CN215486037U - Water-rich sand layer sand flow-proof water burst working well - Google Patents
Water-rich sand layer sand flow-proof water burst working well Download PDFInfo
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- CN215486037U CN215486037U CN202120758363.7U CN202120758363U CN215486037U CN 215486037 U CN215486037 U CN 215486037U CN 202120758363 U CN202120758363 U CN 202120758363U CN 215486037 U CN215486037 U CN 215486037U
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Abstract
The utility model relates to a water-rich sand layer sand-flowing-preventing water burst working well which structurally comprises an underground continuous wall and a grid cement-soil wall arranged on the inlet and outlet sides of the underground continuous wall, wherein the underground continuous wall comprises a reinforcement cage made of reinforcing steel bars and concrete poured in the reinforcement cage, an embedded steel ring and embedded bolts are circumferentially arranged on the inner side of the reinforcement cage, an annular waterproof ring is arranged on the inner side of the underground continuous wall, water-swelling rubber is arranged between the annular waterproof ring and the embedded steel ring, the annular waterproof ring is fixed with the embedded steel ring through a steel pressing plate and the embedded bolts, the annular waterproof ring is made of elastic materials, and the inner diameter of the annular waterproof ring is smaller than the outer diameter of a jacking pipe so that the annular waterproof ring is tightly attached to the jacking pipe and deforms along the advancing direction of the jacking pipe.
Description
Technical Field
The utility model relates to the technical field of construction engineering, in particular to a sand-flowing-preventing water-gushing working well for a water-rich sand layer.
Background
The pipe construction technology has been rapidly developed in China in recent years, and is widely applied to underground passage engineering and comprehensive pipe gallery engineering. The pipe jacking method is used as a non-grooving construction method, and has the greatest advantage that a non-grooving underground excavation mode is adopted, so that the direct influence of an operation surface on an overground building or a structure is avoided. At present, the size of a domestic jacking pipe is generally smaller than 3600mm, the pipe is mostly circular, the geological and hydrological conditions in most areas are good, and the construction risk is low; however, as an underground excavation method, large-section special-shaped pipe jacking construction in a water-rich weak stratum belongs to high-risk operation, a tunnel portal is in a continuous starting state in the pipe jacking process, the risk of water burst and sand burst of the tunnel portal is extremely high under the influence of engineering geology, hydrology, structural dimension, jacking length and the like, water and soil loss is easy to occur, ground settlement is further caused, adverse social influence is generated, and in addition, in construction, casualties and property loss are often caused by sudden accidents, and the engineering progress is very influenced. Therefore, the research on the technology for preventing the inrush of the tunnel portal in the pipe jacking construction in the special stratum becomes the difficult point, the key point and the hot point problem of the development of the large-section special-shaped pipe jacking.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems in the prior art, the utility model provides a water-rich sand layer running sand water burst prevention working well with good waterproof effect and low construction risk, the working well structure comprises an underground continuous wall and a grid cement soil wall arranged at the inlet and outlet sides of the underground continuous wall, the underground continuous wall comprises a reinforcement cage made of reinforcing steel bars and concrete poured in the reinforcement cage, an embedded steel ring and embedded bolts are circumferentially arranged at the inner side of the reinforcement cage, an annular waterproof ring is arranged at the inner side of the underground continuous wall, water-swelling rubber is arranged between the annular waterproof ring and the embedded steel ring, the annular waterproof ring is fixed with the embedded steel ring through a steel pressing plate and the embedded bolts, the annular waterproof ring is made of an elastic material, the inner diameter of the annular waterproof ring is smaller than the outer diameter of a jacking pipe, so that the annular waterproof ring is tightly attached to the jacking pipe and deforms along the advancing direction of the jacking pipe, and the annular waterproof ring is made of the elastic material in the technical scheme, the inner diameter of the annular waterproof ring is smaller than the outer diameter of the jacking pipe, when the jacking pipe enters and exits, the annular waterproof ring stretches the annular waterproof ring through extrusion force and drives the annular waterproof ring to deform towards the advancing direction of the jacking pipe, and the annular waterproof ring is closely attached to the jacking pipe, so that underground water can be prevented from permeating into the working well along the gap between the jacking pipe and the opening; the annular waterproof ring is fixedly arranged on the embedded steel ring by the steel pressing plate and the water-swelling rubber, so that the waterproof ring has a good waterproof effect and is very firm.
Preferably, the grid cement-soil wall adopts a multi-layer grid type, and at least part of the cement-soil wall is closely attached to the upper part of the outer wall of the underground continuous wall; the arrangement mode in the technical scheme can be used for reinforcing the soil body at the hole opening in a large range, has a good waterproof effect and prevents surrounding underground water from entering the hole opening of the jacking pipe.
According to the preferable scheme, a linear steel sheet pile is inserted into one layer of the grid cement soil wall tightly attached to the underground continuous wall; according to the technical scheme, the support capability and the water stop are provided for the broken hole and the jacking pipe before entering and exiting the hole, and the linear steel sheet pile is pulled out during entering and exiting hole construction.
Preferably, a plurality of grouting pipes are arranged on the side, close to the inlet and the outlet of the working well, of the grid cement-soil wall; the grouting pipe is arranged in the technical scheme, so that grouting plugging can be performed when the hole leaks water.
According to the technical scheme, the glass fiber reinforcements and the foam concrete are arranged at the opening of the working well in a square shape, damage to the embedded steel ring and the embedded bolts is prevented, the two ends of the glass fiber reinforcements are in lap joint with the reinforcements of the underground continuous wall, the glass fiber reinforcements and the foam concrete are easy to break manually, and damage to the embedded steel ring and the embedded bolts during hole breaking can be prevented.
According to the preferable scheme, the embedded steel ring and the embedded bolts are wrapped and protected by the plastic film, so that the embedded parts are prevented from being damaged, and the hole and the embedded parts are conveniently cleaned at the broken hole.
As the preferred scheme, the cross section of the embedded steel ring is L-shaped, and the effect of fixing the annular waterproof ring is better.
Preferably, the grouting pipe is a steel pipe wrapping the filter cloth, and grouting holes are formed in the steel pipe.
Drawings
FIG. 1 is a plan view of the structure of the present invention.
FIG. 2 is a cross-sectional view of the present invention.
Fig. 3 is a structural schematic diagram of installation of the annular waterproof ring.
Fig. 4 is a structural elevation view of the present invention.
Wherein, 1, underground continuous wall; 2. a grid cement soil wall; 3. reinforcing steel bars; 4. concrete; 5. pre-burying a steel ring; 6. embedding bolts in advance; 7. an annular waterproof ring; 8. water-swellable rubber; 9. a steel pressing plate; 10. jacking pipes; 11. a linear steel sheet pile; 12. a grouting pipe; 13. a hole; 14. a glass fiber rib; 15. foam concrete.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the utility model and are not to be construed as limiting the utility model.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", and the like, indicate positional relationships based on the orientations and positional relationships shown in the drawings, are only for convenience of description and simplicity of description, and do not indicate or imply that the method or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be taken as limiting the present invention.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," "retained," and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; the two elements can be directly connected or indirectly connected through an intermediate medium, and the two elements can be communicated with each other at the inner sections. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.
As shown in fig. 1 to 4, the embodiment of the utility model provides a water-rich sand layer running sand water burst prevention working well with good waterproof effect and low construction risk, the working well structure comprises an underground continuous wall 1 and a grid cement soil wall 2 arranged at the inlet and outlet sides of the underground continuous wall 1, the underground continuous wall 1 comprises a reinforcement cage made of steel bars 3 and concrete 4 poured in the reinforcement cage, an embedded steel ring 5 and an embedded bolt 6 are circumferentially arranged at the inner side of the reinforcement cage, an annular waterproof ring 7 is arranged at the inner side of the underground continuous wall 1, water-swelling rubber 8 is arranged between the annular waterproof ring 7 and the embedded steel ring 5, the annular waterproof ring 7 is fixed with the embedded steel ring 5 through a steel pressing plate 9 and the embedded bolt 6, the annular waterproof ring 7 is made of an elastic material, and the inner diameter of the annular waterproof ring 7 is smaller than the outer diameter of a top pipe 10, so that the annular waterproof ring 7 is tightly attached to the top pipe 10 and deforms along the advancing direction of the top pipe 10, in the technical scheme, the annular waterproof ring 7 is made of elastic materials, the inner diameter of the annular waterproof ring 7 is smaller than the outer diameter of the top pipe 10, when the top pipe 10 enters or exits, the annular waterproof ring 7 stretches the annular waterproof ring 7 through extrusion force and drives the annular waterproof ring 7 to deform towards the advancing direction of the top pipe 10, and the annular waterproof ring 7 is closely attached to the top pipe 10, so that underground water can be prevented from permeating into a working well along a gap between the top pipe 10 and the opening 13; the annular waterproof ring 7 is fixedly arranged on the embedded steel ring 5 by using the steel pressing plate 9 and the water-swelling rubber 8, has a good waterproof effect and is very firm.
In some specific embodiments, as shown in fig. 1 and fig. 2, the grid cement-soil wall 2 is in a multi-layer grid type, and the cement-soil wall is at least partially arranged on the upper part of the outer wall of the underground continuous wall 1 in a close fit manner; the arrangement mode in the technical scheme can reinforce the soil body of the opening 13 in a large range, has a good waterproof effect and prevents surrounding underground water from entering the top pipe 10 and entering the opening 13.
In other specific embodiments, as shown in fig. 1 and 2, a straight steel sheet pile 11 is inserted into the grid cement soil wall 2 tightly attached to one layer of the underground continuous wall 1; according to the technical scheme, the support capability and the water stop are provided for the broken hole and the jacking pipe 10 before entering and exiting the hole, and the linear steel sheet pile 11 is pulled out during the entering and exiting construction.
Further preferably, a plurality of grouting pipes 12 are arranged on the grid cement soil wall 2 close to the inlet and outlet sides of the working well; in the technical scheme, a grouting pipe 12 is arranged to perform grouting plugging when a hole 13 leaks water, please refer to fig. 1.
Furthermore, the glass fiber bars 14 and the foam concrete 15 are arranged at the working well opening 13 in a square shape to prevent damage to the embedded steel ring 5 and the embedded bolts 6, and two ends of the glass fiber bars 14 are in lap joint with the steel bars 3 of the underground continuous wall 1.
Further, the embedded steel ring 5 and the embedded bolt 6 are wrapped and protected by a plastic film, damage to the embedded part is avoided, and the opening 13 and the embedded part are conveniently cleaned at the broken opening 13.
Further, as shown in fig. 3, the cross section of the embedded steel ring 5 is L-shaped, so that the effect of fixing the annular waterproof ring 7 is better.
Further, the grouting pipe 12 is a steel pipe wrapping the filter cloth, and grouting holes are formed in the steel pipe.
A construction method of a water-rich sand layer sand flow prevention water burst working well comprises the following steps:
s1 construction of the grid cement soil wall 2: a grid cement-soil wall 2 is arranged on one side of a top pipe 10 of the working well, which enters and exits the hole, by a cement-soil mixing pile machine, the grid cement-soil wall 2 is of a multi-layer cement-soil wall structure and partially surrounds an underground continuous wall 1 of the working well, and the depth of the grid cement-soil wall 2 exceeds a working well opening 13 by a certain depth;
s2, installing the linear steel sheet pile 11 and the grouting pipe 12: inserting linear steel sheet piles 11 into a layer of wall, close to a working well, of the grid cement soil wall 2, wherein the linear steel sheet piles 11 are overlapped through lock catches to form a curtain, and the insertion depth of the linear steel sheet piles 11 exceeds a certain depth of the hole 13; a plurality of grouting pipes 12 are inserted into two sides of a hole 13 between the linear steel sheet pile 11 and the underground continuous wall 1, and the insertion depth of the grouting pipes 12 exceeds the hole 13 by a certain depth; the grouting pipe 12 is a steel pipe wrapped with filter cloth, and small holes are punched on the steel pipe within the depth range of the hole 13 to serve as grouting holes.
S3 binding the reinforcement cage of the underground continuous wall: adopting a glass fiber rib 14 at the position where the top pipe 10 enters and exits the hole, wherein two ends of the glass fiber rib 14 are lapped with the reinforcing steel bar 3 and are fixed by a U-shaped card; fixedly welding an embedded steel ring 5 and an embedded bolt 6 in 3 cages of the underground continuous wall 1 at the position where the jacking pipe 10 enters and exits the hole, and wrapping the surfaces of the embedded steel ring 5 and the embedded bolt 6 with plastic films.
S4 pouring the underground continuous wall 1: carrying out grooving operation on the underground diaphragm wall 1 by using a grooving machine, putting down a reinforcement 3 cage after grooving, and then pouring concrete 4; when the groove width concrete 4 of the opening 13 is poured, firstly, the concrete 4 is poured, then, the foam concrete 15 is poured in the area of the opening 13, and finally, the concrete 4 is poured.
S5 working well excavation: and after the concrete 4 of the underground continuous wall 1 reaches the design strength, excavating the working well to the design elevation, and then sealing the bottom.
S6 manual breaking of the hole 13: before the jacking pipe 10 enters the tunnel, firstly, manually breaking the foam concrete 15 at the tunnel opening 13, paying attention to protect the embedded steel ring 5 and the embedded bolt 6 when breaking the foam concrete 15, uncovering the protective film and cleaning the surfaces of the embedded steel ring 5 and the embedded bolt 6.
S7 installing the annular waterproof ring 7: firstly, a layer of water-swelling rubber 8 is arranged on an embedded steel ring 5, then an annular waterproof ring 7 is arranged, and a layer of steel pressing plate 9 is arranged and fixed through embedded bolts 6.
And S8, if water leakage and sand gushing occur after the hole is broken, grouting reinforcement is carried out by using the grouting pipe 12.
S9, pushing the pipe jacking 10 into the hole: pulling out a linear steel sheet pile 11, utilizing a grouting pipe 12 to perform grouting reinforcement to remove cement soil wall damage caused by the steel sheet pile, enabling a jacking pipe 10 to enter a drilling hole from a hole opening 13 or exit the hole from the opposite direction, and penetrating out from the center of the annular waterproof ring 7 to drive the annular waterproof ring 7 to deform to play a waterproof role; by adopting the construction method, the construction risk is reduced, the phenomena of water gushing and sand gushing are avoided, and the construction time is saved.
It should be noted that the above embodiments are merely representative examples of the present invention. Many variations of the utility model are possible. Any simple modification, equivalent change and modification of the above embodiments according to the spirit of the present invention should be considered to be within the protection scope of the present invention.
Claims (8)
1. The utility model provides a sand that flows is prevented on rich water sand bed and is gushed water work well which characterized in that: the working well structure comprises an underground continuous wall (1) and a grid cement-soil wall (2) arranged at the inlet and outlet sides of the underground continuous wall (1), the underground continuous wall comprises a reinforcement cage made of reinforcement (3) and concrete (4) poured in the reinforcement cage, an embedded steel ring (5) and an embedded bolt (6) are circumferentially arranged on the inner side of the steel reinforcement cage, an annular waterproof ring (7) is arranged on the inner side of the underground continuous wall (1), water-swelling rubber (8) is arranged between the annular waterproof ring (7) and the embedded steel ring (5), and the annular waterproof ring (7) is fixed with the embedded steel ring (5) through a steel pressure plate (9) and an embedded bolt (6), the annular waterproof ring (7) is made of elastic material, the inner diameter of the annular waterproof ring (7) is smaller than the outer diameter of the top pipe (10), so that the annular waterproof ring (7) is tightly attached to the top pipe (10) and deforms along the advancing direction of the top pipe (10).
2. The sand-flowing-out and water-inrush preventing working well for the water-rich sand layer is characterized in that the grid cement-soil wall (2) is in a multi-layer grid type, and at least part of the grid cement-soil wall (2) is arranged on the upper part of the outer wall of the underground continuous wall (1) in a clinging mode.
3. The sand-flowing and water-inrush preventing working well for the water-rich sand layer is characterized in that a straight steel sheet pile (11) is inserted into one layer of the grid cement-soil wall (2) close to the underground continuous wall (1).
4. The sand flow and water inrush preventing working well for the water-rich sand layer is characterized in that a plurality of grouting pipes (12) are arranged on the grid cement-soil wall (2) close to the inlet and outlet sides of the working well.
5. The working well of claim 1, characterized in that glass fiber reinforcement (14) and foam concrete (15) are arranged in a square shape at the opening (13) of the working well, damage to the embedded steel ring (5) and the embedded bolt (6) is prevented, and two ends of the glass fiber reinforcement (14) are in lap joint with the steel bar (3) of the underground continuous wall (1).
6. The working well of claim 1, characterized in that the embedded steel ring (5) and the embedded bolt (6) are wrapped by plastic film.
7. The working well for preventing the flowing sand from gushing water in the water-rich sand layer as claimed in claim 1, wherein the cross section of the embedded steel ring (5) is L-shaped.
8. The working well for preventing flowing sand from gushing water in the water-rich sand layer as claimed in claim 4, wherein the grouting pipe (12) is a steel pipe wrapped with filter cloth, and grouting holes are arranged on the steel pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120758363.7U CN215486037U (en) | 2021-04-14 | 2021-04-14 | Water-rich sand layer sand flow-proof water burst working well |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120758363.7U CN215486037U (en) | 2021-04-14 | 2021-04-14 | Water-rich sand layer sand flow-proof water burst working well |
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| CN215486037U true CN215486037U (en) | 2022-01-11 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113338947A (en) * | 2021-04-14 | 2021-09-03 | 浙江交工集团股份有限公司 | Sand-flowing-preventing water-gushing working well for water-rich sand layer and construction method thereof |
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2021
- 2021-04-14 CN CN202120758363.7U patent/CN215486037U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113338947A (en) * | 2021-04-14 | 2021-09-03 | 浙江交工集团股份有限公司 | Sand-flowing-preventing water-gushing working well for water-rich sand layer and construction method thereof |
| CN113338947B (en) * | 2021-04-14 | 2024-04-09 | 浙江交工集团股份有限公司 | Water-rich sand layer anti-flowing sand water-surge working well and construction method thereof |
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