CN212452757U

CN212452757U - Retaining wall drainage structures

Info

Publication number: CN212452757U
Application number: CN202020955125.0U
Authority: CN
Inventors: 马缤辉; 李卓; 胡志勇; 蔡凯; 陈秋南; 贺成斌; 陈炳初; 雷勇
Original assignee: Hunan University of Science and Technology
Current assignee: Hunan University of Science and Technology
Priority date: 2020-05-30
Filing date: 2020-05-30
Publication date: 2021-02-02
Anticipated expiration: 2030-05-30

Abstract

The utility model discloses a retaining wall drainage structures, including retaining wall, couple, geotechnological check room add the muscle layer, the geotechnological cloth that permeates water, longitudinal drainage ditch, drain pipe, the wall body of retaining wall adopts multilayer concrete placement to form, and the retaining wall back is banked up, is provided with multilayer geotechnological check room and adds the muscle layer in the banked up, and geotechnological check room adds the muscle layer and hangs at the retaining wall back through the couple hook, the retaining wall openly sets up longitudinal drainage ditch, drain pipe one end stretches into the retaining wall back and sets up the geotechnological cloth that permeates water, and the drain pipe other end stretches to the positive longitudinal drainage ditch department of retaining wall. The utility model can drain the water of the soil body behind the wall, prevent the surface water from seeping to form accumulated water behind the wall, and prevent the wall body from being protected from extra hydrostatic pressure; the expansion pressure of the cohesive soil filler caused by the increase of the water content can be eliminated; the frost heaving pressure of the filler in seasonal frost heaving areas can be reduced; compared with the existing retaining wall drainage structure, the retaining wall drainage structure has the advantages of good water permeability, higher strength, better drainage performance and the like.

Description

Retaining wall drainage structures

Technical Field

The utility model relates to a retaining wall, in particular to retaining wall drainage structures.

Background

In the field of civil engineering, accidents such as overturning, collapsing and the like caused by unsmooth drainage of a retaining wall emerge endlessly, and the accidents are caused by the fact that a conventional drainage structure is easy to break or block due to construction quality problems, water is gathered behind the wall to form hydrostatic pressure, the load behind the wall is increased, meanwhile, the shear strength of filling soil behind the wall is reduced due to the existence of the water, and the possibility of instability of a soil body behind the wall is further aggravated. Therefore, how to seek a new way to solve the drainage problem of the retaining wall becomes the key of the retaining wall engineering quality assurance.

Disclosure of Invention

In order to solve the technical problem, the utility model provides a simple structure, safe and reliable's retaining wall drainage structures.

The utility model provides a technical scheme of above-mentioned problem is: the utility model provides a retaining wall drainage structure, includes retaining wall, couple, geotechnological check room adds muscle layer, the geotechnological cloth that permeates water, longitudinal drainage ditch, drain pipe, and the wall body of retaining wall adopts multilayer concrete placement to form, and the retaining wall back is filled earth, is provided with multilayer geotechnological check room and adds muscle layer in the fill, and geotechnological check room adds muscle layer and hangs at the retaining wall back through the couple hook, the retaining wall openly sets up the longitudinal drainage ditch, drain pipe one end is stretched into the retaining wall back and is set up the geotechnological cloth that permeates water, and the drain pipe other end stretches to the positive longitudinal drainage ditch department of retaining wall.

In the retaining wall drainage structure, the geocell reinforcement layer is a composite structure body formed by the geocell and gravel soil, and a certain gradient is preset in the geocell reinforcement layer.

In the retaining wall drainage structure, the permeable geotextile layers are arranged between the upper end surface and the lower end surface of the geocell reinforcement layer and the filling soil

In the retaining wall drainage structure, the geocell is a three-dimensional reticular cell structure formed by welding HDPE (high-density polyethylene) sheets.

In the retaining wall drainage structure, the permeable geotextile is a permeable geosynthetic material formed by needling or weaving synthetic fibers.

The beneficial effects of the utility model reside in that: the utility model discloses a novel retaining wall drainage structure consisting of a hook, a geocell reinforcement layer, permeable geotextile, a longitudinal drainage ditch and a PVC drainage pipe, which can drain the water of the soil body behind the wall, prevent the surface water from seeping into the accumulated water behind the wall, and prevent the wall body from being protected from extra hydrostatic pressure; the expansion pressure of the cohesive soil filler caused by the increase of the water content can be eliminated; the frost heaving pressure of the filler in seasonal frost heaving areas can be reduced. Compared with the existing retaining wall drainage structure, the retaining wall drainage structure has the advantages of good water permeability, higher strength, better drainage performance and the like. Therefore, the utility model is suitable for a to the higher engineering of retaining wall drainage requirement, or the more area of precipitation, also be applicable equally to the retaining wall engineering in the area that has the frost heaving phenomenon.

Drawings

Fig. 1 is the schematic diagram of the retaining wall drainage structure of the utility model.

Fig. 2 is a schematic structural view of the geocell reinforcement layer in fig. 1.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and examples.

As shown in fig. 1 and 2, the retaining wall drainage structure comprises a retaining wall 6, a hook 1, a geocell reinforcement layer 2, a permeable geotextile 3, a longitudinal drainage ditch 4 and a drainage pipe 5, wherein the wall body of the retaining wall 6 is formed by pouring multilayer concrete, the back of the retaining wall 6 is filled with soil 9, the multilayer geocell reinforcement layer 2 is arranged in the filled soil 9, the geocell reinforcement layer 2 is hooked on the back of the retaining wall 6 through the hook 1, and a permeable geotextile layer 10 is arranged between the upper end surface and the lower end surface of the geocell reinforcement layer 2 and the filled soil 9. Retaining wall 6 openly sets up longitudinal drainage ditch 4, 5 one end of drain pipe stretches into the 6 backs of retaining wall and sets up geotechnological cloth 3 that permeates water, and the 5 other ends of drain pipe stretch to the 6 positive longitudinal drainage ditches 4 departments of retaining wall.

The geocell adds the rib layer 2 for the geocell 7 adds the compound structure that has powerful side direction restriction that gravel soil 8 constitutes, has higher side direction restriction, and the shape of preapring for an unfavorable turn of events, the bearing capacity and the dispersed load effect of effectual reinforcing retaining wall 6. Because the diaphragm of the geocell 7 is provided with the round hole, and the reinforced layer 2 of the geocell is preset with a certain gradient, the water can flow out along the secondary structure layer, and the drainage of the structure is relatively better.

The hook 1 is anchored on the back of the retaining wall 6 and acts on the geocell reinforcement layer 2, so that the geocell 7 is anchored on the retaining wall 6, the retaining wall 6 and the geocell reinforcement layer 2 are connected into a whole, and the integrity of the structure is enhanced.

The drain pipe 5 is produced by using sanitary polyvinyl chloride (PVC) resin as a main raw material, adding a proper amount of a stabilizer, a lubricant, a filler, a toner and the like, performing extrusion molding by a plastic extruder and injection molding by an injection molding machine, and performing cooling, curing, shaping, inspection, packaging and other processes.

The geocell 7 is a three-dimensional mesh cell structure formed by welding reinforced HDPE (high-density polyethylene) sheets with high strength. Generally by ultrasonic needle welding. Some of them punch holes in the membrane sheet as required by the engineering. The utility model discloses a structure of geotechnological check room 7 with pervious concrete constitutes the composite construction body that has powerful side direction restriction, has beaten the round hole on the diaphragm because of geotechnological check room 7, so the drainage of this structure is also better relatively.

The longitudinal drainage ditch 4 is a ditch which is arranged for ensuring that the water flow of surface runoff, the geocell reinforcement layer 2 and the drainage pipe 5 can be drained away in time.

The geotextile 3 is a water-permeable geosynthetic material formed by needling or weaving synthetic fibers and is arranged at one end of the drain pipe 5, so that the drain pipe 5 is prevented from being blocked by soil while water flow is ensured to be discharged along the drain pipe 5.

A construction method of a retaining wall drainage structure comprises the following steps:

1) excavating the foundation to a designed elevation, excavating a longitudinal drainage ditch, carrying out foundation treatment, removing redundant slag soil of the foundation and ensuring that foundation pouring is carried out smoothly;

2) erecting a template at the foundation position and pouring foundation slab concrete, and reserving a pouring concrete hole and embedding embedded steel bars when erecting the template;

3) laying a first layer of wall concrete template, reserving concrete pouring holes, embedded steel bars and hooks when the template is supported, pouring wall concrete, laying a drain pipe every 5m, wherein the gradient of the drain pipe is 4-6%, one end of the drain pipe extends into the back of the retaining wall and is sealed by permeable geotextile, and the other end of the drain pipe extends into a drainage ditch of the retaining wall and is used for reinforcing drainage of the retaining wall;

4) filling soil after filling a first layer of wall, arranging a geocell reinforcement layer at the top of the filling soil, wherein the filling soil of each layer is not more than 2m, laying a permeable geotextile layer firstly after the filling soil of the layer is finished, laying a geocell reinforcement layer secondly, laying a permeable geotextile layer secondly, forming a composite structure to wrap the geocell reinforcement layer, preventing gravel soil from being washed away by water flow, and hooking the gravel soil on a hook which is pre-embedded at the back of the wall before;

5) laying a second layer of wall concrete template, reserving concrete pouring holes, embedded steel bars and hooks when supporting the template, and pouring wall concrete; laying a drain pipe every 5m, wherein the gradient is 4-6%, one end of the drain pipe extends into the back of the retaining wall and is sealed by permeable geotextile, and the other end of the drain pipe extends into a drainage ditch of the retaining wall and is used for reinforcing drainage of the retaining wall;

6) filling soil after filling a second layer of wall, arranging a geocell reinforcement layer at the top of the filling soil, wherein the filling soil of each layer is not more than 2m, laying a permeable geotextile layer firstly after the filling soil of the layer is finished, laying a geocell reinforcement layer secondly, laying a permeable geotextile layer secondly, forming a structure-conforming wrapped geocell reinforcement layer, preventing gravel soil from being washed away by water flow, and hooking the gravel soil on a hook which is pre-embedded at the back of the wall before;

7) laying a third layer of wall concrete template, reserving concrete pouring holes, embedded steel bars and hooks when the template is supported, and pouring wall concrete; laying a drain pipe every 5m, wherein the gradient is 4-6%, one end of the drain pipe extends into the back of the retaining wall and is sealed by permeable geotextile, and the other end of the drain pipe extends into a drainage ditch of the retaining wall and is used for reinforcing drainage of the retaining wall;

8) filling soil after filling a third layer of wall, wherein a geocell reinforcement layer is arranged at the top of the filling soil, the filling soil of each layer is not more than 2m, when the filling soil of the layer is finished, a permeable geotextile layer is laid firstly, then a geocell reinforcement layer is laid, and then a permeable geotextile layer is laid, so that a geotextile cell reinforcement layer which conforms to the structure is formed, gravel soil is prevented from being washed away by water flow, and the gravel soil is hooked on a hook which is pre-embedded on the back of the wall;

9) and (5) constructing in sequence until the height of the retaining wall reaches the design height.

Claims

1. The utility model provides a retaining wall drainage structures which characterized in that: including retaining wall, couple, geotechnological check room add muscle layer, geotechnological cloth, longitudinal drainage ditch, drain pipe that permeates water, the wall body of retaining wall adopts multilayer concrete placement to form, and the retaining wall back is filled earth, is provided with multilayer geotechnological check room and adds the muscle layer in the filled earth, and geotechnological check room adds the muscle layer and hangs at the retaining wall back through the couple hook, the retaining wall openly sets up the longitudinal drainage ditch, drain pipe one end stretches into the retaining wall back and sets up geotechnological cloth that permeates water, and the drain pipe other end stretches to the positive longitudinal drainage ditch department of retaining wall.

2. A retaining wall drainage structure according to claim 1, characterized in that: the geocell reinforcement layer is a composite structure body formed by geocell sand gravel soil, and the geocell reinforcement layer is preset with a slope.

3. A retaining wall drainage structure according to claim 1, characterized in that: and a permeable geotextile layer is arranged between the upper end surface and the lower end surface of the geocell reinforcement layer and the filling.

4. A retaining wall drainage structure according to claim 1, characterized in that: the geocell is a three-dimensional mesh cell structure formed by welding HDPE sheets.

5. A retaining wall drainage structure according to claim 1, characterized in that: the water-permeable geotextile is a water-permeable geosynthetic material formed by needling or weaving synthetic fibers.