CN215367385U - Cantilever type retaining wall of non-excavation construction - Google Patents

Abstract

The utility model provides a cantilever type retaining wall for trenchless construction, which comprises railings, a wall body and a square pile foundation which are sequentially arranged from top to bottom, wherein the wall body is rigidly connected with the square pile foundation, a reversed filtering layer is arranged on the wall body, water drainage holes are arranged in the wall body, settlement seams are longitudinally arranged in the wall body at equal intervals and penetrate through the railings, asphalt-impregnated wood boards are filled in the settlement seams, and the square pile foundation is of a rectangular section. The utility model reduces the conflict between the retaining wall and the buried municipal pipeline.

Description

Cantilever type retaining wall of non-excavation construction

Technical Field

The utility model relates to the field of reinforced concrete cantilever type retaining walls, in particular to a cantilever type retaining wall for trenchless construction.

Background

In the process of constructing the urban road overpass, the cantilever retaining wall is applied to filling roadbeds with height difference between main roads and auxiliary roads due to smaller size and lighter self weight. Cantilevered retaining walls are typically constructed of a wall body, toe plates, heel plates, and the like. Generally, the larger the toe and heel plates, the higher the stability, resistance to overturning and resistance to sliding of the cantilevered retaining wall, but the toe plates consequently come into the range of the side road, affecting the arrangement of the buried municipal pipeline in the cross section of the side road.

At present, the cantilever type retaining wall is built on a soft soil foundation, and the retaining wall foundation needs to be treated firstly. After the foundation is qualified, the retaining wall foundation is excavated, the reinforced concrete retaining wall is constructed, and foundation treatment and retaining wall construction are two sets of processes. Traditional cantilever type retaining wall construction process is many, and construction cycle is long, need carry out basic excavation and backfill in the work progress, is unfavorable for the raise dust management and control.

In addition, each other does not link to each other between the foundation treatment structure under the retaining wall and the retaining wall structure, only as the load-bearing platform of retaining wall after the foundation treatment, and the retaining wall satisfies the stability and the atress needs of retaining wall self through setting up wall toe and wall heel, and the performance such as anti slippage, antidumping of foundation treatment structure can not effectively be brought into play.

Therefore, there is a need in the art for a solution that reduces the conflict with the buried municipal pipeline and improves the bearing capacity of the retaining wall

SUMMERY OF THE UTILITY MODEL

In order to solve the problems, the utility model provides a cantilever type retaining wall for trenchless construction.

The utility model provides a cantilever type retaining wall of non-excavation construction, includes railing, wall and the square pile basis that top-down set gradually, the wall with square pile basis rigid connection, be provided with the reversed filter bed on the wall, the inside outlet that is provided with of wall, be provided with the subsiding crack along vertical equidistant in the wall, the subsiding crack runs through the railing, the subsiding crack is filled with the asphalt-impregnated plank, the square pile basis adopts rectangular cross section.

The square pile foundation penetrates through a soft soil layer, the horizontal height of the bottom end of the wall body is lower than that of an auxiliary road surface, and the horizontal height of the top end of the wall body is lower than that of a main road surface.

The distance between two adjacent settlement joints is 10-15 m.

Compared with the prior art, the utility model has the following beneficial effects:

1. toe boards and heel boards are not needed, the cross section space of the road is saved, and the conflict between the retaining wall and the buried municipal pipeline is reduced.

2. Need not to carry out foundation treatment alone, need not to excavate the barricade basis, the construction process is few, and construction cycle is short, has reduced the raise dust.

3. The method can be used for dealing with various soft soil foundations by adjusting the length or the distance of the square piles, has low requirement on the bearing capacity of the foundations and has wide application range.

4. The square pile foundation can be prefabricated in factories, and is formed into a pile by static pressing or piling on site, so that the pile forming speed is high, and the construction quality is high.

5. The square pile foundation and the retaining wall body are rigidly connected to form a whole, the square pile foundation and the retaining wall body are stressed integrally, the anti-sliding and anti-overturning capabilities of the square pile foundation are fully exerted, and the stress performance is superior to that of a traditional cantilever type retaining wall.

Drawings

Fig. 1 is a cross-sectional view of a cantilevered retaining wall for trenchless construction.

Fig. 2 is a longitudinal sectional view of the cantilever type retaining wall for trenchless construction.

Detailed Description

The cantilever type retaining wall for trenchless construction shown in fig. 1-2 comprises a railing 1, a wall body 2 and a square pile foundation 3 which are sequentially arranged from top to bottom, wherein the wall body 2 is rigidly connected with the square pile foundation 3, and the wall body 2 and the square pile foundation 3 form a whole to be combined with stress. Be provided with reversed filter layer 4 on the wall 2, wall 2 is inside to be provided with outlet 5, and wall 2 is the same with driven cantilever type retaining wall, but does not have toe and wall heel, and the cross-section width is little, has saved road cross section resource, has reduced and has buried municipal pipeline's conflict with ground. Settlement joints 6 are arranged in the wall body 2 at equal intervals along the longitudinal direction, the railings 1 penetrated by the settlement joints 6 are filled with asphalt-impregnated wood boards in the settlement joints 6, and the interval between every two adjacent settlement joints 6 is 10-15 m. In this embodiment, the settlement joints 6 are arranged at equal intervals of 12m each. The square pile foundation 3 has a rectangular cross section and has higher bending resistance under the same cross section size. The square pile foundations 3 penetrate through the soft soil layer, and the number and the lengths of the square pile foundations 3 are designed and calculated according to the actual foundation bearing capacity and soil mechanical parameters of the soft soil layer. The horizontal height of the bottom end of the wall body 2 is lower than the road surface of the auxiliary road, and the horizontal height of the top end of the wall body 2 is lower than the road surface of the main road.

Non-excavation construction's cantilever type retaining wall implementation case in soft soil foundation place:

the method comprises the following steps: the square pile foundation 3 of the retaining wall is prefabricated in a factory, and the length of the square pile foundation 3 is 0.5 m greater than the designed length.

Step two: after the field is leveled, the concrete position of the square pile foundation 3 is positioned, and the prefabricated square pile foundation 3 can be constructed by adopting a static pressure method or a hammering method.

Step three: and after the prefabricated square pile foundation 3 is qualified by inspection, 0.5 m of pile head concrete is chiseled out to expose the reinforcing steel bars in the square pile foundation 3.

Step four: and (3) carrying out construction of a wall body template of the retaining wall, binding the steel bars of the wall body 2, and welding the steel bars in the square pile foundation 3 and the main steel bars of the wall body 2.

Step five: and (5) pouring concrete of the wall body 2.

Step six: and maintaining the wall body 2 of the retaining wall, and removing the template after the design strength is reached.

Step seven: and constructing a reverse filtering layer on the rear wall of the wall body 2 of the retaining wall, backfilling after the platform, and compacting by layers.

The above description is only for the preferred embodiment of the present invention, but the present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes and modifications without departing from the inventive concept of the present invention, which falls into the protection scope of the present invention.

Claims (3)

1. The utility model provides a cantilever type retaining wall of non-excavation construction, characterized by, railing (1), wall (2) and square pile basis (3) that set gradually including top-down, wall (2) with square pile basis (3) rigid connection, be provided with reversed filter (4) on wall (2), wall (2) inside is provided with outlet (5), be provided with settlement joint (6) along vertical equidistant in wall (2), settlement joint (6) run through railing (1), fill in settlement joint (6) and have the pitch-impregnated plank, square pile basis (3) adopt the rectangular cross section.

2. A cantilevered retaining wall for trenchless construction as claimed in claim 1, wherein the square pile foundation (3) penetrates soft soil, the bottom end of the wall body (2) has a lower level than a sub road surface, and the top end of the wall body (2) has a lower level than a main road surface.

3. The trenchless construction cantilevered retaining wall of claim 1, wherein a distance between adjacent two settlement joints (6) is 10-15 m.

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