CN114837234A

CN114837234A - Karst refuse dump foundation treatment structure

Info

Publication number: CN114837234A
Application number: CN202210698542.5A
Authority: CN
Inventors: 马艳; 马鑫泽; 陈芳平; 周科; 张虎; 唐为民; 王四戌
Original assignee: Guizhou Transportation Planning Survey and Design Academe Co Ltd
Current assignee: Guizhou Transportation Planning Survey and Design Academe Co Ltd
Priority date: 2022-06-20
Filing date: 2022-06-20
Publication date: 2022-08-02

Abstract

The invention discloses a karst waste dump foundation treatment structure, which comprises an annular retaining wall I, wherein the annular retaining wall I is arranged around a water falling hole or a pit, an annular retaining wall II is arranged around the retaining wall I, the retaining wall I and the retaining wall II form a water collecting well, a plurality of inclined water inlet holes are arranged at intervals at the middle upper part on the retaining wall II, the water inlet holes are low ends towards the water collecting well end, inclined water outlet holes are arranged at the lower part on the retaining wall II, the water outlet holes are high ends towards the water collecting well end, the low ends of the water outlet holes are connected with inclined drainage blind ditches, and the low ends of the drainage blind ditches are connected with a sewage collecting pool outside the waste dump; the structure can avoid the pollution to the karst underground water and can not cause the karst to sink.

Description

Karst refuse dump foundation treatment structure

Technical Field

The invention relates to a karst refuse dump, in particular to a foundation treatment structure of the karst refuse dump.

Background

Karst (also called karst) is a general name of a soluble rock distribution area mainly containing carbonates, and water (particularly underground water) has a comprehensive geological effect mainly containing erosion on rocks and generates various phenomena. Carbonate rocks in China are widely distributed, particularly in southwest regions, surface karst depressions and troughs develop, when a dumping site is arranged in the karst depressions and the troughs, the karst depressions and the troughs often meet water falling holes or pits, and the karst collapse can be caused by failure of proper treatment measures, so that reasonable treatment measures must be taken to ensure the stability of karst foundations.

The field of the refuse dump in engineering construction can meet different shapes of water falling holes or pit elimination, the most common treatment measure at present is landfill and grouting reinforcement, but the treatment method is not suitable for the water falling holes or pit elimination communicated with underground rivers.

Disclosure of Invention

In view of the above, the present invention aims to provide a karst dump foundation treatment structure, which can avoid the pollution to the karst groundwater and can not cause the karst collapse.

The purpose of the invention is realized by the following technical scheme:

the utility model provides a karst refuse dump ground treatment structure, includes annular barricade one, and annular barricade one encircles the hole of falling into water or the pit setting disappears, barricade one is encircleed outward and is provided with annular barricade two, barricade one forms the sump pit with two rooms of barricade, the well upper portion interval on the barricade two is equipped with the inlet opening of a plurality of slopes, the inlet opening is the low side towards the sump pit end, the lower part on the barricade two is equipped with the apopore of slope, the apopore is high-end towards the sump pit end, the apopore low side meets with the drainage blind ditch of slope, the low side of drainage blind ditch links to each other with the sewage collecting pit in the refuse dump outside.

Furthermore, an impermeable material layer is arranged on one outer side of the retaining wall.

Further, the drainage french drain includes the ditch body, the ditch body forms on the waste of refuse dump, the bottom of ditch body is equipped with the prevention of seepage basis, and the middle part is filled with coarse grain material, coarse grain material top covers has the roof, there is the infiltration layer of outside-in one-way infiltration on ditch body both sides.

Further, the top plate is a grouted stone sheet top plate.

Further, the anti-seepage foundation is a reinforced concrete foundation.

Furthermore, the height of the top surface of the second retaining wall is higher than that of the waste dump and lower than that of the first retaining wall.

Furthermore, the high end of the water inlet hole is wrapped with a permeable geotextile, a gravel reverse filter layer is arranged outside the permeable geotextile, and a cement layer is paved on the waste of the refuse dump on the bottom surface of the gravel reverse filter layer.

Furthermore, the two ends of the drainage blind ditch are wrapped with permeable geotextiles.

And furthermore, the bottoms of the first retaining wall, the second retaining wall and the water collecting well are all of reinforced concrete structures.

The invention has the beneficial effects that:

according to the karst refuse dump foundation treatment structure, the first retaining wall intercepts water in the refuse dump area, and isolates and protects the water falling hole or the pit, the water collecting well collects the water in the refuse dump area and discharges the water into the sewage collecting tank outside the refuse dump through the drainage blind ditch, so that the refuse dump underground water is prevented from entering the water falling hole or the pit to pollute the karst underground water, and meanwhile, the karst collapse caused by the fact that the karst space inside the refuse dump is sealed under the positive and negative pressure action is also avoided; the structure is convenient for later observation and maintenance, and has simple structure and low cost.

Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof.

Drawings

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the accompanying drawings, in which:

FIG. 1 is a top view of the present invention in use.

Fig. 2 is a schematic view of the arrangement of the first retaining wall and the second retaining wall in fig. 1.

Fig. 3 is a perspective view of the retaining wall in fig. 1.

Fig. 4 is a cross-sectional view of the retaining wall of fig. 1.

Fig. 5 is a perspective view of the retaining wall shown in fig. 1.

Fig. 6 is a cross-sectional view of the retaining wall of fig. 1.

FIG. 7 is a schematic view of the connection between the blind drain and the retaining wall in FIG. 1.

FIG. 8 is a sectional view of the drain blind ditch.

Detailed Description

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be understood that the preferred embodiments are only for illustrating the present invention, and are not intended to limit the scope of the present invention.

As shown in fig. 1-8, a karst soil-discharging field foundation treatment structure, which solves the karst problems of water falling hole or pit elimination and the like when a soil discharging field is arranged in a karst depression or valley, comprises an annular reinforced concrete retaining wall I1, wherein the annular retaining wall I1 is arranged around the water falling hole 5 or pit elimination, an annular reinforced concrete retaining wall II 3 is arranged around the retaining wall I1, a water collecting well 2 is formed between the retaining wall I1 and the retaining wall II 3, the bottom of the water collecting well 2 is also of a reinforced concrete structure, a plurality of inclined water inlet holes 301 are arranged at intervals at the middle upper part of the retaining wall II 3, the water inlet holes 301 are at the lower end towards the water collecting well 2, so that underground water in the soil discharging field can enter the water collecting well 2 from the water inlet holes 301, the inclined water outlet holes 302 are at the higher end towards the water collecting well 2, so that water in the water collecting well 2 can be discharged from the water outlet holes 301, the lower end of the 302 is connected with an inclined blind ditch 4, the low side of drainage french drain 4 links to each other with the sewage catch pit 9 in the waste dump outside, drainage french drain 4 is discharged water of apopore 302 to sewage catch pit 9, sewage catch pit 9 sets up the bealock department at low ground or trough, the sewage that sewage catch pit 9 was collected can be handled by sewage treatment system, sewage catch pit 9 is equipped with the barricade three towards the waste dump side, be equipped with the outlet of a plurality of slopes on the barricade, the outlet is the low side towards sewage catch pit 9 end.

The outer side of the first retaining wall 1 is provided with an impermeable material layer 101, so that the first retaining wall can be prevented from being permeated by sewage.

The drainage blind ditch 4 comprises a ditch body, the ditch body is formed on the waste of a refuse dump, the bottom of the ditch body is provided with an anti-seepage foundation 404, the middle part of the ditch body is filled with a coarse-grained material 403, a top plate 401 covers the coarse-grained material 403, two sides of the ditch body are provided with water seepage layers 10 for one-way water seepage from outside to inside, the water seepage layers 10 are one-way water-permeable geotextiles, namely, the underground water of the refuse dump on two sides of a side ditch can enter the drainage blind ditch 4 from the water seepage layers 10, and the purpose of arranging the top plate 401 is to prevent the waste from entering the coarse-grained material 403 to block the drainage blind ditch 4.

The roof 401 is a grouted stone slab.

The impermeable foundation 404 is a reinforced concrete foundation.

The top surface of the second retaining wall 3 is higher than the height of the waste of the refuse dump and lower than the height of the first retaining wall 1, and the top surface of the second retaining wall 3 is lower than the height of the first retaining wall 1 so as to avoid the problem that leachate of the refuse dump crosses the first retaining wall 1 to enter the water falling hole 5 or the pit elimination under extreme conditions and pollute karst groundwater.

The high-end parcel of inlet opening 301 has permeable geotechnological cloth 6, and permeable geotechnological cloth 6 peripheral hardware gravel reversed filter 7, has laid the clay layer 8 on the discarded object of 7 bottom surfaces refuse dumps of gravel reversed filter, can avoid the discarded object to get into sump pit 2.

The drainage blind ditch 4 both ends all wrap up the geotechnological cloth 6 that permeates water, can avoid the discarded object to get into sewage collecting tank 9.

The underground water of the refuse dump enters the water collecting well 2 through the water inlet hole 301, is intercepted by the retaining wall 1 at the position of the water collecting well 2, and then is discharged to the sewage collecting tank 9 through the water outlet hole 302 and the drainage blind ditch 4.

The structure can isolate and protect the water falling hole or the pit, is convenient for discharging the slope water of the karst depression or the trough dump, avoids the pollution to karst underground water, and simultaneously avoids the phenomenon that the karst collapse is induced by positive and negative pressure of the inner karst space due to the sealing of the dump.

A method for realizing a karst dump foundation treatment structure comprises the following steps:

a. and calculating a flood level elevation according to the catchment area of the waste dump field area, and determining the height of the retaining wall I1, the height of the water collecting well 2 and the size of the drainage blind ditch 4 according to the flood level elevation.

b. The method comprises the following steps of cleaning a site, excavating a foundation pit, placing a retaining wall I1 on a waterproof layer, and performing waterproof treatment on the foundation, wherein the foundation is a permeable layer.

c. Binding a reinforcing steel bar of the first retaining wall 1, installing a template of the first retaining wall 1, pouring concrete, and coating an impermeable material 101 on the peripheral surface of the first retaining wall 1.

d. Binding the reinforcing steel bars of the water collecting well 2, installing the template of the water collecting well 2, and pouring concrete.

e. Reserving a PVC pipe water inlet hole 301 channel on the water collecting well 2 in the step d, wrapping the high end of the water inlet hole 301 with a permeable geotextile 6, arranging a gravel reverse filter layer 7 outside the permeable geotextile 6, and paving a cement layer 8 on the waste on the bottom surface of the gravel reverse filter layer 7.

f. Reserving a water outlet hole 302 channel on the d-step water collecting well 2, adjusting the height of the water outlet hole 302 according to the actual terrain condition, and wrapping the lower end of the water outlet hole 302 with the permeable geotextile 6.

g. And (3) paving a drainage blind ditch 4 at the base of the waste dump field, wherein the bottom of the drainage blind ditch 4 is an anti-seepage foundation 404, the top of the drainage blind ditch is a grouted stone sheet top plate, the middle of the drainage blind ditch is filled with permeable block stones, and two side surfaces of the drainage blind ditch 4 are provided with one-way permeable geotextiles.

h. And a sewage collecting tank 9 is built at the lower end of the drainage blind ditch 4, leachate in the water collecting well 2 is discharged into the sewage collecting tank 9 through the drainage blind ditch 4, and the leachate is treated by a sewage treatment system and discharged after reaching the standard when the leachate does not meet the discharge requirement.

Finally, the above embodiments are only intended to illustrate the technical solutions of the present invention and not to limit the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered by the claims of the present invention.

Claims

1. The utility model provides a karst refuse dump ground base processing structure which characterized in that: including annular barricade (1), annular barricade (1) encircles water falling hole (5) or the pit setting that disappears, barricade (1) outer loop is around being provided with annular barricade two (3), form sump pit (2) between barricade (1) and barricade two (3), well upper portion interval on barricade two (3) is equipped with inlet opening (301) of a plurality of slopes, inlet opening (301) are held for the low side towards sump pit (2), the lower part on barricade two (3) is equipped with apopore (302) of slope, apopore (302) are held for the high end towards sump pit (2), apopore (302) low side meets with the drainage french drain (4) of slope, the low side of drainage french drain (4) links to each other with sewage collecting pit (9) in the dump outside.

2. The karst dump foundation treatment structure according to claim 1, characterized in that: and an impermeable material layer (101) is arranged on the outer side of the first retaining wall (1).

3. The karst dump foundation treatment structure according to claim 1, characterized in that: drainage french drain (4) are including the ditch body, the ditch body forms on the waste of refuse dump, the bottom of ditch body is equipped with prevention of seepage basis (404), middle part and is filled with coarse grain material (403), coarse grain material (403) top cover has roof (401), there is infiltration layer (10) of outside-in one-way infiltration in ditch body both sides.

4. The karst dump foundation treatment structure according to claim 3, wherein: the top plate (401) is a grouted stone sheet top plate.

5. The karst dump foundation treatment structure according to claim 3, wherein: the impermeable foundation (404) is a reinforced concrete foundation.

6. The karst dump foundation treatment structure according to claim 1, characterized in that: the top surface of the second retaining wall (3) is higher than the height of the waste in the waste dump and lower than the height of the first retaining wall (1).

7. The karst dump foundation treatment structure according to claim 1, characterized in that: the high-end parcel of inlet opening (301) has geotechnological cloth (6) that permeates water, geotechnological cloth (6) that permeates water peripheral hardware gravel reversed filter (7), and the thing of abandonment of gravel reversed filter (7) bottom surface refuse dump is spread and is had clay layer (8).

8. The karst dump foundation treatment structure according to claim 1, characterized in that: and both ends of the drainage blind ditch (4) are wrapped with permeable geotextiles (6).

9. The karst dump foundation treatment structure according to any one of claims 1 to 8, wherein: the bottoms of the first retaining wall (1), the second retaining wall (3) and the water collecting well (2) are all of reinforced concrete structures.