CN215329904U - Stratum grouting system - Google Patents
Stratum grouting system Download PDFInfo
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- CN215329904U CN215329904U CN202120762451.4U CN202120762451U CN215329904U CN 215329904 U CN215329904 U CN 215329904U CN 202120762451 U CN202120762451 U CN 202120762451U CN 215329904 U CN215329904 U CN 215329904U
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Abstract
The utility model discloses a stratum grouting system which comprises a sleeve, wherein the sleeve is drilled in a stratum to be constructed, the lower part of the sleeve is provided with a section of grout outlet sleeve with a grout outlet hole, a rubber plug is arranged inside the sleeve above the grout outlet sleeve, an inflation cavity is arranged inside the rubber plug, the rubber plug is connected with an air pipe, the bottom end of the air pipe is communicated with the inflation cavity of the rubber plug, and the top end of the air pipe is connected with an air compressor or a compressed air tank; set up a slip casting pipe and run through this rubber embolism, make the bottom grout outlet and the grout outlet sleeve pipe intercommunication of slip casting pipe, the top grout inlet of slip casting pipe is connected to the mud jacking pump. The rubber plug is applied with certain pressure through the air compressor or the compressed air tank, so that the outer wall of the rubber plug is tightly attached to the inner wall of the casing pipe to realize sealing, and the grouting pump injects the slurry with certain pressure into the slurry outlet casing pipe through the grouting pipe to perform grouting. The equipment used in the utility model is simple and conventional, and is convenient for large-area popularization and application.
Description
Technical Field
The utility model belongs to the technical field of grouting construction of civil engineering foundations, and particularly relates to a stratum grouting system.
Background
Underground engineering in the 21 st century will be developed vigorously, the problem of underground water level is firstly solved in underground engineering, and most of underground engineering accidents occurring at present are caused by improper underground water disposal. Therefore, the construction of the waterproof curtain is often carried out firstly in the underground engineering, and the main purpose of the waterproof curtain is to prevent the underground water level at the periphery of the engineering from entering a construction area to cause construction inconvenience and even engineering accidents.
The method is characterized in that the traditional curtain grouting technology is generally adopted to perform rock stratum grouting operation in rock stratum with higher strength and difficult hole collapse, because the strength of the wall of the rock stratum hole is high, a sealing rubber plug can be directly placed in a drilled hole, a cavity inside the plug is pressurized and expanded, so that the outer wall of the plug is tightly attached to the wall of the rock stratum hole to achieve a sealing effect, then high-pressure grouting operation is performed to the rock stratum at the lower part through a grouting pipe in the center of the plug, and the grouting operation of the whole drilled hole is completed section by section from bottom to top in the same way.
In rock strata or sandy soil foundations with low-strength and easy-to-collapse holes, rock strata bodies on the walls of drilled holes are low in strength and easy to collapse, and when the sealing rubber plugs are pressurized and expanded, the walls of the drilled holes can be damaged by extrusion, so that the effect of joint sealing between the plugs and the walls of the drilled holes cannot be achieved, and slurry leakage between the plugs and the walls of the drilled holes can be caused when high-pressure grouting is performed on the lower portions of the plugs. Under the condition, the traditional process adopts a top-down grouting process, namely, drilling and grouting treatment are carried out on an upper rock-soil body, after slurry is solidified, a hole is drilled again to penetrate through the layer to a certain depth of a next section of stratum, the strength of the grouted stratum is increased due to the solidification of the slurry, the collapse of the hole wall cannot occur, the sealing rubber plug can also be arranged in the range to carry out pressurization expansion sealing treatment so as to realize high-pressure grouting operation on a second section of rock-soil body, after the solidification strength of the slurry of the layer is increased, the hole is drilled again to penetrate through the two sections of stratum which grouting is finished into a third section of stratum to a certain depth, a third section of grouting operation is carried out, and the grouting operation in the whole depth range is finished from top to bottom in this way.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects of the prior art and provide a formation grouting system.
The utility model is realized by the following technical scheme:
a stratum grouting system comprises a sleeve, wherein the sleeve is drilled in a stratum to be constructed, a section of grout outlet sleeve with a grout outlet hole is arranged at the lower part of the sleeve, a rubber plug is arranged inside the sleeve above the grout outlet sleeve, an inflation cavity is formed inside the rubber plug, an air pipe is connected to the rubber plug, the bottom end of the air pipe is communicated with the inflation cavity of the rubber plug, and the top end of the air pipe is connected to an air compressor or a compressed air tank; set up a slip casting pipe and run through this rubber embolism, make the bottom grout outlet and the grout outlet sleeve pipe intercommunication of slip casting pipe, the top grout inlet of slip casting pipe is connected to the mud jacking pump. Apply certain pressure to the rubber embolism through air compressor machine or compressed air jar for the outer wall of rubber embolism hugs closely with sheathed tube inner wall and realizes sealedly, and the mud jacking pump pours into out the thick liquid sleeve pipe into the thick liquid through the slip casting pipe with the thick liquid of certain pressure, and maintains this pressure for a certain time, makes the thick liquid can pour into and treats the grout stratum certain distance.
In the technical scheme, the grouting pipe penetrates through the rubber plug from the central axis of the rubber plug.
In the technical scheme, the diameter of the rubber plug in a natural state is slightly smaller than the inner diameter of the sleeve, so that the rubber plug can be smoothly placed in the sleeve to a proper position.
In the technical scheme, the air pipe and the grouting pipe are respectively provided with a pressure gauge for controlling the pressure of the pipeline, and the grouting pipe is also provided with a flow meter for recording the grouting amount.
In the technical scheme, a section of sleeve is connected below the slurry outlet sleeve, another rubber plug is arranged in the sleeve, the rubber plug above the slurry outlet sleeve is connected with the rubber plug below the slurry outlet sleeve through another air pipe, so that the inner inflation cavities of the two rubber plugs are communicated, and before grouting, certain pressure is simultaneously applied to the rubber plugs and the rubber plugs through an air compressor or a compressed air tank, so that the outer walls of the two rubber plugs are tightly attached to the inner wall of the sleeve, and the sealing of the upper part and the lower part of the slurry outlet sleeve is realized; and after sealing, the grouting pump pours the grout with certain pressure into the grout outlet sleeve through the grouting pipe for grouting.
In the technical scheme, the sleeve is a steel pipe with the diameter of 100-200 mm.
In the technical scheme, the diameter of the slurry outlet hole in the slurry outlet sleeve is 2-3 mm and is arranged in a triangular shape.
In the technical scheme, the grouting pipe is a steel pipe with the nominal diameter of DN 15.
In the technical scheme, the air pipe of the rubber plug above the slurry outlet sleeve is a pneumatic PVU pipe with the diameter of 8-12 mm.
In the technical scheme, the air pipe between the two rubber plugs is a steel pipe with the nominal diameter of DN 15.
The utility model has the advantages and beneficial effects that:
1. the grouting method for the easily collapsed stratum has the advantages of simple and conventional equipment and convenience for large-area popularization and application.
2. The grouting method for the easily collapsed stratum realizes the vertical continuous grouting operation from bottom to top, avoids repeated drilling of the stratum with the upper part being grouted and equal-strength time for increasing the strength of grout after grouting in the traditional process, saves a large amount of engineering quantity, greatly improves the grouting operation efficiency of the stratum and reduces the engineering cost.
Drawings
Fig. 1 is a schematic view of a formation grouting system according to a first embodiment of the utility model.
Fig. 2 is a schematic view of a formation grouting system according to a second embodiment of the utility model.
In the figure:
the device comprises a grouting pump 1, a casing 2, a slurry outlet casing 3, a grouting pipe 4, a flowmeter 5, a pressure gauge 6, an air compressor or a compressed air tank 7, an air pipe 8, a rubber plug 9, a rubber plug 10 and an air pipe 11.
For a person skilled in the art, other relevant figures can be obtained from the above figures without inventive effort.
Detailed Description
In order to make the technical solution of the present invention better understood, the technical solution of the present invention is further described below with reference to specific examples.
Example one
Referring to the attached figure 1, the stratum grouting system comprises a sleeve 2, wherein the sleeve is drilled in a stratum to be constructed, the lower part of the sleeve is provided with a section of grout outlet sleeve 3 with a grout outlet, a rubber plug 9 is arranged inside the sleeve above the grout outlet sleeve 3, an inflation cavity is arranged inside the rubber plug, the rubber plug is connected with an air pipe 8, the bottom end of the air pipe is communicated with the inflation cavity of the rubber plug, and the top end of the air pipe is connected with an air compressor or a compressed air tank 7; set up a slip casting pipe 4 and run through this rubber embolism 9, make the bottom grout outlet and the grout outlet sleeve pipe 3 intercommunication of slip casting pipe, the top grout outlet of slip casting pipe 4 is connected to grouting pump 1. Apply certain pressure to the rubber embolism through air compressor machine or compressed air jar for the outer wall of rubber embolism hugs closely with sheathed tube inner wall and realizes sealedly, and the mud jacking pump pours into out the thick liquid sleeve pipe into the thick liquid through the slip casting pipe with the thick liquid of certain pressure, and maintains this pressure for a certain time, makes the thick liquid can pour into and treats the grout stratum certain distance.
Furthermore, the injection pipe preferably extends through the rubber plug from the central axis of the rubber plug.
Furthermore, the diameter of the rubber plug in a natural state is slightly smaller than the inner diameter of the casing pipe, so that the rubber plug can be smoothly placed in the casing pipe to a proper position.
Further say, when placing the rubber embolism, the handheld trachea of constructor and slip casting pipe are transferred the rubber embolism along the sleeve pipe gradually to through the transfer length of control slip casting pipe, confirm the position of transferring of rubber embolism, after the rubber embolism reachd the assigned position, fixed tracheal position stops to transfer.
Furthermore, the air pipe 8 and the grouting pipe 4 are respectively provided with a pressure gauge 6 for controlling the pipeline pressure, and the grouting pipe 4 is also provided with a flow meter 5 for recording the grouting amount.
The construction method of the stratum grouting system comprises the following steps:
the method comprises the following steps: drilling and forming holes in easily collapsed strata such as silt, sandy soil, strongly weathered rock and the like by adopting a casing following wall protection mode, wherein a section of slurry outlet casing 3 with a slurry outlet hole is arranged at the lower part of the casing 2.
Step two: after the grout outlet sleeve 3 at the lower part of the sleeve reaches the position of a ground to be grouted, putting a rubber plug 9 from the top of the sleeve, and putting the rubber plug down to the position above the grout outlet sleeve 3 along the inside of the sleeve, wherein an inflation cavity is arranged inside the rubber plug 9, an air pipe 8 is connected to the rubber plug, the bottom end of the air pipe is communicated with the inflation cavity of the rubber plug, and the top end of the air pipe is connected to an air compressor or a compressed air tank 7; set up a slip casting pipe 4 and run through this rubber embolism 9, make the bottom grout outlet and the grout outlet sleeve pipe 3 intercommunication of slip casting pipe 4, the top grout outlet of slip casting pipe 4 is connected to grouting pump 1.
Step three: a certain pressure is applied to the rubber plug 9 through an air compressor or a compressed air tank 7, so that the outer wall of the rubber plug 9 is tightly attached to the inner wall of the sleeve 2 to realize sealing; the grouting pump 1 pours the grout with a certain pressure into the grout outlet casing 3 through the grouting pipe 4, and maintains the pressure for a certain time, so that the grout can be poured into the stratum to be grouted for a certain distance.
Step four: and lifting the slurry outlet casing 3 upwards to the next section of stratum position to be grouted by a lifting jack or a drilling machine on the ground surface, and grouting again.
Example two
On the basis of the first embodiment, further referring to fig. 2, in order to ensure the uniformity of the grouting quality from bottom to top, a process of upper and lower double rubber plugs 9 can be adopted, namely, a section of sleeve 2 is also connected below the grout outlet sleeve 3, another rubber plug 10 is arranged in the sleeve 2, the rubber plug 9 above the grout outlet sleeve 3 is connected with the rubber plug 10 below the grout outlet sleeve 3 through another air pipe 11, so that the inner inflation cavities of the two rubber plugs are communicated, and before grouting, a certain pressure can be simultaneously applied to the rubber plugs 9 and the rubber plugs 10 through an air compressor or a compressed air tank 7, so that the outer walls of the two rubber plugs are tightly attached to the inner wall of the sleeve to realize the sealing of the upper part and the lower part of the grout outlet sleeve 3; after sealing, the grouting pump 1 pours the grout with a certain pressure into the grout outlet sleeve 3 through the grouting pipe 4 for grouting.
EXAMPLE III
On the basis of the above embodiment, further, the casing 2 is a steel pipe with a diameter of 100-200 mm, and the grout outlet holes in the grout outlet casing 3 are 2-3 mm in diameter and arranged in a triangle.
Further, the air pipe 8 is a pneumatic PVU pipe with the diameter of 8-12 mm, and the air pipe 11 between the two rubber plugs is a steel pipe with the nominal diameter of DN 15.
Further, the grouting pipe 4 is a steel pipe with a nominal diameter of DN 15.
Further, the air compressor or the compressed air tank 7 should be capable of providing an air pressure of not less than 0.5 MPa.
Further, the slurry pump 1 should be capable of providing a slurry pressure of not less than 1.5 MPa.
Furthermore, the rubber plug is applied with a certain pressure of 0.5 MPa.
Further, the slurry pressure and the maintenance time thereof are determined according to the permeability of the formation to be grouted, so as to ensure the grouting effect.
Spatially relative terms, such as "upper," "lower," "left," "right," and the like, may be used in the embodiments for ease of description to describe one element or feature's relationship to another element or feature as illustrated in the figures. It will be understood that the spatial terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "lower" can encompass both an upper and a lower orientation. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
The utility model has been described in an illustrative manner, and it is to be understood that any simple variations, modifications or other equivalent changes which can be made by one skilled in the art without departing from the spirit of the utility model fall within the scope of the utility model.
Claims (10)
1. A formation grouting system, characterized in that: the grouting device comprises a sleeve, wherein the sleeve is drilled in a stratum to be constructed, a section of grout outlet sleeve with a grout outlet hole is arranged at the lower part of the sleeve, a rubber plug is arranged inside the sleeve above the grout outlet sleeve, an inflation cavity is arranged inside the rubber plug, an air pipe is connected to the rubber plug, the bottom end of the air pipe is communicated with the inflation cavity of the rubber plug, and the top end of the air pipe is connected to an air compressor or a compressed air tank; set up a slip casting pipe and run through this rubber embolism, make the bottom grout outlet and the grout outlet sleeve pipe intercommunication of slip casting pipe, the top grout inlet of slip casting pipe is connected to the mud jacking pump.
2. The formation grouting system of claim 1, wherein: the grouting pipe penetrates through the rubber plug from the central axis of the rubber plug.
3. The formation grouting system of claim 1, wherein: the diameter of the rubber plug in a natural state is smaller than the inner diameter of the sleeve, so that the rubber plug can be smoothly placed in the sleeve to a proper position.
4. The formation grouting system of claim 1, wherein: the air pipe and the grouting pipe are respectively provided with a pressure gauge for controlling the pipeline pressure, and the grouting pipe is also provided with a flow meter for recording the grouting amount.
5. The formation grouting system of claim 1, wherein: the lower part of the slurry outlet sleeve is also connected with a section of sleeve, another rubber plug is arranged in the sleeve, and the rubber plug above the slurry outlet sleeve is connected with the rubber plug below the slurry outlet sleeve through another air pipe, so that the inner inflation cavities of the two rubber plugs are communicated.
6. The formation grouting system of claim 1, wherein: the sleeve pipe is a steel pipe with the diameter of 100-200 mm.
7. The formation grouting system of claim 1, wherein: the diameter of a slurry outlet hole in the slurry outlet sleeve is 2-3 mm.
8. The formation grouting system of claim 1, wherein: the grouting pipe is a steel pipe with the nominal diameter of DN 15.
9. The formation grouting system of claim 1, wherein: the air pipe of the rubber plug above the slurry outlet sleeve adopts a pneumatic PVU pipe with the diameter of 8-12 mm.
10. The formation grouting system of claim 5, wherein: the air pipe between the two rubber plugs adopts a steel pipe with the nominal diameter of DN 15.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120762451.4U CN215329904U (en) | 2021-04-14 | 2021-04-14 | Stratum grouting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120762451.4U CN215329904U (en) | 2021-04-14 | 2021-04-14 | Stratum grouting system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215329904U true CN215329904U (en) | 2021-12-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120762451.4U Active CN215329904U (en) | 2021-04-14 | 2021-04-14 | Stratum grouting system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215329904U (en) |
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2021
- 2021-04-14 CN CN202120762451.4U patent/CN215329904U/en active Active
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