CN204530725U - A kind of anchor pole Gravity Retaining Wall for high slope rockmass - Google Patents

Abstract

An anchor gravity retaining wall for high slope support, the high slope includes a rock face forming a steep terrain, and the anchor gravity retaining wall includes a stone retaining wall close to the rock face Earth wall, the outer surface of the stone retaining wall is made with a layer of reinforced concrete slab belt with reinforced concrete rib columns; A plurality of connecting anchor rods inserted into the rock face; the reinforced concrete slab is embedded in the stone retaining wall through the connected reinforced concrete rib column and tightly connected with the stone retaining wall, and the reinforced concrete slab The concrete slabs are mixed with round steel bars; the reinforced concrete rib columns are mixed with thicker steel bars than the round steel bars; the utility model combines gravity retaining walls and anchors The rod retaining walls have their own advantages, and rationally utilize the rock behind the retaining wall to transmit part of the earth pressure on the retaining wall to the inside of the rock.

Description

An Anchor Gravity Retaining Wall for High Slope Support

technical field

The utility model relates to a bolt gravity retaining wall used for high slope support in mountainous terrain, which is mainly suitable for high slope support structures adjacent to rocky slopes in mountainous areas, and belongs to the technical field of substation engineering construction.

Background technique

Due to the limitation of mountainous terrain, the field leveling process of many substation projects often needs to "open mountains and fill valleys", resulting in the problem of high slope support. This kind of high slope problem often has three notable characteristics: 1. The free surface with a height difference greater than 10m is formed in a local area of the site; 2. The back of the slope is very close to the rock;

Currently applicable to such high slope support methods are gravity retaining walls, anchor retaining walls and reinforced earth retaining walls. The section of the gravity retaining wall is often large, and the reinforcement space required at the bottom increases with the increase of height. There is a phenomenon of re-excavating rocks to ensure the section size, which is very uneconomical for slopes with a reinforcement height greater than 10m. Anchor retaining walls are suitable for strengthening such high slopes, but the reinforcement materials are reinforced concrete, which is relatively expensive for reinforcement and has poor overall stability. Reinforced earth retaining wall filler is more convenient to obtain local materials, but the reinforced material geogrid needs to be laid to a certain length, and it is often necessary to excavate the rock steps behind it, which is very inconvenient for construction when encountering hard rock.

The results of theoretical calculation and on-site measurement show that the earth pressure on the retaining wall is relatively small due to the proximity of rocks behind it; but the height difference is large, so the stability of the retaining wall itself is very important. Under such circumstances, how to propose a new economical, reasonable and environmentally friendly reinforcement method suitable for the reinforcement of sub-type slopes according to the actual situation is particularly critical.

Contents of the invention

The purpose of this utility model is to overcome the above-mentioned deficiencies, and to provide a kind of anchor bolt used as an important connection and force transmission member for rocks and retaining walls to solve the problem of high slope support due to space constraints. Supported anchor gravity retaining wall.

The purpose of this utility model is achieved through the following technical solutions, a kind of anchor gravity retaining wall used for high slope support, the high slope includes a rock face forming a steep terrain, and the anchor The gravity retaining wall consists of a stone retaining wall next to the rock face, and on the outer face of the stone retaining wall, a layer of reinforced concrete slab belt with reinforced concrete rib columns is formed; on the said reinforced concrete slab belt A plurality of connecting anchor rods are connected obliquely inwardly through the stone retaining wall and inserted directly into the rock face.

The reinforced concrete slab is embedded in the stone retaining wall through the connected reinforced concrete rib column and closely connected with the stone retaining wall, and the reinforced concrete slab is mixed with round steel bars in the concrete slab Bar; and in the reinforced concrete rib column, the steel bar thicker than the round steel bar is mixed in the concrete rib column.

The space between the stone retaining wall and the rock surface is filled with backfill soil; the reinforced concrete slab belt is connected with a plurality of evenly distributed oblique inwards passing through the stone retaining wall and the back of the wall. A steel anchor rod that is filled with soil and inserted straight into the rock face and fastened in the rock face by pouring mortar, and the steel anchor rod is connected with a prefabricated steel bar in a reinforced concrete slab.

The reinforced concrete slab and reinforced concrete rib column are set according to the height and length of the retaining wall, the reinforced concrete slab is as wide as the stone retaining wall, and the section of the reinforced concrete rib column is length×width=600mm×300mm.

Compared with the prior art, the utility model combines the respective advantages of the gravity retaining wall and the anchor retaining wall, and rationally utilizes the rock behind the retaining wall to transmit part of the earth pressure on the retaining wall to the inside of the rock, The structure is reasonable, the force is clear, and the construction is convenient. It is suitable for the support of high slopes in mountainous areas.

Description of drawings

Fig. 1 is a structural sectional view of the utility model.

Fig. 2 is a cross-sectional view of the concrete slab of the present invention.

Fig. 3 is a sectional view of the utility model concrete rib column.

Fig. 4 is a detailed view of the connecting anchor rod of the present invention.

Detailed ways

The utility model will be described in detail below in conjunction with the accompanying drawings, that is, the embodiment: as shown in Figure 1-4, a kind of anchor gravity retaining wall for high slope support described in the utility model, wherein said The high slope includes a rock face 1 forming a steep terrain, and the anchor gravity retaining wall includes a stone retaining wall 2 close to the rock face 1, and the outer surface of the stone retaining wall 2 is formed with a layer A reinforced concrete slab 4 with a reinforced concrete rib column 3; connected to the reinforced concrete slab 4 are a plurality of connecting anchors 5 that pass obliquely inwardly through the stone retaining wall 2 and are directly inserted into the rock face 1 .

As shown in the figure, the reinforced concrete slab 4 is embedded in the stone retaining wall 2 through the connected reinforced concrete rib column 3 and is closely connected with the stone retaining wall 2, and the reinforced concrete slab 4 is A round steel bar 42 is mixed in the concrete slab 41 ; and in the reinforced concrete rib column 3 , a steel bar 32 thicker than the round steel bar is mixed in the concrete rib column 31 .

The space between the stone retaining wall 2 and the rock surface 1 described in the utility model is filled with the backfill soil 6; Build the retaining wall 2, fill the back of the wall 6, insert directly into the rock face 1 and fasten the connecting anchor rod 5 in the rock face 1 by pouring mortar, and the connecting anchor rod 5 is connected with the reinforced concrete slab strip 4 Prefabricated reinforcement bars 42 are connected.

The reinforced concrete slab 4 and the reinforced concrete rib column 3 described in the utility model are arranged according to the height and length of the retaining wall, the reinforced concrete slab 4 is as wide as the stone retaining wall 2, and the section of the reinforced concrete rib column 3 is Length X width = 600mm X 300mm; the connecting bolt 5 is inserted into the rock face 1 and fastened in the rock face 1 by pouring mortar

The anchor gravity retaining wall described in the utility model is manufactured by the following method:

a) Construction of stone retaining walls, reinforced concrete slab strips and rib columns:

The construction of the stone retaining wall should be carried out according to the elevation. Firstly, the bottom mortar block stone should be constructed, and then the first reinforced concrete slab and rib column should be constructed. It is fully connected with the rib column to form the overall force; when constructing this part, pay special attention to the accuracy of the position and angle of the steel bars for the pre-embedded connecting anchors;

b) Drilling and grouting of rock bolt holes:

Before drilling, the position of the steel anchor should be accurately measured. After the drilling is completed, use a steel pipe or rubber tube as a conduit, one end is connected to the pressure pump, and the other end is sent to the bottom at the same time as the steel anchor; put the stirred Inject the mortar into the bottom of the drilled hole, pour outward from the bottom of the hole, and gradually pull out the grouted pipe to the hole; during the process of pulling out the pipe, ensure that the pipe mouth is always buried in the mortar, so that all the water and air in the hole Extrude out of the hole to ensure the quality of grouting;

c) Connection of steel anchors:

The mortar strength of the anchor hole meets the design requirements. After the back of the wall of the previous layer is filled with soil to the anchor hole position of this layer, the non-anchor anchor of this layer is connected with the anchor rod of the anchor section and the pre-embedded connecting steel bar of the wall to avoid affecting The compaction of the backfill of the wall; when connecting, use clamps at both ends of the anchor rod of the non-anchor section to apply tension between the wall and the anchor rod of the anchor section, so as to ensure that the anchor rod of the non-anchor section is straight and straight after the connection is completed. under stress.

In the step b), before drilling, while accurately measuring the position of the anchor rod, set up a firm angle bracket to facilitate the smooth completion of the drilling; after the drilling is completed, the inner diameter of the catheter used is 28-32mm and the outer diameter is not greater than 45mm; extubation During the process, it should be ensured that the nozzle is always buried in the mortar, so that all the water and air in the bolt hole can be squeezed out of the hole to ensure the quality of grouting.

The utility model can also include the anti-corrosion of the connecting anchor, specifically: the anti-corrosion of the connecting anchor should be strictly in accordance with the design requirements on the exposed end of the anchor section anchor, the non-anchor section anchor, the wall pre-embedded connection steel bars and between them Anti-rust construction should be done at the joints of the joints, and the soil can be filled only after passing the inspection.

The utility model has been applied in the high slope support project of the 220kV surrounding soil substation.

Claims (4)

1. the anchor pole Gravity Retaining Wall for high slope rockmass, described high slope comprises the rock face forming mountain terrain, it is characterized in that described anchor pole Gravity Retaining Wall comprises the stone built retaining wall of an adjacent rock face, the lateral surface of this stone built retaining wall is shaped with the steel concrete strip of one deck with steel concrete rib post; Described steel concrete strip is connected with oblique in enter in rock face through stone built retaining wall, straight cutting many connect anchor poles.

2. the anchor pole Gravity Retaining Wall for high slope rockmass according to claim 1, it is characterized in that in described steel concrete strip by the steel concrete rib post be connected be embedded in stone built retaining wall with stone built retaining wall compact siro spinning technology, and described steel concrete strip is that hybrid junction has round steel rib in concrete strip; And be that hybrid junction has the reinforcement bar thicker than round steel rib in concrete rib post at described steel concrete rib post.

3. the anchor pole Gravity Retaining Wall for high slope rockmass according to claim 1 and 2, is characterized in that having filled up in the space between described stone built retaining wall and rock face wall and carries on the back and banket; Described steel concrete strip is connected with uniform many oblique in banket through stone built retaining wall, the wall back of the body and straight cutting enters the steel anchor rod be fastened in rock face and by mortar injection in rock face, and described steel anchor rod is connected with reinforcement bar prefabricated in steel concrete strip.

4. the anchor pole Gravity Retaining Wall for high slope rockmass according to claim 3, it is characterized in that described steel concrete strip and steel concrete rib post arrange according to the height of barricade and length, steel concrete strip and stone built retaining wall with wide, the cross section of steel concrete rib post be long X wide=600mmX300mm; Described steel anchor rod to be inserted in rock face and is fastened in rock face by mortar injection.