CN100396854C - Column-hammer strong-tamper displacing base kit supporting construction method - Google Patents

Column-hammer strong-tamper displacing base kit supporting construction method Download PDF

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Publication number
CN100396854C
CN100396854C CNB2006100190497A CN200610019049A CN100396854C CN 100396854 C CN100396854 C CN 100396854C CN B2006100190497 A CNB2006100190497 A CN B2006100190497A CN 200610019049 A CN200610019049 A CN 200610019049A CN 100396854 C CN100396854 C CN 100396854C
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Prior art keywords
hammer
domatic
construction
soil
tamping
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CNB2006100190497A
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CN1851144A (en
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刘献刚
邵忠心
郑有明
曹积才
屈峰
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Jiangxi Jiye Technology Group Co., Ltd
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Jiangxi Jiye Science & Technology Co Ltd
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Abstract

The present invention discloses a novel strongly-tampered column-hammer replacement foundation pit support construction method which comprises the following steps: firstly, levelling a field, setting out and stationing site; then carrying out the first site tamping construction and the second site tamping construction respectively, namely carrying out deep layer and middle-shallow layer replacement compacting; after levelling original soil, setting out slopes and digging by layers according to the design requirements of a foundation pit, artificially levelling slope surfaces, and constructing a retaining wall structure; finally putting the hammer away. The present invention is a novel foundation pit support method which has the characteristics that the cost of support construction is greatly reduced; the degree of mechanization is high and the support construction period is shortened; the effect of foundation pit support is achieved by compacting and solidifying the foundation soil of the foundation pit; the watertight effect of curtain can take into effect simultaneously on an area with a high underground water level; the present invention has the effect of raw materials saving and can meet the requirement of environment protection and energy-saving. The present invention is especially suitable for relatively wide terrain without significant buildings on the periphery and the foundation soil is unconsolidated, such as backfill soil, mucky soil, etc.

Description

The column-hammer strong-tamper displacing base kit supporting construction method
Technical field
The present invention relates to the building lot reinforcing and processing method, especially relate to a kind of column-hammer strong-tamper displacing base kit supporting construction method.
Background technology
Handle in the design and construction of construction and building foundation pit, slope retaining at foundation dynamic consolidation, conventional pattern foundation pit supporting structure scheme (campshed, EFFECT OF CEMENT STABILIZED SOIL RETAINING WALL, diaphragm wall, soil nailing wall and the contrary arch wall etc. of doing), generally be the design and construction that carries out the outer dewatering of on-site earlier, and then carry out the design and construction of foundation ditch, slope retaining.When running into backfill sand that on-the-spot stratum is a thick-layer or soft soil horizon, particularly under the operating mode of the foundation ditch of the shallow and peripheral built construction thing that the shallow embedding basis arranged of groundwater level depth or slope retaining (individual areas even more than 10m), owing to the reduction of water level, will inevitably cause the safety problems such as differential settlement of peripheral building.Simultaneously, adopt conventional pattern foundation pit supporting structure scheme, often (, periphery shallow as groundwater level depth has and builds the shallow foundation building because the long or on-the-spot site condition restriction of supporting cost height, supporting construction phase, can't adopt the outer precipitation in hole) wait the restrictive function of one or more factors, be difficult to reach the Expected Results that meets design requirement and reduce construction costs.
Summary of the invention
The object of the present invention is to provide a kind of can solve under the shallow situation of groundwater level depth, needn't cheat outside precipitation and reach that pattern foundation pit supporting structure effect, cost reduce significantly, column-hammer strong-tamper displacing base kit supporting construction method that mechanization degree height, supporting construction phase greatly shift to an earlier date.
The object of the present invention is achieved like this:
(1), levelling of the land:, dig, fill out and the earthwork of smooth place by design elevation;
(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, cloth is pressed formation condition and Structural Design Requirement control in ground reinforcing and the expansion rammer scope, is generally 3--4 times of hammer end diameter;
(3), that construction first pass tamping point carries out deep layer displacement is closely knit, the tamping point skips are arranged construction;
(4), original soil pushes away flat: utilize the existing assorted sand in place that tamping pit is filled and led up;
(5), that second time tamping point of construction carries out the middle-shallow layer displacement is closely knit, the tamping point skips are arranged construction;
(6), original soil pushes away flat: utilize the existing assorted sand in place that tamping pit is filled and led up;
(7), foundation ditch puts slope excavation according to the designing requirement layering, and is domatic manually smooth, constructs wall-retaining structure;
(8), ceasing driving standard: the equal ramming volume≤50mm of last two hammer outs, protuberance amount≤15cm;
(9), the tamping point that ceasing driving standard is not reached requirement is mended and is rammed and push away flat.
In work progress, also must strengthen survey is faced in surrounding building or structure, the horizontal movement of prop, sedimentation, with guiding construction.
The present invention is an a kind of novel foundation pit support method of innovating formation on the basis of column-hammer forced tamping displacement Foundation Treatment technology, it is the backfill sand or the soft soil horizon of thick-layer for on-the-spot stratum, after the foundation ditch that groundwater level depth is shallow or the operating mode of slope retaining are constructed by novel column-hammer forced tamping displacement, its mechanical property of foundation pit walls soil layer and physical property are greatly improved, the sand of former loose shape or soft moulding, the clay compactness that stream is moulded shape improves, the inner body coefficient of stability of the soil body, the overturning or slip resistance analysis coefficient of stability, doing the slippage coefficient of stability improves, transmission coefficient reduces, thereby reaches the effect of pattern foundation pit supporting structure.
Under the present invention's operating mode that also groundwater level depth is shallow at the scene, need not to carry out again campshed, EFFECT OF CEMENT STABILIZED SOIL RETAINING WALL, diaphragm wall, anchor pole, contraryly make the effect that measure such as the outer precipitation of arch wall and hole promptly can reach reinforcing, sealing.
The present invention has following characteristics:
(1), the support engineering cost is compared with other supporting schemes significantly and is reduced;
(2), mechanization degree height, supporting construction phase shift to an earlier date greatly;
(3), reach the effect of pattern foundation pit supporting structure by consolidated compacting to foundation ditch foundation soil itself;
(4), for the higher place of groundwater table, can play the effect of curtain water stop simultaneously: after novel column-hammer forced tamping displacement, the foundation ditch periphery forms the retaining wall of dynamic replacement pier combination one by one, thereby form the complex barricade of a transmission coefficient very little (its transmission coefficient obtains very big reduction the former relatively foundation soil) along the foundation ditch sideline, the gutter and the domatic linked network sprayed mortar surface layer at itself and Po Ding and the end, slope, forming a high concrete shell and little uniting of internal penetration of surface strength ends, draining system, thereby play the effect of curtain water stop, need not cheat outer precipitation design more separately, construction;
(5), by utilizing the effect of the same court soil body itself, can play the effect of saving raw material (as reinforcing bar, cement etc.), meet encircle, requirements of saving energy.
The present invention is specially adapted to that physical features is openr, the regional no underground utilities of periphery no important building, supporting pass through and foundation soil is places such as loose all kinds of backfill, mucky soil.
Description of drawings
Fig. 1 is the structural representation of novel column-hammer forced tamping displacement wall-retaining structure of the present invention;
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 strong-tamper displacing base kit supporting construction method is:
(1), levelling of the land:, dig, fill out and the earthwork of smooth place by design elevation;
(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), that construction first pass tamping point carries out deep layer displacement is closely knit, adopts novel post hammer tamping point skips to arrange construction;
(4), original soil pushes away flat: utilize the existing assorted sand in place that tamping pit is filled and led up;
(5), that second time tamping point of construction carries out the middle-shallow layer displacement is closely knit, adopt completely to go through hammer tamping point skips and arrange construction: ram branchs and carry out for two times, first pass continuous 2 hits, and hits for second time 1, rams seal and overlaps 1/3;
(6), original soil pushes away flat: utilize the existing assorted sand in place that tamping pit is filled and led up;
(7), foundation ditch puts slope excavation according to the designing requirement layering, and is domatic manually smooth, constructs wall-retaining structure;
(8), ceasing driving standard: the equal ramming volume≤50mm of last two hammer outs, protuberance amount≤15cm;
(9), the tamping point that ceasing driving standard is not reached requirement is mended and is rammed and push away flat.
In work progress, must strengthen survey is faced in surrounding building or structure, the horizontal movement of prop, sedimentation, with guiding construction.
Described wall-retaining structure comprises domatic pedestal 1, being fixed with vertical and horizontal at domatic 5 of domatic pedestal 1 all is equi-spaced apart and vertically inserts domatic 5 linked network muscle 6, be covered with the steel mesh reinforcement 7 that can hang on the linked network muscle 6 domatic 5, on domatic 5, be fixed with the layer of concrete 8 that covers linked network muscle 6 and steel mesh reinforcement 7; End face 2 at domatic pedestal 1 is provided with gutter 3, is provided with gutter 10 in the bottom surface 9 of domatic pedestal 1.
In domatic pedestal 1, be fixed with vertical and horizontal and all be equi-spaced apart and dynamic replacement pier 4 vertically downward, the diameter of dynamic replacement pier 4 is 0.8--1.8m, is filled with fillers 11 such as same court soil, backfill sandstone, building fragment or low strength concrete in dynamic replacement pier 4.
Spacing L1 between the dynamic replacement pier 4 is 0.5--3.0m, and the array pitch L2 between the dynamic replacement pier 4 is 0.5-3.0m, and row's number of dynamic replacement pier 4 is 1-5 row.

Claims (4)

1. column-hammer strong-tamper displacing base kit supporting construction method is characterized in that:
(1), levelling of the land:, dig, fill out and the earthwork of smooth place by design elevation;
(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, for the 3--4 of hammer end diameter doubly;
(3), that construction first pass tamping point carries out deep layer displacement is closely knit, adopts post hammer tamping point skips to arrange construction;
(4), original soil pushes away flat: utilize the existing assorted sand in place that tamping pit is filled and led up;
(5), that second time tamping point of construction carries out the middle-shallow layer displacement is closely knit, adopt completely to go through hammer tamping point skips and arrange construction: ram branchs and carry out for two times, first pass continuous 2 hits, and hits for second time 1, rams seal and overlaps 1/3;
(6), original soil pushes away flat: utilize the existing assorted sand in place that tamping pit is filled and led up;
(7), foundation ditch puts slope excavation according to the designing requirement layering, and is domatic manually smooth, constructs wall-retaining structure;
(8), ceasing driving standard: the equal ramming volume≤50mm of last two hammer outs, protuberance amount≤15cm;
(9), the tamping point that ceasing driving standard is not reached requirement is mended and is rammed and push away flat.
2. column-hammer strong-tamper displacing base kit supporting construction method as claimed in claim 1, it is characterized in that: domatic (5) at the domatic pedestal (1) of described wall-retaining structure are fixed with the linked network muscle (6) that vertical and horizontal all are equi-spaced apart and vertically insert domatic (5), be covered with the steel mesh reinforcement (7) that hangs on the linked network muscle (6) in domatic (5), on domatic (5), be fixed with the layer of concrete (8) that covers linked network muscle (6) and steel mesh reinforcement (7); End face (2) in domatic pedestal (1) is provided with gutter (3), is provided with gutter (10) in the bottom surface (9) of domatic pedestal (1).
3. column-hammer strong-tamper displacing base kit supporting construction method as claimed in claim 2, it is characterized in that: in domatic pedestal (1), be fixed with vertical and horizontal and all be equi-spaced apart and dynamic replacement pier (4) vertically downward, the diameter of dynamic replacement pier (4) is 0.8--1.8m, is filled with the filler (11) that same court soil, backfill sandstone, building fragment or low strength concrete constitute in dynamic replacement pier (4).
4. as claim 2 or 3 described column-hammer strong-tamper displacing base kit supporting construction methods, it is characterized in that: the spacing (L1) between the dynamic replacement pier (4) is 0.5--3.0m, array pitch (L2) between the dynamic replacement pier (4) is 0.5-3.0m, and row's number of dynamic replacement pier (4) is 1-5 row.
CNB2006100190497A 2006-05-12 2006-05-12 Column-hammer strong-tamper displacing base kit supporting construction method Active CN100396854C (en)

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CN100396854C true CN100396854C (en) 2008-06-25

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Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102561362A (en) * 2011-12-31 2012-07-11 青建集团股份公司 Construction method for foundation pit supporting by dynamic compaction replacement of muddy soil
CN106320368A (en) * 2016-08-21 2017-01-11 中铁四局集团有限公司 Construction method applicable to open-excavation pipeline at compound stratum
CN106703043A (en) * 2017-01-10 2017-05-24 深圳市基础工程有限公司 Soft soil foundation pit construction method by using dynamic compaction block stone displacement instead of supporting

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1584221A (en) * 2004-06-16 2005-02-23 周健 Superficial soft soil foundation rapid dynamic solidifying technology

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1584221A (en) * 2004-06-16 2005-02-23 周健 Superficial soft soil foundation rapid dynamic solidifying technology

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Application publication date: 20061025

Assignee: Constant Construction Group Co., Ltd. special soft foundation branch

Assignor: Jiangxi Jiye Science & Technology Co., Ltd.

Contract record no.: 2014360000087

Denomination of invention: Column-hammer strong-tamper displacing base kit supporting construction method

Granted publication date: 20080625

License type: Exclusive License

Record date: 20140603

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Address after: 330200 Jiangxi city in Nanchang Province Economic Development Zone Shandong blue Fu Road No. 1211

Patentee after: Jiangxi Jiye Technology Group Co., Ltd

Address before: 330200 Jiangxi province Nanchang County Xiaolan Industrial Park Fu Shandong Road No. 1211

Patentee before: JIANGXI JIYE SCIENCE AND TECHNOLOGY Co.,Ltd.