CN103195045B - An a kind of hole concrete dynamic modulus WG embedded device - Google Patents
An a kind of hole concrete dynamic modulus WG embedded device Download PDFInfo
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- CN103195045B CN103195045B CN201310115987.7A CN201310115987A CN103195045B CN 103195045 B CN103195045 B CN 103195045B CN 201310115987 A CN201310115987 A CN 201310115987A CN 103195045 B CN103195045 B CN 103195045B
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Abstract
The invention discloses an a kind of hole concrete dynamic modulus WG embedded device, comprise lower filter layers, midfoot support separate layer, top sealing of hole layer and peripheral topping.Lower filter layers adopts the medium sand of about 15cm or fine sand to fill; Midfoot support separate layer is clay particle filling thickness; Top sealing of hole layer adopts 20cm swell soil or rich clay to fill; Peripheral topping is the water permeability woven bag made by polypropylene material.Manufacture craft of the present invention is simple, with low cost, and globality is strong, and the pore pressure gauge caused because of collapse hole can be avoided to bury difficulty underground, and the reading of pore pressure gauge truly can reflect the hole pressure Changing Pattern of different depth in same perpendicular.
Description
Technical field
The invention belongs to technical field of civil engineering, relate to an a kind of hole concrete dynamic modulus WG embedded device.
Background technology
At present, need to carry out pore pressure gauge when testing soft base pore water pressure to bury underground.Current Chinese code of practice recommends a hole to bury a pore pressure gauge underground.This method has certain shortcoming, and the pore water pressure namely measured is not the pore water pressure of same point along different depth position, and that is test data lacks comparativity.In addition, adopt drilling rod to be pressed into by pore pressure gauge in mud and pore pressure gauge can be caused to produce excess pore water pressure, its regular hour of dissipating need be waited just to measure accurate data.
The second way: the darkest pore pressure gauge is undertaken by the first way; Then carry out the design elevation of sealing of hole to the second pore pressure gauge with the mud ball that swell soil is made, the like until all pore pressure gauges are buried underground complete.Its major defect is: (1) the darkest pore pressure gauge can produce the shortcoming in the first way; (2) sealing of hole mud ball will sink to the more difficult control of assigned address, is difficult to ensure the quality of products, and even there will be the situation that pore pressure gauge encases by mud ball, causes test result regularity poor; (3) mud ball subsidence velocity slowly, because construction period is often so long no-wait in engineering.
The third way: the cage system made with wire gauze or plastic wire makes hole sealing device, the mud ball that hole sealing device adopts swell soil to make is as core sealing material, be filled in cage body as barrier material in conjunction with mud, clay or coarse sand again, then cage body is put into boring.Its major defect is: (1) cage body complex manufacturing technology, if batch production needs special equipment, certainly will increase cost; (2) cage body lengths are limited, bury underground spacing not wait multiple pore water pressure timing need make respectively length not wait multiple cage bodies, engineering quantity certainly will be increased; (3) the signal cable line destructible of process Pore Pressure meter is buried underground.
Therefore, a kind of reasonably pore pressure gauge embedded device of design, for protection pore pressure gauge and the accuracy ensureing observation data, has important practical engineering value.
Summary of the invention
The object of the present invention is to provide an a kind of hole concrete dynamic modulus WG embedded device, can be used for the use burying multiple pore pressure gauge in a hole underground, thus obtain the reliability data of soft subgrade soil body pore water pressure along change in depth rule.
An a kind of hole concrete dynamic modulus WG embedded device; it is characterized in that: this device is filtering layer (1) from bottom to top; middle part is for supporting separate layer (2); top is sealing of hole layer (3); periphery is topping (4); described filtering layer (1) inside has a ventage piezometer (5), and this ventage piezometer (5) has a ventage piezometer cable (6).
Described bottom filtering layer (1) filler is medium sand or fine sand, and midfoot support separate layer (2) packing material is clay particle, and top sealing of hole layer (3) packing material is swell soil or rich clay particle.
The water permeability woven bag that described peripheral topping (4) weaves for polypropylene material.
Described bottom filtering layer filling thickness is about about 15cm, is as the criterion can wrap up pore pressure gauge completely.
Described top sealing of hole layer 3 filling thickness is 20cm.
An a kind of hole concrete dynamic modulus WG embedded device, it is characterized in that: this device comprises multiple device as claimed in claim 1, described midfoot support separate layer (2) filling thickness equals upper and lower pore pressure gauge spacing and deducts 25cm.
Advantageous Effects:
1. a hole concrete dynamic modulus WG embedded device effectively prevent may because of soil condition in the plane distance change, and cause the pore pressure gauge reading not pore water pressure of different depth in same perpendicular, ensure that the continuity of observation data.
2. main body woven bag is conventional sand wick woven bag, is easy to buy, cheap; It is consistent with bagged sand drain construction technique, simple and reliable that brill buries technique, can carry out the same period, significantly reduce and bury cost underground with bagged sand drain construction.
Accompanying drawing illustrates:
Fig. 1 structural representation of the present invention.
1-filtering layer, 2-separates supporting layer, 3-sealing of hole layer, 4-topping, 5-pore pressure gauge, 6-pore pressure gauge signal cable line.
Detailed description of the invention
Below in conjunction with concrete example to invention has been further description.
An a kind of hole concrete dynamic modulus WG embedded device; it is characterized in that: this device is filtering layer (1) from bottom to top; middle part is for supporting separate layer (2); top is sealing of hole layer (3); periphery is topping (4); described filtering layer (1) inside has a ventage piezometer (5), and this ventage piezometer (5) has a ventage piezometer cable (6).
Described bottom filtering layer (1) filler is medium sand or fine sand, and midfoot support separate layer (2) packing material is clay particle, and top sealing of hole layer (3) packing material is swell soil or rich clay particle.
The water permeability woven bag that described peripheral topping (4) weaves for polypropylene material.
Described bottom filtering layer filling thickness is about about 15cm, is as the criterion can wrap up pore pressure gauge completely.
Described top sealing of hole layer 3 filling thickness is 20cm.
An a kind of hole concrete dynamic modulus WG embedded device, it is characterized in that: this device comprises multiple device as claimed in claim 1, described midfoot support separate layer (2) filling thickness equals upper and lower pore pressure gauge spacing and deducts 25cm.
Certainly; the above is only one embodiment of the present invention; should be understood that those skilled in the art; under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications all belong within the protection domain of the claims in the present invention.
Claims (1)
1. a hole concrete dynamic modulus WG embedded device, it is characterized in that: this device comprises multiple element of construction in the vertical direction, described element of construction is bottom filtering layer, midfoot support separate layer, top sealing of hole layer from bottom to top, periphery is topping, filtering layer inside, described bottom has a pore pressure gauge, and this pore pressure gauge has a pore pressure gauge cable;
Described bottom filtering layer filler is medium sand or fine sand, and midfoot support separate layer packing material is clay particle, and top sealing of hole layer packing material is swell soil or rich clay particle;
Described peripheral topping is the water permeability sand wick woven bag of polypropylene material braiding;
Described bottom filtering layer filling thickness is 15cm, is as the criterion can wrap up pore pressure gauge completely;
Described top sealing of hole layer filling thickness is 20cm;
Described midfoot support separate layer filling thickness equals upper and lower pore pressure gauge spacing and deducts 25cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310115987.7A CN103195045B (en) | 2013-03-25 | 2013-03-25 | An a kind of hole concrete dynamic modulus WG embedded device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310115987.7A CN103195045B (en) | 2013-03-25 | 2013-03-25 | An a kind of hole concrete dynamic modulus WG embedded device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103195045A CN103195045A (en) | 2013-07-10 |
| CN103195045B true CN103195045B (en) | 2016-02-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310115987.7A Active CN103195045B (en) | 2013-03-25 | 2013-03-25 | An a kind of hole concrete dynamic modulus WG embedded device |
Country Status (1)
| Country | Link |
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| CN (1) | CN103195045B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105256785B (en) * | 2015-10-30 | 2017-02-01 | 湖南科技大学 | Device capable of repeatedly utilizing pore water pressure gauges and manufacturing method of device |
| CN108951595A (en) * | 2018-08-03 | 2018-12-07 | 长安大学 | One kind porous water pressure gauge in one hole buries structure and method for embedding |
| CN109827702A (en) * | 2018-10-12 | 2019-05-31 | 上海港湾工程质量检测有限公司 | Pore pressure gauge and pore water pressure force test device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03279592A (en) * | 1990-03-28 | 1991-12-10 | Pub Works Res Inst Ministry Of Constr | Filler for hole |
| JP2002348847A (en) * | 2001-05-24 | 2002-12-04 | Fujikura Ltd | Method for investigating seabottom feature |
| CN201933477U (en) * | 2010-12-29 | 2011-08-17 | 上海广联建设发展有限公司 | Deep embedding device for pore pressure gauge |
| CN203256721U (en) * | 2013-03-25 | 2013-10-30 | 长沙理工大学 | Device for embedding multiple pore water pressure gauges in one hole |
-
2013
- 2013-03-25 CN CN201310115987.7A patent/CN103195045B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03279592A (en) * | 1990-03-28 | 1991-12-10 | Pub Works Res Inst Ministry Of Constr | Filler for hole |
| JP2002348847A (en) * | 2001-05-24 | 2002-12-04 | Fujikura Ltd | Method for investigating seabottom feature |
| CN201933477U (en) * | 2010-12-29 | 2011-08-17 | 上海广联建设发展有限公司 | Deep embedding device for pore pressure gauge |
| CN203256721U (en) * | 2013-03-25 | 2013-10-30 | 长沙理工大学 | Device for embedding multiple pore water pressure gauges in one hole |
Non-Patent Citations (2)
| Title |
|---|
| 付贵海等.深厚软土地区孔隙水压力计埋设技术研究.《铁道建筑》.2010,(第11期),第72-75页. * |
| 孔隙水压力计埋设过程中的问题研究;赵秀绍等;《金属矿山》;20070630(第6期);第47-50页 * |
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| CN103195045A (en) | 2013-07-10 |
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