CN217267616U

CN217267616U - Frame-type retaining wall with predeformation function

Info

Publication number: CN217267616U
Application number: CN202220920785.4U
Authority: CN
Inventors: 郭小玲; 李潇; 李拨; 刘佳; 曾彬
Original assignee: Chengdu Design & Research Institute Of Building Materials Industry Co ltd
Current assignee: Chengdu Design & Research Institute Of Building Materials Industry Co ltd
Priority date: 2022-04-20
Filing date: 2022-04-20
Publication date: 2022-08-23
Anticipated expiration: 2032-04-20

Abstract

The utility model discloses a frame-type retaining wall with predeformation function, including vertical wallboard, the lower extreme and the inboard wall heel board of wallboard are connected, are equipped with frame construction between wallboard and the wall heel board, and the wallboard includes inner protective layer and outer support layer, is equipped with the EPS board between inner protective layer and the outer support layer. The utility model has the advantages that: an EPS board with a certain thickness is arranged between the wall back and the filling soil, and the soil pressure acting on the retaining wall is reduced through the pre-deformation of the EPS board, so that the safety degree is improved and the construction cost is reduced; the frame beam and the column respectively provide restraint for the wall body and the bottom plate, the purpose of reducing the span of the plate is achieved, internal force distribution is reasonably optimized, and meanwhile the construction difficulty is reduced.

Description

Frame-type retaining wall with predeformation function

Technical Field

The utility model relates to a road, railway, harbour, industry and civil retaining engineering field specifically are a frame-type retaining wall with function warp in advance.

Background

The retaining wall is a retaining structure which is arranged for preventing the deformation and instability of rock and soil mass when the retaining wall has a free face, and is widely applied to various branch fields of civil engineering. The retaining wall is usually in the form of gravity type, cantilever type, buttress type, etc.

The gravity type retaining wall has good self stability and simple and convenient construction, but has large material consumption of masonry, high labor cost and limited applicable height (generally less than 7 meters, and uneconomic when the height is higher); the cantilever type retaining wall has large bending moment, so the use height is limited, and the approximate range is almost the same as that of the gravity type retaining wall; the counterfort retaining wall structure has relatively light dead weight, the rigidity is greatly improved due to the existence of the rib plates, the applicable height is improved to a certain extent (7-12 meters), but along with the increase of the height, the difference between the actual soil pressure distribution acting on the wall back and the calculation result of the classical soil pressure theory is gradually great, in order to meet the engineering safety, the soil pressure of the retaining wall structure exceeding a certain height needs to be multiplied by an amplification factor (relatively conservative) in order to standardize and provide experientiality, in addition, the rib plates of the counterfort retaining wall are usually designed to be trapezoidal or triangular, and the construction is relatively complex.

It is known that the magnitude of the earth pressure on a retaining wall is related to not only the stiffness of the retaining wall, the roughness of the wall back, the filling behind the wall, the drainage conditions, etc., but also the magnitude of the deformation and the direction of displacement of the retaining wall. When the retaining wall is in an active stress state and reaches the limit balance, the soil pressure distribution on the retaining wall is in dynamic balance, and the larger the deformation of the retaining wall is, the smaller the soil pressure is.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a: the utility model provides a frame-type retaining wall with predeformation function mainly for reducing the soil pressure on the retaining wall body, has solved the relatively complicated problem of counterfort formula retaining wall construction. The EPS boards adhered to the wall backs provide pre-deformation, so that the soil pressure acting on the wall boards is reduced, and meanwhile, the counterfort rib boards are changed into concrete frames, so that the aims of reducing the construction difficulty and reducing the construction cost are fulfilled.

The purpose of the utility model is realized through the following technical scheme:

the utility model provides a frame-type retaining wall with predeformation function, includes vertical wallboard, and the lower extreme and the inboard wall heel board of wallboard are connected, are equipped with frame construction between wallboard and the wall heel board, and the wallboard includes interior protective layer and outer support layer, is equipped with the EPS board between interior protective layer and the outer support layer.

Furthermore, the inner protective layer is a cement mortar layer, and the outer support layer is a reinforced concrete layer.

Furthermore, an adhesive layer is arranged between the reinforced concrete layer and the EPS board.

Furthermore, the frame structure comprises frame columns and frame beams, the frame columns are arranged on the wall heel plate, and the frame beams are connected between the frame columns and the wall plate.

Furthermore, the frame columns are vertically arranged, and the frame beams are horizontally arranged.

Furthermore, the frame beam is connected with the reinforced concrete layer of the wallboard, and the frame column and the frame beam are of concrete structures.

Furthermore, the upper part and the middle part of the frame column are both connected with frame beams.

Furthermore, the lower end of the wall plate is connected with the toe plate at the outer side.

Furthermore, the wall heel plate is horizontally arranged, and the wall toe plate is horizontally arranged.

Furthermore, the reinforced concrete layer of the wall board is integrally cast with the toe board and the heel board.

The utility model discloses the function of realization:

1. in order to solve the problems of overlarge soil pressure on a high retaining wall and great difference between the soil pressure distribution and the result of classical theoretical calculation, an EPS board with a certain thickness is arranged between a wall back and filling according to the correlation between active soil pressure and deformation, and the soil pressure acting on the retaining wall is reduced through predeformation of the EPS board so as to improve the safety degree and reduce the construction cost.

2. In order to ensure that the retaining wall is stressed simply and reliably and construction is convenient, a concrete frame is longitudinally arranged on the wall back along the retaining wall. The frame beam and the frame column respectively provide restraint for the wall body and the bottom plate, the purpose of reducing the span of the plate is achieved, internal force distribution is reasonably optimized, and meanwhile the construction difficulty is reduced.

The beneficial effects of the utility model, use cement plant mine mountain unloading platform 8 meters high retaining wall as an example, the retaining wall layer of holding power is strong morals and manners granite, packs behind the wall to be the rubble (severe 16 kN/m) ³ Integrated internal friction angle 35 degrees):

1. numerical simulation shows that under the same other conditions, the earth pressure of the retaining wall with the EPS boards is reduced by about 17% -35% compared with that of the retaining wall without the EPS boards (see the attached figures 3 and 4), and the greater the rigidity of the retaining wall is, the more obvious the reduction is.

2. On the premise that other conditions are the same, the larger the thickness of the EPS board is, the smaller the deformation modulus is, the larger the provided predeformation is, the smaller the soil pressure acting on the wallboard is (on the premise that the soil behind the wall does not generate a through fracture surface, the soil behind the wall is damaged due to excessive deformation, and the numerical simulation fails).

3. The frame type retaining wall with the pre-deformation function (the thickness of the EPS plate is 20cm, the deformation modulus E is 0.3MPa) is reduced by about 17 percent compared with the soil pressure on the conventional counterfort retaining wall, the engineering quantity of the frame part is reduced by about 40 percent compared with that of a ribbed slab, the engineering quantity difference between the wall plate and the bottom plate concrete is not large, and the using quantity of stressed steel bars is reduced by about 15 percent.

4. The frame portion of the frame-type retaining wall saves about 20% of the formwork compared with the rib plate of the buttress-type retaining wall.

The main scheme and the further selection schemes of the utility model can be freely combined to form a plurality of schemes, which are the schemes that can be adopted and claimed by the utility model; in addition, the utility model can be freely combined between the (non-conflict selection) selections and other selections. The skilled person in the art can understand that there are many combinations according to the prior art and the common general knowledge after understanding the solution of the present invention, which are all the technical solutions to be protected by the present invention, and the solution is not exhaustive here.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is an enlarged view of fig. 1 at a.

Fig. 3 is a soil pressure distribution diagram of a retaining wall without an EPS plate.

Fig. 4 is a soil pressure distribution diagram of a retaining wall having EPS plates.

In the figure: the concrete wall comprises, by weight, 1-wallboard, 11-reinforced concrete layer, 12-adhesive layer, 13-EPS board, 14-cement mortar layer, 2-toe board, 3-heel board, 4-frame column and 5-frame beam.

Detailed Description

The invention will be further described with reference to the following specific embodiments and the accompanying drawings.

Referring to fig. 1 and 2, a frame type retaining wall having a predeformation function includes vertical wall panels 1, horizontal heel panels 3, horizontal toe panels 2, and a frame structure including frame columns 4 and frame beams 5.

The wall panel 1 comprises an inner protective layer and an outer support layer. The inner protection layer is a cement mortar layer 14 and is used for protecting the EPS boards 13 and avoiding adverse effects caused by direct contact of soil bodies and the EPS boards 13. The outer supporting layer is a reinforced concrete layer 11 and is used for supporting the EPS boards 13 and ensuring the stability of soil retaining support.

Be equipped with EPS board 13 between cement mortar layer 14 and reinforced concrete layer 11, EPS board 13 is polystyrene cystosepiment, through EPS board predeformation, reduces the soil pressure that acts on retaining wall to improve the degree of safety and reduce engineering cost.

An adhesive layer 12 is arranged between the reinforced concrete layer 11 and the EPS board 13, so that the connection between the two board layers is realized.

11 lower extreme of reinforced concrete layer of wallboard 1 and inboard wall heel board 3, the wall toe board 2 an organic whole in the outside are pour and are formed, utilize wall heel board 3 and wall toe board 2 to support wallboard 1, avoid wallboard 1 to take place to empty, and wall heel board 3 is located the below of the soil body moreover, utilizes the dead weight of the soil body can guarantee wallboard 1's stability.

The frame column 4 and the frame beam 5 are of concrete structures, the vertical frame column 4 is arranged on the wall heel plate 3, and the horizontal frame beam 5 is connected between the frame column 4 and the reinforced concrete layer 11 of the wall plate 1. The frame posts 4 are uniformly arranged along the length direction of the wall plate 1, and the upper part and the middle part of each frame post 4 are connected with a frame beam 5. The frame beam and the frame column respectively provide restraint for the wall body and the bottom plate, the purpose of reducing the span of the plate is achieved, internal force distribution is reasonably optimized, and meanwhile the construction difficulty is reduced.

The aforesaid the utility model discloses basic embodiment and each further alternative can the independent assortment in order to form a plurality of embodiments, is the utility model discloses can adopt and claim the embodiment of protection. In the scheme of the utility model, each selection example can be combined with any other basic examples and selection examples at will.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. The utility model provides a frame-type retaining wall with predeformation function, includes vertical wallboard (1), its characterized in that: the lower extreme and the inboard wall heel board (3) of wallboard (1) be connected, be equipped with frame construction between wallboard (1) and wall heel board (3), wallboard (1) is equipped with EPS board (13) including interior protective layer and outer support layer between interior protective layer and the outer support layer.

2. A framed retaining wall with a predeformation function according to claim 1, characterized in that: the inner protective layer is a cement mortar layer (14), and the outer support layer is a reinforced concrete layer (11).

3. A framed retaining wall with a predeformation function according to claim 2, characterized in that: an adhesive layer (12) is arranged between the reinforced concrete layer (11) and the EPS board (13).

4. A frame-type retaining wall having a predeformation function according to claim 1, 2 or 3, wherein: the frame structure comprises frame columns (4) and frame beams (5), wherein the frame columns (4) are arranged on the wall heel plate (3), and the frame beams (5) are connected between the frame columns (4) and the wall plate (1).

5. A framed retaining wall with a predeformation function according to claim 4, characterized in that: the frame columns (4) are vertically arranged, and the frame beams (5) are horizontally arranged.

6. A framed retaining wall with a predeformation function according to claim 4, characterized in that: the frame beam (5) is connected with a reinforced concrete layer (11) of the wallboard (1), and the frame column (4) and the frame beam (5) are of a concrete structure.

7. A framed retaining wall with a predeformation function according to claim 4, characterized in that: the upper part and the middle part of the frame column (4) are both connected with a frame beam (5).

8. A framed retaining wall with a predeformation function according to claim 1, characterized in that: the lower end of the wallboard (1) is connected with the toe board (2) at the outer side.

9. A framed retaining wall with a predeformation function according to claim 8, characterized in that: the wall heel plate (3) is horizontally arranged, and the wall toe plate (2) is horizontally arranged.

10. A framed retaining wall with a predeformation function according to claim 8 or 9, characterized in that: the reinforced concrete layer (11) of the wallboard (1) is integrally cast with the toe board (2) and the heel board (3).