CN103088804B - Injection method for static sounding probe rod - Google Patents

Injection method for static sounding probe rod Download PDF

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Publication number
CN103088804B
CN103088804B CN201310049510.3A CN201310049510A CN103088804B CN 103088804 B CN103088804 B CN 103088804B CN 201310049510 A CN201310049510 A CN 201310049510A CN 103088804 B CN103088804 B CN 103088804B
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feeler lever
injection
angle
static sounding
probe rod
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CN103088804A (en
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夏群
陈琛
龚渊
张银海
周年顺
沈超
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Shanghai Survey Design And Research Institute Group Co ltd
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Shanghai Geotechnical Investigations and Design Institute Co Ltd
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Abstract

The invention belongs to the field of geotechnical engineering investigation in-situ tests and particularly relates to an injection method for a static sounding probe rod. The injection method for the static sounding probe rod is characterized in that after the probe rod is injected into a static sounding hole at an angle smaller than 0.3 degree, injection is stopped every time the probe rod is injected at a center distance. The probe rod conducts clockwise rotation through a pipe wrench. Angle data of a probe is observed. When the trend that the angle data becomes small occurs, rotation and continuous injection of the probe rod is stopped when the angle data is the smallest; and when the trend that the angle data becomes large occurs, the probe rod continues to rotate along the clockwise direction and continues to be injected after returning to an original position. The injection method for the static sounding probe rod has the advantages of improving perpendicularity of the static sounding probe rod, improving the injection depth of the probe rod at one time as much as possible under restriction of permitted inclined degree of the probe rod and without adoption of traditional means of placing the guide protective sleeve downwards to improve the perpendicularity of the of the probe rod and reducing working intensity of static sounding field operation.

Description

A kind of injection method of static sounding feeler lever
Technical field
The invention belongs to geotechnical investigation in-situ test field, be specifically related to a kind of injection method of static sounding feeler lever.
Background technology
Static sounding is a kind of home position testing method conventional in geotechnical investigation, by a kind of special probe being pressed in soil, records soil layer penetration resistance, obtains the soil layer mechanics parameter that can be used for engineering design.This home position testing method is used very general in engineering investigation.But because feeler lever in injection exists gradient, the vertical curve position that the probe in injection soil layer can depart from exploratory hole center on ground causes test data can not truly reflect position, the ground static sounding index on stratum vertically downward, causes test crash.Because feeler lever slenderness ratio is very large, for guaranteeing the unlikely appearance of feeler lever injection over allowing deviant, between stipulating in the industry that at present a depth of penetration generally surpasses 30 meters to 40 meters, surpassing this degree of depth needs segmentation to take little guiding pillar afterwards, carries out repeatedly injection.This experimental working technique, labour intensity is large, time-consuming taking a lot of work.
Summary of the invention
The object of the invention is according to above-mentioned the deficiencies in the prior art, a kind of injection method of static sounding feeler lever is provided, by the verticality to feeler lever in penetration process, constantly adjust, guarantee that injection angle lapping gradient continues injection when minimum, the in the situation that of not lower guiding pillar, improve as much as possible the degree of depth of an injection.
The object of the invention realizes and being completed by following technical scheme:
A kind of injection method of static sounding feeler lever, described method relates to feeler lever, hydraulic press, and described feeler lever is connected on described hydraulic press and by it and completes injection, and described feeler lever end is provided with probe, on described probe, be connected with angular transducer, it is characterized in that: described method comprises the steps:
(a) between the injection position of described feeler lever and described hydraulic press, angle is set to be less than 0.3 °;
(b) after described feeler lever injection 2-3m, stop injection, adopt pipe wrench that described feeler lever is turned clockwise to 180 °, observe the angle-data of described probe simultaneously, while there is diminishing trend in described angle-data, position when described feeler lever is rotated to described angle-data minimum value; When described angle-data occurs becoming main trend, described feeler lever is continued to turn clockwise until original position;
(c) feeler lever of described step in a), to be less than after 0.3 ° of injection, when described feeler lever horizontal level deviation is greater than 5m, stops injection, by pillar under injection, leads.
When described feeler lever horizontal-shift is not more than certain permissible value, improve the degree of depth of an injection of feeler lever, otherwise need stop injection, by leading under injection, pillar carries out verticality control.
In the situation that the soil shallow-layer of described feeler lever injection contains miscellaneous fill, described miscellaneous fill is removed until described soil body shallow-layer is natural soil layer.
When employing pillar is pressed into the bottom of protecting described feeler lever, described feeler lever to be positioned at described pillar, angle is less than 3 °.Adopt rig to rush the method for pillar and described feeler lever gradation injection, when described feeler lever is positioned at the bottom of described pillar, angle is less than 3 °, and described feeler lever exceeds the degree of depth of continuation injection behind described pillar bottom and is not more than 20m.
Described feeler lever is arranged in pairs or groups by thickness feeler lever, and described feeler lever leading portion is thin feeler lever, and back segment is thick feeler lever.
20 meters of depths of penetration, with interior different depth multiple rotary feeler lever, make to continue again injection after the angle minimum between feeler lever and plumb line.
Described step (a) also comprises the inspection step to described feeler lever and described hydraulic press before, and described inspection step comprises the following steps:
By angle steel inner side edge, rotation limit, described feeler lever is carried out glacing flatness inspection, the bonding strength between described feeler lever and described probe is checked;
By spirit level, described hydraulic press levelness is checked;
Check the angle-data of described probe.
When described feeler lever depth of penetration is less than 10 meters, when angle-data is more than or equal to 1.5 ° described in it, pull up feeler lever injection again; Described feeler lever depth of penetration is less than 20 meters, when angle-data is more than or equal to 2.5 ° described in it, pulls up feeler lever injection again.
When described feeler lever horizontal level deviation is greater than 5 meters, stop injection, by pillar under injection, lead.Described feeler lever exceeds described pillar bottom lengths and is not more than 20 meters.
By thickness collocation apolegamy feeler lever, first about 20 meters adopt thin feeler lever, select thick feeler lever for 20 meters later.
Advantage of the present invention is: improved static sounding feeler lever verticality, can be in the feeler lever degree of skewness restriction allowing, improve as far as possible depth of penetration of feeler lever and needn't take traditional means such as lower guiding pillar to improve feeler lever verticality, reduced the working strength of static sounding field operation operation.
Accompanying drawing explanation
Fig. 1 is experimental data figure mono-of the present invention;
Fig. 2 is experimental data figure two of the present invention;
Fig. 3 is block diagram one of the present invention;
Fig. 4 is block diagram two of the present invention;
Fig. 5 is block diagram three of the present invention;
Fig. 6 is block diagram four of the present invention;
Fig. 7 is block diagram five of the present invention;
Fig. 8 is block diagram six of the present invention.
The specific embodiment
Below in conjunction with accompanying drawing, by embodiment, feature of the present invention and other correlated characteristic are described in further detail, so that technician's of the same trade understanding:
As shown in Fig. 1-8, in figure, mark 1-2 is respectively: rig 1, feeler lever 2.
Embodiment mono-: as shown in Figure 5, adopt two kinds of different feeler levers of diameter to combine, front end 20m-25m partly selects 36mm diameter feeler lever, part afterwards adopts the feeler lever of 40mm or 42mm diameter, this combined method can effectively guarantee the rigidity of feeler lever, and phenomenon can not fracture easily when injection.
Before construction starts, the glacing flatness of every feeler lever is detected, generally can pass through visual method, while feeler lever is rested on to the angle steel inner side of high straightness in the situation that required precision is high, rotate the glacing flatness of passing through visual detection feeler lever.
As shown in Figure 3, the preparation before injection: arrange the earth anchor of enough rigs 1, leveling drilling machine body makes its supporting leg fully contact with ground, adopts spirit level inspection AQL degree.Check the verticality of quiet inspecting hole, front 10m must guarantee vertically, if injection place superficial part exists miscellaneous fill, before injection, should clean out, in order to avoid the injection of feeler lever is counteracted.The wiring of popping one's head in is connected with instrument, and whether being connected between detecting feeler lever and popping one's head in be normal.As shown in Figure 4, check that probe shows that whether numerical value is normal, whether normal vertical depression probe, test the collection of Ps numerical value; Angle-data to the probe on feeler lever 2 is tested, and respectively probe is placed in to different angles, and whether test probe angle measuring function is normal.As shown in Figure 6, after feeler lever is kept flat, its reading should be guaranteed, in 90 degree left and right, to should be 0 degree left and right (being less than 0.3 degree) while putting into hydraulic press injection position, and during injection, angular error is controlled at 1 degree left and right as far as possible.
During injection, be divided into following several stages:
(1) as shown in Figure 7, after normal injection, when feeler lever injection suspends during to 2m-3m left and right, with pipe wrench, feeler lever is turned clockwise, check the variation of angle head angle data, if reduction trend appears in angle-data, when rotating to minimum value, stop, continuing injection feeler lever; If increase tendency appears in angle-data, continue to be rotated in a clockwise direction feeler lever is gone back to original position.
(2) feeler lever injection stops injection to 5 meters of of underground, probe is carried out to temperature and waft and the zero calibration of wafing.
(3) when feeler lever injection suspends during to 7m-8m left and right, the action of doing in repeating step (1).
(4) when feeler lever injection is to 10 meters of undergrounds, if head angle data show, be greater than 1.5 degree, feeler lever is extracted to injection again after cleaning; Probe injection during to 20 meters of undergrounds, is greater than 2.5 degree if head angle data show, feeler lever is extracted to injection again after cleaning.
(5) in feeler lever penetration process, once find that the probe horizontal-shift distance on feeler lever top surpasses in the situation of 5m, stop injection, adopt the method for lower pillar guiding that feeler lever is corrected back to the position in angular deviation allowed band.
(6) feeler lever injection is to bottom, and experiment completes, disposal data.
When feeler lever injection is during to hard formation and more closely knit layer of sand, slow down penetrating speed, earth anchor is tightened, keep the variation of level and the head angle data of fuselage as far as possible, slowly enter.
At probe, when entering better soil layer compared with soft layer, should control penetrating speed (injection at a slow speed); At probe, enter in better soil layer aspect 3m, at least 0.5m back to zero once.Should notice whether earth anchor exists pulls up simultaneously, in time leveling rig.
Embodiment bis-: the method for the present embodiment is basic identical with embodiment mono-, and differential point is to adopt the pillar of 15-20m to be pressed into protection feeler lever, are applicable to test area and exist Soft Soil Layer and depth of penetration for example to have relatively high expectations, in the situation of (being greater than 60m).
The experimental data in 59 holes of the method for operating that as shown in Figure 1, 2, Fig. 1 is employing the present embodiment in the project of outskirts park, Chongming, Shanghai City; Fig. 2, for adopting the experimental data that operates in 119 holes in Chinese fair exhibitions synthesis project (northern piece) of the present embodiment, can obviously learn by two figure, the present invention during to feeler lever injection gradient there is the effect significantly reducing, improve test Success Ratio.

Claims (8)

1. the injection method of a static sounding feeler lever, described method relates to feeler lever, hydraulic press, described feeler lever is connected on described hydraulic press and by it and completes injection, described feeler lever end is provided with probe, on described probe, be connected with angular transducer, it is characterized in that: described method comprises the steps:
(a) between the injection position of described feeler lever and described hydraulic press, angle is set to be less than 0.3 °;
(b) after described feeler lever injection certain distance, stop injection, adopt pipe wrench that described feeler lever is turned clockwise to 180 °, observe the angle-data of described probe simultaneously, while there is diminishing trend in described angle-data, position when described feeler lever is rotated to described angle-data minimum value; When described angle-data occurs becoming main trend, described feeler lever is continued to turn clockwise until original position;
(c) feeler lever in described step (a), to be less than after 0.3 ° of injection, when described feeler lever horizontal level deviation is greater than 5m, stops injection, by pillar under injection, leads.
2. the injection method of a kind of static sounding feeler lever according to claim 1, is characterized in that: in the situation that the soil shallow-layer of described feeler lever injection contains miscellaneous fill, described miscellaneous fill is removed until described soil body shallow-layer is natural soil layer.
3. the injection method of a kind of static sounding feeler lever according to claim 1, is characterized in that: when employing pillar is pressed into the bottom of protecting described feeler lever, described feeler lever to be positioned at described pillar, angle is less than 3 °.
4. the injection method of a kind of static sounding feeler lever according to claim 1, it is characterized in that: adopt rig to rush the method for pillar and described feeler lever gradation injection, when described feeler lever is positioned at the bottom of described pillar, angle is less than 3 °, and described feeler lever exceeds the degree of depth that continues injection behind described pillar bottom and is not more than 20m.
5. the injection method of a kind of static sounding feeler lever according to claim 1, is characterized in that: 20 meters of depths of penetration, with interior different depth multiple rotary feeler lever, make to continue injection after the angle minimum between feeler lever and plumb line again.
6. the injection method of a kind of static sounding feeler lever according to claim 1, is characterized in that: described feeler lever is arranged in pairs or groups by thickness feeler lever, and described feeler lever leading portion is thin feeler lever, and back segment is thick feeler lever.
7. the injection method of a kind of static sounding feeler lever according to claim 1, is characterized in that: described step (a) also comprises the inspection step to described feeler lever and described hydraulic press before, and described inspection step comprises the following steps:
By angle steel inner side edge, rotation limit, described feeler lever is carried out glacing flatness inspection, the bonding strength between described feeler lever and described probe is checked;
By spirit level, described hydraulic press levelness is checked;
Check the angle-data of described probe.
8. the injection method of a kind of static sounding feeler lever according to claim 1, is characterized in that: when described feeler lever depth of penetration is less than 10 meters, when angle-data is more than or equal to 1.5 ° described in it, pull up feeler lever injection again; Described feeler lever depth of penetration is less than 20 meters, when angle-data is more than or equal to 2.5 ° described in it, pulls up feeler lever injection again.
CN201310049510.3A 2013-02-07 2013-02-07 Injection method for static sounding probe rod Active CN103088804B (en)

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CN103471644B (en) * 2013-09-13 2016-02-10 爱德森(厦门)电子有限公司 A kind of memory material that adopts is to the device and method of the accurate detection and localization of complex object
CN105155500A (en) * 2015-08-03 2015-12-16 河海大学 Rotation type static sounding detecting method for cement mixing pile
CN109056688B (en) * 2018-09-04 2023-10-24 武汉吉欧信海洋科技股份有限公司 Underwater continuous penetration static sounding device
CN109555099B (en) * 2019-01-07 2023-12-15 大连理工大学 Novel ocean soil full-current sounding system and testing method
CN109655001A (en) * 2019-02-03 2019-04-19 南京吉欧地下空间科技有限公司 A kind of device and its application method of the lateral displacement of the in-situ monitoring soil body
CN111139812B (en) * 2019-12-30 2021-07-06 山东建大工程鉴定加固研究院 Static sounding device and method for geotechnical geological exploration
CN111829870B (en) * 2020-07-09 2021-05-18 广州海洋地质调查局 Static sounding testing device in sampling pipe
CN112735508A (en) * 2020-11-25 2021-04-30 中国电建集团中南勘测设计研究院有限公司 Clamping and rotating device and method for inclination adjustment of probe rod
CN113846616B (en) * 2021-08-30 2023-06-09 中建华宸(海南)建设集团有限公司 Platform type ocean static sounding device

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Patent Citations (6)

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Publication number Priority date Publication date Assignee Title
DE102007028886A1 (en) * 2007-06-20 2008-12-24 Rwe Power Ag Mobile ram probe device for soil analysis, has probe support, stroke device for recovering probe support, probe rod for guiding stroke device and units for pulling probe support
CN102031771A (en) * 2009-09-25 2011-04-27 铁道第三勘察设计院集团有限公司 Deep static cone penetration test method for geotechnical engineering
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