CN104213553A - Construction technology for seamless impervious wall in vibration blunt caissons - Google Patents
Construction technology for seamless impervious wall in vibration blunt caissons Download PDFInfo
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Abstract
The invention provides a construction technology for a seamless impervious wall in vibration blunt caissons. According to a construction method of the seamless impervious wall, a vibration and jet flow punching mode is used for alternatively sinking two rectangular cross section caissons which guide for each other into the ground and pulling out the caissons, and slurry materials which comprise, by weight, 330-350 parts of silty clay, 30-50 parts of sodium bentonite, 200-220 parts of coal ash, 200-220 parts of cement and 660-680 parts of water are poured in the caisson vibrating and pulling process. The construction technology for the seamless impervious wall in the vibration blunt caisson has the advantages that the impervious wall is mainly made of natural raw materials or industrial waste materials without chemical additives, the cost is low, and environmental protection are achieved; the osmotic coefficient of a stone body is smaller than 1*10-7 cm/s, the compressive strength is 1-2 MPa, the elasticity modulus is smaller than 100 MPa, the blocking rate to main pollutants in landfill leachate reaches 95%, the impervious isolation effect is good, and the deformation prevention capacity is high; the wall forming technology that two caissons guide for each other and are alternatively sunk and pulled enables the impervious wall to be continuous, complete and free of seams, and the construction efficiency is high.
Description
Technical field
The present invention relates to a kind of underground impervious wall construction technique, especially relate to a kind of vibration crowded row foundation soil and jet cutting mode utilized the rectangular cross section caisson leading each other is alternately sunk to underground construction without the construction technique of seam seepage control wall.
Background technology
Impervious wall construction technology is widely used in hydraulic engineering, the engineering fields such as urban architecture base pit engineering and refuse landfill vertical seepage control.What extensively adopt at present has: the campshed technology such as deep-mixed pile, high-pressure rotary jet grouting pile, bored pile, long screw auger pressure deposited pile, and jetting is made the impervious wall construction technology such as groove, heavy model groove etc., and every kind of technology has its characteristics and available field separately.
Deep-mixed pile, high-pressure rotary jet grouting pile, bored pile, the campshed technology such as long screw auger pressure deposited pile are difficult for accomplishing in full accord because of pile body verticality, or stake footpath is because of very difficult assurance uniformities such as stratum reasons, so easily produce overlap joint bad with the problem such as intersect, and the slurry material of deep-mixed pile and high-pressure rotary jet grouting pile technology formation leakage proof wall is the underground mix of cement paste and original position soil, be difficult to guarantee evenly, so these methods exist localized seepage to be inevitable in various degree, as publication number CN1148492C patent " impervious cement-earth wall and construction method thereof " (00106109. 7) be deep-layer stirring campshed technology, the materials for wall adopting is the underground mix of cement paste and original position soil.
It is to utilize water jetting capstan engine first in underground grooving that water jetting is made groove impervious wall construction technology, pour into again wet concrete and become wall, its construction sequence is: first, utilize pressure flow impact failure sand, soil layer, utilize hoist engine to handle the upper and lower repeated stock of capstan engine simultaneously, its underpart cutter further destroys soil layer cutting finishing cell wall, by inverse circulation pump, water and sand mixture are pumped to ground, the final rectangular cross section one order slotted eye that forms, in slotted eye, pour into wet concrete, form an order concrete wall section at a series of intervals; Secondly, order concrete wall are intersegmental while making two order slotted eyes, utilize the effect of capstan engine side direction nozzle and wire brush that the both ends of the surface clay bruss of one order slotted eye wall is removed totally, in slotted eye, pour into wet concrete, just form a series of two order wall sections that connect with an order wall.Between visible wall section, be end face docking, certainly exist seam and folder mud phenomenon, and localized seepage.As publication number CN11207467C patent " application of water jetting plastic concrete cut-off wall in garbage sanitary filling field " (03 1 02554. 4) for water jetting, make groove impervious wall construction technology, the materials for wall proportioning of employing is: cement 220～230kg/m
3, flyash 60～70 kg/m
3, sand 1440～1450 kg/m
3, swell soil 75～80 kg/m
3part, water 327～332 kg/m
3, Admixture 0.15～0.30 %.
It is to utilize vibrating hammer by " H " shape or " I " shape shaped steel formation slotted eye of being driven underground that heavy modulus method is made groove impervious wall construction technology, in the process of extricating oneself from a predicament and brace oneself up to action, perfusion slurry material just forms a wall section, and the slotted eye edge of a wing that while then utilizing previous wall section construction, shaped steel forms is made guiding overlap joint and sunk to the shaped steel follow-up wall section of constructing.The method seems to have realized impervious wall without seam, but owing to utilizing the underground slotted eye edge of a wing to lead, on one side while sinking to shaped steel, be the flowable slurry material just having poured into, Yi Bian be harder soil layer, because sinking to deflection in process, unbalance stress shaped steel pours into the slotted eye of starching material unavoidably, and clamp-on the soil body and make its distortion, there is the problems such as body of wall folder mud, imperfect and localized seepage, and run into layer of sand or hardpan, resistance is large, only depend on vibration-sunk very difficult, speed is slow, has a strong impact on speed of application and efficiency.As publication number CN101200365.B patent " a kind of ' H ' type flexible concrete ultra-thin cut-off wall and construction method thereof " (200710304484. 9) make groove impervious wall construction technology for heavy modulus method, the materials for wall parts by weight that adopt are: 150～170 parts of portland cement or slag cements, 60～80 parts of sodium bentonites, 550～650 parts of limestone powders, 650～750 parts, water, dispersing agent 3.5～4. 8 parts, 3.0～6.0 parts of coupling agents.
As mentioned above, impervious wall slurry material generally adopts neat slurry, cement mortar, cement clay slurry etc. at present, and be added with a certain amount of chemical treatments, there is in various degree certain defect in its calculus body, as stir inequality, distortion bad adaptability, not environmental protection, be particularly useful for its blockage effect to pollutant of refuse landfill vertical seepage control indefinite etc.
Summary of the invention
Object of the present invention is just to provide a kind of shaking and rushes caisson without seam seepage control wall construction technology, to solve above-mentioned existing impervious wall construction technology, has bad, the intersection of overlap joint, seam, body of wall folder mud, imperfect, localized seepage; Impervious wall slurry material adds the inadequate environmental protection of chemical agent, low to pollutant retardance rate in garbage leachate; And on closely knit stratum or layer of sand caisson sinking speed and the problem such as efficiency of construction is low.
Technical scheme of the present invention is: the rectangular cross section caisson that utilizes hydraulic vibration driver vibration and jet cutting effect that two width are led each other alternately sinks to underground and extracts, and when extricating oneself from a predicament and brace oneself up to action caisson, the slurry material stirring is poured in it, the slurry material pouring into when caisson is extracted in it enters the mutual flow fused formation of the slurry material pouring into last wall section in slotted eye without seam seepage control wall, slurry material weight proportion is: 330～350 parts of silty clays, 30～50 parts of sodium bentonites, 200～220 parts, flyash, 200～220 parts of cement, 660～680 parts, water, its construction technology comprises:
(1) measuring orientation axis: by design impervious wall axial location measuring axis;
(2) divide construction section: press fixedly mud circulating system or a grouting equipment seat in the plane accessible Construction Anti-seepage wall length division construction section;
(3) excavation guide groove and sedimentation basin: while adopting jet to break ground technique, construction axis in construction forward position digs guide groove one, and divides and dig sedimentation basin and clear water reserviors by construction section, in order to mud circulation, purification and recycling;
(4) vibration caisson equipment and caisson are in place: by the orientation axis of measuring, will vibrate caisson equipment in place, and carry out leveling, and make column vertical, and then one of them caisson be mentioned and aim at slotted eye position;
(5) perfusion slurry material is prepared and is stirred: press 330～350 parts of silty clays, and 30～50 parts of sodium bentonites, 200～220 parts, flyash, 200～220 parts of cement, the weight fraction that water is 660～680 parts takes raw material, utilizes mixer to stir;
(6) caisson alternately sinks to and extricates oneself from a predicament and brace oneself up to action and pour into slurry material: soft soil horizon adopts static pressure and mode of vibration alternately to sink to caisson, chance sandy soils or hardpan employing vibration add jet cutting mode and accelerate to sink to caisson, caisson extricate oneself from a predicament and brace oneself up to action before slurry material of perfusion certain altitude in it, in the process of extricating oneself from a predicament and brace oneself up to action, keep its entoplasm material liquid level certain altitude until required slurry filling is complete, the caisson speed of extricating oneself from a predicament and brace oneself up to action is 1～3m/min.
The invention has the beneficial effects as follows: impervious wall slurry material is mainly natural material or industrial waste, and without chemical addition agent, expense is low, environmental protection; Calculus body transmission coefficient is less than 1 * 10
-7cm/s, compressive strength is 1～2MPa, modulus of elasticity is less than 100MPa, the retardance rate of major pollutants in garbage leachate reached more than 95%, good seepage-proof property, high to pollutant retardance rate, non-deformability is strong, is particularly suitable for refuse landfill vertical seepage control; Lead the each other punching of alternately shaking of two width caissons is sunk to and is extracted construction technology with vibration and become wall, makes impervious wall continuous whole without seam, can not produce wall section and intersect, and efficiency of construction is high.
accompanying drawing explanation
Accompanying drawing is construction flow chart of the present invention.
The specific embodiment
Referring to accompanying drawing, the rectangular cross section caisson that the present invention utilizes hydraulic vibration driver vibration and jet cutting mode that two width are led each other alternately sinks to underground and extracts, and when extricating oneself from a predicament and brace oneself up to action caisson, the slurry material stirring is poured in it and to form without seam seepage control wall, slurry material weight proportion is: 330～350 parts of silty clays, 30～50 parts of sodium bentonites, 200～220 parts, flyash, 200～220 parts of Portland cements, 660～680 parts, water, its construction technology comprises:
(1) measuring orientation axis: by design impervious wall axial location measuring axis;
(2) divide construction section: press fixedly mud circulating system or a grouting equipment seat in the plane accessible Construction Anti-seepage wall length division construction section, be generally 20m～30m;
(3) excavation guide groove and sedimentation basin: while adopting jet to break ground technique, construction axis in construction forward position digs together wide 0.4m left and right, the guide groove of dark 0.5m left and right, and divide and dig sedimentation basin and clear water reserviors by construction section, in order to mud circulation, purification and recycling;
(4) vibration caisson equipment and caisson are in place: by the orientation axis of measuring, will vibrate caisson equipment in place, and carry out leveling, and make column vertical, and then one of them caisson be mentioned and aim at slotted eye position;
(5) perfusion slurry material is prepared and is stirred: press 330～350 parts of silty clays, and 30～50 parts of sodium bentonites, 200～220 parts, flyash, 200～220 parts of Portland cements, the weight fraction that water is 660～680 parts takes raw material, utilizes mixer to stir;
(6) caisson alternately sinks to and extricates oneself from a predicament and brace oneself up to action and pour into slurry material: soft soil horizon adopts static pressure or mode of vibration alternately to sink to caisson, chance sandy soils or hardpan employing vibration add jet cutting mode and accelerate to sink to caisson, caisson extricate oneself from a predicament and brace oneself up to action before in it reperfusion serosity height should be not less than 3～5m, in the process of extricating oneself from a predicament and brace oneself up to action, should keep slurries liquid level in it to be not less than 2m until required slurry filling is complete, the caisson speed of extricating oneself from a predicament and brace oneself up to action is 1～3m/min.
The caisson that this construction technology adopts is that the patent of publication number CN202047418U " is shaken and rushed engagement type caisson device " (201120008548.2), and caisson lower end is the de-formula case point in the end, and short brink is engagement type conductor structure each other.
embodiment 1
the rectangular cross section caisson that utilizes hydraulic vibration driver vibration and jet cutting mode that two width are led each other alternately sinks to underground and extracts, and when extricating oneself from a predicament and brace oneself up to action caisson, the slurry material stirring is poured in it and to form without seam seepage control wall, slurry material weight proportion is: 350 parts of silty clays, 40 parts of sodium bentonites, 200 parts, III level flyash, 32.5 220 parts of Portland cements, 670 parts, water, its construction technology comprises:
(1) measuring orientation axis: by design impervious wall axial location measuring axis;
(2) divide construction section: by one fixedly mud circulating system or a grouting equipment seat in the plane accessible Construction Anti-seepage wall length to divide construction section be 20m;
(3) excavation guide groove and sedimentation basin: adopt vibration and the jet technique of breaking ground, construction axis in construction forward position digs wide 0.4m together, the guide groove of dark 0.5m, and by construction section, be divided in earth's surface and dig sedimentation basin and clear water reserviors, in order to mud circulation, purification and recycling;
(4) vibration caisson equipment and caisson are in place: by the orientation axis of measuring, will vibrate caisson equipment in place, and carry out leveling, and make column vertical, and then one of them caisson be mentioned to alignment slot hole site;
(5) perfusion slurry material is prepared and is stirred: press 350 parts of silty clays, and 40 parts of sodium bentonites, 200 parts, III level flyash, 32.5 220 parts of Portland cements, the weight fraction that water is 670 parts takes raw material, utilizes mixer to stir;
(6) caisson alternately sinks to and extricates oneself from a predicament and brace oneself up to action and starch material perfusion: employing hydraulic vibration driver vibrates and jet cutting effect is alternately sunk to and the two width caissons of extricating oneself from a predicament and brace oneself up to action, caisson extricate oneself from a predicament and brace oneself up to action before in it reperfusion serosity height should be not less than 5m, in the process of extricating oneself from a predicament and brace oneself up to action, keep slurries liquid level in it to be not less than 2m until required slurry filling is complete, the caisson speed of extricating oneself from a predicament and brace oneself up to action is 2m/min left and right.
embodiment 2
The rectangular cross section caisson that utilizes hydraulic vibration driver vibration and jet cutting mode that two width are led each other alternately sinks to underground and extracts, and when extricating oneself from a predicament and brace oneself up to action caisson, the slurry material stirring is poured in it and to form without seam seepage control wall, slurry material weight proportion is: 330 parts of silty clays, 50 parts of sodium bentonites, 200 parts, II level flyash, 32.5 200 parts of portland slag cements, 680 parts, water, its construction technology comprises:
(1) measuring orientation axis: by design impervious wall axial location measuring axis;
(2) divide construction section: by one fixedly mud circulating system or a grouting equipment seat in the plane accessible Construction Anti-seepage wall length to divide construction section be 25m;
(3) excavation guide groove and sedimentation basin: adopt vibration and the jet technique of breaking ground, construction axis in construction forward position digs wide 0.45m together, the guide groove of dark 0.55m, and by construction section, be divided in ground and dig sedimentation basin and clear water reserviors, in order to mud circulation, purification and recycling;
(4) vibration caisson equipment and caisson are in place: by the orientation axis of measuring, will vibrate caisson equipment in place, and carry out leveling, and make column vertical, and then one of them caisson be mentioned to alignment slot hole site;
(5) perfusion slurry material is prepared and is stirred: press 330 parts of silty clays, and 50 parts of sodium bentonites, 200 parts, II level flyash, 32.5 200 parts of portland slag cements, the weight fraction that water is 680 parts takes raw material, utilizes mixer to stir;
(6) caisson alternately sinks to and extracts and starch material perfusion: employing hydraulic vibration driver vibrates and jet cutting mode alternately sinks to and the two width caissons of extricating oneself from a predicament and brace oneself up to action, caisson extricate oneself from a predicament and brace oneself up to action before in it reperfusion serosity height should be not less than 4m, in the process of extricating oneself from a predicament and brace oneself up to action, keep slurries liquid level in it to be not less than 2m until required slurry filling is complete, the caisson speed of extricating oneself from a predicament and brace oneself up to action is 1.5m/min left and right.
embodiment 3
utilize the rectangular cross section caisson that hydraulic vibration driver leads two width each other alternately sink to underground and extract, and when extricating oneself from a predicament and brace oneself up to action caisson, the slurry material stirring is poured in it and to form without seam seepage control wall, slurry material weight proportion is: 350 parts of silty clays, 30 parts of sodium bentonites, 220 parts, III level flyash, 42.5 220 parts of Portland cements, 660 parts, water, its construction technology comprises:
(1) measuring orientation axis: by design impervious wall axial location measuring axis;
(2) divide construction section: by one fixedly mud circulating system or a grouting equipment seat in the plane accessible Construction Anti-seepage wall length to divide construction section be 30m;
(3) excavation guide groove and sedimentation basin: do not adopt the jet technique of breaking ground, construction axis in construction forward position digs wide 0.4m together, and the guide groove of dark 0.4m, does not dig sedimentation basin and clear water reserviors;
(4) vibration caisson equipment and caisson are in place: by the orientation axis of measuring, will vibrate caisson equipment in place, and carry out leveling, and make column vertical, and then one of them caisson be mentioned to alignment slot hole site;
(5) perfusion slurry material is prepared and is stirred: press 350 parts of silty clays, and 30 parts of sodium bentonites, 220 parts, III level flyash, 42.5 220 parts of Portland cements, the weight fraction that water is 660 parts takes raw material, utilizes mixer to stir;
(6) caisson alternately sinks to and extracts and starch material perfusion: adopt static pressure and hydraulic vibration driver mode of vibration alternately sinks to and the two width caissons of extricating oneself from a predicament and brace oneself up to action, caisson extricate oneself from a predicament and brace oneself up to action before in it reperfusion serosity height should be not less than 3m, in the process of extricating oneself from a predicament and brace oneself up to action, keep slurries liquid level in it to be not less than 2m until required slurry filling is complete, the caisson speed of extricating oneself from a predicament and brace oneself up to action is 3m/min left and right.
The above embodiment of the present invention is only for clearly illustrating how the present invention implements example, and is not the restriction to embodiment of the present invention.
Claims (2)
1. one kind is shaken and rushes caisson without seam seepage control wall construction technology, the rectangular cross section caisson that adopts vibration and jet cutting mode that two width are led each other alternately sinks to underground and extracts, and when extricating oneself from a predicament and brace oneself up to action caisson, the slurry material stirring is poured in it and to form without seam seepage control wall, it is characterized in that: impervious wall slurry material weight proportion is: 330～350 parts of silty clays, 30～50 parts of sodium bentonites, 200～220 parts, flyash, 200～220 parts of cement, 660～680 parts, water.
2. according to claim 1 shaking rushed caisson without seam seepage control wall construction technology, it is characterized in that: construction technology comprises: measuring orientation axis, divide construction section, excavation guide groove and sedimentation basin, vibration caisson equipment and caisson are in place, perfusion slurry material is prepared and is stirred, caisson alternately sink to underground with extract and pour into slurry material.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107290191A (en) * | 2016-03-31 | 2017-10-24 | 中国食品药品检定研究院 | A kind of micro- sample preparation device |
| CN110922110A (en) * | 2019-12-17 | 2020-03-27 | 河南省地质环境规划设计院有限公司 | Slurry wall for pollution site separation and pollution site separation control and treatment method |
| CN114956696A (en) * | 2022-04-15 | 2022-08-30 | 攀枝花学院 | Barrier wall material for blocking heavy metal and preparation method thereof |
| CN115417646A (en) * | 2022-09-29 | 2022-12-02 | 成都理工大学 | Controllable anti-seepage slurry and preparation method thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107290191A (en) * | 2016-03-31 | 2017-10-24 | 中国食品药品检定研究院 | A kind of micro- sample preparation device |
| CN107290191B (en) * | 2016-03-31 | 2024-04-23 | 中国食品药品检定研究院 | Microscopic sample preparation device |
| CN110922110A (en) * | 2019-12-17 | 2020-03-27 | 河南省地质环境规划设计院有限公司 | Slurry wall for pollution site separation and pollution site separation control and treatment method |
| CN114956696A (en) * | 2022-04-15 | 2022-08-30 | 攀枝花学院 | Barrier wall material for blocking heavy metal and preparation method thereof |
| CN115417646A (en) * | 2022-09-29 | 2022-12-02 | 成都理工大学 | Controllable anti-seepage slurry and preparation method thereof |
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Application publication date: 20141217 |