CN113026722A - Combined water stop structure with multilateral ribbed plates for underground continuous wall and construction method - Google Patents
Combined water stop structure with multilateral ribbed plates for underground continuous wall and construction method Download PDFInfo
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- CN113026722A CN113026722A CN202110198117.5A CN202110198117A CN113026722A CN 113026722 A CN113026722 A CN 113026722A CN 202110198117 A CN202110198117 A CN 202110198117A CN 113026722 A CN113026722 A CN 113026722A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 126
- 238000010276 construction Methods 0.000 title claims abstract description 18
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 59
- 239000010959 steel Substances 0.000 claims abstract description 59
- 239000004567 concrete Substances 0.000 claims abstract description 47
- 230000002787 reinforcement Effects 0.000 claims abstract description 26
- 239000010802 sludge Substances 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 claims description 20
- 239000002002 slurry Substances 0.000 claims description 12
- 239000002689 soil Substances 0.000 claims description 12
- 230000008569 process Effects 0.000 claims description 11
- 230000003068 static effect Effects 0.000 claims description 6
- 238000003466 welding Methods 0.000 claims description 6
- 230000000694 effects Effects 0.000 claims description 4
- GNFTZDOKVXKIBK-UHFFFAOYSA-N 3-(2-methoxyethoxy)benzohydrazide Chemical compound COCCOC1=CC=CC(C(=O)NN)=C1 GNFTZDOKVXKIBK-UHFFFAOYSA-N 0.000 claims description 3
- FGUUSXIOTUKUDN-IBGZPJMESA-N C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 Chemical compound C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 FGUUSXIOTUKUDN-IBGZPJMESA-N 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 3
- 239000013049 sediment Substances 0.000 claims description 2
- 230000006872 improvement Effects 0.000 description 7
- 230000008595 infiltration Effects 0.000 description 3
- 238000001764 infiltration Methods 0.000 description 3
- 230000003487 anti-permeability effect Effects 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 238000005096 rolling process 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
- 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
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/06—Restraining of underground water
- E02D19/12—Restraining of underground water by damming or interrupting the passage of underground water
- E02D19/18—Restraining of underground water by damming or interrupting the passage of underground water by making use of sealing aprons, e.g. diaphragms made from bituminous or clay material
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- Environmental & Geological Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Bulkheads Adapted To Foundation Construction (AREA)
Abstract
The invention discloses a multi-side ribbed plate combined water stop structure of an underground continuous wall, which comprises the following steps of a) excavating a groove and building a guide wall; b) grooving the underground continuous wall on one side of the joint; c) removing sludge and residues at the bottom of the tank; d) hoisting the joint pipe; e) hoisting a reinforcement cage; f) hanging a water stopping device; g) a guide pipe is arranged, and concrete is poured underwater; h) inserting H-shaped steel into the water stopping device, and pouring fine aggregate concrete; i) grooving the underground continuous wall on the other side of the joint; j) pulling out the joint pipe; m) circulating the steps d) to j) until the construction of the whole underground continuous wall is completed. Wherein, the water stop device is a multilateral ribbed slab stiffened concrete-filled steel tube water stop structure. The invention improves the safety coefficient and the water stopping strength.
Description
Technical Field
The invention relates to a multi-side ribbed plate combined water stop structure of an underground continuous wall and a construction method.
Background
The underground continuous wall is a foundation engineering, and adopts a trenching machine on the ground, and under the condition of slurry wall protection, a long and narrow deep groove is excavated along the peripheral axis of the deep excavation engineering, after the groove is cleaned, a steel reinforcement cage is hung in the groove, then underwater concrete is poured by using a conduit method to construct a unit groove section, and the steps are carried out section by section, so that a continuous reinforced concrete wall is constructed underground to be used as a structure for intercepting water, preventing seepage, bearing and retaining water. Once the underground diaphragm wall is not well treated, water seepage and other conditions are easily caused. How to improve the quality of underground continuous wall, prevent that the infiltration situation from taking place, improve the bearing, be the thing that this patent was waited to solve.
Disclosure of Invention
The purpose of the invention is as follows: the invention aims to overcome the defects in the prior art and provides the combined water stopping structure with the multi-edge ribbed plates of the underground continuous wall, which has good bearing capacity and good water stopping effect.
The technical scheme is as follows: the invention relates to a construction method of a multilateral ribbed slab combined water stop structure of an underground continuous wall, which specifically comprises the following steps:
a) excavating a groove and building a guide wall;
b) grooving the underground continuous wall on one side of the joint: the trenching machine excavates the underground diaphragm wall groove section at one side of the joint along the guide wall, the excavated groove section of each underground diaphragm wall is 6m, slurry wall protection treatment is carried out in the excavating process, and two ends of each unit groove section are excavated firstly, and then the middle part is excavated; the trenching machine enlarges and excavates according to the 120mm of the guide wall enlarged end at the joint, ensures that slurry is full and avoids hole collapse;
c) removing sludge and residues at the bottom of the tank;
d) hoisting a joint pipe: the joint pipe is a rectangular joint pipe;
e) hoisting a reinforcement cage;
f) hanging a water stopping device; the water stopping device is hung in the center of the joint, after the water stopping device sinks to be in place, a steel base plate is placed on the top of the water stopping device, the water stopping device is slowly pressed down in a static pressure mode, at least the whole water stopping device is pressed down by 500mm, and after the water stopping device is completely pressed down, the top of the steel reinforcement cage is fixed with the water stopping device through a welding method; the water stopping device is a multi-edge ribbed plate stiffened steel pipe concrete water stopping structure;
g) a guide pipe is arranged, and concrete is poured underwater;
h) inserting H-shaped steel into the water stopping device, and pouring fine aggregate concrete;
i) grooving the underground continuous wall on the other side of the joint;
j) pulling out the joint pipe;
m) circulating the steps d) to j) until the construction of the whole underground continuous wall is completed.
The invention has the further improvement that in the step a), the depth of the guide wall is 1500mm, and the top of the guide wall is 100mm higher than the ground;
at the joint of the diaphragm wall, the design width of the guide wall is 120mm larger than that of each of two sides of the diaphragm wall.
The invention is further improved in that in the step c), after the underground continuous wall on one side of the joint is grooved, the cleaning work of sludge and residues at the bottom of the groove is carried out in time, especially the requirement of the design size is ensured at the expanded end of the joint, the detection of indexes such as grooving depth, verticality and the like is carried out in time, the groove depth is not less than the design depth, and the sediment thickness is not more than 80 mm.
The invention has the further improvement that in the step e), the steel reinforcement cage is hoisted into a groove by adopting a 50t auxiliary crane matched with a 150t main crane through one-time integral hoisting; a safe interval of 100mm is reserved at the water stopping device, and the length of each section of the steel reinforcement cage is 200mm smaller than that of the corresponding groove section.
The invention has the further improvement that in the step f), after the steel reinforcement cage is completely hoisted and fixed, the multi-side ribbed plate stiffened concrete-filled steel tube water stop structure is hoisted, and the water stop device is hoisted in the center of the joint; the length of the water stopping device exceeds the depth of the diaphragm wall by 500 mm-800 mm, the water stopping device is integrally vertical and slowly hung at a designed position, after the water stopping device is sunk to be in place, a steel base plate is placed at the top of the water stopping device, the water stopping device is slowly pressed down in a static pressure mode, the water stopping device is integrally pressed down by 500mm at least, the water stopping device is completely pressed down, and a steel reinforcement cage is fixed with the water stopping device at the top of the steel reinforcement cage by adopting a welding method.
The invention has the further improvement that in the step g), after the reinforcement cage and the water stop device are hoisted and fixed, the guide pipes are lowered to pour concrete underwater, the two guide pipes are adopted to symmetrically pour concrete, the displaced slurry is timely treated in the process of pouring the concrete underwater, the concrete pouring speed of the two guide pipes is effectively controlled, and the concrete pouring height difference at two sides is controlled until the concrete pouring is finished.
The invention has the further improvement that in the step H), after the concrete is poured underwater, the depth of the underground continuous wall exceeds 12m, the H-shaped steel can be inserted into the tubular pile of the water stopping device close to one side of the permeable soil layer, and the H-shaped steel can be directly poured into the tubular pile of the water stopping device far away from one side of the permeable soil layer without being inserted;
when the depth of the underground diaphragm wall exceeds 18m, inserting H-shaped steel into the pipe piles of the water stopping device, inserting H-shaped steel into two symmetrical pipe piles of the water stopping device, and pouring concrete.
The invention has the further improvement that in the step i), after the construction of the underground continuous wall on one side of the joint is finished, the grooving treatment work of the underground continuous wall on the other side of the joint can be carried out, but in order to ensure that the water stopping device is not influenced by the grooving process of the underground continuous wall on the other side of the joint, the joint pipe plays a role in protection and cannot be pulled out, and after the grooving treatment of the underground continuous wall on the other side of the joint is finished, the joint pipe can be pulled out.
A combined water stop structure with multiple ribbed plates for an underground continuous wall comprises a multi-ribbed plate pipe, wherein each edge of the multi-ribbed plate pipe is connected with a ribbed plate, the ribbed plate is vertical to the connected plates, the outer end part of the ribbed plate is connected with an end plate, and H-shaped steel 104 is arranged in a cavity surrounded by the multi-ribbed plate pipe; and fine aggregate concrete is filled between the cavity surrounded by the multi-side plates and the H-shaped steel.
The invention has the further improvement that the section of the polygonal plate pipe is a regular hexagon, and a plurality of regular hexagons are connected by adding rib plates and end plates; the polygonal plate pipe is two, and H-shaped steel is arranged in the two polygonal plate pipes at least close to one side of the water seepage soil layer.
Compared with the prior art, the multilateral ribbed slab combined water stop structure of the underground continuous wall provided by the invention at least realizes the following beneficial effects:
the invention has good waterproof and anti-permeability effects. Meanwhile, as a support of a heavy object, the structure is a support of a grooving mechanical track and also bears loads of other construction equipment, and the safety and reliability are high.
Of course, it is not specifically necessary for any one product that implements the invention to achieve all of the above-described technical effects simultaneously.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
FIG. 1 is a schematic structural view of the present invention;
wherein, 101-polygonal plate tube; 102-a rib; 103-end plate; 104-H section steel.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
In the case of the example 1, the following examples are given,
as shown in fig. 1, a construction method of a multilateral ribbed slab combined water stop structure of an underground continuous wall specifically includes the following steps:
a) excavating a groove and building a guide wall;
b) grooving the underground continuous wall on one side of the joint: the trenching machine excavates the underground diaphragm wall groove section at one side of the joint along the guide wall, the excavated groove section of each underground diaphragm wall is 6m, slurry wall protection treatment is carried out in the excavating process, and two ends of each unit groove section are excavated firstly, and then the middle part is excavated; the trenching machine enlarges and excavates according to the 120mm of the guide wall enlarged end at the joint, ensures that slurry is full and avoids hole collapse;
c) removing sludge and residues at the bottom of the tank;
d) hoisting a joint pipe: the joint pipe is a rectangular joint pipe;
e) hoisting a reinforcement cage;
f) hanging a water stopping device; the water stopping device is hung in the center of the joint, after the water stopping device sinks to be in place, a steel base plate is placed on the top of the water stopping device, the water stopping device is slowly pressed down in a static pressure mode, at least the whole water stopping device is pressed down by 500mm, and after the water stopping device is completely pressed down, the top of the steel reinforcement cage is fixed with the water stopping device through a welding method; the water stopping device is a multi-edge ribbed plate stiffened steel pipe concrete water stopping structure;
g) a guide pipe is arranged, and concrete is poured underwater;
h) inserting H-shaped steel into the water stopping device, and pouring fine aggregate concrete;
i) grooving the underground continuous wall on the other side of the joint;
j) pulling out the joint pipe;
m) circulating the steps d) to j) until the construction of the whole underground continuous wall is completed.
Based on the above embodiment, in the step a), when the trench of the underground diaphragm wall is excavated, the soil near the ground surface is very unstable and easily collapses, and the slurry cannot function as a retaining wall, so that the guide wall functions as a retaining wall before the unit trench section is excavated. In the step b), the trenching machine excavates the underground diaphragm wall groove section on one side of the joint along the guide wall, the trenched groove section of each underground diaphragm wall is 6m, slurry is fed into the trenching process to protect the wall, and the two ends of each unit groove section are firstly excavated, and then the middle part is excavated. At the seam of each adjacent channel section during the grooving process. In the step d), the joint pipes designed by the combined type water stopping structure with the multilateral ribbed plates of the underground continuous wall are different from those designed by the traditional construction of the underground continuous wall, the joint pipes used by the combined type water stopping structure with the multilateral ribbed plates of the underground continuous wall only serve as the soil retaining function before the next groove section is excavated, the protection of the water stopping device before the concrete of the next groove section is ensured, the concrete pouring work of the diaphragm walls of the two adjacent groove sections can be in seamless butt joint at the water stopping device, and the water stopping strength is improved. Therefore, the joint pipe adopted by the design adopts a rectangular joint pipe which is formed by rolling a steel plate.
To further explain the embodiment, it should be noted that, in step a), the depth of the guide wall is 1500mm, and the top of the guide wall is 100mm higher than the ground; at the joint of the diaphragm wall, the design width of the guide wall is 120mm larger than that of each of two sides of the diaphragm wall. Based on this embodiment, in order to guarantee the basic size requirement of diaphragm wall construction and the validity of seam sealing device construction, at first carry out the slot excavation, and carry out the building work of leading the wall, lead the wall degree of depth design and be 1500mm, lead the wall top and need be higher than design ground 100 mm. At the joint of the diaphragm wall, the design width of the guide wall is 120mm larger than that of each of two sides of the diaphragm wall, and the diaphragm wall construction water stopping device is mainly considered to be respectively expanded towards two sides at the joint, particularly towards one side of a soil layer.
To explain the embodiment further, it should be noted that, in the step c), after the underground continuous wall on the joint side is grooved, the cleaning work of the sludge and the residue at the groove bottom is performed in time, especially the requirement of the design size is ensured at the enlarged end of the joint, and the detection of the indexes such as the grooving depth and the verticality is performed in time, so as to ensure that the groove depth is not less than the design depth, and the thickness of the residue is not more than 80 mm.
For further explanation of the embodiment, it should be noted that, in the step e), the steel reinforcement cage is hoisted into the disposable integral hoisting groove by adopting 50t of auxiliary hoist in cooperation with 150t of main hoist; a safe interval of 100mm is reserved at the water stopping device, and the length of each section of the steel reinforcement cage is 200mm smaller than that of the corresponding groove section.
For further explanation of the embodiment, it should be noted that, in the step f), after the steel reinforcement cage is completely suspended and fixed, the combined water stopping structure of the multilateral ribbed plates of the underground continuous wall is suspended, and the water stopping device is suspended in the center of the joint; the length of the water stopping device exceeds the depth of the diaphragm wall by 500 mm-800 mm, the water stopping device is integrally vertical and slowly hung at a designed position, after the water stopping device is sunk to be in place, a steel base plate is placed at the top of the water stopping device, the water stopping device is slowly pressed down in a static pressure mode, the water stopping device is integrally pressed down by 500mm at least, the water stopping device is completely pressed down, and a steel reinforcement cage is fixed with the water stopping device at the top of the steel reinforcement cage by adopting a welding method.
To explain the embodiment further, it should be noted that, in the step g), after the reinforcement cage and the water stop device are hoisted and fixed, the guide pipes are lowered to perform underwater concrete pouring, concrete is poured symmetrically by using the two guide pipes, and during the underwater concrete pouring process, the displaced slurry is processed in time, the concrete pouring speed of the two guide pipes is effectively controlled, and the concrete pouring height difference at the two sides is controlled until the concrete pouring is finished.
To explain the embodiment further, it should be noted that, in the step H), after the concrete is poured underwater, the depth of the underground continuous wall exceeds 12m, the H-shaped steel may be inserted into the pipe pile of the water stopping device on the side close to the permeable soil layer, and the concrete may be poured directly into the pipe pile of the water stopping device on the side far away from the permeable soil layer without inserting the H-shaped steel;
when the depth of the underground diaphragm wall exceeds 18m, inserting H-shaped steel into the pipe piles of the water stopping device, inserting H-shaped steel into two symmetrical pipe piles of the water stopping device, and pouring concrete.
To explain the embodiment further, it should be noted that, in step i), after the underground continuous wall on one side of the joint is completely constructed, the grooving treatment of the underground continuous wall on the other side of the joint can be performed, but in order to ensure that the water stopping device is not affected by the grooving process of the underground continuous wall on the other side of the joint, the joint pipe at this time has a protective effect and cannot be pulled out, and after the grooving treatment of the underground continuous wall on the other side of the joint is completed, the joint pipe can be pulled out.
In the case of the example 2, the following examples are given,
on the basis of embodiment 1, as shown in fig. 1, a combined water stop structure with multiple ribbed plates for an underground continuous wall comprises a multi-ribbed plate pipe 101, wherein each edge of the multi-ribbed plate pipe 101 is connected with a ribbed plate 102, the ribbed plate 102 is vertical to the connected plate, the outer end part of the ribbed plate 102 is connected with an end plate 103, and a cavity surrounded by the multi-ribbed plate pipe 101 is internally provided with H-shaped steel 104; and fine aggregate concrete is filled between a cavity enclosed by the polygonal plates 1 and the H-shaped steel 4.
The invention is further improved in that the section of the polygonal plate pipe 101 is a regular hexagon, and a plurality of regular hexagons are connected through adding the rib plates 102 and the end plates 103; the number of the polygonal plate pipes 101 is two, and H-shaped steel 104 is arranged in the two polygonal plate pipes 101 at least on one side close to the water seepage soil layer.
Based on the above embodiment, when there is the underground infiltration in the diaphragm wall periphery, in case enter into the concrete of seam crossing, because the setting of sealing device, the underground infiltration can be stopped in the contained angle that floor and multilateral board pipe 101 enclose. Compared with the traditional structure, the invention improves the water stopping strength and has good waterproof effect.
According to the embodiment, the combined water stop structure with the multi-side ribbed plates for the underground continuous wall, provided by the invention, at least has the following beneficial effects:
the invention has good waterproof and anti-permeability effects. Meanwhile, as a support of a heavy object, the structure is a support of a grooving mechanical track and also bears loads of other construction equipment, and the safety and reliability are high.
Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.
Claims (10)
1. A multilateral ribbed slab combined water stop structure of an underground continuous wall is characterized in that,
the steel plate comprises a multi-edge plate pipe (101), each edge of the multi-edge plate pipe (101) is connected with a rib plate (102), the rib plate (102) is perpendicular to the connected plates, the outer end part of the rib plate (102) is connected with an end plate (103), and H-shaped steel (104) is arranged in a cavity surrounded by the multi-edge plate pipe (101);
fine aggregate concrete is filled between a cavity defined by the polygonal plates (1) and the H-shaped steel (4);
the polygonal plates (101) are regular hexagons, and the regular hexagons are connected through additional ribbed plates (102) and end plates (103).
2. The multilateral ribbed slab combined water stop structure of an underground continuous wall according to claim 1,
the cross section of the polygonal plate pipe (101) is a regular hexagon, and a plurality of regular hexagons are connected through adding rib plates (102) and end plates (103);
the number of the polygonal plate pipes (101) is two, and H-shaped steel (104) are arranged in the two polygonal plate pipes (101) at least on one side close to the water seepage soil layer.
3. The construction method of the underground continuous wall multi-side ribbed plate combined water stop structure according to claim 1, characterized by comprising the following steps:
a) excavating a groove and building a guide wall;
b) grooving the underground continuous wall on one side of the joint: the trenching machine excavates the underground diaphragm wall groove section at one side of the joint along the guide wall, the excavated groove section of each underground diaphragm wall is 6m, slurry wall protection treatment is carried out in the excavating process, and two ends of each unit groove section are excavated firstly, and then the middle part is excavated; the trenching machine enlarges and excavates according to the 120mm of the guide wall enlarged end at the joint, ensures that slurry is full and avoids hole collapse;
c) removing sludge and residues at the bottom of the tank;
d) hoisting a joint pipe: the joint pipe is a rectangular joint pipe;
e) hoisting a reinforcement cage;
f) hanging a water stopping device; the water stopping device is hung in the center of the joint, after the water stopping device sinks to be in place, a steel base plate is placed on the top of the water stopping device, the water stopping device is slowly pressed down in a static pressure mode, at least the whole water stopping device is pressed down by 500mm, and after the water stopping device is completely pressed down, the top of the steel reinforcement cage is fixed with the water stopping device through a welding method; the water stopping device is a multi-edge ribbed plate stiffened steel pipe concrete water stopping structure;
g) a guide pipe is arranged, and concrete is poured underwater;
h) inserting H-shaped steel into the water stopping device, and pouring fine aggregate concrete;
i) grooving the underground continuous wall on the other side of the joint;
j) pulling out the joint pipe;
m) circulating the steps (d) to (j) until the construction of the whole underground continuous wall is completed.
4. The construction method of the multilateral ribbed slab combined water stop structure of the underground continuous wall according to claim 3,
in the step a), the depth of the guide wall is 1500mm, and the top of the guide wall is 100mm higher than the ground;
at the joint of the diaphragm wall, the design width of the guide wall is 120mm larger than that of each of two sides of the diaphragm wall.
5. The multilateral ribbed slab combined water stop structure of an underground continuous wall according to claim 3,
in the step c), after the underground continuous wall on one side of the joint is grooved, cleaning work of sludge and residues at the bottom of the groove is carried out in time, especially the requirement of design size is ensured at the expanded end of the joint, and the indexes of grooving depth, verticality and the like are detected in time, so that the groove depth is not less than the design depth, and the sediment thickness is not more than 80 mm.
6. The multilateral ribbed slab combined water stop structure of an underground continuous wall according to claim 3,
in the step e), a 50t auxiliary crane is matched with a 150t main crane to hoist the steel reinforcement cage into a disposable integral hoisting groove; a safe interval of 100mm is reserved at the water stopping device, and the length of each section of the steel reinforcement cage is 200mm smaller than that of the corresponding groove section.
7. The multilateral ribbed slab combined water stop structure of an underground continuous wall according to claim 3,
in the step f), after the steel reinforcement cage is completely hoisted and fixed, hoisting of a multi-side ribbed plate stiffened concrete-filled steel tube water stop structure is carried out, and a water stop device is hoisted in the center of a joint;
the length of the water stopping device exceeds the depth of the diaphragm wall by 500 mm-800 mm, the water stopping device is integrally vertical and slowly hung at a designed position, after the water stopping device is sunk to be in place, a steel base plate is placed at the top of the water stopping device, the water stopping device is slowly pressed down in a static pressure mode, the water stopping device is integrally pressed down by 500mm at least, the water stopping device is completely pressed down, and a steel reinforcement cage is fixed with the water stopping device at the top of the steel reinforcement cage by adopting a welding method.
8. The multilateral ribbed slab combined water stop structure of an underground continuous wall according to claim 3,
in the step g), after the reinforcement cage and the water stop device are hoisted and fixed, the guide pipes are lowered to pour concrete underwater, the two guide pipes are adopted to pour concrete symmetrically, the replaced slurry is processed in time in the process of pouring concrete underwater, the concrete pouring speed of the two guide pipes is effectively controlled, and the concrete pouring height difference at two sides is controlled until the concrete pouring is finished.
9. The multilateral ribbed slab combined water stop structure of an underground continuous wall according to claim 3,
in the step H), after the underwater concrete pouring is finished, the depth of the underground continuous wall exceeds 12m, the H-shaped steel can be inserted into the water stopping device pipe pile close to one side of the water seepage soil layer, and the H-shaped steel can not be inserted into the water stopping device pipe pile far away from one side of the water seepage soil layer, so that the concrete is directly poured;
when the depth of the underground diaphragm wall exceeds 18m, inserting H-shaped steel into the pipe piles of the water stopping device, inserting H-shaped steel into two symmetrical pipe piles of the water stopping device, and pouring concrete.
10. The multilateral ribbed slab combined water stop structure of an underground continuous wall according to claim 3,
in the step i), after the underground continuous wall on one side of the joint is constructed, grooving treatment work can be carried out on the underground continuous wall on the other side of the joint, but in order to ensure that the water stopping device is not influenced by the grooving process of the underground continuous wall on the other side of the joint, the joint pipe can not be pulled out due to the protection effect of the joint pipe, and after the grooving treatment of the underground continuous wall on the other side of the joint is finished, the joint pipe can be pulled out.
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| CN202110198117.5A CN113026722B (en) | 2021-02-22 | 2021-02-22 | Combined water stop structure with multilateral ribbed plates for underground continuous wall and construction method |
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Citations (6)
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| CN211948373U (en) * | 2020-01-15 | 2020-11-17 | 中铁第四勘察设计院集团有限公司 | Prefabricated underground continuous wall joint structure |
| WO2020244676A1 (en) * | 2019-11-27 | 2020-12-10 | 中铁九局集团有限公司 | Steel reinforcement cage for use in ventilation shaft diaphragm wall, and usage method |
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| CN110528501A (en) * | 2019-07-24 | 2019-12-03 | 青岛理工大学 | High rich water faces sea area diaphragm wall and connects sealing device |
| WO2020244676A1 (en) * | 2019-11-27 | 2020-12-10 | 中铁九局集团有限公司 | Steel reinforcement cage for use in ventilation shaft diaphragm wall, and usage method |
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Effective date of registration: 20230608 Address after: No. 999, Century Avenue, Tongzhou Development Zone, Nantong, Jiangsu 226300 Patentee after: Nantong Sijian Group Architectural Design Co.,Ltd. Address before: 226300 No. 999, New Century Avenue, Nantong hi tech Zone, Nantong City, Jiangsu Province Patentee before: NANTONG SIJIAN CONSTRUCTION GROUP Co.,Ltd. |