CN109972654A - A J-type anchor high retaining wall and its construction method - Google Patents

Abstract

The invention relates to the technical field of subgrade engineering, and discloses a J-shaped anchor high retaining wall and a construction method thereof. The high retaining wall is arranged outside the high embankment of a rock slope where sliding occurs, and includes a J-shaped plate wall and several anchors. A number of anchor rods obliquely pass through the J-shaped plate wall and are inserted into the stable rock slope. Through the structural optimization design and the use of small construction equipment, the embankment is successfully reinforced and repaired without destroying the stability of the existing slope; after The rationally designed high-grade wall solves the unfavorable conditions in the construction of mountainous roads such as narrow site, close to rivers or buildings, unfavorable surrounding environment, and the inability of large construction equipment to carry out work, and can still successfully complete the reinforcement and repair task.

Description

A J-type anchor high retaining wall and its construction method

technical field

The invention relates to the technical field of subgrade engineering, in particular to a high retaining wall with J-shaped anchor rods and a construction method thereof.

Background technique

With the development of new rural road construction in mountainous areas of our country, due to the constraints of small sites, proximity to rivers or buildings, unfavorable surrounding environment, and the inability of large construction equipment to carry out work and other factors, it is often necessary to re-repair the collapsed high embankment. There is an urgent need for a structure that no longer destroys the existing slope, and can work with manual and simple equipment to facilitate construction.

CN 104762978 A discloses "A Bolt Gravity Retaining Wall for High Slope Support and Its Manufacturing Method". A grouted stone retaining wall is used near the rock slope for preliminary support, and then reinforced concrete protection is used. Face walls and anchors for further protection. Its shape is I-type, which is suitable for the situation where the base is rock and the foundation has a high bearing capacity and the road surface needs to be widened.

CN 208328983 U discloses "a kind of heightening structure of rock foundation road retaining wall". It is to add an L-shaped retaining wall on top of the original I-type gravity retaining wall. The bottom plate of the L-shaped retaining wall is located inside the roadbed, and the back pressure of the roadbed soil load prevents the retaining wall from overturning.

CN 103266622 B invented "L-shaped retaining wall structure with spanning special-shaped buttress". The upper part adopts L-shaped buttress retaining wall, and the lower part is equipped with anti-slide piles. It is mainly suitable for narrow spaces with buildings around.

Due to the high rocky slope of the road that is close to the river and has already slipped, the disturbance to the existing slope must be reduced. The existing technology has not provided an effective and reliable support method. The existing problems are:

1. Disturbance to the slope will cause sliding during construction;

2. The foundation of the retaining wall sinks due to insufficient bearing capacity of the foundation;

3. The overturning resistance of the retaining wall does not meet the requirements;

4. If the retaining wall is too high, it will be difficult to construct, requiring large-scale construction equipment and high cost.

Contents of the invention

The object of the present invention is to provide a J-bolt high retaining wall and its construction method, which can carry out embankment reinforcement and repair smoothly under the premise of using small construction equipment without destroying the stability of the existing slope.

In order to achieve the above-mentioned technical purpose and achieve the above-mentioned technical effect, the present invention discloses a J-bolt high retaining wall and its construction method. The high retaining wall is arranged outside the high embankment of the rock slope where sliding occurs, and includes a J-shaped plate wall And several bolts, the lower part of the J-shaped plate wall is the foundation seat, which is located above the bedrock or dense and stable stratum, the upper part of the J-shaped plate wall is in contact with the rock slope, and several anchors obliquely pass through the J-shaped plate wall and insert into the rock in the slope.

Further, when the height of the J-shaped panel wall is less than 10m, it is set as a first-class panel wall.

Further, when the height of the J-shaped panel wall is greater than 10m, it is set as a secondary or multi-level panel wall.

Preferably, when the height of the J-shaped slab wall is greater than 10m and it is necessary to set up two or more slab walls, in order to increase the anti-overturning stability of the retaining wall and facilitate the construction of the upper part, it is also necessary to increase the rubble concrete counterweight, and the rubble concrete counterweight Set on the outer side of the first-level wall of the J-shaped panel wall.

Among them, the J-shaped panel wall is provided with drainage holes every 3m, and expansion joints are set every 15m.

Among them, the contact gap between the J-shaped slab wall and the rock slope is filled with self-compacting fluid state stable soil or layered backfilling graded sand and gravel.

Preferably, the rubble concrete replacement foundation is also included, and the rubble concrete replacement foundation is arranged under the base of the J-shaped slab wall foundation.

A construction method for a J-bolt high retaining wall, the specific construction steps are as follows:

(1) Clean up the slope first, and clean up the dangerous rocks on the slope;

(2) The foundation trench is excavated to the top of the rock formation, and the foundation is replaced with rubble concrete to stabilize the foundation;

(3) Construction of the foundation seat of the J-shaped panel wall;

(4) Construction of the upper retaining wall of the J-shaped panel wall. As the retaining wall is gradually increased, anchor holes are reserved. The J-shaped panel wall is provided with drainage holes at intervals of 3m and expansion joints at intervals of 15m; and wall joints are filled. The wall joints are filled with self-compacting fluid state stable soil or layered backfill with graded sand and gravel;

(5) To construct the anchor rod of the first-level wall, the anchor rod is inserted obliquely through the J-shaped plate wall and the weathered and broken rock into the stable rock slope, and the J-shaped plate wall and the anchor rod form a stable whole through on-site concrete pouring;

(6) Pavement paving is completed.

Preferably, it also includes the construction of rubble concrete counterweight and graded walls. When the height of the J-shaped panel wall is greater than 10m, it is implemented in two or more stages. Add rubble concrete counterweight to the position, and then construct graded walls and anchors according to steps (4) and (5).

The present invention has the following beneficial effects:

1. The present invention utilizes small-scale construction equipment through structural optimization design, and successfully carries out embankment reinforcement and repair under the premise of not destroying the stability of the existing slope.

2. The rationally designed high-grade wall solves the unfavorable conditions in the construction of mountainous roads such as narrow site, close to rivers or buildings, unfavorable surrounding environment, and the inability of large-scale construction equipment to carry out work, and can still successfully complete the reinforcement and repair task.

Description of drawings

Figure 1 is a schematic structural view of Embodiment 1 of the present invention, wherein the height of the J-shaped panel wall is less than 10 meters.

Fig. 2 is a schematic structural diagram of Embodiment 2 of the present invention, wherein the height of the J-shaped panel wall is greater than 10 meters.

Explanation of main component symbols:

1: J-shaped slab wall, 2: Anchor rod, 3: Replacement foundation, 4: Rubble concrete counterweight, 5: Wall joint filling, 6: Drain hole, 7: Rock weathered surface, 8: Stabilized rock, 9 : Weathered broken rock.

Detailed ways

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

Example 1

The invention discloses a J-shaped bolt high retaining wall and a construction method thereof. When the height of the J-shaped plate wall is less than 10m, it is a repair structure for repairing the collapse of a high embankment. The specific structure is shown in Figure 1, and the specific construction steps are as follows :

(1) Clean up the slope first, and clean up the dangerous rocks on the slope;

(2) Excavate the foundation trench to the top of the rock formation, and replace the foundation 3 with rubble concrete to stabilize the foundation;

(3) Construction of the foundation seat of the J-shaped panel wall 1;

(4) Construction of the upper retaining wall of the J-shaped panel wall 1. As the retaining wall is gradually increased, anchor holes are reserved. The J-shaped panel wall 1 is provided with drainage holes 6 at intervals of 3m and expansion joints at intervals of 15m; Filling 5, wall joint filling 5 is self-compacting fluid state stable soil or layered backfilling graded sand and gravel;

(5) To construct the anchor 2 of the first-level wall, insert the anchor 2 obliquely through the J-shaped plate wall 1 and the weathered and broken rock 9 into the slope of the stable rock 8, and the J-shaped plate wall 1 and the anchor 2 pass through the site Concrete pouring forms a stable whole;

(6) Pavement paving is completed.

Example 2

The invention discloses a J-shaped anchor high retaining wall and its construction method. When the height of the J-shaped plate wall is greater than 10m (the height of the J-shaped plate wall is 18 meters in this embodiment as an example), the collapse of the high embankment can be repaired. The repair structure, the specific structure is shown in Figure 2, and the specific construction steps are as follows:

(1) Clean up the slope first, and clean up the dangerous rocks on the slope;

(2) Excavate the foundation trench to the top of the rock formation, and replace the foundation 3 with rubble concrete to stabilize the foundation;

(3) Construction of the foundation seat of the J-shaped panel wall 1;

(4) Construction of the upper retaining wall of the J-shaped panel wall 1. As the retaining wall is gradually increased, anchor holes are reserved. The J-shaped panel wall 1 is provided with drainage holes 6 at intervals of 3m and expansion joints at intervals of 15m; Filling 5, wall joint filling 5 is self-compacting fluid state stable soil or layered backfilling graded sand and gravel;

(5) To construct the anchor 2 of the first-level wall, insert the anchor 2 obliquely through the J-shaped plate wall 1 and the weathered and broken rock 9 into the slope of the stable rock 8, and the J-shaped plate wall 1 and the anchor 2 pass through the site Concrete pouring forms a stable whole;

(6) Add rubble concrete counterweight 4 on the outer side of the bottom primary wall to form a platform to facilitate the construction of the secondary wall;

(7) The height of the J-shaped plate wall 1 is 18m, and it is implemented in two stages (9m each), and the secondary wall 1 and the anchor rod 2 are constructed according to (4) and (5) steps;

(8) Pavement paving is completed.

The above is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed in the present invention can easily think of changes or Replacement should be covered within the protection scope of the present invention.

Claims (9)

1. a kind of high barricade of J-type anchor pole, the high barricade is set on the outside of the high embankment of the rock slope for occurring sliding, feature It is, includes J-type panel wall and several anchor poles, seat based on the J-type panel wall lower part is located at basement rock or closely knit stabilization Above stratum, the J-type panel wall top is in contact with rock slope, and several anchor poles is board-like obliquely through J-type Wall straight cutting enters in stable rock slope.

2. a kind of high barricade of J-type anchor pole as described in claim 1, it is characterised in that: the J-type panel wall height is less than Level-one panel wall is set as when 10m.

3. a kind of high barricade of J-type anchor pole as described in claim 1, it is characterised in that: the J-type panel wall height is greater than Second level or multistage panel wall are set as when 10m.

4. a kind of high barricade of J-type anchor pole as claimed in claim 3, it is characterised in that: it further include having rubble concrete counterweight, it is described Rubble concrete counterweight is set to the level-one wall outer fix of J-type panel wall.

5. a kind of high barricade of J-type anchor pole as described in claim 1, it is characterised in that: the J-type panel wall is set at interval of 3m Drainage hole is set, expansion joint is set at interval of 15m.

6. a kind of high barricade of J-type anchor pole as described in claim 1, it is characterised in that: the J-type panel wall and rock slope Contact gap filling have self-compaction fluid stable soil or back-filling in layers graded sand and stone.

7. a kind of high barricade of J-type anchor pole as described in claim 1, it is characterised in that: it further include thering is rubble concrete to change to fill out basis, institute The rubble concrete stated, which changes, fills out basis instrument below J-type panel wall foundation base.

8. a kind of construction method of high barricade of J-type anchor pole as described in claim 1-7, it is characterised in that: described specifically applies Steps are as follows for work:

(1) slope surface cleaning is carried out first, and slope surface danger stone is cleaned out；

(2) foundation trench is excavated at the top of rock stratum, is changed using rubble concrete and is filled out the firm substrate in basis；

(3) foundation base of construction J-type panel wall；

(4) the top barricade of construction J-type panel wall, as barricade gradually increases reserved anchor hole, J-type panel wall is arranged at interval of 3m Expansion joint is arranged at interval of 15m in drainage hole；And carry out wall seam and fill, wall seam is filled as self-compaction fluid stable soil or is layered back Fill out graded sand and stone；

(5) anchor pole of construction level-one wall, enters stable rock side obliquely through J-type panel wall and detrition rock straight cutting for anchor pole In slope, J-type panel wall and anchor pole pass through live concrete placings and form a stable entirety；

(6) road surfacing is completed.

9. a kind of construction method of the high barricade of J-type anchor pole as claimed in claim 8, it is characterised in that: further include having rubble concrete The construction of counterweight and classification wall divides two-stage or multistage implementation, constructs and complete in step 5 when J-type panel wall height is greater than 10m On the basis of, in bottom, level-one wall outer fix increases rubble concrete counterweight, then according to (4), (5) step construction classification wall and anchor Bar.