CN113026723B - Special-shaped ribbed plate combined water stop structure of underground continuous wall and construction method - Google Patents
Special-shaped ribbed plate combined water stop structure of underground continuous wall and construction method Download PDFInfo
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- CN113026723B CN113026723B CN202110198119.4A CN202110198119A CN113026723B CN 113026723 B CN113026723 B CN 113026723B CN 202110198119 A CN202110198119 A CN 202110198119A CN 113026723 B CN113026723 B CN 113026723B
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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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- 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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Abstract
The invention discloses a special ribbed plate combined water stop structure of an underground continuous wall, which comprises a polygonal tubular pile, wherein ribbed plates are symmetrically arranged on two sides of the polygonal tubular pile around a middle seam; h-shaped steel is arranged in a cavity surrounded by the polygonal tubular piles; fine aggregate concrete is filled between the cavity defined by the polygonal tubular piles and the H-shaped steel; at least three rib plates are arranged on two sides of the middle seam of the multilateral tubular pile; the polygonal tubular pile is connected with an H-shaped steel pile, and the H-shaped steel pile is arranged on the side of the groundwater seepage layer. The construction method comprises the following steps: a) 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) Driving H-shaped steel piles, f) driving special-shaped polygonal tubular piles; g) Cleaning the bottom of the tank for the second time; h) Hoisting a reinforcement cage; i) J) driving an H-shaped steel pile and pouring concrete; k) Grooving the underground continuous wall on the other side of the joint; m) pulling out the joint pipe, and n) circulating. The invention improves the safety coefficient and the water stopping strength.
Description
Technical Field
The invention relates to a special ribbed slab 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, a long and narrow deep groove is excavated under the condition of slurry wall protection 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 a conduit method to form a unit groove section, and the steps are carried out section by section, so that a continuous reinforced concrete wall is built 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 underground continuous wall's quality, 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 solve the defects in the prior art and provide the special-shaped ribbed slab combined water stop structure of the underground continuous wall and the construction method thereof, wherein the special-shaped ribbed slab combined water stop structure has good bearing capacity and good water stop effect.
The technical scheme is as follows: the invention relates to a special-shaped ribbed plate combined water stop structure of an underground continuous wall, which comprises a polygonal tubular pile, wherein ribbed plates are symmetrically arranged on two sides of the polygonal tubular pile around a middle seam;
the ribbed plate comprises a short plate and a long plate which are integrated, and the included angle between the short plate and the long plate is greater than or equal to 90 degrees; the outer end part of the long plate is connected with the end plate;
the polygonal tubular pile is in a regular hexagon shape, and H-shaped steel is arranged in a cavity defined by the polygonal tubular pile;
fine aggregate concrete is filled between the H-shaped steel and a cavity surrounded by the polygonal tubular piles;
at least three rib plates are arranged on two sides of the middle seam of the multilateral tubular pile;
the polygonal tubular pile is connected with an H-shaped steel pile, and the H-shaped steel pile is arranged on the side of the groundwater seepage layer.
The invention has the further improvement that the central line of the multilateral tubular pile is provided with an outer rib plate, and the end part of the outer rib plate is provided with an end plate; an open slot is formed in one side, facing the polygonal tubular pile, of the H-shaped steel pile; the polygonal tubular pile is connected with the H-shaped steel pile through an end plate at the end part of the outer rib plate at the side of the opening groove.
A construction method of a special-shaped ribbed slab combined water stop structure of an underground continuous wall comprises the following steps:
a) 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) H-shaped steel piles are arranged, after concrete is poured underwater, the H-shaped steel piles are arranged at the designed position of the water stopping device, the flange plate at one side of the H-shaped steel close to the water seepage soil layer is arranged within the expanded end of the joint within 100mm to 120mm, the end part of the flange plate at one side of the H-shaped steel far away from the water seepage soil layer is provided with a rectangular crack guide groove, steel bars are inserted into the rectangular crack guide groove before the H-shaped steel is arranged, and the problem that the rectangular crack guide groove is filled with soil in the H-shaped steel arranging process, so that rib plates of the water stopping device are arranged along the crack guide groove in the later period to be difficult is solved;
f) Drilling a special-shaped polygonal tubular pile;
g) Cleaning the bottom of the tank for the second time;
h) Hoisting a reinforcement cage;
i) A guide pipe is arranged, and concrete is poured underwater;
j) H-shaped steel piles are arranged in the polygonal special-shaped ribbed plate steel pipe piles in a driving mode, and concrete is poured;
k) Grooving the underground continuous wall on the other side of the joint;
m) pulling out the joint pipe;
and n) circulating the steps d) to m) 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 two sides of the diaphragm wall.
The invention further improves that in the step b), the underground continuous wall on one side of the joint is processed by grooving; the trenching machine excavates the underground diaphragm wall groove section on 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. And in the grooving process, at the joint of each adjacent groove section, the grooving machine enlarges and excavates according to the 120mm enlarged end of the guide wall at the joint, ensures that slurry is full and avoids hole collapse.
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, the requirement of the design size is ensured at the expanded end of the joint, the detection of the grooving depth and the verticality index is carried out in time, the groove depth is not less than the design depth, and the sediment thickness is not more than 80mm.
The invention is further improved in that in the step d), the joint pipe is a rectangular joint pipe which is formed by rolling a steel plate.
The invention has the further improvement that in the step f), after the H-shaped steel pile is driven, steel bars in the rectangular crack guide groove are drawn out, the polygonal special-shaped ribbed plate steel pipe pile is hoisted, the formulated ribbed plates of the polygonal special-shaped ribbed plate steel pipe pile are centered on the crack guide groove and slowly sink down, so that the polygonal special-shaped ribbed plate steel pipe pile is accurately positioned along the crack guide groove, and the H-shaped steel and the polygonal special-shaped ribbed plate steel pipe pile are butted in site.
The invention has the further improvement that in the step h), the reinforcement cage is hoisted; 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; the length of each section of the steel reinforcement cage is 200mm smaller than that of the corresponding groove section, and the safety interval of 100mm is mainly considered to be reserved at the water stopping device, so that the water stopping device can be conveniently hung and arranged in the following process, and the steel reinforcement cage can be guaranteed to vertically and slowly sink in the hanging process.
The invention is further improved in that in the step i), 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, displaced 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.
The invention has the further improvement that in the step j), after the concrete is poured underwater, the depth of the underground continuous wall exceeds 12m, H-shaped steel is inserted into the pipe pile of the water stopping device, and fine stone concrete is poured, so that the H-shaped steel can be inserted into the pipe pile of the water stopping device at one side close to the permeable soil layer, and the H-shaped steel can be directly poured into the pipe pile of the water stopping device at one side far away from the permeable soil layer without being inserted; when the depth of the underground continuous wall exceeds 18m, inserting H-shaped steel into the pipe piles of the water stop device, and pouring fine aggregate concrete, namely, inserting H-shaped steel into two symmetrical pipe piles of the water stop device, and pouring concrete.
The invention further improves that in the step k), the underground continuous wall on the other side of the joint is processed by grooving; and 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 plays a role in protection and cannot be pulled out, and the joint pipe can be pulled out after the grooving treatment of the underground continuous wall on the other side of the joint is finished.
Compared with the prior art, the construction method of the special-shaped ribbed plate combined water stop structure of the underground continuous wall at least has the following beneficial effects that:
the invention has good waterproof and anti-permeability effects. Meanwhile, as the support of a heavy object, the structure is not only the support of the mechanical track of the digging groove, but also bears the load of other construction equipment, and has high safety and reliability.
Of course, it is not specifically necessary for any one product in which the present invention is practiced to achieve all of the above 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 view of the structure of the present invention;
wherein, 101-multilateral tubular pile; 102-a rib; 103-end plate; 104-H section steel; 111-short plates; 112-long plate; 3-H-shaped steel piles; 301-open slot.
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 it is 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 one 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, it need not be discussed further in subsequent figures.
In the case of the example 1, the following examples are given,
as shown in fig. 1, a special-shaped ribbed plate combined water stop structure for an underground continuous wall comprises a polygonal tubular pile 101, wherein ribbed plates 102 are symmetrically arranged on two sides of the polygonal tubular pile 101 about a center seam;
the rib plate 102 comprises a short plate 111 and a long plate 112, the short plate 111 and the long plate 112 are of an integral structure, and an included angle between the short plate 111 and the long plate 112 is greater than or equal to 90 degrees; the outer end of the long plate 112 is connected with the end plate 103;
the polygonal tubular pile 101 is in a regular hexagon shape, and H-shaped steel 104 is arranged in a cavity defined by the polygonal tubular pile 101;
fine aggregate concrete is filled between a cavity surrounded by the polygonal tubular piles 101 and the H-shaped steel 104;
at least three rib plates 102 are arranged on two sides of the middle seam of the polygonal tubular pile 101;
the polygonal tubular pile 101 is connected with the H-shaped steel pile 3, and the H-shaped steel pile 3 is arranged on the groundwater seepage layer side.
Based on the above embodiment, the polygonal tubular pile 101 and the rib plate 102 form a spider-like shape. Specifically, each side of the regular hexagon on both sides of the center slit is connected to the rib plate 102.
For further explaining the present embodiment, it should be noted that an outer rib plate is arranged on the center line of the polygonal pipe pile 101, and an end plate 103 is arranged at the end of the outer rib plate; an open slot 301 is formed in one side, facing the polygonal tubular pile 101, of the H-shaped steel pile 3; the polygonal pipe pile 101 is connected with the H-shaped steel pile 3 through the end plate 103 at the end of the outer rib plate on the side of the opening groove 301.
Based on the above embodiment, when underground water seepage exists in the periphery of the diaphragm wall, once the diaphragm wall enters the concrete at the joint, the underground water seepage is firstly blocked and drained by the H-shaped steel pile 3 and enters an included angle formed by a rib plate formed by the surrounding of the short plate 111 and the long plate 112 and the polygonal plate pipe 101 through the arrangement of the combined pile water stopping structure. Compared with the traditional structure, the invention improves the water stopping strength and has good waterproof effect. The invention has good waterproof and anti-permeability effects. Meanwhile, as the support of a heavy object, the structure is not only the support of the mechanical track of the digging groove, but also bears the load of other construction equipment, and has high safety and reliability.
In the case of the example 2, the following examples are given,
as shown in fig. 1, a construction method of a special-shaped ribbed slab combined water stop structure of an underground continuous wall comprises the following steps:
a) Building a guide wall: in order to ensure the basic size requirement of the diaphragm wall construction and the effectiveness of the joint water stop device construction, firstly, groove excavation is carried out, and the construction work of the guide wall is carried out, wherein the depth of the guide wall is designed to be 1500mm, and the top of the guide wall is 100mm higher than the designed 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, and the expansion of the diaphragm wall construction water stopping device at the joint to two sides, especially to one side of a soil layer, is mainly considered;
b) Grooving treatment of the underground diaphragm 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; after the underground continuous wall on one side of the joint is grooved, timely cleaning of sludge and residues at the bottom of the groove is carried out, the requirement on design size is guaranteed at the expanded end of the joint, the detection of indexes such as grooving depth, verticality and the like is carried out timely, the groove depth is not less than the design depth, and the sediment thickness is not more than 80mm;
d) Hoisting a joint pipe: the joint pipe is a rectangular joint pipe; the joint pipe of the special-shaped polygonal ribbed plate stiffened steel pipe concrete composite pile water stop structure is different from the traditional diaphragm wall construction, the joint pipe used by the special-shaped ribbed plate combined water stop structure of the polygonal diaphragm wall only has the function of retaining soil before the next groove section is excavated, and the protection of the water stop device before the concrete pouring of the next groove section is ensured, so that the concrete pouring work of the diaphragm wall of the two adjacent groove sections can be in seamless butt joint at the water stop device, and the water stop strength is improved. Therefore, the adopted joint pipe is a rectangular joint pipe which is formed by rolling a steel plate;
e) H-shaped steel piles are arranged, after concrete is poured underwater, the H-shaped steel piles are arranged at the designed position of the water stopping device, the flange plate at one side of the H-shaped steel close to the water seepage soil layer is arranged within the expanded end of the joint within 100mm to 120mm, the end part of the flange plate at one side of the H-shaped steel far away from the water seepage soil layer is provided with a rectangular crack guide groove, steel bars are inserted into the rectangular crack guide groove before the H-shaped steel is arranged, and the problem that the rectangular crack guide groove is filled with soil in the H-shaped steel arranging process, so that rib plates of the water stopping device are arranged along the crack guide groove in the later period to be difficult is solved;
f) After the H-shaped steel pile is driven, drawing steel bars out of the rectangular crack guide groove, lifting the polygonal special-shaped ribbed plate steel pipe pile, centering the manufactured ribbed plates of the polygonal special-shaped ribbed plate steel pipe pile in the crack guide groove, and slowly sinking to enable the polygonal special-shaped ribbed plate steel pipe pile to accurately position along the crack guide groove, so that the H-shaped steel and the polygonal special-shaped ribbed plate steel pipe pile are in butt joint on site;
g) Secondary cleaning of the tank bottom: after the whole water stopping device is completely hung, performing secondary tank bottom cleaning work before the steel reinforcement cage is hung;
h) Hoisting a steel reinforcement cage: the steel reinforcement cage is hoisted into the groove by adopting a 50t auxiliary crane matched with a 150t main crane to lift the whole body once. The length of each section of the steel reinforcement cage is 200mm smaller than that of the corresponding groove section, and the safety interval of 100mm is mainly considered to be reserved at the water stopping device, so that the water stopping device can be conveniently hung and erected in the following process, and the steel reinforcement cage can be ensured to vertically and slowly sink in the hanging and placing process;
i) Lower guide pipe, concrete pouring under water: after the reinforcement cage and the water stopping device are hung and fixed, the guide pipes are lowered to carry out underwater concrete pouring, the two guide pipes are adopted to symmetrically pour concrete, the displaced slurry is processed in time in the process of underwater concrete pouring, 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;
j) H-shaped steel piles are arranged in the polygonal special-shaped ribbed plate steel pipe piles in a driving mode, and concrete is poured: when the underground diaphragm wall degree of depth surpasses 12m, adopt to insert H shaped steel in sealing device tubular pile to the fine aggregate concrete fills, can only insert H shaped steel in the sealing device tubular pile that is close to infiltration soil layer one side, and can not insert H shaped steel in the sealing device tubular pile of keeping away from infiltration soil layer one side, directly fills the concrete. When the depth of the underground continuous wall exceeds 18m, inserting H-shaped steel into the pipe piles of the water stop device, and pouring fine aggregate concrete, namely inserting H-shaped steel into two symmetrical pipe piles of the water stop device, and pouring concrete;
k) And (3) grooving the underground continuous wall on the other side of the joint: after the construction of the underground continuous wall on one side of the joint is finished, 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 plays a role in protection and cannot be pulled out at the moment, and the joint pipe can be pulled out after the grooving treatment of the underground continuous wall on the other side of the joint is finished;
m) pulling out the joint pipe;
n) circulating the step d) to the step m) until the construction of the whole underground continuous wall is completed.
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 special ribbed slab combined water stop structure of an underground continuous wall is characterized in that,
the pipe pile comprises a multilateral pipe pile (101), wherein rib plates (102) are symmetrically arranged on two sides of the multilateral pipe pile (101) relative to a middle seam;
the rib plate (102) comprises a short plate (111) and a long plate (112), the short plate (111) and the long plate (112) are of an integral structure, and an included angle between the short plate (111) and the long plate (112) is larger than or equal to 90 degrees; the outer end part of the long plate (112) is connected with the end plate (103);
the polygonal tubular pile (101) is in a regular hexagon shape, and H-shaped steel (104) is arranged in a cavity surrounded by the polygonal tubular pile (101);
fine aggregate concrete is filled between a cavity defined by the polygonal tubular piles (101) and the H-shaped steel (104);
at least three rib plates (102) are arranged on two sides of the middle seam of the polygonal tubular pile (101);
the multilateral tubular pile (101) is connected with the H-shaped steel pile (3), and the H-shaped steel pile (3) is arranged on the side of the groundwater seepage layer.
2. The profiled ribbed slab combined water stop structure of the underground continuous wall as claimed in claim 1,
an outer rib plate is arranged on the center line of the polygonal tubular pile (101), and an end plate (103) is arranged at the end part of the outer rib plate;
an open slot (301) is formed in one side, facing the polygonal tubular pile (101), of the H-shaped steel pile (3);
the polygonal tubular pile (101) is connected with the H-shaped steel pile (3) through an end plate (103) at the end part of an outer rib plate at the side of the opening groove (301).
3. The construction method of the special-shaped ribbed plate combined type water stop structure of the underground continuous wall as claimed in claim 1, is characterized by comprising the following steps of:
a) Building a guide wall;
b) Grooving treatment of the underground diaphragm 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) H-shaped steel piles are arranged, after concrete is poured underwater, the H-shaped steel piles are arranged at the designed position of the water stopping device, the flange plate at one side of the H-shaped steel close to the water seepage soil layer is arranged within the expanded end of the joint within 100mm to 120mm, the end part of the flange plate at one side of the H-shaped steel far away from the water seepage soil layer is provided with a rectangular crack guide groove, steel bars are inserted into the rectangular crack guide groove before the H-shaped steel is arranged, and the problem that the rectangular crack guide groove is filled with soil in the H-shaped steel arranging process, so that rib plates of the water stopping device are arranged along the crack guide groove in the later period to be difficult is solved;
f) Arranging special-shaped polygonal tubular piles (101);
g) Cleaning the bottom of the tank for the second time;
h) Hoisting a reinforcement cage;
i) A guide pipe is arranged, and concrete is poured underwater;
j) H-shaped steel piles are arranged in the polygonal special-shaped ribbed plate steel pipe piles in a driving mode, and concrete is poured;
k) Grooving the underground continuous wall on the other side of the joint;
m) pulling out the joint pipe;
and n) circulating the steps d) to m) until the construction of the whole underground continuous wall is completed.
4. The construction method of the special-shaped ribbed plate 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 two sides of the diaphragm wall.
5. The construction method of the underground continuous wall special-shaped ribbed plate combined type water stop structure as claimed in 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, the requirement of design size is ensured at the expanded end of the joint, the detection of the grooving depth and the verticality index is carried out in time, the groove depth is not less than the design depth, and the sediment thickness is not more than 80mm.
6. The construction method of the special-shaped ribbed plate combined water stop structure of the underground continuous wall according to claim 3,
in the step d), the joint pipe is a rectangular joint pipe formed by rolling a steel plate.
7. The construction method of the special-shaped ribbed plate combined water stop structure of the underground continuous wall according to claim 3,
and in the step f), after the H-shaped steel pile is driven, pulling out steel bars in the rectangular crack guide groove, lifting the polygonal special-shaped ribbed plate steel pipe pile, centering the formed ribbed plates of the polygonal special-shaped ribbed plate steel pipe pile in the crack guide groove, and slowly sinking to enable the polygonal special-shaped ribbed plate steel pipe pile to accurately position along the crack guide groove, so that the H-shaped steel and the polygonal special-shaped ribbed plate steel pipe pile are in butt joint on site.
8. The construction method of the special-shaped ribbed plate combined water stop structure of the underground continuous wall according to claim 3,
in the step h), hoisting a reinforcement cage; 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; the length of each section of the steel reinforcement cage is 200mm smaller than that of the corresponding groove section, and the safety interval of 100mm is mainly considered to be reserved at the water stopping device, so that the water stopping device can be conveniently hung and arranged in the following process, and the steel reinforcement cage can be guaranteed to vertically and slowly sink in the hanging process.
9. The construction method of the underground continuous wall special-shaped ribbed plate combined type water stop structure as claimed in claim 3,
in the step i), after the reinforcement cage and the water stop device are hung 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.
10. The construction method of the special-shaped ribbed plate combined water stop structure of the underground continuous wall according to claim 3,
in the step j), after the underwater concrete pouring is finished, the depth of the underground continuous wall exceeds 12m, H-shaped steel is inserted into the pipe pile of the water stopping device, and fine stone concrete is poured, so that the H-shaped steel can be inserted into the pipe pile of the water stopping device at one side close to the permeable soil layer, the H-shaped steel can not be inserted into the pipe pile of the water stopping device at one side far away from the permeable soil layer, and the concrete is directly poured; when the depth of the underground continuous wall exceeds 18m, inserting H-shaped steel into the pipe piles of the water stopping device and pouring fine aggregate concrete, namely inserting H-shaped steel into two symmetrical pipe piles of the water stopping device and pouring concrete.
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| BE901322A (en) * | 1984-12-20 | 1985-04-16 | Remortel Luc Van | Sealing join for underground concrete mud wall sections - uses hose fixed in first section and expanded before pouring second to extend connector |
| JP4174359B2 (en) * | 2003-03-25 | 2008-10-29 | 株式会社熊谷組 | Water stop connection structure between members |
| CN201103127Y (en) * | 2007-08-24 | 2008-08-20 | 上海外高桥地质工程有限公司 | Water stop locking notch tube of underground continuous wall |
| CN101608447A (en) * | 2009-07-10 | 2009-12-23 | 上海隧道工程股份有限公司 | A kind of cross steel plate water-stopping joint continuous concrete wall and joint construction method thereof |
| CN201554042U (en) * | 2009-10-23 | 2010-08-18 | 广东省基础工程公司 | Installer for diaphragm wall connector flexible water stops |
| CN102296637A (en) * | 2011-06-13 | 2011-12-28 | 华南理工大学 | Seepage-proofing joint device of diaphragm wall |
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2021
- 2021-02-22 CN CN202110198119.4A patent/CN113026723B/en active Active
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