CN109898558B - Flushing and sinking device and flushing and sinking method for immersed tube - Google Patents
Flushing and sinking device and flushing and sinking method for immersed tube Download PDFInfo
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- CN109898558B CN109898558B CN201910186374.XA CN201910186374A CN109898558B CN 109898558 B CN109898558 B CN 109898558B CN 201910186374 A CN201910186374 A CN 201910186374A CN 109898558 B CN109898558 B CN 109898558B
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Abstract
The invention discloses a flushing and sinking device and a flushing and sinking method for a sinking pipe, which relate to the technical field of sinking pipe construction and aim to solve the technical problems that pipe grooves are difficult to dig and easy to collapse due to soft soil on a large river channel of a soft soil foundation.
Description
Technical Field
The invention relates to the technical field of immersed tube construction, in particular to immersed tube flushing and sinking equipment and an immersed tube flushing and sinking method.
Background
The traditional immersed tube adopts underwater pipe groove excavation and stone throwing for leveling, the steel pipe is assembled and then floated and transported in place, irrigation and sinking are carried out, underwater stone throwing is carried out for weight, backfill soil is used for restoring the elevation of a river bed, and finally flood control river banks on two sides of a river bank are restored according to the original standard. The pipeline trend should combine topography, engineering geology, arrange on gentle, the little straight river section of river water mainstream line swing.
The groove is constructed by adopting a traditional underwater large excavation method, and the main construction procedures are as follows: parameter calculation, measurement and setting-out, pipeline assembly welding, nondestructive testing, pressure testing, anticorrosion joint coating, pipe ditch excavation, sludge pumping, ditch bottom measurement, floating pipe settlement, pipeline measurement, pipe stabilization, backfill, bank protection and landform restoration. Most of the construction process is carried out on water, a dredger is used, and a diver needs to carry out auxiliary operation in the groove cleaning and pipe stabilizing stages. The immersed tube method has no requirement on the sites at both banks, is beneficial to the control of the elevation of the pipeline, does not influence the landscape at both banks and has short construction period. The river crossing is suitable for rivers which have larger crossing and higher landscape navigation requirements when no bridge is supported around.
However, when meeting the large river course of soft soil foundation, this layer of soil bearing capacity is lower, adopts traditional immersed tube scheme, and when excavating the trench, the trench is difficult to excavate and sinks easily, reduces the efficiency of construction, awaits improvement.
Disclosure of Invention
Aiming at the defects in the prior art, the first purpose of the invention is to provide a flushing and sinking device for a sinking pipe, which can smoothly sink the sinking pipe into the water bottom and improve the construction efficiency.
The above object of the present invention is achieved by the following technical solutions:
the utility model provides a dash and sink device for immersed tube, is used for spouting the towards mud ware of high-pressure rivers including setting up a plurality of in immersed tube downside, a plurality of towards mud ware is followed the axial setting of immersed tube, towards mud ware is connected with the water pump.
Through adopting above-mentioned technical scheme, when will sink the pipe and dash and sink, put into water simultaneously with towards the mud ware with sinking the pipe, sink the pipe and towards the mud ware and sink to submarine back, the water pump is with water input towards the mud ware in, towards the soil layer of mud ware with high pressure water directive immersed tube bottom for the soil liquefaction of immersed tube bottom loses bearing capacity, thereby the immersed tube can sink smoothly to the design elevation, with this mode that can replace excavation pipe chase, is favorable to improving engineering efficiency.
Furthermore, dash mud ware includes that two at least settings are in the floral tube of immersed tube downside, floral tube one end is sealed, the other end is connected with the hose, the hose is kept away from the one end of floral tube with the delivery port of water pump is connected, the floral tube is kept away from one side equipartition of immersed tube has a plurality of orifice, install the check valve on the lateral wall of orifice.
Through adopting above-mentioned technical scheme, will sink the pipe and sink to the bottom, through the water pump with water input floral tube in, spray high-pressure water to the bottom soil layer through the check valve at last, with soil liquefaction for the bottom soil layer loses bearing capacity, can sink the pipe with sinking to the bottom with this, has replaced the mode of excavation chase, is favorable to improving engineering efficiency.
Further, the angle between the adjacent floral tubes is 20-50 degrees.
By adopting the technical scheme, when the floral tubes sink, the water pressure sprayed by the floral tubes is equal by utilizing the angle between the floral tubes of 20-50 degrees, so that the possibility of generating deflection of the floral tubes is reduced.
Furthermore, the aperture of each spray hole is 2-30mm, the longitudinal distance between every two adjacent spray holes is 0.5-1m, and the angle between every two adjacent spray holes is 20-40 degrees.
By adopting the technical scheme, the soil layer below the immersed tube is liquefied by utilizing water sprayed from the uniformly distributed spray holes, so that the bearing capacity of the soil layer is reduced, and the immersed tube can be smoothly immersed into the water bottom.
Furthermore, a plurality of balancing weights are uniformly distributed on one side, far away from the mud flushing device, of the immersed tube.
Through adopting above-mentioned technical scheme, utilize the balancing weight to this recoil force that can reduce to strike submarine soil layer and bring for the immersed tube, the immersed tube of being convenient for sinks smoothly.
Another object of the present invention is to provide a method for sinking a sinking pipe, comprising the features of any one of claims 1 to 6, wherein the specific construction steps are as follows:
(1) respectively installing a strain gauge and a balancing weight on the upper side wall of the immersed tube, and installing a mud flushing device on the lower side wall of the immersed tube;
(2) the method comprises the following steps that a mud flushing device and a sinking pipe are immersed into water together, when the sinking pipe and the mud flushing device are immersed into the water bottom, water is input into a hose through a water pump, the hose inputs the water into the mud flushing device, a one-way valve enables high-pressure water to shoot to a soil layer at the bottom of the sinking pipe, so that the soil at the bottom of the sinking pipe is liquefied, a strain gauge detects strain borne by the sinking pipe in real time, data are transmitted to a stress detector, if the strain exceeds a set value, the water pressure sprayed out by the mud flushing device is controlled through the water pump, the sinking depth of the sinking pipe is adjusted, and the sinking difference generated during sinking of;
(3) until the immersed tube sinks to the designed elevation;
(4) the water pump is replaced by a slurry pump, cement is injected into the hose, the hose inputs cement slurry into the mud flushing device, and the mud flushing device ejects the cement slurry to form a pipeline foundation.
By adopting the technical scheme, before the immersed tube, the strain gauge, the balancing weight and the mud flusher are arranged on the side wall of the immersed tube, the immersed tube is immersed into water, when the immersed tube and the mud flusher are immersed into the water bottom, the water is input into the hose by the water pump, water flow enters the mud flusher along the hose, the check valve outputs high water pressure to liquefy the soil layer below the immersed tube and reduce the bearing capacity of the soil layer, so that the immersed tube can be smoothly immersed to the designed elevation, the water pump is replaced by a mud pump, cement is sequentially input into the hose and the mud flusher, and the mud flusher sprays cement paste to form a pipeline foundation so as to fix the pipeline; in the sinking process, the strain on the sinking of the sinking pipe is detected in real time through the strain gauge, so that the mud flusher can be adjusted in time, the sinking depth of the sinking pipe is adjusted, and the sinking pipe is prevented from sinking unevenly to cause the cracking of the sinking pipe.
Further, when the step (2) is implemented, a mud sucker of the river surface suction dredger is adopted to suck away the mud flushed by the mud flushing device.
By adopting the technical scheme, the mud-suction device of the river surface suction dredger is used for sucking away the mud inflated by the mud flushing device, so that the interference of liquefied mud on the sinking of the immersed tube is reduced, and the stable sinking of the immersed tube is facilitated.
Further, when the step (2) is implemented, the mud flusher positioned at the central section drives the immersed tube to sink to a depth not greater than 20cm, the mud flusher positioned at the central section sinks to the mud flushers at the two ends of the immersed tube to a depth not greater than 20cm in sequence, and the operation is repeated in a circulating mode until the immersed tube sinks to the designed elevation.
By adopting the technical scheme, the mud flusher positioned at the central section sinks firstly, and the mud flushers at the two sides of the central section sink sequentially towards the two ends of the central section, so that the sinking posture of the immersed tube can be adjusted in time, and the condition that the immersed tube sinks to bear larger strain and the immersed tube is broken is reduced.
In conclusion, the invention has the following beneficial effects:
1. the water is input into the mud flushing device by the water pump, the soil layer below the immersed tube is liquefied by the mud flushing device, and the soil layer loses bearing capacity, so that the immersed tube can be sunk to a designed elevation, a pipe groove excavating mode is replaced, and the engineering efficiency is improved;
2. the strain gauge is used for monitoring the strain borne by the immersed tube in real time, when the strain exceeds a set value, the mud flusher is adjusted, the sinking depth of the immersed tube is adjusted, the condition that the immersed tube sinks unevenly is reduced, and the possibility that the immersed tube is broken due to the large strain borne is reduced;
3. the mud is sucked away by the mud sucker of the river surface mud sucking boat, so that the interference of the mud on the sinking of the sinking pipe is reduced, and the stable sinking of the sinking pipe is facilitated.
Drawings
Fig. 1 is a schematic structural diagram showing a first embodiment.
Fig. 2 is a schematic structural view of a sludger according to an embodiment.
Fig. 3 is an enlarged view of a portion a in fig. 2.
In the figure: 1. sinking the pipe; 2. a mud flushing device; 20. a floral tube; 21. a hose; 22. spraying a hole; 23. a one-way valve; 3. a water pump; 5. and a balancing weight.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The first embodiment is as follows:
referring to fig. 1, the flushing and sinking device for the immersed tube comprises a plurality of mud flushing devices 2, preferably seven, which are arranged at the lower side of the immersed tube 1 and used for jetting high-pressure water flow, wherein the plurality of mud flushing devices 2 are arranged along the axial direction of the immersed tube 1, and the mud flushing devices 2 are connected with a water pump 3; the immersed tube 1 and the mud flushing device 2 are immersed in water, when the immersed tube and the mud flushing device are immersed in the water, the water pump 3 inputs water into the mud flushing device 2, the mud flushing device 2 enables high-pressure water to shoot to a soil layer below the immersed tube 1, the soil layer is liquefied, the bearing capacity of the soil layer is reduced, and the immersed tube 1 can be smoothly immersed in the water bottom, so that a mode of excavating a tube groove in the water bottom is replaced, and the construction efficiency is improved.
Referring to fig. 1, a plurality of balancing weights 5, preferably 600Kg of balancing weights 5, are uniformly distributed on one side of the immersed tube 1 away from the mud flushing device 2; through installing balancing weight 5 on immersed tube 1 to this recoil force that can reduce to strike the submarine soil layer and bring for immersed tube 1 is favorable to the stable sinking of immersed tube 1.
Referring to fig. 2, the mud flushing device 2 includes at least two perforated pipes 20, preferably three perforated pipes 20, disposed at the lower side of the sinking pipe 1, and the angle between the adjacent perforated pipes 20 is 20 degrees to 50 degrees, preferably 45 degrees; one end of the flower tube 20 is closed, the other end of the flower tube is connected with a hose 21, and one end of the hose 21, which is far away from the flower tube 20, is connected with a water outlet of the water pump 3.
Referring to fig. 3, a plurality of spray holes 22 are uniformly distributed on one side of the perforated pipe 20 away from the immersed tube 1, the aperture of each spray hole 22 is 2-30mm, the longitudinal distance between every two adjacent spray holes 22 is 0.5-1m, the angle between every two adjacent spray holes 22 is 20-40 degrees, and 30 degrees is preferential; a one-way valve 23 is arranged on the side wall of the spray hole 22; water pump 3 is along hose input floral tube 20 in, and the high pressure water is followed check valve 23 blowout, and the pressure of high pressure water is between 0.8~2.0Mpa, and check valve 23 can avoid the impurity in the water to get into floral tube 20 in, and high pressure rivers liquefy the soil layer of immersed tube 1 below, reduces the bearing capacity on soil layer, thereby immersed tube 1 can bury submarine smoothly to this replaces the mode at soil layer excavation pipe socket, improves the efficiency of construction.
The implementation principle of the above embodiment is as follows: through water pump 3 with water input towards mud ware 2 in, towards mud ware 2 with the soil layer of high pressure water-jet to immersed tube 1 below, the soil layer liquefies, thereby the bearing capacity is lost to the soil layer, thereby immersed tube 1 can immerse subaquely, has replaced the mode of excavation tube seat, has improved the efficiency of construction.
Example two:
a method for sinking and washing a sinking pipe comprises the following concrete construction steps:
(1) respectively installing a strain gauge and a balancing weight on the upper side wall of the immersed tube, and installing a mud flushing device on the lower side wall of the immersed tube;
(2) the method comprises the following steps that a mud flushing device and a sinking pipe are immersed into water together, when the sinking pipe and the mud flushing device are immersed into the water bottom, water is input into a hose through a water pump, the hose inputs the water into the mud flushing device, a one-way valve enables high-pressure water to shoot to a soil layer at the bottom of the sinking pipe, so that the soil at the bottom of the sinking pipe is liquefied, a strain gauge detects strain borne by the sinking pipe in real time, data are transmitted to a stress detector, if the strain exceeds a set value, the water pressure sprayed out by the mud flushing device is controlled through the water pump, the sinking depth of the sinking pipe is adjusted, and the sinking difference generated during sinking of; the mud flushing device at the central section drives the sinking pipe to sink to a depth of no more than 20cm, and the mud flushing device at the central section sinks to a depth of no more than 20cm in sequence towards the mud flushing devices at the two ends of the sinking pipe, and the mud flushing device is circulated;
(3) until the immersed tube sinks to the designed elevation;
(4) the water pump is replaced by a slurry pump, cement is injected into the hose, the hose inputs cement slurry into the mud flushing device, and the mud flushing device ejects the cement slurry to form a pipeline foundation.
The construction method comprises the following specific steps: firstly, the mud flushing device, the strain gauge and the balancing weight are arranged on the immersed tube, after the immersed tube and the mud flushing device are immersed to the water bottom, the water pump inputs water into the mud flusher along the hose, the mud flusher at the fourth section flushes high-pressure water to a soil layer below the immersed tube, the soil layer is liquefied, the mud sucker of the river surface suction dredger sucks away mud flushed by the mud flusher, the mud flushers at the third section and the fifth section drive the immersed tube to sink, the mud sucker of the river surface suction dredger sucks away mud flushed by the mud flusher, the mud flushers at the second section and the sixth section drive the immersed tube to sink, the mud sucker of the river surface suction dredger sucks away mud flushed by the mud flusher, the sinking depth of the mud flusher is not more than 20cm each time, and the strain gauge detects strain borne by the immersed tube in real time, when the pressure born by the immersed tube exceeds a set value, the water pressure ejected by the mud flushing device is adjusted, so that the uneven sinking of the immersed tube is reduced, and the immersed tube can be sunk to the water bottom.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.
Claims (6)
1. A dash and sink device for immersed tube which characterized in that: the device comprises a plurality of mud flushing devices (2) which are arranged on the lower side of an immersed tube (1) and used for jetting high-pressure water flow, wherein the plurality of mud flushing devices (2) are arranged along the axial direction of the immersed tube (1), and the mud flushing devices (2) are connected with a water pump (3);
towards mud ware (2) including at least two settings be in flower pipe (20) of immersed tube (1) downside, flower pipe (20) one end is sealed, the other end is connected with hose (21), hose (21) are kept away from the one end of flower pipe (20) with the delivery port of water pump (3) is connected, flower pipe (20) are kept away from one side equipartition of immersed tube (1) has a plurality of orifice (22), install check valve (23) on the lateral wall of orifice (22).
2. A washdown apparatus for a sink tube as claimed in claim 1, wherein: the angle between the adjacent floral tubes (20) is 20-50 degrees.
3. A washdown apparatus for a sink tube as claimed in claim 1, wherein: the diameter of the spray holes (22) is 2-30mm, the longitudinal distance between every two adjacent spray holes (22) is 0.5-1m, and the angle between every two adjacent spray holes (22) is 20-40 degrees.
4. A washdown apparatus for a sink tube as claimed in claim 1, wherein: a plurality of balancing weights (5) are uniformly distributed on one side of the immersed tube (1) far away from the mud flushing device (2).
5. A sink pipe flushing and sinking method is characterized in that: the sink device comprises the sink device of any one of claims 1 to 4, and comprises the following specific construction steps:
(1) respectively installing a strain gauge and a balancing weight on the upper side wall of the immersed tube, and installing a mud flushing device on the lower side wall of the immersed tube;
(2) the mud flusher and the sinking pipe are sunk into water together, when the sinking pipe and the mud flusher sink to the water bottom, water is input into the hose through the water pump, the hose inputs water into the mud flusher, the one-way valve sprays high-pressure water to the soil layer at the bottom of the sinking pipe to liquefy the soil at the bottom of the sinking pipe, the strain gauge detects the strain borne by the sinking pipe in real time and transmits data to the stress detector, if the strain exceeds a set value, the water pressure sprayed by the mud flusher is controlled through the water pump to adjust the sinking depth of the sinking pipe and control the sedimentation difference generated in the sinking of the sinking pipe, the mud flusher at the fourth section flushes the high-pressure water to the soil layer below the sinking pipe, the mud flushers at the third section and the fifth section sink with the sinking pipe, the mud flushers at the second section and the sixth section sink with the sinking pipe, the sinking depth of the mud flusher at each time is not more than 20cm and reciprocates cyclically, when the mud flusher approaches the water bottom, the mud, a mud sucker of the river surface suction dredger sucks away the mud;
(3) until the immersed tube sinks to the designed elevation;
(4) and replacing the water pump with a slurry pump, injecting cement slurry into the hose, inputting the cement slurry into the mud flushing device by the hose, and spraying the cement slurry out by the mud flushing device to form a pipeline foundation.
6. The sinking tube washdown method of claim 5, further comprising: and (3) when the step (2) is implemented, a mud sucker of the river surface mud sucking boat is adopted to suck away the mud flushed by the mud sucker.
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| CN201910186374.XA CN109898558B (en) | 2019-03-12 | 2019-03-12 | Flushing and sinking device and flushing and sinking method for immersed tube |
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| CN201910186374.XA CN109898558B (en) | 2019-03-12 | 2019-03-12 | Flushing and sinking device and flushing and sinking method for immersed tube |
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| CN109898558B true CN109898558B (en) | 2021-05-04 |
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| CN112815145B (en) * | 2021-01-06 | 2023-03-24 | 中国化学工程第十一建设有限公司 | Double-pipe immersed pipe construction method and heating pipeline system |
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| JP4069266B2 (en) * | 1998-06-09 | 2008-04-02 | 徹 飯島 | Method for reducing hydrodynamic force of underwater structure and hydrodynamic force reducing type underwater structure |
| JP3992854B2 (en) * | 1998-09-14 | 2007-10-17 | 株式会社東洋電機工業所 | Underwater drilling device capable of jetting jet water and underwater drilling device capable of jetting jet air |
| FR2870269B1 (en) * | 2004-05-12 | 2006-08-11 | Bouygues Travaux Publics Sa | METHOD AND DEVICE FOR REALIZING AN IMMERSION TUNNEL ON A FLOOR UNDER A WATER TABLE |
| CN201588196U (en) * | 2010-01-26 | 2010-09-22 | 何建新 | Horizontal directional vibration immersed pipe device |
| CN102465537A (en) * | 2010-11-05 | 2012-05-23 | 任立蓬 | Method for building tunnel on sediment river |
| CN104297447B (en) * | 2013-11-14 | 2017-05-31 | 长安大学 | The physical simulating method that a kind of surface subsidence influences on subway tunnel |
| CN108643258A (en) * | 2018-04-28 | 2018-10-12 | 中交航局第工程有限公司 | A kind of waterpower punching clears the construction method for the excavation submarine cable that becomes silted up |
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