CN210684728U - Deep foundation pit supporting system suitable for multi-water foundation environment - Google Patents
Deep foundation pit supporting system suitable for multi-water foundation environment Download PDFInfo
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- CN210684728U CN210684728U CN201921559774.2U CN201921559774U CN210684728U CN 210684728 U CN210684728 U CN 210684728U CN 201921559774 U CN201921559774 U CN 201921559774U CN 210684728 U CN210684728 U CN 210684728U
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Abstract
The utility model relates to a construction technical field, concretely relates to deep basal pit support system suitable for many water ground environment, including the deep basal pit slot, the deep basal pit ditch inslot has been filled with cement thick liquid, is fixed with location shaped steel along its length direction in the both sides of deep basal pit slot, and two location shaped steels keep parallel, spanes a plurality of location channel-section steels that the equidistance is fixed above two location shaped steels, vertically between adjacent location channel-section steels has placed the H shaped steel that inserts in the cement thick liquid, and the laminating of two parallel boards of H shaped steel is on the inner wall of deep basal pit slot, and H shaped steel is fixed on the location channel-section steel through hanging the muscle. The deep foundation pit supporting system structure has the advantages of simple process, plane construction and no cold joint during construction, and can shorten the construction period; the supporting structure strengthens the water stop effect of the whole curtain, is suitable for areas such as a yunnan pool area, a groundwater rich area and a soft foundation, and ensures safe construction environment and construction quality by combining a special construction process.
Description
Technical Field
The utility model relates to a construction technical field, concretely relates to deep basal pit supporting system suitable for many water ground environment. The multi-water foundation environment comprises regions such as a yunnan pond region, a groundwater rich region, a soft foundation and the like.
Background
Along with the acceleration of the urbanization process of China, the development of underground space is more and more, and the construction of deep foundation pit engineering is more and more. But present deep basal pit supporting engineering is various, and many when facing areas such as yunnan pond region, groundwater rich area, soft ground, the supporting system need bear bigger water pressure, and cold joint appears easily when ordinary supporting construction uses this special topography, and the construction degree of difficulty is great, and construction period is longer, and when facing the water pressure of more degree of depth, the stagnant water effect is relatively poor moreover.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a deep basal pit support system suitable for many water ground environment, this deep basal pit support system structure, cold joint does not appear during simple process, plane construction, can shorten construction period.
In order to achieve the above purpose, the technical solution of the present invention is as follows:
deep basal pit struts system suitable for many water ground environment, including the deep basal pit slot, the deep basal pit ditch inslot is filled with cement thick liquid, both sides in the deep basal pit slot are fixed with location shaped steel along its length direction, location shaped steel utilizes the fixation card to fix subaerial, and two location shaped steels keep parallel on the last horizontal plane of deep basal pit slot, it has a plurality of location channel-section steels that the equidistance is fixed to span above two location shaped steels, vertical placing between adjacent location channel-section steels inserts the H shaped steel in the cement thick liquid, the laminating of two parallel plates of H shaped steel is on the inner wall of deep basal pit slot, H shaped steel passes through the hanger to be fixed on the location channel-section steel.
Further limiting, based on the length of the H-shaped steel, a lifting hole is drilled on a transverse plate at the end of the H-shaped steel.
Further inject, all weld the reinforcing plate in the diaphragm both sides that H shaped steel bored the lewis hole one end, the both ends of reinforcing plate support on two parallel boards of H shaped steel.
Further defined, the surface of the H-shaped steel is coated with a friction reducer.
Further limiting, after the H-shaped steel is inserted into the cement slurry, the upper end of the H-shaped steel is higher than the height of the upper edge of the deep foundation pit groove.
Further limiting, the spacing distance between two adjacent positioning channel steels is the height size of the H-shaped steel, and the error of the spacing distance is less than 2 cm.
The utility model has the advantages that: the deep foundation pit supporting system structure is simple in process, does not have cold joints during plane construction and construction, and can shorten the construction period. The installation of location channel-section steel and location shaped steel helps the effect of its location when H shaped steel below, saves the trouble that the workman drawn the location line to can also keep its straightness that hangs down when H shaped steel is transferred. The supporting structure strengthens the water stop effect of the whole curtain, is suitable for areas such as a yunnan pool area, a groundwater rich area and a soft foundation, and ensures safe construction environment and construction quality by combining a special construction process.
Drawings
FIG. 1 is a schematic view of the three-dimensional structure of the positioning section steel and the positioning channel steel of the present invention installed and fixed on the groove of the deep foundation pit;
FIG. 2 is a schematic perspective view of H-shaped steel;
fig. 3 is a schematic view of the structure of the present invention.
Detailed Description
In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand, the present invention will be further described with reference to the following embodiments.
As shown in fig. 1, fig. 2, the deep basal pit supporting system who is applicable to many water foundation environment that fig. 3 shows, including deep basal pit slot 1, the cement thick liquid 2 has been poured into in the deep basal pit slot 1, be fixed with location shaped steel 3 along its length direction in deep basal pit slot 1's both sides, location shaped steel 3 utilizes fixing clip 4 to fix subaerial, and two location shaped steel 3 keep parallel on deep basal pit slot 1's last horizontal plane, 3 sides span have a plurality of location channel-section steels 5 that the equidistance is fixed on two location shaped steel, it is fixed to carry out interconnect with spot welding when necessary, vertical placing the H shaped steel 6 that inserts in the cement thick liquid between adjacent location channel-section steel 5, two parallel plate laminating of H shaped steel 6 are on the inner wall of deep basal pit slot 1, H shaped steel 6 is fixed on location channel-section steel 5.
Preferably, on the basis of the length of the H-shaped steel 6, a lifting hole 61 is drilled on a transverse plate at the end of the H-shaped steel 6, so that a crane can conveniently hang and lift. Preferably, both sides of the transverse plate at the end of the H-shaped steel 6 with the hanging hole are welded with the reinforcing plates 62, both ends of the reinforcing plates 62 are abutted against the two parallel plates of the H-shaped steel 6, and the reinforcing welding of the reinforcing plates 62 avoids the end head of the H-shaped steel 6 from deforming or breaking when the lifting machine suspends the H-shaped steel in a hanging manner.
Because the H-shaped steel 6 needs to be pulled out when the cement slurry 2 is placed in the H-shaped steel 6 after being lifted, the H-shaped steel 6 is not excessively worn when being pulled out, and the H-shaped steel 6 is convenient to recycle at the later stage, and the surface of the H-shaped steel 6 is coated with the antifriction agent. Before the antifriction agent is coated, dirt and rust on the surface of the H-shaped steel 6 are removed, the antifriction agent needs to be heated by an electric heating rod until the antifriction agent is completely melted, and the antifriction agent can be coated on the H-shaped steel 6 only when a stirring rod is used for stirring to feel that the antifriction agent is even in thickness, otherwise, the coating is uneven and is easy to peel off. If the surface of the section steel is wet in rainy and snowy days, the friction reducer can be coated only by wiping the surface with a rag, and the section steel cannot be directly coated on the wet surface, otherwise, the section steel is peeled off. After the surface of the H-shaped steel 6 is coated with the coating, once the coating cracks and peels off, the coating needs to be removed and the friction reducer needs to be coated again.
In order to lift and pull out the end of the H-shaped steel 6 by the crane in the later period, the upper end of the H-shaped steel 6 is higher than the upper edge of the cement slurry 2 after being inserted into the cement slurry 2 and is also slightly higher than the upper edge of the deep foundation pit groove 1.
The spacing distance between two adjacent positioning channel steels 5 is the height dimension A of the H-shaped steel 6, the spacing distance error is less than 2cm, the verticality of the H-shaped steel 6 inserted into the cement slurry is guaranteed, and the distance between the adjacent H-shaped steels 6 in the groove 1 of the deep foundation pit is even.
When the supporting system structure is built in the applicable geographic environment, the construction step machine process principle is as follows:
1. and (3) measurement lofting, namely accurately calculating the angular point coordinates (or rotation angular point coordinates) of the enclosure center line before construction, lofting the enclosure center line, and simultaneously preparing the guard piles.
2. Digging a groove: two positioning section steels are placed in the direction parallel to the groove, the working groove is dug in the direction parallel to the enclosure center line, and the width of the groove is determined according to the width of the enclosure structure. When underground obstacles exist in a site, the underground obstacles are completely broken by using a pick head machine, if overlarge holes are generated after the underground obstacles are broken, backfilling and compacting are needed, and a groove is dug again to ensure that construction is carried out smoothly.
3. Positioning and correcting a drilling machine: and (3) determining the position, moving the pile frame of the drilling machine in place, leveling the platform by using a leveling instrument before drilling, straightening the machine frame and ensuring that the machine frame is vertical.
4. Spraying slurry and stirring to form a pile: p42.5-grade ordinary portland cement is adopted, the water cement ratio of cement slurry is 1.5, the cement doping ratio is 20%, cement slurry which is uniformly stirred is injected into soil, the cement-soil stirring pile is fully stirred before initial setting, and cement and the soil to be reinforced are fully stirred, so that the reinforcing quality of the stirring pile is ensured.
5. H-shaped steel material selection and welding: a reinforcing plate 62 is welded on the two sides of the top end of the H-shaped steel 6, a lifting hole 61 is formed at a position 0.2m away from the top end of the H-shaped steel 6, and the hole diameter is 10 cm. If the length of the needed H-shaped steel 6 is not enough, the tailor-welding is needed, the welding seams are all full-broken welds, and after the weld is finished, the welding seams are polished to be as flat as the surface of the H-shaped steel by using a grinding wheel. The grade of the welding line is a secondary welding line, and a flaw detection test is required.
6. Inserting and fixing the H-shaped steel: the recycling of the H-shaped steel 6 is facilitated, the friction reducer is hot-coated in advance before the H-shaped steel 6 is inserted, and the H-shaped steel 6 is hung after the cement-soil mixing pile is constructed. The H-shaped steel 6 must be inserted within 3 hours after the construction of the mixing pile is finished, the deviation of the pile position is required to be not more than +/-20 mm, the elevation error is not more than +/-100 mm, and the deviation of the verticality is not more than 0.5 percent. When the H-shaped steel 6 is lowered, the H-shaped steel is slowly and vertically inserted into the cement slurry along the positioning channel steel 5, and the verticality is controlled by a plumb bob. When the H-shaped steel 6 is inserted to the designed elevation, the H-shaped steel 6 is fixed by the hanging ribs. And treating the overflowed cement soil, and controlling the cement soil to a certain elevation so as to facilitate the next procedure of construction. And after the cement slurry is hardened to a certain degree, removing the hanging ribs 7 and the positioning channel steel 5.
7. Removing H-shaped steel: the H-shaped steel 6 is exposed out of the ground and cannot be connected in series, otherwise, the connecting part must be cut off by oxygen and acetylene and ground by a polishing machine, and each pile head must be pulled out after two sides are pasted with welded steel plates.
It is right above the utility model provides a deep basal pit supporting system suitable for many water ground environment has carried out detailed introduction. The description of the specific embodiments is only for the purpose of helping understanding the method of the present invention and the core idea thereof, and it should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.
Claims (6)
1. Deep basal pit supporting system suitable for many water ground environment, including the deep basal pit slot, the deep basal pit ditch inslot is filled with cement thick liquid, its characterized in that: be fixed with location shaped steel along its length direction in the both sides of deep basal pit slot, location shaped steel utilizes the fixation card to fix subaerial, and two location shaped steels keep parallel on deep basal pit slot's last horizontal plane, it has a plurality of location channel-section steels that the equidistance is fixed to span above two location shaped steels, vertically between adjacent location channel-section steels place the H shaped steel that inserts in the cement thick liquid, the laminating of two parallel plates of H shaped steel is on the inner wall of deep basal pit slot, H shaped steel is fixed on the location channel-section steel through hanging the muscle.
2. The deep foundation pit supporting system suitable for the multi-water foundation environment according to claim 1, wherein: based on the length of the H-shaped steel, a transverse plate at the end of the H-shaped steel is drilled with a hanging hole.
3. The deep foundation pit supporting system suitable for the multi-water foundation environment according to claim 2, wherein: reinforcing plates are welded on two sides of a transverse plate at one end of the H-shaped steel where the hanging hole is drilled, and two ends of each reinforcing plate are abutted to two parallel plates of the H-shaped steel.
4. The deep foundation pit supporting system suitable for the multi-water foundation environment according to claim 3, wherein: the surface of the H-shaped steel is coated with a friction reducer.
5. The deep foundation pit supporting system suitable for the multi-water foundation environment according to claim 1, wherein: and after the H-shaped steel is inserted into the cement slurry, the upper end head of the H-shaped steel is higher than the height of the upper edge of the deep foundation pit groove.
6. The deep foundation pit supporting system suitable for the multi-water foundation environment according to claim 5, wherein: the spacing distance between two adjacent positioning channel steels is the height size of the H-shaped steel, and the error of the spacing distance is less than 2 cm.
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| CN201921559774.2U CN210684728U (en) | 2019-09-19 | 2019-09-19 | Deep foundation pit supporting system suitable for multi-water foundation environment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113756296A (en) * | 2021-09-13 | 2021-12-07 | 中铁隆工程集团有限公司 | Construction method of mixing pile wall |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113756296A (en) * | 2021-09-13 | 2021-12-07 | 中铁隆工程集团有限公司 | Construction method of mixing pile wall |
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