CN211735542U

CN211735542U - Pit-in-pit pile counter-force core mold construction device

Info

Publication number: CN211735542U
Application number: CN201922211527.XU
Authority: CN
Inventors: 唐其胜; 何淮岚; 王卫中; 王晓飞; 陈�胜; 陈辉
Original assignee: Zhejiang Sanjian Construction Group Co Ltd
Current assignee: Zhejiang Sanjian Construction Group Co Ltd
Priority date: 2019-12-11
Filing date: 2019-12-11
Publication date: 2020-10-23
Anticipated expiration: 2029-12-11

Abstract

The utility model discloses a counter-force core mould construction device for a pit-in-pit pile, which comprises a core mould, a stand column and a plurality of steel bar pull rods; the core mould is a closed frame structure formed by enclosing a plurality of steel templates, the core mould is positioned in the pit, the upright post is vertically fixed at the center of the upper surface of the core mould, one end of a plurality of steel bar pull rods is fixed on the upright post, and the other end of the steel bar pull rods is connected with steel bars in the enclosure piles, the support piles or the cast-in-place piles around the pit. The utility model discloses in set up the stand above the mandrel, set up the reinforcing bar pull rod around the stand, the reinforcing bar connection in fender pile, a fender pile or the bored concrete pile around reinforcing bar pull rod and the hole well hole, when concreting, the buoyancy that the mandrel produced is offset by the antigravity that the stand was applyed on the mandrel, buoyancy is big more, reaction force is big more, ensures that the mandrel can not come-up, and each face of mandrel is all sealed, can not leak thick liquid, satisfies the requirement of high quality construction.

Description

Pit-in-pit pile counter-force core mold construction device

Technical Field

The utility model relates to an anti device that floats of construction usefulness, concretely relates to hole stake counter-force mandrel construction equipment in hole.

Background

When the pit-in-pit construction such as a water accumulation pit, an elevator pit and the like is carried out, the pit-in-pit is dug at the bottom of the pit, when concrete is poured, a template is placed in the pit-in-pit, and the position of the template forms an elevator shaft or a water accumulation pit and the like which are positioned at the bottom of the pit bottom after the pouring is finished.

In pit-in-pit construction, the template should be sealed, otherwise slurry leakage can be caused, so most construction units adopt the template to build a square structure with an open top, and a heavy object is filled into the square structure from the open top to resist buoyancy generated at the bottom die. However, the method has poor effect, the phenomenon of template floating can still occur, and the engineering quality is seriously influenced.

In order to ensure that the influence of template floating is eliminated, there are some special researches, such as the publication number: CN204266590U discloses a ponding hole, elevator shaft template die block anti-floating device. The template is connected with the bottom ribs on the side surface of the foundation pit by adopting a plurality of counter-pulling screw rods, and the template is hopefully fixed at the installation position by utilizing the counter-pulling screw rods so as to counteract the generated buoyancy. However, in actual construction, the scheme has more problems, firstly, because the surface of the template can not form a stable pulling node, in the middle of the comparison, the pulling node is arranged in the template, the intersection point of the main keel and the secondary keel in the template is used as the pulling node of the counter-pulling bolt, although the stability of the pulling node can be ensured, the most important construction requirements of the template at the position are violated, namely: the template is sealed and cannot leak slurry; in addition, the atress direction of split bolt is unanimous basically with the buoyancy direction in this scheme, only will originally be shared the bottom muscle to the foundation ditch side by the buoyancy that the template bore, nevertheless discovery when actual construction, when buoyancy is enough big, the bottom muscle of foundation ditch side is not enough to hole buoyancy, and many times, the template can lead to the bottom muscle deformation of foundation ditch side even, not only fails to solve the problem of template come-up like this, has still brought new influence construction quality's safety problem.

Disclosure of Invention

The purpose of the invention is as follows: the utility model aims to provide a pit in pit stake counter-force mandrel construction equipment to prior art not enough, under the prerequisite that does not influence the mandrel leakproofness, ensure that the come-up can not appear in the mandrel.

The technical scheme is as follows: the utility model discloses a pit-in-pit pile counterforce core mould construction device, which comprises a core mould, a stand column and a plurality of steel bar pull rods;

the core mould is a closed frame structure formed by enclosing a plurality of steel templates, the core mould is positioned in the pit, the upright post is vertically fixed at the center of the upper surface of the core mould, one end of a plurality of steel bar pull rods is fixed on the upright post, and the other end of the steel bar pull rods is connected with steel bars in the enclosure piles, the support piles or the cast-in-place piles around the pit.

The utility model discloses further preferred technical scheme does, still be provided with a fixed plate between the upper surface of stand and mandrel, the stand is fixed on the fixed plate, the fixed plate is pressed and is pasted the upper surface of mandrel.

Preferably, a plurality of oblique supporting rods are arranged between the upright post and the fixing plate, one end of each oblique supporting rod is fixed at the lower part of the upright post, and the other end of each oblique supporting rod is fixed at the periphery of the fixing plate.

Preferably, each steel bar pull rod is further provided with a turn buckle for adjusting the pretightening force of the steel bar pull rod.

Preferably, the upright column is formed by splicing a plurality of sections of steel pipes, and two adjacent sections of steel pipes are fixed through bolts.

Preferably, the height of the upright is determined by the angle between the steel bar pull rod and the upright, and the angle between the steel bar pull rod and the upright is not more than 40 degrees.

Preferably, the core mold is a hollow frame structure, and a scaffold for supporting the inner wall of the core mold is arranged in the core mold.

Has the advantages that: (1) in the utility model, the upright post is arranged above the core die, the reinforcing steel bar pull rods are arranged around the upright post and connected with the reinforcing steel bars in the fender post, the support post or the cast-in-place pile around the pit, when concrete is poured, the buoyancy generated by the core die is counteracted by the counter-gravity exerted on the core die by the upright post, the larger the buoyancy is, the larger the counter-force is, the more the core die is ensured not to float upwards, and each surface of the core die is sealed, so that slurry leakage is avoided, and the requirement of high-quality construction is met;

(2) in the utility model, the fixing plate is arranged between the upright post and the core mould and is pressed and pasted on the upper surface of the core mould, so that the force transmitted by the upright post uniformly acts on the core mould; in order to prevent the upright from being unstable, the fixing plate of the utility model is provided with the oblique supporting rod which is supported around the upright;

(3) in the utility model, in order to ensure that the acting force applied to the core mould by the upright post can sufficiently offset the buoyancy of the core mould, the angle between the steel bar pull rod and the upright post is limited, if the angle can not reach the specified requirement, the height of the upright post is increased, and the stress system is ensured to be reasonable;

(4) the utility model discloses in set up supporting legs hand rack in the mandrel, place the mandrel and appear warping under the upper and lower pressure.

Drawings

Fig. 1 is a schematic structural view of a pit-in-pit pile reaction force core mold construction device of the present invention;

FIG. 2 is a schematic diagram of a foundation pit after concrete pouring is completed by adopting the device of the present invention;

in the figure, 1-core mould, 2-upright post, 3-steel bar pull rod, 4-fixing plate and 5-oblique supporting rod.

Detailed Description

The technical solution of the present invention is described in detail below with reference to the accompanying drawings, but the scope of the present invention is not limited to the embodiments.

Example (b): a counter-force core mould construction device for a pit-in-pit pile is shown in figure 1 and comprises a core mould 1, a stand column 2 and a plurality of steel bar pull rods 3.

The core mould 1 is a closed frame structure formed by enclosing a plurality of steel templates, the core mould 1 is a hollow frame structure, and a scaffold for supporting the inner wall of the core mould 1 is arranged in the core mould 1. The mandrel 1 is located within the pit in the pit.

The upright post 2 is fixed at the center vertical to the upper surface of the core mould 1, a fixing plate 4 is arranged between the upright post 2 and the upper surface of the core mould 1, the upright post 2 is fixed on the fixing plate 4, and the fixing plate 4 is pressed on the upper surface of the core mould 1. A plurality of inclined supporting rods 5 are arranged between the upright post 2 and the fixing plate 4, one end of each inclined supporting rod 5 is fixed at the lower part of the upright post 2, and the other end of each inclined supporting rod 5 is fixed around the fixing plate 4. The upright column 2 is formed by splicing a plurality of sections of steel pipes, and two adjacent sections of steel pipes are fixed through bolts.

One end of a plurality of steel bar pull rods 3 is fixed on the upright post 2, and the other end is connected with steel bars in a fender pile, a support pile or a cast-in-place pile around the pit. Each steel bar pull rod 3 is also provided with a turn buckle for adjusting the pretightening force of the steel bar pull rod 3. The height of the upright post 2 is determined by the angle between the steel bar pull rod 3 and the upright post 2, and the angle between the steel bar pull rod 3 and the upright post 2 is not more than 40 degrees.

And pouring concrete into the foundation pit and the pit middle pit, after the concrete is initially set, firstly removing the steel bar pull rod 3 and the upright post 2, then removing the core mould 1, completing construction, and reserving a lower elevator shaft in the constructed foundation pit.

As mentioned above, although the present invention has been shown and described with reference to certain preferred embodiments, it should not be construed as limiting the invention itself. Various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A pit-in-pit pile counterforce core mould construction device is characterized by comprising a core mould, a stand column and a plurality of steel bar pull rods;

2. The pit-in-pit pile counterforce core mold construction device of claim 1, characterized in that a fixing plate is further arranged between the upright column and the upper surface of the core mold, the upright column is fixed on the fixing plate, and the fixing plate is pressed against the upper surface of the core mold.

3. The pit-in-pit pile reaction force core mold construction device as claimed in claim 2, wherein a plurality of diagonal support rods are provided between the vertical column and the fixed plate, one end of each diagonal support rod is fixed to the lower portion of the vertical column, and the other end of each diagonal support rod is fixed to the periphery of the fixed plate.

4. The pit-in-pit pile counterforce core mold construction device of claim 1, wherein each steel bar pull rod is further provided with a turn buckle for adjusting the pretightening force of the steel bar pull rod.

5. The pit-in-pit pile counterforce core mold construction device of claim 1, characterized in that the upright column is formed by splicing a plurality of sections of steel pipes, and two adjacent sections of steel pipes are fixed through bolts.

6. The pit-in-pit pile reaction core mold construction device according to claim 5, wherein the height of the upright is determined by an angle between the steel bar tie and the upright, and the angle between the steel bar tie and the upright is not more than 40 °.

7. The pit-in-pit pile counterforce core mold construction device of claim 1, characterized in that the core mold is a hollow frame-shaped structure, and a scaffold for supporting the inner wall of the core mold is arranged in the core mold.