CN105113530A - Caisson aid-sinking process adopting high-pressure injection - Google Patents
Caisson aid-sinking process adopting high-pressure injection Download PDFInfo
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- CN105113530A CN105113530A CN201510491885.4A CN201510491885A CN105113530A CN 105113530 A CN105113530 A CN 105113530A CN 201510491885 A CN201510491885 A CN 201510491885A CN 105113530 A CN105113530 A CN 105113530A
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Abstract
The invention relates to a caisson aid-sinking process adopting high-pressure injection. Aid-sinking is carried out by using a high pressure jet grouting rig or by jetting high pressure water and compressed air. The aid-sinking process by using the high pressure jet grouting rig comprises the steps as follows: under the condition that when a caisson sinks and meets a hard geological structure, a 6-inch PVC (polyvinyl chloride) pipe is arranged on the inner wall of the caisson in advance; a working platform is set up at the top of the caisson; the high pressure jet grouting rig is used for inserting a drill rod into the 6-inch PVC pipe on the platform; and ultrahigh-pressure water is jetted towards foot blades of the caisson, soil mass at the lower parts of the foot blades is destroyed, and caisson sinking is facilitated. The aid-sinking process by jetting high pressure water and compressed air comprises the steps as follows: a 2-inch high-pressure pipe and a 6-fen air pipe are inserted into the 6-inch PVC pipe which is buried in the wall of the caisson in advance; and a high-pressure pump outputs high-pressure water through the high-pressure pipe, and an air compressor jets high-pressure water and compressed air through the air pipe, so that soil mass at the lower parts of the foot blades is destroyed, and caisson sinking is facilitated. According to the process, the problem that under a hard geological condition, extra-deep caisson sinking is carried out by using a non-drainage sinking process, and soil at the lower parts of the foot blades is difficult to take out is solved, and under a complicated geological condition, the caisson sinking construction technology can be further applied.
Description
Technical field
The present invention relates to a kind of open caisson and help heavy innovation technique, especially a kind of open caisson of high-pressure injection that adopts helps heavy technique.
Background technology
Open caisson construction method develops into a kind of form imbedding various undergrounds industrial construction and civil air defense constructions and installations space enclosing structure in Soft Soil Layer gradually.Along with China is for the further raising of environmental requirement, coastal area industrial wastewater and city domestic sewage need carry out deep sea emission, and open caisson is further obvious as indirect force point effect in extra long distance pipeline laying.For overcoming the construction Difficulties of well sinking under complex geological condition, must the heavy technology and equipment that helps in well sinking process be researched and developed.
Summary of the invention
The present invention will provide a kind of high-pressure injection open caisson to help heavy technique, passes through this technical problem of complex geological condition for helping to solve ultra-deep open caisson.
For achieving the above object, technical scheme of the present invention is: a kind of high-pressure injection open caisson helps heavy technique, high-pressure rotary-spray rig is adopted to help heavy or inject high pressure water and compressed air to help heavy, described high-pressure rotary-spray rig helps heavy step to be: under well sinking meets hard geological condition, in advance at the built-in 6 cun of pvc pipes of caisson wall, job platform is set up at open caisson top, drilling rod inserts in 6 cun of pvc pipes by high-pressure rotary-spray rig on platform, and sprays high-pressure water destruction sword underfooting portion soil body help open caisson to caisson cutting edge; Described inject high pressure water and compressed air help heavy step to be: 2 cun of high-voltage tubes and 6 gas-distributing pipes are inserted in 6 cun of pre-buried pvc pipes of the borehole wall, pass through 6 gas-distributing pipe inject high pressure water and compressed air by ground high-pressure pump by 2 cun of high-voltage tubes output water under high pressures and air compressor machine, the soil body destroying sword underfooting portion helps well sinking.
Described high-pressure rotary-spray rig helps heavy concrete grammar: set up a width at open caisson top at 5m ring-shaped platform, the movement of high-pressure rotary-spray rig is moved by the 25T mobile crane at scene, the degree of depth that jet drill rig drilling rod inserts in 6 cun of pre-buried pvc pipes of the borehole wall reaches below sword pin 2m, spray high-pressure water by platform operations personnel and destroy the sword underfooting portion soil body, high-pressure rotary-spray rig sprays 3 times up and down again.
Described inject high pressure water and compressed air help heavy concrete grammar: place a 60kg/cm on ground
2high-pressure pump and a box air compressor machine, by 2 cun of high-pressure water pipe and 6 gas-distributing pipes, high-pressure pump, air compressor machine are connected, with 25t mobile crane, high-pressure injection pipeline is inserted in 6 cun of pre-buried pvc pipes of the borehole wall, ground handling operator starts high-pressure pump and air compressor machine, pipeline press-in water under high pressure and compressed air, high-pressure injection pipeline is slowly transferred by crane, helps well sinking by water under high pressure and the empty sword underfooting portion soil body that destroys of compression.
The invention has the beneficial effects as follows: by 6 cun of pvc pipes pre-buried in the borehole wall, the different equipment of two covers can be adopted to carry out open caisson and help heavy construction.1, adopt high-pressure rotary-spray rig to help heavy, high-pressure water (pressure can reach 26MPa) can be sprayed to caisson cutting edge and destroy sword underfooting portion soil body help well sinking.2, adopt inject high pressure water and compressed air to help heavy, again develop equipment nozzle, the aerator of increase can solve under the condition of high hydraulic pressure, and the problem of the pressure reduction of 2 writing brush road water under high pressures, improves efficiency of breaking ground.
Accompanying drawing explanation
Fig. 1 is that high-pressure rotary-spray helps heavy working drawing;
Fig. 2 is nozzle arrangements figure.
Detailed description of the invention
Below in conjunction with accompanying drawing and embodiment, the present invention is further illustrated.
As shown in Figure 1, high-pressure rotary-spray helps to sink and comprises open caisson top platform 2, high-pressure rotary-spray rig 1 and pre-buried 6 cun of pvc pipes 3.
Site operation flow process is as follows:
A width is set up at 5m ring-shaped platform 2 at open caisson top, the movement of high-pressure rotary-spray rig 1 is moved by the 25T mobile crane at scene, high-pressure rotary-spray rig 1 drilling rod is inserted in 6 cun of pre-buried pvc pipes 3 of the borehole wall, insertion depth reaches below sword pin 2m, by platform operations personnel, spray high-pressure water destroy the sword underfooting portion soil body, rig sprays 3 times up and down again.
The present invention comprises air inlet, water feed apparatus, and corollary equipment comprises air compressor machine, high-pressure pump and 2 little progress water lines and 6 branched inlet pipes.High-pressure pump is connected nozzle respectively by 2 little progress water lines with 6 branched inlet pipes with air compressor machine, and as shown in Figure 2, nozzle is provided with water inlet 4, delivery port 5, air inlet port 6, gas outlet 7.
Site operation flow process is as follows:
A 60kg/cm is placed on ground
2high-pressure pump and a box air compressor machine, by 2 cun of high-pressure water pipe and 6 gas-distributing pipes, high-pressure pump, air compressor machine are connected with novel device, with 25t mobile crane, high-pressure injection pipeline is inserted in 6 cun of pre-buried pvc pipes of the borehole wall, ground handling operator starts high-pressure pump and air compressor machine, pipeline press-in water under high pressure and compressed air, equipment is slowly transferred by crane, helps well sinking by this damage of facilities sword underfooting portion soil body.
Application implementation example of the present invention
Engineering is positioned at offshore sea waters, the North Sea, and engineering entity is the sewage steel pipe of 1 external diameter 2000mm, wall thickness 22mm, sewage conduct length 3600m, is divided into two sections of (2180m push pipe section 1+1420m push pipe section 2) jacking constructions.Arrange 2 open caissons as push pipe starting well, inshore side arranges the starting well of 1# open caisson as push pipe section 1, and the received well that 2# open caisson is push pipe section 1 is the starting well of push pipe section 2.
This engineering 2 open caissons are all positioned on 2 man-made islands in marine site, well sinking need pass through complicated stratum, comprise 10., (12) medium coarse sand and 8., (11) silty clay, open caisson need adopt non-drainage subsidence technique, there is not the bad phenomenon such as drift sand at sinking watching in guarantee, guarantees the Stability Analysis of Structures of man-made island.Silty clay layer (bearing capacity f can be passed through smoothly by open caisson to make open caisson
ak=280KPa, cohesion force C=50KPa), it is heavy that research and development " high-pressure injection " equipment helps for open caisson, can save a large amount of human and material resources and financial resources, for engineering brings good benefit.
Claims (3)
1. a high-pressure injection open caisson helps heavy technique, it is characterized in that, high-pressure rotary-spray rig is adopted to help heavy or inject high pressure water and compressed air to help heavy, it is characterized in that: described high-pressure rotary-spray rig helps heavy step to be: under well sinking meets hard geological condition, in advance at the built-in 6 cun of pvc pipes of caisson wall, set up job platform at open caisson top, drilling rod inserts in 6 cun of pvc pipes by high-pressure rotary-spray rig on platform, and sprays high-pressure water destruction sword underfooting portion soil body help open caisson to caisson cutting edge; Described inject high pressure water and compressed air help heavy step to be: 2 cun of high-voltage tubes and 6 gas-distributing pipes are inserted in 6 cun of pre-buried pvc pipes of the borehole wall, pass through 6 gas-distributing pipe inject high pressure water and compressed air by ground high-pressure pump by 2 cun of high-voltage tubes output water under high pressures and air compressor machine, the soil body destroying sword underfooting portion helps well sinking.
2. high-pressure injection open caisson according to claim 1 helps heavy technique, it is characterized in that: described high-pressure rotary-spray rig helps heavy concrete grammar: set up a width at open caisson top at 5m ring-shaped platform, the movement of high-pressure rotary-spray rig is moved by the 25T mobile crane at scene, the degree of depth that jet drill rig drilling rod inserts in 6 cun of pre-buried pvc pipes of the borehole wall reaches below sword pin 2m, spray high-pressure water by platform operations personnel and destroy the sword underfooting portion soil body, high-pressure rotary-spray rig sprays 3 times up and down again.
3. high-pressure injection open caisson according to claim 1 helps heavy technique, it is characterized in that: described inject high pressure water and compressed air help heavy concrete grammar: place a 60kg/cm on ground
2high-pressure pump and a box air compressor machine, by 2 cun of high-pressure water pipe and 6 gas-distributing pipes, high-pressure pump, air compressor machine are connected, with 25t mobile crane, high-pressure injection pipeline is inserted in 6 cun of pre-buried pvc pipes of the borehole wall, ground handling operator starts high-pressure pump and air compressor machine, pipeline press-in water under high pressure and compressed air, high-pressure injection pipeline is slowly transferred by crane, helps well sinking by water under high pressure and the empty sword underfooting portion soil body that destroys of compression.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510491885.4A CN105113530A (en) | 2015-08-12 | 2015-08-12 | Caisson aid-sinking process adopting high-pressure injection |
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| CN201510491885.4A CN105113530A (en) | 2015-08-12 | 2015-08-12 | Caisson aid-sinking process adopting high-pressure injection |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106522254A (en) * | 2016-11-09 | 2017-03-22 | 中钢集团武汉安全环保研究院有限公司 | Novel explosion sinking assistance method for open caisson |
| CN108086163A (en) * | 2017-12-28 | 2018-05-29 | 中国葛洲坝集团第二工程有限公司 | Concrete open caisson high-pressure rotary-spray antiseepage cofferdam construction method |
| CN108643215A (en) * | 2018-05-09 | 2018-10-12 | 江西博慧工程技术服务有限公司 | Anchor pier formula foundation construction method after a kind of churning indentation variable cross-section |
| CN109826217A (en) * | 2019-01-07 | 2019-05-31 | 中交第二航务工程局有限公司 | Using the construction method of convolution drilling machine auxiliary open caisson non-drainage subsidence |
| CN110397057A (en) * | 2019-07-31 | 2019-11-01 | 武汉市市政建设集团有限公司 | A kind of soft soil area Self-sinking type steel open caisson support system and method |
| CN112459098A (en) * | 2020-11-13 | 2021-03-09 | 中交二航局第四工程有限公司 | Centralized water and gas supply system and method for large open caisson mud suction sinking construction |
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| JPS63206527A (en) * | 1987-02-20 | 1988-08-25 | Shimizu Constr Co Ltd | Settling promoting work for caisson |
| DE4025176A1 (en) * | 1990-08-08 | 1992-02-13 | Adolf Traunbauer | Basement construction in water-bearing ground - has frame for walls constructed, lowered and soil is pumped out |
| CN2611437Y (en) * | 2003-04-09 | 2004-04-14 | 王民寿 | Headframe structure with fast open caisson |
| CN101845820A (en) * | 2009-10-10 | 2010-09-29 | 中交二公局第二工程有限公司 | Sinking-assistant construction method for sinking sunk well |
| CN101922151A (en) * | 2010-07-28 | 2010-12-22 | 崔冰 | Novel sinking assistant system for land sunk well |
| CN103114603A (en) * | 2013-02-27 | 2013-05-22 | 上海市基础工程有限公司 | Air curtain resistance reducing and sinking assisting device utilized during sinking construction for sinking well |
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63206527A (en) * | 1987-02-20 | 1988-08-25 | Shimizu Constr Co Ltd | Settling promoting work for caisson |
| DE4025176A1 (en) * | 1990-08-08 | 1992-02-13 | Adolf Traunbauer | Basement construction in water-bearing ground - has frame for walls constructed, lowered and soil is pumped out |
| CN2611437Y (en) * | 2003-04-09 | 2004-04-14 | 王民寿 | Headframe structure with fast open caisson |
| CN101845820A (en) * | 2009-10-10 | 2010-09-29 | 中交二公局第二工程有限公司 | Sinking-assistant construction method for sinking sunk well |
| CN101922151A (en) * | 2010-07-28 | 2010-12-22 | 崔冰 | Novel sinking assistant system for land sunk well |
| CN103114603A (en) * | 2013-02-27 | 2013-05-22 | 上海市基础工程有限公司 | Air curtain resistance reducing and sinking assisting device utilized during sinking construction for sinking well |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106522254A (en) * | 2016-11-09 | 2017-03-22 | 中钢集团武汉安全环保研究院有限公司 | Novel explosion sinking assistance method for open caisson |
| CN108086163A (en) * | 2017-12-28 | 2018-05-29 | 中国葛洲坝集团第二工程有限公司 | Concrete open caisson high-pressure rotary-spray antiseepage cofferdam construction method |
| CN108643215A (en) * | 2018-05-09 | 2018-10-12 | 江西博慧工程技术服务有限公司 | Anchor pier formula foundation construction method after a kind of churning indentation variable cross-section |
| CN109826217A (en) * | 2019-01-07 | 2019-05-31 | 中交第二航务工程局有限公司 | Using the construction method of convolution drilling machine auxiliary open caisson non-drainage subsidence |
| CN110397057A (en) * | 2019-07-31 | 2019-11-01 | 武汉市市政建设集团有限公司 | A kind of soft soil area Self-sinking type steel open caisson support system and method |
| CN110397057B (en) * | 2019-07-31 | 2024-05-14 | 武汉市市政建设集团有限公司 | Self-sinking type steel open caisson supporting system and method for soft soil area |
| CN112459098A (en) * | 2020-11-13 | 2021-03-09 | 中交二航局第四工程有限公司 | Centralized water and gas supply system and method for large open caisson mud suction sinking construction |
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Application publication date: 20151202 |