CN104988938A - South China sea coastal area coral reef debris layer waterproof curtain body construction processing method - Google Patents
South China sea coastal area coral reef debris layer waterproof curtain body construction processing method Download PDFInfo
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Abstract
The invention relates to a south China sea coastal area coral reef debris layer waterproof curtain body construction processing method, and belongs to the technical field of geotechnical design and construction, and is used for solving the problem that the coral reef debris layer is large in permeability coefficient, high in intensity and large in bedrock surface fluctuation, and therefore a three-axis stirring pile is jammed. The processing method comprises that 1. three main factors which influence the stirring performance of the three-axis stirring pile used for the coral reef debris layer are prospected and recorded; 2. the jamming probability of the three-axis stirring pile is simulated and analyzed, a risk assessment model of the stirring feasibility of the coral reef debris layer of a proposed place is established; 3. the construction risk grade of the proposed place is determined according to the prospecting data and the risk assessment model; and 4. corresponding treatment measures are determined according to the construction risk grade; if the construction risk grade is the first grade, treatment measures are not needed; if the construction risk grade is the second grade, an improved three-axis stirring pile is employed; if the construction risk grade is the third grade or the fourth grade, the coral reef debris layer is pre-processed in a punching breaking manner; if the construction risk grade is the fifth grade, an avoiding or bypassing measure is taken.
Description
Technical field
The present invention relates to geotechnical engineering design and technical field of construction, particularly area is bordered on the sea containing coral reef crumb layer water-stop curtain body construction processing method in a kind of South Sea.
Background technology
The features such as the South Sea regional coral sand that borders on the sea is distributed more widely, and it is large that it has, and intensity is high, permeability strong, bedrock surface rises and falls, greatly have impact on the design and construction of this area's base pit engineering water seepage prevention system.Due to features such as coral reef chip transmission coefficient are large, intensity is high, bedrock surface fluctuating is large, the difficulty of design and construction can be increased.The Impermeable underground wall curtain body of this type of base pit engineering, usually adopts the Vertical dimension combination form that top is three axes agitating pile, bottom is high-pressure rotary jet grouting pile., intensity high, bedrock surface rise and fall large coral reef crumb layer large for transmission coefficient, usually there will be three axes agitating pile bit freezing, embraces the rough sledding such as brill in work progress.After there is above-mentioned construction difficult problem, what present stage was the most frequently used is exactly the conventional treatment method carrying out again after adopting the upper overburden layer of excavation and coral reef crumb layer backfilling.And above-mentioned processing method is for better compared with the treatment effect of superficial part position; For deep foundation ditch, this can increase difficulty of construction to a great extent, causes the waste of abuse and manpower, extends the construction period, cause the unprecedented soaring of construction cost; For ultra-deep foundation pit, because three axes agitating pile pile body length is greater than 20 meters, and common digging machine cutting depth is generally less than 17 meters, adopts said method to be difficult to solve above-mentioned construction difficult problem.Therefore, a kind of South Sea how is provided to border on the sea area containing coral reef chip stratum water-stop curtain body construction processing method, to border on the sea in regional water-stop curtain body construction process large because coral reef crumb layer transmission coefficient is large, intensity is high, bedrock surface rises and falls for solving the South Sea and cause three axes agitating pile bit freezing, embrace the construction difficult problem bored, saving duration, cost-saving, reduction difficulty of construction, is the technical problem that those skilled in the art need solution badly.
Summary of the invention
A kind of South Sea is the object of the present invention is to provide to border on the sea area containing coral reef crumb layer water-stop curtain body construction processing method, border on the sea containing the construction difficult problem of coral reef crumb layer Impermeable underground wall curtain body to solve, particularly solve large because coral reef crumb layer transmission coefficient is large, intensity is high, bedrock surface rises and falls and cause three axes agitating pile bit freezing, armful brill.Mainly according to carrying out inspecting hole prospecting to construction project to be built place, set up DEM analysis anticipation, the place larger for difficulty of construction is anticipated, and the place for constructional difficulties then should suitably be evaded, thus saves duration, cost-saving.
For solving the problems of the technologies described above, technical scheme of the present invention is as follows:
Area is bordered on the sea containing coral reef crumb layer water-stop curtain body construction processing method in the South Sea, and described water-stop curtain body is three axes agitating pile, comprises the steps:
Step one, field investigation, verify the buried depth and bedrock surface fluctuations situation of planning to build coral reef chip in place, three kinds of principal elements of the three axes agitating pile agitatability energy of the described coral crumb layer of record impact;
Step 2, the data obtained according to described step one, three axes agitating pile bit freezing, armful probability bored described in sunykatuib analysis, and containing the agitatability of coral reef crumb layer, Risk Evaluation model is set up to described place of planning to build;
Step 3, Risk Evaluation model according to survey data integrating step two plan to build the construction risk grade in place described in determining;
Step 4, construction risk grade determination treatment measures according to described step 3 are planning to build place and can constructing without the need to process of one-level for described construction risk grade; The three axes agitating pile machine improved is adopted to construct for described construction risk grade for planning to build place described in secondary; Described construction risk grade is constructed for planning to build after place takes the mode of punching fragmentation to carry out pretreatment described in three grades and level Four; For described in Pyatyi, place is planned to build for described construction risk grade, carries out risk transfer, take to avoid or construct around the workaround beaten.
Further, described three principal elements in described step one comprise overburden layer thickness, the thickness of coral reef crumb layer and the intensity of coral reef chip.
Further, described step 2 comprises carries out Orthogonal Composite by described three kinds of principal elements, obtains multiple combination form; And utilize PFC3D discrete element software to carry out numerical simulation to described multiple combination form, described three axes agitating pile bit freezing, armful probability bored under obtaining various combination form; And the simulation value under described multiple combination form is carried out the Risk Evaluation model that linear regression obtains described three axes agitating pile bit freezing, armful brill under described three kinds of principal element effects.
Further, utilize linear regression to obtain described three axes agitating pile bit freezing, embrace the probability calculation formula bored and be: y=-55.911+9.211x
1+ 7.200x
2+ 0.825x
3, in formula, y is three axes agitating pile bit freezing, embraces the probability bored, 0≤y≤100; When y≤0, get y=0; When y>=100, get y=100; X1 is described Coral Reef Rock thickness, x2 is described Coral Reef Rock intensity and, x3 is described upper overburden layer thickness.
Further, described construction risk grade comprises Pyatyi altogether: wherein, and the risk probability of happening of one-level is 0 ~ 10%; The risk probability of happening of secondary is 10 ~ 20%; The risk probability of happening of three grades is 20 ~ 30%; The risk probability of happening of level Four is 30 ~ 50%; The risk probability of happening of Pyatyi is 50 ~ 100%.
Further, the three axes agitating pile machine improved described in described step 4 comprises three drilling rods be parallel to each other be arranged on unit head, the free end of every root drilling rod is provided with drill bit, every root drilling rod is axially arranged with some vane group along drilling rod, often organize vane group and comprise three blades being distributed in described drilling rod side face, except the upper and lower correspondence of blade of two adjacent vane group near drill bit is arranged, the blade of all the other adjacent blades groups is all crisscross arranged, the both sides of described blade and free end face arrange some to symmetrically arranged alloy-steel plate respectively, often pair of described alloy-steel plate has the tip, right angle of stretching out outside blade, tip, described right angle comprises hypotenuse and right-angle side, described hypotenuse is positioned at the outside of described right-angle side, described right-angle side parallels with the axis of described blade, the spacing of adjacent blades group is 0.7-1.0 rice.
Compared with prior art, the technique effect that the present invention is useful is as follows: area is bordered on the sea containing coral reef crumb layer water-stop curtain body construction processing method in the South Sea provided by the invention, first the engineering geology planning to build place is reconnoitred, calculate fast according to field investigation data and obtain three axes agitating pile bit freezing under this operating mode on-the-spot, embrace the probability bored; Then set up the bit freezing of three axes agitating pile, embrace the Risk Evaluating System bored; Then determine to plan to build field construction risk class in conjunction with Risk Evaluating System according to on-the-spot inspecting hole and prospecting data; Last according to construction risk grade Quick the need of on-the-spot specially treated, thus considerably reduce workload, reduce construction risk.Meanwhile, judge the construction risk grade under corresponding operating mode according to construction risk grade after, rational measure is actively taked to carry out pretreatment to excessive risk operating mode, with the loss of a large amount of human and material resources caused of avoiding blindly constructing and waste.When construction risk grade is secondary, have employed the three axes agitating pile machine of improvement, improve the performance parameter of three axes agitating pile, the frictional resistance that remarkable reduction three axes agitating pile runs in whipping process and end resistance, effectively reduce three axes agitating pile in work progress, to occur bit freezing, embrace the probability bored, drastically increase efficiency of construction, accelerate construction speed, shorten the duration, decrease construction cost.
Accompanying drawing explanation
Fig. 1 is that area is bordered on the sea containing the process chart of coral reef crumb layer water-stop curtain body construction processing method in one embodiment of the invention South Sea;
Fig. 2 is the structural representation of the blade-carrying drilling rod of three axes agitating pile machine in one embodiment of the invention;
Fig. 3 is the structural representation of three axes agitating pile machine Leaf in one embodiment of the invention.
In figure: 1-drilling rod, 2-blade, 3-alloy-steel plate, 4-drill bit.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, area of bordering on the sea, the South Sea that the present invention proposes is described in further detail containing coral reef crumb layer water-stop curtain body construction processing method.According to the following describes and claims, advantages and features of the invention will be clearer.It should be noted that, accompanying drawing all adopts the form that simplifies very much and all uses non-ratio accurately, only in order to object that is convenient, the aid illustration embodiment of the present invention lucidly.For sake of convenience, hereinafter described " on ", D score is consistent with the upper and lower direction of accompanying drawing, but this can not become the restriction of technical solution of the present invention.
The invention provides a kind of South Sea and border on the sea area containing coral reef crumb layer water-stop curtain body construction processing method, cause three axes agitating pile bit freezing, armful problem of boring for solving in water-stop curtain body construction process greatly because coral reef crumb layer transmission coefficient is large, intensity is high, bedrock surface rises and falls, thus reduce difficulty of construction.
Describe the South Sea of the present invention in detail below in conjunction with Fig. 1 to Fig. 3 and border on the sea area containing coral reef crumb layer water-stop curtain body construction processing method.
Embodiment one
For South Sea base pit engineering, by reconnoitring the geological condition planning to build place, then set up and plan to build the agitatability Risk Evaluating System of place containing coral reef crumb layer, and calculate construction risk grade, finally make corresponding risk treatment measures respectively for different construction risk grades.
As shown in Figure 1, area of bordering on the sea, containing coral reef chip stratum water-stop curtain body construction processing method, comprises the steps:
S001: field investigation, verifies the buried depth and bedrock surface fluctuations situation of planning to build coral reef chip in place, and record affects three kinds of principal elements of the three axes agitating pile agitatability energy of coral crumb layer;
S002: the data obtained according to step one, sunykatuib analysis three axes agitating pile bit freezing, armful probability bored, and set up Risk Evaluation model to planning to build the agitatability of place containing coral reef crumb layer;
S003: determine the construction risk grade planning to build place according to the Risk Evaluation model of survey data integrating step two;
S004: according to the construction risk grade determination treatment measures of step 3, for construction risk grade be one-level plan to build place without the need to process can construct; The place of planning to build being secondary for construction risk grade adopts the three axes agitating pile machine improved to construct; Construction risk grade is three grades construct with planning to build after place takes the mode of punching fragmentation to carry out pretreatment of level Four; For construction risk grade be Pyatyi plan to build place, carry out risk transfer, take to avoid or around the workaround construction of beating.
Specifically, area is bordered on the sea containing coral reef crumb layer water-stop curtain body construction processing method in the South Sea of the present embodiment, first the engineering geology planning to build place is reconnoitred, calculate fast according to field investigation data and obtain three axes agitating pile bit freezing under this operating mode on-the-spot, embrace the probability bored; Then set up the bit freezing of three axes agitating pile, embrace the Risk Evaluating System bored; Then determine to plan to build field construction risk class in conjunction with Risk Evaluating System according to on-the-spot inspecting hole and prospecting data; Last according to construction risk grade Quick the need of on-the-spot specially treated, thus considerably reduce workload, reduce construction risk.Certainly, judge the construction risk grade under corresponding operating mode according to construction risk grade after, need to take rational measure to carry out pretreatment to excessive risk operating mode, with the loss of a large amount of human and material resources caused of avoiding blindly constructing and waste.When construction risk grade is secondary, have employed the three axes agitating pile machine of improvement, improve the performance parameter of three axes agitating pile, the frictional resistance that remarkable reduction three axes agitating pile runs in whipping process and end resistance, effectively reduce three axes agitating pile in work progress, to occur bit freezing, embrace the probability bored, drastically increase efficiency of construction, accelerate construction speed, shorten the duration, decrease construction cost.
Especially, three principal elements in step one comprise the intensity of overburden layer thickness, coral reef crumb layer thickness and coral reef chip.Step 2 comprises to carry out multiple orthogonal systems and merges and utilize PFC by three kinds of factors
3Ddiscrete element software carries out numerical simulation to multiple Orthogonal Composite, obtains three axes agitating pile bit freezing under various working condition, embraces the probability bored; Then linear regression is utilized to obtain three axes agitating pile bit freezing, embrace the Risk Evaluation model bored.PFC
3Dthe basic object of discrete element software study is that particle contacts with intergranular, the motion between its energy direct modeling spheric granules and interactional physical problem; Can create the bulky grain of arbitrary shape by connecting two or more granule, the combination particle be formed by connecting can as independently granule research.The aggregates body obtained by bonding adjacent particle can be used as the solid with resilient property, and when intergranular bonding is destroyed gradually, namely this solid produces and break.It is accurate that this software has result of calculation, and simulation process is detailed, the visual advantage such as by force of post processing.Utilize PFC
3Dwell coral reef crumb layer can be separated into circular granular small one by one, three axes agitating pile be considered as body of wall and simulate.Whole simulation process can record the interaction of three axes agitating pile in whipping process and between Rock And Soil at any time, and analog result accurately can obtain three axes agitating pile and occur bit freezing, embraces the particular location bored.Meanwhile, utilize linear regression to obtain three axes agitating pile bit freezing, embrace the probability calculation formula bored and be: y=-55.911+9.211x
1+ 7.200x
2+ 0.825x
3, in formula, y is three axes agitating pile bit freezing, embraces the probability bored, 0≤y≤100; When y≤0, get y=0; When y>=100, get y=100; x
1for Coral Reef Rock thickness, x
2for described Coral Reef Rock intensity and, x
3for upper overburden layer thickness, wherein x
1, x
2, x
3do nondimensionalization process, without physical unit.
Specifically, PFC
3Din discrete element numerical simulation process, have recorded three axes agitating pile respectively and punch the vertical stress in the whole process of Coral Reef Rock suffered by three drilling rods and resist moment of torsion.The power resources moved down owing to providing three axes agitating pile are in the self gravitation of three axes agitating pile, therefore when the vertical resistance suffered by drilling rod is greater than three axes agitating pile deadweight, agitation pile cannot continue to creep into, then there is the situation of bit freezing, when rock-soil layer near drill bit provides opposing moment of torsion to be greater than the nominal torque of drill bit self, drill bit also will there will be the rough sledding of embracing and boring.Utilize PFC
3Devery 1000 the step-length records of discrete element software one group of data, each working state recording data are at least more than 40,000 groups, later stage carries out processing and obtains three axes agitating pile and bit freezing occurs under this operating mode, embraces the probability bored, then each operating mode comprehensive utilize linear regression to obtain three axes agitating pile bit freezing under above-mentioned multifactor condition, embrace the probability calculation formula bored.
Further, according to three axes agitating pile bit freezing, embrace the probability calculation formula of brill in conjunction with operating mode, the risk class of coral reef chip stratum three axes agitating pile agitatability is divided into Pyatyi: wherein, the risk probability of happening of one-level is 0 ~ 10%; The risk probability of happening of secondary is 10 ~ 20%; The risk probability of happening of three grades is 20 ~ 30%; The risk probability of happening of level Four is 30 ~ 50%; The risk probability of happening of Pyatyi is 50 ~ 100%.
Especially, before construction three axes agitating pile, adopt G-150 type rig to carry out inspecting hole, 1.5m below inspecting hole to bedrock surface to position, every secondary agitation pile place, record Coral Reef Rock depth of stratum, bedrock surface absolute altitude, to instruct three axes agitating pile mechanical execution.Inspecting hole object is as follows: identify whether or not Coral Reef Rock distribution and depth of stratum thereof, when without Coral Reef Rock distribution or when adopting construction risk evaluation rank to be one-level, can adopt normal triaxial mixing pile construction; When there being Coral Reef Rock to distribute, when field construction risk class is secondary, the three axle mixers preferentially selecting power larger are constructed, or improve three axes agitating pile targetedly and optimize; When construction plant grade be three, level Four time, the heavy caliber Churn drill rig in 1.2 meters, a footpath should be adopted first to carry out punching process, behind complete broken Coral Reef Rock rock stratum, backfill sand again and compacting, three axes agitating pile of then constructing; When construction plant is Pyatyi, suggestion considers that change design selection and construction technology even evade unfavorable place.Be secondary for risk class and above plan to build three axle mixers power should being selected larger in place, to occur three axes agitating pile bit freezing because being short of power to overcome, embrace the risk of boring.Three conventional axle mixer models have ZKD85-3, ZKD85A-3, ZKD85B-3 tri-kinds, and the power of three strengthens successively.Therefore three axle mixers of corresponding power should be selected according to the difference of place risk class.Should select ZKD85A-3 for secondary place, ZKD85B-3 model mixer is preferentially selected in the above place of secondary.Stir inconvenient operating mode for ZKD85B-3 model mixer, suggestion takes minimizing three axle blade of stirrer quantity to increase interlobate spacing, thus reduces the resistance in whipping process.
Composition graphs 2 and Fig. 3 describe the structure of the three axes agitating pile machine improved in the present embodiment in detail.The three axes agitating pile machine improved comprises three drilling rods be parallel to each other 1 be arranged on unit head (not shown), the free end of every root drilling rod 1 is provided with drill bit 4, namely one end away from unit head of drilling rod 1 is provided with drill bit 4, every root drilling rod 1 is axially arranged with some vane group along drilling rod 1, often organize vane group and comprise three blades 2 being distributed in drilling rod 1 side face, except blade about 2 correspondence of two adjacent vane group near drill bit is arranged, the blade 2 of all the other adjacent blades groups is all crisscross arranged, and the spacing d of adjacent vane group is set to 0.7-1.0 rice.In the three axes agitating pile machine of the improvement that the present embodiment provides, the spacing d of adjacent vane group is set to 0.7-1.0 rice, compare the spacing of existing adjacent blades group 0.4 meter, increase spacing and significantly can reduce frictional resistance that three axes agitating pile runs in whipping process and end resistance, effectively reduce three axes agitating pile in work progress, to occur bit freezing, embrace the probability bored, drastically increase efficiency of construction, accelerate construction speed, shorten the duration, decrease construction cost.
In addition, continue with reference to figure 3, the both sides of blade 2 and free end face arrange some to symmetrically arranged alloy-steel plate 3 respectively, every alloy steel plate 3 has the tip, right angle of stretching out outside blade 2, tip, right angle comprises hypotenuse and right-angle side, hypotenuse be positioned at right-angle side outside, right-angle side parallels with the axis of blade.By arranging alloy-steel plate 3 at blade 2, the integral rigidity of blade 2 can be increased, thus make blade 2 more easily stir Coral Reef Rock, to a certain degree can on reduce frictional resistance that three axes agitating pile runs in whipping process and end resistance, reduce three axes agitating pile and in work progress, occur bit freezing, embrace the probability bored.
Embodiment two
Reconnoitre according to job site, the South Sea real data obtained and carry out simulation judge.This foundation ditch Zhou Changyue 1200m, area is 65300m
2, wherein region, foundation ditch large portion adopts three axes agitating pile to carry out bracing of foundation pit.Calculating parameter table as shown in the table is obtained by on-the-spot actual prospecting:
| Risk class | One-level | Secondary | Three, level Four | Pyatyi |
| Length (m) | 214 | 759 | 63.3 | 0 |
| Account for percentage (%) | 17.8 | 63.3 | 18.9 | 0 |
From above-mentioned calculating parameter table, planned to build water-stop curtain body design and construction risk class in place by Risk Evaluation model elaborates, carried out corresponding treatment measures according to different risk class.For convenience of construction, the unified ZKD85B-3 type three axle mixer that adopts in scene, place of planning to build being I and II for risk class is directly constructed, for the operating mode of indivedual more difficult stirring, have employed and reduce mixing pile machine blade quantity and subtract closely spaced mode, solve three axes agitating pile bit freezing preferably, embrace a difficult problem of boring; For risk class be three, the place reply coral reef crumb layer of planning to build of level Four takes the mode of punching fragmentation to process in advance, and then adopt ZKD85B-3 type three axle mixer to construct, reduce the deep-layer stirring difficulty of coral reef crumb layer, improve efficiency of construction.Carry out site operation by above-mentioned processing method, can successfully complete whole work progress, avoid the situation occurring three axes agitating pile bit freezing, embrace brill.
In sum, area is bordered on the sea containing coral reef crumb layer water-stop curtain body construction processing method in the South Sea of the present invention, first reconnoitres the engineering geology planning to build place, calculates and obtains three axes agitating pile bit freezing, embraces the probability bored; Then set up the bit freezing of three axes agitating pile, embrace the Risk Evaluating System bored; Then determine to plan to build field construction risk class in conjunction with Risk Evaluating System according to on-the-spot inspecting hole and prospecting data; Last according to construction risk grade Quick the need of on-the-spot specially treated, and corresponding pretreatment solution is set according to different construction risk grades, thus the loss that largely avoid because of a large amount of human and material resources caused of blindly constructing and waste, decrease workload, reduce construction risk.When construction risk grade is secondary, have employed the three axes agitating pile machine of improvement, comparing existing adjacent blades group spacing is 0.4 meter, by the spacing of adjacent vane group is set to 0.7-1.0 rice, significantly can reduce frictional resistance that three axes agitating pile machine runs in whipping process and end resistance, improve the performance parameter of three axes agitating pile, significantly reduce frictional resistance and end resistance that three axes agitating pile runs in whipping process, reduce three axes agitating pile and occur bit freezing in work progress, embrace the probability bored, drastically increase efficiency of construction, accelerate construction speed, shorten the duration, decrease construction cost.
Foregoing description is only the description to present pre-ferred embodiments, any restriction not to the scope of the invention, and any change that the those of ordinary skill in field of the present invention does according to above-mentioned disclosure, modification, all belong to the protection domain of claims.
Claims (6)
1. area is bordered on the sea containing coral reef crumb layer water-stop curtain body construction processing method in the South Sea, and described water-stop curtain body is three axes agitating pile, it is characterized in that, comprises the steps:
Step one, field investigation, verify the buried depth and bedrock surface fluctuations situation of planning to build coral reef chip in place, three kinds of principal elements of the three axes agitating pile agitatability energy of the described coral crumb layer of record impact;
Step 2, the data obtained according to described step one, three axes agitating pile bit freezing, armful probability bored described in sunykatuib analysis, and containing the agitatability of coral reef crumb layer, Risk Evaluation model is set up to described place of planning to build;
Step 3, Risk Evaluation model according to survey data integrating step two plan to build the construction risk grade in place described in determining;
Step 4, construction risk grade determination treatment measures according to described step 3 are planning to build place and can constructing without the need to process of one-level for described construction risk grade; The three axes agitating pile machine improved is adopted to construct for described construction risk grade for planning to build place described in secondary; Described construction risk grade is constructed for planning to build after place takes the mode of punching fragmentation to carry out pretreatment described in three grades and level Four; For described in Pyatyi, place is planned to build for described construction risk grade, carries out risk transfer, take to avoid or construct around the workaround beaten.
2. area is bordered on the sea containing coral reef crumb layer water-stop curtain body construction processing method in the South Sea as claimed in claim 1, it is characterized in that, described three principal elements in described step one comprise overburden layer thickness, the thickness of coral reef crumb layer and the intensity of coral reef chip.
3. area is bordered on the sea containing coral reef crumb layer water-stop curtain body construction processing method in the South Sea as claimed in claim 2, and it is characterized in that, described step 2 comprises carries out Orthogonal Composite by described three kinds of principal elements, obtains multiple combination form; And utilize PFC
3Ddiscrete element software carries out numerical simulation to described multiple combination form, described three axes agitating pile bit freezing, armful probability bored under obtaining various combination form; And the simulation value under described multiple combination form is carried out the Risk Evaluation model that linear regression obtains described three axes agitating pile bit freezing, armful brill under described three kinds of principal element effects.
4. area is bordered on the sea containing coral reef crumb layer water-stop curtain body construction processing method in the South Sea as claimed in claim 3, it is characterized in that, utilizes linear regression to obtain described three axes agitating pile bit freezing, embraces the probability calculation formula bored to be: y=-55.911+9.211x
1+ 7.200x
2+ 0.825x
3, in formula, y is three axes agitating pile bit freezing, embraces the probability bored, 0≤y≤100; When y≤0, get y=0; When y>=100, get y=100; x
1for described Coral Reef Rock thickness, x
2for described Coral Reef Rock intensity and, x
3for described upper overburden layer thickness.
5. area is bordered on the sea containing coral reef crumb layer water-stop curtain body construction processing method in the South Sea as claimed in claim 4, and it is characterized in that, described construction risk grade comprises Pyatyi altogether: wherein, and the risk probability of happening of one-level is 0 ~ 10%; The risk probability of happening of secondary is 10 ~ 20%; The risk probability of happening of three grades is 20 ~ 30%; The risk probability of happening of level Four is 30 ~ 50%; The risk probability of happening of Pyatyi is 50 ~ 100%.
6. area is bordered on the sea containing coral reef crumb layer water-stop curtain body construction processing method in the South Sea as claimed in claim 5, it is characterized in that, the three axes agitating pile machine improved described in described step 4 comprises three drilling rods be parallel to each other be arranged on unit head, the free end of every root drilling rod is provided with drill bit, every root drilling rod is axially arranged with some vane group along drilling rod, often organize vane group and comprise three blades being distributed in described drilling rod side face, except the upper and lower correspondence of blade of two adjacent vane group near drill bit is arranged, the blade of all the other adjacent blades groups is all crisscross arranged, the both sides of described blade and free end face arrange some to symmetrically arranged alloy-steel plate respectively, often pair of described alloy-steel plate has the tip, right angle of stretching out outside blade, tip, described right angle comprises hypotenuse and right-angle side, described hypotenuse is positioned at the outside of described right-angle side, described right-angle side parallels with the axis of described blade, the spacing of adjacent blades group is 0.7-1.0 rice.
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| CN1718935A (en) * | 2005-07-14 | 2006-01-11 | 天津临港工业区建设开发有限责任公司 | Method of solidifying blow filling soft soil using saponificated slag soil and saponificated slag |
| CN101768961A (en) * | 2010-01-22 | 2010-07-07 | 中铁二十二局集团第六工程有限公司 | Construction method of section-steel triaxial soil-cement mixing pile |
| CN202202334U (en) * | 2011-07-29 | 2012-04-25 | 上海勘测设计研究院 | Seepage-proofing curtain arranged in engineering major structure |
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