CN114197490A - Cross continuous wall and construction method thereof - Google Patents
Cross continuous wall and construction method thereof Download PDFInfo
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- CN114197490A CN114197490A CN202210017557.0A CN202210017557A CN114197490A CN 114197490 A CN114197490 A CN 114197490A CN 202210017557 A CN202210017557 A CN 202210017557A CN 114197490 A CN114197490 A CN 114197490A
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- 238000010276 construction Methods 0.000 title claims abstract description 39
- 230000002787 reinforcement Effects 0.000 claims abstract description 87
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 37
- 239000010959 steel Substances 0.000 claims abstract description 37
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 32
- 229910052742 iron Inorganic materials 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 18
- 230000000694 effects Effects 0.000 abstract description 7
- 239000004576 sand Substances 0.000 abstract description 5
- 238000009412 basement excavation Methods 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 210000003205 muscle Anatomy 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000012795 verification Methods 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
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
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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
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/16—Arrangement or construction of joints in 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
- E02D5/18—Bulkheads or similar walls made solely of concrete in situ
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Bulkheads Adapted To Foundation Construction (AREA)
Abstract
The invention relates to a cross continuous wall and a construction method thereof, wherein the cross continuous wall comprises a first continuous wall and at least one second continuous wall; the first continuous wall comprises a first reinforcement cage and first concrete coated inside and outside the first reinforcement cage; at least one groove is formed in the side face of the first reinforcement cage; steel plates are arranged at the bottom and two sides of the groove, and the first continuous wall is connected with the second continuous wall through the groove; the second continuous wall comprises a second reinforcement cage and second concrete wrapped inside the second reinforcement cage and outside the second reinforcement cage, and the outer wall of each second continuous wall is abutted to the steel plate of one groove. Under the geological condition of the water-rich sand layer, the risk of foundation pit excavation leakage is reduced, and the construction safety of the foundation pit is improved. The whole construction method is simple to operate, short in construction period, capable of achieving the water stopping effect of the cold joint quickly, further capable of guaranteeing the safety of foundation pit construction, and low in cost.
Description
Technical Field
The invention relates to the technical field of crossed continuous walls, in particular to a crossed continuous wall and a construction method thereof.
Background
When the crossed continuous wall is used as a foundation pit enclosure structure, the side surfaces of the later-constructed continuous wall and the first-constructed continuous wall are connected, and the contact surface is mainly the connection of concrete and concrete. In the actual construction process, a water seepage channel often appears in a cold joint formed between the contact surfaces, and the water leakage phenomenon occurs.
Aiming at the leakage risk of the cold joint, the conventional design scheme is to construct a high-pressure jet grouting pile with the same depth as the continuous wall on the outer side of the foundation pit of the cold joint, reinforce the soil body, form a waterproof curtain and reduce the leakage risk. However, under the geological condition of a water-rich sand layer, the pile forming quality of the high-pressure jet grouting pile is difficult to guarantee, so that the cold joint of the cross continuous wall is basically nine joints with ten leaks, and the safety threat to the foundation pit is great.
Disclosure of Invention
The invention aims to: aiming at the problem of water leakage of cold joints of the crossed continuous walls in the prior art, the invention provides the crossed continuous walls and the construction method thereof, the crossed continuous walls provided by the invention enhance the water stopping effect of the joints of the deep foundation pit continuous walls, reduce the leakage risk of foundation pit excavation under the geological condition of a water-rich sand layer, and improve the construction safety of the foundation pit; and the construction method of the crossed continuous wall is simple, the water stopping cost is low, and the method is convenient to popularize and apply.
In order to achieve the purpose, the invention adopts the technical scheme that:
a cross-wall comprising a first continuous wall and at least one second continuous wall;
the first continuous wall comprises a first reinforcement cage and first concrete coated inside and outside the first reinforcement cage;
at least one groove is formed in the side face of the first reinforcement cage; steel plates are arranged at the bottom and two sides of the groove;
the first continuous wall is connected with the second continuous wall through the groove;
the second continuous wall comprises a second reinforcement cage and second concrete wrapped inside the second reinforcement cage and outside the second reinforcement cage; the outer wall of each second continuous wall is respectively abutted against the steel plate of one groove.
The invention discloses a crossed continuous wall, wherein a reinforcement cage of an underground continuous wall which is constructed firstly is provided with at least one groove, steel plates are welded at the bottom and the inner side wall of the groove, the underground continuous wall which is constructed firstly is not poured in the groove when concrete is poured, one part of the reinforcement cage of the underground continuous wall which is constructed later is placed in the groove, the concrete of the underground continuous wall which is constructed later is filled in the groove, and thus the contact surface of the crossed continuous wall is changed into the contact of the steel plates and the concrete, and the joint water stop quality is greatly improved.
Furthermore, the steel plate is an omega-shaped integrally formed structural member, and the bottom and the side parts of the groove and the two sides of the opening end of the groove are welded with the steel plate.
Further, the width of the groove is matched with the width of the second continuous wall.
Further, the depth of the groove is 20 cm-30 cm. The proper groove depth can not only ensure the strength and rigidity of the enclosure structure, but also ensure the stability of the crossed continuous wall.
Further, the thickness of the steel plate is not less than 1 cm. The thickness of the steel plate is too small, and the steel plate is easy to deform, so that the stability and the water stop effect of the continuous wall are influenced.
The invention also aims to provide a construction method of the crossed continuous wall.
A construction method of a crossed continuous wall comprises the following steps:
step 1, prefabricating the first reinforcement cage; hoisting the first reinforcement cage into the grooving of the first continuous wall;
step 2, pouring first concrete to form the first continuous wall; wherein the groove is not poured with first concrete;
step 3, prefabricating the second reinforcement cage, hoisting the second reinforcement cage into a groove of the second continuous wall, and partially placing the second reinforcement cage in the groove;
and 4, pouring second concrete to form the second continuous wall, wherein the steel plate in the groove is connected with the second concrete of the second continuous wall, and the construction of the crossed continuous wall is completed.
The invention discloses a construction method of a crossed continuous wall, which mainly comprises the steps of prefabricating a first reinforcement cage, a first reinforcement cage below the first reinforcement cage and pouring concrete to form an underground continuous wall, wherein the first reinforcement cage is constructed firstly, the concrete is not poured in a groove, then prefabricating a second reinforcement cage, the second reinforcement cage below the second reinforcement cage is arranged in a groove, part of the second reinforcement cage is positioned in the groove, and the underground continuous wall is constructed after the concrete is poured. The whole construction method is simple to operate, short in construction period, capable of achieving the water stopping effect of the cold joint quickly, further capable of guaranteeing the safety of foundation pit construction, and low in cost.
Further, in the step 1, after the first reinforcement cage is prefabricated, the surface of the steel plate is polished to be smooth. The joint water stopping effect of the steel plate and the concrete is better.
Furthermore, in the step 1, galvanized iron sheets are arranged at two side ends of the opening of the groove, and one end of each galvanized iron sheet is welded with the first reinforcement cage. The galvanized iron sheet can prevent concrete from flowing around, and the inside of the groove is prevented from being filled.
Further, the length of the galvanized iron sheet is at least 1m, and the galvanized iron sheet is used for intercepting and preventing the poured first concrete from falling into the groove; and in the step 2, after the first concrete is poured, cutting the exposed galvanized iron sheet.
Further, in the step 1, before the first reinforcement cage is hoisted, a plurality of horizontal truss ribs arranged at intervals are vertically arranged between the side walls of the two sides of the groove; and in the process of hoisting the first reinforcement cage into the grooving of the first continuous wall, lowering the first reinforcement cage while cutting the horizontal truss rib. A plurality of horizontal truss muscle can increase the stability of recess, avoids the steel reinforcement cage to transfer the in-process, and the steel sheet appears warping.
Further, the distance between the adjacent horizontal truss ribs is at least 3 m.
Furthermore, the distance between the adjacent horizontal truss ribs is 4-6 m.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
1. the invention discloses a crossed continuous wall, wherein a reinforcement cage of an underground continuous wall which is constructed firstly is provided with at least one groove, steel plates are welded at the bottom and the inner side wall of the groove, the underground continuous wall which is constructed firstly is not cast in the groove when concrete is poured, one part of the reinforcement cage of the underground continuous wall which is constructed later is placed in the groove, the groove is filled with concrete after the concrete of the underground continuous wall which is constructed later, so that the contact surface of the crossed continuous wall is changed into the contact between the steel plates and the concrete, the risk of foundation pit excavation leakage is reduced under the geological condition of a water-rich sand layer, and the construction safety of a foundation pit is improved.
2. The invention discloses a construction method of a crossed continuous wall, which mainly comprises the steps of prefabricating a first reinforcement cage, a first reinforcement cage below the first reinforcement cage and pouring concrete to form an underground continuous wall, wherein the first reinforcement cage is constructed firstly, the concrete is not poured in a groove, then prefabricating a second reinforcement cage, the second reinforcement cage below the second reinforcement cage is arranged in a groove, part of the second reinforcement cage is positioned in the groove, and the underground continuous wall is constructed after the concrete is poured. The whole construction method is simple to operate, short in construction period, capable of achieving the water stopping effect of the cold joint quickly, further capable of guaranteeing the safety of foundation pit construction, and low in cost.
Drawings
Fig. 1 is a schematic structural view of a first reinforcement cage in example 1.
Fig. 2 is a schematic structural view of the first reinforcement cage in construction according to embodiment 2.
Fig. 3 is a schematic construction view of a second reinforcement cage according to embodiment 2.
Fig. 4 is a schematic structural view of the intersecting continuous wall in embodiment 2.
Fig. 5 is a schematic structural view of a first reinforcement cage according to embodiment 3.
Icon: 1-a first continuous wall; 11-a first reinforcement cage; 111-grooves; 1111-steel plate; 12-first concrete; 2-a second continuous wall; 21-a second reinforcement cage; 22-second concrete; 3-galvanized iron sheet; 4-horizontal truss ribs.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
A cross continuous wall, as shown in fig. 4, comprises a first continuous wall 1 and a second continuous wall 2, wherein the second continuous wall 2 is positioned at one side of the first continuous wall 1 and is connected with the first continuous wall 1.
The first continuous wall 1 comprises a first reinforcement cage 11 and first concrete 12 coated inside and outside the first reinforcement cage 11; as shown in fig. 1, one side of the first reinforcement cage 11 is provided with a groove 111; steel sheet 1111 is omega shape's integrated into one piece structure, the bottom of recess 111, the lateral part reaches the open end both sides of recess 111 with steel sheet 1111 welds. The depth of the groove is 20cm, and the thickness of the steel plate is 1 cm.
The first continuous wall 1 is connected with the second continuous wall 2 through the groove 111, the second continuous wall 2 comprises a second reinforcement cage 21, and second concrete 22 wrapped inside the second reinforcement cage 21 and outside the second reinforcement cage 21, and the steel plate 1111 is connected with the second concrete 22 of the outer wall of the second continuous wall 2.
The steel reinforcement cage of the underground continuous wall constructed firstly is provided with at least one groove 111, the steel plates 1111 are welded on the bottom and the inner side wall of the groove 111, the underground continuous wall constructed firstly is not poured in the groove 111 when concrete is poured, one part of the steel reinforcement cage of the underground continuous wall constructed later is placed in the groove 111, the concrete of the underground continuous wall constructed after pouring is filled in the groove 111, the contact surface of the crossed continuous wall is changed into the contact of the steel plates and the concrete, and the joint water stop quality is greatly improved. Through verification, the cross continuous wall provided by the invention has no leakage phenomenon under the geological condition of the water-rich sand layer, and the safety of foundation pit construction is ensured.
Example 2
Embodiment 2 provides the construction method of the cross continuous wall of embodiment 1, including the steps of:
step 1, prefabricating the first reinforcement cage 11; a groove is prefabricated on one side of the reinforcement cage, the interior of the groove and the two sides of the opening end of the groove are welded with the steel plate 1111, as shown in figure 1; and then the surface of the steel plate is polished to be smooth.
As shown in fig. 2, a plurality of spaced horizontal truss ribs 4 are vertically welded between the side walls of the two sides of the groove 111; the distance between the adjacent horizontal truss ribs 4 is 5 m. And 1m galvanized iron sheets 3 are welded at two side ends of the opening of the groove 111. Then, hoisting the first reinforcement cage 11 into the grooving of the first continuous wall 1; in the process, the first reinforcement cage 11 is lowered while the horizontal truss ribs 4 are cut off.
Step 2, as shown in fig. 3, pouring first concrete 12 into the first reinforcement cage 11, wherein the galvanized iron sheet 3 is used for intercepting that the poured first concrete 12 falls into the groove 111, so as to form the first continuous wall 1; and cutting off the exposed galvanized iron sheet 3 after the first concrete 12 is poured.
Step 3, as shown in fig. 3, prefabricating a second reinforcement cage 21, sequentially hoisting and transporting the second reinforcement cage 21 into the grooving of the second continuous wall 2, and moving the second reinforcement cage 21 into the groove 111;
and 4, pouring second concrete 22 into the second reinforcement cage 21 to form the second continuous wall 2, as shown in fig. 4, wherein the steel plates 1111 in the grooves 111 are connected with the second concrete 22 of the second continuous wall 2, so as to complete the construction of the crossed continuous wall.
Example 3
Example 3 the same cross continuous wall as example 1 was provided except that the cross continuous wall of example 3 includes two second continuous walls, which are respectively located at both sides of the first continuous wall and connected to the first continuous wall.
The first reinforcement cage provided in embodiment 3 is shown in fig. 5, two grooves 111 are provided on two sides of the first reinforcement cage 11; are respectively positioned at two sides of the first reinforcement cage 11; each groove 111 is welded with the same steel plate 1111 of the Ω shape as in embodiment 1.
The construction method of the intersecting continuous wall in embodiment 3 is the same as that in embodiment 1, except that two second reinforcement cages 21 are prefabricated in step 3, the two second reinforcement cages 21 are sequentially hoisted into the grooving of the second continuous wall 2, and the two second reinforcement cages 21 are respectively moved into the two grooves 111.
The whole construction method is simple to operate, short in construction period, capable of achieving the water stopping effect of the cold joint quickly, further capable of guaranteeing the safety of foundation pit construction, and low in cost.
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 invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A cross-wall, characterized by comprising a first continuous wall (1) and at least one second continuous wall (2);
the first continuous wall (1) comprises a first reinforcement cage (11) and first concrete (12) coated inside and outside the first reinforcement cage (11);
the side surface of the first reinforcement cage (11) is provided with at least one groove (111); steel plates (1111) are arranged at the bottom and two sides of the groove (111);
the first continuous wall (1) is connected with the second continuous wall (2) through the groove (111);
wherein the second continuous wall (2) comprises a second reinforcement cage (21) and a second concrete (22) wrapped inside the second reinforcement cage (21) and outside the second reinforcement cage (21); the outer wall of each second continuous wall (2) is abutted against the steel plate (1111) of one groove.
2. The intersecting continuous wall of claim 1, wherein the steel plate (1111) is an omega-shaped one-piece structure, and the bottom and side portions of the groove (111) and both sides of the open end of the groove (111) are welded to the steel plate (1111).
3. The intersecting continuous wall of claim 1, wherein the depth of the groove (111) is 20cm to 30 cm.
4. The intersecting continuous wall of claim 1, characterized in that the thickness of the steel plates (1111) is not less than 1 cm.
5. A construction method of the cross continuous wall as claimed in any one of claims 1 to 4, comprising the steps of:
step 1, prefabricating the first reinforcement cage (11); hoisting the first reinforcement cage (11) into the grooving of the first continuous wall (1);
step 2, pouring first concrete (12) to form the first continuous wall (1); wherein no first concrete (12) is poured in the groove (111);
step 3, prefabricating the second reinforcement cage (21), hoisting the second reinforcement cage (21) into a groove of the second continuous wall (2), and partially placing the second reinforcement cage (21) in the groove (111);
and 4, building second concrete (22) to form the second continuous wall (2), wherein the steel plates (1111) in the grooves (111) are connected with the second concrete (22) of the second continuous wall (2) to complete the construction of the crossed continuous wall.
6. The construction method of the crossed continuous wall as claimed in claim 5, wherein in the step 1, galvanized iron sheets (3) are arranged at two open side ends of the groove (111), and one end of each galvanized iron sheet (3) is welded with the first reinforcement cage (11).
7. The construction method of a crossed continuous wall according to claim 6, characterized in that the length of the galvanized sheet iron (3) is at least 1m, and the galvanized sheet iron (3) is used for intercepting and preventing the poured first concrete (12) from falling into the groove (111); in the step 2, after the first concrete (12) is poured, the exposed galvanized iron sheet (3) is cut off.
8. The construction method of the crossed continuous wall as claimed in claim 5, wherein in the step 1, before the first reinforcement cage (11) is hoisted, a plurality of horizontal truss ribs (4) arranged at intervals are vertically arranged between the side walls at two sides of the groove (111); and in the process of hoisting the first reinforcement cage (11) into the grooving of the first continuous wall (1), the first reinforcement cage (11) is lowered while the horizontal truss ribs (4) are cut off.
9. The method of constructing a cross-continuous wall according to claim 8, wherein the distance between the adjacent horizontal truss ribs (4) is at least 3 m.
10. The construction method of a cross continuous wall according to claim 9, wherein the distance between the adjacent horizontal truss ribs (4) is 4 to 6 m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210017557.0A CN114197490A (en) | 2022-01-07 | 2022-01-07 | Cross continuous wall and construction method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210017557.0A CN114197490A (en) | 2022-01-07 | 2022-01-07 | Cross continuous wall and construction method thereof |
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| Publication Number | Publication Date |
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| CN114197490A true CN114197490A (en) | 2022-03-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210017557.0A Pending CN114197490A (en) | 2022-01-07 | 2022-01-07 | Cross continuous wall and construction method thereof |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205062858U (en) * | 2015-10-19 | 2016-03-02 | 苏州大学 | Underground continuous wall and whole anti structure of floating of concrete structure bottom plate |
| CN108035337A (en) * | 2017-12-18 | 2018-05-15 | 上海应用技术大学 | For the connector of diaphram wall and the construction method of diaphram wall |
| CN209456993U (en) * | 2018-12-11 | 2019-10-01 | 北京建工土木工程有限公司 | The steel skeleton construction of diaphram wall T shape interface in a kind of tunnel |
| CN110886289A (en) * | 2019-12-18 | 2020-03-17 | 北京市市政工程设计研究总院有限公司 | Underground diaphragm wall structure at inner corner of underground excavation engineering and construction method |
-
2022
- 2022-01-07 CN CN202210017557.0A patent/CN114197490A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205062858U (en) * | 2015-10-19 | 2016-03-02 | 苏州大学 | Underground continuous wall and whole anti structure of floating of concrete structure bottom plate |
| CN108035337A (en) * | 2017-12-18 | 2018-05-15 | 上海应用技术大学 | For the connector of diaphram wall and the construction method of diaphram wall |
| CN209456993U (en) * | 2018-12-11 | 2019-10-01 | 北京建工土木工程有限公司 | The steel skeleton construction of diaphram wall T shape interface in a kind of tunnel |
| CN110886289A (en) * | 2019-12-18 | 2020-03-17 | 北京市市政工程设计研究总院有限公司 | Underground diaphragm wall structure at inner corner of underground excavation engineering and construction method |
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Inventor after: Chen Daquan Inventor after: Liu Haifeng Inventor after: Xu Guanghui Inventor after: Wu Yi Inventor after: Zeng Hui Inventor after: Zhang Haiyang Inventor before: Chen Daquan Inventor before: Liu Haifeng Inventor before: Xu Guanghui Inventor before: Wu Yi Inventor before: Zeng Hui Inventor before: Zhang Haiyang |
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Application publication date: 20220318 |