CN112609731A - Flexible permeable cutting retaining wall and construction method - Google Patents
Flexible permeable cutting retaining wall and construction method Download PDFInfo
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- CN112609731A CN112609731A CN202011638401.1A CN202011638401A CN112609731A CN 112609731 A CN112609731 A CN 112609731A CN 202011638401 A CN202011638401 A CN 202011638401A CN 112609731 A CN112609731 A CN 112609731A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/02—Retaining or protecting walls
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Abstract
The invention discloses a flexible permeable cutting retaining wall and a construction method thereof, wherein the flexible permeable cutting retaining wall comprises a wall body arranged on the outer side of a supporting side slope and a drainage ditch arranged at a certain distance from the supporting side slope; a waterproof cushion layer is arranged between the drainage ditch and the slope toe of the supporting side slope, and the wall body is arranged on the waterproof cushion layer; the support side slope is internally and obliquely provided with a drain pipe, and the drain pipe extends into the wall body; the wall body is formed by piling framework type steel bar gabions; the construction method comprises the following steps that S1, according to the arrangement trend of the retaining side slopes, the wall is constructed in a segmented mode in the longitudinal direction; constructing a waterproof cushion layer; s2 construction of a drain pipe; s3 building a stiff skeleton; s4, stacking and building a reinforced gabion in the framework to form a wall body; the flexible permeable cutting retaining wall is formed by piling up skeleton type steel bar gabions, is small in construction difficulty, short in construction period, low in construction cost, good in water permeability, sequential in appearance difference and good in visual effect, and is also beneficial to later-stage greening recovery.
Description
Technical Field
The invention relates to the technical field of civil and architectural engineering and supporting structures, in particular to a flexible permeable cutting retaining wall and a construction method.
Background
The cut retaining wall is also called a retaining wall, and refers to a structure for supporting roadbed filling soil or hillside soil and preventing the filling soil or the soil from deforming and destabilizing. The cut retaining wall supporting excavation slope belongs to a passive supporting, and the acting load is soil pressure or landslide thrust.
The traditional cutting retaining wall is of a reinforced concrete structure and comprises a foundation pit (101) and a reinforced concrete retaining wall (102) arranged in the foundation pit as shown in figure 1, wherein foundation pit backfilling lime soil (103), a water-resisting layer (104), a reverse filter layer (105), backfilling sand gravel (106) and roadbed filling (107) are sequentially arranged between the retaining wall and the retaining side slope from bottom to top; a drainage channel (108) is arranged in the retaining wall, and the water-stop layer plays a water-stop role and prevents the water on the upper layer from flowing to the bottom of the retaining wall to influence the stability of the retaining wall; the inverted filter layer is used for preventing the drainage channel from being blocked. During construction, a foundation pit needs to be excavated, in order to meet the requirement of the embedding depth of the retaining wall, the foundation pit is generally lower than the slope toe by 1-2 m, namely, the height of the excavation side slope is increased in a phase change manner, the side slope is not stable, and the construction difficulty is high and the cost is high. Meanwhile, the conventional retaining wall back needs to be provided with a reverse filter layer and a water-resisting layer according to design requirements, but the width of the materials of the two parts is only 30-50 cm, the construction difficulty is high due to the limitation of the site size. On-site investigation finds that the phenomenon that the cut retaining wall back inverted filter layer is not constructed according to design sometimes occurs, so that wall back underground water is difficult to discharge through a drainage channel of a wall body, the underground water level rises to cause soil pressure increase, and the retaining wall topples and the side slope is unstable. In conclusion, the cutting retaining wall of the traditional reinforced concrete structure has the disadvantages of high construction difficulty, long construction period, high construction cost, complex construction process and poor water permeability; and because the inverted filter layer and the water-resisting layer are limited by the site, the construction is not easy and is gradually ignored by the construction side, thereby bringing about the problems of the overturning of the retaining wall and the instability of the side slope.
Disclosure of Invention
Aiming at the technical problems of high construction difficulty, long construction period and poor water permeability of the cutting retaining wall of the reinforced concrete structure, the invention provides the flexible water permeable cutting retaining wall and the construction method, so that the construction difficulty is reduced, the construction period is shortened, and the water permeability of the wall is improved.
The technical scheme adopted by the invention is as follows: a flexible permeable cutting retaining wall comprises a wall body arranged on the outer side of a supporting retaining side slope and a drainage ditch arranged at a certain distance from the supporting retaining side slope; a waterproof cushion layer is arranged between the drainage ditch and the slope toe of the supporting side slope, and the wall body is arranged on the waterproof cushion layer; the support side slope is internally and obliquely provided with a drain pipe, and the drain pipe extends into the wall body; the wall body is formed by stacking skeleton type steel reinforcement gabions. The framework type reinforced gabion wall body and the traditional reinforced concrete retaining wall are both gravity retaining walls, and soil bodies are balanced by means of the gravity of the wall body or the retaining wall; the weight of the framework type reinforced gabion wall can be made to be consistent with that of the reinforced concrete retaining wall, namely the framework type reinforced gabion wall and the reinforced concrete retaining wall have the same effect of balancing soil. On the premise of consistent soil retaining effect, the whole wall body can be drained and permeated; compared with the traditional reinforced concrete retaining wall which can only drain water through a limited drainage channel, the reinforced concrete retaining wall has better water permeability, can drain underground water in the retaining side slope in time, and avoids the situations of soil pressure increase, retaining wall overturn and side slope instability caused by the rise of the underground water level in the retaining side slope. In addition, the framework type reinforcement gabion wall body is formed by piling, so that the construction difficulty is low, the construction period is short, and the construction cost is low.
Furthermore, the drain pipe is a PE hard pipe, has the characteristics of long service life, light weight, convenience and quickness in installation, good flexibility, strong shock and distortion resistance, corrosion resistance, low manufacturing cost and the like, and is very suitable for being used in a retaining side slope.
Further, the gradient of the drain pipe is 5-8 degrees. The slope of the drain pipe is too large, the projection area of the drain pipe is smaller, and the permeable area is smaller; the slope of the drain pipe is too small, so that the effect of diversion cannot be achieved. Therefore, the gradient of the drain pipe is preferably 5-8 degrees, and the water permeable area of the drain pipe is maximized on the premise of ensuring the diversion.
Furthermore, one end of the drain pipe, which is far away from the wall body, is uniformly provided with water seepage holes. The water seepage holes increase the water seepage area of the soil body and the water drainage pipe, and guarantee that underground water in the soil body can be drained in time.
Further, waterproof geotextile is arranged on the outer side of the drain pipe. The waterproof geotextile can prevent the water seepage hole from being blocked, and the circulation efficiency of underground water is improved.
Further, the framework type steel bar gabion comprises a stiff framework matched with the shape of the wall body and a steel bar gabion arranged in the stiff framework; the stiff framework comprises a cross brace, a vertical brace and an X-shaped diagonal brace connected between the cross brace and the vertical brace; the cross-sectional area of the stiff skeleton is a parallelogram. The steel bar reinforced concrete frame is simple in structure and convenient to operate, and only corresponding parts need to be manufactured in a factory, the stiff skeleton is spliced after the parts arrive at the site, and the steel bar reinforced concrete is built in the stiff skeleton in a stacking mode, so that the steel bar reinforced concrete frame is simple to manufacture, convenient to splice and quick to construct.
Furthermore, the stiff framework is made of galvanized steel pipes. The rigidity and the strength of the stiff framework are ensured, meanwhile, the galvanization can prevent the pipe fitting from being oxidized, corroded and rusted, and the service life of the pipe fitting is prolonged.
Furthermore, the reinforcing bar gabion is filled with gravels; the top of the wall body is provided with a triangular internal corner area, and the internal corner area is composed of broken stones. The gravel filled between the reinforcement gabions can play a role in reinforcing the reinforcement gabions, so that the reinforcement gabions are attached more tightly, the functions of weighting the wall body and reducing the volume of the wall body are also played, and the stability of the wall body can be enhanced. In addition, because the steel bar stone dragon is square, no matter how the wall body is piled up, the top of the wall body cannot be triangular matched with the shape of the wall body, and therefore the triangular internal corner area is piled up through broken stones and kept consistent with the wall body.
A construction method is used for constructing the flexible permeable cutting retaining wall and comprises the following steps:
s1, constructing the wall body in a longitudinal subsection mode according to the arrangement trend of the retaining side slopes; constructing a waterproof cushion layer;
s2, constructing a drain pipe;
s3, building a stiff framework;
s4, stacking and building a reinforced gabion in the framework to form a wall body;
and S5, repeating the steps S1-S4 until all the segmented walls are constructed.
Further, the step S1 specifically includes: leveling the constructed pavement, draining accumulated water in the pavement, and pouring C15 concrete on the pavement;
the step S2 specifically includes: drilling a hole on the side wall of the retaining side slope, and embedding the PE hard pipe into the retaining side slope in an inclined manner through the hole, wherein the gradient of the PE hard pipe is 5-8 degrees; one end of the PE hard pipe, which is far away from the wall body, is uniformly provided with water seepage holes; waterproof geotextile is wrapped outside the PE hard pipe;
the step S3 specifically includes: the transverse supports, the vertical supports and the inclined supports are overlapped to form a stiff framework matched with the external dimension of the wall body, and the transverse supports, the vertical supports and the inclined supports are connected through standard joints by bolts; the transverse support, the vertical support and the inclined support are all made of galvanized steel pipes;
the step S4 specifically includes: the steel bar stone dragons are piled up layer by layer from bottom to top, and the steel bar stone dragons are connected in parallel; filling gaps among the steel bar stone dragons with broken stones; the triangular internal corner area is filled on the top of the wall body by using broken stones. In the whole construction process of the invention, the construction process is simple, the material is easy to manufacture, the construction period is short, the construction cost is low, and the water permeability is stronger.
The invention has the beneficial effects that:
1. the flexible permeable cutting retaining wall is formed by piling up framework type steel bar gabions, and has the advantages of small construction difficulty, short construction period and low construction cost; and the appearance of the gabion retaining wall is uneven and ordered, the visual effect is better, and the later greening recovery is also facilitated.
2. Compared with the traditional reinforced concrete retaining wall, the reinforced concrete retaining wall has better water permeability, can discharge underground water in the retaining side slope in time, and avoids the situations of soil pressure increase, retaining wall overturning and side slope instability caused by the rise of underground water level in the retaining side slope.
3. The gradient of the drain pipe is preferably 5-8 degrees, and the water permeable area of the drain pipe is maximized on the premise of ensuring the flow guidance.
4. According to the invention, the waterproof geotextile is arranged on the outer side of the drain pipe, so that the water seepage hole can be prevented from being blocked, and the circulation efficiency of underground water is improved.
Drawings
Fig. 1 is a schematic structural diagram of a cutting retaining wall in the prior art.
Fig. 2 is a schematic structural diagram of the first embodiment.
Fig. 3 is a schematic structural diagram of the second embodiment.
Labeled as: 101. a foundation pit; 102. retaining walls; 103. backfilling lime soil in the foundation pit; 104. a water barrier layer; 105. a reverse filtering layer; 106. backfilling sand gravel; 107. filling soil into the roadbed; 108. a drainage channel; 109. a pavement;
1. supporting a retaining side slope; 2. a drainage ditch; 3. a waterproof cushion layer; 4. a drain pipe; 5. a steel reinforcement gabion; 6. a reentrant region; 7. a cross brace; 8. vertically supporting; 9. bracing; 10. a pavement; 11. flexible steel wire net.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
Example one
Referring to fig. 2, the flexible permeable cutting retaining wall of the present invention comprises a wall body arranged outside a supporting side slope 1 and a drainage ditch 2 arranged at a certain distance from the supporting side slope; a waterproof cushion layer 3 is arranged between the drainage ditch 2 and the slope foot of the supporting side slope 1, and the wall body is arranged on the waterproof cushion layer; the support side slope is internally and obliquely provided with a drain pipe 4 which extends into the wall body; the wall body is formed by stacking skeleton type steel reinforcement gabions. The framework type reinforced gabion wall body and the traditional reinforced concrete retaining wall are both gravity retaining walls, and soil bodies are balanced by means of the gravity of the wall body or the retaining wall; the weight of the framework type reinforced gabion wall can be made to be consistent with that of the reinforced concrete retaining wall, namely the framework type reinforced gabion wall and the reinforced concrete retaining wall have the same effect of balancing soil. On the premise of consistent soil retaining effect, the whole wall body can be drained and permeated; compared with the traditional reinforced concrete retaining wall which can only drain water through a limited drainage channel, the reinforced concrete retaining wall has better water permeability, can drain underground water in the retaining side slope in time, and avoids the situations of soil pressure increase, retaining wall overturn and side slope instability caused by the rise of the underground water level in the retaining side slope. In addition, the framework type reinforcement gabion wall body is formed by piling, so that the construction difficulty is low, the construction period is short, and the construction cost is low.
The drain pipe 4 of this embodiment is the PE hard tube, has long service life, light in weight, simple installation, good pliability, strong shock resistance distortion, anticorrosive and cost low grade characteristics, uses in being applicable to very much the fender side slope.
Referring to fig. 2, the slope of the drain pipe 4 is 7 degrees, the slope of the drain pipe is too large, the projection area is small, and the permeable area is small; the slope of the drain pipe is too small, so that the effect of diversion cannot be achieved. Therefore, the gradient of the drain pipe is preferably 7 degrees, and the water permeable area of the drain pipe is maximized on the premise of ensuring the flow guidance.
In this embodiment, the drain pipe is provided with a water seepage hole (not shown in the figure) at the end far away from the wall body. The water seepage holes increase the water seepage area of the soil body and the water drainage pipe, and guarantee that underground water in the soil body can be drained in time.
The present embodiment is provided with a waterproof geotextile (not shown in the figure) on the outer side of the drain pipe. The waterproof geotextile can prevent the water seepage hole from being blocked, and the circulation efficiency of underground water is improved.
Referring to fig. 2, the framework type reinforcement gabion of the present embodiment includes a stiff framework matching the shape of the wall body and a reinforcement gabion 5 arranged in the stiff framework; the stiff framework comprises a cross brace 7, a vertical brace 8 and an X-shaped diagonal brace 9 connected between the cross brace and the vertical brace; the cross-sectional area of the stiff skeleton is a parallelogram. The steel bar reinforced concrete frame is simple in structure and convenient to operate, and only corresponding parts need to be manufactured in a factory, the stiff skeleton is spliced after the parts arrive at the site, and the steel bar reinforced concrete is built in the stiff skeleton in a stacking mode, so that the steel bar reinforced concrete frame is simple to manufacture, convenient to splice and quick to construct.
The stiffness framework of the embodiment is made of galvanized steel pipes, so that the rigidity and strength of the stiffness framework are ensured, meanwhile, the galvanization can prevent the pipe fittings from being oxidized, resistant to corrosion and rust, and the service life of the pipe fittings is prolonged.
Referring to fig. 2, in this embodiment, the reinforcement gabion is filled with crushed stones; the top of the wall body is provided with a triangular internal corner area 6, and the internal corner area 6 is composed of broken stones. The gravel filled between the reinforcement gabions can play a role in reinforcing the reinforcement gabions, so that the reinforcement gabions are attached more tightly, the functions of weighting the wall body and reducing the volume of the wall body are also played, and the stability of the wall body can be enhanced. In addition, because the steel bar stone dragon is square, no matter how the wall body is piled up, the top of the wall body cannot be triangular matched with the shape of the wall body, and therefore the triangular internal corner area is piled up through broken stones and kept consistent with the wall body.
Example two
Referring to fig. 3, the difference between this embodiment and the first embodiment is that the framework-type steel reinforcement gabion has a different structure, the cross section of the stiff skeleton of the framework-type steel reinforcement gabion is square, the steel reinforcement gabion is a flexible steel wire mesh 11 arranged on the surface of the stiff skeleton, the flexible steel wire mesh divides the stiff skeleton into a plurality of steel reinforcement gabions, and the flexible steel wire mesh is filled with broken stones. The structure is simple, the operation is convenient, corresponding parts are manufactured in a factory and are installed after arriving at a site, the manufacture is simple, and the construction is rapid.
EXAMPLE III
A construction method is used for constructing the flexible water permeable cutting retaining wall in the first embodiment and comprises the following steps:
s1, constructing the wall body in a longitudinal subsection mode according to the arrangement trend of the retaining side slopes; constructing a waterproof cushion layer; the method specifically comprises the following steps: leveling the constructed road surface 10, draining the accumulated water in the road surface 10, and pouring C15 concrete on the road surface
S2, constructing a drain pipe 4; the method specifically comprises the following steps: drilling a hole on the side wall of the retaining side slope 1, and embedding a PE hard pipe into the retaining side slope in an inclined manner through the hole, wherein the gradient of the PE hard pipe is 5-8 degrees; one end of the PE hard pipe, which is far away from the wall body, is uniformly provided with water seepage holes; waterproof geotextile is wrapped outside the PE hard pipe;
s3, building a stiff framework; the method specifically comprises the following steps: the transverse support 7, the vertical support 8 and the inclined support 9 are connected in a lap joint mode to form a stiff framework matched with the external dimension of the wall body, and the transverse support, the vertical support and the inclined support are connected through standard joints by bolts; the transverse support, the vertical support and the inclined support are all made of galvanized steel pipes;
s4, stacking and building a reinforced gabion in the framework to form a wall body; the method specifically comprises the following steps: the steel bar stone dragons are piled up layer by layer from bottom to top, and the steel bar stone dragons are connected in parallel; filling gaps among the steel bar stone dragons with broken stones; the triangular inside corner region 6 is filled on top of the wall using crushed stone.
And S5, repeating the steps S1-S4 until all the segmented walls are constructed.
The flexible permeable cutting retaining wall is formed by piling up framework type steel bar gabions, and has the advantages of small construction difficulty, short construction period and low construction cost; the appearance of the gabion retaining wall is uneven and ordered, the visual effect is better, and the later greening recovery is facilitated; in addition, in the whole construction process of the invention, the construction process is simple, the material is easy to manufacture, the construction period is short, the construction cost is low, and the water permeability is stronger.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A flexible permeable cutting retaining wall comprises a wall body arranged on the outer side of a supporting side slope (1) and a drainage ditch (2) arranged at a certain distance from the supporting side slope; it is characterized in that the preparation method is characterized in that,
a waterproof cushion layer (3) is arranged between the drainage ditch (2) and the slope foot of the retaining side slope (1), and the wall body is arranged on the waterproof cushion layer;
the support side slope is internally and obliquely provided with a drain pipe (4) which extends into the wall body;
the wall body is formed by stacking skeleton type steel reinforcement gabions.
2. A flexible water permeable cutting wall according to claim 1, wherein the drainage pipe (4) is a PE hard pipe.
3. A flexible water permeable cutting wall according to claim 1, characterized in that the slope of the drainage pipe (4) is 5 ° to 8 °.
4. The flexible permeable cutting retaining wall as claimed in claim 1, wherein the end of the drainage pipe away from the wall is uniformly provided with water seepage holes.
5. The flexible water permeable cutting retaining wall according to claim 4, wherein a waterproof geotextile is arranged outside the drainage pipe.
6. The flexible permeable cutting retaining wall according to any one of claims 1 to 5, wherein the skeleton type reinforcement gabion comprises a stiff skeleton matched with the shape of the wall body and reinforcement gabions (5) arranged in the stiff skeleton; the stiff framework comprises a cross brace (7), a vertical brace (8) and an X-shaped diagonal brace (9) connected between the cross brace and the vertical brace; the cross-sectional area of the stiff skeleton is a parallelogram.
7. The flexible water permeable cutting retaining wall of claim 6, wherein the stiff skeleton is made of galvanized steel pipe.
8. The flexible water permeable cutting retaining wall according to claim 6, wherein the reinforcement gabion is filled with crushed stones; the top of the wall body is provided with a triangular internal corner area (6), and the internal corner area (6) is composed of broken stones.
9. A construction method for constructing the flexible permeable cutting retaining wall according to claim 8, comprising the steps of:
s1, constructing the wall body in a longitudinal subsection mode according to the arrangement trend of the retaining side slopes; constructing a waterproof cushion layer;
s2, constructing a drain pipe (4);
s3, building a stiff framework;
s4, stacking and building a reinforced gabion in the framework to form a wall body;
and S5, repeating the steps S1-S4 until all the segmented walls are constructed.
10. A construction method according to claim 9,
the step S1 specifically includes: leveling the constructed pavement (10), draining accumulated water in the pavement (10), and pouring C15 concrete on the pavement;
the step S2 specifically includes: drilling a hole on the side wall of the retaining side slope (1), and embedding a PE hard pipe into the retaining side slope through the hole in an inclined manner, wherein the gradient of the PE hard pipe is 5-8 degrees; one end of the PE hard pipe, which is far away from the wall body, is uniformly provided with water seepage holes; waterproof geotextile is wrapped outside the PE hard pipe;
the step S3 specifically includes: the transverse support (7), the vertical support (8) and the inclined support (9) are overlapped to form a stiff framework matched with the external dimension of the wall body, and the transverse support, the vertical support and the inclined support are connected through standard joints by bolts; the transverse support, the vertical support and the inclined support are all made of galvanized steel pipes;
the step S4 specifically includes: the steel bar stone dragons are piled up layer by layer from bottom to top, and the steel bar stone dragons are connected in parallel; filling gaps among the steel bar stone dragons with broken stones; and filling a triangular internal corner area (6) at the top of the wall body by using broken stones.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011638401.1A CN112609731A (en) | 2020-12-31 | 2020-12-31 | Flexible permeable cutting retaining wall and construction method |
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| CN202011638401.1A CN112609731A (en) | 2020-12-31 | 2020-12-31 | Flexible permeable cutting retaining wall and construction method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115478547A (en) * | 2022-10-17 | 2022-12-16 | 中国二十冶集团有限公司 | Method for arranging bridge and culvert conical slope gabion retaining wall |
-
2020
- 2020-12-31 CN CN202011638401.1A patent/CN112609731A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115478547A (en) * | 2022-10-17 | 2022-12-16 | 中国二十冶集团有限公司 | Method for arranging bridge and culvert conical slope gabion retaining wall |
| CN115478547B (en) * | 2022-10-17 | 2023-06-20 | 中国二十冶集团有限公司 | Setting method of bridge-culvert conical slope gabion retaining wall |
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