CN213267827U - Underground continuous wall - Google Patents
Underground continuous wall Download PDFInfo
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- CN213267827U CN213267827U CN202021956167.2U CN202021956167U CN213267827U CN 213267827 U CN213267827 U CN 213267827U CN 202021956167 U CN202021956167 U CN 202021956167U CN 213267827 U CN213267827 U CN 213267827U
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- karst cave
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Abstract
The utility model provides an underground continuous wall, include: the device comprises a tank body, wherein a reinforcement cage is arranged in the tank body, and a karst cave area exists in soil outside the tank body; and the isolation component is connected with the reinforcement cage, is positioned between the reinforcement cage and the karst cave area, and at least covers the karst cave area. When a karst cave area exists in the soil outside the tank body, the isolation assembly can cover the karst cave area to prevent concrete from entering the karst cave area when the concrete is poured into the tank body, so that the using amount of the concrete can be reduced, the construction cost is reduced, and the problem that the tank wall collapses due to the fact that the concrete completely enters the karst cave area after penetrating through the soil between the underground continuous wall and the karst cave area can be solved.
Description
Technical Field
The utility model relates to a foundation ditch engineering construction technical field especially relates to an underground continuous wall.
Background
Along with the continuous development of cities, the utilization rate of underground spaces is higher and higher, the construction of the enclosing structures of the underground spaces is more and more emphasized, and in various enclosing structures, the underground diaphragm wall is high in work efficiency, short in construction period, reliable in quality and high in economic benefit. The vibration is small during the construction, the noise is low, and the method is very suitable for urban construction. By combining the advantages, the underground diaphragm wall is not only used as an impermeable waterproof and deep foundation pit enclosing wall, but is used for replacing a pile foundation, an open caisson or a caisson foundation more and more, and bearing larger load. The work efficiency is higher, the construction period is shorter, the quality is more reliable, and the economic benefit is higher.
However, underground diaphragm walls are currently not suitable for construction in areas where karst caves exist for the following reasons:
1) when a karst cave area exists in soil outside the side wall of the underground continuous wall, the karst cave area can be filled after concrete pouring is finished, concrete waste can be caused if the karst cave is positioned below a bottom plate of a foundation pit, concrete waste can be caused if the karst cave is positioned above an excavation surface of the foundation pit, the problems that the building enclosure is invaded and limited and the like can be caused, and a large amount of manpower and material resources are wasted to break the invasion-limited structure subsequently.
2) When there is a cavern region at the bottom of the underground diaphragm wall, two situations arise: the first condition is that when the underground diaphragm wall is excavated, a karst cave area is found, and then concrete is required to be filled subsequently, which is not economical; the second condition is then more serious, under the condition that mud exists, not link up between the wall bottom and the solution cavity, but concrete constantly pours into in underground continuous wall, the pressure that the soil body between the wall bottom and the solution cavity receives will be bigger and bigger, pressure is the biggest when concrete pours to design elevation, because the unit weight of concrete is greater than the mud unit weight far away, it is very likely that the soil body that leads to between underground continuous wall and the solution cavity region is destroyed this moment, thereby lead to in the whole karst cave that gets into of underground continuous wall channel section interior concrete, neither mud dado nor concrete in the channel section this moment, lead to the cell wall to collapse extremely easily.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an underground continuous wall, when can preventing to pour into the concrete, the concrete gets into the problem that the concrete that the solution cavity region leads to is extravagant even underground continuous wall collapses.
In order to achieve the above object, the present invention provides an underground diaphragm wall, including:
the device comprises a tank body, wherein a reinforcement cage is arranged in the tank body, and a karst cave area exists in soil outside the tank body;
and the isolation component is connected with the reinforcement cage, is positioned between the reinforcement cage and the karst cave area, and at least covers the karst cave area.
Optionally, the karst cave region is located outside the side wall of the tank body, the isolation assembly includes an isolation plate, the isolation plate is located between the reinforcement cage and the karst cave, and the isolation plate at least covers the karst cave region.
Optionally, the isolation plate is bound and connected with the reinforcement cage.
Optionally, the partition plate completely covers the entire side wall of the reinforcement cage.
Optionally, the isolation plate is an anti-streaming iron sheet, a wood template or a steel plate.
Optionally, the thickness of the separator is between 0.5mm and 1 mm.
Optionally, the karst cave region is located below the tank body, the isolation assembly comprises a channel steel, the channel steel comprises a bottom plate and two side plates which are parallel to each other, the bottom plate is connected with the two side plates at the same side, the two side plates are respectively attached to and connected with the side wall of the steel reinforcement cage, and the bottom plate covers the bottom of the steel reinforcement cage.
Optionally, the channel steel is welded to the reinforcement cage.
Optionally, still be provided with a plurality of slip casting pipe protective sheaths on the bottom plate, slip casting pipe protective sheath by the vertical downwardly extending of bottom plate extends in the soil body, still be provided with a plurality of slip casting pipes in the steel reinforcement cage, the one end of slip casting pipe stretches into in the slip casting pipe protective sheath with to carry out the slip casting in the soil body.
Optionally, the slip casting protective sheath includes steel ring and many steel pipes, many the steel pipe is followed the circumference of steel ring distributes, and all the one end of steel pipe respectively with the steel ring is connected, and the other end is vertical to be extended downwards and is set for and intersect in same point after length.
The utility model provides an underground continuous wall, include: the device comprises a tank body, wherein a reinforcement cage is arranged in the tank body, and a karst cave area exists in soil outside the tank body; and the isolation component is connected with the reinforcement cage, is positioned between the reinforcement cage and the karst cave area, and at least covers the karst cave area. When a karst cave area exists in the soil outside the tank body, the isolation assembly can cover the karst cave area to prevent concrete from entering the karst cave area when the concrete is poured into the tank body, so that the using amount of the concrete can be reduced, the construction cost is reduced, and the problem that the tank wall collapses due to the fact that the concrete completely enters the karst cave area after penetrating through the soil between the underground continuous wall and the karst cave area can be solved.
Drawings
Fig. 1 is a schematic structural diagram of an underground diaphragm wall according to an embodiment of the present invention;
fig. 2 is a schematic structural view of an underground diaphragm wall provided by the second embodiment of the present invention;
fig. 3 is a schematic structural view of a grouting pipe protection sleeve according to a second embodiment of the present invention;
wherein the reference numerals are:
10-a tank body; 20-a reinforcement cage; 30-karst cave region; 40-an isolation component; 50-protective sleeve of grouting pipe; 51-a steel ring; 52-steel pipes; 60-grouting pipe.
Detailed Description
The following description of the embodiments of the present invention will be described in more detail with reference to the drawings. The advantages and features of the present invention will become more apparent from the following description. It should be noted that the drawings are in simplified form and are not to precise scale, and are provided for convenience and clarity in order to facilitate the description of the embodiments of the present invention.
Example one
As shown in fig. 1, the present embodiment provides an underground diaphragm wall, including:
the tank body 10 is internally provided with a reinforcement cage 20, and a karst cave area 30 exists in soil outside the tank body 10;
and the isolation assembly 40 is connected with the reinforcement cage 20, the isolation assembly 40 is positioned between the reinforcement cage 20 and the cavern region 30, and the isolation assembly 40 at least covers the cavern region 30.
Specifically, the groove body 10 is that foundation engineering adopts a groover machinery subaerial, along the peripheral axis of deep excavation engineering, under the mud dado condition, excavates a long and narrow deep groove, be provided with steel reinforcement cage 20 in the groove body 10, steel reinforcement cage 20 mainly plays tensile effect, and the compressive strength of concrete is high but tensile strength is very low, through setting up steel reinforcement cage 20 so that follow-up toward concrete placement forms reinforced concrete structure in the groove body 10.
In this embodiment, the reinforcement cage 20 includes reinforcements such as a main reinforcement and a horizontal reinforcement, and in addition, reinforcement structures such as a truss reinforcement may be further disposed in the reinforcement cage, which is not limited in this application.
In this embodiment, the karst cave region 30 is located outside the side wall of the tank body 10, and the specific position of the karst cave region 30 can be generally found by ultrasonic detection after the tank body is dug.
With reference to fig. 1, the cavern region 30 is located outside the sidewall of the tank 10, the isolation assembly 40 includes an isolation plate located between the reinforcement cage 20 and the cavern, and the isolation plate at least covers the cavern region 30. Through setting up the division board, toward when pouring concrete in the cell body 10 the division board can be extruded and hug closely the regional 30 of solution cavity, prevents effectively that the concrete from getting into the regional 30 of solution cavity to reduce the quantity of concrete, reduce construction cost.
In this embodiment, the isolation plate is bound to the reinforcement cage 20. Specifically, can set up the through-hole on the division board, then utilize the iron wire to pass the through-hole will division board and the main muscle ligature on the steel reinforcement cage 20 are firm, prevent that the division board from dropping. Of course, the partition board and the reinforcement cage 20 may be fixedly connected by other means, such as welding, but the present application is not limited thereto.
Optionally, the spacer plates completely cover the entire side walls of the reinforcement cage 20. It will be appreciated that the function of the insulation panels is primarily to prevent concrete from entering the cavern region 30 during the pouring thereof, and that it is generally only necessary to make the dimensions of the insulation panels larger than the dimensions of the cavern region 30. However, the partition plate may be made larger, and since a certain gap needs to be left between the main rib of the reinforcement cage 20 and the sidewall of the tank 10, the partition plate completely covers the entire sidewall of the reinforcement cage 20 so as to separate the reinforcement cage 20 from the sidewall of the tank 10, and at the same time, the partition plate can completely cover the sidewall of the tank 10, so that the protection effect is better.
Optionally, the isolation plate is an anti-bypass iron sheet, a wood formwork or a steel plate, which is not limited in this application.
Optionally, the thickness of the separator is between 0.5mm and 1 mm. The thickness of the isolation plate is not too large or too small, the deformation is likely to occur when the thickness is too small, the coverage area is reduced, the karst cave area 30 may not be completely shielded, and the isolation plate is not easily fixed and is likely to fall off when the thickness is too large. In this embodiment, the isolation plate is an anti-bypass iron sheet, and the thickness of the isolation plate is 0.5 mm.
Example two
Different from the first embodiment, in the second embodiment, the karst cave region 30 is located below the tank body 10, referring to fig. 2, the isolation assembly 40 includes a channel steel, the channel steel includes a bottom plate and two side plates parallel to each other, the bottom plate connects the same sides of the two side plates, the two side plates are respectively attached to and connected with the side walls of the reinforcement cage 20, and the bottom plate covers the bottom of the reinforcement cage 20.
It should be understood that when the bottom of the underground continuous wall has a cave, the part of the cave is difficult to be found by ultrasonic detection after the grooving is finished, and most seriously, when the wall bottom and the cave are not communicated under the slurry state, but when the concrete with larger volume weight is replaced, the soil layer between the bottom of the underground continuous wall and the cave is broken down. Therefore, the bottom of the steel reinforcement cage 20 is covered by the channel steel, the local stress of the bottom of the groove is converted into the whole stress, and the soil layer between the bottom of the underground continuous wall and the karst cave can be effectively prevented from being punctured when concrete is poured, so that the problem of collapse of the groove wall is avoided. In addition, the side plates of the channel steel can effectively prevent concrete from permeating into the karst cave region 30 from the peripheral soil body, so that the blocking effect is better. Of course, the isolation assembly 40 may also be formed in other configurations, such as a wooden form, which is not limited in this application.
In this embodiment, the channel-section steel with the welding of steel reinforcement cage 20 is in order to fix the channel-section steel prevents the channel-section steel is toward remove when pouring concrete in the cell body 10. It should be understood that the channel and the reinforcement cage 20 may be connected by other means such as bolting, which is not limited in this application.
Referring to fig. 2, the bottom plate is further provided with a plurality of grouting pipe protecting sleeves 50, the grouting pipe protecting sleeves 50 extend from the bottom plate vertically downward into the soil body, the reinforcement cage 20 is further provided with a plurality of grouting pipes 60, and one ends of the grouting pipes 60 extend into the grouting pipe protecting sleeves 50 to perform grouting into the soil body. The grout pipe protective sleeve 50 is used for protecting the end of the grout pipe 60 and preventing the grout pipe 60 from being damaged during the concrete pouring process.
Referring to fig. 3, the slip casting protective sleeve 50 includes a steel ring 51 and a plurality of steel pipes 52, the plurality of steel pipes 52 are distributed along the circumferential direction of the steel ring 51, and one end of each of the steel pipes 52 is connected to the steel ring 51, and the other end of each of the steel pipes extends vertically downward for a predetermined length and then meets at the same point. The slip casting protective sleeve 50 can be directly processed on site, a plurality of steel pipes 52 are respectively welded on the steel ring 51, and then the other ends of the plurality of steel pipes 52 are welded to form a cone, so that the slip casting protective sleeve can be conveniently inserted into the soil body. The molded grouting pipe protection sleeve 50 can be welded to the bottom of the channel steel and then put into the tank body 10.
And then pouring concrete into the groove body 10, and after the concrete reaches the designed strength, grouting through the grouting pipe 60 to ensure that the bottom of the underground continuous wall is compact.
To sum up, the embodiment of the utility model provides an underground continuous wall, include: the device comprises a tank body, wherein a reinforcement cage is arranged in the tank body, and a karst cave area exists in soil outside the tank body; and the isolation component is connected with the reinforcement cage, is positioned between the reinforcement cage and the karst cave area, and at least covers the karst cave area. When a karst cave area exists in the soil outside the tank body, the isolation assembly can cover the karst cave area, so that concrete can enter the karst cave area when the concrete is poured into the tank body, the using amount of the concrete can be reduced, the construction cost is reduced, and the problem that the tank wall collapses due to the fact that the concrete completely enters the karst cave area after penetrating through the soil between the underground continuous wall and the karst cave area can be solved.
The above description is only for the preferred embodiment of the present invention, and does not limit the present invention. Any technical personnel who belongs to the technical field, in the scope that does not deviate from the technical scheme of the utility model, to the technical scheme and the technical content that the utility model discloses expose do the change such as the equivalent replacement of any form or modification, all belong to the content that does not break away from the technical scheme of the utility model, still belong to within the scope of protection of the utility model.
Claims (10)
1. An underground diaphragm wall, comprising:
the device comprises a tank body, wherein a reinforcement cage is arranged in the tank body, and a karst cave area exists in soil outside the tank body;
and the isolation component is connected with the reinforcement cage, is positioned between the reinforcement cage and the karst cave area, and at least covers the karst cave area.
2. The underground continuous wall as claimed in claim 1, wherein the cavern region is located outside the side wall of the tank body, the isolation assembly comprises an isolation plate, the isolation plate is located between the reinforcement cage and the cavern, and the isolation plate at least covers the cavern region.
3. The underground diaphragm wall as claimed in claim 2, wherein said partition boards are bound to said reinforcement cage.
4. The underground continuous wall of claim 2, wherein the partition plate completely covers the entire side wall of the reinforcement cage.
5. The underground continuous wall of claim 2, wherein the isolation plate is a flow-around preventing iron sheet, a wood formwork or a steel plate.
6. The underground continuous wall of claim 2, wherein the thickness of the partition is between 0.5mm and 1 mm.
7. The underground continuous wall as claimed in claim 1, wherein the karst cave region is located below the tank body, the isolation assembly comprises a channel steel, the channel steel comprises a bottom plate and two side plates which are parallel to each other, the bottom plate is connected with the same side of the two side plates, the two side plates are respectively attached to and connected with the side walls of the reinforcement cage, and the bottom plate covers the bottom of the reinforcement cage.
8. The underground continuous wall of claim 7, wherein the channel is welded to the reinforcement cage.
9. The underground continuous wall as claimed in claim 7, wherein a plurality of grouting pipe protecting sleeves are further arranged on the bottom plate, the grouting pipe protecting sleeves extend vertically downwards from the bottom plate into the soil body, a plurality of grouting pipes are further arranged in the reinforcement cage, and one ends of the grouting pipes extend into the grouting pipe protecting sleeves to perform grouting into the soil body.
10. The underground continuous wall according to claim 9, wherein the grouting pipe protection sleeve comprises a steel ring and a plurality of steel pipes, the plurality of steel pipes are distributed along the circumferential direction of the steel ring, one end of each steel pipe is connected with the steel ring, and the other ends of the steel pipes vertically extend downwards for a set length and then meet at the same point.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021956167.2U CN213267827U (en) | 2020-09-09 | 2020-09-09 | Underground continuous wall |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021956167.2U CN213267827U (en) | 2020-09-09 | 2020-09-09 | Underground continuous wall |
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| Publication Number | Publication Date |
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| CN213267827U true CN213267827U (en) | 2021-05-25 |
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| CN202021956167.2U Active CN213267827U (en) | 2020-09-09 | 2020-09-09 | Underground continuous wall |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115369856A (en) * | 2022-08-29 | 2022-11-22 | 中铁二十局集团南方工程有限公司 | Super irrigation prevention device for underground continuous wall grooving construction |
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2020
- 2020-09-09 CN CN202021956167.2U patent/CN213267827U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115369856A (en) * | 2022-08-29 | 2022-11-22 | 中铁二十局集团南方工程有限公司 | Super irrigation prevention device for underground continuous wall grooving construction |
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