CN101775814B - Anti-slip cement soil pile soil blocking structure and construction method thereof - Google Patents

Anti-slip cement soil pile soil blocking structure and construction method thereof Download PDF

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Publication number
CN101775814B
CN101775814B CN2009100463996A CN200910046399A CN101775814B CN 101775814 B CN101775814 B CN 101775814B CN 2009100463996 A CN2009100463996 A CN 2009100463996A CN 200910046399 A CN200910046399 A CN 200910046399A CN 101775814 B CN101775814 B CN 101775814B
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China
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soil
pile
cement
slip
antiskid
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CN2009100463996A
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Chinese (zh)
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CN101775814A (en
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刘全林
宋伟民
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上海强劲地基工程股份有限公司
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Abstract

The invention relates to the technology of reinforcing, supporting and protecting soft rock soil in the rock engineering. An anti-slip cement soil pile soil blocking structure is formed through the addition of a cement soil anti-slip pile body in the soft soil body and the combination. The anti-slip cement soil pile soil blocking structure overcomes various defects of the common soil blocking structure, and belongs to a novel structure with the advantages of safety, environment protection, economy and fast construction. The anti-slip cement soil pile soil blocking structure and a construction method thereof are characterized in that vertical cement soil piles, vertical hole drilling filled piles, steel plate piles, underground continuous walls and the like as well as cement soil anti-slip piles (with different lengths and inclination angle) tension, pull and lock the added rib bodies arranged in an anti-slip pile body through horizontal walings for being combined into the soil blocking structure, wherein tensioning bodies (such as steel stranded wires, steel pipes, cable wires, formed steel, non-metal materials and the like) are inserted inside the vertical cement soil piles, the vertical hole drilling filled piles, the steel plate piles, the underground continuous walls and the like. Through the pre-reinforcing on the soft soil body and the pre-tensioning pulling on the added rib bodies in the anti-slip pile by the soil block structure, the stability of the reinforced, supported and protected soil body is greatly improved, and the horizontal and vertical displacement amount is greatly reduced.

Description

A kind of anti-slip cement soil pile soil blocking structure and job practices thereof

One, technical field

The present invention relates in the geotechnical engineering weak rock-reinforcing and support technology, by in soft soil, adding cement-soil antiskid pile body, and, form a kind of retaining wall, will improve its reinforcing and support capacity greatly, reduce construction costs through combination.

Two, technical background

In the engineering construction in China area such as coastal, riverine, ubiquity foundation soil weakness, poor stability, the characteristics that bearing capacity is on the low side especially in the developed area, are used for ground and handle and the employed expense of bracing of foundation pit, and will have more than hundred billion yuan every year.At present, in China's ground processing and bracing of foundation pit engineering, the soil-baffling structure that adopts mainly contains diaphragm wall, bored pile, soil nailing wall, SMW worker's method and piled anchor structure, often there are many defectives in the construction technology of these structures and are subjected to the restriction of engineering geology and construction environment, is difficult to pore-forming when running into silt soil strata, powder soil horizon or flour sand layer as soil nailing or anchor pole, the deep-mixed pile processing degree of depth is limited.Deep-mixed pile body itself usually only uses as water-stop curtain, and can not singlely use as soil-baffling structure because intensity is lower.In order to reach the native purpose of retaining, need be in deep-mixed pile H shaped steel, in conjunction with interior support or anchor pole, form soil-baffling structure with diaphragm wall, bored pile, often like this cause big difficulty for design and construction, construction cost is significantly improved.

Use the difficulty of construction and the more high deficiency of cost of existence respectively in view of above-mentioned soil-baffling structure, through experimental study for many years, we have invented a kind of new soil-baffling structure---antiskid cement earth pile retaining wall, this retaining wall has not only overcome all deficiencies of soil-baffling structure at present commonly used, and is a kind of not only safety, environmental protection but also economical and the new structure fast of constructing.

Three, summary of the invention

A kind of anti-slip cement soil pile soil blocking structure is the vertical cement earth pile that utilizes interpolation strength body (as steel strand, steel pipe, reinforcing bar, wire rope, shaped steel, nonmetals etc.), vertical bored pile, the stake of SMW worker's method, steel sheet pile and diaphragm wall etc., with different length and inclination angle cement-soil antislide pile, by horizontal waling with the reinforcement body tensioning fixation in the cement-soil antiskid pile body, the soil-baffling structure that combines, its form of structure is shown in Fig. 1,2,3,4.

This soil-baffling structure fully passes through the pre-stretch-draw to reinforcement body in the pre-reinforcing of soft soil and the antislide pile, and the stability raising greatly, level and the vertical displacement amount that are reinforced with the supporting soil body are reduced greatly.

This retaining wall has following characteristics:

(1) skid resistance height: antiskid cement earth pile and vertical soil-baffling structure combination by on the diverse location of soft layer, applying different angle, different length, form the antiskid retaining wall as shown in Figure 1, 2, increased the skid resistance that is reinforced slight slope greatly;

(2) reduce oblique efficiency of pile groups: the antiskid cement earth pile stake on same level and same section is long to connect the different length design, as shown in Figure 1, 2, makes that the earth stress in the unit area reduces on same section, to reduce oblique efficiency of pile groups;

(3) effectively control slope displacement:, the initial displacement of side slope is eliminated when the stretch-draw by the muscle body in the oblique antiskid cement earth pile is applied pretension shown in Fig. 3,4;

(4) the combination antislide pile becomes overall structure: set up horizontal waling the oblique antiskid pile body on the same level is all locked thereon, shown in Fig. 2,3, combine with vertical retaining wall, make the oblique antiskid pile body of varying level all be combined into an overall structure by vertical retaining wall;

(5) construction costs is low: compare with conventional soil-baffling structure, construction costs reduces more than 30%;

(6) suitable stratum is extensive: this structure all has higher anti-slide performance at mud, silt clay, clay, silt, flour sand layer etc.;

(7) concrete pre-consolidation effect:, can to the pre-reinforcing on mud, mucky soil, sand stratum, will effectively improve the stability of ground as the enhancing body of composite foundation by apply oblique antiskid cement earth pile at soft layer;

(8) economic environmental protection: noise is little, pollution-free, economic environmental protection

Four, description of drawings

(body matter)

The sectional drawing of Fig. 1 anti-slip cement soil pile soil blocking structure

The horizontal development figure of Fig. 2 anti-slip cement soil pile soil blocking structure

The compound mode of oblique antiskid cement earth pile of Fig. 3 and vertical retaining wall knot

The connected mode of oblique antislide pile of Fig. 4 and horizontal waling

The put more energy into reinforcement body, 4-cement sand bed, 5-of body, 3-antislide pile of the vertical piling wall of 1-, 2-connects waling, A1, A2, A3, A4-antiskid pile body, 6-prestressing force lockset, the 7-anchor ingot plate of antislide pile, the backing plate of 8-prestressing force lockset.

Five, the specific embodiment

(1), at first use single shaft, two or three mixing pile machines, the soil body and cement grout mix are formed EFFECT OF CEMENT STABILIZED SOIL RETAINING WALL or water-stop curtain;

(2), vertical soil blocking pile body is composited to insert (or several) core (shaped steel, steel pipe, steel strand, prestressed concrete pipe pile, the stake of prestressed concrete pipe side, precast reinforced concrete structure etc.) by vibration or extruding then.Perhaps make bored pile, diaphragm wall, steel sheet pile etc. as vertical soil blocking pile body;

(3), the oblique antiskid cement earth pile construction technology of construction be mode by rotary jet stirring by design point of view, usage level jet drill rig, pass water-stop curtain, form a large diameter antiskid cement earth pile as shown in Figure 3;

(4), add muscle body material in the antiskid cement earth pile: adopt steel strand, wire rope or non-metal rope body, by the method for disposable dispensing or secondary dispensing, muscle body material and anchor ingot plate are joined together on the center of antiskid cement soil pile shown in Fig. 3 of institute, 4;

(5), set up the horizontal waling of meter: be combined into an integral body in order to make antiskid cement soil pile and vertical retaining wall, the waling of a level is set up in requirement, the waling material adopts shaped steel or Reinforced Concrete Materials to make, make all the antiskid cement soil piles on this horizontal level be combined into an integral body, as shown in Figure 1, 2 by this waling structure and vertical retaining wall;

(6), construction pretension: the muscle body material in the antagonism water skiing earth pile body adopts the mode of prestressed stretch-draw, eliminate the initial deformation of muscle body and check the quality of antiskid cement soil pile, be locked on the horizontal waling by about 80% of design stretching force, the equal tensioning fixation of each root antiskid cement earth pile that requires this level is on the waling of this level, shown in Fig. 2,3,4.Overlap.

Claims (9)

1. anti-slip cement soil pile soil blocking structure, it is characterized in that, utilize the vertical cement earth pile of interpolation strength body, vertical bored pile, the stake of SMW worker's method, steel sheet pile or diaphragm wall, antiskid cement earth pile with different length and inclination angle, by with the reinforcement body tensioning fixation in the antiskid cement soil pile on horizontal waling, the soil-baffling structure that combines.
2. soil-baffling structure according to claim 1 is characterized in that: the antiskid cement earth pile is churning, stirs pile body, and the interpolation reinforcement material is steel strand or wire rope, and the muscle body is positioned at an end place anchor ingot plate is housed.
3. soil-baffling structure according to claim 1 is characterized in that: the antiskid cement earth pile is different with length, inclination angle on the same section in same level.
4. soil-baffling structure according to claim 1 is characterized in that: horizontal waling adopts steel concrete or section steel manufacture, and reserves the hole of passing through of antislide pile muscle body.
5. the job practices of an anti-slip cement soil pile soil blocking structure, it is characterized in that, utilize the vertical cement earth pile of interpolation strength body, vertical bored pile, the stake of SMW worker's method, steel sheet pile or diaphragm wall, antiskid cement earth pile with different length and inclination angle, by with the reinforcement body tensioning fixation in the antiskid cement soil pile on horizontal waling, combine soil-baffling structure.
6. job practices according to claim 5 is characterized in that: the muscle body in the oblique antiskid cement earth pile all will apply pretension.
7. job practices according to claim 5 is characterized in that: the oblique antiskid cement soil pile on the same level is through all locking on the waling of this level after the stretch-draw.
8. job practices according to claim 5 is characterized in that: adding muscle body material in the antiskid cement earth pile is by the method for disposable dispensing or secondary dispensing, and muscle body material and anchor ingot plate are joined on the center of antiskid cement soil pile together.
9. job practices according to claim 5 is characterized in that, the muscle body material in the antagonism water skiing earth pile body applies prestressing force, eliminates the initial deformation of muscle body and checks the quality of antiskid cement soil pile through stretch-draw.
CN2009100463996A 2009-02-20 2009-02-20 Anti-slip cement soil pile soil blocking structure and construction method thereof CN101775814B (en)

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CN101775814B true CN101775814B (en) 2011-07-20

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CN102433882A (en) * 2010-09-29 2012-05-02 李宪奎 Construction method for forming foundation pit support through combining concrete pile wall and jet grouting anchor piles and anchor bar structural piece
CN102322067B (en) * 2011-06-27 2013-05-08 河海大学 Method for treating landslide projects through combining chemical electroosmosis method with micro anti-slide piles
CN102330427B (en) * 2011-07-23 2012-12-26 上海强劲地基工程股份有限公司 Stiffening pile with high uplift resistance
CN102425174A (en) * 2011-12-10 2012-04-25 中国建筑西南勘察设计研究院有限公司 Drainage tubular pile and soil nailing wall composite supporting structure
CN102561363A (en) * 2012-02-08 2012-07-11 上海强劲地基工程股份有限公司 Prestressed gravity type cement parapet wall and construction method thereof
CN103174151A (en) * 2013-03-16 2013-06-26 中铁二院工程集团有限责任公司 Retaining reinforced structure for excavation of foundation pit adjacent to existing construction
CN103290861B (en) * 2013-06-24 2015-09-23 天津住宅集团建设工程总承包有限公司 A kind ofly guarantee the reinforced continuous cement-soil wall pile extracting method that surrounding enviroment are stable
CN104153373B (en) * 2014-08-22 2017-01-18 中国建筑西南勘察设计研究院有限公司 Foundation pit supporting reinforcing device
CN105780778A (en) * 2014-12-22 2016-07-20 上海宝冶集团有限公司 Support method for old pipe inspection well in embedded excavation position of water inlet pipe of sewage pumping station
CN106400810A (en) * 2015-12-29 2017-02-15 上海建工五建集团有限公司 Foundation pit support structure and construction method thereof
CN105839648A (en) * 2016-04-15 2016-08-10 麦永光 Structure project for preventing landslide and debris flow hazards
CN106968265A (en) * 2017-04-28 2017-07-21 山东电力工程咨询院有限公司 A kind of combination foundation and method for bearing horizontal loading

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CN1851150A (en) * 2006-05-10 2006-10-25 大连理工大学 Concrete combined cushion wedge for supporting waist beam for pile anchoring system, and its constrection method

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