CN106087975B - Pile top ring beam structure based on SMW (soil mixing wall) construction method and construction method thereof - Google Patents
Pile top ring beam structure based on SMW (soil mixing wall) construction method and construction method thereof Download PDFInfo
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- CN106087975B CN106087975B CN201610455119.7A CN201610455119A CN106087975B CN 106087975 B CN106087975 B CN 106087975B CN 201610455119 A CN201610455119 A CN 201610455119A CN 106087975 B CN106087975 B CN 106087975B
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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
- E02D5/20—Bulkheads or similar walls made of prefabricated parts and concrete, including reinforced concrete, in situ
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Abstract
The invention discloses a pile top ring beam structure based on an SMW (soil mixing wall) construction method and a construction method thereof. It can be under the prerequisite that does not weaken top ring roof beam structural strength, rigidity, through with shaped steel depression, make the upper surface of top ring roof beam equals or is higher than the upper surface of shaped steel coats current apron and can form the passageway of cominging in and going out with the landing stage communicating to effectively practice thrift the space, and its accessible sets up the hole that exposes shaped steel hole for hoist in the ring roof beam, can ensure shaped steel again and retrieve.
Description
Technical Field
The invention relates to a pile top ring beam structure based on an SMW construction method and a construction method thereof.
Background
The SMW construction method pile (profile steel cement soil pile wall) enclosure structure starts in the eighties of the last century and is widely applied to foundation pit engineering of various depths at present. The cement soil wall of the pile in the SMW construction method can be used as a water stop measure of a building envelope, the strength of the cement soil wall only needs to meet the shearing resistance bearing capacity, and the shearing resistance bearing capacity can be completely met under the condition that the section steel space is small; the section steel is a main stressed member, and has the advantages of high strength, less consumption, cyclic utilization, high construction speed and high economic performance. Therefore, the SMW construction method pile enclosure structure becomes the first choice designed by engineers.
However, in the current construction method, the top of the general section steel is higher than the ring beam by more than 50cm so as to ensure that the section steel can be smoothly recycled after the construction is finished. This causes the following problems: 1) the profile steel is higher than the ground, if trestles need to be made in the foundation pit, or the space on the upper part of the ring beam needs to be utilized because of the limit of the peripheral space of the foundation pit, the higher profile steel becomes the obstruction of the vehicle and the pedestrian; 2) the field environment is poor; 3) causing space waste and section steel waste.
Disclosure of Invention
The invention aims to provide a pile top ring beam structure based on an SMW construction method and a construction method thereof, wherein the section steel pressure is lower than that in the ring beam, so that the upper part of the top ring beam can be used as a pedestrian and vehicle passage on the premise of not weakening the strength and the safety; the holes exposed out of the section steel hoisting holes are formed in the ring beam, so that the section steel can be smoothly hoisted and recovered.
In order to solve the technical problems, the invention provides the following technical scheme:
the utility model provides a SMW worker method pile bolck collar tie beam structure, is including setting up the top collar tie beam on a plurality of cement mixing piles, and shaped steel has been put to some or whole cement mixing piles interpolation, the top collar tie beam is reinforced concrete bar structure, the upper surface of shaped steel stretches out the upper surface certain distance of cement mixing pile, the upper surface of top collar tie beam equals or is higher than the upper surface of shaped steel, the hole is seted up to the upper portion of top collar tie beam corresponding each shaped steel, a hole for hoist is seted up on the upper portion of shaped steel, sets up on the shaped steel the position of hole for hoist exceeds the top collar tie beam the bottom of hole, just the hole for hoist is located the hole that corresponds respectively.
Preferably, in the above-mentioned SMW method pile top gird structure, the shape and size of the hole are matched with those of the section steel.
Preferably, in the above-mentioned SMW method pile top gird structure, the hole has a rectangular shape.
Preferably, in the ring beam structure on the top of the SMW pile, the width of the hole along the transverse direction of the foundation pit is: the height (H) of the section steel and the thickness (b) of the wood pattern are 2; the length of the holes along the longitudinal direction of the foundation pit is as follows: the width (W) of the section steel and the thickness (b) of the wood model are added.
Preferably, in the above-mentioned SMW method pile top ring beam structure, the bottom of the hoisting hole is 50mm higher than the bottom of the hole.
Preferably, in the above SMW method pile top ring beam structure, a passage cover plate for covering the hole is provided on the top of the top ring beam.
Preferably, in the above-described SMW-process pile-top gird structure, the passing cover plate is a steel plate or a wood plate.
The invention also discloses a construction method of the pile top ring beam structure based on the SMW construction method, which comprises the following steps:
firstly, completing the construction of a cement-soil mixing pile, and inserting section steel in place according to the requirement;
secondly, excavating a top ring beam groove and binding reinforcing steel bars;
thirdly, arranging a bottom die and a side die of the top ring beam;
fourthly, fixing a wood pattern at the position where the hole needs to be reserved;
fifthly, continuously pouring concrete;
sixthly, maintaining the top ring beam;
seventhly, filling plain soil in the holes;
and step eight, covering the passing cover plate.
Preferably, in the construction method of the pile top ring beam structure according to the SMW method, the steel plate or the wood plate serves as a passage for a vehicle or a pedestrian.
Preferably, in the construction method of the top ring beam structure of the SMW-method pile, when the section steel needs to be recovered, the passing cover plate is lifted, the plain soil is manually excavated, the top ring beam is chiseled, and finally the recovered section steel is pulled up.
According to the technical scheme disclosed above, compared with the prior art, the pile top ring beam structure based on the SMW construction method and the construction method thereof have the following beneficial effects:
according to the SMW construction method pile top ring beam structure and the construction method thereof, on the premise that the strength and the rigidity of the top ring beam structure are not weakened, the section steel is pressed down, so that the upper surface of the top ring beam is equal to or higher than the upper surface of the section steel, a passing cover plate is covered on the top ring beam, and then a trestle can be connected to form an access channel; especially under the condition of tense surrounding environment, the upper part of the device can be used as a pedestrian and vehicle passage, so that the space can be greatly saved.
Secondly, according to the SMW construction method pile top ring beam structure and the construction method thereof, the upper portion of the top ring beam is provided with holes corresponding to the section steels, the upper portions of the section steels are provided with hoisting holes, the section steels are higher than the bottoms of the holes, the hoisting holes are respectively positioned in the corresponding holes, and the section steels can be ensured to be smoothly recycled by arranging the holes exposing the section steel hoisting holes in the ring beam.
Thirdly, according to the pile top ring beam structure based on the SMW construction method and the construction method thereof, the diaphragm wall can be continuously poured, and convenience and rapidness are realized.
Drawings
Fig. 1 is a schematic structural view of a ring beam structure and a support beam of a SMW method pile top according to an embodiment of the present invention.
Fig. 2 is a schematic structural view of a ring beam structure on a top of a pile constructed by an SMW method according to an embodiment of the present invention.
Fig. 3 is a structural top view of a ring beam structure of a top of a pile constructed by the SMW method according to an embodiment of the present invention.
Fig. 4 is a partial schematic view of a ring beam structure of a top of a pile constructed by the SMW method according to an embodiment of the present invention.
In the figure: 1-cement soil mixing pile; 2-section steel; 3-top ring beam; 4-wood pattern; 5-hoisting holes; 6-passing cover plate; 7-holes; 8-stacked bridge plates; 9-supporting beam.
Detailed Description
The following provides a further detailed description of a ring beam structure of a pile top in an SMW method and a construction method thereof, in accordance with the accompanying drawings and specific embodiments. Advantages and features of the present invention will become apparent from the following description and from the claims. The technical contents and features of the present invention will be described in detail below with reference to the embodiments illustrated in the accompanying drawings. It is further noted that the drawings are in greatly simplified form and are not to precise scale, merely for the purpose of facilitating and distinctly claiming the embodiments of the present invention. For convenience of description, the directions of "up" and "down" described below are the same as the directions of "up" and "down" in the drawings, but this is not a limitation of the technical solution of the present invention.
Example one
In the embodiment, the foundation pit construction is taken as an example, the depth of the foundation pit is 10-15 m, the foundation pit enclosure structure adopts an SMW construction method pile, in the embodiment, the diameter of a cement soil mixing pile 1 of the SMW construction method pile is 850mm @600, and the cement soil mixing pile is overlapped by 250 mm; the section steel 2 is H700X 300X 13X 24 and is arranged at intervals of 1200 mm. The composition and structure of the ring beam structure on the top of the pile constructed by the SMW method according to the present embodiment will be described with reference to fig. 1 and 4. This pile top ring beam structure of SMW worker method, including setting up top ring beam 3 on a plurality of cement mixing piles 1, partial or whole cement mixing piles 1 interpolation has shaped steel 2, top ring beam 3 is reinforced concrete bar structure, the upper surface of shaped steel 2 stretches out the upper surface certain distance of cement mixing piles 1, the upper surface of top ring beam 3 equals or is higher than the upper surface of shaped steel 2, the upper portion of top ring beam 3 corresponds each shaped steel 2 and offers hole 7, a hole for hoist 5 is offered on the upper portion of shaped steel 2, set up on the shaped steel 2 the position of hole for hoist 5 is higher than top ring beam 3 the bottom of hole 7, promptly the position that sets up on the shaped steel 2 hole for hoist 5 is than top ring beam 3 the bottom of hole 7 is high.
On one hand, the top ring beam structure of the SMW construction method pile according to the embodiment can be formed by pressing down the section steel 2 on the premise of not weakening the strength and rigidity of the top ring beam structure, so that the upper surface of the top ring beam 3 is equal to or higher than the upper surface of the section steel 2, and the top ring beam is covered with the passing cover plate 6 and then can be connected with the stacked bridge plate 8 on the support beam 9 (the portion above the dotted line of the support beam 9 in fig. 1 is the stacked bridge plate 8), so as to form an access passage, and particularly under the condition that the peripheral space is narrow and limited in passing, the top ring beam structure can be used as a pedestrian passage and a vehicle passage, so that the space. On the other hand, in the top ring beam structure of the SMW method pile according to the embodiment, the holes 7 are formed in the upper portion of the top ring beam 3 corresponding to the positions of the section steels 2, the section steels 2 are higher than the bottoms of the holes 7, and the hoisting holes 5 of the section steels 2 are respectively located in the corresponding holes 7, so that the hoisting mechanism can hoist the section steels 2 in the holes 7, and the smooth recovery of the section steels 2 is ensured.
In order to ensure sufficient structural strength and rigidity of the top ring beam 3, the size of the hole 7 of the top ring beam 3 should be as small as possible as long as concrete can be isolated. In the SMW method pile top ring beam structure of the present embodiment, the shape and size of the hole 7 are matched with those of the section steel 2. Since the section steel 2 in this embodiment is H-shaped steel, in the above-mentioned ring beam structure on the top of the SMW method pile, the cross section of the hole 7 is rectangular.
Preferably, in the above-mentioned ring beam structure on the top of the SMW pile, the width of the hole 7 along the transverse direction of the foundation pit is: the height (H) of the section steel 2 and the thickness (b) of the wood pattern are 2; the length of the hole 7 along the longitudinal direction of the foundation pit is as follows: the width (W) of the section steel 2 and the thickness (b) of the wood pattern are added. The arrangement is such that the size of the aperture 7 is as small as possible, ensuring sufficient structural strength and rigidity of the top ring beam 3. In the embodiment, as shown in fig. 1, in the SMW-process pile, the cross section of the top ring beam 3 may be 1200mm by 1000mm, and the hole 7 may be 500mm deep. The wood pattern 4 is used for pouring the hole 7. The thickness of the wood pattern 4 is 10mm, so that the size of the holes 7 is 720mm x 320mm x 500 mm. In order to facilitate the hoisting of the profile steel 2, preferably, in the above-mentioned SMW method pile top ring beam structure, the bottom of the hoisting hole 5 is higher than the bottom of the hole 7 by 50 mm.
Preferably, in the above-described SMW-method pile top ring beam structure, a passage cover plate 6 for covering the hole 7 is provided on the top of the top ring beam. As shown in FIG. 1, the holes 7 can be covered with steel plates or wood plates with thickness of 6mm or more as the passing cover plates 6 to form the traffic lane surfaces.
Example two
With reference to fig. 1 to 4, the present invention further provides a construction method of a pile top ring beam structure according to the SMW method, including the following steps:
firstly, the construction of the cement-soil mixing pile 1 is completed, and the section steel 2 is inserted in place as required.
And secondly, excavating a groove 3 of the top ring beam and binding reinforcing steel bars.
And thirdly, arranging a bottom die and a side die of the top ring beam 3.
And fourthly, fixing the wood pattern 4 at the position where the hole 7 needs to be reserved.
And fifthly, continuously pouring concrete. Because the diaphragm wall can be poured in succession, consequently, construction convenience is swift.
And sixthly, maintaining the top ring beam 3.
And seventhly, filling plain soil in the holes 7. In the use process, plain soil is filled in the holes 7, so that force transfer can be ensured, and the holes are easy to clean.
And step eight, covering a passing cover plate 6, wherein the passing cover plate 6 can be used as a passage for driving or pedestrians, and the passing cover plate 6 can be a steel plate or a wood plate. After the use is finished, the passing cover plate 6 can be lifted and removed at any time.
Preferably, in the construction method of the top ring beam structure of the SMW method, after the eighth step, when the section steel 2 needs to be recovered, the passing cover plate is lifted, the plain soil is manually removed, the top ring beam is chiseled, and finally the recovered section steel is pulled up. Namely, the section steel is recovered through the steps of lifting the passing cover plate → manually excavating the plain soil → chiseling the top ring beam 3 → lifting and pulling the recovered section steel 2. The upper part of the top ring beam 3 is provided with the holes 7 corresponding to the positions of the section steels 2, the section steels 2 are higher than the bottoms of the holes 7, and the hoisting holes 5 of the section steels 2 are respectively positioned in the corresponding holes 7, so that the hoisting mechanism can hoist the section steels 2 in the holes 7, and the smooth recovery of the section steels 2 is ensured.
The above description is only for the purpose of describing the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention, and any variations and modifications made by those skilled in the art based on the above disclosure are within the scope of the appended claims.
Claims (8)
1. The construction method of the pile top ring beam structure based on the SMW construction method is characterized in that the pile top ring beam structure based on the SMW construction method comprises a top ring beam arranged on a plurality of cement mixing piles, section steel is inserted into part or all of the cement mixing piles, the top ring beam is of a reinforced concrete strip structure, the upper surface of the section steel extends out of the upper surface of the cement mixing piles for a certain distance, the upper surface of the top ring beam is equal to or higher than the upper surface of the section steel, holes are formed in the upper portion of the top ring beam corresponding to the section steel, a hoisting hole is formed in the upper portion of the section steel, the position of the hoisting hole formed in the section steel is higher than the bottom of the hole of the top ring beam, and the hoisting holes are respectively located in the corresponding holes, and the method comprises the following steps:
firstly, completing the construction of a cement-soil mixing pile, and inserting section steel in place according to the requirement;
secondly, excavating a top ring beam groove and binding reinforcing steel bars;
thirdly, arranging a bottom die and a side die of the top ring beam;
fourthly, fixing a wood pattern at the position where the hole needs to be reserved;
fifthly, continuously pouring concrete;
sixthly, maintaining the top ring beam;
seventhly, filling plain soil in the holes;
and step eight, covering the passing cover plate.
2. The construction method of a SMW process pile top ring beam structure according to claim 1, wherein the access cover plate is used as a passage for a vehicle or a pedestrian.
3. The construction method of a top ring beam structure of a SMW process according to claim 1, wherein when the sectional steel is required to be recovered, the passing cover plate is opened, then the plain soil is manually excavated, then the top ring beam is chiseled, and finally the recovered sectional steel is pulled up.
4. The construction method of a pile top ring beam structure according to the SMW process of claim 1, wherein the shape and size of the hole are matched with the shape steel.
5. The method of constructing a SMW process pile top ring beam structure according to claim 1, wherein the hole is formed in a rectangular shape.
6. The construction method of a pile top ring beam structure according to the SMW method of claim 1, wherein the width of the hole in the lateral direction of the foundation pit is: the height (H) of the section steel and the thickness (b) of the wood pattern are 2; the length of the holes along the longitudinal direction of the foundation pit is as follows: the width (W) of the section steel and the thickness (b) of the wood model are added.
7. The construction method of a pile top ring beam structure according to the SMW process of claim 1, wherein the bottom of the lifting hole is higher than the bottom of the hole by 50 mm.
8. The construction method of a pile top ring beam structure according to the SMW process of claim 1, wherein the passing cover plate is a steel plate or a wood plate.
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| CN201510812941X | 2015-11-20 | ||
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| CN101509263A (en) * | 2009-03-09 | 2009-08-19 | 上海隧道工程股份有限公司 | Digging method foundation pit structure of steel cover and plate cover, and construction method |
| CN103758134B (en) * | 2014-01-24 | 2015-09-30 | 中国建筑股份有限公司 | A kind of construction method combining Double-row Piles Support system |
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Effective date of registration: 20210702 Address after: 13 / F, 525 Jianguo East Road, Huangpu District, Shanghai 200025 Patentee after: SHANGHAI URBAN TRANSPORTATION DESIGN INSTITUTE Co.,Ltd. Address before: 200092 No. two, 901 North Road, Yangpu District, Shanghai, Zhongshan Patentee before: SHANGHAI MUNICIPAL ENGINEERING DESIGN INSTITUTE (Group) Co.,Ltd. |