CN103410136A - Drilling burying method of soil moisture meter - Google Patents
Drilling burying method of soil moisture meter Download PDFInfo
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- CN103410136A CN103410136A CN2013103861686A CN201310386168A CN103410136A CN 103410136 A CN103410136 A CN 103410136A CN 2013103861686 A CN2013103861686 A CN 2013103861686A CN 201310386168 A CN201310386168 A CN 201310386168A CN 103410136 A CN103410136 A CN 103410136A
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Abstract
The invention discloses a drilling burying method of a soil moisture meter. The buried soil moisture meter comprises a testing element and an observing electric cable connected with the testing element. A probe is arranged at the bottom of the testing element. The method comprises the steps that first, a burying hole is drilled; second, the soil moisture meter is buried, the burying process is that sampling and mounting soil sample manufacturing are carried out, namely soil samples are taken at the burying position of the soil moisture meter and are made into a mounting soil sample which is a cylinder-shaped soil cylinder with the diameter smaller than the hole diameter of the burying hole; the testing element is fixed, namely the probe arranged at the bottom of the testing unit is inserted in the upper portion of the mounting soil sample; the soil moisture meter is placed down, the burying hole is refilled, namely after the burying hole is refilled until the buried soil moisture meter reaches the burying position, the mounting soil sample fixedly provided with the testing element is placed down to a proper position, and then the burying hole is refilled again. The steps of the method are simple, implementation is easy, investment cost is low, using effect is good, burying depth is not limited, and burying point locating is accurate.
Description
Technical field
The invention belongs to the geotechnical engineering monitoring technical field, especially relate to a kind of boring method for embedding of soil moisture meter.
Background technology
The western Gullied Rolling Loess Region of China, with the form development & construction land used of " fill out ditch and make ground ", has formed the high embankment engineering of a large amount of loess.Due to " fill out ditch and make ground ", changed the initial land form landforms in place, the supply of underground water, runoff, Escape condition etc. also change thereupon, and underground water distributes and will change.Build in place the poorly plastid such as special soils such as often being distributed with collapsible loess and High Loess Slope, after the collapsible loess immersion, significant additional deformation will occur in the soil body, affect the safe handling of following surface structures facility, strength decreased after High Loess Slope soil body chance water, landslide easily occurs and wait geological disaster, in above-mentioned geotechnical engineering problems and soil, the variation of moisture content is closely related.Therefore, the moisture content of the monitoring soil body changes, and will help to judge whether the high embankment filling body of loess and original place matrix be stable at post-construction deformation, understands the groundwater change situation of the high embankment engineering of loess, the security and stability of prediction High Loess Slope.
The soil moisture meter is most popular soil moisture content monitoring instrument in the world, determines volumetric soil water content thereby its principle is the dielectric constant that the spread speed in medium is measured medium according to electromagnetic wave.Theory relation between the quality moisture content of commonly using on the volumetric water content that the soil moisture meter is surveyed and engineering is θ
ω=(ρ
D1/ ρ
ω) * ω, wherein, θ
ωFor volumetric water content, ω is the quality moisture content, ρ
D1For the dry density of sample, ρ
ωFor the density of water, quality water cut test method can be referring to " Standard for test methods of earthworks ".Application soil moisture timing in the geotechnical engineering monitoring, often need know the corresponding quality moisture content of soil moisture volumetric water content that meter is surveyed, need to measure the quality moisture content and dry density of the soil moisture instrumentation examination position soil body, set up the functional relation of soil moisture volumetric water content that meter is surveyed and quality moisture content.The ingredient of soil moisture meter comprises with the testing element of probe and by the Cables for Dam Observation of transfer of data that testing element is surveyed to ground and forming, while burying underground, the probe on testing element all need to be inserted to the tested soil body, the Cables for Dam Observation of soil moisture meter is caused to ground.
Nowadays, adopt prospect pit the soil moisture meter can be buried underground to test position, but the cutting depth of prospect pit is limited, generally be no more than 40m, the soil moisture meter can't be buried underground to deep-seated more and put, and installation personnel need to descend in prospect pit to work, labour intensity is large, poor stability and cost high.Existing boring method for embedding mainly contains two kinds: a kind of is when being drilled to next-door neighbour soil moisture meter burial place place, get one of undisturbed soil sample and measure moisture content and dry density, then at the bottom of adopting erecting tools by the direct patchhole of soil moisture meter, in a boring, a soil moisture meter can only be installed, when need are monitored the moisture content situation of change of the different depth place soil body, need probing identical with the soil moisture counting order of required installation, the boring that the degree of depth is different, this will increase workload greatly, labour intensity and bury cost underground, and when soil property is hard, be difficult to soil moisture meter probe is inserted in soil, another kind of mode is that a plurality of soil moisture instrumentation examination elements are directly put to the interior monitoring degree of depth of boring, then adopt the scattered seed earth material to carry out simple backfill, the method is difficult to guarantee soil moisture meter probe and soil body close contact on the one hand, backfill in boring is without compacting on the other hand, permeability is greater than the permeability of original soil on every side, when water infiltrates from top to bottom, water will first permeate the ground in holing, the data of surveying can not accurately reflect the actual change situation of moisture content on time and space of the different depth soil body in the monitoring place, in addition, owing to can't obtaining the quality moisture content and dry density data of testing element at the test position place soil body, also can't carry out the conversion of volumetric water content and quality moisture content, can only obtain the volumetric water content monitored data.
Summary of the invention
Technical problem to be solved by this invention is for above-mentioned deficiency of the prior art, a kind of boring method for embedding of soil moisture meter is provided, its method step is simple, realize convenient and input cost is lower, result of use is good, and the depth of burying is unrestricted and to bury point location underground accurate.
For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of boring method for embedding of soil moisture meter, the soil moisture meter of burying underground comprises testing element and the Cables for Dam Observation of joining with testing element, described testing element bottom is provided with probe, it is characterized in that the method comprises the following steps:
Step 201, sampling and soil sample is installed and makes: in the burial place soil sampling of burying underground soil moisture meter and make the installation soil sample, described installation soil sample is that cylindrical earth pillar and its diameter are less than the aperture of burying hole underground;
Step 202, testing element are fixed: the set probe in testing element bottom is inserted into soil sample top is installed;
The hole backfill is transferred and buried underground to step 203, soil moisture meter: after burying hole underground and being backfilled to the burial place place of burying underground soil moisture meter, the installation soil sample that is fixed with testing element is transferred and put in place, then carry out backfill to burying hole underground.
The boring method for embedding of above-mentioned a kind of soil moisture meter is characterized in that: the quantity of the soil moisture meter of burying underground is a plurality of, and a plurality of described soil moisture meters are laid from the bottom to top, and the method for embedding of a plurality of described soil moisture meters is all identical; In step 2, carry out the soil moisture meter while burying underground, from the bottom to top a plurality of described soil moisture score are not buried underground according to step 201 to the method described in step 203; After the installation soil sample that will be fixed with testing element in step 203 is transferred and put in place, while to burying hole underground, carrying out backfill, will bury hole underground and be backfilled to the burial place place of a upper described soil moisture meter.
The boring method for embedding of above-mentioned a kind of soil moisture meter is characterized in that: the burial place fetch earth at burying underground soil moisture meter in step 201 is undisturbed soil sample or disturbed sample;
When soil sample was undisturbed soil sample, the quantity of the undisturbed soil sample of getting was two, and two described undisturbed soil samples comprise soil sample and the soil sample for the fabrication and installation soil sample be used to testing soil moisture content and dry density;
When soil sample is disturbed sample, utilizes the disturbed sample fabrication and installation soil sample of getting, and soil moisture content and the dry density of made installation soil sample are tested; The soil moisture content of described installation soil sample and dry density are all identical with soil moisture content and the dry density at the burial place place of burying underground soil moisture meter.
The boring method for embedding of above-mentioned a kind of soil moisture meter is characterized in that: before in step 203, the installation soil sample that is fixed with testing element being transferred, first Cables for Dam Observation is connected on testing element; When the installation soil sample that is fixed with testing element was transferred, Cables for Dam Observation was together transferred with testing element; After the installation soil sample that is fixed with testing element is transferred and is put in place, first Cables for Dam Observation is gently moved to a side of burying hole underground, then the location soil ball by free-falling by Cables for Dam Observation be extruded onto with the hole wall of burying hole underground near, to burying hole underground, carry out backfill afterwards.
The boring method for embedding of above-mentioned a kind of soil moisture meter is characterized in that: while in step 203, the installation soil sample that is fixed with testing element being transferred, adopt hanging apparatus to transfer; Described hanging apparatus comprises and is wrapped in the hoisting rope that gauze bag that the soil sample outside is installed and colligation are fixed on gauze bag top, and in decentralization process, hoisting rope is coaxial laying with the installation soil sample.
The boring method for embedding of above-mentioned a kind of soil moisture meter, it is characterized in that: in step 203 behind the burial place place that buries hole underground and be backfilled to burying underground soil moisture meter and before the installation soil sample that will be fixed with testing element transfers, first to burying the scattered seed undisturbed soil after backfill 3cm～5cm in hole underground; After the installation soil sample that is fixed with testing element is transferred and is put in place, again to burying backfill scattered seed undisturbed soil in hole underground so that the space of soil sample being installed and bury underground between hole is filled, and make testing element imbed in the scattered seed undisturbed soil of institute's backfill, to burying hole underground, carry out, in backfill and backfilling process, backfill is carried out to compaction in layers more afterwards.
The boring method for embedding of above-mentioned a kind of soil moisture meter is characterized in that: the burial place fetch earth at burying underground soil moisture meter in step 201 is undisturbed soil sample; In step 1, drill through while burying hole underground, while adopting rig to creep into burial place top 35cm to burying underground soil moisture meter～45cm from top to bottom, complete boring procedure; While in step 2, getting described undisturbed soil sample, first adopt soil sampler clear hole 15cm～25cm downwards, then adopt soil sampler successively to get the described undisturbed soil sample that two height are 15cm～20cm.
The boring method for embedding of above-mentioned a kind of soil moisture meter is characterized in that: before in step 202, the set probe in testing element bottom being inserted into to installation soil sample top, first outside soil sample is installed, a protective sleeve is installed; In step 202, the set probe in testing element bottom is inserted into soil sample top is installed after and in step 203, carry out before the soil moisture meter buries underground, the test value of testing element under current state is carried out to record.
The boring method for embedding of above-mentioned a kind of soil moisture meter is characterized in that: before in step 203, the installation soil sample that is fixed with testing element being transferred, soil sample top first will be installed and cut into truncated cone; After the installation soil sample that is fixed with testing element is transferred and put in place, carry out, in backfill and backfilling process, backfill is carried out to compaction in layers to burying hole underground, the density of backfill compacting is not less than the density of burying the hole week side soil body underground.
The boring method for embedding of above-mentioned a kind of soil moisture meter, it is characterized in that: before in step 202, the set probe in testing element bottom being inserted into to installation soil sample top, first adopt rig to drill through a plurality of installing holes of installing for probe respectively on installation soil sample top, the aperture of described installing hole is that 2/3～3/4 and its hole depth of probe diameter is identical with the length of probe.
The present invention compared with prior art has the following advantages:
1, method step is simple, easy and simple to handle and realize convenient, easy operating, and input cost is lower.
2, the installation in position of soil moisture meter and bury hole underground to be backfilling and compacted process operation all very easy, the installation rate of soil moisture meter is fast, installation quality is high and labour intensity is low, it is low to drop into construction cost.
3, the installation soil sample adopted is simple in structure, reasonable in design and result of use is good, use value is high, by soil sample is installed, the soil moisture meter is installed, not only mounting method is easy, realization is convenient, and can easy, effectively guarantee soil moisture meter probe and soil body close contact, and the dry density that soil sample is installed is all identical with undisturbed soil with moisture content, thereby can effectively guarantee the measuring accuracy of soil moisture meter; On the other hand, owing to burying backfill in hole underground, process through compacting, the permeability of backfill is approximate identical with the permeability of original soil on every side, thereby institute's data of surveying can more accurately reflect the actual change situation of moisture content on time and space of monitoring the different depth soil body in place.Simultaneously, the method that the probe plug-in mounting enters to install soil sample is simple, directly inserts and gets final product; When if the hard probe of installation soil sample soil property can not directly insert, only need drill through corresponding installing hole on installation soil sample top and get final product.
4, soil sample is installed and adopts undisturbed soil sample or disturbed sample, sampling is convenient and actual fabrication is easy, during practice of construction, the preferred undisturbed soil sample of soil sample is installed; When being subject to soil condition undisturbed soil sample can't be taken out, adopt disturbed sample.
5, convenience is laid in simple in structure, the reasonable in design and processing and fabricating of installation soil sample hanging apparatus and installation, result of use is good, the decentralization process that can be easy, completes fast the installation soil sample that is fixed with testing element, simultaneously the permeance property of gauze bag that adopts good, can not cause to the test data of soil moisture meter any harmful effect.
6, install soil sample transfer put in place after and to burying underground before hole carries out backfill, adopt the Cables for Dam Observation that the native ball in location pair and testing element join to position, not only easy and simple to handle, realize conveniently, and input cost is lower, good positioning effect.
7, result of use is good and practical value is high, popularizing application prospect is extensive, can not only in same boring, a plurality of soil moisture meters be mounted to monitoring location accurately, and can simultaneously soil moisture volumetric water content that meter is surveyed be converted into to quality moisture content commonly used in engineering, in the engineering of being more convenient for, apply.Simultaneously, the soil moisture meter is buried process underground and is subjected to the soil condition restriction little, and the depth of burying is unrestricted, buries point location underground accurate.
In sum, the inventive method step is simple, realization is convenient and input cost is lower, result of use is good, and the process of burying underground is subjected to the soil condition restriction little, and the depth of burying is unrestricted, buries point location underground accurate.
Below by drawings and Examples, technical scheme of the present invention is described in further detail.
The accompanying drawing explanation
Fig. 1 is method for embedding FB(flow block) of the present invention.
To be the present invention insert the Construction State schematic diagram when soil sample is installed by probe to Fig. 2.
Fig. 3 is that the present invention will install the Construction State schematic diagram of soil sample while packing hanging apparatus into.
Fig. 4 is the top view of Fig. 3.
Fig. 5 is that the present invention installs soil sample and transfers the Construction State schematic diagram while putting in place.
Fig. 6 is that the present invention installs soil sample and transfers the rear Construction State schematic diagram when burying hole underground and carry out backfill that puts in place.
Description of reference numerals:
The specific embodiment
The boring method for embedding of a kind of soil moisture meter as shown in Figure 1, the soil moisture meter of burying underground comprises testing element 2 and the Cables for Dam Observation 6 of joining with testing element 2, and described testing element 2 bottoms are provided with probe 3, and the method comprises the following steps:
Step 201, sampling and soil sample is installed and makes: in the burial place soil sampling of burying underground soil moisture meter and make soil sample 1 is installed, described installation soil sample 1 is buried 10De aperture, hole underground for cylindrical earth pillar and its diameter are less than.
Step 202, testing element are fixed: the testing element 2 set probes 3 in bottom are inserted into soil sample 1 top is installed, refer to Fig. 2.
The hole backfill is transferred and buried underground to step 203, soil moisture meter: after burying hole 10 underground and being backfilled to the burial place place of burying underground soil moisture meter, the installation soil sample 1 that is fixed with testing element 2 is transferred and put in place, then carry out backfill to burying hole 10 underground.
In the present embodiment, the quantity of the soil moisture meter of burying underground is a plurality of, and a plurality of described soil moisture meters are laid from the bottom to top, and the method for embedding of a plurality of described soil moisture meters is all identical.In step 2, carry out the soil moisture meter while burying underground, from the bottom to top a plurality of described soil moisture score are not buried underground according to step 201 to the method described in step 203.After the installation soil sample 1 that will be fixed with testing element 2 in step 203 is transferred and put in place, while to burying hole 10 underground, carrying out backfill, will bury hole 10 underground and be backfilled to the burial place place of a upper described soil moisture meter.
In the present embodiment, in step 1, drill through while burying hole 10 underground, adopt dry type to creep into the mode pore-forming, and the described 10De aperture, hole of burying underground is 150mm～180mm.During practice of construction, can according to specific needs, the pore size of burying hole 10 underground be adjusted accordingly.
In the practice of construction process, burial place fetch earth at burying underground soil moisture meter in step 201 is undisturbed soil sample, the quantity of the undisturbed soil sample of getting is two, and two described undisturbed soil samples comprise soil sample and the soil sample for fabrication and installation soil sample 1 be used to testing soil moisture content and dry density.
In the present embodiment, the burial place fetch earth at burying underground soil moisture meter in step 201 is undisturbed soil sample.In step 1, drill through while burying hole 10 underground, while adopting rig to creep into burial place top 35cm to burying underground soil moisture meter～45cm from top to bottom, complete boring procedure.During practice of construction, while in step 201, getting described undisturbed soil sample, first adopt soil sampler clear hole 15cm～25cm downwards, then adopt soil sampler successively to get the described undisturbed soil sample that two height are 15cm～20cm.
During practice of construction, the diameter that soil sample 1 is installed described in step 201 is described 10 apertures, hole of burying underground
The height that soil sample 1 is installed described in step 201 is greater than the length of probe 3.In the present embodiment, the long 3cm～8cm of length of the aspect ratio probe 3 of described installation soil sample 1, the diameter of described installation soil sample 1 is 108mm～120mm.
During practice of construction, before in step 202, the testing element 2 set probes 3 in bottom being inserted into to installation soil sample 1 top, first protective sleeve of soil sample 1 outside installation is being installed.
In the present embodiment, described protective sleeve comprises the cylindrical sleeve 4 formed by the iron sheet that is wrapped in installation soil sample 1 and is sleeved on the locking throat hoop 5 in the described cylindrical sleeve outside.During actual the use, by locking throat hoop 5, make cylindrical sleeve 4 and soil sample 1 close contact is installed, and then probe 3 is inserted into soil sample 1 top is installed.
In the present embodiment, before in step 202, the testing element 2 set probes 3 in bottom being inserted into to installation soil sample 1 top, first adopt rig on installation soil sample 1 top, to drill through a plurality of installing holes of installing for probe 3 respectively, the aperture of described installing hole is that 2/3～3/4 and its hole depth of probe 3 diameters is identical with the length of probe 3.Especially when the hard and probe 3 of the soil property that soil sample 1 is installed can't directly insert, need to adopt rig drill through the installing hole of installing for probe 3 soil sample 1 top is installed.
During practice of construction, in step 202, the testing element 2 set probes 3 in bottom are inserted into soil sample 1 top is installed after and in step 203, carry out before the soil moisture meter buries underground, the test value of testing element under current state 2 is carried out to record.In the present embodiment, in step 202, the testing element 2 set probes 3 in bottom are inserted into soil sample 1 top is installed after and in step 203 to installing before soil sample 1 transfers, the test value of testing element under current state 2 is carried out to record.
In the present embodiment, after the testing element 2 set probes 3 in bottom are inserted into to installation soil sample 1 top, first remove described protective sleeve.
In the present embodiment, before in step 202, the testing element 2 set probes 3 in bottom being inserted into to installation soil sample 1 top, the aerial initial testing value of burying underground soil moisture meter is carried out to record; And, before in step 203, installation soil sample 1 being transferred, the test value after burying underground soil moisture meter insertion installation soil sample 1 is carried out to record.
Before in step 203, the installation soil sample 1 that is fixed with testing element 2 being transferred, first Cables for Dam Observation 6 is connected on testing element 2.When the installation soil sample 1 that is fixed with testing element 2 was transferred, Cables for Dam Observation 6 was together transferred with testing element 2.
In conjunction with Fig. 3 and Fig. 4, in the practice of construction process, while in step 203, the installation soil sample 1 that is fixed with testing element 2 being transferred, adopt hanging apparatus to transfer; Described hanging apparatus comprises the gauze bag 7 that is wrapped in installation soil sample 1 outside and the hoisting rope 9 that colligation is fixed on gauze bag 7 tops, and in decentralization process, hoisting rope 9 is coaxial laying with installation soil sample 1.
In the present embodiment, described gauze bag 7 is formed by the colligation of twice gauze strip.Actually add man-hour, the length of the gauze strip that adopts is (2h+d+20cm)～(2h+d+30cm), and the described gauze strip of twice is wrapped in symmetrically soil sample 1 outside is installed, and wherein d is for installing the base diameter of soil sample 1, and h is for installing the height of soil sample 1.
Before in step 203, the installation soil sample 1 that is fixed with testing element 2 being transferred, how allly adopt adhesive tape 8 to be wound around at installation soil sample 1 middle part, so that fastening being fixed on of gauze bag 7 installed to soil sample 1 outside.In the present embodiment, adopt electrical adhesive tape to twine for 2～3 weeks around the middle part that soil sample 1 is installed, be fixed with the position to the described gauze strip of twice.
Actually add man-hour, the described gauze strip of twice top is provided with the through wires hole passed for hoisting rope 9, and fastens after a described hoisting rope 9 being passed to the through wires hole of the described gauze strip of twice end.Described hoisting rope 9 adopts nylon rope to make, and length is not less than the burial place of burying underground soil moisture meter to the distance of burying 10 apertures, hole underground, and the diameter of hoisting rope 9 is no more than 3mm and its intensity can be born the weight that are not less than 3 times of installation soil samples 1.
In the present embodiment, before in step 203, the installation soil sample 1 that is fixed with testing element 2 being transferred, soil sample 1 top first will be installed and cut into truncated cone.In the present embodiment, soil sample 1 upper cone platform bottom is installed and is positioned at 2cm position, electrical adhesive tape winding top.
As shown in Figure 5, in the present embodiment, in step 203 behind the burial place place that buries hole 10 underground and be backfilled to burying underground soil moisture meter and before the installation soil sample 1 that will be fixed with testing element 2 transfers, first to the scattered seed undisturbed soil of burying underground after the interior backfill 3cm～5cm in hole 10; After the installation soil sample 1 that is fixed with testing element 2 is transferred and is put in place, again to burying hole 10 interior backfill scattered seed undisturbed soil underground so that the space of soil sample 1 being installed and bury underground between hole 10 is filled, and make testing element 2 imbed in the scattered seed undisturbed soil of institute's backfill, to burying hole 10 underground, carry out, in backfill and backfilling process, backfill 13 is carried out to compaction in layers more afterwards.
Reality is carried out in decentralization process the installation soil sample 1 that is fixed with testing element 2, and Cables for Dam Observation 6 is transferred progressively and lengthened with installation soil sample 1, can not traction action be arranged to testing element 2.In the present embodiment, soil sample 1 is installed and puts to the thick scattered seed undisturbed soil of the about 10cm～15cm of backfill after at the bottom of hole, fill and soil sample 1 is installed and buries the hole between 10 hole walls of hole underground, and testing element 2 is buried in the earth.
In the present embodiment, while in step 203, adopting described hanging apparatus to transfer the installation soil sample 1 that is fixed with testing element 2, soil sample 1 free-falling under Gravitative Loads is installed.
During practice of construction, after the installation soil sample 1 that is fixed with testing element 2 is transferred and is put in place, first Cables for Dam Observation 6 is gently moved to a side of burying hole 10 underground, then the soil ball 11 of the location by free-falling by Cables for Dam Observation 6 be extruded onto with the hole wall of burying hole 10 underground near, to burying hole 10 underground, carry out backfill afterwards.In the present embodiment, the native ball 11 in described location is the native ball of outside parcel gauze, and described native ball is served as reasons and buried the interior undisturbed soil of getting in hole 10 underground and process.
In the present embodiment, wait the installation soil sample 1 that is fixed with testing element 2, transfer and put in place and while gently moving Cables for Dam Observation 6 to bury hole 10 1 sides underground hole wall, bury the sections of the Cables for Dam Observation 6 reserved long 0.5m～1m in hole 10 underground, transfer again afterwards the native ball 11 in location, locate native ball 11 and freely fall into and bury hole 10 underground and Cables for Dam Observation 6 be extruded on a side opening wall of burying hole 10 underground, the diameter of locating native ball 11 is slightly less than buries 10De aperture, hole underground.
In the present embodiment, soil sample 1 is installed puts at the bottom of hole and after the thick scattered seed undisturbed soil of the about 10cm～15cm of backfill, again Cables for Dam Observation 6 is gently moved to a side of burying hole 10 underground, afterwards again the soil of the location by free-falling ball 11 by Cables for Dam Observation 6 be extruded onto with the hole wall of burying hole 10 underground near.
During practice of construction, as shown in Figure 6, the installation soil sample 1 that will be fixed with testing element 2 in step 203 carries out, in backfill and backfilling process, backfill 13 is carried out to compaction in layers to burying hole 10 underground after transferring and putting in place, and the density after backfill 13 compactings is not less than the density of burying all side soil bodys in hole 10 underground.In the present embodiment, after the installation soil sample 1 that is fixed with testing element 2 is transferred and is put in place, to burying hole 10 underground, carry out, in backfilling process, backfill 13 is carried out to compaction in layers, then each backfill 10cm～15cm undisturbed soil (being specially from burying the undisturbed soil of hole 10 interior taking-ups underground), adopt hammer ram 12 freely falling body tamped backfills 13, the density of backfill 13 after compacting is not less than buries hole 11 density of undisturbed soil on every side underground.Described hammer ram 12 is smooth without corner angle, weight 5kg～10kg, and the hammer footpath is to bury 3/5～2/3 of hole 10 diameters underground, the hammer height is 10cm～15cm.
In the present embodiment, the density after described backfill 13 compactings is identical with the density of burying all side soil bodys in hole 10 underground, and required compacting work can be determined by field trial.
In the present embodiment, as different from Example 1: the burial place fetch earth at burying underground soil moisture meter in step 201 is disturbed sample, utilize the disturbed sample fabrication and installation soil sample 1 of getting, and soil moisture content and the dry density of made installation soil sample 1 are tested; The soil moisture content of described installation soil sample 1 and dry density are all identical with soil moisture content and the dry density at the burial place place of burying underground soil moisture meter.
In the present embodiment, the weight of the disturbed sample of getting is no less than 5kg.
In the present embodiment, while utilizing the disturbed sample fabrication and installation soil sample 1 of getting, take to hit sample method or pressure-like method and make.
Reality is first determined the dry density that needs fabrication and installation soil sample 1 before described installation soil sample 1 is made.The dry density of described installation soil sample 1 is determined by analogy method, specifically according to the dry density average statistics value of the soil body in the same formation of construction site, determines.During practice of construction, also can or determine the dry density that soil sample 1 is installed according to coefficient of consolidation and the maximum dry density of similar earth material according to the degree of compaction of undisturbed soil that get job site.
In the present embodiment, all the other method steps are all identical with embodiment 1.
The above; it is only preferred embodiment of the present invention; not the present invention is imposed any restrictions, every any simple modification, change and equivalent structure of above embodiment being done according to the technology of the present invention essence changes, and all still belongs in the protection domain of technical solution of the present invention.
Claims (10)
1. the boring method for embedding of a soil moisture meter, the soil moisture meter of burying underground comprises testing element (2) and the Cables for Dam Observation (6) of joining with testing element (2), described testing element (2) bottom is provided with probe (3), it is characterized in that the method comprises the following steps:
Step 1, bury hole drill underground and visit: drill through and bury hole (10) underground, bury hole (10) underground for being vertically to the boring of laying;
Step 2, soil moisture meter are buried underground, and process is as follows:
Step 201, sampling and soil sample is installed and makes: in the burial place soil sampling of burying underground soil moisture meter and make soil sample (1) is installed, described installation soil sample (1) is less than for cylindrical earth pillar and its diameter the aperture of burying hole (10) underground;
Step 202, testing element are fixed: testing element (2) the set probe in bottom (3) is inserted into soil sample (1) top is installed;
The hole backfill is transferred and buried underground to step 203, soil moisture meter: after burying hole (10) underground and being backfilled to the burial place place of burying underground soil moisture meter, the installation soil sample (1) that will be fixed with testing element (2) is transferred and is put in place, then carries out backfill to burying hole (10) underground.
2. according to the boring method for embedding of a kind of soil moisture meter claimed in claim 1, it is characterized in that: the quantity of the soil moisture meter of burying underground is a plurality of, a plurality of described soil moisture meters are laid from the bottom to top, and the method for embedding of a plurality of described soil moisture meters is all identical; In step 2, carry out the soil moisture meter while burying underground, from the bottom to top a plurality of described soil moisture score are not buried underground according to step 201 to the method described in step 203; The installation soil sample (1) that will be fixed with testing element (2) in step 203 while to burying hole (10) underground, carrying out backfill, will be buried the burial place place that hole (10) is backfilled to a described soil moisture meter underground after transferring and putting in place.
3. according to the boring method for embedding of the described a kind of soil moisture meter of claim 1 or 2, it is characterized in that: the burial place fetch earth at burying underground soil moisture meter in step 201 is undisturbed soil sample or disturbed sample;
When soil sample was undisturbed soil sample, the quantity of the undisturbed soil sample of getting was two, and two described undisturbed soil samples comprise soil sample and the soil sample for fabrication and installation soil sample (1) be used to testing soil moisture content and dry density;
When soil sample is disturbed sample, utilizes the disturbed sample fabrication and installation soil sample (1) of getting, and soil moisture content and the dry density of made installation soil sample (1) are tested; The soil moisture content of described installation soil sample (1) and dry density are all identical with soil moisture content and the dry density at the burial place place of burying underground soil moisture meter.
4. according to the boring method for embedding of the described a kind of soil moisture meter of claim 1 or 2, it is characterized in that: before in step 203, the installation soil sample (1) that is fixed with testing element (2) being transferred, first Cables for Dam Observation (6) is connected on testing element (2); While transferring, Cables for Dam Observation (6) is together transferred with testing element (2) to the installation soil sample (1) that is fixed with testing element (2); After the installation soil sample (1) that is fixed with testing element (2) is transferred and is put in place, first gently move Cables for Dam Observation (6) to bury hole (10) underground a side, again the soil ball of the location by free-falling (4) by Cables for Dam Observation (6) be extruded onto with the hole wall of burying hole (10) underground near, to burying hole (10) underground, carry out backfill afterwards.
5. according to the boring method for embedding of the described a kind of soil moisture meter of claim 1 or 2, it is characterized in that: to the installation soil sample (1) that is fixed with testing element (2), while transferring, adopt hanging apparatus to transfer in step 203; Described hanging apparatus comprises and is wrapped in the hoisting rope (9) that gauze bag (7) that soil sample (1) outside is installed and colligation are fixed on gauze bag (7) top, and hoisting rope in decentralization process (9) is coaxial laying with installation soil sample (1).
6. according to the boring method for embedding of the described a kind of soil moisture meter of claim 1 or 2, it is characterized in that: in step 203 behind the burial place place that buries hole (10) underground and be backfilled to burying underground soil moisture meter and before the installation soil sample (1) that will be fixed with testing element (2) transfers, first to the scattered seed undisturbed soil of burying underground after the interior backfill 3cm～5cm in hole (10); After the installation soil sample (1) that is fixed with testing element (2) is transferred and is put in place, again to burying hole (10) interior backfill scattered seed undisturbed soil underground so that the space of soil sample (1) being installed and bury underground between hole (10) is filled, and make testing element (2) imbed in the scattered seed undisturbed soil of institute's backfill, to burying hole (10) underground, carry out, in backfill and backfilling process, backfill (13) is carried out to compaction in layers more afterwards.
7. according to the boring method for embedding of a kind of soil moisture meter claimed in claim 3, it is characterized in that: the burial place fetch earth at burying underground soil moisture meter in step 201 is undisturbed soil sample; In step 1, drill through while burying hole (10) underground, while adopting rig to creep into burial place top 35cm to burying underground soil moisture meter～45cm from top to bottom, complete boring procedure; While in step 2, getting described undisturbed soil sample, first adopt soil sampler clear hole 15cm～25cm downwards, then adopt soil sampler successively to get the described undisturbed soil sample that two height are 15cm～20cm.
8. according to the boring method for embedding of the described a kind of soil moisture meter of claim 1 or 2, it is characterized in that: before in step 202, testing element (2) the set probe in bottom (3) being inserted into to installation soil sample (1) top, first outside soil sample (1) is installed, a protective sleeve is installed; In step 202, the set probe in testing element (2) bottom (3) is inserted into soil sample (1) top is installed after and in step 203, carry out before the soil moisture meter buries underground, the test value of testing element under current state (2) is carried out to record.
9. according to the boring method for embedding of the described a kind of soil moisture meter of claim 1 or 2, it is characterized in that: before in step 203, the installation soil sample (1) that is fixed with testing element (2) being transferred, soil sample (1) top first will be installed and cut into truncated cone; After the installation soil sample (1) that will be fixed with testing element (2) is transferred and is put in place, to burying hole (10) underground, carry out, in backfill and backfilling process, backfill (13) is carried out to compaction in layers, the density after backfill (13) compacting is not less than the density of burying all side soil bodys in hole (10) underground.
10. according to the boring method for embedding of the described a kind of soil moisture meter of claim 1 or 2, it is characterized in that: before in step 202, testing element (2) the set probe in bottom (3) being inserted into to installation soil sample (1) top, first adopt rig to drill through a plurality of installing holes that supply respectively probe (3) to install on installation soil sample (1) top, the aperture of described installing hole is that 2/3～3/4 and its hole depth of probe (3) diameter is identical with the length of probe (3).
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| CN103410136B (en) | 2015-08-26 |
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