom surface of prefabricated barricade (10) is the domatic the same with wedge joist (12) top surface inclination.

The back slope surface at the top of the first pile foundation (3) and the top of the prefabricated retaining wall (10) is provided with a support (1) with bolt holes (18), and the two ends of the support rod (4) are fixed on the support (1) at the top of the first pile foundation (3) and the top of the prefabricated retaining wall (10) back slope surface through high-strength bolts (2) respectively.

The beam (7) is arranged between the first pile foundation (3) and the wedge-shaped joist (12), the traveling box girder (5) is arranged on the beam (7) through a box girder support (6), the unloading plate (15) is provided with a water permeable hole (20), the unloading plate (15) is arranged on the slope-facing surface of the prefabricated retaining wall (10), the inverted filter layer (16) is arranged on the slope-facing surface of the prefabricated retaining wall (10), and then soil (17) is filled behind the wall between the inverted filter layer (16) and the slope (8).

The prefabricated retaining wall (10) is formed by connecting prefabricated retaining wall units (24), wherein the prefabricated retaining wall units (24) comprise the prefabricated retaining wall (10) and unloading plates arranged on the edge sides of the prefabricated retaining wall (10), the wall body and the unloading plates of the prefabricated retaining wall (10) are integrally reinforced, one end of the prefabricated retaining wall (10) is provided with a notch (22), the other end of the prefabricated retaining wall is provided with a convex opening (23), two adjacent prefabricated wall bodies (10) are connected through the notch (22) and the convex opening (23), and the joint of the prefabricated retaining wall units (24) is provided with a rubber strip (21). In some embodiments, the notch (22) and the lip (23) are located on the same horizontal line, and the notch (22) and the lip (23) are matched in shape and size.

The protection area (9) is of an anti-scouring hemispherical concrete structure.

The water seepage area (13) is graded crushed stone.

The inverted filter layer (16) is graded gravel.

The first pile foundation (3) and the second pile foundation (14) are round drilled piles or square dug piles.

First pile foundation (3) top elevation be higher than second pile foundation (14), and satisfy behind erection bracing pole (4) and do not influence the vehicle on driving case roof beam (5) current, wherein including a driving passageway on driving case roof beam (5) at least to supply the vehicle current in driving passageway.

The size of the top surface of the wedge-shaped joist (12) is wider than that of the bottom surface of the prefabricated retaining wall (10).

The scheme provides a construction method of a novel pile foundation joist retaining wall, the novel pile foundation joist retaining wall constructed by the construction method is shown in figure 1, and the construction method comprises the following steps:

the novel pile foundation joist retaining wall is arranged on a side slope (8).

1) As shown in figure 2, according to the engineering design, a drilling machine is used for drilling holes on the side slope (8), the first pile foundation (3) and the second pile foundation (14) are constructed in sections, so that the lower ends of the first pile foundation (3) and the second pile foundation (14) are anchored into a stable soil layer or rock stratum of the side slope (8) to a sufficient depth, when constructing the pile foundation on the slope ground, the reinforcing bars are arranged together with the wedge-shaped joists (12) and the cross beams (7), steel inserted rods (11) are embedded in the wedge-shaped joists (12), the cross beam (7), the first pile foundation (3), the second pile foundation (14) and the wedge-shaped joists (12) are poured integrally at the same time, the wedge-shaped joist (12) is arranged on the second pile foundation (14) and is wedge-shaped, the upper plane of the wedge-shaped joist (12) is a slope, the cross beam (7) is connected to one side of the wedge-shaped joist (2), and the other end of the cross beam (7) is connected with the first pile foundation (3).

2) As shown in fig. 3 and 4, according to engineering requirements, prefabricated retaining wall units (24) are manufactured in batches in a prefabricated factory, the length of the prefabricated retaining wall units (24) is determined according to the actual engineering situation, wherein each prefabricated retaining wall unit (24) comprises a prefabricated retaining wall (10) and an unloading plate arranged on the edge side of the prefabricated retaining wall (10), the wall body of the prefabricated retaining wall (10) and the unloading plate are integrally reinforced, jacks (19) are reserved in the wall body, one end of the wall body is provided with a notch (22), the other end of the wall body is provided with a convex opening (23), two rows of water permeable holes (20) are reserved in the unloading plate (15), and finally, the prefabricated retaining wall units are cast and molded.

Wherein one end of the jack (19) is communicated with the outside, and in some embodiments, the jack (19) is communicated with the bottom of the wall body. In some embodiments, the recess (22) and the lip (23) are located on the same horizontal line, and the recess (22) and the lip (23) are matched in shape and size so that the two prefabricated retaining walls (10) can be connected. Unloading plates (15) are arranged on the sides of the prefabricated retaining walls (10), and water permeable holes (20) in the unloading plates (15) are uniformly arranged at intervals.

3) As shown in figure 5, the prefabricated retaining wall units (24) are installed on the wedge-shaped joists (12) through the inserted rods (11), the prefabricated retaining wall units (24) are connected through concave-convex type tongue-and-groove joints, and rubber strips (21) are arranged in gaps at the connection positions.

Specifically, the insertion holes (19) of the prefabricated retaining wall (10) are arranged corresponding to the wedge-shaped joists (12), and the steel insertion rods (11) on the wedge-shaped joists (12) are inserted into the insertion holes (19). The two prefabricated retaining wall units (24) are connected with the convex opening of the adjacent prefabricated retaining wall (10) through the concave opening of the prefabricated retaining wall (10). And the bottom surface of the prefabricated retaining wall (10) is a slope surface with the same inclination as the top surface of the wedge-shaped joist (12).

4) As shown in fig. 6 and 7, a box girder support (6) is installed on a cross beam (7), then a travelling crane box girder (5) is installed, then the support (1) is installed at the top end of the first pile foundation (3) and the corresponding position of the prefabricated retaining wall (10), and the support rod (4) is fixed on the support (1) by using a high-strength bolt (2).

The traveling crane box girder (5) is of an inverted trapezoidal structure with the cross section area gradually reduced from top to bottom, the side-back slope surface mounting support (1) of the prefabricated retaining wall (10) is provided with bolt holes (18), two ends of the supporting rod (4) are connected to the two supports (1) respectively, and the high-strength bolt (2) penetrates through the bolt holes (18) and the supporting rod (4) to be connected and fixed. The traveling box beam (5) at least comprises a traveling passage for vehicles to pass through.

5) As shown in figure 1, the ground surface soil of the side slope (8) is dug at the junction of the pile foundation and the side slope (8) to form a hemispherical pit, plain concrete is poured into the hemispherical pit to form an anti-scouring protection area (9), graded broken stones are filled between the second pile foundation (14) and the wedge-shaped joist (12) to form a water seepage area (13), a reverse filter layer (16) is arranged on the slope surface facing the prefabricated retaining wall (10), and finally, the soil (17) is filled after the slope surface facing the reverse filter layer (16) is subjected to wall filling.

The present invention is not limited to the above-mentioned preferred embodiments, and any other products in various forms can be obtained by anyone in the light of the present invention, but any changes in the shape or structure thereof, which have the same or similar technical solutions as those of the present application, fall within the protection scope of the present invention.