CN111851468B - Underground water soil steel wall continuous inserting verticality control construction method - Google Patents
Underground water soil steel wall continuous inserting verticality control construction method Download PDFInfo
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- CN111851468B CN111851468B CN202010736069.6A CN202010736069A CN111851468B CN 111851468 B CN111851468 B CN 111851468B CN 202010736069 A CN202010736069 A CN 202010736069A CN 111851468 B CN111851468 B CN 111851468B
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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
- 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
- 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 relates to a construction method for controlling the continuous inserting verticality of an underground water soil steel wall, which comprises the following steps: (1) constructing a guide wall; (2) constructing a cement-soil wall; (3) installing a guide frame; (4) positioning section steel construction; (5) installing a lock catch protective sleeve rod; (6) continuously splicing the lock catch section steel; (7) and (4) shifting, constructing the next groove section, and repeating the steps (1) to (7) to form the underground continuous enclosure. The invention adopts the guide control of the guide frame and the positioning section steel and combines the real-time vertical and locking control of the continuous splicing process of the lock catch section steel. The verticality control and the construction quality in the construction process of the underground cement-soil continuous steel wall are ensured. Meanwhile, the invention can well solve the problems of narrow construction space, high work efficiency requirement, high construction difficulty and high verticality control requirement by adopting the customized section steel splicing connection construction, and has great advantages in construction in downtown areas and complex environments.
Description
Technical Field
The invention relates to a construction method for foundation pit engineering enclosure, in particular to a construction method for controlling the continuous inserting verticality of an underground water soil steel wall.
Background
In recent years, the infrastructure construction of China is developed rapidly, and particularly in cities, the construction of China is gradually developing to three-dimensional space in the air, the ground and the underground. At present, foundation pit engineering is the most direct and effective method for forming underground space, and is widely applied to the fields of urban building engineering, subway engineering, traffic engineering and the like. With the development of underground space, the excavation depth of the foundation pit is also continuously increased. The deep foundation pit is located in the urban area, surrounding buildings are various, roads are staggered, underground pipelines are distributed vertically and horizontally, stricter and more complex technical requirements are provided for deep foundation pit supporting engineering, the stability of a supporting structure is ensured, and the requirement of deformation control must be met. The deep foundation pit engineering shows the trends of deep depth, large scale, more conditions and small deformation. The conventional enclosure for foundation pit engineering comprises steel sheet piles (shallow to deep in combination with the excavation depth of a foundation pit), piles in an SMW (soil mixing wall) construction method, cast-in-situ bored piles, waterproof curtains, underground continuous walls and the like.
The underground continuous wall is used as a common form of a foundation pit supporting structure, has the advantages of integrating soil retaining, bearing and seepage prevention, can be applied to large foundation pits with complex geological conditions, and particularly is widely applied along with the development of urban subway engineering in China.
However, the existing urban foundation pit supporting engineering is limited by factors such as construction site, construction speed and the like, the conflict between the existing urban foundation pit supporting engineering and urban traffic and the surrounding environment is increasingly serious, and the manufacturing and installation of the reinforcing steel bars are control links playing an important role in the construction speed, the floor area, the net height requirement and the influence of the environment on the foundation pit supporting structure. Traditional enclosure and ground wall construction mechanical equipment, steel reinforcement cage manufacturing and installation, background system occupy land and reach, and the headroom requirement is high. The method is often a limiting factor for construction in downtown areas and low-headroom environments. Therefore, a containment technical measure which has the advantages of smaller occupied area, low requirement on clearance, quick construction and less influence on the environment needs to be found.
At present, the retaining form of combining the customized lock catch profile steel with the cement soil is characterized in that the cement of the underground soil continuous steel wall replaces the concrete in the original ground wall, the profile steel replaces the reinforcing steel, the installation is convenient, the manufacturing cost is lower, and the material cost is favorably reduced. Meanwhile, the difficult problems of narrow construction space, high work efficiency requirement and large construction difficulty can be well solved by adopting the customized section steel segment splicing connection construction. But the timing lock catch continuous steel is inserted into the cement soil wall, and a plurality of units are needed to be spliced and connected. The verticality control is a key in the construction process, if the section steel is not well inserted verticality, the deviation is larger and larger along with the continuous insertion of the subsequent section steel, and the enclosure and the lock catch are affected.
Disclosure of Invention
The invention provides a construction method for controlling the perpendicularity of an underground cement soil steel wall in a continuous inserting mode, which is used for ensuring the perpendicularity control and construction quality in the construction process of the underground cement soil continuous steel wall; meanwhile, the problems of narrow construction space, high work efficiency requirement, high construction difficulty and high verticality control requirement can be well solved by adopting customized section steel segment splicing connection construction, and the construction has great advantages in downtown areas and complex environments.
In order to achieve the purpose, the technical scheme of the invention is as follows: a construction method for controlling the continuous inserting verticality of an underground water soil steel wall comprises the following steps:
the first step is as follows: and (3) guide wall construction: before the underground cement soil wall is constructed into a wall, constructing a guide wall for guiding and positioning the underground cement soil wall and preventing the wall of the wall from collapsing, wherein the guide wall is of a cast-in-place reinforced concrete structure or a steel guide beam;
the second step is as follows: and (3) forming a cement-soil wall: after the guide wall is constructed, carrying out wall forming construction on the cement-soil wall, wherein CSM and TRD construction processes of the equal-thickness cement-soil wall are adopted for forming a groove on the cement-soil wall, so that the subsequent customized lock catch profile steel can be smoothly inserted under the dead weight, the verticality of the profile steel is controlled conveniently, and the water-cement ratio of cement paste is controlled to be 1.8-2.0;
the third step: installing a guide frame: inserting the continuous steel wall lock catch section steel, setting a guide frame with the height not lower than 2m when the section steel is transferred, guiding the section steel verticality when transferring through a guide frame guide system, and simultaneously adjusting the section steel verticality in real time according to the transfer verticality measurement feedback of each unit segment;
the fourth step: and (3) positioning section steel construction: the positioning section steel is constructed by matching a crane with a vertical guide frame, and after the positioning section steel is put in place in sections, the laying suspension beams are placed on the guide rail beams at the two sides to ensure the self-weight plumb bob state of the positioning section steel;
the fifth step: installing a lock catch protective sleeve:
a. assembling the protection rods together, placing the bottom section with the protection rod punch at the lowest part, and installing a protection rod hanging cylinder at the uppermost part;
b. hoisting the protective rod group and putting down;
c. after the upper end of the protection rod is lowered to the upper end of the female head of the section steel, the protection rod is placed by a protection rod placing device, and the protection rod hanging cylinder is taken down;
d. repeating a-b, lowering the second group of protection rods to a position suitable for connecting the upper protection rod group and the lower protection rod group, and connecting the protection rod groups;
e. after the protective rods are connected, hoisting the combined protective rod group upwards by a small section;
f. taking down the protective rod placing device, and continuously lowering the protective rod group;
g. repeating the steps c-f until the last group of protection rods are placed on the section steel by the protection rod placing device;
a sixth step: continuous locking and splicing of lock catch profile steel:
after the positioning section steel is fixed, the standard lock catch section steel is inserted in sequence; the section steel inserting, splicing and verticality mainly comprises the following steps:
(1) placing a bottom beam:
a. placing a section of initial section bottom beam at the corresponding position of the guide walls on the two sides of the groove width of the initial groove width section;
b. connecting n +1 sections of standard section bottom beams after the initial section bottom beams, wherein n is the number of the sections of the standard groove width excavated at the same time, and n is more than or equal to 1;
c. the bottom beam groups at two sides of the groove width are connected into a rectangular frame by using bottom beam connecting channel steel at two ends of the bottom beam group;
(2) installing a blocking wheel frame and a blocking wheel:
a. a longitudinal catch wheel is arranged on the bottom beam and connected by a bolt;
b. placing the wheel blocking frame, and clamping the wheel blocking frame and the bottom beam by using a tiger mouth clamp at four places of a supporting leg of the wheel blocking frame;
c. a transverse catch wheel is arranged on the catch wheel frame and connected by a bolt;
d. properly extending and retracting the catch wheel to ensure that the catch wheel is just positioned at the position for correctly guiding the section steel to be vertically lowered;
(3) inserting the section steel unit:
a. mounting a profile steel lifting lug at the upper end of the profile steel unit;
b. hoisting the section steel unit by using hoisting equipment, lowering the section steel unit to a certain height, penetrating a section steel web hole by using a section steel laying rod, laying the section steel unit, locking the section steel, and then taking down a section steel lifting lug;
(4) connecting upper and lower section steel units:
a. temporarily positioning the section steel connecting plate by using high-strength bolt connection, aligning hole positions of the connecting plate by using a punching nail, installing a torsional shear type high-strength bolt connection pair, and checking the screwing condition of the torsional shear type high-strength bolt connection pair to ensure no screwing leakage;
b. after the upper and lower section steel units are connected, integrally hoisting the connected section steel unit group upwards to form a small section, removing the section steel placing rod, continuously placing the section steel unit group integrally downwards, and placing the section steel unit group to a proper height;
c. repeating the steps (3) to (4) until the topmost section steel unit is locked by the section steel placing rod and the section steel lifting lug is taken down, so that the connected section steel units form a section steel group; during the pause construction, a protective rod needs to be inserted into the female heads on the outer sides of a group of section steel groups which are inserted and placed at last before the section steel is inserted and placed continuously every time, so that the lock catch is prevented from being blocked after slurry is injected into the female opening for final setting. When the section steel group with the built-in protective rod is required to be inserted, the next step after the step c is executed is to insert the protective rod, and the subsequent step (5) is continued after the protective rod is inserted;
(5) installation section steel suspender assembly
The steel section suspender assembly is hoisted to a height suitable for being connected with the steel section unit, the hoisting plate and the steel section web plate are connected by bolts, and the bolts are screwed tightly without loosening;
(6) locking the steel section:
a. hoisting the lifting lugs on the section steel boom assembly by the hoisting equipment, hoisting the section steel group and the section steel boom assembly for a short distance upwards together, and taking down the section steel laying rod;
c. continuing to lower until the placing beam of the section steel suspender assembly is placed on the bottom beam;
d. rotating the nut by using a rotating handle, adjusting the height of the suspender to keep the section steel group to be vertical and enable the upper end of the section steel group to be level with the upper ends of other section steel groups, and locking the section steel groups; after the group of section steel is inserted, mounting a wheel blocking frame and a wheel blocking frame to a position to be inserted of the next group of section steel, and continuously inserting the next group of section steel;
a seventh step of: and (3) shifting, and constructing the next groove section: and repeating the first step to the sixth step until the construction of the enclosure body is completed.
Further, in the fourth step: after the first positioning section steel is put down, in order to ensure the perpendicularity of subsequent section steel insertion, controlling the final setting and fixing of cement soil at the groove section of the first positioning section steel, and then, lowering the subsequent section steel; in order to ensure the lock catch connection between the section steels, a protective sleeve rod needs to be inserted into the female head of the first positioning section steel, and before the next section steel is placed down, the protective sleeve rod in the female head of the positioning section steel is pulled out, so that the condition that the lock catch connection cannot be carried out due to the fact that the female head is immersed into cement slurry and finally set is avoided.
The invention has the beneficial effects that: the guide frame and the positioning profile steel are adopted for guiding control, and the locking profile steel is combined with real-time vertical and locking control in the continuous splicing process. The verticality control and the construction quality in the construction process of the underground cement-soil continuous steel wall are ensured. Meanwhile, the invention can well solve the problems of narrow construction space, high work efficiency requirement, high construction difficulty and high verticality control requirement by adopting the customized section steel splicing connection construction, and has great advantages in construction in downtown areas and complex environments.
Drawings
FIG. 1 is a flow chart of the construction process of the present invention;
FIG. 2 is a schematic plan view of a cement-soil continuous steel wall
FIG. 3 is a schematic view of the lowering and guiding fixing of the positioning section steel;
wherein: (a) a front view, (b) a left sectional view, (c) a top sectional view;
FIG. 4 is a schematic view of the installation of the steel profile locking anti-sheathing rod;
FIG. 5 is a schematic view of the placement of the bottom beams;
wherein: (a) front view, (b) left cross-sectional view;
FIG. 6 is a schematic view of the mounting of the catch frame and catch wheel;
FIG. 7 is a schematic illustration of insertion of the section steel unit;
wherein: (a) front view, (b) left cross-sectional view;
FIG. 8 is a schematic view of joining upper and lower section steel units;
wherein: (a) front view, (b) left cross-sectional view;
FIG. 9 is a schematic view of an installation boom assembly element;
wherein: (a) front view, (b) left cross-sectional view;
FIG. 10 is a schematic view of a locking section steel set;
wherein: (a) front view, (b) left cross-sectional view;
FIG. 11 is a schematic view of the continuous insertion process of the locking section steel.
Detailed Description
The invention is further illustrated by the following specific examples in conjunction with the accompanying drawings.
As shown in fig. 1 to 11, a construction method for controlling the perpendicularity of a continuous inserting and setting underground soil-concrete steel wall comprises the following steps:
s1: and (3) guide wall construction: before the underground cement soil wall is constructed into a wall, a guide wall is preferably constructed and is mainly used for guiding and positioning the underground cement soil wall and preventing the wall of the wall from collapsing. The guide wall is mainly of a cast-in-place reinforced concrete structure, and can also be a steel guide beam for repeated use.
S2: and (3) forming a cement-soil wall: after the guide wall is constructed, the cement-soil wall can be constructed, the cement-soil wall grooving can adopt CSM and TRD processes, and in order to ensure that the follow-up customized lock catch profile steel can be smoothly inserted under the dead weight, so that the verticality of the profile steel is controlled, and the water cement ratio of cement paste is controlled to be 1.8-2.0.
S3: installing a guide frame: as shown in fig. 3 (a), (b) and (c), the perpendicularity control of the first section steel is particularly important when the continuous steel wall lock section steel 2 is inserted, and the perpendicularity control of the first section steel influences the perpendicularity of the subsequent whole row. For guaranteeing shaped steel inserts the straightness that hangs down, when shaped steel transferred, set up the leading truck that highly is not less than 2m, through leading truck guidance system 1, the shaped steel straightness that hangs down guides when transferring. And meanwhile, the section steel verticality is adjusted in real time according to the measurement feedback of the verticality of each unit section.
S4: and (3) positioning section steel construction: the positioning section steel is constructed by matching a crane with a vertical guide frame. After the section steel is put in place in sections, the laying suspension beams are used for laying on the guide rail beams at the two sides, and the self-weight plumb bob state of the section steel is ensured.
After the first positioning section steel is placed well, the perpendicularity of subsequent section steel insertion is ensured. And after the cement soil of the first positioning section steel groove section is controlled to be set and fixed, the subsequent section steel is released. In order to ensure the lock catch connection between the section steels, a protective sleeve rod is inserted into the female head of the first positioning section steel. Before the next section steel is placed, the protective sleeve rod in the female head of the positioning section steel is pulled out, so that the situation that the female head cannot be locked and connected after the female head is immersed in cement slurry and finally set is avoided.
S5: the lock catch protecting sleeve is installed, as shown in fig. 4:
a. assembling the protective rods with proper number of sections together, placing the bottom section with the protective rod punch 3 at the lowest part, and installing the protective rod hanging cylinder 4 at the uppermost part;
b. lifting and lowering the protective rod set
c. After the upper end of the protection rod is lowered to the upper end of the female head of the section steel, the protection rod is placed by a protection rod placing device 5, and the protection rod hanging cylinder is taken down;
d. repeating a-b, lowering the second group of protection rods to a position suitable for connecting the upper protection rod group and the lower protection rod group, and connecting the protection rod groups;
e. after the protective rods are connected, hoisting the combined protective rod group upwards by a small section;
f. taking down the protective rod placing device, and continuously lowering the protective rod group;
g. repeating the steps c-f until the last group of protection rods are placed on the section steel by the protection rod placing device;
s6: continuous locking and splicing of lock catch profile steel:
after the positioning profile steel is fixed, the standard lock catch profile steel is inserted in sequence subsequently. The section steel inserting, splicing and verticality mainly comprises the following steps:
s6-1: placing the bottom beams as shown in (a), (b) of fig. 2 and 5:
a. placing a section of initial section bottom beam C at the corresponding position of the guide walls on the two sides of the groove width B of the initial groove width section;
b. connecting n +1 sections of standard section bottom beams D after the initial section bottom beam C, wherein n is the number of standard groove width sections A (2.8m) excavated at the same time, and n is more than or equal to 1;
c. and the bottom beam groups on two sides of the groove width are connected into a rectangular frame by using bottom beam connecting channel steel 6 at two ends of the bottom beam group.
S6-2: installing a gear rack and a gear wheel, as shown in fig. 6:
a. a longitudinal catch wheel is arranged on the bottom beam and connected by a bolt;
b. the catch wheel frame 7 is placed, and the catch wheel frame 7 and the bottom beam are clamped by the tiger-mouth clamps 8 at four places of the support legs of the catch wheel frame;
c. a transverse catch wheel 9 is arranged on the catch wheel frame 7 and connected by using a bolt;
d. and the catch wheel is properly stretched to be just in the position for correctly guiding the section steel to be vertically lowered.
S6-3: the section steel unit is inserted as shown in (a), (b) of FIG. 7:
a. the upper end of the section steel unit is provided with a section steel lifting lug 10;
b. the section steel unit is lifted up and lowered down by lifting equipment, after the section steel unit is lowered to a certain height, the section steel shelving rod 11 penetrates through a section steel web hole, the section steel unit is placed, and the section steel lifting lug 10 is taken down after the section steel is locked.
S6-4: connecting the upper and lower steel sections as shown in (a), (b) of FIG. 8:
the section steel is butted up and down by adopting a high-strength bolt 12.
a. Temporarily positioning a section steel connecting plate 13 (comprising a web plate connecting plate and a wing plate inner and outer connecting plate) by using a high-strength bolt 12 for connection, aligning hole positions 14 of the section steel connecting plate 13 by using a punching nail, installing a torsional shear type high-strength bolt connecting pair, and checking the screwing condition of the torsional shear type high-strength bolt connecting pair to ensure no leakage screwing;
b. after the upper and lower section steel units are connected, integrally hoisting the connected section steel unit group upwards to form a small section, removing the section steel placing rod, continuously placing the section steel unit group integrally downwards, and placing the section steel unit group to a proper height;
c. repeating the steps S6-3-S6-4 until the topmost section steel unit is locked by the section steel placing rod and the section steel lifting lug is taken down, and thus, the connected section steel units form a section steel group
And (4) during the pause of construction, inserting a protective rod into the female heads on the outer sides of the group of the section steel groups which are inserted and placed finally before the section steel is inserted and placed continuously every time, so as to prevent the lock catch from being blocked after slurry is injected into the female opening and finally set. And C, when the section steel group with the built-in protective rod is required to be inserted, the next step after the step c is executed is to insert the protective rod, and the subsequent step S6-5 is continued after the protective rod is inserted.
S6-5: mounting a section steel boom assembly as shown in (a), (b) of fig. 9:
the section steel suspender assembly 15 is hoisted to a height suitable for being connected with the section steel unit, the suspension plate 16 is connected with the section steel web plate by bolts, and the bolts are screwed tightly without loosening;
s6-6: a locking section steel set, as shown in (a), (b) of fig. 10:
a. hoisting the lifting lugs on the section steel boom assembly by the hoisting equipment, hoisting the section steel group and the section steel boom assembly for a short distance upwards together, and taking down the section steel laying rod;
c. continuing to lower until the laying beam 17 of the section steel suspender assembly is laid on the bottom beam;
d. and rotating the nut by using a rotating handle, and adjusting the height of the suspender to keep the verticality of the section steel group and enable the upper end of the section steel group to be level with the upper ends of other section steel groups, so as to lock the section steel groups.
And finally, after the group of section steel is inserted, mounting the wheel blocking frame and the wheel blocking frame to the position to be inserted of the next group of section steel, and continuing to insert the next group of section steel.
S7: and (3) shifting, and constructing the next groove section: and repeating the steps from S1 to S6 until the construction of the enclosure is completed.
Claims (2)
1. A construction method for controlling the continuous inserting verticality of an underground water soil steel wall is characterized by comprising the following steps:
the first step is as follows: and (3) guide wall construction: before the underground cement soil wall is constructed into a wall, constructing a guide wall for guiding and positioning the underground cement soil wall and preventing the wall of the wall from collapsing, wherein the guide wall is of a cast-in-place reinforced concrete structure or a steel guide beam;
the second step is as follows: and (3) forming a cement-soil wall: after the guide wall is constructed, carrying out wall forming construction on the cement-soil wall, wherein CSM and TRD construction processes of the equal-thickness cement-soil wall are adopted for forming a groove on the cement-soil wall, so that the subsequent customized lock catch profile steel can be smoothly inserted under the dead weight, the verticality of the profile steel is controlled conveniently, and the water-cement ratio of cement paste is controlled to be 1.8-2.0;
the third step: installing a guide frame: inserting the continuous steel wall lock catch section steel, setting a guide frame with the height not lower than 2m when the section steel is transferred, guiding the section steel verticality when transferring through a guide frame guide system, and simultaneously adjusting the section steel verticality in real time according to the transfer verticality measurement feedback of each unit segment;
the fourth step: and (3) positioning section steel construction: the positioning section steel is constructed by matching a crane with a vertical guide frame, and after the positioning section steel is put in place in sections, the laying suspension beams are placed on the guide rail beams at the two sides to ensure the self-weight plumb bob state of the positioning section steel;
the fifth step: installing a lock catch protective sleeve:
a. assembling the protection rods together, placing the bottom section with the protection rod punch at the lowest part, and installing a protection rod hanging cylinder at the uppermost part;
b. hoisting the protective rod group and putting down;
c. after the upper end of the protection rod is lowered to the upper end of the female head of the section steel, the protection rod is placed by a protection rod placing device, and the protection rod hanging cylinder is taken down;
d. repeating a-b, lowering the second group of protection rods to a position suitable for connecting the upper protection rod group and the lower protection rod group, and connecting the protection rod groups;
e. after the protective rods are connected, hoisting the combined protective rod group upwards by a small section;
f. taking down the protective rod placing device, and continuously lowering the protective rod group;
g. repeating the steps c-f until the last group of protection rods are placed on the section steel by the protection rod placing device;
a sixth step: continuous locking and splicing of lock catch profile steel:
after the positioning section steel is fixed, the standard lock catch section steel is inserted in sequence; the section steel inserting, splicing and verticality mainly comprises the following steps:
(1) placing a bottom beam:
a. placing a section of initial section bottom beam at the corresponding position of the guide walls on the two sides of the groove width of the initial groove width section;
b. connecting n +1 sections of standard section bottom beams after the initial section bottom beams, wherein n is the number of the sections of the standard groove width excavated at the same time, and n is more than or equal to 1;
c. the bottom beam groups at two sides of the groove width are connected into a rectangular frame by using bottom beam connecting channel steel at two ends of the bottom beam group;
(2) installing a blocking wheel frame and a blocking wheel:
a. a longitudinal catch wheel is arranged on the bottom beam and connected by a bolt;
b. placing the wheel blocking frame, and clamping the wheel blocking frame and the bottom beam by using a tiger mouth clamp at four places of a supporting leg of the wheel blocking frame;
c. a transverse catch wheel is arranged on the catch wheel frame and connected by a bolt;
d. properly extending and retracting the longitudinal catch wheel and the transverse catch wheel to ensure that the longitudinal catch wheel and the transverse catch wheel are just positioned at the position for correctly guiding the section steel to be vertically lowered;
(3) inserting the section steel unit:
a. mounting a profile steel lifting lug at the upper end of the profile steel unit;
b. hoisting the section steel unit by using hoisting equipment, lowering the section steel unit to a certain height, penetrating a section steel web hole by using a section steel laying rod, laying the section steel unit, locking the section steel, and then taking down a section steel lifting lug;
(4) connecting upper and lower section steel units:
a. temporarily positioning the section steel connecting plate by using high-strength bolt connection, aligning hole positions of the connecting plate by using a punching nail, installing a torsional shear type high-strength bolt connection pair, and checking the screwing condition of the torsional shear type high-strength bolt connection pair to ensure no screwing leakage;
b. after the upper and lower section steel units are connected, integrally hoisting the connected section steel unit group upwards to form a small section, removing the section steel placing rod, continuously placing the section steel unit group integrally downwards, and placing the section steel unit group to a proper height;
c. repeating the steps (3) to (4) until the topmost section steel unit is locked by the section steel placing rod and the section steel lifting lug is taken down, so that the connected section steel units form a section steel group; and (3) suspending construction, inserting a protective rod into the female head outside the group of section steel groups inserted and placed finally before the section steel is inserted and placed continuously every time to prevent slurry from being injected into the female opening and causing lock catch blockage after final setting, and when the section steel groups needing the built-in protective rods are inserted and placed, performing the next step of the step c, namely inserting and placing the protective rods, and continuing the subsequent step (5) after the protective rods are inserted and placed;
(5) installing a section steel suspender assembly:
the steel section suspender assembly is hoisted to a height suitable for being connected with the steel section unit, the hoisting plate and the steel section web plate are connected by bolts, and the bolts are screwed tightly without loosening;
(6) locking the steel section:
a. hoisting the lifting lugs on the section steel boom assembly by the hoisting equipment, hoisting the section steel group and the section steel boom assembly for a short distance upwards together, and taking down the section steel laying rod;
c. continuing to lower until the placing beam of the section steel suspender assembly is placed on the bottom beam;
d. rotating the nut by using a rotating handle, adjusting the height of the suspender to keep the section steel group to be vertical and enable the upper end of the section steel group to be level with the upper ends of other section steel groups, and locking the section steel groups; after the group of section steel is inserted, mounting a wheel blocking frame and a wheel blocking frame to a position to be inserted of the next group of section steel, and continuously inserting the next group of section steel;
a seventh step of: and (3) shifting, and constructing the next groove section: and repeating the first step to the sixth step until the construction of the enclosure body is completed.
2. The underground water earth steel wall continuous inserting verticality control construction method according to claim 1, characterized in that: in the fourth step, after the first positioning section steel is put down, in order to ensure the verticality of subsequent section steel insertion, the subsequent section steel is put down after the cement soil of the groove section of the first positioning section steel is finally set and fixed; in order to ensure the lock catch connection between the section steels, a protective sleeve rod needs to be inserted into the female head of the first positioning section steel, and before the next section steel is placed down, the protective sleeve rod in the female head of the positioning section steel is pulled out, so that the condition that the lock catch connection cannot be carried out due to the fact that the female head is immersed into cement slurry and finally set is avoided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010736069.6A CN111851468B (en) | 2020-07-28 | 2020-07-28 | Underground water soil steel wall continuous inserting verticality control construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010736069.6A CN111851468B (en) | 2020-07-28 | 2020-07-28 | Underground water soil steel wall continuous inserting verticality control construction method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111851468A CN111851468A (en) | 2020-10-30 |
| CN111851468B true CN111851468B (en) | 2021-11-02 |
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| CN112663595B (en) * | 2020-12-03 | 2022-05-20 | 上海市基础工程集团有限公司 | Adjusting and fixing device for first root locking section steel of underground continuous steel wall |
| CN112609678B (en) * | 2020-12-03 | 2022-11-08 | 上海市基础工程集团有限公司 | Construction method of low-clearance underground continuous steel wall locking profile steel |
| CN113216226B (en) * | 2021-04-19 | 2023-03-28 | 中铁广州工程局集团有限公司 | Steel sheet pile cofferdam construction method |
| CN113585294A (en) * | 2021-07-29 | 2021-11-02 | 中交路桥建设有限公司 | Recyclable high-pressure jet grouting pile reinforcing method |
| CN113846624A (en) * | 2021-08-09 | 2021-12-28 | 上海市基础工程集团有限公司 | Construction method for implementing underground water-soil continuous steel wall by double-wheel slot milling machine |
| CN113756286A (en) * | 2021-08-09 | 2021-12-07 | 上海市基础工程集团有限公司 | Construction method for implementing underground water soil continuous steel wall by TRD method |
| CN114032913B (en) * | 2021-11-02 | 2023-07-28 | 上海市基础工程集团有限公司 | Device and method for filling lock catch air bags of underground cement soil continuous steel wall |
| CN115324069A (en) * | 2022-08-18 | 2022-11-11 | 中铁十六局集团北京轨道交通工程建设有限公司 | Construction method for sectional hoisting and inserting type steel TRD supporting structure under low clearance |
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| CN102162251B (en) * | 2011-03-03 | 2012-07-25 | 天津华悦土木工程质量检测有限公司 | Installation method of support middle beam in foundation pit of section steel cement-soil wall |
| CN202559375U (en) * | 2012-04-12 | 2012-11-28 | 东南大学 | H-shaped steel underground diaphragm wall base pit support structure |
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