CN1743561A - Column-hammer forced tamping substitution method - Google Patents
Column-hammer forced tamping substitution method Download PDFInfo
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- CN1743561A CN1743561A CN 200510030322 CN200510030322A CN1743561A CN 1743561 A CN1743561 A CN 1743561A CN 200510030322 CN200510030322 CN 200510030322 CN 200510030322 A CN200510030322 A CN 200510030322A CN 1743561 A CN1743561 A CN 1743561A
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Abstract
This invention discloses a new post hammer ramming replacement method, which first of all levels the ground, then sets out and distributes the places to decide the ram points, then a new post hammer, an ordinary ram hammer and a flat hammer are used to operate in steps. The effect of the new post hammer ramming replacement method is: every ram point forms a replacement pillar to be grouped to a thick earth block or an earth and stone mixed valve plate. In the stress sphere of the base, the replaced pillar and the compacted earth between pillars bear the top loaded compound ground base, which can be used in large stone filling, high saturated sand, clays with less than 40% water, thick plain fill, thin silt, ordinary cohesive soil or construction waste bone materials.
Description
Technical field
The present invention relates to the building lot reinforcing and processing method, especially relate to a kind of novel column-hammer forced tamping substitution method that is used for deep backfill or deep soft soil horizon ground stabilization.
Background technology
In construction work, generally want earlier ground to be reinforced, to improve intensity, bearing capacity and the stability of foundation soil, just can carry out next step construction.Dynamic compaction foundation treatment technology commonly used, be to adopt weight to tamp natural ground soil layer or soft soil horizon repeatedly, when soft soil horizon is thicker, tradition dynamic compaction and the effect of dynamic replacement rule are little, treatment effect is not obvious, particularly reinforcement depth does not reach designing requirement, the compactness and the intensity of deep soil are low, bearing capacity is poor, bigger compressive strain appears in foundation soil easily when bearing upper pressure, cause fabric structure to produce crack and differential settlement, simultaneously, if there is mud in ground than the depths, the earthquake liquefaction phenomenon can appear in the dynamic compaction construction, domestic present strong rammer equipment great majority (are 10T for the common crawler crane of being furnished with the auxiliary frame door, 15T, 20T, the middle-size and small-size crane of 30T), handling deep layer soft soil horizon poor effect, can't carry out the consolidation process of deep foundation soil, and large-scale rammer machine (more than the 50T) not only costs an arm and a leg, and construction One-Shift Costs height, Foundation Treatment is uneconomical, and large-scale rammer machine is from great, and place soft soil horizon intensity is low, make large-scale rammer machine be difficult to walking, can't construct.
Summary of the invention
The object of the present invention is to provide a kind of novel column-hammer forced tamping substitution method that is used for deep backfill or deep soft soil horizon ground stabilization, silt matter that this dynamic compaction can be used for handling that boulder bankets, high saturated sand, the clay of water content≤40%, plain fill, thickness that thickness is bigger are little or mucky soil, the soft grounds such as plastic general cohesive soil, architectural waste aggregate earth fill of moulding more can be used for all types of industries of multilayer even little high level and the foundation engineering of civilian construction and control is had relatively high expectations to settlement difference various buildings, water conservancy and highway facilities etc.
The object of the present invention is achieved like this:
(1), levelling of the land: by design elevation, dig, fill out and the earthwork of smooth place;
(2), unwrapping wire is layouted: by designing requirement, the location unwrapping wire is doubly layouted by the 1.5-2.0 that hammers end diameter into shape in the substrate field of load, determines tamping point; Between substrate, ground reinforces and expands in the rammer scope cloth and press formation condition and Structural Design Requirement control, and the 3--4 that is generally diameter at the bottom of the post doubly;
(3) gradation construction:
A, the first time are carried out the deep layer ground extruding: adopt novel post hammer, continuous injection of all tamping points or skips gradation injection (determining) according to soil body performance, hammer end static pressure value is about 80-150kPa, tamping pit is controlled in 5 meters, in the tamping pit after strong rammer is compacted, backfill original soil or aggregate continue to ram ceasing driving standard and the smooth place of determining to examination rammer district;
B, the second time are carried out the middle level ground extruding: adopt common hammer ram, continuous injection of all tamping points or gradation injection, principle according to protuberance amount≤20cm is selected, hammer end static pressure value is about 35-40kPa, tamping pit is controlled in 2.0 meters, in the tamping pit after strong rammer is compacted, and backfill aggregate or original soil, continue to ram the ceasing driving standard of determining to examination rammer district, and smooth place;
C, carry out the shallow-layer ground extruding for the third time: adopting common hammer ram is enlarging hammer, and hammer end static pressure value is hit full rammer for continuous 2-4 for the first time about 20-30kPa, is for the second time 1 to hit, and hammering overlaps 1/2-1/3;
D, each tamping point form the displacement pier of a first font after construction is finished.
Novel column-hammer forced tamping substitution method effect of the present invention is: each tamping point forms the displacement pier of a first font after construction is finished, forms the bigger soil body of a thickness or aggregate (sand, gravel or rubble, the useless aggregate of building etc.) mixes valve plate by each displacement pier combination back, in the substrate field of load by replacing pier body and pier subsoil body and being born a kind of composite foundation of superstructure load by the soil body between the pier after compacted jointly.
Because common dynamic compaction and dynamic replacement method are difficult to handle deep backfill or deep soft soil horizon ground stabilization, and novel column-hammer forced tamping substitution method Foundation Treatment technology of the present invention is to innovate to improve a kind of novel foundation treatment construction method that forms on the basis of common dynamic compaction and dynamic replacement method.The present invention is according to different engineering soil conditions, select different tamping energies for use, give full play to the potentiality of " novel post hammer ", merged the consolidation process principle of multiple foundation treatment technology, ram pore-forming to planning to build building lot, adopt tearing the useless aggregate backfill tamping pit of room building open and ramming of the useless aggregate of industry, local cheap native stone compound or urban waste, adopt enlarging hammer to carry out general rammer at last, up to reaching the purpose of deep soil and shallow soil being carried out simultaneously consolidation process.Employing the present invention not only can solve the technical barrier (as soil mass property, intensity and Deformation control etc.) in the dynamic compaction construction, and has saved construction costs greatly.After novel column-hammer forced tamping substitution method ground of the present invention is handled, effective reinforcement depth can be improved 1-2 doubly, bearing capacity can improve 40-150%, replacement the end degree of depth can reach 5-10m, reinforcing groundwork intensity and stability improves greatly, building settlement obviously reduces, and can reach the regulation requirement of design and standard.Silt matter that the present invention can be used for handling that boulder bankets, high saturated sand, the clay of water content≤40%, plain fill, thickness that thickness is bigger are little or mucky soil, the soft grounds such as plastic general cohesive soil, architectural waste aggregate earth fill of moulding.The present invention not only can be used for works limit and low layer industry and civilian construction, warehouse, oil tank, bunker, airport runways, railway and highway subgrade and the stone stockyard etc. of common dynamic compaction and the processing of dynamic replacement method, can also be used for all types of industries of multilayer even little high level and the foundation engineering of civilian construction and control is had relatively high expectations to settlement difference various buildings, water conservancy and highway facilities etc.
Description of drawings
Fig. 1 is the structural representation of novel post hammer;
Fig. 2 is the vertical view of Fig. 1.
The specific embodiment
Below in conjunction with embodiment and contrast accompanying drawing the present invention is described in further detail.
The construction sequence of novel column-hammer forced tamping substitution method is:
(1), levelling of the land: by design elevation, dig, fill out and the earthwork of smooth place;
(2), unwrapping wire is layouted: by designing requirement, the location unwrapping wire is doubly layouted by the 1.5-2.0 that hammers end diameter into shape in the substrate field of load, determines tamping point; Between substrate, ground reinforces and expands in the rammer scope cloth and press formation condition and Structural Design Requirement control, and the 3--4 that is generally diameter at the bottom of the post doubly;
(3) gradation construction:
A, the first time are carried out the deep layer ground extruding: adopt novel post hammer, continuous injection of all tamping points or skips gradation injection (determining) according to soil body performance, hammer end static pressure value is about 80-150kPa, tamping pit is controlled in 5 meters, in the tamping pit after strong rammer is compacted, backfill original soil or aggregate continue to ram ceasing driving standard and the smooth place of determining to examination rammer district;
B, the second time are carried out the middle level ground extruding: adopt common hammer ram, continuous injection of all tamping points or gradation injection, principle according to protuberance amount≤20cm is selected, hammer end static pressure value is about 35-40kPa, tamping pit is controlled in 2.0 meters, in the tamping pit after strong rammer is compacted, and backfill aggregate or original soil, continue to ram the ceasing driving standard of determining to examination rammer district, and smooth place;
C, carry out the shallow-layer ground extruding for the third time: adopting common hammer ram is enlarging hammer, and hammer end static pressure value is hit full rammer for continuous 2-4 for the first time about 20-30kPa, is for the second time 1 to hit, and hammering overlaps 1/2-1/3.
Claims (1)
1, a kind of novel column-hammer forced tamping substitution method is characterized in that:
(1), levelling of the land: by design elevation, dig, fill out and the earthwork of smooth place;
(2), unwrapping wire is layouted: by designing requirement, the location unwrapping wire is doubly layouted by the 1.5-2.0 that hammers end diameter into shape in the substrate field of load, determines tamping point; Between substrate, ground reinforces and expands in the rammer scope cloth and press formation condition and Structural Design Requirement control, and the 3-4 that is generally diameter at the bottom of the post doubly;
(3) gradation construction:
A, the first time are carried out the deep layer ground extruding: adopt novel post hammer, and continuous injection of all tamping points or skips gradation injection, the protuberance amount≤15cm after beating is rammed in control, hammer end static pressure value is about 120kPa, and tamping pit is controlled in 3 meters, in the tamping pit after strong rammer is compacted, the backfill aggregate continues to ram;
B, the second time are carried out the middle level ground extruding: adopt novel post hammer in conjunction with common hammer ram, continuous injection of all tamping points or gradation injection, protuberance amount≤15cm, hammer end static pressure value is about 120kPa, tamping pit is controlled in the 1.0-2.0 rice, in the tamping pit after strong rammer is compacted, and the backfill aggregate, continue to ram, and smooth place;
C, carry out the shallow-layer ground extruding for the third time: adopting common strong hammer ram is enlarging hammer, and hammer end static pressure value be continuous 2 times about 25kPa for the first time, and hammering is continuous, is for the second time 1 to hit, and hammering overlaps 1/3.
D, each tamping point form the displacement pier of a first font after construction is finished.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510030322 CN1743561A (en) | 2005-09-30 | 2005-09-30 | Column-hammer forced tamping substitution method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510030322 CN1743561A (en) | 2005-09-30 | 2005-09-30 | Column-hammer forced tamping substitution method |
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| CN1743561A true CN1743561A (en) | 2006-03-08 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102251514A (en) * | 2011-06-15 | 2011-11-23 | 谢开生 | Multi-section type variable cross-section dynamic compaction method |
| CN102535291A (en) * | 2012-02-02 | 2012-07-04 | 石家庄铁道大学 | Soft-soil foundation treatment method for expressway engineering |
| CN102535429A (en) * | 2012-01-20 | 2012-07-04 | 刘献刚 | Combined-rammer construction technology for foundation treatment |
| CN104594330A (en) * | 2015-01-16 | 2015-05-06 | 刘献刚 | Method for treating high-strength replacement pier composite ground foundation and high-strength replacement pier |
| CN106087946A (en) * | 2016-06-13 | 2016-11-09 | 贵州正业工程技术投资有限公司 | A kind of carbonate rock boulder strong rammer is combined to change to fill changes foundation reinforcement method |
| CN108914912A (en) * | 2018-07-16 | 2018-11-30 | 中国能源建设集团安徽省电力设计院有限公司 | A kind of Foundation Treatment engineering method of column-hammer forced tamping displacement |
| CN109914382A (en) * | 2019-03-12 | 2019-06-21 | 北京综建科技有限公司 | A kind of method of bulk rubble foundation strong rammer ground extruding |
| CN111733789A (en) * | 2020-03-24 | 2020-10-02 | 山西机械化建设集团有限公司 | Deep replacement process for fluid-plastic-soft-plastic clay by adopting medium-low energy level dynamic compaction |
-
2005
- 2005-09-30 CN CN 200510030322 patent/CN1743561A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102251514A (en) * | 2011-06-15 | 2011-11-23 | 谢开生 | Multi-section type variable cross-section dynamic compaction method |
| CN102535429A (en) * | 2012-01-20 | 2012-07-04 | 刘献刚 | Combined-rammer construction technology for foundation treatment |
| CN102535291A (en) * | 2012-02-02 | 2012-07-04 | 石家庄铁道大学 | Soft-soil foundation treatment method for expressway engineering |
| CN104594330A (en) * | 2015-01-16 | 2015-05-06 | 刘献刚 | Method for treating high-strength replacement pier composite ground foundation and high-strength replacement pier |
| CN106087946A (en) * | 2016-06-13 | 2016-11-09 | 贵州正业工程技术投资有限公司 | A kind of carbonate rock boulder strong rammer is combined to change to fill changes foundation reinforcement method |
| CN108914912A (en) * | 2018-07-16 | 2018-11-30 | 中国能源建设集团安徽省电力设计院有限公司 | A kind of Foundation Treatment engineering method of column-hammer forced tamping displacement |
| CN109914382A (en) * | 2019-03-12 | 2019-06-21 | 北京综建科技有限公司 | A kind of method of bulk rubble foundation strong rammer ground extruding |
| CN111733789A (en) * | 2020-03-24 | 2020-10-02 | 山西机械化建设集团有限公司 | Deep replacement process for fluid-plastic-soft-plastic clay by adopting medium-low energy level dynamic compaction |
| CN111733789B (en) * | 2020-03-24 | 2022-03-29 | 山西机械化建设集团有限公司 | Deep replacement process for fluid-plastic-soft-plastic clay by adopting medium-low energy level dynamic compaction |
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