CN113969574A - Construction method of assembled type steel-inserted underground continuous wall - Google Patents
Construction method of assembled type steel-inserted underground continuous wall Download PDFInfo
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- CN113969574A CN113969574A CN202111351079.9A CN202111351079A CN113969574A CN 113969574 A CN113969574 A CN 113969574A CN 202111351079 A CN202111351079 A CN 202111351079A CN 113969574 A CN113969574 A CN 113969574A
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- 238000010276 construction Methods 0.000 title claims abstract description 76
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 271
- 239000010959 steel Substances 0.000 claims abstract description 271
- 238000000034 method Methods 0.000 claims abstract description 21
- 230000008569 process Effects 0.000 claims abstract description 17
- 239000004567 concrete Substances 0.000 claims description 17
- 238000003780 insertion Methods 0.000 claims description 14
- 230000037431 insertion Effects 0.000 claims description 14
- 239000011241 protective layer Substances 0.000 claims description 14
- 238000001514 detection method Methods 0.000 claims description 6
- 238000007689 inspection Methods 0.000 claims description 6
- 230000002787 reinforcement Effects 0.000 claims description 6
- 230000004888 barrier function Effects 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 238000005259 measurement Methods 0.000 claims description 3
- 238000007781 pre-processing Methods 0.000 claims description 3
- 230000003014 reinforcing effect Effects 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 238000012545 processing Methods 0.000 abstract description 4
- 238000011084 recovery Methods 0.000 abstract description 2
- 239000002131 composite material Substances 0.000 description 6
- 238000013461 design Methods 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 230000000149 penetrating effect Effects 0.000 description 3
- 239000011150 reinforced concrete Substances 0.000 description 3
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 238000005266 casting Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000126 substance Substances 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
- E02D5/187—Bulkheads or similar walls made solely of concrete in situ the bulkheads or walls being made continuously, e.g. excavating and constructing bulkheads or walls in the same process, without joints
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D33/00—Testing foundations or foundation structures
Abstract
The invention provides an underground continuous wall with a simple structure and stable and reliable performance and a special construction method for implementing combined assembly aiming at the innovative underground continuous wall, so that the construction time of the underground continuous wall is effectively shortened, the construction steps are simplified, the steel bar binding and secondary processing time and the construction land are saved, the secondary use and recovery of the related steel structure components of the continuous wall are implemented, and the construction cost is greatly saved. The underground continuous wall is composed of concave joint continuous wall sections at two ends, T-shaped joint continuous wall sections and a plurality of groups of combined joint continuous wall sections which are continuously arranged and connected in the middle. And (5) connecting construction of each group of continuous wall sections is carried out by using the positioning frame. And (3) adopting a positioning frame to calibrate the position and control the verticality in the process of lowering each flange steel member by each continuous wall section, and dismantling the positioning frame after construction.
Description
Technical Field
The invention relates to an underground continuous wall formed by combining and assembling inserted section steel and an assembling construction method thereof, belonging to the field of constructional engineering.
Background
Along with the development of economy in China, the development and utilization of urban underground space also show the trends of rapid development and accelerated technology upgrade. For the construction of the underground deep foundation pit, how to rapidly complete the installation of the supporting structure of the foundation pit in the limited building space and realize the green supporting function of the foundation pit is very important on the premise of ensuring the safety and the stability.
The prior art reinforced concrete underground continuous wall construction method is the most common underground continuous wall structure and construction method at present, and the continuous wall and the construction method have a plurality of defects. Firstly, the construction quality of the reinforced concrete underground continuous wall is greatly influenced by strata, and in a complex stratum, the problems of wall shrinkage, collapse, rib leakage of the wall body, insufficient wall width thickness, bulging and the like are generally solved; secondly, the construction steps of the reinforced concrete underground continuous wall are complex, the construction time of the underground continuous wall is long, and the binding of the reinforcing steel bars and the complex construction steps consume a large amount of time and construction land; thirdly, the reinforcement cage in the underground continuous wall is difficult to recycle and reutilize, and the construction cost is high.
In view of this, the present patent application is specifically proposed.
Disclosure of Invention
The invention provides an underground continuous wall with a simple structure and stable and reliable performance and a special construction method for implementing combined assembly aiming at the innovative underground continuous wall, aiming at solving the problems in the prior art, so as to effectively shorten the construction time of the underground continuous wall and simplify the construction steps, thereby saving the binding time of reinforcing steel bars and secondary processing time and construction land, simultaneously implementing secondary use and recovery of related steel structure components of the continuous wall and greatly saving the construction cost.
In order to achieve the design purpose, the construction method of the fabricated type inserted section steel underground continuous wall comprises the following steps:
step 1), preprocessing and manufacturing each related component of the fabricated type inserted profile steel underground continuous wall, and protecting by adopting sleepers when stacking on a construction site;
step 2), moving and removing underground buried barriers, and reinforcing the weak stratum;
step 3), carrying out measurement lofting by using a total station, and determining the specific position of the enclosure structure;
step 4), excavating a guide wall groove, constructing a guide wall, and checking and accepting the width, the perpendicularity, the flatness, the plane position and the top surface elevation of the guide wall by adopting a leveling instrument, a plumb bob and a ruler amount mode;
step 5), dividing the groove sections of the underground continuous wall according to the structure of the underground continuous wall and the site construction condition, excavating grooves by adopting groove forming equipment, and cleaning the bottom;
step 6), after grooving, adopting a related verticality detector to carry out verticality inspection;
step 7), measuring and lofting by adopting a total station, determining the position of a positioning frame, and installing the positioning frame;
step 8), constructing a concave joint continuous wall section, mounting gaskets on the upper part of a concave joint flange steel member and the outer side of the lower part of the concave joint flange steel member, and mounting end-inserted section steel and middle-inserted section steel through a connecting steel plate combination;
step 9), hoisting the upper part of the concave joint flange steel member and the lower part of the concave joint flange steel member, adopting a pneumatic torque wrench to perform bolt tightening operation and performing torque detection on the bolt;
step 10), carrying out perpendicularity detection on the upper part of the concave joint flange steel member and the lower part of the concave joint flange steel member; if the verticality deviation is large, hoisting and adjusting again;
step 11), respectively inserting the end inserted section steel and the middle inserted section steel into the section steel insertion openings;
step 12) repeating the steps 7) to 11), and continuously combining a plurality of groups of combined joint continuous wall sections by the same method, and connecting the combined joint continuous wall sections and the T-shaped joint continuous wall sections; in addition, a verticality detector and a total station are continuously adopted for precision inspection in the construction process;
step 13), after the hoisting combination connection of all the components is completed, welding steel purlins to fix all flange steel components;
and 14) inserting grouting guide pipes into the compartments formed by the inserted section steels in the adjacent 2 groups to complete the concrete pouring between the concrete protective layer and the inserted section steels in the adjacent 2 groups, and finishing the construction of the whole underground continuous wall.
And further, using a positioning frame to implement connection construction of each group of continuous wall sections, calibrating the position and controlling the verticality in the process of placing each flange steel member in each group of continuous wall sections, and dismantling the positioning frame after construction.
Furthermore, the positioning frame is a basic frame consisting of 4H-shaped steel supporting legs, the vertical positioning rod is lapped on the H-shaped steel supporting legs, the transverse positioning rod is lapped on the vertical positioning rod, and the right-angle steel plate is connected with the H-shaped steel supporting legs;
the right-angle steel plates are connected with the H-shaped steel supporting legs to be fixed on the ground and/or the guide wall, and the transverse positioning rods are lapped and perpendicular to the inserted section steel and fixed on two sides of the flange steel member to control transverse positioning of the flange steel member in the lowering process; the vertical positioning rods are lapped and parallel to the inserted section steel and fixed at two ends of the continuous wall section so as to control the vertical positioning of the flange steel member in the lowering process; the locating rack is installed before the flange steel member is transferred, removes the inboard transverse orientation pole of flange steel member in advance after the flange steel member of both sides is transferred and is accomplished, waits to insert the shaped steel and transfers and demolish whole locating rack again after accomplishing.
Furthermore, in the connection construction of two adjacent groups of continuous wall sections, a steel connecting rod is connected between two groups of inserted section steels to implement secondary reinforcement; the steel connecting rod is of a specially-made long bolt structure, is locked by a nut after being inserted into the inserted profile steel, and can be detached after the construction of the underground continuous wall is completed.
Furthermore, in the construction of the concave joint continuous wall section, firstly, the upper part of the concave joint flange steel member and the lower part of the concave joint flange steel member are lowered, then the insertion of the section steel and the middle insertion of the section steel in the end head are completed, and the section steel member is applied as a concrete protective layer after the insertion is completed;
in the construction of the combined joint continuous wall section, the upper part of a combined joint flange steel member and the lower part of the combined joint flange steel member are firstly lowered, then the intermediate inserted section steel is inserted after the lowering is finished, and a concrete protective layer is constructed after the section steel member is inserted;
during construction of the T-shaped joint continuous wall section, the upper portion of a T-shaped joint flange steel member and the lower portion of the T-shaped joint flange steel member are firstly placed, then the section steel is inserted into the end and the section steel is inserted into the middle after the placement is completed, and the section steel member is used as a concrete protective layer after the insertion is completed.
Furthermore, the joints of two adjacent inserted section steels are lapped by adopting connecting steel plates, and positioning bolts are used for penetrating through positioning bolt holes to fix the joints outside the lapping.
As mentioned above, the construction method of the fabricated type inserted section steel underground continuous wall has the following advantages:
1. compared with the prior art, the construction method of the underground continuous wall does not adopt complicated processes such as reinforcement cage processing and the like, so that the construction period can be remarkably shortened;
2. the novel assembled type inserted profile steel underground continuous wall is adopted, so that the whole engineering construction land is less, the construction efficiency is higher, and the method can be widely applied to underground deep foundation pit construction under various geological conditions;
3. the assembled type steel member in the underground continuous wall can be recycled, and can be applied to underground continuous walls with different thicknesses and design strengths in a secondary splicing mode after being recycled, so that the construction cost is effectively reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.
The structures, ratios, sizes, and the like shown in the present specification are only used for matching with the contents disclosed in the specification, so that those skilled in the art can understand and read the present invention, and do not limit the conditions for implementing the present invention, so that the present invention has no technical significance, and any structural modifications, changes in the ratio relationship, or adjustments of the sizes, without affecting the functions and purposes of the present invention, should still fall within the scope covered by the contents disclosed in the present invention.
FIG. 1 is a schematic structural view of an initial section of the underground diaphragm wall;
FIG. 2 is a schematic structural view of the underground diaphragm wall main body section;
FIG. 3 is a schematic structural view of the tail section of the underground diaphragm wall;
FIG. 4 is a schematic structural view of the inserted section steel;
FIG. 5 is a schematic view showing the vertical connection of two sections of inserted section steel;
FIG. 6 is a schematic view of the overall structure of the fabricated type steel-inserted underground continuous wall;
FIG. 7 is a schematic view showing the interconnection of flange steel members of the diaphragm wall;
FIG. 8 is a schematic structural view of the positioning frame;
FIG. 9 is a top view of the construction using the spacer;
in the above figures, 1, a female connector continuous wall segment; 2. a composite joint diaphragm wall section; 3. a T-joint diaphragm wall section; 4. the upper part of the concave joint flange steel member; 5. the lower part of the concave joint flange steel member; 6. the upper part of the combined joint flange steel member; 7. the lower part of the combined joint flange steel member; 8. the upper part of the T-shaped joint flange steel member; 9. the lower part of the T-shaped joint flange steel member; 10. inserting section steel into the end head; 11. section steel is inserted in the middle; 12. a gasket; 13. a concrete protective layer; 14. a section steel socket; 15. a female snap-in fitting; 16. a T-shaped snap joint; 17. a slurry flow port; 18. positioning the bolt hole; 19. connecting steel plates; 20. positioning the bolt; 21. a connecting bolt; 22. a positioning frame; 23. a steel connecting rod; 24. a transverse positioning rod; 25. a vertical positioning rod; 26. h-shaped steel supporting legs; 27. a right-angle steel plate; 28. and (5) fixing the bolt.
Detailed Description
To further illustrate the technical solutions adopted by the present application to achieve the intended design objectives, the following preferred embodiments are provided in conjunction with the accompanying drawings.
concave type joint diaphragm wall section 1 be located underground diaphragm wall's initial end position, it is including a set of concave type joint edge of a wing steel member upper portion 4 and concave type joint edge of a wing steel member lower part 5 that sets up relatively, at concave type joint edge of a wing steel member upper portion 4, the one end of concave type joint edge of a wing steel member lower part 5 is provided with concave type interlock joint 15 respectively, at concave type joint edge of a wing steel member upper portion 4, the inboard of concave type joint edge of a wing steel member lower part 5 is provided with shaped steel socket 14 of arranging in pairs respectively, at concave type joint edge of a wing steel member upper portion 4, the outside of concave type joint edge of a wing steel member lower part 5 is provided with array gasket 12 respectively, plug in shaped steel 10 and middle plug in shaped steel socket 14 respectively in the end.
Combination joint diaphragm wall section 2 be located underground diaphragm wall's middle section position, it is including a set of combination joint edge of a wing steel member upper portion 6 and combination joint edge of a wing steel member lower part 7, be provided with concave type interlock joint 15 respectively at the both ends of combination joint edge of a wing steel member upper portion 6 and combination joint edge of a wing steel member lower part 7, T type interlock joint 16, be provided with shaped steel socket 14 of arranging in pairs respectively at the inboard of combination joint edge of a wing steel member upper portion 6 and combination joint edge of a wing steel member lower part 7, be provided with several groups of gaskets 12 in the outside of combination joint edge of a wing steel member upper portion 6 and combination joint edge of a wing steel member lower part 7, insert shaped steel 11 in the middle of a plurality of groups and peg graft in shaped steel socket 14.
T type joint diaphragm wall section 3 be located underground continuous wall's end position at the end, it is including a set of T type joint edge of a wing steel member upper portion 8 and T type joint edge of a wing steel member lower part 9 that set up relatively, be provided with T type interlock joint 16 respectively in the one end of T type joint edge of a wing steel member upper portion 8 and T type joint edge of a wing steel member lower part 9, be provided with shaped steel socket 14 of arranging in pairs respectively in the inboard of T type joint edge of a wing steel member upper portion 8 and T type joint edge of a wing steel member lower part 9, be provided with array gasket 12 respectively in the outside of T type joint edge of a wing steel member upper portion 8 and T type joint edge of a wing steel member lower part 9, end interpolation shaped steel 10 and middle interpolation shaped steel 11 are pegged graft respectively in shaped steel socket 14.
When the female joint diaphragm wall section 1 and the combined joint diaphragm wall section 2 are connected, the T-shaped snap joints 16 of the upper part 6 of the combined joint flange steel member and the lower part 7 of the combined joint flange steel member are respectively inserted into the female snap joints 15 of the upper part 4 of the female joint flange steel member and the lower part 5 of the female joint flange steel member.
When two adjacent groups of composite joint continuous wall sections 2 are connected, the T-shaped snap joints 16 of one group of composite joint flange steel member upper parts 6 and the composite joint flange steel member lower parts 7 are respectively inserted into the concave snap joints 15 of the other group of composite joint flange steel member upper parts 6 and the composite joint flange steel member lower parts 7.
When the combined joint continuous wall section 2 and the T-shaped joint continuous wall section 3 are connected, the T-shaped snap joints 16 of the upper part 8 of the T-shaped joint flange steel member and the lower part 9 of the T-shaped joint flange steel member are respectively inserted into the concave snap joints 15 of the upper part 6 of the combined joint flange steel member and the lower part 7 of the combined joint flange steel member.
Further, the end inserted section steel 10 and the middle inserted section steel 11 have the same structure, and are provided with a plurality of positioning bolt holes 18 and slurry flow openings 17.
In order to adapt to the construction depth of the underground deep foundation pit and the fact that the inserted section steel is not too long and is inconvenient to process and transport, the inserted section steel is processed into the same standard external dimension and thickness, such as 5m by 1m by 0.02 m.
When two adjacent inserted steel bars are connected, the connecting steel plates 19 are adopted for lap joint, positioning bolts 20 penetrate through the positioning bolt holes 18 to be positioned outside the lap joint, and then the fixing and installation are carried out through the connecting bolts 21.
Further, after each of the above-described inserted section steels is inserted into the section steel insertion opening 14, a steel connecting rod 23 may be connected between two adjacent sets of inserted section steels to perform secondary reinforcement; the steel connecting rod 23 is of an elongated bolt structure, and the end of the steel connecting rod 23 is screwed and fixed through a nut after penetrating through the positioning bolt hole 18.
Locating rack 22 be used for carrying out accurate position calibration and straightness control that hangs down when transferring above-mentioned each flange steel member, it includes the basic frame who comprises 4H shaped steel landing legs 26, vertical positioning rod 25 laps in H shaped steel landing leg 26, horizontal positioning rod 24 laps in vertical positioning rod 25, H shaped steel landing leg 26 is connected to right angle steel board 27.
The transverse positioning rods 24 are provided with 4 pieces, are lapped in the vertical direction of the inserted section steel and are fixed on two sides of each flange steel component so as to control the transverse positioning of each flange steel component in the lowering process;
the vertical positioning rods 25 are designed with 2, are lapped in the parallel direction of the inserted section steel and are fixed at two ends of each continuous wall section so as to control the vertical positioning of each flange steel member in the lowering process;
the 4H-shaped steel legs 26 form the basic frame of the positioning frame 22, the right-angle steel plates 27 are connected with the H-shaped steel legs 26, and the right-angle steel plates 27 are fixed on the ground and a guide wall through fixing bolts 28 to fix the whole positioning frame 22.
The locating rack 22 is installed and located before each flange steel member is transferred, 2 transverse locating rods 24 located on the inner side of each flange steel member are removed after the flange steel members on two sides are transferred, and the whole locating rack 22 is finally removed after the inserted section steel is transferred and the steel connecting rods 23 are connected and fixed.
Based on the structural design of the fabricated type inserted profile steel underground continuous wall, the construction method is realized, and comprises the following steps:
step 1), pre-processing and manufacturing each related component of the fabricated type inserted profile steel underground continuous wall, and adopting sleepers for protection when stacking on a construction site;
step 2), moving and removing underground buried barriers, and reinforcing the weak stratum;
step 3), carrying out measurement lofting by using a total station, and determining the specific position of the enclosure structure;
step 4), excavating a guide wall groove, constructing a guide wall, and checking and accepting the width, the perpendicularity, the flatness, the plane position and the top surface elevation of the guide wall by adopting a leveling instrument, a plumb bob and a ruler amount mode;
step 5), dividing the groove sections of the underground continuous wall according to the structure of the underground continuous wall and the site construction condition, excavating grooves by adopting groove forming equipment, and cleaning the bottom;
step 6), after grooving, adopting a related verticality detector to carry out verticality inspection;
step 7), measuring and lofting by adopting a total station, determining the position of the positioning frame 22, and installing the positioning frame 22;
step 8), constructing the concave joint continuous wall section 1, installing gaskets 12 on the outer sides of the upper part 4 of the concave joint flange steel member and the lower part 5 of the concave joint flange steel member, and assembling end inserted section steel 10 and middle inserted section steel 11 through connecting steel plates 19;
step 9), hoisting the upper part 4 of the concave joint flange steel member and the lower part 5 of the concave joint flange steel member, adopting a pneumatic torque wrench to perform bolt tightening operation and performing torque detection on the bolt;
step 10), carrying out perpendicularity detection on the upper part 4 of the concave joint flange steel member and the lower part 5 of the concave joint flange steel member; if the verticality deviation is large, hoisting and adjusting again;
step 11), respectively inserting the end inserted section steel 10 and the middle inserted section steel 11 into the section steel insertion opening 14;
step 12) repeating the steps 7) to 11), and continuously combining a plurality of groups of combined joint continuous wall sections 2 and connecting the combined joint continuous wall sections 2 and the T-shaped joint continuous wall section 3 by the same method; in addition, a verticality detector and a total station are continuously adopted for precision inspection in the construction process;
step 13), after the hoisting combination connection of all the components is completed, welding steel purlins to fix all flange steel components;
and 14) inserting grouting guide pipes into the compartments formed by the inserted section steels in the adjacent 2 groups to complete the concrete pouring between the concrete protective layer 13 and the inserted section steels in the adjacent 2 groups, and finishing the construction of the integral underground continuous wall.
In the construction method, the underground continuous wall is composed of concave joint continuous wall sections 1 at two ends, T-shaped joint continuous wall sections 3 and a plurality of groups of combined joint continuous wall sections 2 which are continuously arranged and connected in the middle. The construction of the connection of each set of continuous wall sections is performed using the spacer 22.
And (3) adopting the positioning frame 22, implementing position calibration and verticality control in the process of lowering each flange steel member by each continuous wall section, and dismantling the positioning frame 22 after construction.
Specifically, 4H-shaped steel legs 26 form a base frame of the positioning frame 22, and the right-angle steel plate 27 is fixed to the ground and/or a guide wall by bolts; locating rack 22 is installed before the flange steel member is transferred, removes the inboard transverse orientation pole 24 of flange steel member in advance after the flange steel member of both sides is transferred and is accomplished, waits to insert the shaped steel and transfers and accomplish the back and remove whole locating rack 22 again. The transverse positioning rods 24 of the positioning frames 22 are lapped and perpendicular to the inserted section steel and are fixed on two sides of the flange steel member so as to control the transverse positioning of the flange steel member in the lowering process; the vertical positioning rods 25 of the positioning frame 22 are lapped and parallel to the inserted section steel and are fixed at two ends of the continuous wall section so as to control the vertical positioning of the flange steel member in the lowering process;
further, in the connection construction of the adjacent two sets of continuous wall sections, a steel connection rod 23 is connected between the two sets of inserted section steels to perform secondary reinforcement. The steel connecting rod 23 is a specially-made long bolt structure, the steel connecting rod 23 is inserted into the inserted section steel and then locked by a nut, and the steel connecting rod can be detached after the construction of the underground continuous wall is completed.
Further, in the construction of the concave joint continuous wall section 1, firstly, the upper part 4 of the concave joint flange steel member and the lower part 5 of the concave joint flange steel member are put down, then the section steel 10 and the middle section steel 11 are inserted into the insertion end after the section steel members are put down, and then the concrete protective layer 13 is constructed after the section steel members are inserted into the insertion end.
In the construction of the combined joint continuous wall section 2, the upper part 6 of the combined joint flange steel member and the lower part 7 of the combined joint flange steel member are firstly lowered, then the section steel 11 is inserted into the middle after the lowering is finished, and the section steel member is constructed into the concrete protective layer 13 after the insertion is finished.
In the construction of the T-shaped joint continuous wall section 3, the upper part 8 of a T-shaped joint flange steel member and the lower part 9 of the T-shaped joint flange steel member are firstly put down, then the section steel 10 and the middle section steel 11 are inserted into the end after the putting is finished, and a concrete protective layer 13 is constructed after the section steel member is inserted into the end.
Further, in order to solve the problems of overlong section steel components and inconvenience in processing and transportation, the section steel components are designed in a modular structure and are spliced with each other to meet the requirements of the use depth and the width of the underground diaphragm wall, namely, connecting steel plates 19 are adopted at the joints of two adjacent inserted section steel components for overlapping, positioning bolts 20 are used at the joints for penetrating through positioning bolt holes 18 for positioning, and then the section steel components are fixedly connected through connecting bolts 21.
Similar technical solutions can be derived from the solutions given in the figures and the description, as described above. However, any solution that does not depart from the structure of the present invention is intended to fall within the scope of the claims of the present application.
Claims (6)
1. A construction method of an assembled type inserted profile steel underground continuous wall is characterized in that: comprises the following steps of (a) carrying out,
step 1), preprocessing and manufacturing each related component of the fabricated type inserted profile steel underground continuous wall, and protecting by adopting sleepers when stacking on a construction site;
step 2), moving and removing underground buried barriers, and reinforcing the weak stratum;
step 3), carrying out measurement lofting by using a total station, and determining the specific position of the enclosure structure;
step 4), excavating a guide wall groove, constructing a guide wall, and checking and accepting the width, the perpendicularity, the flatness, the plane position and the top surface elevation of the guide wall by adopting a leveling instrument, a plumb bob and a ruler amount mode;
step 5), dividing the groove sections of the underground continuous wall according to the structure of the underground continuous wall and the site construction condition, excavating grooves by adopting groove forming equipment, and cleaning the bottom;
step 6), after grooving, adopting a related verticality detector to carry out verticality inspection;
step 7), measuring and lofting by adopting a total station, determining the position of a positioning frame, and installing the positioning frame;
step 8), constructing a concave joint continuous wall section, mounting gaskets on the upper part of a concave joint flange steel member and the outer side of the lower part of the concave joint flange steel member, and mounting end-inserted section steel and middle-inserted section steel through a connecting steel plate combination;
step 9), hoisting the upper part of the concave joint flange steel member and the lower part of the concave joint flange steel member, adopting a pneumatic torque wrench to perform bolt tightening operation and performing torque detection on the bolt;
step 10), carrying out perpendicularity detection on the upper part of the concave joint flange steel member and the lower part of the concave joint flange steel member; if the verticality deviation is large, hoisting and adjusting again;
step 11), respectively inserting the end inserted section steel and the middle inserted section steel into the section steel insertion openings;
step 12) repeating the steps 7) to 11), and continuously combining a plurality of groups of combined joint continuous wall sections by the same method, and connecting the combined joint continuous wall sections and the T-shaped joint continuous wall sections; in addition, a verticality detector and a total station are continuously adopted for precision inspection in the construction process;
step 13), after the hoisting combination connection of all the components is completed, welding steel purlins to fix all flange steel components;
and 14) inserting grouting guide pipes into the compartments formed by the inserted section steels in the adjacent 2 groups to complete the concrete pouring between the concrete protective layer and the inserted section steels in the adjacent 2 groups, and finishing the construction of the whole underground continuous wall.
2. The construction method of the fabricated insert type steel underground continuous wall according to claim 1, wherein: and (3) implementing the connection construction of each group of continuous wall sections by using the positioning frames, calibrating the position and controlling the verticality in the process of placing each flange steel member in each group of continuous wall sections, and dismantling the positioning frames after construction.
3. The construction method of the fabricated insert type steel underground continuous wall as claimed in claim 2, wherein: the positioning frame is a basic frame consisting of 4H-shaped steel supporting legs, the vertical positioning rod is lapped on the H-shaped steel supporting legs, the transverse positioning rod is lapped on the vertical positioning rod, and the right-angle steel plate is connected with the H-shaped steel supporting legs;
the right-angle steel plates are connected with the H-shaped steel supporting legs to be fixed on the ground and/or the guide wall, and the transverse positioning rods are lapped and perpendicular to the inserted section steel and fixed on two sides of the flange steel member to control transverse positioning of the flange steel member in the lowering process; the vertical positioning rods are lapped and parallel to the inserted section steel and fixed at two ends of the continuous wall section so as to control the vertical positioning of the flange steel member in the lowering process; the locating rack is installed before the flange steel member is transferred, removes the inboard transverse orientation pole of flange steel member in advance after the flange steel member of both sides is transferred and is accomplished, waits to insert the shaped steel and transfers and demolish whole locating rack again after accomplishing.
4. The construction method of the fabricated insert type steel underground continuous wall as claimed in claim 3, wherein: in the connection construction of two adjacent groups of continuous wall sections, a steel connecting rod is connected between two groups of inserted section steels to implement secondary reinforcement;
the steel connecting rod is of a specially-made long bolt structure, is locked by a nut after being inserted into the inserted profile steel, and can be detached after the construction of the underground continuous wall is completed.
5. The construction method of the fabricated insert type steel underground continuous wall according to claim 4, wherein: in the construction of the concave joint continuous wall section, firstly, the upper part of a concave joint flange steel member and the lower part of the concave joint flange steel member are lowered, then the insertion of the section steel and the middle insertion of the section steel in the end joint are completed, and a concrete protective layer is constructed after the section steel member is inserted;
in the construction of the combined joint continuous wall section, the upper part of a combined joint flange steel member and the lower part of the combined joint flange steel member are firstly lowered, then the intermediate inserted section steel is inserted after the lowering is finished, and a concrete protective layer is constructed after the section steel member is inserted;
during construction of the T-shaped joint continuous wall section, the upper portion of a T-shaped joint flange steel member and the lower portion of the T-shaped joint flange steel member are firstly placed, then the section steel is inserted into the end and the section steel is inserted into the middle after the placement is completed, and the section steel member is used as a concrete protective layer after the insertion is completed.
6. The construction method of the fabricated type insert steel underground continuous wall according to claim 5, wherein: and connecting steel plates are adopted at the joints of two adjacent inserted section steels for lap joint, positioning bolts are used at the lap joints to penetrate through positioning bolt holes for positioning, and then the two inserted section steels are fixedly connected through the connecting bolts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111351079.9A CN113969574A (en) | 2021-11-16 | 2021-11-16 | Construction method of assembled type steel-inserted underground continuous wall |
Applications Claiming Priority (1)
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115467321A (en) * | 2022-03-25 | 2022-12-13 | 湖南大学 | Two-wall-in-one multi-cavity type steel reinforced concrete composite structure and construction method thereof |
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| JPH01315520A (en) * | 1988-06-14 | 1989-12-20 | Shimizu Corp | Underground outer wall constructing method for superstructure |
| JPH05209408A (en) * | 1992-01-30 | 1993-08-20 | Takenaka Komuten Co Ltd | Constructing continuous steel wall or the like in high resistance force |
| JP2006249807A (en) * | 2005-03-11 | 2006-09-21 | Nippon Steel Corp | Steel-made member of corner section of continuous underground wall, continuous underground wall using the same and connection method of steel-made continuous walls in different directions |
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| CN115467321A (en) * | 2022-03-25 | 2022-12-13 | 湖南大学 | Two-wall-in-one multi-cavity type steel reinforced concrete composite structure and construction method thereof |
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