CN217734110U - Stagnant water reinforced structure of push pipe working well in high-water-flow sand geology - Google Patents
Stagnant water reinforced structure of push pipe working well in high-water-flow sand geology Download PDFInfo
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- CN217734110U CN217734110U CN202221409685.1U CN202221409685U CN217734110U CN 217734110 U CN217734110 U CN 217734110U CN 202221409685 U CN202221409685 U CN 202221409685U CN 217734110 U CN217734110 U CN 217734110U
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- waterproof curtain
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- jacking
- sleeve
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 30
- 239000004576 sand Substances 0.000 title claims abstract description 21
- 239000002002 slurry Substances 0.000 claims abstract description 21
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 19
- 238000005553 drilling Methods 0.000 claims abstract description 13
- 239000007788 liquid Substances 0.000 claims abstract description 9
- 239000004567 concrete Substances 0.000 claims abstract description 5
- 238000002360 preparation method Methods 0.000 claims description 2
- 238000007789 sealing Methods 0.000 claims description 2
- 239000002689 soil Substances 0.000 description 12
- 239000011440 grout Substances 0.000 description 7
- 239000004568 cement Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000009412 basement excavation Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 235000019353 potassium silicate Nutrition 0.000 description 3
- 238000007569 slipcasting Methods 0.000 description 3
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
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- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The utility model discloses a stagnant water reinforced structure of push pipe working well in high-water-flow sand geology, reserve the work pit shaft of push pipe entrance to a cave on the lateral wall of lower part. A waterproof curtain sleeve is arranged at the periphery of the working shaft for 1-2 m; a waterproof curtain wall with a square cross section extends out of the outer wall of the waterproof curtain sleeve along the axis of the top pipe opening, the side length of the cross section of the waterproof curtain wall is 2m larger than the diameter of the top pipeline, and the length of the waterproof curtain wall is 9-11 m; a back cover poured by concrete is arranged at the bottom of the working shaft, and bottom reinforcing layers are arranged in the range with the diameter of 2m and the diameter of the outer diameter of the waterproof curtain sleeve; the waterproof curtain sleeve, the waterproof curtain wall and the bottom reinforcing layer are all formed by drilling and grouting; the grouting slurry adopts cement-water glass double-liquid slurry. The utility model discloses a stagnant water is consolidated effectually, makes the mechanical properties of quicksand geology improve, and stability can and bearing capacity reinforcing guarantee the stability and the safety of push pipe working well.
Description
Technical Field
The utility model relates to a stagnant water reinforced structure of push pipe working well in high-water-flow sand geology.
Background
In municipal pipe network engineering, a non-excavation jacking pipe is adopted by a drift leader to carry out water stop treatment on a jacking pipe working well in high groundwater quicksand geology by adopting a high-pressure jet grouting pile. However, the slurry of the high-pressure jet grouting pile is long in solidification time and is easily taken away by running water, so that the pile forming effect is poor, the water stopping effect cannot be achieved, and water and sand are very easily gushed during excavation and pipeline jacking, so that a cavity and the ground surface sink, and the current building is seriously threatened.
In addition, the structure of high-water-flow sand geology is loose, the strength is low, stable sinking of the pipe-jacking working well is difficult to guarantee, and finally the final sinking elevation of the working well is difficult to control.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art's defect and provide a stagnant water reinforced structure of push pipe working well in high-water-flow sand geology, its stagnant water is consolidated effectually, makes the mechanical properties of quicksand geology obtain improving, and stability can and bearing capacity reinforcing guarantee the stability and the safety of push pipe working well.
The purpose of the utility model is realized like this: a water-stopping reinforcing structure of a pipe-jacking working well in high-water-flow sand geology comprises a working shaft, wherein a pipe-jacking hole is reserved on the side wall of the lower part of the working shaft; wherein,
a waterproof curtain sleeve is arranged at the periphery of the working shaft for 1-2 m, and the thickness of the waterproof curtain sleeve is 0.5-1.5 m; a waterproof curtain wall with a square cross section is extended out of the outer wall of the waterproof curtain sleeve along the path of the jacking pipe by taking the center of the jacking pipe opening as a reference, the side length of the cross section of the waterproof curtain wall is 2m greater than the diameter of the jacking pipe, and the length of the waterproof curtain wall is 9-11 m; a bottom sealing layer is arranged at the bottom of the working shaft, and a bottom reinforcing layer is arranged in the range of the diameter of the bottom of the working shaft being 2m upwards and 2m downwards and the diameter of the bottom of the working shaft being the outer diameter of the waterproof curtain sleeve;
the waterproof curtain sleeve, the waterproof curtain wall and the bottom reinforcing layer are all formed by drilling and grouting; the grouting slurry adopts cement-water glass double-liquid slurry;
the back cover is formed by pouring concrete.
The waterproof reinforcing structure of the pipe jacking working well in the high-water-flow sand geology is characterized in that the waterproof curtain sleeve is composed of an inner waterproof curtain ring and an outer waterproof curtain ring with the space of 0.5-1.5 m.
The water stopping reinforcing structure of the pipe jacking working well in the high-water-flow sand geology is characterized in that a rubber water stopping ring is installed at the opening of the pipe jacking hole.
The utility model discloses a stagnant water reinforced structure of push pipe working well in high water bit stream sand geology has following characteristics:
1) Cement-water glass double-liquid slurry is injected into a soil body to form a waterproof curtain sleeve, a waterproof curtain wall and a bottom reinforcing layer, so that the waterproof effect is good;
2) The reinforcing effect is good, the mechanical property of the quicksand geology is improved, the stability and the bearing capacity are enhanced, and the stability and the safety of the pipe jacking working well are ensured;
3) The grouting slurry has short setting time and good effect; the grouting operation is safe and convenient.
Drawings
FIG. 1 is a schematic view of a water-stopping reinforcement structure of a pipe-jacking working well in high-water-level sand geology according to the present invention;
fig. 2 is a left side view of fig. 1.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings.
Please refer to fig. 1 and fig. 2, the water stopping reinforcement structure for the pipe-jacking working well in high-water-flow sand geology of the present invention includes a working shaft 1, a pipe-jacking opening 10 is reserved on the lower side wall of the working shaft 1, and the pipe-jacking opening 10 is provided with a rubber water stopping ring 7.
A waterproof curtain sleeve 2 is arranged at the periphery 1-2 m of the working shaft 1; the waterproof curtain sleeve 2 consists of an inner waterproof curtain ring and an outer waterproof curtain ring, and the distance between the inner waterproof curtain ring and the outer waterproof curtain ring is 0.5-1.5 m; the waterproof curtain sleeve 2 is formed by drilling and grouting a hole in a soil body by a drilling and grouting integrated grouting machine, and grouting slurry adopts cement-water glass double-liquid slurry;
a waterproof curtain wall 4 with a square cross section is extended out of the outer wall of the waterproof curtain sleeve 2 along the path of the top pipe by taking the center of the top pipe opening as a reference, the side length of the cross section of the waterproof curtain wall 4 is 2m larger than the diameter of the top pipe, and the length of the waterproof curtain wall 4 is 9-11 m; the waterproof curtain wall 4 is formed by drilling and grouting a hole in a soil body by a drilling and grouting integrated grouting machine, and the grouting slurry adopts cement-water glass double-liquid slurry;
the bottom of the working shaft 1 is provided with a back cover 5 formed by pouring concrete;
a bottom reinforcing layer 6 is arranged in the range that the bottom of the working shaft 1 is 2m upwards and 2m downwards and the diameter of the working shaft is the outer diameter of the waterproof curtain sleeve 2; the bottom strengthening layer 6 is formed by drilling and grouting an integrated grouting machine to drill holes in a soil layer and grouting, wherein the grouting slurry adopts cement-water glass double-liquid slurry.
The utility model discloses a stagnant water reinforced structure of push pipe working well in high water bit stream sand geology, form stagnant water curtain cover 2 through the slip casting in the peripheral 1 ~ 2m within range of work pit shaft 1, and also form bottom back up coat 6 through the slip casting in the bottom of work pit shaft 1, with improve the soil body nature, improve the bearing capacity and the self-stabilization ability of the soil body, form stagnant water curtain 4 through the slip casting on the push pipe route simultaneously, with the performance of disturbed soil body around improving push pipe aircraft nose 3 and beginning, in order to prevent that a large amount of gushes water and gush sand when the push pipe machine advances the hole and begins. The cement grout has the advantages of good durability, large consolidation strength, low cost, wide source, simple grout preparation, simple grouting operation and the like, but has the defects of low early strength, poor grout stability, long setting time and the like, and is suitable for soil layers such as sand layers, gravel layers, rocks and the like. The utility model mixes the water glass and the cement according to a certain proportion to form the cement-water glass double-liquid slurry, which can exert the advantages of respective materials and compensate the defects of respective materials to the maximum extent
The utility model discloses a stagnant water reinforced structure of push pipe working well in high-water-flow sand geology, wherein, the internal diameter of the working shaft 1 is 8m, the wall thickness is 0.5m, and the depth is 10m; the water-stopping reinforcing structure of the pipe-jacking working well comprises the following steps during construction:
firstly, drilling and grouting an integral grouting machine into a soil body within the range of 1-2 m of the periphery of a working shaft 1 to form a waterproof curtain sleeve 2, firstly, grouting an outer waterproof curtain ring, wherein the distance between grouting holes 20 is 0.5-1.5 m, the drilling depth is 8m, the grouting pressure is 0.75 MPa-2.0 MPa, then, grouting an inner waterproof curtain ring, the grouting holes of the inner waterproof curtain ring are staggered with the grouting holes of the outer waterproof curtain ring, the distance between the grouting holes 20 is 0.5-1.5 m, the drilling depth is 8m, the grouting depth is 2-8 m, and the grouting pressure is 0.75 MPa-2.0 MPa; the grouting slurry adopts cement-water glass double-liquid slurry, wherein the water-cement ratio of the cement slurry is 1.5-0.6, the concentration of the water glass solution is 25-35 DEG Be, the volume ratio of the cement slurry to the water glass slurry is 1;
step two, drilling and grouting are carried out at the bottom of the working shaft 1 to form a bottom reinforcing layer 6; the grouting depth is 8-12 m, and the injected grout is the same as the grout for forming the waterproof curtain sleeve 2;
step three, drilling and grouting are carried out on the outer wall of the waterproof curtain sleeve 2 along a jacking pipe path by taking the center of the jacking pipe opening 10 as a reference to form a waterproof curtain wall 4, and the injected grout is the same as the grout for forming the waterproof curtain sleeve 2; the length of the side of the cross section of the waterproof curtain wall 4 is 2m larger than the diameter of the pipeline on the top, and the length of the waterproof curtain wall 4 is 10m;
pouring a working shaft 1 in the waterproof curtain sleeve 2, wherein the working shaft 1 is formed by pouring a plurality of sections of open caisson; when the first section of open caisson is poured, sequentially binding steel bars, erecting a template and pouring concrete; after the first section of open caisson is poured, excavating a soil pit in the first section of open caisson until the first section of open caisson is completely sunk into a soil body, pouring a second section of open caisson to form a second section of open caisson, repeating the steps until the last section of open caisson is sunk into the soil body, constructing a reinforced concrete bottom seal 5 at the bottom of the working shaft 1 after the design requirement is met, and pumping water or grouting by a water pump when water seepage and sand flow problems occur in the excavation process;
and fifthly, installing a rubber water stop ring 7 at a pipe jacking hole 10 of the working shaft 1, installing a track of the pipe jacking machine on the back cover 5 in the working shaft 1, hoisting the pipe jacking machine head 3, and performing pipe jacking operation after all the pipe jacking machine heads 3 enter the pipe jacking hole 10.
The above embodiments are provided only for the purpose of illustration, not for the limitation of the present invention, and those skilled in the relevant art can make various changes or modifications without departing from the spirit and scope of the present invention, therefore, all equivalent technical solutions should also belong to the scope of the present invention, and should be defined by the claims.
Claims (3)
1. A water-stopping reinforcing structure of a pipe-jacking working well in high-water-flow sand geology comprises a working shaft, wherein a pipe-jacking hole is reserved on the side wall of the lower part of the working shaft; it is characterized in that the preparation method is characterized in that,
a waterproof curtain sleeve is arranged at the periphery of the working shaft for 1-2 m, and the thickness of the waterproof curtain sleeve is 0.5-1.5 m; a waterproof curtain wall with a square cross section is extended out of the outer wall of the waterproof curtain sleeve along the path of the jacking pipe by taking the center of the jacking pipe opening as a reference, the side length of the cross section of the waterproof curtain wall is 2m greater than the diameter of the jacking pipe, and the length of the waterproof curtain wall is 9-11 m; a bottom sealing is arranged at the bottom of the working shaft, and a bottom reinforcing layer is arranged in the range that the bottom of the working shaft faces upwards 2m and downwards 2m and the diameter of the bottom of the working shaft is equal to the outer diameter of the waterproof curtain sleeve;
the waterproof curtain sleeve, the waterproof curtain wall and the bottom reinforcing layer are all formed by drilling and grouting; the grouting slurry adopts cement-water glass double-liquid slurry;
the back cover is formed by pouring concrete.
2. The water-stopping reinforcing structure for the pipe-jacking working well in the high-water-flow sand geology according to claim 1, characterized in that the water-stopping curtain sleeve consists of an inner water-stopping curtain ring and an outer water-stopping curtain ring which have a distance of 0.5-1.5 m.
3. The water stopping and reinforcing structure of the pipe jacking working well in the high-water-flow sand geology according to claim 1, wherein the rubber water stopping ring is installed at the opening of the pipe jacking hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221409685.1U CN217734110U (en) | 2022-05-30 | 2022-05-30 | Stagnant water reinforced structure of push pipe working well in high-water-flow sand geology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221409685.1U CN217734110U (en) | 2022-05-30 | 2022-05-30 | Stagnant water reinforced structure of push pipe working well in high-water-flow sand geology |
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| Publication Number | Publication Date |
|---|---|
| CN217734110U true CN217734110U (en) | 2022-11-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221409685.1U Active CN217734110U (en) | 2022-05-30 | 2022-05-30 | Stagnant water reinforced structure of push pipe working well in high-water-flow sand geology |
Country Status (1)
| Country | Link |
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| CN (1) | CN217734110U (en) |
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2022
- 2022-05-30 CN CN202221409685.1U patent/CN217734110U/en active Active
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