CN217998096U

CN217998096U - Foundation pit support temporary supporting device

Info

Publication number: CN217998096U
Application number: CN202222393816.8U
Authority: CN
Inventors: 王代发; 李占闯; 陈晨
Original assignee: China 22MCC Group Corp Ltd
Current assignee: China 22MCC Group Corp Ltd
Priority date: 2022-09-09
Filing date: 2022-09-09
Publication date: 2022-12-09
Anticipated expiration: 2032-09-09

Abstract

The utility model provides a temporary support device for foundation pit support relates to foundation pit support technical field. The device comprises a support upright post, a support plate, a waterproof wing plate and a ox horn support, wherein a cast-in-place pile is arranged in a foundation pit. The vertical setting of support post, the top and the backup pad of support post are connected, and the dress is worn in the steel reinforcement cage of bored concrete pile to support post bottom, and the support post is connected with the steel reinforcement cage, and the cover is equipped with waterproof pterygoid lamina on the support post that is located steel reinforcement cage top, is connected with the ox horn support that the level set up on the support post lateral wall that is located waterproof pterygoid lamina top. This device utilizes the bored concrete pile as the strong point of support post, and the basis is firm, supports temporarily through the horizontal support crossbeam of support post to foundation ditch fender pile, prevents horizontal crossbeam's downwarping and unstability to strengthen the intensity and the rigidity of support system, guarantee structure safety.

Description

Foundation pit support temporary supporting device

Technical Field

The utility model relates to a foundation ditch support technical field especially relates to an interim strutting arrangement of foundation ditch support.

Background

In the field of construction, deep foundation pit supporting modes mainly comprise steel sheet piles, row piles, soil nailing walls, continuous walls and the like. For the engineering with an underground pile foundation as bearing capacity, particularly for buildings such as a multi-cabin underground comprehensive pipe gallery, a slag flushing ditch, an underground box type foundation, a pool and the like with clear width dimension more than 10 meters and supported by steel sheet piles or row piles, when the excavation size of a foundation pit is large, a supporting pile can not meet the requirement of safety production by only depending on a side wall cantilever supporting pile, a supporting pile and an inner supporting structure system are required to be adopted, namely, a horizontal support and an inclined support are added on a top beam and an enclosing purlin of the side wall supporting pile, and an integral stable supporting system is formed. However, when the horizontal supporting beam exceeds a certain length, the horizontal supporting beam can cause the problems of downwarping and deformation instability under the combined action of the self weight and the lateral pressure of the foundation pit, the structure loses stability, and potential safety hazards are generated.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims at providing an excavation supporting temporary support device to solve above-mentioned problem.

Based on the above-mentioned purpose, the utility model provides an interim strutting arrangement of excavation supporting, include: the foundation pit is internally provided with a cast-in-place pile; the vertical setting of support post, support post's top is connected with the backup pad, and the dress is worn in the steel reinforcement cage of bored concrete pile to the support post bottom, and support post is connected with the steel reinforcement cage, and the cover is equipped with waterproof pterygoid lamina on the support post that is located steel reinforcement cage top, is connected with the ox horn support that the level set up on the support post lateral wall that is located waterproof pterygoid lamina top.

Compared with the prior art, the beneficial effects of the utility model reside in that: the cast-in-place pile is used as a supporting point of the supporting stand column, the foundation is stable, the horizontal supporting cross beam of the foundation pit supporting pile is temporarily supported through the supporting stand column, and the horizontal cross beam is prevented from being warped downwards and unstable, so that the strength and rigidity of a supporting system are enhanced, and the structure safety is ensured.

Further, this device still includes the bracing, and the bracing slope sets up, and the one end and the support post lateral wall of bracing are connected, and the other end and the ox horn leg joint of bracing. The support strength of the ox horn support is improved, and the support stability is ensured.

Further, the support column is any one of I-shaped steel, H-shaped steel, a steel pipe and a lattice column.

Furthermore, the lattice column comprises angle steels and lacing bars, the angle steels are enclosed to form a cuboid structure, and lacing bars are connected between adjacent angle steels; the stability of lattice column is stronger, ensures to carry out stable support to the supporting beam.

Further, a connecting rod is connected between adjacent supporting upright columns; and a space integral frame grid system is formed, so that the safety of the foundation pit is ensured.

Drawings

Fig. 1 is an elevation view of a temporary supporting device for supporting a foundation pit according to an embodiment of the present invention;

fig. 2 is a sectional view of a constructional column of the temporary supporting device for supporting a foundation pit provided by the embodiment of the invention;

fig. 3 is a sectional view of the foundation pit supporting temporary supporting device provided by the embodiment of the utility model.

Labeled as: 1. supporting the upright post; 2. a support plate; 3. a water wing panel; 4. a horn support; 5. filling a pile; 6. a reinforcement cage; 7. bracing; 8. angle steel; 9. lacing strips; 10. a cushion layer; 11. a base plate; 12. and supporting the cross beam.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the following embodiments.

As shown in fig. 1, the utility model provides a temporary supporting device for foundation pit support, by support post 1, backup pad 2, waterproof pterygoid lamina 3 and ox horn support 4 etc. constitute.

The support upright post 1 is vertically arranged, and the support upright post 1 is any one of I-shaped steel, H-shaped steel, steel pipes and lattice columns. As shown in fig. 2, the lattice column is composed of angle steels 8 and lacing bars 9, the four angle steels 8 enclose a cuboid structure, and the lacing bars 9 are fixedly connected between the adjacent angle steels 8. The top end of the support column 1 is connected with a support plate 2, and the support plate 2 is used for increasing the contact area with the support beam 12 and facilitating the fixation of the support beam 12.

The bottom of the support upright 1 is penetrated in a reinforcement cage 6 of the cast-in-place pile 5, the support upright 1 is fixedly connected with the reinforcement cage 6, and the bottom of the support upright 1 and the reinforcement cage 6 are together poured in a pile hole by concrete, so that the cast-in-place pile 5 is used as a support point of the support upright 1.

As shown in fig. 3, the supporting column 1 above the steel reinforcement cage 6 is sleeved with a waterproof wing plate 3, and when the bottom plate 11 is constructed, the waterproof wing ring is located at the middle layer of the bottom plate 11, so that water can be effectively stopped and a permeation channel can be blocked. Be connected with the ox horn support 4 of level setting on the 1 lateral wall of support post that is located 3 tops of waterproof pterygoid lamina, ox horn support 4 includes a plurality of. When the foundation ditch is darker, need also set up supporting beam 12 in the middle part, support supporting beam 12 through ox horn support 4. Ox horn support 4 and bracing 7's one end fixed connection, bracing 7 slope sets up, bracing 7's the other end and support post 1 lateral wall fixed connection.

When a plurality of supporting upright posts 1 need to be arranged for supporting, the adjacent supporting upright posts 1 are connected through connecting rods to form a spatial integral frame grid system, so that the safety of the foundation pit is ensured.

In the construction process, the method comprises the following steps:

step one, calculating the strength and rigidity conditions of the support upright 1 according to the length of the horizontal support beam 12 of the support pile and the depth of the foundation pit, and selecting I-shaped steel, H-shaped steel, steel pipes or lattice columns meeting the requirements as the support upright 1. And (3) penetrating the support upright 1 into the reinforcement cage 6, and welding the reinforcement cage 6 and the support upright 1 together. The supporting upright post 1 is vertically hoisted by a crane, and one end of the supporting upright post 1 connected with the reinforcement cage 6 is placed into the pile hole. Concrete is poured into the pile hole, a blocking rail can be arranged on the supporting upright post 1 to be fixed with the ground, the effective anchoring depth inserted into the pile hole is ensured, and sinking is prevented.

And step two, adopting support piles to support the foundation pit, placing the support beam 12 of the support piles on the support plate 2 at the top end of the support upright post 1, and fixing the support beam 12 and the support plate 2 together.

And step three, excavating the earthwork to the bottom elevation of the designed foundation cushion layer 10. When the foundation pit is deep and two horizontal supports need to be arranged, the bracket support is used as a beam pivot, and then the lower-layer earthwork excavation is continued.

And step four, when the foundation pit is excavated to the elevation of the bottom of the designed foundation cushion layer 10, breaking the pile head of the cast-in-place pile 5, and cleaning up the floating soil and sludge on the support upright posts 1. Then, the waterproof wing plate 3 is arranged on the supporting upright post 1, and the waterproof wing ring is positioned at the middle layer of the bottom plate 11 after the bottom plate 11 is constructed.

And step five, constructing the foundation slab 11. Firstly, pouring the cushion layer 10 at the bottom of the foundation pit, binding reinforcing steel bars after the construction of the cushion layer 10 is completed, enabling the reinforcing steel bars to bypass the supporting upright posts 1, welding the reinforcing steel bars with the supporting upright posts 1 when the reinforcing steel bars cannot be avoided, and finally pouring concrete of the foundation slab 11.

And step six, when the construction of the side wall of the foundation is finished and the side wall of the foundation can be detached, cutting the exposed support upright posts 1. The supporting upright posts 1 are isolated from the upper part of the bottom plate 11 by adopting filling materials, and the filling materials adopt polyphenyl plates or elastic materials. The bottom plate 11 is further poured, and the filling material is taken out after the concrete is poured. When the supporting upright post 1 is cut, the height of the supporting upright post is lower than the top elevation of the bottom plate 11, the concrete is not damaged, and waterproof concrete is adopted for plugging.

When the foundation ditch is great longer, set up a plurality of support post 1, each support post 1 evenly distributed adopts interim connecting rod to connect between the adjacent support post 1, forms the whole frame grid system in space, guarantees the safety of foundation ditch.

The embodiments of the invention are intended to embrace all such alternatives, modifications and variances which fall within the broad scope of the appended claims. Therefore, any omissions, modifications, substitutions, improvements and the like that may be made without departing from the spirit and principles of the invention are intended to be included within the scope of the invention.

Claims

1. An excavation supporting temporary support device, comprising: the foundation pit is internally provided with a cast-in-place pile; it is characterized in that the preparation method is characterized in that,

the vertical setting of support post, the top and the backup pad of support post are connected, and the dress is worn in the steel reinforcement cage of bored concrete pile to support post bottom, and the support post is connected with the steel reinforcement cage, and the cover is equipped with waterproof pterygoid lamina on the support post that is located steel reinforcement cage top, is connected with the ox horn support that the level set up on the support post lateral wall that is located waterproof pterygoid lamina top.

2. The foundation pit support temporary supporting device according to claim 1, further comprising an inclined strut, wherein the inclined strut is obliquely arranged, one end of the inclined strut is connected with the side wall of the supporting upright post, and the other end of the inclined strut is connected with the ox horn bracket.

3. The foundation pit support temporary support device according to claim 1, wherein the support column is any one of an i-beam, an H-beam, a steel pipe and a lattice column.

4. The foundation pit support temporary support device of claim 3, wherein the lattice column comprises angle steel and lacing bars, the angle steel encloses a cuboid structure, and the lacing bars are connected between adjacent angle steel.

5. The foundation pit support temporary support device of claim 1, wherein a connecting rod is connected between adjacent support columns.