CN211621548U

CN211621548U - Karst foundation local adds thick liquid reinforcing apparatus

Info

Publication number: CN211621548U
Application number: CN201921958913.9U
Authority: CN
Inventors: 周兵
Original assignee: Zhejiang Putuo Foundation Base Engineering Co ltd
Current assignee: Zhejiang Putuo Foundation Base Engineering Co ltd
Priority date: 2019-11-13
Filing date: 2019-11-13
Publication date: 2020-10-02
Anticipated expiration: 2029-11-13

Abstract

The utility model relates to a karst ground part adds thick liquid reinforcing apparatus, including slip casting pipe and bag, the top of slip casting pipe is equipped with the slip casting mouth, and the bottom is equipped with the slip casting drill bit, the lower part of slip casting pipe pass above-mentioned bag inside and with bag between sealing connection, the slip casting pipe is equipped with a plurality of grout outlet on being located the body in the bag, the cover is equipped with the pipe cap that is used for external slip casting machine on the body of slip casting mouth department. The utility model discloses a bag formula slip casting is treated consolidating regional peripheral formation and is only starched the wall in the solution cavity, treats consolidating regional cavity with the solution cavity again and packs closely knit, has simple structure, and strong adaptability consolidates effectually, can locally consolidate, practices thrift construction cost, reduces beneficial effect such as the construction degree of difficulty.

Description

Karst foundation local adds thick liquid reinforcing apparatus

Technical Field

The utility model relates to a karst ground reinforcing apparatus especially relates to a karst ground local reinforcement that adds thick liquid belongs to construction technical field.

Background

The rapid development of the economy of China drives the development pace of engineering construction, and engineering construction sites are distributed all over the country. However, the karst system in China is extremely developed, the distribution area of the karst is wide, and the total area exceeds 200 ten thousand square kilometers, so that a large number of construction projects in construction or planning can not pass through the karst development area. Karst areas often develop karst caves and soil caves, which have adverse effects on engineering construction, cause foundation settlement, and cause structural deformation of buildings, even collapse in severe cases, so that the buildings are damaged, and great threats are brought to production and life of people. Therefore, the treatment of soil-dissolving hole foundation is under the current situation of high importance in all social circles.

Because people neglect karst development, the karst (soil) cavern change is not obvious in a short period, people are easy to paralyze thoughts, and the safety is realized by mistake when engineering construction is carried out on the karst. However, when the cavity roof is affected by additional stress, the cavity roof soil can collapse and expand, and finally the cavity roof is unstable and collapsed, so that the safety of the building is endangered. The method is a common treatment method, wherein the grouting material is injected through the drill hole and is filled with the karst cave, the grouting material comprises cement mortar, cement paste, cement concrete, sand and the like, the cement mortar, the cement paste and the cement concrete can form a conical supporting point below the drill hole, and the grout is solidified and is cemented with the rock-soil body for a certain time to form an integral body so as to achieve a high-strength solidified body and play a role in supporting and reinforcing the karst cave. However, the karst cave is not easy to form a high-strength consolidation body due to the influence of underground water in the karst region, the stability after forming is poor, the treatment construction amount is large and the cost is high if the karst cave is completely filled, and if local filling is adopted, the filling boundary is difficult to control, and the loss of cement mortar, cement paste, cement concrete and the like is easy to cause.

SUMMERY OF THE UTILITY MODEL

The utility model discloses mainly there is the reinforcement effect not good to current solution cavity reinforcement technology, the slip casting scope is great, not only increased the construction degree of difficulty, construction cost's problem has still been improved, a karst ground local adds thick liquid reinforcing apparatus, treat to consolidate regional peripheral formation grout stopping wall in the solution cavity through bag formula slip casting, treat to consolidate regional cavity packing with the solution cavity again closely knit, cut off solution cavity hole body and groundwater, the contact of solution gap water, with the safety of the stability of assurance ground and building, ground reinforcement is effectual, the later stage harm is few, but also many rig simultaneous workings, the time limit for a project is shortened, construction cost is saved, the construction degree of difficulty is reduced.

The purpose of the utility model is mainly realized by the following scheme:

the utility model provides a karst foundation local adds thick liquid reinforcing apparatus, includes slip casting pipe and bag, the top of slip casting pipe is equipped with the slip casting mouth, and the bottom is equipped with the slip casting drill bit, the lower part of slip casting pipe pass above-mentioned bag inside and with between the bag sealing connection, the body that the slip casting pipe is located the bag is equipped with a plurality of grout outlet on, the cover is equipped with the pipe cap that is used for external slip casting machine on the body of slip casting mouth department.

By adopting the technical scheme, the grouting wall is formed on the periphery of the area to be reinforced of the karst cave through the bag grouting, then the cavity of the area to be reinforced of the karst cave is tightly filled, and the connection between the karst cave body and the underground water and the water in the karst cave is cut off, so that the stability of the foundation and the safety of the building are ensured, the foundation reinforcement effect is good, the local reinforcement can be realized, and the construction cost is saved. The bag can be made of waterproof materials such as woven bags and the like, so that the filled cement mortar is prevented from flowing outwards; reverse osmosis corrosion-resistant cloth is preferred.

Preferably, the grouting pipe comprises a grouting section at the lower part and a landfill section at the upper part, the grouting section and the landfill section are connected through a connecting piece, the grout outlet is positioned on the grouting section, the landfill section is composed of a plurality of short pipes, and adjacent short pipes are connected through connecting pieces.

By adopting the technical scheme, the landfill section consists of the short pipes, and the length of the grouting pipe can be increased by increasing the number of the short pipes in a deeper area of the karst cave, so that the grouting pipe meets the construction requirement.

Preferably, the connecting ends of the grouting section and the landfill section and the connecting ends between the adjacent short pipes are provided with external threads, and the connecting pieces are internal thread joints.

By adopting the technical scheme, the grouting section is in threaded connection with the landfill section and the adjacent short pipes, so that the installation is convenient.

Preferably, the outer surface of slip casting section is equipped with the scale, and the bag has a plurality of, and closely sets up along the vertical direction of slip casting section.

By adopting the technical scheme, if the height of the karst cave is too large, a plurality of bags can be arranged to tightly fill the periphery of the area to be reinforced of the karst cave, and the height of the bags can be determined according to the scales.

Preferably, the outer parts of the upper end and the lower end of the bag are provided with limiting devices for reinforcement, the limiting devices are iron wires or flexible adhesive tapes, and the iron wires or the flexible adhesive tapes are fixed on the outer parts of the upper end and the lower end of the bag in a manner of surrounding the grouting section.

Through adopting above-mentioned technical scheme, bring the reinforcement bag through iron wire or flexible glue, avoid the slip casting in-process thick liquid to reveal, guarantee to consolidate effectually.

Preferably, the upper end of the grouting drill bit is welded with a protection plate.

Through adopting above-mentioned technical scheme, stretch into the process of solution cavity at the slip casting pipe, the bag probably runs into the karst inner wall and breaks, and the protection plate can protect the bag, avoids appearing the damaged phenomenon of bag.

Preferably, the pipe diameter of the grouting pipe is 30-50mm, and the thickness of the inner wall is 2-5 mm.

Through adopting above-mentioned technical scheme, the pipe diameter of slip casting pipe and the size of interior wall thickness accord with the construction needs.

Therefore, the utility model discloses possess following advantage: (1) the end part of the grouting pipe is bound with the bag, and the high-strength consolidation body is formed by grouting into the bag, so that the consolidation effect is good and the consolidation effect is not easily influenced by underground water in a rock-dissolving area; (2) the high-strength consolidation body forms a grout stop wall, and then the cavity of the area to be consolidated of the karst cave is densely filled, so that the consolidation effect of the foundation is good, and the later damage is less; (3) the structure is simple, the adaptability is strong, multiple drilling machines can operate simultaneously, the construction period is shortened, the construction cost is saved, and the construction difficulty is reduced.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural view of the present invention during construction;

FIG. 3 is a schematic diagram of an embodiment of the present invention;

fig. 4 is another schematic structural diagram of the implementation area of the present invention.

Illustration of the drawings: 1-grouting pipe, 2-bag, 3-grouting port, 4-grouting drill, 5-grout outlet, 6-pipe cap, 7-grouting section, 8-landfill section, 9-connecting piece, 10-short pipe, 11-scale, 12-limiting device, 13-protective plate, 14-karst cave, 15-landfill, 16-reinforcing area, 17-reinforcing-free area and 18-protective layer.

Detailed Description

The technical solution of the present invention is further specifically described below by way of examples and with reference to the accompanying drawings.

As shown in fig. 1, the utility model provides a technical scheme, a karst ground local adds thick liquid reinforcing apparatus comprises slip casting pipe 1 and bag 2, slip casting pipe 1 is the steel pipe of pipe diameter 33.7mm wall thickness 2.5mm, bag 2 adopts the anticorrosive cloth of reverse osmosis to make, and the surface of bag 2 wraps up there is protective layer 18, protective layer 18 plays the effect of protective bag 2, the height is 1.5m after bag 2 is filled fully in this embodiment, the diameter is 0.6 m; the top of slip casting pipe 1 is equipped with slip casting mouth 3, and the cover is equipped with the internal thread pipe cap 6 that is used for external slip casting machine on the body of slip casting mouth 3 department, and pipe cap 6 is steel round platform shape cap, and the bottom of slip casting pipe 1 is equipped with conical slip casting drill bit 4, and the welding of 4 upper ends of slip casting drill bits has guard plate 13.

The grouting pipe 1 is divided into a grouting section 7 at the lower part and a landfill section 8 at the upper part, the outer surface of the grouting section 7 is provided with scales 11, the grouting section 7 and the landfill section 8 are connected through a connecting piece 9, the grouting section 7 penetrates through the inside of the bag 2, the bag 2 is tightly arranged along the vertical direction of the grouting section 7, a plurality of grout outlet holes 5 are arranged on the pipe body of the grouting pipe 1 in the bag 2, the grout outlet holes 5 are spirally arranged on the surface of the pipe body at 90 degrees, the axial distance between two adjacent grout outlet holes 5 along the pipe body is 150mm, and the aperture of each grout outlet hole 5 is 10 mm; landfill section 8 comprises a plurality of nozzle stub 10, and connect through connecting piece 9 between the adjacent nozzle stub 10, and the height of every nozzle stub is 1m, and above-mentioned slip casting section 7 all is equipped with the external screw thread with landfill section 8's link and the link between the adjacent nozzle stub 10, and connecting piece 9 is interior screwed joint, and the upper and lower both ends outside of bag 2 is equipped with the iron wire in this embodiment, and the iron wire is fixed in the outside at bag 2 upper and lower both ends with the mode around slip casting section 7.

As shown in fig. 2, in the process of reinforcing the karst rock foundation, a geological exploration method is required on site and geophysical prospecting is matched to infer the distribution characteristics of the karst caves 14, including the size, range, position, quantity and the like of the karst caves 14, the boundary line of the karst caves 14 is determined according to geophysical prospecting data, then the reinforcing area and the range of the area which does not need to be reinforced of the karst caves 14 are determined (as shown in fig. 3 and 4), the required positions and the quantity of grouting holes are determined according to the boundary line range, in the embodiment, the diameter of the grouting holes is 150mm, the height of the karst caves is 4m, the grouting holes are drilled along the outer edge of the boundary line, so that the central connecting lines of the grouting holes surround to form a reinforcing area 16 of the karst caves 14, 3 sacks 2 are bound on a grouting section according to the height of the karst caves 14, the height of the sacks 2 is adjusted to 4m according to the scale 11, the grouting pipes 1 are placed into, grouting the bag 2 through the grouting pipe 1, tightly filling a gap between the grouting pipe 1 and a grouting hole by using a filler 15 made of clay mortar, forming a grout stopping wall after grout is solidified, drilling the grouting hole above a to-be-reinforced area of the karst cave, and compactly filling a cavity by using the grouting liquid to finish the local grouting reinforcement process of the karst cave.

It should be understood that this example is for illustrative purposes only and is not intended to limit the scope of the present invention. Furthermore, it should be understood that various changes and modifications of the present invention may be made by those skilled in the art after reading the teachings of the present invention, and these equivalents also fall within the scope of the appended claims.

Claims

1. The utility model provides a local reinforcing apparatus that adds thick liquid of karst ground, includes slip casting pipe (1) and bag (2), its characterized in that: the top of slip casting pipe (1) is equipped with slip casting mouth (3), and the bottom is equipped with slip casting drill bit (4), the lower part of slip casting pipe (1) pass above-mentioned bag (2) inside and with bag (2) between sealing connection, slip casting pipe (1) is located and is equipped with a plurality of grout outlet (5) on the body of bag (2), the cover is equipped with pipe cap (6) that are used for external slip casting machine on the body of slip casting mouth (3) department.

2. The karst foundation local-grouting reinforcement device of claim 1, characterized in that: the grouting pipe (1) comprises a grouting section (7) at the lower part and a landfill section (8) at the upper part, the grouting section (7) and the landfill section (8) are connected through a connecting piece (9), and the grout outlet (5) is positioned on the grouting section (7).

3. The karst foundation local-grouting reinforcement device of claim 2, characterized in that: the landfill section (8) is composed of a plurality of short pipes (10), and the adjacent short pipes (10) are connected through connecting pieces (9).

4. The karst foundation local-grouting reinforcement device of claim 3, characterized in that: the connecting end of the grouting section (7) and the landfill section (8) and the connecting end between the adjacent short pipes (10) are both provided with external threads, and the connecting piece (9) is an internal thread joint.

5. The karst foundation local-grouting reinforcement device of claim 2, characterized in that: the outer surface of the grouting section (7) is provided with scales (11).

6. The karst foundation local-grouting reinforcement device of claim 5, characterized in that: the number of the bags (2) is several, and the bags are tightly arranged along the vertical direction of the grouting section (7).

7. The karst foundation local-grouting reinforcement device of claim 6, wherein: and limiting devices (12) for reinforcement are arranged outside the upper end and the lower end of the bag (2).

8. The karst foundation local-grouting reinforcement device of claim 7, characterized in that: stop device (12) are iron wire or flexible sticky tape, and iron wire or flexible sticky tape are fixed in the outside at bag (2) upper and lower both ends with the mode of surrounding slip casting section (7).

9. The karst foundation local-grouting reinforcement device as claimed in any one of claims 1 to 8, characterized in that: and a protection plate (13) is welded at the upper end of the grouting drill bit (4).

10. The karst foundation local-grouting reinforcement device of claim 9, characterized in that: the pipe diameter of the grouting pipe (1) is 30-50mm, and the thickness of the inner wall is 2-5 mm.