CN111778986B - Foundation pit support structure convenient to measure and method - Google Patents
Foundation pit support structure convenient to measure and method Download PDFInfo
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- CN111778986B CN111778986B CN202010481098.2A CN202010481098A CN111778986B CN 111778986 B CN111778986 B CN 111778986B CN 202010481098 A CN202010481098 A CN 202010481098A CN 111778986 B CN111778986 B CN 111778986B
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- 238000000034 method Methods 0.000 title description 9
- 238000005259 measurement Methods 0.000 claims abstract description 42
- 238000010276 construction Methods 0.000 claims abstract description 38
- 239000002689 soil Substances 0.000 claims abstract description 23
- 238000012544 monitoring process Methods 0.000 claims abstract description 13
- 238000009412 basement excavation Methods 0.000 claims abstract description 10
- 229910000831 Steel Inorganic materials 0.000 claims description 53
- 239000010959 steel Substances 0.000 claims description 53
- 238000012067 mathematical method Methods 0.000 claims description 5
- 238000011161 development Methods 0.000 claims description 4
- 230000000149 penetrating effect Effects 0.000 claims description 4
- 238000005452 bending Methods 0.000 claims description 3
- 238000000691 measurement method Methods 0.000 abstract description 5
- 239000004576 sand Substances 0.000 abstract description 3
- 101150054854 POU1F1 gene Proteins 0.000 description 20
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D33/00—Testing foundations or foundation structures
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/74—Means for anchoring structural elements or bulkheads
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Abstract
The invention discloses a foundation pit support structure convenient for measurement, which comprises corner beams arranged at four corners of a foundation pit, wherein supporting wall boards are arranged between every two corner beams, and a GPS (global positioning system) measuring instrument, a supporting mechanism and two anchors are arranged on the four corner beams; the invention also provides a construction and measurement method of the foundation pit support structure convenient for measurement, which comprises the following steps: s1, during construction, before excavation of the foundation pit, according to geological and hydrological data, in combination with the conditions of buildings nearby the site, an excavation scheme is determined, waterproof drainage work is performed, and corner beams are arranged at four corners of the foundation pit. The invention has simple structure, simple and convenient construction operation, shortened construction period, greatly improved construction efficiency, stable structure, capability of retaining soil and running sand, improved stability and reliability, convenient measurement and monitoring, low measurement difficulty, simple and convenient operation, time and labor saving and greatly improved measurement efficiency.
Description
Technical Field
The invention relates to the technical field of civil engineering, in particular to a foundation pit support structure convenient to measure and a method.
Background
The foundation pit support structure mainly bears water pressure and soil pressure generated by excavation unloading of a foundation pit, transmits the pressure to the support, and is a construction temporary retaining wall structure for stabilizing the foundation pit. Before excavation of the foundation pit, an excavation scheme is determined according to geological and hydrological data and the conditions of buildings nearby the site, and waterproof drainage work is performed. In the construction process of the foundation pit engineering, the horizontal displacement of the foundation pit support structure at different depths is a main evaluation index of the foundation pit engineering safety, so that the horizontal displacement is a main monitoring item in the construction process of the foundation pit.
The existing foundation pit support structure construction and measurement methods mainly comprise an axis method, a small angle method, a total station coordinate change method and the like, particularly when the area of a foundation pit is large, the measurement methods are complicated and inconvenient, labor and time are wasted, the measurement efficiency is low, the existing foundation pit support structures are complex, the measurement difficulty is increased, the construction is not easy, the construction period is long, and soil and quicksand are difficult to block.
Disclosure of Invention
The invention aims to solve the defects in the prior art, provides a foundation pit support structure convenient to measure and a method thereof, and solves the problems that the existing foundation pit support structure is complex in structure, complicated in construction operation, long in construction period, low in construction efficiency, difficult in retaining soil and blocking flowing sand, inconvenient in measurement and monitoring, high in measurement difficulty, complicated in operation, time-consuming and labor-consuming, and low in measurement efficiency.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a foundation ditch enclosure structure convenient to measurement, is including setting up the angle beam in four angles departments of foundation ditch, a plurality of nail of staying of fixedly connected with on the lower extreme lateral wall of angle beam, angle beam all is equipped with a dado, four between two liang all be equipped with GPS measuring apparatu, supporting mechanism and two ground tackle on the angle beam, four angle beam all is equipped with rather than the slot that the position is corresponding on being close to a lateral wall of dado, the tip of a dado extends to in the slot and rather than inner wall sliding connection and counterbalance, GPS measuring apparatu includes control cabinet, GPS chip and four construction bolts, two ground tackle all includes stock and a plurality of barb, run through on the lateral wall of angle beam and be equipped with two inclined holes corresponding with the stock position, a plurality of the impartial interval fixed connection of barb is on the lateral wall of stock, supporting mechanism includes angle block, first pivot, support steel bushing, Flexible steel column, second pivot, backup pad and two adjusting bolt.
Preferably, four corner beams are all set to be L-shaped, and the standing nails and the corner beams are integrally formed.
Preferably, GPS chip fixed connection is on the upper end lateral wall of control seat, four all be equipped with four screw holes on the upper end lateral wall of angle beam, the control seat can be dismantled through four construction bolt cooperation screw holes and connect on the angle beam.
Preferably, the inclined hole and the anchor rod are both arranged obliquely downwards, and the aperture of the inclined hole is larger than the maximum width of the anchor rod provided with the barbs.
Preferably, it is a plurality of the barb is triangle-shaped and sets up, and is a plurality of the barb is integrated into one piece with the stock.
Preferably, the angle block is fixedly connected to the side wall of the angle beam, one end, close to the angle beam, of the supporting steel sleeve is rotatably connected with the side wall of the angle block through a first rotating shaft, the end portion of the telescopic steel column extends into the supporting steel sleeve and is in sliding connection with the inner wall of the supporting steel sleeve, the two adjusting bolts are arranged at one end, far away from the angle beam, of the supporting steel sleeve, and a plurality of adjusting grooves are formed in the side walls, at equal intervals, of the two sides, corresponding to the two adjusting bolts, of the telescopic steel column.
Preferably, the upper end side wall of the supporting plate is rotatably connected to the end side wall, away from one end of the supporting steel sleeve, of the telescopic steel column through a second rotating shaft, and the lower end side wall of the supporting plate is fixedly connected with a plurality of ground nails.
The invention also provides a construction and measurement method of the foundation pit support structure convenient for measurement, which comprises the following steps:
s1, during construction, before excavation of the foundation pit, according to geological and hydrological data, in combination with the conditions of buildings nearby the site, an excavation scheme is determined, waterproof drainage work is performed, corner beams are arranged at four corners of the foundation pit, so that right-angle edges of the corner beams are abutted and contacted with the inner wall of the foundation pit, and meanwhile, a plurality of anchor nails at the lower end of the corner beams are inserted into a bottom soil layer of the foundation pit;
s2, supporting the angle beam through the supporting mechanism, adjusting the two adjusting bolts when supporting, rotating the angle between the supporting steel sleeve and the angle beam, extending and adjusting the telescopic steel column, enabling the side wall of the lower end of the supporting plate to be abutted against the inner wall of the bottom of the foundation pit, inserting a plurality of ground nails into the soil layer of the bottom of the foundation pit, and locking the two adjusting bolts to fix the telescopic steel column on the supporting steel sleeve;
s3, penetrating the two anchors through the two inclined holes of the corner beam, enabling the anchor rods and the barbs to be deeply and obliquely inserted into an inner wall soil layer of the foundation pit, and bending the parts of the anchor rods, which are more than the corner beam, by using a tool to prevent the whole anchor from separating from the corner beam through the inclined holes;
s4, inserting the supporting wallboard between the two corner beams, inserting the supporting wallboard into the slots on the side walls of the corner beams, and enabling the side walls of the lower ends of the supporting wallboards to be abutted and contacted with the inner wall of the bottom of the foundation pit;
s5, when in measurement, the angle beam is used as a monitoring point when in measurement, the control seat provided with the GPS chip is arranged on the angle beam through four mounting bolts matched with threaded holes, the positioning function of the GPS chip is utilized to obtain the coordinates of four points, then the data such as distance, area and the like are calculated through a mathematical method, and field measurement personnel should record the data monitored and calculated by the GPS measuring instrument at regular time and analyze and comment the change and development condition of the monitored and calculated data in time.
The invention has the following beneficial effects:
1. the rectangular support is formed by the corner beam matched support wallboard, the construction efficiency is greatly improved, the corner beam matched support wallboard is stable in structure and can not only keep soil but also keep off quicksand.
2. Through set up on the angle beam and stay nail, inclined hole, a support wallboard, ground tackle and supporting mechanism, realize greatly improving stability and reliability.
3. Through set up the GPS measuring apparatu on four angle beams, the monitoring point when the angle beam is measured as, realizes conveniently measuring the monitoring to it, and the measurement degree of difficulty is low, and easy operation is convenient, and labour saving and time saving has greatly improved measurement of efficiency.
In conclusion, the invention has the advantages of simple structure, simple and convenient construction operation, shortened construction period, greatly improved construction efficiency, stable structure, capability of retaining soil and running sand, improved stability and reliability, convenient measurement and monitoring, low measurement difficulty, simple and convenient operation, time and labor saving and greatly improved measurement efficiency.
Drawings
Fig. 1 is a schematic view of an integral elevation structure of a foundation pit support structure convenient for measurement according to the present invention;
FIG. 2 is an enlarged view of the structure at A in FIG. 1;
FIG. 3 is a schematic view of a partial elevation structure of a foundation pit support structure convenient for measurement according to the present invention;
fig. 4 is a schematic structural view of the foundation pit support structure convenient for measurement when the corner beam and other parts are installed.
In the figure: the device comprises a foundation pit 1, an angle beam 2, slots 21, a standing nail 22, a threaded hole 23, an inclined hole 24, a wall panel 3, a GPS measuring instrument 4, a control seat 41, a GPS chip 42, a mounting bolt 43, an anchorage 5, an anchor rod 51, barbs 52, a support mechanism 6, an angle block 61, a first rotating shaft 62, a support steel sleeve 63, a telescopic steel column 64, a support plate 65 and an adjusting bolt 66.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Referring to fig. 1-4, a foundation pit support structure convenient for measurement comprises corner beams 2 arranged at four corners of a foundation pit 1, wherein the four corner beams 2 are all arranged in an L shape, a plurality of stay nails 22 are fixedly connected to the side wall of the lower end of each corner beam 2, the stay nails 22 and the corner beams 2 are integrally formed, the corner beams 2 are inserted into the underground soil layer of the foundation pit 1 through the stay nails 22, supporting wall boards 3 are arranged between every two corner beams 2, the supporting structure is simple, a GPS measuring instrument 4, a supporting mechanism 6 and two anchors 5 are arranged on each corner beam 2, slots 21 corresponding to the positions of the corner beams 2 are arranged on the side wall of one side of each corner beam 2 close to each supporting wall board 3, the end parts of the supporting wall boards 3 extend into the slots 21 and are in sliding connection with the inner walls of the supporting wall boards and abut against the inner walls of the corner beams 2, the supporting wall boards 3 can be made of high-thickness steel plates, the intensity is high, avoids collapsing around foundation ditch 1, simple structure, and construction operation is simple and convenient, and the time limit for a project shortens, has greatly improved the efficiency of construction, and the structure is firm, not only keeps off the soil but also keeps off the quicksand, has improved stability and reliability.
Wherein, GPS measuring apparatu 4 includes control seat 41, GPS chip 42 and four construction bolts 43, GPS chip 42 fixed connection is on the upper end lateral wall of control seat 41, all be equipped with four screw holes 23 on the upper end lateral wall of four angle beams 2, control seat 41 can dismantle through four construction bolts 43 cooperation screw holes 23 and connect on angle beam 2, GPS measuring apparatu 4 adopts GPS global satellite positioning system can provide real-time longitude, latitude, navigation and locating information such as elevation, utilize GPS's locate function, obtain the coordinate of each point, rethread simple mathematical method can calculate the distance, data such as area, conveniently measure the monitoring to it, the measurement degree of difficulty is low, easy operation is convenient, time saving and labor saving, greatly improved measurement efficiency.
Wherein, two ground tackle 5 all include stock 51 and a plurality of barb 52, run through on the lateral wall of angle beam 2 and be equipped with two inclined holes 24 corresponding with stock 51 position, the impartial interval fixed connection of a plurality of barbs 52 is on the lateral wall of stock 51, inclined holes 24 and stock 51 all incline and set up down, the aperture of inclined holes 24 is greater than the maximum width who is provided with the stock 51 of barb 52, a plurality of barbs 52 are triangle-shaped and set up, a plurality of barbs 52 are integrated into one piece with stock 51, need bend the partial instrument that uses of stock 51 more angle beam 2 in the construction, avoid whole ground tackle 5 to break away from angle beam 2 through inclined holes 24, ground tackle 5 that is provided with a plurality of barbs 52 can provide the traction force that the utensil was dragged for angle beam 2, improve angle beam 2's firm degree, stability and reliability have been improved.
Wherein, the supporting mechanism 6 comprises an angle block 61, a first rotating shaft 62, a supporting steel sleeve 63, a telescopic steel column 64, a second rotating shaft, a supporting plate 65 and two adjusting bolts 66, the angle block 61 is fixedly connected on the side wall of the angle beam 2, one end of the supporting steel sleeve 63 close to the angle beam 2 is rotatably connected with the side wall of the angle block 61 through the first rotating shaft 62, the end part of the telescopic steel column 64 extends into the supporting steel sleeve 63 and is slidably connected with the inner wall thereof, the two adjusting bolts 66 are arranged at one end of the supporting steel sleeve 63 far away from the angle beam 2, a plurality of adjusting grooves are arranged on the side walls of the telescopic steel column 64 and two sides corresponding to the two adjusting bolts 66 at equal intervals, the side wall of the upper end of the supporting plate 65 is rotatably connected on the side wall of the end of the telescopic steel column 64 far away from the supporting steel sleeve 63 through the second rotating shaft, a plurality of ground nails are fixedly connected on the side wall of the lower end of the supporting plate 65, the supporting mechanism 6 is convenient to rotatably adjust to support the angle beam 2, during the support, transfer two adjusting bolt 66 loose, rotate the angle of adjusting support steel bushing 63 and angle beam 2 and extend and adjust flexible steel column 64 for the lower extreme lateral wall of backup pad 65 offsets with the bottom inner wall of foundation ditch 1 and contacts, and makes a plurality of ground nails insert the bottom soil layer of foundation ditch 1, locks two adjusting bolt 66 and fixes flexible steel column 64 on supporting steel bushing 63, has improved stability and reliability.
The invention also provides a construction and measurement method of the foundation pit support structure convenient for measurement, which comprises the following steps:
s1, during construction, before the foundation pit 1 is excavated, an excavation scheme is determined according to geological and hydrological data and by combining the conditions of buildings nearby the site, waterproof drainage work is performed, corner beams 2 are arranged at four corners of the foundation pit 1, so that right-angle edges of the corner beams 2 are abutted and contacted with the inner wall of the foundation pit 1, and meanwhile, a plurality of standing nails 22 at the lower end of the corner beams 2 are inserted into a bottom soil layer of the foundation pit 1;
s2, supporting the angle beam 2 through the supporting mechanism 6, adjusting the two adjusting bolts 66 when supporting, rotating the supporting steel sleeve 63 to adjust the angle between the supporting steel sleeve and the angle beam 2, extending and adjusting the telescopic steel column 64, enabling the side wall of the lower end of the supporting plate 65 to be abutted against the inner wall of the bottom of the foundation pit 1, inserting a plurality of ground nails into the soil layer of the bottom of the foundation pit 1, and locking the two adjusting bolts 66 to fix the telescopic steel column 64 on the supporting steel sleeve 63;
s3, penetrating the two anchors 5 through the two inclined holes 24 of the corner beam 2, enabling the anchor rods 51 and the barbs 52 to be deeply and obliquely inserted into the soil layer of the inner wall of the foundation pit 1, and bending the parts of the anchor rods 51, which are more than the corner beam 2, by using a tool to prevent the whole anchor 5 from being separated from the corner beam 2 through the inclined holes 24;
s4, inserting the supporting wallboard 3 between the two corner beams 2, inserting the supporting wallboard 3 into the slots 21 on the side walls of the corner beams 2, and enabling the side wall of the lower end of the supporting wallboard 3 to be abutted and contacted with the inner wall of the bottom of the foundation pit 1, the structure is simple, the construction operation is simple and convenient, the construction period is shortened, the construction efficiency is greatly improved, the structure is stable, soil and quicksand can be blocked, and the stability and the reliability are improved;
s5, when in measurement, the angle beam 2 is used as a monitoring point during measurement, the control base 41 provided with the GPS chip 42 is arranged on the angle beam 2 through the four mounting bolts 43 in cooperation with the threaded holes 23, the positioning function of the GPS chip 42 is utilized to obtain coordinates of four points, then data such as distance, area and the like are calculated through a mathematical method, field measurement personnel should record data monitored and calculated by the GPS measuring instrument 4 at regular time, changes and development conditions of the data monitored and calculated are analyzed and evaluated in time, the measurement and monitoring are convenient, the measurement difficulty is low, the operation is simple and convenient, time and labor are saved, and the measurement efficiency is greatly improved.
In the invention, when a foundation pit 1 is constructed according to an excavation scheme, firstly, angle beams 2 are arranged at four corners of the foundation pit 1, so that right-angle sides of the angle beams 2 are abutted to and contacted with the inner wall of the foundation pit 1, meanwhile, a plurality of standing nails 22 at the lower end of the angle beams 2 are inserted into a bottom soil layer of the foundation pit 1, then the angle beams 2 are supported through a supporting mechanism 6, during supporting, two adjusting bolts 66 are loosened, the angle between a supporting steel sleeve 63 and the angle beams 2 is adjusted in a rotating way, an adjustable telescopic steel column 64 is extended and adjusted, so that the side wall at the lower end of a supporting plate 65 is abutted to and contacted with the inner wall at the bottom of the foundation pit 1, a plurality of ground nails are inserted into the bottom soil layer of the foundation pit 1, two adjusting bolts 66 are locked, the telescopic steel column 64 is fixed on the supporting steel sleeve 63, then two anchorage devices 5 penetrate through two inclined holes 24 of the angle beams 2, and the anchor rods 51 and the barb 52 are deeply and obliquely inserted into the soil layer of the inner wall of the foundation pit 1, then the part of the anchor rods 51 with the angle beams 2 are bent by using tools, the whole anchorage device 5 is prevented from being separated from the corner beams 2 through the inclined holes 24, the supporting wall plate 3 is inserted between the two corner beams 2 at the moment, the supporting wall plate 3 is inserted into the slots 21 on the side walls of the corner beams 2, and the side wall of the lower end of the supporting wall plate 3 is in abutting contact with the inner wall of the bottom of the foundation pit 1, so that the structure is simple, the construction operation is simple and convenient, the construction period is shortened, the construction efficiency is greatly improved, the structure is stable, soil and quicksand can be blocked, and the stability and the reliability are improved;
when the foundation pit 1 is measured and monitored, the corner beam 2 is used as a monitoring point during measurement, the control seat 41 provided with the GPS chip 42 is arranged on the corner beam 2 through the four mounting bolts 43 and the threaded holes 23, the coordinates of four points are obtained by utilizing the positioning function of the GPS chip 42, the data such as distance, area and the like are calculated by a mathematical method, a field measurer needs to record the data monitored and calculated by the GPS measuring instrument 4 at regular time, the change and the development condition of the data monitored and calculated are analyzed and evaluated in time, the measurement and monitoring are convenient, the measurement difficulty is low, the operation is simple and convenient, the time and the labor are saved, and the measurement efficiency is greatly improved.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (1)
1. A construction method of a foundation pit support structure convenient for measurement comprises corner beams (2) arranged at four corners of a foundation pit (1), and is characterized in that a plurality of standing nails (22) are fixedly connected to the side wall of the lower end of each corner beam (2), a supporting wall plate (3) is arranged between every two corner beams (2), a GPS measuring instrument (4), a supporting mechanism (6) and two anchors (5) are arranged on each of the four corner beams (2), slots (21) corresponding to the positions of the four corner beams are arranged on the side wall of one side, close to the supporting wall plate (3), of each corner beam (2), the end portions of the supporting wall plates (3) extend into the slots (21) and are in sliding connection with the inner walls of the supporting wall plates and abut against the inner walls of the supporting wall plates, each GPS measuring instrument (4) comprises a control seat (41), a GPS chip (42) and four mounting bolts (43), each of the two anchors (5) comprises an anchor rod (51) and a plurality of barbs (52), two inclined holes (24) corresponding to the positions of the anchor rods (51) are formed in the side walls of the corner beams (2) in a penetrating mode, the barbs (52) are fixedly connected to the side walls of the anchor rods (51) at equal intervals, and the supporting mechanism (6) comprises a corner block (61), a first rotating shaft (62), a supporting steel sleeve (63), a telescopic steel column (64), a second rotating shaft, a supporting plate (65) and two adjusting bolts (66);
the four corner beams (2) are all arranged in an L shape, and the standing nails (22) and the corner beams (2) are integrally formed;
the GPS chip (42) is fixedly connected to the side wall of the upper end of the control seat (41), four threaded holes (23) are formed in the side walls of the upper ends of the four corner beams (2), and the control seat (41) is detachably connected to the corner beams (2) through four mounting bolts (43) matched with the threaded holes (23);
the inclined hole (24) and the anchor rod (51) are both arranged obliquely downwards, and the aperture of the inclined hole (24) is larger than the maximum width of the anchor rod (51) provided with the barb (52);
the barbs (52) are arranged in a triangular shape, and the barbs (52) and the anchor rod (51) are integrally formed;
the angle block (61) is fixedly connected to the side wall of the angle beam (2), one end, close to the angle beam (2), of the supporting steel sleeve (63) is rotatably connected with the side wall of the angle block (61) through a first rotating shaft (62), the end part of the telescopic steel column (64) extends into the supporting steel sleeve (63) and is in sliding connection with the inner wall of the supporting steel sleeve, the two adjusting bolts (66) are arranged at one end, far away from the angle beam (2), of the supporting steel sleeve (63), and a plurality of adjusting grooves are formed in the side walls, corresponding to the two adjusting bolts (66), of the telescopic steel column (64);
the side wall of the upper end of the supporting plate (65) is rotatably connected to the side wall of the end part of one end, far away from the supporting steel sleeve (63), of the telescopic steel column (64) through a second rotating shaft, and the side wall of the lower end of the supporting plate (65) is fixedly connected with a plurality of ground nails;
the construction method of the foundation pit support structure convenient for measurement comprises the following steps:
s1, during construction, before the foundation pit (1) is excavated, an excavation scheme is determined according to geological and hydrological data and by combining the conditions of buildings nearby the site, waterproof drainage work is performed, corner beams (2) are arranged at four corners of the foundation pit (1), so that right-angle edges of the corner beams (2) are abutted and contacted with the inner wall of the foundation pit (1), and meanwhile, a plurality of standing nails (22) at the lower end of the corner beams (2) are inserted into a bottom soil layer of the foundation pit (1);
s2, supporting the angle beam (2) through the supporting mechanism (6), adjusting the two adjusting bolts (66) when supporting, adjusting the angle between the supporting steel sleeve (63) and the angle beam (2) in a rotating mode, extending and adjusting the telescopic steel column (64), enabling the side wall of the lower end of the supporting plate (65) to be abutted and contacted with the inner wall of the bottom of the foundation pit (1), enabling a plurality of ground nails to be inserted into the soil layer of the bottom of the foundation pit (1), and locking the two adjusting bolts (66) to fix the telescopic steel column (64) on the supporting steel sleeve (63);
s3, penetrating the two anchorage devices (5) through the two inclined holes (24) of the angle beam (2), enabling the anchor rods (51) and the barbs (52) to be obliquely inserted into the soil layer of the inner wall of the foundation pit (1), and bending the parts of the anchor rods (51) which are beyond the angle beam (2) by using a tool to prevent the whole anchorage devices (5) from being separated from the angle beam (2) through the inclined holes (24);
s4, inserting the supporting wall panel (3) between the two corner beams (2), inserting the supporting wall panel (3) into the slot (21) on the side wall of the corner beam (2), and enabling the side wall of the lower end of the supporting wall panel (3) to be abutted and contacted with the inner wall of the bottom of the foundation pit (1);
s5, during measurement, the angle beam (2) is used as a monitoring point during measurement, the control seat (41) provided with the GPS chip (42) is arranged on the angle beam (2) through four mounting bolts (43) and matched with the threaded holes (23), coordinates of four points are obtained by utilizing the positioning function of the GPS chip (42), distance and area data are calculated through a mathematical method, field measurement personnel should record data monitored and calculated by the GPS measuring instrument (4) at regular time, and changes and development conditions of the monitored and calculated data are analyzed and commented in time.
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| CN202010481098.2A CN111778986B (en) | 2020-05-31 | 2020-05-31 | Foundation pit support structure convenient to measure and method |
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| CN202010481098.2A CN111778986B (en) | 2020-05-31 | 2020-05-31 | Foundation pit support structure convenient to measure and method |
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| CN111778986B true CN111778986B (en) | 2021-11-30 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113373942A (en) * | 2021-06-30 | 2021-09-10 | 中国十七冶集团有限公司 | Narrow and small area underground structure supporting construction guiding device |
| CN114277804B (en) * | 2021-12-19 | 2023-09-05 | 深圳市建宙建设工程有限公司 | A stable foundation pit support beam and its installation method |
| CN115637651B (en) * | 2022-11-04 | 2025-08-22 | 四川省交通建设集团股份有限公司 | A tension frame |
| CN116289970B (en) * | 2022-11-30 | 2025-11-18 | 甘肃送变电工程有限公司 | A foundation pit support device for substation civil construction |
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