CN103835277A - Inflatable type multipoint displacement meter anchor head for soft soil stratums - Google Patents
Inflatable type multipoint displacement meter anchor head for soft soil stratums Download PDFInfo
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- CN103835277A CN103835277A CN201210480367.9A CN201210480367A CN103835277A CN 103835277 A CN103835277 A CN 103835277A CN 201210480367 A CN201210480367 A CN 201210480367A CN 103835277 A CN103835277 A CN 103835277A
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Abstract
The invention relates to an inflatable type multipoint displacement meter anchor head for soft soil stratums. The anchor head comprises a plurality of inflatable type anchoring heads, a hollow center pipe and high pressure inflatable pipes with the equal number as the number of the inflatable type anchoring heads, airbags are arranged in the inflatable anchoring heads, and triangular anchor claws are arranged outside the inflatable anchoring heads. The upper end and the lower end of each inflatable type anchoring head are provided with an upper connecting sleeve and a lower connecting sleeve respectively, the hollow center pipe sequentially penetrates through all the inflatable type anchoring heads and is connected with the upper connecting sleeves and the lower connecting sleeves on all the inflatable type anchoring heads respectively. One ends of the high pressure inflatable pipes are connected with a ground high pressure inflatable device, and the other ends of the high pressure inflatable pipes penetrate through the hollow center pipe and go deep into the airbags in all the inflatable type anchoring heads. Compared with the prior art, the inflatable type multipoint displacement meter anchor head for the soft soil stratums has the advantages of being large in measuring range, high in precision, capable of not being disturbed by construction in the measuring process, free of manual measuring errors, safe in construction, simple in mounting, convenient to measure, high in working efficiency and the like.
Description
Technical field
The present invention relates to a kind of multiple position extensometer anchor head, especially relate to a kind of air heave type multiple position extensometer anchor head for soft soil layer.
Background technology
The construction project of soft clay area, maximum feature is exactly that weak soil has the feature of " three high low ", there is high-moisture, high-compressibility, high thixotropic and low-intensity, therefore, the how accurately distortion of the soil body in monitoring works process of construction, be related to the safety of whole engineering, be also the most important thing in engineering simultaneously.
In engineering construction at present work progress, soft clay area land movement meter anchor head generally adopts the anchoring of claw hook formula, compressed wood anchoring, slip casting or Anchor Agent bond-anchorage, bracing type umbrella shape soil anchor anchor head etc.These anchorage styles are subject to the restriction of Construction Technology level, have many deficiencies.For example, compressed wood is anchored in the soil body anchoring difficulty is installed, operation inconvenience, and water injection time and expansion time are difficult to control, and the anchoring strength of the soil body is inadequate, easily causes measuring point in hole to move, and makes monitored data inaccurate; The anchoring of claw hook formula, claw hook place destroys soil structures, causes soil body anchoring strength inadequate, and poor reliability, makes measuring point in hole depart from actual monitoring point, brings larger error; Bracing type umbrella shape soil anchor anchor head, in the time that umbrella shape soil anchor struts, causes soil structures to destroy, and especially easily causes aperture Study on Soil Collapse, and soil body anchoring strength is reduced, and anti-slide performance declines, and affects soil body anchoring effect; While adopting slip casting or Anchor Agent anchoring, the slip casting time is long, construction inconvenience, and in utmost point soft layer, anchoring effect is not good, causes anchoring strength unreliable, brings measure error, affects the precision of data.
Traditional land movement meter anchor head is in sum inapplicable to soft clay area, especially at rich water soft stratum, because soil body self-stability is poor, water permeability, watery are good, and the destruction of causing soil structures when anchor head anchoring, significantly reduces anchored force, and lack aperture guard device, easily cause collapse hole, make to measure inaccurate, and rarely have report about the correlative study of soft soil layer air heave type multiple position extensometer anchor head.Compare above-mentioned traditional land movement meter anchor head, soft soil layer air heave type multiple position extensometer anchor head has the advantages such as range is large, simple in structure, anchoring effect is good, anti-slide performance is strong, easy construction, dependable performance.
Chinese patent CN 1415805A ship anchor type anchor opening mode scholar anchor anchor head, mainly comprise: thin-wall copper pipe, anchor are grabbed footstock, piston pushing body, strut and anchor and grabbed, anchor is grabbed footstock and is fixedly connected with thin-wall steel tube, strut base and anchor that strut two connects respectively piston pushing body by movable pin are grabbed, the head that anchor is grabbed is grabbed footstock by movable pin and anchor and is connected, the middle part that anchor is grabbed is connected with strut by movable pin, and anchor head rear portion arranges connecting hole and is connected with anchor cable.But this patent is relatively applicable to the anchoring in soil property foundation ditch, side slope wall, the anchoring of the weak soft soil layer of inapplicable and rich water, opens incision anchor hole hole wall if utilize high pressure grouting that anchor is grabbed, and the destruction that can cause soil structures affects the precision of survey data.
Chinese patent CN 207622U tube-joint anchored multipoint displacement meter, this device comprises pipe seam formula anchor head, pipe seam formula anchor head is the taper type anchor head with seam that spring steel is made, and be furnished with opening tail circle and hangnail, but this anchor head is mainly used in batholith, roadway, chamber and Tunnel Lamp geotechnical engineering, and can not be used for the anchoring on software stratum.
Chinese patent CN 2078375U ground Multi-point displacement metre for drilling hole, mainly, from anchor head, overhanging type or convex spring leaf and survey chi composition, anchor head is larger by middle bore, three sections of reduced pipes that crack that two ends bore is little are fixedly connected with.This patent is applicable to weak stratum, coal body and soil layer and measures, but is not suitable for the software stratum of rich water weakness, and the destruction of easily causing anchorage point soil structures, makes soil body anchored force deficiency, affects the precision of displacement measurement.
Summary of the invention
Object of the present invention be exactly provide in order to overcome the defect that above-mentioned prior art exists that a kind of range is large, simple in structure, anchoring effect is good, anti-slide performance is strong, the air heave type multiple position extensometer anchor head for soft soil layer of easy construction, dependable performance.
Object of the present invention can be achieved through the following technical solutions:
A kind of air heave type multiple position extensometer anchor head for soft soil layer, this anchor head comprises multiple air heave type anchorage heads, a hollow centre pipe and the high-pressure aerated pipe being equal to air heave type anchorage head quantity, in described air heave type anchorage head, be provided with air bag, the outside of described air heave type anchorage head is provided with triangular anchor and grabs, the two ends up and down of each air heave type anchorage head are respectively equipped with upper joint sleeve pipe and lower joint sleeve pipe, described hollow centre pipe runs through each air heave type anchorage head successively, and be connected with upper joint sleeve pipe and lower joint sleeve pipe on each air heave type anchorage head respectively, one end of described high-pressure aerated pipe is connected with ground high pressure inflator, the other end penetrates hollow centre pipe and gos deep into respectively the inside air bag in each air heave type anchorage head,
In the time of the air bag unaerated of air heave type anchorage head, triangular anchor is grabbed gathering, makes this anchor head conveniently put into boring, and in the time of the airbag aeration of air heave type anchorage head, triangular anchor is grabbed in hole rapidly synchronous expansion and cut soft soil layer and complete anchoring.
On described upper joint sleeve pipe and lower joint sleeve pipe, be equipped with locking screw, described upper joint sleeve pipe is connected hollow centre pipe by upper lock screw with lower lock screw respectively with lower joint sleeve pipe.
Described upper joint sleeve pipe and lower joint sleeve pipe are provided with locating hole.
According to projected depth, can form air heave type multiple position extensometer anchor head, between upper and lower two air heave type anchorage heads, be connected with upper joint sleeve pipe by lower joint sleeve pipe separately.And position by locating hole, guarantee accurate positioning, improve measuring point precision.
Described air heave type anchorage head is provided with 2～5.
Each air heave type anchorage head is provided with four row's triangular anchors and grabs, and each row is provided with 6 triangular anchors and grabs, and four row's triangular anchors are grabbed 90 ° of angles each other.
Between air bag in described hollow centre pipe and air heave type anchorage head, be tightly connected.
Bonding by high strength glue sealing between air bag in described hollow centre pipe and air heave type anchorage head.
Air bag in described air heave type anchorage head is made up of high-strength pulling-resisting composite material.
Utilize airbag aeration principle, in the time of the air bag unaerated of air heave type anchorage head, triangular anchor is grabbed gathering, can conveniently put into boring; In the time of the airbag aeration of air heave type anchorage head, triangular anchor is grabbed in hole rapidly synchronous expansion and is cut soft soil layer and complete anchoring, 24 triangular anchors of each anchor head unit are grabbed and hole wall close contact, do not destroy the structure of weak soil simultaneously, avoid the holing generation of collapse hole phenomenon, enhancing anchor is grabbed the effect that contacts with hole wall, improves the anchored force of measuring point, ensures the reliability of anchoring.
Compared with prior art, the present invention has the following advantages and beneficial effect:
1, air heave type multiple position extensometer anchorage head of the present invention surface arranges triangular anchor and grabs, utilize its airbag aeration expansion principle, in the time of air bag unaerated, triangular anchor is grabbed gathering, can conveniently put into boring, in the time of air heave type anchorage head airbag aeration, triangular anchor is grabbed in hole rapidly synchronous expansion and is cut soft soil layer, not limited by field condition, easy for installation, simple in structure, reliability and stability are strong, anchoring effect good, anti-slide performance is strong, dependable performance.
2, air heave type triangular anchor of the present invention is grabbed the feature that outer is triangle, the structure that is conducive to cut soft soil layer and do not destroy the soil body, anchor is grabbed tightr with contacting of hole wall, improve the anti-slide performance of air heave type multiple position extensometer anchor head, anchoring effect is more reliable, applicable to the anchoring in soft soil layer different pore size.
3, the present invention have that range is large, precision is high, measuring process be not subject to construction disturb, unmanned for measure error, construction safety, installation are simple, measure convenient, operating efficiency advantages of higher.
Brief description of the drawings
Structural representation when Fig. 1 is unaerated of the present invention;
Fig. 2 is the present invention's structural representation while inflating;
Fig. 3 is plan structure schematic diagram of the present invention.
In figure, 1 is air heave type anchorage head, and 2 is upper joint sleeve pipe, and 3 is lower joint sleeve pipe, and 4 is upper lock screw, and 5 is lower lock screw, and 6 is hollow centre pipe, and 7 is boring, and 8 grab for triangular anchor, and 9 is high-pressure aerated pipe, and 10 is locking screw, and 11 is locating hole.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
Embodiment
For an air heave type multiple position extensometer anchor head for soft soil layer, its structure as shown in FIG. 1 to 3,
This anchor head comprises multiple air heave type anchorage heads 1, a hollow centre pipe 6 and the high-pressure aerated pipe 9 being equal to air heave type anchorage head 1 quantity, in air heave type anchorage head 1, be provided with air bag, the outside of air heave type anchorage head 1 is provided with triangular anchor and grabs 8, the two ends up and down of each air heave type anchorage head 1 are respectively equipped with upper joint sleeve pipe 2 and lower joint sleeve pipe 3, hollow centre pipe 6 runs through each air heave type anchorage head 1 successively, and be connected with upper joint sleeve pipe 2 and lower joint sleeve pipe 3 on each air heave type anchorage head 1 respectively, one end of high-pressure aerated pipe 9 is connected with ground high pressure inflator, the other end penetrates hollow centre pipe 6 and gos deep into respectively the inside air bag in each air heave type anchorage head 1, on upper joint sleeve pipe 2 and lower joint sleeve pipe 3, be equipped with locking screw 10, upper joint sleeve pipe 2 is connected hollow centre pipe 6 by upper lock screw 4 with lower lock screw 5 respectively with lower joint sleeve pipe 3.Upper joint sleeve pipe 2 is provided with locating hole 11 with lower joint sleeve pipe 3.Each air heave type anchorage head 1 is provided with four row's triangular anchors and grabs 8, and each row is provided with 6 triangular anchors and grabs 8, four row's triangular anchors and grab 8 90 ° of angles each other, is provided with altogether 24 triangular anchors and grabs 8 on an air heave type anchorage head 1.Bonding by high strength glue sealing between air bag in hollow centre pipe 6 and air heave type anchorage head 1.Air bag in air heave type anchorage head 1 is made up of high-strength pulling-resisting composite material.
According to projected depth, can form air heave type multiple position extensometer anchor head, between upper and lower two air heave type anchorage heads 1, be connected with upper joint sleeve pipe 2 by lower joint sleeve pipe 3 separately, and position by locating hole 11, guarantee accurate positioning, improve measuring point precision.Air heave type anchorage head 1 is provided with 2～5, adopts the combination of 3 air heave type anchorage heads 1 in the present embodiment.
Utilize airbag aeration principle, in the time of the air bag unaerated of air heave type anchorage head 1, as shown in Figure 1, triangular anchor is grabbed 8 gatherings, can conveniently put into boring 7.In the time of the airbag aeration of air heave type anchorage head 1, as shown in Figure 2, triangular anchor grab 8 in hole rapid synchronous expansion cut soft soil layer and complete anchoring, make 24 triangular anchors of each anchor head unit grab 8 with hole wall close contact, do not destroy the structure of weak soil, the generation of the 7 collapse hole phenomenons of avoiding holing, strengthens anchor and grabs and the effect that contacts of hole wall simultaneously, improve the anchored force of measuring point, ensure the reliability of anchoring.
The above-mentioned description to embodiment is can understand and apply the invention for ease of those skilled in the art.Person skilled in the art obviously can easily make various amendments to these embodiment, and General Principle described herein is applied in other embodiment and needn't passes through performing creative labour.Therefore, the invention is not restricted to the embodiment here, those skilled in the art are according to announcement of the present invention, and not departing from improvement and the amendment that category of the present invention makes all should be within protection scope of the present invention.
Claims (9)
1. the air heave type multiple position extensometer anchor head for soft soil layer, it is characterized in that, this anchor head comprises multiple air heave type anchorage heads, a hollow centre pipe and the high-pressure aerated pipe being equal to air heave type anchorage head quantity, in described air heave type anchorage head, be provided with air bag, the outside of described air heave type anchorage head is provided with triangular anchor and grabs, the two ends up and down of each air heave type anchorage head are respectively equipped with upper joint sleeve pipe and lower joint sleeve pipe, described hollow centre pipe runs through each air heave type anchorage head successively, and be connected with upper joint sleeve pipe and lower joint sleeve pipe on each air heave type anchorage head respectively, one end of described high-pressure aerated pipe is connected with ground high pressure inflator, the other end penetrates hollow centre pipe and gos deep into respectively the inside air bag in each air heave type anchorage head,
In the time of the air bag unaerated of air heave type anchorage head, triangular anchor is grabbed gathering, makes this anchor head conveniently put into boring, and in the time of the airbag aeration of air heave type anchorage head, triangular anchor is grabbed in hole rapidly synchronous expansion and cut soft soil layer and complete anchoring.
2. a kind of air heave type multiple position extensometer anchor head for soft soil layer according to claim 1, it is characterized in that, on described upper joint sleeve pipe and lower joint sleeve pipe, be equipped with locking screw, described upper joint sleeve pipe is connected hollow centre pipe by upper lock screw with lower lock screw respectively with lower joint sleeve pipe.
3. a kind of air heave type multiple position extensometer anchor head for soft soil layer according to claim 1, is characterized in that, described upper joint sleeve pipe and lower joint sleeve pipe are provided with locating hole.
4. a kind of air heave type multiple position extensometer anchor head for soft soil layer according to claim 1, is characterized in that, between upper and lower two air heave type anchorage heads, is connected with upper joint sleeve pipe by lower joint sleeve pipe separately.
5. a kind of air heave type multiple position extensometer anchor head for soft soil layer according to claim 1, is characterized in that, described air heave type anchorage head is provided with 2～5.
6. a kind of air heave type multiple position extensometer anchor head for soft soil layer according to claim 1, is characterized in that, each air heave type anchorage head is provided with four row's triangular anchors and grabs, and each row is provided with 6 triangular anchors and grabs, and four row's triangular anchors are grabbed 90 ° of angles each other.
7. a kind of air heave type multiple position extensometer anchor head for soft soil layer according to claim 1, is characterized in that, between the air bag in described hollow centre pipe and air heave type anchorage head, is tightly connected.
8. a kind of air heave type multiple position extensometer anchor head for soft soil layer according to claim 7, is characterized in that, bonding by high strength glue sealing between the air bag in described hollow centre pipe and air heave type anchorage head.
9. a kind of air heave type multiple position extensometer anchor head for soft soil layer according to claim 1, is characterized in that, the air bag in described air heave type anchorage head is made up of high-strength pulling-resisting composite material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210480367.9A CN103835277B (en) | 2012-11-22 | 2012-11-22 | A kind of air heave type multiple position extensometer anchor head for soft soil layer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210480367.9A CN103835277B (en) | 2012-11-22 | 2012-11-22 | A kind of air heave type multiple position extensometer anchor head for soft soil layer |
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| CN103835277A true CN103835277A (en) | 2014-06-04 |
| CN103835277B CN103835277B (en) | 2016-02-17 |
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| CN201210480367.9A Expired - Fee Related CN103835277B (en) | 2012-11-22 | 2012-11-22 | A kind of air heave type multiple position extensometer anchor head for soft soil layer |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105862874A (en) * | 2016-04-14 | 2016-08-17 | 浙江科技学院 | Protection method for controlling deformation of building structure close to foundation pit |
| CN110130332A (en) * | 2019-05-07 | 2019-08-16 | 兰州理工大学 | A kind of ground anchored structure |
| CN112050712A (en) * | 2020-08-22 | 2020-12-08 | 深圳华力岩土工程有限公司 | Displacement measuring device for surveying |
| CN112504337A (en) * | 2020-11-30 | 2021-03-16 | 同济大学 | Soft soil precipitation and recharge model test device based on optical fiber monitoring |
| CN112629723A (en) * | 2020-11-26 | 2021-04-09 | 上海城建市政工程（集团）有限公司 | High-precision multi-depth air bag type soil pressure gauge |
| CN112857642A (en) * | 2020-11-26 | 2021-05-28 | 上海城建市政工程（集团）有限公司 | Method for measuring soil pressure in multiple depths |
| CN114136255A (en) * | 2021-11-30 | 2022-03-04 | 重庆大学 | Measurement point self-locking structure and multipoint displacement meter with same |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2076227U (en) * | 1990-06-06 | 1991-05-01 | 中国矿业大学 | Tube-joint anchored multipoint displacement meter |
| CN2078375U (en) * | 1990-11-19 | 1991-06-05 | 王海亮 | Multi-point displacement meter for drilling in rock and soil |
| CN101638902A (en) * | 2009-08-20 | 2010-02-03 | 高飞 | Method for measuring pile shaft internal force and cross section displacement in vertical dead-load test of foundation pile |
| JP2012068052A (en) * | 2010-09-21 | 2012-04-05 | Asahi Kasei Construction Materials Co Ltd | Ground property testing device |
| CN102518110A (en) * | 2011-12-23 | 2012-06-27 | 基康仪器(北京)有限公司 | Device and method for measuring soil body displacement |
-
2012
- 2012-11-22 CN CN201210480367.9A patent/CN103835277B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2076227U (en) * | 1990-06-06 | 1991-05-01 | 中国矿业大学 | Tube-joint anchored multipoint displacement meter |
| CN2078375U (en) * | 1990-11-19 | 1991-06-05 | 王海亮 | Multi-point displacement meter for drilling in rock and soil |
| CN101638902A (en) * | 2009-08-20 | 2010-02-03 | 高飞 | Method for measuring pile shaft internal force and cross section displacement in vertical dead-load test of foundation pile |
| JP2012068052A (en) * | 2010-09-21 | 2012-04-05 | Asahi Kasei Construction Materials Co Ltd | Ground property testing device |
| CN102518110A (en) * | 2011-12-23 | 2012-06-27 | 基康仪器(北京)有限公司 | Device and method for measuring soil body displacement |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105862874A (en) * | 2016-04-14 | 2016-08-17 | 浙江科技学院 | Protection method for controlling deformation of building structure close to foundation pit |
| CN105862874B (en) * | 2016-04-14 | 2017-09-19 | 浙江科技学院 | A kind of means of defence for controlling closing foundation ditch construction of structures to deform |
| CN110130332A (en) * | 2019-05-07 | 2019-08-16 | 兰州理工大学 | A kind of ground anchored structure |
| CN112050712A (en) * | 2020-08-22 | 2020-12-08 | 深圳华力岩土工程有限公司 | Displacement measuring device for surveying |
| CN112050712B (en) * | 2020-08-22 | 2021-11-16 | 深圳华力岩土工程有限公司 | Displacement measuring device for surveying |
| CN112629723A (en) * | 2020-11-26 | 2021-04-09 | 上海城建市政工程（集团）有限公司 | High-precision multi-depth air bag type soil pressure gauge |
| CN112857642A (en) * | 2020-11-26 | 2021-05-28 | 上海城建市政工程（集团）有限公司 | Method for measuring soil pressure in multiple depths |
| CN112504337A (en) * | 2020-11-30 | 2021-03-16 | 同济大学 | Soft soil precipitation and recharge model test device based on optical fiber monitoring |
| CN112504337B (en) * | 2020-11-30 | 2022-05-13 | 同济大学 | Soft soil precipitation and recharge model test device based on optical fiber monitoring |
| CN114136255A (en) * | 2021-11-30 | 2022-03-04 | 重庆大学 | Measurement point self-locking structure and multipoint displacement meter with same |
| CN114136255B (en) * | 2021-11-30 | 2024-02-02 | 重庆大学 | Measuring point self-locking structure and multi-point displacement meter with same |
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| CN103835277B (en) | 2016-02-17 |
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