CN104790413A - Self-pressurization protecting device and method thereof for keeping expansive soil cut slope stable - Google Patents
Self-pressurization protecting device and method thereof for keeping expansive soil cut slope stable Download PDFInfo
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- CN104790413A CN104790413A CN201510192475.XA CN201510192475A CN104790413A CN 104790413 A CN104790413 A CN 104790413A CN 201510192475 A CN201510192475 A CN 201510192475A CN 104790413 A CN104790413 A CN 104790413A
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- plectane
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- pressurization
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/20—Securing of slopes or inclines
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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
- E02D5/74—Means for anchoring structural elements or bulkheads
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- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
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- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention discloses a self-pressurization protecting device and method thereof for keeping an expansive soil cut slope stable. The device comprises an anchor rod, a first circular plate, a second circular plate and a high-strength spring, the anchor rod is sleeved with the first circular plate and the second circular rod, the high-strength spring is arranged between the first circular plate and the second circular plate, a nut is arranged on the first circular plate, and the anchor rod is fixedly sleeved with the nut. By means of the self-pressurization device, the problem that the expansive soil cut slope tends to be unstable under the action of atmosphere is solved, the device is applicable to various types of expansive soil, meanwhile, the arrangement form is simple, the construction operation is simple and convenient, the device can be used for provisional protection as well, and the construction application prospect of the device is broad. The action mechanism of the protecting device conforms to the working rules of the expansive soil cut slope, and engineering characteristics of the expansive soil are taken into full consideration in the protection design; the construction efficiency is high, the arrangement is flexible, and the device is applicable to various soil layers; the device can be made of metal materials or bamboo or wood according to the protection time length, and the effect to the environment is little.
Description
Technical field
The present invention relates to the construction technology in field of civil engineering, be mainly used in In Slope Engineering Design and construction, particularly a kind ofly maintain the stable self-pressurization protector in expansive soil moat slope and method thereof.
Background technology
Along with socioeconomic development, the operation of a large amount of highway in swelled ground area, railway and hydraulic engineering or put into operation, and the process of construction of swelled ground area urbanization, create a large amount of expansive soil moat slopes.The forming process on expansive soil moat slope is the result of mankind's nature remodeling, and this usually can destroy the original stable state of natural material, for slope body catastrophe hides some dangers for.Under atmospheric effect, along with evaporation and rainfall cause the number of times of drying and watering cycle and amplitude to increase, expansive soil repeated expansion and shrinkage makes the soil body produce crisscross crack, the soil body becomes loose, intensity reduces, and adds weathering, destroys the integrality of the soil body further, make expansive soil moat slope be tending towards unstable, and then cause destroying.When expansive soil bears upper pressure, the soil body swell-shrinking deformation that drying and watering cycle causes can reduce greatly, and the dry density of the soil body and Crack change can be effectively suppressed, and the attenuation amplitude of soil strength reduces greatly.So adopt and maintain the stable self-pressurization protector in expansive soil moat slope and method thereof, can effectively maintain expansive soil intensity, ensure moat slope stability, and construction method is easy, efficiency is high, arrangement is flexible, can reduce engineering cost, expands range of application.
Summary of the invention
1. the technical problem that will solve
For problems of the prior art, the invention provides a kind of structure simple, be convenient to the stable self-pressurization protector in execute-in-place, construction costs maintenance expansive soil moat slope that is cheap, that meet expansive soil engineering properties and method thereof.
2. technical scheme
Object of the present invention is achieved through the following technical solutions.
A kind ofly maintain the stable self-pressurization protector in expansive soil moat slope, comprise anchor pole, the first plectane, the second plectane, high strong spring, the first described plectane and the second plectane are enclosed within anchor pole, high strong spring is provided with between the first described plectane and the second plectane, the first described plectane is provided with nut, and described nut fixed cover is on anchor pole.
The first described plectane diameter is less than the second plectane diameter.
Described anchor pole embedded depth is the 1.5-2 times of air dramatic impact degree of depth.
The first described plectane and the spacing of the second plectane are 0.2-0.5m.
Maintain the self-pressurization means of defence that expansive soil moat slope is stable, it is characterized in that step comprises:
Step 1) field sampling, carry out dilatancy test, soil sample dilatancy amount during by laboratory test determination soil sample being covered 0kPa, 12.5kPa, 25kPa, 50kPa and 100kPa, by interpolation method converse when dilatancy amount is zero on cover compressive stress δ;
Step 2) by above covering the coefficient of deformation k of compressive stress δ, the second plectane area A and high strong spring, converse deflection s=(δ the A)/k of spring;
Step 3) judge soil body air dramatic impact degree of depth d according to Technical code for buildings in swelling soil zone;
Step 4) according to air dramatic impact degree of depth d, consider soil body anchored force F=1.2 δ A, intensity parameter c, the φ of the test anchorage zone soil body, anchor pole coefficientoffrictionμ, converse according to specification the length l that anchor pole need be deep into below the air dramatic impact degree of depth;
Step 5) the length l of below the air dramatic impact degree of depth, air dramatic impact degree of depth d, spring deflection s and self-pressurization device length m need be deep into according to anchor pole, determine self-pressurization device anchor pole total length L=l+d+m-s;
Step 6) the self-pressurization device of various combination form is driven into by the mode of hammering, anchor pole embedded depth is D=l+d.
3. beneficial effect
Compared to prior art, the invention has the advantages that:
By the device of self-pressurization, solve the problem that expansive soil moat slope is tending towards unstable under atmospheric action, be applicable to various types of expansive soil, arrangement form is simple simultaneously, and constructing operation is easy, also can be used for provisional protection, and its future in engineering applications is wide.The mechanism of action of protector meets the working law on expansive soil moat slope, has taken into full account expansive soil engineering properties in protection Design; Efficiency of construction is high, flexible arrangement, is suitable for various soil layer; Material can select metal material, also can adopt the material such as bamboo or timber according to guard time length, little to ambient influnence.
Accompanying drawing explanation
Fig. 1 is single spring structure schematic diagram of the present invention.
Fig. 2 is Fig. 1 spring position schematic diagram.
Fig. 3 is the present invention's many groups spring schematic diagram.
Fig. 4 is Fig. 3 spring position schematic diagram.
Fig. 5 is scheme of installation of the present invention.
Fig. 6 is the domatic layout schematic diagram of the present invention.
Fig. 7 is packet type schematic diagram of the present invention.
In figure: 1, anchor pole 2, first plectane 3, second plectane 4, high strong spring 5, nut.
Detailed description of the invention
Below in conjunction with Figure of description and specific embodiment, the present invention is described in detail.
The invention belongs to expansive soil moat slope engineering protection new equipment and new method, for the catastrophe characteristic on expansive soil moat slope, design self-pressurization device, breathing under atmospheric action can be stoped to circulate the expansive soil strength retrogression caused, maintain expansive soil intensity, thus guarantee the stable of expansive soil moat slope, play the effect of moat slope protection.Change pressure and the influence basin of self-pressurization, adopt different materials, reliable expansive soil moat slope protection system can be formed, be applicable to the expansive soil moat slope of different swell-shrink characteristic.
The present invention is in conjunction with the evolutionary process of expansive soil moat slope catastrophe, adopt self-pressurization device, also can in conjunction with the material such as bamboo or wooden, utilize the pressure of self-pressurization, expansive soil breathing is stoped to circulate the strength retrogression caused, thus maintenance moat slope is stablized, for the Green Protection on moat slope, swelled ground area is for theoretical foundation and technical support, the special soils side slope protection that simultaneously also can be other area provides beneficial reference.The method can reduce the cost of moat slope preventive works, is applicable to various soil layer, and its future in engineering applications is wide.
Embodiment 1
As depicted in figs. 1 and 2, a kind ofly maintain the stable self-pressurization protector in expansive soil moat slope, comprise anchor pole 1, first plectane 2, second plectane 3, high strong spring 4, the first described plectane 2 and the second plectane 3 are enclosed within anchor pole 1, single high strong spring 4 is provided with between the first described plectane 2 and the second plectane 3, the first described plectane 2 is provided with nut 5, and described nut 5 fixed cover is on anchor pole 1.The first described plectane 2 diameter is less than the second plectane 3 diameter.The first described plectane 2 and the spacing of the second plectane 3 are 0.2-0.5m.
As shown in Figure 5, described anchor pole 1 embedded depth is the 1.5-2 times of air dramatic impact degree of depth.
Embodiment 2
As shown in Figure 3 and Figure 4, a kind ofly maintain the stable self-pressurization protector in expansive soil moat slope, comprise anchor pole 1, first plectane 2, second plectane 3, high strong spring 4, the first described plectane 2 and the second plectane 3 are enclosed within anchor pole 1, three high strong springs 4 are provided with between the first described plectane 2 and the second plectane 3, the first described plectane 2 is provided with nut 5, and described nut 5 fixed cover is on anchor pole 1.The first described plectane 2 diameter is less than the second plectane 3 diameter.The first described plectane 2 and the spacing of the second plectane 3 are 0.2-0.5m.
As shown in Figure 5, described anchor pole 1 embedded depth is the 1.5-2 times of air dramatic impact degree of depth.
Maintain the self-pressurization means of defence that expansive soil moat slope is stable, it is characterized in that step comprises:
Step 1) field sampling, carry out dilatancy test, soil sample dilatancy amount during by laboratory test determination soil sample being covered 0kPa, 12.5kPa, 25kPa, 50kPa and 100kPa, by interpolation method converse when dilatancy amount is zero on cover compressive stress δ;
Step 2) by above covering the coefficient of deformation k of compressive stress δ, the second plectane 3 area A and high strong spring 4, converse deflection s=(δ the A)/k of spring;
Step 3) judge soil body air dramatic impact degree of depth d according to Technical code for buildings in swelling soil zone;
Step 4) according to air dramatic impact degree of depth d, consider soil body anchored force F=1.2 δ A, intensity parameter c, the φ of the test anchorage zone soil body, anchor pole 1 coefficientoffrictionμ, converse according to specification the length l that anchor pole 1 need be deep into below the air dramatic impact degree of depth;
Step 5) length l, air dramatic impact degree of depth d, the high strong spring 4 deflection s and self-pressurization device length m of below the air dramatic impact degree of depth need be deep into according to anchor pole 1, determine self-pressurization device anchor pole 1 total length L=l+d+m-s;
Step 6) the self-pressurization device of various combination form is driven into by the mode of hammering, anchor pole 1 embedded depth is D=l+d, and domatic layout is as shown in Figure 6.
This device is by being driven in soil by anchor pole 1, high strong spring 4 between first plectane 2 and the second plectane 3 produces distortion, pressure is produced to the second plectane 3, pressure size is driven into the camber of spring size that the degree of depth causes determines by controlling anchor pole 1, pressure is delivered to expansive soil surface again by the second plectane 3, and applied pressure can the swell-shrinking deformation amount of confined expansion soil, maintains soil body dry density, reduce atmospheric action to the impact of expansive soil strength retrogression, thus it is stable to maintain expansive soil moat slope.Utilization is driven into method construction, and the pressure that spring-compressed is applied on the second plectane 3 can by anchor pole 1 amount of being driven into manual control; The protector of self-pressurization on moat slope can by the arranged in form of plum blossom.
When the soil body is tending towards broken, when crack is comparatively grown, by calculating, considering employing two self-pressurization devices or one group, three self-pressurization devices, as shown in Figure 7, constructing as above.
The air dramatic impact degree of depth:
Climate influenced layer is under natural climate effect, the effective depth causing the lifting of soil to be out of shape by factors such as rainfall, evaporation, ground temperature.The air dramatic impact degree of depth refers to the significant especially degree of depth of atmospheric effect, is the climate influenced layer of 0.45 times substantially.Specifically see Technical code for buildings in swelling soil zone.
Claims (5)
1. one kind maintains the stable self-pressurization protector in expansive soil moat slope, comprise anchor pole, the first plectane, the second plectane, high strong spring, it is characterized in that the first described plectane and the second plectane are enclosed within anchor pole, high strong spring is provided with between the first described plectane and the second plectane, the first described plectane is provided with nut, and described nut fixed cover is on anchor pole.
2. according to claim 1ly a kind ofly maintain the stable self-pressurization protector in expansive soil moat slope, it is characterized in that the first described plectane diameter is less than the second plectane diameter.
3. according to claim 1ly a kind ofly maintain the stable self-pressurization protector in expansive soil moat slope, it is characterized in that described anchor pole embedded depth is the 1.5-2 times of air dramatic impact degree of depth.
4. according to claim 1ly a kind ofly maintain the stable self-pressurization protector in expansive soil moat slope, it is characterized in that the spacing of the first described plectane and the second plectane is 0.2-0.5m.
5. maintain the self-pressurization means of defence that expansive soil moat slope is stable, it is characterized in that step comprises:
Step 1) field sampling, carry out dilatancy test, soil sample dilatancy amount during by laboratory test determination soil sample being covered 0kPa, 12.5kPa, 25kPa, 50kPa and 100kPa, by interpolation method converse when dilatancy amount is zero on cover compressive stress δ;
Step 2) by above covering the coefficient of deformation k of compressive stress δ, the second plectane area A and high strong spring, converse deflection s=(δ the A)/k of spring;
Step 3) judge soil body air dramatic impact degree of depth d according to Technical code for buildings in swelling soil zone;
Step 4) according to air dramatic impact degree of depth d, consider soil body anchored force F=1.2 δ A, intensity parameter c, the φ of the test anchorage zone soil body, anchor pole coefficientoffrictionμ, converse according to specification the length l that anchor pole need be deep into below the air dramatic impact degree of depth;
Step 5) the length l of below the air dramatic impact degree of depth, air dramatic impact degree of depth d, spring deflection s and self-pressurization device length m need be deep into according to anchor pole, determine self-pressurization device anchor pole total length L=l+d+m-s;
Step 6) the self-pressurization device of various combination form is driven into by the mode of hammering, anchor pole embedded depth is D=l+d.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510192475.XA CN104790413B (en) | 2015-04-21 | 2015-04-21 | A kind of maintain the stable self-pressurization preventer in swelled ground moat slope and method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510192475.XA CN104790413B (en) | 2015-04-21 | 2015-04-21 | A kind of maintain the stable self-pressurization preventer in swelled ground moat slope and method thereof |
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| CN104790413A true CN104790413A (en) | 2015-07-22 |
| CN104790413B CN104790413B (en) | 2016-08-17 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105804098A (en) * | 2016-03-31 | 2016-07-27 | 浙江大学宁波理工学院 | Pre-applied force anchoring system for slope protection device and construction method thereof |
| CN106087945A (en) * | 2016-06-07 | 2016-11-09 | 浙江大学 | Earth anchor and counter-force load precompressed soft foundation processing method |
| CN106087626B (en) * | 2016-06-07 | 2019-07-16 | 浙江大学 | Slim hole club-footed pile counter-force loads preloading method |
| CN111088805A (en) * | 2019-12-12 | 2020-05-01 | 武汉理工大学 | Integrated assembly type supporting device and supporting method thereof |
| CN111945752A (en) * | 2020-08-18 | 2020-11-17 | 中南大学 | Frame anchor supporting construction suitable for native slope self-adaptation warp control expands |
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| CN2188652Y (en) * | 1994-04-07 | 1995-02-01 | 柴永模 | Anchoring-bolt |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105804098A (en) * | 2016-03-31 | 2016-07-27 | 浙江大学宁波理工学院 | Pre-applied force anchoring system for slope protection device and construction method thereof |
| CN106087945A (en) * | 2016-06-07 | 2016-11-09 | 浙江大学 | Earth anchor and counter-force load precompressed soft foundation processing method |
| CN106087945B (en) * | 2016-06-07 | 2018-07-31 | 浙江大学 | Earth anchor and counter-force load precompressed soft foundation processing method |
| CN106087626B (en) * | 2016-06-07 | 2019-07-16 | 浙江大学 | Slim hole club-footed pile counter-force loads preloading method |
| CN111088805A (en) * | 2019-12-12 | 2020-05-01 | 武汉理工大学 | Integrated assembly type supporting device and supporting method thereof |
| CN111088805B (en) * | 2019-12-12 | 2021-03-16 | 武汉理工大学 | Integrated assembly type supporting device and supporting method thereof |
| CN111945752A (en) * | 2020-08-18 | 2020-11-17 | 中南大学 | Frame anchor supporting construction suitable for native slope self-adaptation warp control expands |
| CN111945752B (en) * | 2020-08-18 | 2021-04-20 | 中南大学 | Frame anchor supporting construction suitable for native slope self-adaptation warp control expands |
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| CN104790413B (en) | 2016-08-17 |
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Effective date of registration: 20181129 Address after: 213017 Room 938, Tianning Science Promotion Center, 256 Zhulin North Road, Tianning District, Changzhou City, Jiangsu Province Patentee after: Changzhou Dongji Road International Trade Co., Ltd. Address before: 213022 Wushan Road, Xinbei District, Changzhou, Jiangsu Province, No. 1 Patentee before: Changzhou Polytechnic College |