CN105937244A - Beam column plate type embankment earth-retaining wall on steep slope foundation and construction method thereof - Google Patents

Abstract

A beam-column-slab type embankment retaining wall on a steep slope foundation and a construction method thereof. The structural characteristics of the retaining wall are: the lower end of the column is connected to the horizontal ground beam at the toe of the wall, the ground beams are connected to each other through the longitudinal connecting beam at the toe of the wall, and a retaining wall is installed in the space surrounded by the connecting beam and the column. Dirt board. The construction method is as follows: A. Longitudinal excavation of the connecting beam groove at the toe position of the retaining wall; excavation of the horizontal ground beam groove to the inner side of the steep slope in the connecting beam groove; B. Simultaneous construction of the connecting beam groove and the ground beam groove Formwork, binding steel bars, pouring concrete, and constructing ground beams and connecting beams that are fixedly connected; C, erecting column formwork at the wall toe of the ground beams, binding steel bars, pouring concrete, and constructing columns that are fixedly connected to the ground beams; D, Install prefabricated retaining panels in the space enclosed by connecting beams and columns. The retaining wall has a large anti-overturning moment, good retaining effect, and is suitable for embankment retaining on steep slope foundations; it is convenient to excavate, has a small excavation volume, and has low engineering cost.

Description

Beam-column slab embankment retaining wall on steep slope foundation and construction method thereof

technical field

The invention relates to a beam-column slab embankment retaining wall on a steep slope foundation and a construction method thereof.

Background technique

In engineering construction, the slope with a ground cross slope greater than 1:2.5 is called a steep slope. Under the steep slope foundation, due to the steep cross slope of the ground and the uneven variation of the base geological and topographical conditions, under the action of load and water, the steep slope embankment is very prone to slide and other damages. In order to prevent the slope from collapsing and keep it stable, it is necessary to build a retaining structure for the slope on the outside of the steep slope. Retaining wall is the most commonly used slope retaining structure in engineering construction. It is mainly used to support embankment filling or natural slope soil, prevent filling or soil deformation and instability, and bear the lateral soil pressure of soil.

The retaining walls commonly used in steep slope foundation embankments mainly include gravity retaining walls and pile-slab retaining walls. The gravity retaining wall maintains the stability of the retaining wall under the action of earth pressure by the gravity of the retaining wall itself, and requires a foundation with high bearing capacity for support. Therefore, a large area of continuous excavation of wide and deep foundation pits is required, and the amount of masonry is large. , The economy of the project is poor. The pile-slab retaining wall is composed of anchor piles vertically implanted into the pile holes of the foundation and a retaining plate between the piles. The part of the pile exposed to the surface is called the cantilever section, and the part embedded in the foundation is called the anchor section. Use the resistance of the pile anchorage section and the foundation soil to resist the lateral pressure of the soil to ensure the stability of the soil inside the wall. For the support and retaining of embankment on steep slope foundation, the pile anchorage section generally needs to be twice as long as the cantilever section. The large excavation depth will cause great disturbance to the steep slope foundation soil, the excavation construction of pile holes is difficult, the safety hazard is high, and the cost of the project is also greatly increased. Increase.

Contents of the invention

The first object of the present invention is to provide a beam-column slab type embankment retaining wall on a steep slope foundation. This kind of retaining wall has a large anti-overturning moment, good support effect, and is suitable for embankment support on steep slope foundations; and its excavation is convenient. , The excavation volume is small, and the project cost is low.

The technical solution adopted by the present invention to achieve its first purpose is: a beam-column slab type embankment retaining wall on a steep slope foundation, including a column and a soil retaining plate, characterized in that: the lower end of the column and the horizontal ground beam Fixedly connected at the toe of the wall, the ground beams are fixedly connected to each other through the longitudinal connecting beam at the toe of the wall, and a soil retaining board is installed in the space surrounded by the connecting beam and the column.

The second object of the present invention is to provide a method for constructing the above-mentioned beam-column-slab type embankment retaining wall on the steep slope foundation. This method can quickly and conveniently build the above-mentioned beam-column-slab type retaining wall. The excavation volume is small, the soil disturbance is small, and the supporting and retaining effect is good.

The technical solution adopted by the present invention to realize its second purpose is, a kind of construction method of the beam-column slab type embankment retaining wall on the above-mentioned steep slope foundation, its steps are:

A. Excavate the connecting beam groove longitudinally at the toe of the retaining wall; and excavate the horizontal ground beam groove to the inner side of the steep slope in the connecting beam groove;

B. Simultaneously build the formwork in the connecting beam groove and the ground beam groove, bind the steel bars, pour concrete, and construct the ground beam and the connecting beam to form a fixed connection;

C. Set up a column formwork at the wall toe of the ground beam, bind steel bars, pour concrete, and form a column fixedly connected to the ground beam;

D. Install the prefabricated retaining board in the space surrounded by the connecting beam and the column.

Compared with prior art, the beneficial effect of the present invention is:

1. When in use, fill the soil body layer by layer on the back side of the retaining board 4 (facing the inner side of the steep slope) and set the anti-filter layer. The action of the steep slope soil on the retaining plate will generate an overturning moment; while the ground beam that penetrates horizontally into the stable soil inside the steep slope and interacts with the stable soil inside will generate a strong anti-overturning force. The overall L-shaped structure of beams, connecting beams and columns can form a strong bending moment, that is, an anti-overturning moment, which can effectively prevent the overturning of the soil and maintain the stability of the retaining wall and the soil behind the wall. In a word, the anti-overturning moment of the present invention is strong, and is suitable for embankment support on steep slope foundations.

2. The existing gravity retaining wall only generates anti-overturning force by the gravity of the retaining wall itself. The gravity of the retaining wall is large, and the bearing capacity of the foundation is required to be high. In the present invention, the horizontally deep ground beam interacts with the inner stable soil body to generate anti-overturning force, and the gravity of the retaining wall itself is small, which reduces the requirement on the bearing capacity of the foundation.

3. The foundation of the gravity retaining wall needs to excavate deep and wide foundation pits longitudinally along the slope to build a large-volume and heavy-weight retaining wall. The invention only needs to excavate the connecting beam grooves longitudinally along the slope surface and excavate the ground beam grooves horizontally at intervals, the excavation amount is greatly reduced, the disturbance to the soil body is reduced, and the construction amount is also reduced. At the same time, compared with the vertical deep hole excavation of the pile plate wall anchor pile, the vertical and horizontal grooves obviously reduce the construction difficulty and safety hazards, and also reduce the construction cost.

The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

Description of drawings:

Fig. 1 is a three-dimensional structural schematic diagram of a beam-column slab retaining wall of the present invention.

FIG. 2 is a top view of FIG. 1 .

Fig. 3 is a schematic side view (sectional view) of the present invention used on a steep slope foundation.

In Fig. 3, 5 is a steep slope soil body, and 6 is a filling soil body.

detailed description:

Example

Fig. 1, Fig. 2, Fig. 3 show, a kind of embodiment of the present invention is, a kind of beam-column slab type embankment retaining wall on steep slope foundation, comprises column 3, retaining plate 4, is characterized in that: The lower end of the column 3 is fixedly connected to the horizontal ground beam 1 at the toe of the wall, and the ground beams 1 are fixedly connected to each other through the longitudinal connecting beam 2 at the toe of the wall, and the space surrounded by the connecting beam 2 and the column 3 is installed with Soil retaining board4.

The construction method of the beam-column slab type embankment retaining wall on the steep slope foundation of this example, its steps are:

A. Excavate the connecting beam groove longitudinally at the toe of the retaining wall; and excavate the horizontal ground beam groove to the inner side of the steep slope in the connecting beam groove;

B. Build formwork in the connecting beam groove and the ground beam groove at the same time, bind the steel bars, pour concrete, and construct the ground beam 1 and the connecting beam 2 that form a fixed connection;

C. Set up the column formwork at the wall toe position of the ground beam 1, bind the steel bars, pour concrete, and form the column 3 fixedly connected with the ground beam 1;

D. Install the prefabricated retaining board 4 in the space surrounded by the connecting beam 2 and the column 3 .

Claims (2)

1. the board-like embankment of the beam column on a steep slope foundation retaining wall, including column (3), breast boards (4), it is special Levy and be: the lower end of described column (3) is fixing at toe of wall with horizontal grade beam (1) to be connected, between grade beam (1) It is mutually permanently connected by the longitudinal tie-beam (2) at toe of wall, the space that tie-beam (2) and column (3) are surrounded Breast boards (4) is inside installed.

2. a construction method for the beam column board-like embankment retaining wall on the steep slope foundation described in claim 1, The steps include:

A, in barricade toe of wall position longitudinal excavation tie-beam groove；And inside abrupt slope, excavation is horizontal in connecing beam groove Grade beam groove；

B, in tie-beam groove and grade beam groove, build template, assembling reinforcement, casting concrete simultaneously, construct shape Become the fixing grade beam (1) connected and tie-beam (2)；

C, build model of the column, assembling reinforcement, casting concrete in the toe of wall position of grade beam (1), construct formation The column (3) that be connected fixing with grade beam (1)；

D, prefabricated breast boards (4) is arranged in the space that tie-beam (2) and column (3) are surrounded.