CN108797566A - Bored concrete pile retaining wall material and preparation method thereof and pouring pile hole construction technology in a kind of miscellaneous fill - Google Patents
Bored concrete pile retaining wall material and preparation method thereof and pouring pile hole construction technology in a kind of miscellaneous fill Download PDFInfo
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- CN108797566A CN108797566A CN201810634215.7A CN201810634215A CN108797566A CN 108797566 A CN108797566 A CN 108797566A CN 201810634215 A CN201810634215 A CN 201810634215A CN 108797566 A CN108797566 A CN 108797566A
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- retaining wall
- wall material
- plastic clay
- miscellaneous fill
- bored concrete
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
Abstract
Bored concrete pile retaining wall material in a kind of miscellaneous fill of present invention offer, retaining wall material are made of the raw material of following parts by weight：88.98-93.98 parts of plastic clay, 5-10 parts of water, 1 part of soda ash, 0.02 part of caustic soda.There is high-ductility using plastic clay, high intensity, low compressibility and has many characteristics, such as good caking property, using plastic clay as the mixing material for stablizing hole wall in miscellaneous fill layer, it is fully combined with the loose material in the original soil body of hole wall and forms stress community, the hole wall inner surface of this method construction is smooth, it is irregular with the interface of original backfill soil body, hole filling is close, retaining wall stability is good, the high capacity of stake, construction method is environment friendly and pollution-free, improve construction efficiency, construction cost is saved, it is advanced by the duration, and packing material is cheap common, retaining wall is with obvious effects, it is simple and easy to operate.
Description
Technical field
The invention belongs to the realm of building construction, and in particular to bored concrete pile retaining wall material and preparation method thereof in a kind of miscellaneous fill
With pouring pile hole construction technology.
Background technology
Slurry coat method is to form mudcake and Reinforcing hole wall on hole wall when pouring pile hole is constructed and prevent from caving in, simultaneously
Stablize a kind of mud of water level in borehole.Water pressure is controlled using the pressure difference between mud and underground water in boring procedure,
Enable that mud forms mudcake on hole wall and Reinforcing hole wall prevents from caving in.
Rotary drilling rig is in deep back filled region, porosity is larger, without surface water layer region such as building waste, house refuse, block stone
Backfill etc. is more than the problem for using traditional handicraft pore-forming that would generally cause retaining wall difficulty in the miscellaneous fill layer of 20m depth, Yi Jicheng
Cementitious material is lost in seriously in concrete perfusion after stake, and it is ineffective to bring pouring material unrestrained to influence pile quality, retaining wall
Situations such as taking.
When bored concrete pile is constructed in the surrounding cities miscellaneous fill layer such as building waste, house refuse, because miscellaneous fill porosity is big,
Loose uneven, the easy unstability of the soil body, mud loss is serious, causes pore-forming difficult, and mud stabilization hole wall effect is poor, and retaining wall shape is not
Rule, concrete material waste is serious, and fullness coefficient is excessive, the problems such as easy ting produce collapse hole, necking down.
Since mud off technique is to use additive, bentonite, qualified mud is modulated by water to reach retaining wall effect
Fruit generates a large amount of discarded slurry in work progress, and slurry dewatering is difficult, needs by longer consolidation time；In addition to
Mud is modulated, introduces some poisonous and harmful elements sometimes, therefore the discharge of discarded slurry can be to environment such as soil and underground water
Cause high risks.
Mud off technique is in miscellaneous fill layer in application, mud can not intuitively check hole wall full of in entire stake holes
Effect, the mud modulation density needed is larger, and control is less than the range in 1.2~1.3g/cm3, then hole wall is unstable, is easy
There is the generation of the accidents such as collapse hole, burying, and mud is easy through hole parietal suture gap infiltration and is lost in, and causes around cost raising and stake
Soil bearing capacity declines.More than this range, then can rub in plug-in thick layer slurry liquid, the side for greatly reducing stake on hole wall
Resistance influences pile bearing capacity, increases the construction cost of stake, and mud density is excessive, can also cause the solid concentration in slurries
Increase, solid particle can slowly sink in mud, form thicker sediment before bored concrete pile, influence bearing capacity of pile tip.
Invention content
The purpose of the present invention is to solve the above-mentioned problems of the prior art, bored concrete pile in a kind of miscellaneous fill is provided and is protected
Wall material and preparation method thereof and pouring pile hole construction technology.
To achieve the above object, the present invention adopts the following technical scheme that：Bored concrete pile retaining wall material in a kind of miscellaneous fill, it is described
Retaining wall material is made of the raw material of following parts by weight：88.98-93.98 parts of plastic clay, 5-10 parts of water, 1 part of soda ash, caustic soda 0.02
Part.
The retaining wall material uses plastic clay, the plasticity index IP of the plastic clay to be more than 20.
The plastic clay is the sodium bentonite that smectite content is 65-85%, natural moisture content 10-15%.
The preparation method of bored concrete pile retaining wall material includes the following steps in miscellaneous fill：First plastic clay is sieved, size controlling
Within 2cm, water, soda ash, caustic soda are mixed in proportion, uniformly sprayed to the plastic clay sieved with spraying water pipe mixed
Then retaining wall material is uniformly mixed by aqueous solution.
A kind of pouring pile hole construction technology using bored concrete pile retaining wall material in above-mentioned miscellaneous fill includes the following steps：
（1）The preparation of retaining wall material；（2）Drilling machine is in place；（3）Transfer casing；（4）Drilling；（5）Backfill retaining wall material；（6）Drilling machine is reverse
Pressurization follow-up；（7）Drilling；（8）Pore-forming is checked and accepted.
Step（6）Middle inversely to be pressurizeed follow-up using multisection type rotary drilling rig, every section repeatedly extrudes 5-10min, by retaining wall
Material and hole wall loose ground are combined together, and form stable retaining wall hard shell.
The beneficial effects of the present invention are：The construction method that the present invention uses does not destroy original soil body, using plastic clay and hole
The original soil body of wall, which combines, forms common stress layer, and the hole wall inner surface of this method construction is smooth, the boundary with original backfill soil body
Face is irregular, and hole filling is close, and retaining wall stability is good, the high capacity of stake, and construction method is environment friendly and pollution-free, improves construction
Efficiency has saved construction cost, has been advanced by the duration, and packing material is cheap common, and retaining wall is with obvious effects, easy easily behaviour
Make.
Description of the drawings
Fig. 1 is the plastic clay retaining wall schematic cross-section of the present invention.
Specific implementation mode
Present invention will be further explained below with reference to the attached drawings and specific embodiments.
The method applied in the present invention is using plastic clay with high-ductility, high intensity, low compressibility and with good
The features such as caking property, using plastic clay as loose in the mixing material and the original soil body of hole wall for stablizing hole wall in miscellaneous fill layer
Material fully combines and forms stress community.The plasticity index IP of plastic clay should be greater than 20, remaining mechanics index of physics should meet height
Other requirements of plastic clay, the soil before marching into the arena should determine its optimum moisture content through overtesting, and measure its natural moisture content, and
Using preceding sieving, the impurity such as bulky grain are picked out, take measures stirring of uniformly spraying water, and plasticity soil material is made to be optimal water content,
Reach the optimum efficiency used, water content error is no more than 1%, which can be determined by soil test.
Embodiment 1
Retaining wall material is made of the raw material of following parts by weight：90 parts of plastic clay, 8.98 parts of water, 1 part of soda ash, 0.02 part of caustic soda.
Plastic clay is the sodium bentonite that smectite content is 65%, natural moisture content 15%.
The preparation of retaining wall material includes the following steps：First plastic clay is sieved, size controlling is within 2cm, by water, pure
Alkali, caustic soda mix in proportion, mixed aqueous solution are uniformly sprayed to the plastic clay sieved with spraying water pipe, then by retaining wall
Material is uniformly mixed.
Embodiment 2
Retaining wall material is made of the raw material of following parts by weight：91.5 parts of plastic clay, 7.48 parts of water, 1 part of soda ash, 0.02 part of caustic soda.
Plastic clay is the sodium bentonite that smectite content is 73%, natural moisture content 13%.
The preparation of retaining wall material includes the following steps：First plastic clay is sieved, size controlling is within 2cm, by water, pure
Alkali, caustic soda mix in proportion, mixed aqueous solution are uniformly sprayed to the plastic clay sieved with spraying water pipe, then by retaining wall
Material is uniformly mixed.
Embodiment 3
Retaining wall material is made of the raw material of following parts by weight：88.98 parts of plastic clay, 10 parts of water, 1 part of soda ash, 0.02 part of caustic soda.
Plastic clay is the sodium bentonite that smectite content is 85%, natural moisture content 10%.
The preparation of retaining wall material includes the following steps：First plastic clay is sieved, size controlling is within 2cm, by water, pure
Alkali, caustic soda mix in proportion, mixed aqueous solution are uniformly sprayed to the plastic clay sieved with spraying water pipe, then by retaining wall
Material is uniformly mixed.
Embodiment 4
Retaining wall material is made of the raw material of following parts by weight：93.98 parts of plastic clay, 5 parts of water, 1 part of soda ash, 0.02 part of caustic soda.
Plastic clay is the sodium bentonite that smectite content is 80%, natural moisture content 14%.
The preparation of retaining wall material includes the following steps：First plastic clay is sieved, size controlling is within 2cm, by water, pure
Alkali, caustic soda mix in proportion, mixed aqueous solution are uniformly sprayed to the plastic clay sieved with spraying water pipe, then by retaining wall
Material is uniformly mixed.
Pouring pile hole method in miscellaneous fill, includes the following steps：（1）The preparation of retaining wall material；（2）Drilling machine is in place；（3）
Transfer casing；（4）Drilling；（5）Backfill retaining wall material；（6）Drilling machine inversely pressurizes follow-up, is inversely added using multisection type rotary drilling rig
Pressure follow-up, every section repeatedly extrudes 5-10min, and retaining wall material and hole wall loose ground are fully combined together, and is formed stable
Retaining wall hard shell；（7）Drilling；（8）Pore-forming is checked and accepted.Ensure that stake end enters bearing stratum depth and is more than code requirement when construction, and meets and set
Slenderness ratio and upper load requirement are counted, should carry out test pile before Construction of Engineering Pile determines various parameters.
Fig. 1 show plastic clay retaining wall schematic cross-section, as can be seen from the figure 1 inner surface of stake holes wall of this method construction
Smooth, plastic clay is combined together to form stable retaining wall hard shell with hole wall loose ground, and retaining wall hard shell equivalent thickness is about 2cm,
Irregular with the interface of original backfill soil body 2, hole filling is close, there is stronger stability.Without suspensions such as mud in stake holes
Object can observe hole wall situation and bottom hole cleaning effect visual and clearly.
Due to there is no to be hung on hole wall outside mud, the side friction that mudcake reduces foundation pile, opposite retaining wall hard shell not will produce
Presence and in pore forming process pressurization follow-up, enhance the frictional force of hole wall surrounding soil, more effectively improve stake
Side friction, improve the bearing capacity of stake.Due to being that dry operation pore-forming bottom hole sediment is controllable, the end resistance of stake is also not affected by shadow
It rings.
Due to not needing mud off, pore forming process withouts waiting for the filling of mud, therefore pore-forming efficiency is faster；It does into
Hole operation pore-forming and concrete perfusion two procedures are independent of one another, do not interfere with each other, and are waited without the concern for mud veclamation and supplement
Journey greatly improves speed of application and construction efficiency.
It can directly be constructed in miscellaneous fill layer using plasticity soil stabilization hole wall, save construction cost and in advance duration, and fill
Material price is cheap common, and retaining wall is with obvious effects, simple and easy to operate；The filling of pile holes protecting wall layer surface is closely knit, to a certain extent
It ensure that the controllable of concrete perfusion material, reduce the waste of pile body concrete material, avoid fullness coefficient excessive；Pass through reality
It tests and determines water consumption needed for adjustment optimum moisture content, save a large amount of construction water compared with mud off, reduce construction cost.
For more traditional engineering method mud off technique, plasticity soil stabilization hole wall effect is more preferable and without mud emission, to environment
Substantially pollution-free, green construction not will produce mud the like waste；Plastic clay is filled with the gap of miscellaneous fill, it is suppressed that fills stake
The outflow of cement grout in concrete, prevents from impacting ambient enviroment.
Case history：Certain substation project pile body full section is backfill, miscellaneous fill, backfill building waste, crushed stone etc., work
Journey design requirement vertical ultimate bearing capacity of single pile characteristic value is 1756KN.Construction technology be respectively adopted dry pore-forming directly drill,
Holing with slurry wall protection bored concrete pile and plastic clay retaining wall, delivery receiving acceptance result are as follows：（1）Dry pore-forming directly drills：Due to lower part soil
Layer is uneven, and loose crushed stone collapse hole fails pore-forming, and actual measurement characteristic load bearing capacity is 1375KN, is far below design requirement；（2）Mud
Starch retaining wall cast-in-situ bored pile：Mud modulated process is too long, and sediment is blocked up, and actual measurement characteristic load bearing capacity is 1650KN, does not meet and sets
Meter requires；（3）Plastic clay retaining wall：Hole wall is molded smooth no collapse hole, with obvious effects, and actual measurement characteristic load bearing capacity is 2500KN, far
Higher than design requirement.
The above is the preferred embodiment of the present invention, it is noted that for those skilled in the art, this hair
It is bright to be not restricted to the described embodiments, under the premise of not departing from general idea of the present invention, several variations can also be made and changed
Into these should also be considered as protection scope of the present invention.
Claims (6)
1. bored concrete pile retaining wall material in a kind of miscellaneous fill, it is characterised in that：The retaining wall material by following parts by weight raw material group
At：88.98-93.98 parts of plastic clay, 5-10 parts of water, 1 part of soda ash, 0.02 part of caustic soda.
2. bored concrete pile retaining wall material in miscellaneous fill as described in claim 1, it is characterised in that：The plasticity index of the plastic clay
IP is more than 20.
3. bored concrete pile retaining wall material in miscellaneous fill as claimed in claim 1 or 2, it is characterised in that：The plastic clay is to cover to take off
Stone content is the sodium bentonite of 65-85%, natural moisture content 10-15%.
4. the preparation method of bored concrete pile retaining wall material in a kind of miscellaneous fill as described in claim 1, it is characterised in that：Including with
Lower step：First plastic clay is sieved, size controlling mixes water, soda ash, caustic soda within 2cm in proportion, with spraying water pipe to
The plastic clay sieved uniformly sprays mixed aqueous solution, is then uniformly mixed retaining wall material.
5. the pouring pile hole construction technology of bored concrete pile retaining wall material in a kind of application miscellaneous fill as described in claim 1,
It is characterized in that：Include the following steps：（1）The preparation of retaining wall material；（2）Drilling machine is in place；（3）Transfer casing；（4）Drilling；（5）It returns
Fill out retaining wall material；（6）Drilling machine inversely pressurizes follow-up；（7）Drilling；（8）Pore-forming is checked and accepted.
6. pouring pile hole construction technology as claimed in claim 5, it is characterised in that：Step（6）It is middle to use multisection type rotary digging
Drilling machine inversely pressurizes follow-up, and every section repeatedly extrudes 5-10min, and retaining wall material and hole wall loose ground are combined together, and is formed
Stable retaining wall hard shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810634215.7A CN108797566A (en) | 2018-06-20 | 2018-06-20 | Bored concrete pile retaining wall material and preparation method thereof and pouring pile hole construction technology in a kind of miscellaneous fill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810634215.7A CN108797566A (en) | 2018-06-20 | 2018-06-20 | Bored concrete pile retaining wall material and preparation method thereof and pouring pile hole construction technology in a kind of miscellaneous fill |
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| Publication Number | Publication Date |
|---|---|
| CN108797566A true CN108797566A (en) | 2018-11-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810634215.7A Pending CN108797566A (en) | 2018-06-20 | 2018-06-20 | Bored concrete pile retaining wall material and preparation method thereof and pouring pile hole construction technology in a kind of miscellaneous fill |
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Citations (5)
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|---|---|---|---|---|
| CN1309210A (en) * | 2001-03-28 | 2001-08-22 | 北京城建地铁地基市政工程有限公司 | Technology for constructing drilled and cast-in-situ pile with protective clay wall |
| CN104141311A (en) * | 2014-04-29 | 2014-11-12 | 中建四局第五建筑工程有限公司 | Mechanical holing method for protecting wall and structure formed with method |
| CN105386432A (en) * | 2015-12-08 | 2016-03-09 | 南京林业大学 | Cast-in-situ bored pile with wall protected through microorganism soil solidification and construction method |
| CN106192987A (en) * | 2016-08-01 | 2016-12-07 | 山西四建集团有限公司 | A kind of construction method that stake periphery is crushed geology reinforcing |
| CN106906709A (en) * | 2017-03-27 | 2017-06-30 | 石家庄铁道大学 | A kind of construction method of the modified cement earth pile of quick lime |
-
2018
- 2018-06-20 CN CN201810634215.7A patent/CN108797566A/en active Pending
Patent Citations (5)
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|---|---|---|---|---|
| CN1309210A (en) * | 2001-03-28 | 2001-08-22 | 北京城建地铁地基市政工程有限公司 | Technology for constructing drilled and cast-in-situ pile with protective clay wall |
| CN104141311A (en) * | 2014-04-29 | 2014-11-12 | 中建四局第五建筑工程有限公司 | Mechanical holing method for protecting wall and structure formed with method |
| CN105386432A (en) * | 2015-12-08 | 2016-03-09 | 南京林业大学 | Cast-in-situ bored pile with wall protected through microorganism soil solidification and construction method |
| CN106192987A (en) * | 2016-08-01 | 2016-12-07 | 山西四建集团有限公司 | A kind of construction method that stake periphery is crushed geology reinforcing |
| CN106906709A (en) * | 2017-03-27 | 2017-06-30 | 石家庄铁道大学 | A kind of construction method of the modified cement earth pile of quick lime |
Non-Patent Citations (5)
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| 张立波: "《高层建筑设计施工规范与新技术应用实务全书》", 30 September 2000, 海洋出版社 * |
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Application publication date: 20181113 |