CN103437337A - Method for reinforcing soft soil foundation in cushion layer replacement mode - Google Patents
Method for reinforcing soft soil foundation in cushion layer replacement mode Download PDFInfo
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- CN103437337A CN103437337A CN2013103657985A CN201310365798A CN103437337A CN 103437337 A CN103437337 A CN 103437337A CN 2013103657985 A CN2013103657985 A CN 2013103657985A CN 201310365798 A CN201310365798 A CN 201310365798A CN 103437337 A CN103437337 A CN 103437337A
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Abstract
The invention relates to a method for reinforcing soft soil foundation in a cushion layer replacement mode. The method for reinforcing the soft soil foundation in the cushion layer replacement mode comprises the steps that (1) a position to be excavated is marked out in the soft soil foundation and an excavator is arranged at the position to be excavated; (2) a pit slot is excavated through the excavator and a soil layer and surface dust are cleaned up; (3) filling-replacement filling materials are prepared; (4) the filling-replacement filling materials are filled in the pit slot and are paved flatly and smoothly; (5) a vibration roller is used for grinding the pit slot filled with the filled filling-replacement filling materials; (6) the surface of the filling-replacement filling materials is kept being wet after being grinded, maintenance is started after the filling-replacement filling materials are finally coagulated, and the maintenance time is 30 to 40 days. Compared with the prior art, the method for reinforcing the soft soil foundation in the cushion layer replacement mode enables the soft soil foundation to be high in reinforcing quality, high in intensity, convenient to construct, low in cost, and significant in economical benefit.
Description
Technical field
The present invention relates to a kind of method of reinforcing soft ground, especially relate to a kind of employing and change the method for filling out bed course mode reinforcing soft ground.
Background technology
Along with the power grid construction develop rapidly, the basic engineering of transmission line of electricity, be related to the safe operation of circuit, more is related to investment and the comprehensive benefit of engineering.Basic pattern commonly used is at present: 1. slab foundation; 2. these two kinds of patterns of bored pile foundation.Wherein the straight column type basis is generally used for geological condition area preferably, and bored concrete pile foundation is generally used for the geology unfavorable areas such as river embankment, weak soil.
At soft soil areas, because its pole and tower foundation design not only will meet general pole and tower foundation designing requirement, also should meet the requirements such as column foot sedimentation amount, gradient, so the soft soil areas pole and tower foundation is designed with its particularity.Because there were many weak points in China in the research aspect the processing of soft soil areas ground and pole and tower foundation thereof in the past, cause soft soil areas pole and tower foundation design level lower, compare the gap that existence is larger with international most advanced level, the ratio of the cost of its foundation the line is busy road overall investment is generally in 25% left and right, what have is even higher, and the not research of carrying out ground stabilization and processing of system, therefore the soft soil areas pole and tower foundation has become link very weak in transmission line construction, ground is processed and design optimization is soft soil areas work transmission line key subjects in the urgent need to address.
At present, in soft clay area, use board-like shallow foundation that following problem is arranged:
(1) bearing capacity of foundation soil of bearing stratum is lower, the overburden layer of shallow-layer is thicker, caused for general steel tower shallow foundation (slab foundation) and compared and need to take larger area, darker embedded depth of foundation with other areas, the excavated volume of the cubic metre of earth and stone is large, and concrete and amount of reinforcement are also large.
(2) the slab foundation baseplate width is large, and basis is subject to external disturbance large, as inhomogeneous preloading or excavation fish pond, ditch etc. are arranged near the tower position, all can cause the stability of basic foundation to be damaged.
(3) for larger steel towers of foundation bearing capacity such as same tower four loops, 500kV circuits, if adopt slab foundation, baseplate width can be very large, and even slab foundation can't meet design requirement, and therefore all needs to adopt bored pile foundation completely.And pile foundation belongs to deep foundation, investment cost is large, its cost is slab foundation 2～4 times, this makes the foundation cost of whole piece circuit very high.
Therefore, under current background, how to enlarge the scope of application of shallow foundation, how the ground of shallow foundation is taked to suitable foundation treatment mode, reduce the shallow foundation floor space, reduce basic material usage, reduce the usage ratio of bored pile in circuit, make shallow foundation have more reasonability and economy at aspects such as floor space, comprehensive costs, will become key one ring of control engineering cost.
Summary of the invention
Purpose of the present invention is exactly to provide the employing simple, that reduce cost of production, reliable construction quality of a kind of job practices to change the method for filling out bed course mode reinforcing soft ground in order to overcome the defect that above-mentioned prior art exists.
Purpose of the present invention can be achieved through the following technical solutions:
The method of filling out bed course mode reinforcing soft ground is changed in a kind of employing, and the method comprises the following steps:
(1) mark the position that will excavate on soft foundation, and excavator is placed in to place to be dug;
(2) excavation hole groove: adopt excavator to excavate the hole groove, and soil layer and the surface dust that will cheat in groove are removed clean;
(3) filler is changed in preparation:
The material of following weight portion is stirred to form with mixer and change filler: 100 parts, water, 90～130 parts of cement, 150～190 parts, flyash, rubble or 1500～2500 parts;
(4) filler paving: will change filler and insert in the groove of hole, and it is smooth to pave;
(5) roll: use vibratory roller to be rolled filling in the hole groove that changes filler;
(6) maintenance: roll the surface wettability that filler is changed in rear maintenance, to after changing filler final set, starting maintenance, curing time is 30～40 days.
The degree of depth of described hole groove is 0.5～3 meter.
The described filler of step (4) the concrete steps that pave are: needs are changed to the hole bottom land layer watering of filling out and soak, use road roller precompressed 1～2 time; Then layering paves, and according to the needs that pave of shallow principle after first dark, changes the position of filling out, and every layer of THICKNESS CONTROL paved is at 40～50cm.
The described concrete steps that roll of step (5) are: use vibratory roller to be rolled, while rolling, trailing wheel overlapping 1/2 is taken turns wide, trailing wheel must surpass the seam crossing of two sections, and rear wheel load is complete when wide, is one time, roll 7～10 times, meet the requirements of compactness and stop.
Compared with prior art, the present invention has the following advantages and beneficial effect:
1. with other Ground Treatment mode, compare, the inventive method can be saved great deal of steel; In the present invention, change filler and easily configure, cost is lower;
2. work progress of the present invention is simple, does not need expensive plant equipment, and construction quality is easy to control and guarantee, and can carry out the larger area reinforcement of soft soil.
3. method cost of the present invention is low, remarkable in economical benefits.
4. applied widely to soft foundation of method of the present invention, the grounds such as mud, mucky soil, cohesive soil, silt, loess, sand, artificial earth fill and gravelly soil are all used method of the present invention.
The specific embodiment
Below in conjunction with specific embodiment, the present invention is described in detail.
Embodiment
The method of filling out bed course mode reinforcing soft ground is changed in a kind of employing, and the method comprises the following steps:
(1) mark the position that will excavate on soft foundation, and excavator is placed in to place to be dug;
(2) excavation hole groove: adopt excavator to excavate the hole groove, the degree of depth of hole groove is 0.5～3 meter, and soil layer and the surface dust that will cheat in groove are removed clean;
(3) filler is changed in preparation:
The material of following weight portion is stirred to form with mixer and change filler: 100 parts, water, 90～130 parts of cement, 150～190 parts, flyash, rubble or 1500～2500 parts;
(4) filler paving: needs are changed to the hole bottom land layer watering of filling out wetting, use road roller precompressed 1～2 time; Then layering paves, and according to the needs that pave of shallow principle after first dark, changes the position of filling out, and every layer of THICKNESS CONTROL paved is at 40～50cm;
(5) roll: use vibratory roller to be rolled, while rolling, trailing wheel overlapping 1/2 is taken turns wide, and trailing wheel must surpass the seam crossing of two sections, and rear wheel load is complete when wide, is one time, rolls 7～10 times, meets the requirements of compactness and stops;
(6) maintenance: roll the surface wettability that filler is changed in rear maintenance, to after changing filler final set, starting maintenance, curing time is 30～40 days.
Claims (4)
1. the method for filling out bed course mode reinforcing soft ground is changed in an employing, it is characterized in that, the method comprises the following steps:
(1) mark the position that will excavate on soft foundation, and excavator is placed in to place to be dug;
(2) excavation hole groove: adopt excavator to excavate the hole groove, and soil layer and the surface dust that will cheat in groove are removed clean;
(3) filler is changed in preparation:
The material of following weight portion is stirred to form with mixer and change filler: 100 parts, water, 90～130 parts of cement, 150～190 parts, flyash, rubble or 1500～2500 parts;
(4) filler paving: will change filler and insert in the groove of hole, and it is smooth to pave;
(5) roll: use vibratory roller to be rolled filling in the hole groove that changes filler;
(6) maintenance: roll the surface wettability that filler is changed in rear maintenance, to after changing filler final set, starting maintenance, curing time is 30～40 days.
2. the method for filling out bed course mode reinforcing soft ground is changed in a kind of employing according to claim 1, it is characterized in that, the degree of depth of described hole groove is 0.5～3 meter.
3. the method for filling out bed course mode reinforcing soft ground is changed in a kind of employing according to claim 1, it is characterized in that, the described filler of step (4) the concrete steps that pave are:
Needs are changed to the hole bottom land layer watering of filling out and soak, use road roller precompressed 1～2 time; Then layering paves, and according to the needs that pave of shallow principle after first dark, changes the position of filling out, and every layer of THICKNESS CONTROL paved is at 40～50cm.
4. the method for filling out bed course mode reinforcing soft ground is changed in a kind of employing according to claim 1, it is characterized in that, the described concrete steps that roll of step (5) are:
Use vibratory roller to be rolled, while rolling, trailing wheel overlapping 1/2 is taken turns wide, and trailing wheel must surpass the seam crossing of two sections, and rear wheel load is complete when wide, is one time, rolls 7～10 times, meets the requirements of compactness and stops.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103657985A CN103437337A (en) | 2013-08-21 | 2013-08-21 | Method for reinforcing soft soil foundation in cushion layer replacement mode |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013103657985A CN103437337A (en) | 2013-08-21 | 2013-08-21 | Method for reinforcing soft soil foundation in cushion layer replacement mode |
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| CN103437337A true CN103437337A (en) | 2013-12-11 |
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| CN2013103657985A Pending CN103437337A (en) | 2013-08-21 | 2013-08-21 | Method for reinforcing soft soil foundation in cushion layer replacement mode |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104018485A (en) * | 2014-06-18 | 2014-09-03 | 东南大学 | Bed course replacing and filling and carbonization reinforcing method of soft soil foundation |
| CN105297700A (en) * | 2015-10-15 | 2016-02-03 | 中国建筑第八工程局有限公司 | Method for treating sludge or quicksand foundation |
| CN106638544A (en) * | 2016-12-26 | 2017-05-10 | 中冶天工集团有限公司 | Anti-seepage and anti-cracking construction method for ultra-large reinforced concrete bio-oxidation pond in cold area |
| CN108894209A (en) * | 2018-06-26 | 2018-11-27 | 中国电力工程顾问集团华东电力设计院有限公司 | The processing method and application of liquefied silt ground |
| CN109868700A (en) * | 2019-01-23 | 2019-06-11 | 杜毅 | A kind of highway engineering construction soft groundsill reinforcing equipment and reinforcement means |
| CN112095381A (en) * | 2020-09-17 | 2020-12-18 | 中国十七冶集团有限公司 | Construction method for soft roadbed treatment |
| CN113356176A (en) * | 2021-07-15 | 2021-09-07 | 重庆尚源建筑景观设计有限公司 | Soft foundation treatment method |
| CN113417273A (en) * | 2021-06-29 | 2021-09-21 | 中铁十八局集团第一工程有限公司 | Silt stratum underground pipe gallery foundation sand replacement and filling reinforcement method |
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| JPS61106817A (en) * | 1984-10-31 | 1986-05-24 | Shinwa Kousetsu Kk | Method of replacing ground with crushed stones |
| CN101265701A (en) * | 2007-03-16 | 2008-09-17 | 张伯谦 | Soft soil foundation reinforcing means |
| CN101974898A (en) * | 2010-11-03 | 2011-02-16 | 成都四海岩土工程有限公司 | Roller compacted concrete cushion changing and filling method |
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2013
- 2013-08-21 CN CN2013103657985A patent/CN103437337A/en active Pending
Patent Citations (3)
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| JPS61106817A (en) * | 1984-10-31 | 1986-05-24 | Shinwa Kousetsu Kk | Method of replacing ground with crushed stones |
| CN101265701A (en) * | 2007-03-16 | 2008-09-17 | 张伯谦 | Soft soil foundation reinforcing means |
| CN101974898A (en) * | 2010-11-03 | 2011-02-16 | 成都四海岩土工程有限公司 | Roller compacted concrete cushion changing and filling method |
Non-Patent Citations (3)
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| 蒋国忠: "换填垫层法在地基处理中的应用及效果", 《丽水学院学报》 * |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104018485A (en) * | 2014-06-18 | 2014-09-03 | 东南大学 | Bed course replacing and filling and carbonization reinforcing method of soft soil foundation |
| CN105297700A (en) * | 2015-10-15 | 2016-02-03 | 中国建筑第八工程局有限公司 | Method for treating sludge or quicksand foundation |
| CN105297700B (en) * | 2015-10-15 | 2018-06-29 | 中国建筑第八工程局有限公司 | A kind of mud, drift sand ground processing method |
| CN106638544A (en) * | 2016-12-26 | 2017-05-10 | 中冶天工集团有限公司 | Anti-seepage and anti-cracking construction method for ultra-large reinforced concrete bio-oxidation pond in cold area |
| CN108894209A (en) * | 2018-06-26 | 2018-11-27 | 中国电力工程顾问集团华东电力设计院有限公司 | The processing method and application of liquefied silt ground |
| CN109868700A (en) * | 2019-01-23 | 2019-06-11 | 杜毅 | A kind of highway engineering construction soft groundsill reinforcing equipment and reinforcement means |
| CN112095381A (en) * | 2020-09-17 | 2020-12-18 | 中国十七冶集团有限公司 | Construction method for soft roadbed treatment |
| CN112095381B (en) * | 2020-09-17 | 2021-11-02 | 中国十七冶集团有限公司 | Construction method for soft roadbed treatment |
| CN113417273A (en) * | 2021-06-29 | 2021-09-21 | 中铁十八局集团第一工程有限公司 | Silt stratum underground pipe gallery foundation sand replacement and filling reinforcement method |
| CN113356176A (en) * | 2021-07-15 | 2021-09-07 | 重庆尚源建筑景观设计有限公司 | Soft foundation treatment method |
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Application publication date: 20131211 |