CN117166547A - Foundation pit construction measurement method - Google Patents
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- 238000010276 construction Methods 0.000 title claims abstract description 119
- 238000000691 measurement method Methods 0.000 title claims abstract description 26
- 238000005259 measurement Methods 0.000 claims abstract description 101
- 238000013461 design Methods 0.000 claims abstract description 24
- 238000009412 basement excavation Methods 0.000 claims description 26
- 238000000034 method Methods 0.000 claims description 25
- 238000013102 re-test Methods 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 238000007689 inspection Methods 0.000 claims description 3
- 239000003973 paint Substances 0.000 claims description 3
- 239000007921 spray Substances 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 230000008014 freezing Effects 0.000 description 10
- 238000007710 freezing Methods 0.000 description 10
- 230000000694 effects Effects 0.000 description 5
- 238000012544 monitoring process Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
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- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
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- 230000009189 diving Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
Abstract
The application discloses a foundation pit construction measurement method. The foundation pit construction measurement method comprises the steps of measuring and arranging a plane control network on a site to be constructed; carrying out construction measurement on the foundation pit supporting piles by taking a plane control network as a basis; after the measurement is finished, performing foundation pit support pile construction according to the construction measurement result of the foundation pit support pile; the principle that the whole is firstly followed and then the part is firstly used, the low precision is controlled with high precision is adopted, and the precision is easy to meet the requirements of design and specification. The application solves the technical problem that the precision is difficult to meet the requirements of design and specification because the supporting construction method does not follow the principle of integral and local first and the low precision is controlled with high precision.
Description
Technical Field
The application relates to the field of foundation pit construction, in particular to a foundation pit construction measurement method.
Background
In the prior art, the application patent with the publication number of CN114737574A discloses a foundation pit intelligent support pile system based on a freezing construction method, and specifically discloses a system comprising a freezing pile, a support monitoring group, a support regulation group and connection components, wherein the support monitoring group consists of measuring instruments for monitoring the water level and deformation of a foundation pit and the formation thickness of frozen soil; the support regulation and control group consists of a freezing intelligent control computer end, a freezing station and hydraulic equipment, wherein the freezing station and the hydraulic equipment are connected with the freezing pile through the connecting component, and the intelligent control computer end can intelligently regulate and control the freezing station and the hydraulic equipment based on monitoring data and adjust the freezing power and the hydraulic strength of the freezing pile; the size of the row piles is reduced, the material consumption and the construction amount are reduced, the effect of green and economical is achieved, when the diving layer is thicker, the row piles need to be driven longer, the length of the row piles can be greatly shortened by adopting a freezing method, and the effect of shortening the construction amount of the row piles is achieved.
Aiming at the problem that the supporting construction method in the related technology does not follow the principle of integral and local at first and high-precision control and low-precision, the precision is difficult to meet the requirements of design and specification, and no effective solution is proposed at present.
Disclosure of Invention
The application mainly aims to provide a foundation pit construction measurement method for solving the problem that the accuracy is difficult to meet the requirements of design and specification due to the principle that the whole construction method is not followed and then the part is not followed, and the low accuracy is controlled with high accuracy.
In order to achieve the above object, according to one aspect of the present application, there is provided a foundation pit construction measurement method.
The foundation pit construction measurement method comprises the following steps: measuring and arranging a plane control network on a site to be constructed; carrying out construction measurement on the foundation pit supporting piles by taking a plane control network as a basis; and after the measurement is finished, performing foundation pit support pile construction according to the construction measurement result of the foundation pit support pile.
Further, after the plane control network is distributed, measuring and distributing a height control network on a to-be-constructed site; after the foundation pit supporting pile is constructed, carrying out construction measurement on excavation of the earthwork of the foundation pit by taking a height control network as a basis; and after the measurement is finished, carrying out foundation pit earth excavation construction according to the construction measurement result of the foundation pit earth excavation.
Further, before the plane control network is measured and laid on the construction site, the method further comprises the following steps: the construction unit pile extension protects the crossed measurement pile points and organizes retesting; the retest result report is submitted to a supervision unit, a design unit and an owner for retesting; and if the accuracy of the wire network and the accuracy of the Gao Chengwang can meet the technical requirements in engineering measurement standards, marking and protecting the measurement pile points and guiding and measuring.
Further, measuring and laying out the planar control network at the site to be constructed includes: according to the standard requirement, plane encryption control wire points are laid on site on the basis of qualified precise wire points delivered by a consignment unit; and (3) observing and calculating coordinates of the station without stations by adopting a rear intersection method and looking back 2-3 wire points at each corner of the foundation pit.
Further, measuring and laying out the elevation control network at the site to be constructed comprises: arranging 5 leveling points on the basis of the checked qualified site leveling base points, and forming an additional leveling line by all the leveling points to carry out second-order additional leveling measurement; and adopting four leveling measurement standards specified by technical standards of engineering measurement standards to add the leveling points.
Further, when construction measurement is carried out on foundation pit support piles and foundation pit earth excavation, constant-precision observation is maintained; calculating and recording to meet the working requirements; collecting and sorting measurement technical data; a direction observation method is adopted to observe a horizontal angle, and a round trip measurement method is adopted to measure the side length; wherein the horizontal distance between the forward measurement and the backward measurement is worse and is not more than 3mm.
Further, after the measurement is completed, the result of the construction measurement is checked according to the checking criteria.
Further, the construction measurement of the foundation pit supporting pile based on the plane control network comprises the following steps: calculating center coordinates of two end point support piles of each straight line segment according to the design drawing, and measuring a first pile position of the end point support pile by using a method of polar coordinates by using on-site control wire guide points; and positioning a second pile position of the non-end point support pile according to the distance between the non-end point support pile and the end point support pile.
Further, the construction measurement for excavating the earthwork of the foundation pit by taking the elevation control network as a basis comprises the following steps: during construction, measuring elevation around the foundation pit by using a water level instrument to determine the excavation depth; when the foundation pit is excavated, due to layered construction, the elevation is timely guided into the foundation pit; and when the foundation pit is excavated to the layered design bottom elevation, the layered bottom elevation is measured in time so as to guide the mechanical excavation.
Further, the construction measurement for excavating the earthwork of the foundation pit by taking the elevation control network as a basis further comprises: after the foundation pit earthwork is excavated to the anchor rod construction working face, the anchor rod construction elevation is measured by a level meter, and the anchor rod construction elevation is marked on the anchor spray steel bar by adopting red paint.
In the embodiment of the application, a foundation pit construction measurement mode is adopted, and a plane control network is measured and laid on a site to be constructed; carrying out construction measurement on the foundation pit supporting piles by taking a plane control network as a basis; after the measurement is finished, performing foundation pit support pile construction according to the construction measurement result of the foundation pit support pile; the method achieves the aim of following the principle of firstly integrating and then locally controlling low precision with high precision, thereby realizing the technical effect that the precision is easy to meet the requirements of design and specification, and further solving the technical problem that the precision is difficult to meet the requirements of design and specification because the supporting construction method does not follow the principle of firstly integrating and then locally controlling low precision with high precision.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application, are incorporated in and constitute a part of this specification. The drawings and their description are illustrative of the application and are not to be construed as unduly limiting the application. In the drawings:
FIG. 1 is a flow chart of a foundation pit construction measurement method according to an embodiment of the present application;
FIG. 2 is a schematic diagram of a planar control network according to an embodiment of the present application;
FIG. 3 is a schematic diagram of an elevation control network according to an embodiment of the present application;
fig. 4 is a foundation pit leveling point layout according to an embodiment of the present application.
Detailed Description
In order that those skilled in the art will better understand the present application, a technical solution in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present application without making any inventive effort, shall fall within the scope of the present application.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate in order to describe the embodiments of the application herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
In the present application, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate an azimuth or a positional relationship based on that shown in the drawings. These terms are only used to better describe the present application and its embodiments and are not intended to limit the scope of the indicated devices, elements or components to the particular orientations or to configure and operate in the particular orientations.
Also, some of the terms described above may be used to indicate other meanings in addition to orientation or positional relationships, for example, the term "upper" may also be used to indicate some sort of attachment or connection in some cases. The specific meaning of these terms in the present application will be understood by those of ordinary skill in the art according to the specific circumstances.
Furthermore, the terms "mounted," "configured," "provided," "connected," "coupled," and "sleeved" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; may be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements, or components. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.
It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other. The application will be described in detail below with reference to the drawings in connection with embodiments.
Referring to fig. 1 and 2, the present application relates to a foundation pit construction measurement method including the steps of:
s101, measuring and arranging a plane control network on a to-be-constructed site;
in this embodiment, the to-be-constructed site measurement may be performed with reference to the precise wire mesh point delivered by the commission unit, and a plane control network may be laid; or the construction site measurement to be performed based on drawing the precise wire mesh points by constructors and the plane control network is laid.
Preferably, measuring and laying out the planar control network at the site to be constructed includes:
according to the standard requirement, plane encryption control wire points are laid on site on the basis of qualified precise wire points delivered by a consignment unit;
and (3) observing and calculating coordinates of the station without stations by adopting a rear intersection method and looking back 2-3 wire points at each corner of the foundation pit.
The planar encryption control wire points are laid on site on the basis of the delivered qualified precise wire points, so that the reduced drawing time can be used for laying, and the on-site laying time of the encryption control wire points is effectively shortened. In addition, in this embodiment, a rear intersection method is further adopted, 2-3 wire points are viewed from the rear at each corner of the foundation pit, and coordinates of the station (namely, rear intersection points) are observed and calculated, so that the precision of the laid planar encryption control wire points can be improved.
It should be appreciated that the rear intersection may be determined temporarily based on specific payoff requirements.
Therefore, the integral layout of the high-precision plane control network is realized, and technical support is provided for the subsequent construction measurement and control of the support pile.
S102, performing construction measurement on foundation pit supporting piles by taking a plane control network as a basis;
after the construction personnel lays the plane control network on the construction site, the construction measurement can be carried out on the foundation pit support pile according to the plane control network.
Specifically, the construction measurement of the foundation pit support pile based on the plane control network comprises the following steps:
calculating center coordinates of two end point support piles of each straight line segment according to the design drawing, and measuring a first pile position of the end point support pile by using a method of polar coordinates by using on-site control wire guide points;
and positioning a second pile position of the non-end point support pile according to the distance between the non-end point support pile and the end point support pile.
And calculating the center coordinates of the two end point support piles of each straight line segment according to the design drawing, and measuring the pile positions of the end point support piles by using a method of polar coordinates (distance and angle) by using on-site control wire points, wherein after the pile positions are measured, the control points in the plane control network are replaced for detection. The rest of the pile positions are positioned according to the distance between the supporting piles and the end point supporting piles. Therefore, the construction measurement and control can be performed locally after the plane control network is arranged wholly, and the high-precision plane control network is used for controlling the low-precision construction measurement and control.
In this embodiment, the pile level is tested using a total station and a track rod. And secondly, positioning by adopting a satellite positioning RTK mode, and performing differential positioning by adopting a thousands of search networks as data chains, wherein the plane precision reaches +/-8 mm. The positioning and control precision of the support pile can be effectively improved.
And S103, after the measurement is finished, performing foundation pit support pile construction according to the construction measurement result of the foundation pit support pile.
Performing support pile enclosure construction according to the determined pile position of the support pile; and the construction can be carried out according to the construction method of the support pile enclosure by lime marking at each measured pile position.
From the above description, it can be seen that the following technical effects are achieved:
in the embodiment of the application, a foundation pit construction measurement mode is adopted, and a plane control network is measured and laid on a site to be constructed; carrying out construction measurement on the foundation pit supporting piles by taking a plane control network as a basis; after the measurement is finished, performing foundation pit support pile construction according to the construction measurement result of the foundation pit support pile; the method achieves the aim of following the principle of firstly integrating and then locally controlling low precision with high precision, thereby realizing the technical effect that the precision is easy to meet the requirements of design and specification, and further solving the technical problem that the precision is difficult to meet the requirements of design and specification because the supporting construction method does not follow the principle of firstly integrating and then locally controlling low precision with high precision.
According to the embodiment of the application, preferably, as shown in fig. 3, after the planar control network is laid, a height control network is measured and laid on a construction site;
after the foundation pit supporting pile is constructed, carrying out construction measurement on excavation of the earthwork of the foundation pit by taking a height control network as a basis;
and after the measurement is finished, carrying out foundation pit earth excavation construction according to the construction measurement result of the foundation pit earth excavation.
In this embodiment, the method may refer to the arrangement of the site level base points qualified through rechecking to perform the site measurement to be constructed and arrange a height control network; and the construction site measurement to be performed based on the drawing of the level base point by constructors and the layout of the elevation control network can also be performed.
Preferably, measuring and laying out the elevation control network at the site to be constructed comprises:
arranging 5 leveling points on the basis of the checked qualified site leveling base points, and forming an additional leveling line by all the leveling points to carry out second-order additional leveling measurement;
and adopting four leveling measurement standards specified by technical standards of engineering measurement standards to add the leveling points.
5 leveling points are arranged on the basis of the checked qualified field leveling base points, all the leveling points form an attached leveling line to carry out second-class attachment and leveling measurement, the reduced drawing time can be used for layout, and the field layout time of the leveling points is effectively shortened. Because the requirement of the working level control point is higher, the requirement is met; the leveling point is additionally provided with four leveling standards specified by technical standards of engineering measurement, the additional measurement is adopted, the limit difference of the level land is 20L mm, and the leveling instrument is adopted for one time; the leveling rod is a double-sided rod, so that the precision of the distributed elevation control network points can be improved.
Therefore, the integral layout of the high-precision elevation control network is realized, and technical support is provided for subsequent foundation pit construction measurement and control.
According to an embodiment of the present application, preferably, as shown in fig. 4, performing construction measurement on excavation of earth of a foundation pit based on an elevation control network includes:
during construction, measuring elevation around the foundation pit by using a water level instrument to determine the excavation depth;
when the foundation pit is excavated, due to layered construction, the elevation is timely guided into the foundation pit;
and when the foundation pit is excavated to the layered design bottom elevation, the layered bottom elevation is measured in time so as to guide the mechanical excavation.
The construction measurement of the foundation pit excavation is elevation measurement because the supporting piles are constructed completely during the foundation pit earthwork excavation.
And during construction, measuring elevation around the foundation pit by using a water level instrument so as to determine the excavation depth. When the foundation pit is excavated, due to layered construction, the elevation is timely led into the foundation pit (the elevation points are arranged on the side slope of the foundation pit). And when the foundation pit is excavated to the layered design bottom elevation, the layered bottom elevation is measured in time so as to guide the mechanical excavation. The measured elevation of the layered bottom does not exceed the design value by 20-30cm. Therefore, the construction measurement and control can be performed locally after the elevation control network is arranged integrally, and the construction measurement and control with low precision can be controlled by using the high-precision elevation control network.
And each layer above the bottom layer adopts a satellite positioning RTK mode to carry out elevation control, adopts a thousands of search networks as data chains to carry out differential positioning, and has the elevation precision reaching +/-25 mm. When the foundation pit is excavated to the bottom layer, the elevation is controlled by a level gauge, a square grid of 10m multiplied by 10m is tested, and the node elevation value of the square grid cannot exceed the design value by 5cm. The foundation pit excavation positioning and control precision can be effectively improved.
Preferably, the construction measurement for excavating earth of the foundation pit based on the elevation control network further comprises: after the foundation pit earthwork is excavated to the anchor rod construction working face, the anchor rod construction elevation is measured by a level meter, and the anchor rod construction elevation is marked on the anchor spray steel bar by adopting red paint.
According to an embodiment of the present application, preferably, before the plane control network is measured and laid on the construction site, the method further includes:
the construction unit pile extension protects the crossed measurement pile points and organizes retesting;
the retest result report is submitted to a supervision unit, a design unit and an owner for retesting;
and if the accuracy of the wire network and the accuracy of the Gao Chengwang can meet the technical requirements in engineering measurement standards, marking and protecting the measurement pile points and guiding and measuring.
And the construction unit pile connection protects the crossed measurement pile points, organizes retest, and reports retest results to the supervision unit, the design unit and the owners for retesting. And if the accuracy of the wire network and the accuracy of the Gao Chengwang can meet the technical requirements in engineering measurement standards, marking and protecting the measurement pile points and guiding and measuring. The accuracy of the wire network and the elevation network can be ensured.
According to the embodiment of the application, preferably, when construction measurement is carried out on foundation pit support piles and foundation pit earth excavation, equal-precision observation is kept; calculating and recording to meet the working requirements; collecting and sorting measurement technical data; a direction observation method is adopted to observe a horizontal angle, and a round trip measurement method is adopted to measure the side length; wherein the horizontal distance between the forward measurement and the backward measurement is worse and is not more than 3mm.
Specifically, the engineering keeps the same precision observation throughout, and the observers, the record personnel, the instruments, the measurement methods, the measurement routes and the like basically keep unchanged. The precision requirement meets the measurement specification and the engineering requirement.
According to the method and the device, the original data are carefully reviewed and checked item by item, the method is scientific (each calculation is required to be carried out in a specified table), the calculation is orderly (when each calculation is related before and after the calculation, the former can start after the calculation is checked, the latter can start), the step-by-step check is carried out (each calculation is independently carried out by different people by different methods, the next work can be carried out after the result is correct), the result is reliable (the data used in the calculation is suitable for the observation precision, and the redundant numbers are reasonably deleted on the premise of meeting the precision so as to improve the calculation speed, and the deletion of the redundant numbers follows the principle of 'four-house, six-in and five-couple'.
Original reality (copy is not allowed), digits are correct (correction is not allowed), the content is complete (the header is filled up, sketches, punctuation marks and the like are attached), and the fonts are complete.
The observers, recorder, instrument, measurement method, measurement route, etc. remain substantially unchanged.
The work of measuring paying-off and checking line must meet the engineering precision requirement, and is strictly carried out according to the measurement specification. The work is active, the cooperation is combined, and the guarantee is provided for the smooth progress of the engineering.
On the premise of executing relevant regulations such as safety, confidentiality and the like, the measuring personnel can use and manage the design drawings and related data, and meanwhile, the data is required to be collected and tidied in time.
The horizontal angle observation is carried out by adopting a direction observation method, and two observation returns are observed at each measuring station; the side length adopts a round trip measurement method, and the horizontal distance between the forward measurement and the return measurement is poorer and is not more than 3mm.
According to an embodiment of the present application, it is preferable that after the measurement is completed, the result of the construction measurement is checked according to the inspection criterion.
In order to ensure the clearance limits of the design and correct line orientation, a strict inspection and detection regime is necessary. The construction control measurement result is subjected to self-checking and residence supervision and approval, and a detection application (application form and result) is provided to a construction supervision part. The construction supervision engineer is notified of the construction control measurement result by the construction supervision unit.
The above description is only of the preferred embodiments of the present application and is not intended to limit the present application, but various modifications and variations can be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (10)
1. The foundation pit construction measurement method is characterized by comprising the following steps of:
measuring and arranging a plane control network on a site to be constructed;
carrying out construction measurement on the foundation pit supporting piles by taking a plane control network as a basis;
and after the measurement is finished, performing foundation pit support pile construction according to the construction measurement result of the foundation pit support pile.
2. The foundation pit construction measurement method according to claim 1, wherein,
measuring and arranging a height control network on a construction site after the plane control network is arranged;
after the foundation pit supporting pile is constructed, carrying out construction measurement on excavation of the earthwork of the foundation pit by taking a height control network as a basis;
and after the measurement is finished, carrying out foundation pit earth excavation construction according to the construction measurement result of the foundation pit earth excavation.
3. The foundation pit construction measurement method according to claim 1, further comprising, before the site to be constructed measures and lays out the planar control network:
the construction unit pile extension protects the crossed measurement pile points and organizes retesting;
the retest result report is submitted to a supervision unit, a design unit and an owner for retesting;
and if the accuracy of the wire network and the accuracy of the Gao Chengwang can meet the technical requirements in engineering measurement standards, marking and protecting the measurement pile points and guiding and measuring.
4. The foundation pit construction measurement method according to claim 1, wherein measuring and laying out a planar control network at a site to be constructed comprises:
according to the standard requirement, plane encryption control wire points are laid on site on the basis of qualified precise wire points delivered by a consignment unit;
and (3) observing and calculating coordinates of the station without stations by adopting a rear intersection method and looking back 2-3 wire points at each corner of the foundation pit.
5. The foundation pit construction measurement method according to claim 2, wherein measuring and laying out the elevation control network at the site to be constructed comprises:
arranging 5 leveling points on the basis of the checked qualified site leveling base points, and forming an additional leveling line by all the leveling points to carry out second-order additional leveling measurement;
and adopting four leveling measurement standards specified by technical standards of engineering measurement standards to add the leveling points.
6. The foundation pit construction measurement method according to claim 1, wherein the same precision observation is maintained when the construction measurement is performed on the foundation pit support pile and the foundation pit earth excavation; calculating and recording to meet the working requirements; collecting and sorting measurement technical data; a direction observation method is adopted to observe a horizontal angle, and a round trip measurement method is adopted to measure the side length; wherein the horizontal distance between the forward measurement and the backward measurement is worse and is not more than 3mm.
7. The foundation pit construction measurement method according to claim 1 or 2, wherein after the measurement is completed, the result of the construction measurement is checked in accordance with an inspection criterion.
8. The foundation pit construction measurement method according to claim 1, wherein the construction measurement of the foundation pit support pile based on the planar control network comprises:
calculating center coordinates of two end point support piles of each straight line segment according to the design drawing, and measuring a first pile position of the end point support pile by using a method of polar coordinates by using on-site control wire guide points;
and positioning a second pile position of the non-end point support pile according to the distance between the non-end point support pile and the end point support pile.
9. The foundation pit construction measurement method according to claim 2, wherein the construction measurement of the excavation of the earth of the foundation pit based on the elevation control network comprises:
during construction, measuring elevation around the foundation pit by using a water level instrument to determine the excavation depth;
when the foundation pit is excavated, due to layered construction, the elevation is timely guided into the foundation pit;
and when the foundation pit is excavated to the layered design bottom elevation, the layered bottom elevation is measured in time so as to guide the mechanical excavation.
10. The foundation pit construction measurement method according to claim 9, wherein the construction measurement of the excavation of the earth of the foundation pit based on the elevation control network further comprises:
after the foundation pit earthwork is excavated to the anchor rod construction working face, the anchor rod construction elevation is measured by a level meter, and the anchor rod construction elevation is marked on the anchor spray steel bar by adopting red paint.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311049282.XA CN117166547A (en) | 2023-08-21 | 2023-08-21 | Foundation pit construction measurement method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311049282.XA CN117166547A (en) | 2023-08-21 | 2023-08-21 | Foundation pit construction measurement method |
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| CN117166547A true CN117166547A (en) | 2023-12-05 |
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