CN113863321A - Diaphragm wall-anchor support structure and diaphragm wall-anchor support structure construction method - Google Patents
Diaphragm wall-anchor support structure and diaphragm wall-anchor support structure construction method Download PDFInfo
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- CN113863321A CN113863321A CN202111259433.5A CN202111259433A CN113863321A CN 113863321 A CN113863321 A CN 113863321A CN 202111259433 A CN202111259433 A CN 202111259433A CN 113863321 A CN113863321 A CN 113863321A
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- anchor
- wall
- steel strand
- support
- diaphragm wall
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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
- 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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- Structural Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention relates to a diaphragm wall-anchor support of foundation pit engineering, in particular to a diaphragm wall-anchor support structure and a diaphragm wall-anchor support structure construction method which are convenient to stretch, large in anchor rod spacing and strong in support capacity. The anchor rod is inserted at intervals on the ground wall, anchor component parts are arranged at intervals on the ground wall, movable base plates are arranged on the bench plate, steel strand anchors are arranged on two sides of each movable base plate, steel strands are arranged between each group of steel strand anchors and adjacent steel strand anchors, the steel strands are connected in anchor holes of the steel strand anchors, supports are arranged between every two adjacent anchor component parts at intervals, and the supports are connected with the ground wall through embedded parts. According to the invention, the problem of weak supporting force between the anchors of the existing diaphragm wall-anchor pulling supporting structure is solved by applying the tension of the anchor rods to the diaphragm wall between the anchor rods through the steel strands and the support distribution.
Description
Technical Field
The invention relates to a diaphragm wall-anchor support of foundation pit engineering, in particular to a diaphragm wall-anchor support structure and a diaphragm wall-anchor support structure construction method which are convenient to stretch, large in anchor rod spacing and strong in support capacity.
Background
The diaphragm wall-anchor pulling support is a common support form in foundation pit engineering, the arrangement distance of anchor rods can have important influence on the anchoring characteristic, the group anchor effect caused by the interaction between the anchor rods can be weakened by expanding the distance of the anchor rods, and the ultimate uplift bearing capacity of the anchor rods is improved; in addition, when a building or an underground structure having a natural foundation exists above a ground layer through which the anchor rods pass, the distance between the anchor rods needs to be enlarged to avoid the ground layer which is prone to collapse and deformation. In a conventional diaphragm wall-anchor pulling supporting structure, the supporting effect of anchor rods on anchoring points and diaphragm walls around the anchoring points is more obvious, when the arrangement distance of the anchor rods is enlarged, the free width of the diaphragm wall between adjacent anchor rods is increased, and the control of foundation pit deformation is weakened. Therefore, a diaphragm wall-anchor pulling support system with the advantages of large anchor rod spacing and strong deformation control capability is needed in foundation pit engineering.
Disclosure of Invention
The invention aims to solve the problems, and provides a diaphragm wall-anchor support structure and a diaphragm wall-anchor support structure construction method which are convenient to stretch, large in anchor rod spacing and strong in support capacity.
The invention solves the problems and adopts the technical scheme that:
a ground connecting wall-anchor support supporting structure comprises a foundation pit, a ground connecting wall and anchor rods, wherein the ground connecting wall is arranged on the inner side wall of the foundation pit, the anchor rods are inserted on the ground connecting wall at intervals and extend into the stratum around the foundation pit, the anchor rods are inclined relative to the horizontal plane, anchor assembly components corresponding to the anchor rods in position one to one are arranged on the ground connecting wall at intervals, one inclined upward end of each anchor rod is connected with the anchor assembly components, each anchor assembly component comprises an anchor seat, a table seat plate and an anchor rod anchor, each anchor seat is composed of two identical and mutually parallel special-shaped steel plates, the inclined angle of each anchor seat is suitable for the anchor rods, the anchor seats are fixed on the surface of the ground connecting wall, the table seat plates are all arranged on the anchor seats, round holes suitable for the anchor rods are all arranged on the table seat plates, the anchor rods are all arranged in the round holes of the table seat plates, the anchor rods are all connected with the anchor rods, movable backing plates are all arranged on the table seat plates, and steel strand anchors are arranged on the two sides of the movable backing plates, the anchor holes are formed in the steel strand anchors at intervals, steel strands are arranged between each group of steel strand anchors and the adjacent steel strand anchors, the steel strands are connected in the anchor holes of the steel strand anchors, supports are arranged between every two adjacent anchor assemblies at intervals, and the support end portions are attached to the steel strands.
A construction method of an underground diaphragm wall-anchor support structure comprises the following steps:
the method comprises the following steps: a ground connecting wall is arranged along the side line of the foundation pit, and embedded parts are arranged at the connecting positions of the surface of the ground connecting wall, the anchor assembly and the support;
step two: along with excavation of the foundation pit, anchor rods are arranged on the inner side wall of the underground diaphragm wall towards the outer ground of the foundation pit at intervals, and the arranging angle is inclined downwards;
step three: welding an anchorage assembly on the embedded part with the hole at the anchor rod position, and welding supports on other embedded parts;
step four: cutting steel strands with proper length and quantity, and connecting the steel strands with a steel strand anchorage device and a movable base plate;
step five: fitting the steel strand with the end part of the support, connecting the anchor rod and the anchor assembly in a combined manner through the anchor rod and the anchor, and primarily locking;
step six: and tensioning the anchor rods to a specified tension at intervals in sequence, and locking the anchor rods.
Compared with the prior art, the invention adopting the technical scheme has the outstanding characteristics that:
firstly, the problem of weak supporting force between anchors of the existing diaphragm wall-anchor pulling supporting structure is solved by applying the tension of the anchor rods to the diaphragm wall between the anchor rods through the steel strands and the support distribution.
Secondly, after the inter-anchor-rod diaphragm wall is subjected to the pre-pressure of support, the active support effect can be exerted on the peripheral stratum, and the inter-anchor support rigidity of the inter-anchor-rod diaphragm wall-pull anchor support structure is improved.
Through anchor rod and steel strand wires linkage work, the application of anchor rod and support prestressing force can be accomplished simultaneously to the stretch-draw anchor rod, and it is convenient to be under construction.
The device can improve the ultimate uplift bearing capacity of the anchor rod, and expand the arrangement distance of the anchor rod of the anchor pulling supporting structure on the basis of ensuring the integral supporting rigidity of the diaphragm wall, thereby avoiding the stratum with easy hole collapse and deformation.
Preferably, the further technical scheme of the invention is as follows:
embedded parts are arranged on the ground connection wall at intervals, the anchor assembly and the support are arranged on the embedded parts, and holes are formed in the embedded parts connected with the anchor assembly; the anchor assembly and the support are more firmly and conveniently fixed.
The movable base plate is an I-shaped plate, flanges on two sides of the movable base plate are respectively provided with a shaft lever which is symmetrically arranged, and the steel strand anchorage is arranged on the shaft lever; the axostylus axostyle department can the free rotation, can adjust the angle of steel strand wires ground tackle wantonly, and then makes the angle of steel strand wires can rotate the adjustment in a flexible way.
The end parts of the supports are provided with curved plates, and the curved plates are attached to the steel strands; the force transmission and the movement between the steel strand and the support are more convenient, and the steel strand is prevented from being damaged.
Welding a curved plate at the end part of the support to ensure that the curved plate is attached to the steel strand; the force transmission and the movement between the steel strand and the support are more convenient, and the steel strand is prevented from being damaged.
Drawings
FIG. 1 is a schematic perspective view of an embodiment of the present invention;
FIG. 2 is a schematic side view of an embodiment of the present invention;
FIG. 3 is a schematic illustration of the configuration of the anchor rod, anchor assembly and steel strand combination of an embodiment of the present invention;
FIG. 4 is a schematic view of the configuration of the anchor block and the deck plate of the present invention;
FIG. 5 is a schematic structural view of a perforated embedment in accordance with an embodiment of the present invention;
FIG. 6 is a schematic view of a connection structure between a movable bolster and a steel strand anchor according to an embodiment of the present invention;
FIG. 7 is a schematic perspective view of a support and imperforate embedment of an embodiment of the present invention;
FIG. 8 is a side view schematic of a support and non-porous embedment of the present invention.
In the figure: a ground wall 1; an anchor rod 2; a curved steel plate 3; a support 4; a steel strand 5; an anchor block 6; a middle plate 7; a table base plate 8; a movable backing plate 9; an anchor rod 10; a steel strand anchorage 11; pre-embedding ribs 12; a pre-buried plate 13; a shaft 14; a baffle 15.
The specific implementation mode is as follows:
the invention will be further illustrated by the following examples, which are intended only for a better understanding of the present invention and therefore do not limit the scope of the invention.
Referring to fig. 1 to 8, a diaphragm wall-anchor support structure comprises a foundation pit, a diaphragm wall 1 and anchor rods 2, wherein the diaphragm wall 1 is attached to the inner side wall of the foundation pit, the anchor rods 2 are inserted into the diaphragm wall 1 at intervals transversely and longitudinally and are anchored into the peripheral stratum of the foundation pit and anchored outside the foundation pit to stabilize the stratum, the anchor rods 2 are inclined relative to the horizontal plane, anchor assemblies corresponding to the anchor rods 2 in position one by one are installed on the diaphragm wall 1 at intervals transversely and longitudinally, the inclined upward ends of the anchor rods 2 are connected with the anchor assemblies, each anchor assembly comprises an anchor seat 6, a bedplate 8 and an anchor rod anchor 10, each anchor seat 6 is composed of two identical and mutually parallel special-shaped steel plates, the inclination angles of the anchor seats 6 are all adapted to the anchor rods 2, the bedplate 8 is all welded on the anchor seats 6, round holes adapted to the anchor rods 10 are all arranged on the bedplate 8, and the anchor rods 10 are all installed in the round holes of the bedplate 8, anchor rod ground tackle 10 all is connected with anchor rod 2, all install movable backing plate 9 on pedestal board 8, movable backing plate 9 is the board of I-shaped, the axostylus axostyle 14 that is the symmetrical form and arranges is all installed to the both sides edge of a wing of movable backing plate 9, steel strand wires ground tackle 11 installs on axostylus axostyle 14, steel strand wires ground tackle 11 is rectangular shape structure, all spaced apart anchor holes that are equipped with on the steel strand wires ground tackle 11, the anchor hole can supply steel strand wires 5 to penetrate the anchor, all install steel strand wires 5 between every group steel strand wires ground tackle 11 and the adjacent steel strand wires ground tackle 11, steel strand wires 5 are connected in the anchor hole of steel strand wires ground tackle 11, axostylus axostyle 14 department can the free rotation, can adjust the angle of steel strand wires ground tackle 11 wantonly, and then make the angle of steel strand wires 5 can rotate the adjustment in a flexible way. A plurality of supports 4 are arranged between every two adjacent anchorage assemblies at intervals, the length of each group of supports 4 is high in the middle and gradually reduced towards the height of two ends, the extending direction of the supports 4 is parallel to the anchor rod 2, the end parts of the supports 4 are welded with middle plates 7, curved surface steel plates 3 are welded on the middle plates 7, baffles 15 are welded at two ends of each curved surface steel plate 3, the curved surface steel plates 3 are attached to the steel strands 5, so that force transfer and movement between the steel strands 5 and the supports 4 are more convenient, the steel strands 5 are prevented from being damaged, embedded parts are arranged on the ground connection wall 1 at intervals, each embedded part comprises a pre-embedded bar 12 and an embedded plate 13, the pre-embedded bars 12 are anchored in concrete of the ground connection wall 1, the embedded plates 13 are welded on the pre-embedded bars 12 and exposed to the surface of the ground connection wall 1, the anchorage assemblies and the supports 4 are welded on the embedded plates 13, holes are formed in the embedded plates 13 welded with the anchor seats 6 of the anchorage assemblies, the anchorage assembly and the support 4 are more firmly and conveniently secured.
The movable backing plate 9 is parallel to the table seat plate 8 after the steel strand 5 is in place and straightened, and is separated from the table seat plate 8 by a gap, the size of the gap is determined according to the size of prestress applied to the steel strand 5, and when the anchor rod 2 is stretched, the movable backing plate 9 is pressed to the variable-angle anchor seat 6 by the anchor rod anchorage device 10 and finally attached to the table seat plate 8.
A construction method of an underground diaphragm wall-anchor support structure comprises the following steps:
the method comprises the following steps: a ground connecting wall 1 is arranged along the side line of the foundation pit, and embedded parts are arranged at the connecting positions of the surface of the ground connecting wall 1, the anchorage device assembly and the support 4;
step two: along with excavation of the foundation pit, arranging anchor rods 2 on the inner side wall of the underground diaphragm wall 1 at intervals towards the stratum outside the foundation pit, wherein the arranging angle is inclined downwards;
step three: an anchorage assembly is welded on the embedded part with the hole at the position of the anchor rod 2, and supports 4 are welded on other embedded parts;
step four: welding a curved steel plate 3 at the end of the support 4;
step five: cutting steel strands 5 with proper length and quantity, and connecting the steel strands 5 with a steel strand anchorage device 11 and a movable backing plate 9;
step six: fitting the steel strand 5 with the curved steel plate 3 at the end part of the support 4, connecting the anchor rod 2 and the anchor assembly in a combined manner through the anchor rod and the anchor 10, and primarily locking;
step seven: and tensioning the anchor rods 2 to a specified tension at intervals in sequence, and locking the anchor rods 2.
According to the invention, the problem of weak inter-anchor supporting force of the existing inter-anchor supporting structure of the anchor rod 2 is solved by distributing the tension of the anchor rod 2 through the steel strand 5 and the support 4, the active supporting effect can be exerted on the peripheral stratum after the inter-anchor supporting structure 1 of the anchor rod 2 is subjected to the pre-pressure of the support 4, the inter-anchor supporting rigidity of the inter-anchor supporting structure of the anchor rod 1 is improved, the pre-stress of the anchor rod 2 and the support 4 can be simultaneously exerted through the linkage work of the anchor rod 2 and the steel strand 5, the construction is convenient and fast, the limit anti-pulling bearing force of the anchor rod 2 can be improved by the device, the arrangement distance of the anchor rod 2 of the anchor supporting structure is expanded on the basis of ensuring the integral supporting rigidity of the inter-anchor supporting structure of the anchor rod 1, and the stratum which is easy to avoid the easy hole collapse and the deformation stratum.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the present invention, which is defined in the appended claims.
Claims (6)
1. The utility model provides a ground is wall-anchor props supporting construction even, includes the foundation ditch, ground even wall and stock, ground even the wall setting on the inside wall of foundation ditch, the stock interval is inserted and is gone up even the wall and stretch into the peripheral stratum of foundation ditch, the relative horizontal plane slope of stock, its characterized in that: anchor components which are in one-to-one correspondence with the positions of the anchor rods are arranged on the diaphragm wall at intervals, one end of each anchor rod, which inclines upwards, is connected with the anchor components, each anchor component comprises an anchor seat, a bedplate and an anchor rod anchor, each anchor seat is composed of two same and parallel special-shaped steel plates, the inclination angle of each anchor seat is adaptive to the anchor rod, each anchor seat is fixed on the surface of the diaphragm wall, each bedplate is arranged on each anchor seat, round holes adaptive to the anchor rod are arranged on each bedplate, each anchor rod anchor is arranged in the round holes of the bedplate, each anchor rod anchor is connected with the anchor rods, each bedplate is provided with a movable backing plate, steel strand anchors are arranged on two sides of each movable backing plate, anchor holes are arranged on each steel strand anchor at intervals, steel strands are arranged between each group of steel strand anchors and adjacent steel strand anchors, the steel strands are connected in the anchor holes of the steel strand anchors, supports are arranged between every two adjacent anchor components at intervals, the supporting end part is jointed with the steel strand.
2. The diaphragm wall-anchor support supporting structure according to claim 1, wherein: the ground is provided with the built-in fitting at interval on the wall even, and ground tackle subassembly and support all set up on the built-in fitting, are provided with the hole on the built-in fitting that is connected with ground tackle subassembly.
3. The diaphragm wall-anchor support supporting structure according to claim 1, wherein: the movable base plate is an I-shaped plate, the flanges on two sides of the movable base plate are provided with shaft levers which are symmetrically arranged, and the steel strand anchorage is arranged on the shaft levers.
4. The diaphragm wall-anchor support supporting structure according to claim 1, wherein: the tip of support all is provided with the curved plate, and the curved plate all laminates with steel strand wires.
5. A construction method of an underground diaphragm wall-anchor support structure is characterized by comprising the following steps:
the method comprises the following steps: a ground connecting wall is arranged along the side line of the foundation pit, and embedded parts are arranged at the connecting positions of the surface of the ground connecting wall, the anchor assembly and the support;
step two: along with excavation of the foundation pit, anchor rods are arranged on the inner side wall of the underground diaphragm wall towards the outer ground of the foundation pit at intervals, and the arranging angle is inclined downwards;
step three: welding an anchorage assembly on the embedded part with the hole at the anchor rod position, and welding supports on other embedded parts;
step four: cutting steel strands with proper length and quantity, and connecting the steel strands with a steel strand anchorage device and a movable base plate;
step five: fitting the steel strand with the end part of the support, connecting the anchor rod and the anchor assembly in a combined manner through the anchor rod and the anchor, and primarily locking;
step six: and tensioning the anchor rods to a specified tension at intervals in sequence, and locking the anchor rods.
6. The diaphragm wall-anchor supporting structure construction method according to claim 5, characterized in that: and welding a curved plate at the end part of the support to ensure that the curved plate is attached to the steel strand.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111259433.5A CN113863321A (en) | 2021-10-28 | 2021-10-28 | Diaphragm wall-anchor support structure and diaphragm wall-anchor support structure construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111259433.5A CN113863321A (en) | 2021-10-28 | 2021-10-28 | Diaphragm wall-anchor support structure and diaphragm wall-anchor support structure construction method |
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| Publication Number | Publication Date |
|---|---|
| CN113863321A true CN113863321A (en) | 2021-12-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111259433.5A Withdrawn CN113863321A (en) | 2021-10-28 | 2021-10-28 | Diaphragm wall-anchor support structure and diaphragm wall-anchor support structure construction method |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105604068A (en) * | 2016-01-15 | 2016-05-25 | 北京工业大学 | Zigzag prestress enclosure purlin for foundation pit engineering and construction method thereof |
| CN208563320U (en) * | 2018-05-25 | 2019-03-01 | 北京市地质工程公司 | A kind of achievable anchor pole is to the two-way cushion block of drawing and its pile-anchor retaining device of application |
| CN210766797U (en) * | 2019-08-22 | 2020-06-16 | 武汉地质工程勘察院 | Deep foundation pit excavation supporting structure |
| CN211735431U (en) * | 2020-01-16 | 2020-10-23 | 中核五院岩土工程河南有限公司 | Foundation pit pile anchor supporting structure |
| CN112982432A (en) * | 2021-02-10 | 2021-06-18 | 建研地基基础工程有限责任公司 | Prestressed concrete foundation pit supporting structure and construction method |
| CN113356198A (en) * | 2021-07-01 | 2021-09-07 | 青岛业高建设工程有限公司市北分公司 | Single-spliced channel steel anchor rod waist beam structure and using method thereof |
-
2021
- 2021-10-28 CN CN202111259433.5A patent/CN113863321A/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105604068A (en) * | 2016-01-15 | 2016-05-25 | 北京工业大学 | Zigzag prestress enclosure purlin for foundation pit engineering and construction method thereof |
| CN208563320U (en) * | 2018-05-25 | 2019-03-01 | 北京市地质工程公司 | A kind of achievable anchor pole is to the two-way cushion block of drawing and its pile-anchor retaining device of application |
| CN210766797U (en) * | 2019-08-22 | 2020-06-16 | 武汉地质工程勘察院 | Deep foundation pit excavation supporting structure |
| CN211735431U (en) * | 2020-01-16 | 2020-10-23 | 中核五院岩土工程河南有限公司 | Foundation pit pile anchor supporting structure |
| CN112982432A (en) * | 2021-02-10 | 2021-06-18 | 建研地基基础工程有限责任公司 | Prestressed concrete foundation pit supporting structure and construction method |
| CN113356198A (en) * | 2021-07-01 | 2021-09-07 | 青岛业高建设工程有限公司市北分公司 | Single-spliced channel steel anchor rod waist beam structure and using method thereof |
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Application publication date: 20211231 |
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