CN103526782A - Method for monitoring horizontal displacement of underground continuous wall body - Google Patents

Method for monitoring horizontal displacement of underground continuous wall body Download PDF

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CN103526782A
CN103526782A CN201310447112.7A CN201310447112A CN103526782A CN 103526782 A CN103526782 A CN 103526782A CN 201310447112 A CN201310447112 A CN 201310447112A CN 103526782 A CN103526782 A CN 103526782A
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value
wall
horizontal displacement
wall body
measure
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CN103526782B (en
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李乐
郭凯
崔爱珍
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China Construction Eighth Engineering Division Co Ltd
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China Construction Eighth Engineering Division Co Ltd
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Abstract

The invention provides a method for monitoring horizontal displacement of an underground continuous wall body. The method comprises the steps of pouring a concrete protection platform around an embedded PVC inclinometer casing of an underground continuous wall and setting a correction point on the top face of the concrete protection platform; using the PVC inclinometer casing and an inclinometer to measure a horizontal displacement initial value X0 of the underground continuous wall body before foundation pit excavation and using a theodolite to measure a horizontal displacement initial value Y0 of the correction point; using the PVC inclinometer casing and an inclinometer to measure horizontal displacement values at different depths of the underground continuous wall body and a wall body horizontal displacement value X(i) in the construction process, and using the theodolite to measure a horizontal displacement value Y(i) of the correction point, wherein the superscript I represents for measuring times, and an obtained wall body horizontal displacement correction value P(i)=(Y(i)-Y0)- (X(i)-X0); S5, using the wall body horizontal displacement correction value P(i) to correct the wall body horizontal displacement value X(i) and the horizontal displacement values at different depths of the wall body, wherein the corrected wall body horizontal displacement value and the corrected horizontal displacement values at different depths of the wall body are shown as formulas.

Description

Diaphragm wall body of wall horizontal displacement monitoring method
Technical field
The present invention relates to a kind of building construction measurement method, espespecially a kind of diaphragm wall body of wall horizontal displacement monitoring method.
Background technology
Present stage must be carried out deformation observation of maintenance structure to diaphragm wall in deep foundation pit construction, in this monitoring project, using commonplace technology is at present that then pre-buried PVC inclinometer pipe is used inclinometer to carry out lateral wall deflection monitoring to it in diaphragm wall, the degree of depth of the pre-buried PVC inclinometer pipe of General Requirements should be goed deep into diaphragm wall bottom, but in practice of construction due to pvc pipe seam imprecision, the situations such as late protection is not in place, thereby causing the inner generation of pre-buried PVC inclinometer pipe to be stopped up causes clinometer probe cannot transfer to the design basis degree of depth, and inclinometer operating principle is to take the design basis degree of depth as the reference point cumulative body of wall structural strain's curve that finally obtains of segmentation deviational survey then, reference point shoals and causes monitored data in cumulative process to occur globality deviation.
Summary of the invention
The object of the invention is to overcome the limitation of prior art, and a kind of diaphragm wall body of wall horizontal displacement monitoring method is provided, it can just more accurately measure the horizontal movement of diaphragm wall body of wall.
In order to achieve the above object, technical way of the present invention is: a kind of diaphragm wall body of wall horizontal displacement monitoring method is provided, comprise the following steps: S1: at the surrounding concreting protection platform of the pre-buried PVC inclinometer pipe of diaphragm wall, at the end face of concrete protective platform, adjusting point is set; S2: use PVC inclinometer pipe and inclinometer to measure at diaphragm wall body of wall horizontal movement initial value X before excavation of foundation pit 0, use transit survey adjusting point horizontal movement initial value Y 0; S3: use PVC inclinometer pipe and inclinometer to measure the horizontal movement value at diaphragm wall body of wall different depth in work progress
Figure BDA0000388465070000011
with lateral wall deflection value X (i), use transit survey adjusting point horizontal movement value Y (i), wherein subscript i represents to measure number of times, and subscript h represents the degree of depth of survey data measured place; S4: try to achieve lateral wall deflection correction value P (i)=(Y (i)-Y 0)-(X (i)-X 0); S5: use lateral wall deflection correction value P (i)revise lateral wall deflection value X (i)horizontal movement value with body of wall different depth
Figure BDA0000388465070000012
revised lateral wall deflection value wherein the horizontal movement value of revised body of wall different depth
Figure BDA0000388465070000021
wherein subscript p represents revised value.The benefit of this measuring method is effectively to solve because PVC inclinometer pipe stops up on reference point moves the problem that causes monitoring data deviation, thereby has greatly improved the precision of space enclosing structure diaphragm wall body of wall horizontal displacement monitoring.
Further improvement of the present invention is: use PVC inclinometer pipe and inclinometer to measure lateral wall deflection initial value value X 0further comprising the steps: to use PVC inclinometer pipe and inclinometer to measure the horizontal movement initial value at diaphragm wall body of wall different depth
Figure BDA0000388465070000022
horizontal movement initial value to different depth
Figure BDA0000388465070000023
data acquisition by interpolation method, obtain the horizontal displacement Z of concrete protective countertop 0, by Z 0as lateral wall deflection initial value X 0.Improvement can be avoided because the lateral wall deflection value X that PVC inclinometer pipe top causes to the vertical distance of concrete protective countertop like this 0measure error.
Further improvement of the present invention is: in work progress, use PVC inclinometer pipe and inclinometer to measure lateral wall deflection value X (i)further comprising the steps: to use PVC inclinometer pipe and inclinometer to measure the horizontal movement value at diaphragm wall body of wall different depth
Figure BDA0000388465070000024
horizontal movement value to different depth
Figure BDA0000388465070000025
data acquisition by interpolation method, obtain the horizontal displacement Z of concrete protective countertop (i), by Z (i)as lateral wall deflection value X (i).
Further improvement of the present invention is: underground continuous wall body bottom is goed deep in the lower end of PVC inclinometer pipe, and the upper end of PVC inclinometer pipe exceeds underground continuous wall top.
Accompanying drawing explanation
Fig. 1 is view when diaphragm wall body of wall is not out of shape in diaphragm wall body of wall horizontal displacement monitoring method of the present invention;
Fig. 2 is the comparison diagram before diaphragm wall deformation of wall and after distortion in diaphragm wall body of wall horizontal displacement monitoring method of the present invention.
The specific embodiment
Below in conjunction with accompanying drawing, embodiments of the invention are described in detail.
With reference to figure 1, while making the reinforcing cage of diaphragm wall 1 by 2 colligations of PVC inclinometer pipe in reinforcing cage, the lower end of PVC inclinometer pipe 2 gos deep into body of wall bottom and upper end exceeds wall top.Treat that after-pouring concrete forms diaphragm wall 1 and pre-buried PVC inclinometer pipe 2, the type selecting of PVC inclinometer pipe 2, colligation quality and joint sealing are processed should meet " architecture Foundation Pit Engineering Specifications of Monitoring Technology " requirement (GB50497-2009).。Wall at pre-buried PVC inclinometer pipe 2 peripheries pushes up the PVC inclinometer pipe concrete protective platform 4 of implanting reinforcing bar and building 500 * 500 * 500mm; bar planting is carried out about the related request of bar planting in (GB50367-2006) according to " concrete structure reinforcement design specifications ", at the end face of walls concrete protection platform 4, adjusting point 5 is set according to " Code for engineering surveying " requirement (GB50026-2007) simultaneously.
With reference to figure 1, the lateral wall deflection initial value X0 that uses PVC inclinometer pipe 2 and inclinometer to measure at diaphragm wall 1 before foundation ditch 3 excavations, is used transit survey adjusting point 5 horizontal movement initial value Y0.Because adjusting point 5 is positioned at the end face of concrete protective platform 4; its top to PVC inclinometer pipe 2 has certain altitude poor, so the data that PVC inclinometer pipe 2 and inclinometer are measured need to be revised and just can draw diaphragm wall 1 lateral wall deflection initial value X accurately the horizontal movement in this difference in height 0.Use PVC inclinometer pipe 2 and inclinometer to measure lateral wall deflection initial value value X 0further comprising the steps: to use PVC inclinometer pipe 2 and inclinometer to measure the horizontal movement initial value at the body of wall different depth of diaphragm wall 1
Figure BDA0000388465070000031
horizontal movement initial value to different depth
Figure BDA0000388465070000032
data acquisition by interpolation method, obtain the horizontal displacement Z of the end face of concrete protective platform 4 0, by Z 0as lateral wall deflection initial value X 0.
With reference to figure 2, in work progress, use PVC inclinometer pipe 2 and inclinometer to measure the horizontal movement value at diaphragm wall 1 body of wall different depth
Figure BDA0000388465070000033
with lateral wall deflection value X (i), wherein use PVC inclinometer pipe and inclinometer to measure lateral wall deflection value X (i)further comprising the steps: to use PVC inclinometer pipe and inclinometer to measure the horizontal movement value at diaphragm wall body of wall different depth
Figure BDA0000388465070000034
horizontal movement value to different depth
Figure BDA0000388465070000035
data acquisition by interpolation method, obtain the horizontal displacement Z of concrete protective countertop (i), by Z (i)as lateral wall deflection value X (i).When measuring lateral wall deflection value X (i), use transit survey adjusting point horizontal movement value Y (i), wherein subscript i represents to measure number of times, and subscript h represents the degree of depth of survey data measured place; Utilization is tried to achieve data and is obtained lateral wall deflection correction value P (i)=(Y (i)-Y 0)-(X (i)-X 0);
If in work progress, PVC inclinometer pipe is to stop up point 6 places blocked with reference to figure 2, the more than 6 lateral wall deflection data of the obstruction point that PVC inclinometer pipe 2 and inclinometer can only be measured PVC inclinometer pipe 2 so, can give and measure the globality deviation that introducing is very large like this.In order to address this problem, can use lateral wall deflection correction value P (i)revise lateral wall deflection value X (i)horizontal movement value with body of wall different depth
Figure BDA0000388465070000036
revised lateral wall deflection value wherein
Figure BDA0000388465070000037
the horizontal movement value of revised body of wall different depth
Figure BDA0000388465070000038
wherein subscript p represents revised value.After correction, can stop up a little more than 6 lateral wall deflection value.The benefit of this measuring method be effectively to solve because PVC inclinometer pipe stops up on reference point and move the problem that causes monitoring data deviation, thereby greatly improved the precision of space enclosing structure diaphragm wall body of wall horizontal displacement monitoring.
The above is only preferred embodiment of the present invention, not the present invention is done to any pro forma restriction, although the present invention discloses as above with preferred embodiment, yet not in order to limit the present invention, any those skilled in the art, within not departing from the scope of technical solution of the present invention, when can utilizing the technology contents of above-mentioned announcement to make a little change or being modified to the equivalent embodiment of equivalent variations, in every case be the content that does not depart from technical solution of the present invention, any simple modification of above embodiment being done according to technical spirit of the present invention, equivalent variations and modification, all still belong in the scope of technical solution of the present invention.

Claims (4)

1. a diaphragm wall body of wall horizontal displacement monitoring method, is characterized in that the method comprises the following steps:
S1: at the surrounding concreting protection platform of the pre-buried PVC inclinometer pipe of diaphragm wall, at the end face of concrete protective platform, adjusting point is set;
S2: use PVC inclinometer pipe and inclinometer to measure at diaphragm wall body of wall horizontal movement initial value X before excavation of foundation pit 0, use transit survey adjusting point horizontal movement initial value Y 0;
S3: use PVC inclinometer pipe and inclinometer to measure the horizontal movement value at diaphragm wall body of wall different depth in work progress with lateral wall deflection value X (i), use transit survey adjusting point horizontal movement value Y (i), wherein subscript i represents to measure number of times, and subscript h represents the degree of depth of survey data measured place;
S4: try to achieve lateral wall deflection correction value P (i)=(Y (i)-Y 0)-(X (i)-X 0);
S5: use lateral wall deflection correction value P (i)revise lateral wall deflection value X (i)horizontal movement value with body of wall different depth
Figure FDA0000388465060000012
revised lateral wall deflection value wherein
Figure FDA0000388465060000013
the horizontal movement value of revised body of wall different depth
Figure FDA0000388465060000014
wherein subscript p represents revised value.
2. diaphragm wall body of wall horizontal displacement monitoring method as claimed in claim 1, is characterized in that: use PVC inclinometer pipe and inclinometer to measure lateral wall deflection initial value value X 0further comprising the steps:
Use PVC inclinometer pipe and inclinometer to measure the horizontal movement initial value at diaphragm wall body of wall different depth
Figure FDA0000388465060000015
Horizontal movement initial value to different depth
Figure FDA0000388465060000016
data acquisition by interpolation method, obtain the horizontal displacement Z of concrete protective countertop 0, by Z 0as lateral wall deflection initial value X 0.
3. diaphragm wall body of wall horizontal displacement monitoring method as claimed in claim 1, is characterized in that: in work progress, use PVC inclinometer pipe and inclinometer to measure lateral wall deflection value X (i)further comprising the steps:
Use PVC inclinometer pipe and inclinometer to measure the horizontal movement value at diaphragm wall body of wall different depth
Figure FDA0000388465060000017
Horizontal movement value to different depth
Figure FDA0000388465060000018
data acquisition by interpolation method, obtain the horizontal displacement Z of concrete protective countertop (i), by Z (i)as lateral wall deflection value X (i).
4. diaphragm wall body of wall horizontal displacement monitoring method as claimed in claim 1, is characterized in that: underground continuous wall body bottom is goed deep in the lower end of described PVC inclinometer pipe, and the upper end of PVC inclinometer pipe exceeds underground continuous wall top.
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103761400A (en) * 2014-01-28 2014-04-30 浙江省建筑设计研究院 Method for calculating underground continuous wall with supporting legs under action of horizontal loads
CN103882848A (en) * 2014-03-19 2014-06-25 刘晓宇 High-strength double-wall inclinometer casing for inclined displacement measurement
CN105446276A (en) * 2014-08-15 2016-03-30 上海骋浩机械有限公司 Foundation pit axial force monitoring compensation method
CN105696600A (en) * 2015-05-26 2016-06-22 中铁十六局集团北京轨道交通工程建设有限公司 Foundation pit supporting method capable of automatically controlling horizontal displacement of underground diaphragm wall

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CN102787616A (en) * 2012-07-11 2012-11-21 中国建筑第六工程局有限公司 Burying method of inclination measuring pipes in soil body
CN103046523A (en) * 2012-12-25 2013-04-17 北京爱地地质勘察基础工程公司 Method for monitoring horizontal deformation of foundation pit and slope support

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CN102787616A (en) * 2012-07-11 2012-11-21 中国建筑第六工程局有限公司 Burying method of inclination measuring pipes in soil body
CN103046523A (en) * 2012-12-25 2013-04-17 北京爱地地质勘察基础工程公司 Method for monitoring horizontal deformation of foundation pit and slope support

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103761400A (en) * 2014-01-28 2014-04-30 浙江省建筑设计研究院 Method for calculating underground continuous wall with supporting legs under action of horizontal loads
CN103761400B (en) * 2014-01-28 2016-08-17 浙江省建筑设计研究院 Band supporting leg diaphram wall computational methods under horizontal loads
CN103882848A (en) * 2014-03-19 2014-06-25 刘晓宇 High-strength double-wall inclinometer casing for inclined displacement measurement
CN103882848B (en) * 2014-03-19 2016-06-22 刘晓宇 A kind of high intensity double-walled inclinometer pipe measured for tilt displacement
CN105446276A (en) * 2014-08-15 2016-03-30 上海骋浩机械有限公司 Foundation pit axial force monitoring compensation method
CN105446276B (en) * 2014-08-15 2018-03-23 上海骋浩机械有限公司 A kind of foundation ditch axle power monitors compensation method
CN105696600A (en) * 2015-05-26 2016-06-22 中铁十六局集团北京轨道交通工程建设有限公司 Foundation pit supporting method capable of automatically controlling horizontal displacement of underground diaphragm wall

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