Preparation device of rock-socketed pile pull-out test model

Abstract

The utility model discloses a preparation device of a rock-socketed pile pull-out test model. The preparation device comprises a rock body preparation mold, a rock-socketed hole mold, a pile body mold and a hoisting frame. The rock mass preparation mold comprises a bottom mold and a side mold; the bottom die comprises a steel bottom plate and a set of bottom die supporting profile steel. Each side mold is defined by a transverse side mold plate and a longitudinal side mold plate; each transverse side template and each longitudinal side template comprise steel side plates and antifriction plates; the outer surface of each transverse side formwork is further provided with a set of side formwork supporting profile steel. A plurality of balls are mounted on the bottom surface of each transverse steel side plate and the bottom surface of each longitudinal steel side plate at intervals, so that the side dies are mounted on the channels of the bottom dies through the balls, and the two groups of side die supporting section steel are mounted on the top surfaces of two heads of one group of bottom die supporting section steel respectively; the rock-socketed hole mold is suspended at the upper part of the center of the inner cavity of the rock body preparation mold; the pile body mold is placed at the top of the rock-socketed hole; the hoisting frame is composed of a group of transverse and longitudinal section steel, and the two ends of the group of transverse section steel are connected with the tops of the two groups of side die supporting section steel respectively. The utility model discloses can be convenient for installation, dismantlement and transportation.

Description

Technical Field

[0001] The utility model relates to a preparation device for a pulling resistance test model of a rock-socketed pile. Background Art

[0002] The test model adopted in the indoor pulling resistance test of a rock-socketed pile includes a rock model and a rock-socketed pile model, and generally the rock model is the key to the test. Most of the preparation of the rock model is carried out by pouring with cement, barite powder, fine aggregate, etc., and there are also those that directly use rock materials as the rock model. The rock model prepared by direct pouring has many advantages such as convenient procurement and production and the ability to customize the size, so it has become an important method for conducting the test of the rock-socketed pile.

[0003] In the past, when pouring the rock model and the rock-socketed pile model, a wooden formwork was often built for pouring, and the rock model and the rock-socketed pile model were poured successively. The advantage of this method is lower cost, but it is not convenient to use and takes a long time.

[0004] There is also a scheme considering pouring with a steel formwork, but less consideration is given to problems such as the handling, demolition, and subsequent testing of the model. When pouring the test model, the convenience during the model test is not considered either. Content of the Utility Model

[0005] The purpose of the utility model is to overcome the defects of the prior art and provide a preparation device for a pulling resistance test model of a rock-socketed pile, which not only has the characteristics of convenient installation and disassembly operations, but also can facilitate the transportation of the test model.

[0006] The purpose of the utility model is realized as follows: A preparation device for a pulling resistance test model of a rock-socketed pile includes a rock preparation mold, a rock-socketed hole mold, a pile body mold, and a lifting frame;

[0007] The rock preparation mold includes a bottom mold and a side mold, wherein,

[0008] The bottom mold includes a steel bottom plate and a group of bottom mold support steel profiles detachably installed on the bottom surface of the steel bottom plate and having a length greater than the width of the steel bottom plate; a channel is provided at the four peripheral edges of the steel bottom plate;

[0009] The side mold is formed by enclosing two transverse side templates and two longitudinal side templates through connecting pieces; each transverse side template includes a transverse steel side plate, a set of side mold support steel profiles detachably installed on the outer surface of the transverse steel side plate and having a height greater than that of the transverse steel side plate, and a friction-reducing plate covering the inner surface of the transverse steel side plate; a set of side mold support steel profiles on the two transverse side templates are correspondingly arranged with a set of bottom mold support steel profiles; each longitudinal side template includes a longitudinal steel side plate and a friction-reducing plate covering the inner surface of the longitudinal steel side plate; a number of bosses adapted to the channels on the bottom mold are spaced downwards on the bottom surface of each transverse steel side plate and the bottom surface of each longitudinal steel side plate, and balls are installed between adjacent bosses.

[0010] The bosses and balls at the bottom of the two transverse side templates and the bosses and balls at the bottom of the two longitudinal side templates are all embedded in the channels corresponding to the bottom mold, and a set of side mold support steel profiles on the outer surfaces of the two transverse side templates are detachably installed on the top surfaces of the two ends of a set of bottom mold support steel profiles in a one-to-one correspondence.

[0011] The rock-socketed hole mold is suspended above the center of the inner cavity of the rock mass preparation mold.

[0012] After the rock mass model is prepared, the pile body mold is coaxially placed on the top of the rock-socketed hole formed by the rock-socketed hole mold.

[0013] The lifting frame is a grid-shaped frame formed by welding a set of transverse steel profiles and a set of longitudinal steel profiles. The spacing between a set of transverse steel profiles of the lifting frame is adapted to the spacing between a set of side mold support steel profiles on the two transverse side templates, so that the two ends of a set of transverse steel profiles of the lifting frame are connected to the tops of a set of side mold support steel profiles on the two transverse side templates in a one-to-one correspondence.

[0014] In the above-mentioned preparation device for the rock-socketed pile uplift test model, a friction-reducing plate is also covered on the top surface of the steel bottom plate.

[0015] In the above-mentioned preparation device for the rock-socketed pile uplift test model, the friction-reducing plate is made of polytetrafluoroethylene plate.

[0016] In the above-mentioned preparation device for the rock-socketed pile uplift test model, the connecting pieces between the transverse side templates and the longitudinal side templates are lock catches or bolts; the transverse steel side plate and the side mold support steel profiles, as well as the lifting frame and the side mold support steel profiles, are all connected by bolts.

[0017] In the above-mentioned preparation device for the rock-socketed pile uplift test model, the rock-socketed hole mold is made of PVC or metal material.

[0018] In the above-mentioned preparation device for the rock-socketed pile uplift test model, a pair of lifting lugs are evenly fixed on the top of the lifting frame.

[0019] The preparation device of the anti-pulling test model of the rock-socketed pile of the present utility model is characterized in that support steel profiles are installed on both the bottom mold and the side mold of the rock preparation mold, ensuring that the overall structure can meet the force requirements during concrete pouring and hoisting, and can be reused multiple times; the installation and disassembly operations of the test model preparation device are convenient, and a hoisting frame is configured to facilitate the transportation of the test model. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a perspective view of the preparation device of the anti-pulling test model of the rock-socketed pile of the utility model;

[0021] Figure 2 is an elevation view of the rock preparation mold in the preparation device of the anti-pulling test model of the rock-socketed pile of the utility model;

[0022] Figure 3 is a plan view of the bottom mold in the rock preparation mold of the preparation device of the anti-pulling test model of the rock-socketed pile of the utility model;

[0023] Figure 4 is a schematic structural view of the side mold in the rock preparation mold of the present utility model;

[0024] Figure 5 is an elevation view of a state when performing step two of the test model preparation using the preparation device of the anti-pulling test model of the rock-socketed pile of the present utility model;

[0025] Figure 6 is another elevation view of a state when performing step two of the test model preparation using the preparation device of the anti-pulling test model of the rock-socketed pile of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] The present utility model will be further described below in conjunction with the drawings.

[0027] Please refer to Figures 1 to 4 , the preparation device of the anti-pulling test model of the rock-socketed pile of the present utility model includes a rock preparation mold 100, a rock-socketed hole mold 200, a pile body mold 300 and a hoisting frame 400; among them,

[0028] The rock preparation mold 100 includes a bottom mold 1 and a side mold, among which,

[0029] The bottom mold 1 includes a steel bottom plate 11, a group of bottom mold support steel profiles 12 installed on the bottom surface of the steel bottom plate 11 by bolts and having a length greater than the width of the steel bottom plate 11, and a friction-reducing plate 10 covering the top surface of the steel bottom plate 11; groove channels 110 are provided at the four peripheral edges of the steel bottom plate 11;

[0030] The side mold is formed by enclosing two transverse side templates 21 and two longitudinal side templates 22 with latches or bolts; each transverse side template 21 includes a transverse steel side plate 211, a set of side mold support steel profiles 212 that are installed on the outer surface of the transverse steel side plate 211 by bolts and have a height greater than that of the transverse steel side plate 211, and an anti-friction plate 10 that covers the inner surface of the transverse steel side plate 210; a set of side mold support steel profiles 212 on the two transverse side templates 210 are correspondingly arranged with a set of bottom mold support steel profiles 12; each longitudinal side template 22 includes a longitudinal steel side plate 221 and an anti-friction plate 10 that covers the inner surface of the longitudinal steel side plate 221; a number of bosses 213 adapted to the channels 110 on the bottom mold 1 are spaced downward on the bottom surfaces of each transverse steel side plate 211 and each longitudinal steel side plate 221, and balls 214 are installed between adjacent bosses 213;

[0031] The anti-friction plate 10 is made of a polytetrafluoroethylene plate;

[0032] The bosses 213 and balls 214 at the bottoms of the two transverse side templates 21 and the bosses 213 and balls 214 at the bottoms of the two longitudinal side templates 22 are all embedded in the corresponding channels 110 of the bottom mold 1, and a set of side mold support steel profiles 212 on the outer surfaces of the two transverse side templates 21 are detachably installed on the top surfaces of the two ends of a set of bottom mold support steel profiles 12 in a one-to-one correspondence;

[0033] The rock-socketed hole mold 200 is suspended in the upper central part of the inner cavity of the rock preparation mold 100; the rock-socketed hole mold 200 is made of PVC or metal material;

[0034] The pile body mold 300 is cylindrical and is coaxially placed on the top of the rock-socketed hole 501 formed by the rock-socketed hole mold 200 after the rock mass model 500 is prepared;

[0035] The hoisting frame 400 is a grid-shaped frame welded by a set of transverse steel profiles 401 and a set of longitudinal steel profiles 402. The spacing between a set of transverse steel profiles 401 of the hoisting frame 400 is adapted to the spacing between a set of side mold support steel profiles 212 on the two transverse side templates 21, so that the two ends of a set of transverse steel profiles 401 of the hoisting frame 400 are respectively connected to the tops of a set of side mold support steel profiles 212 on the two transverse side templates 21 by bolts in a one-to-one correspondence; a pair of lifting lugs (not shown in the figure) are evenly fixed on the top surface of the hoisting frame 400 for hoisting and transportation.

[0036] When preparing the test model by using the preparation device of the rock-socketed pile uplift test model of the present utility model, the following steps are included:

[0037] Step 1: First, use the hoisting frame 400 to hoist the rock preparation mold 100 to the pouring site. Then, remove the hoisting frame 400 and install the rock-embedded hole mold 200. Next, pour the mixed rock materials into the inner cavity of the rock preparation mold 100 to pour the rock mass model 50, and then carry out normal curing. If the rock mass model 50 needs to be moved during the curing period, install the hoisting frame 400 on the rock preparation mold 100 for hoisting;

[0038] Step 2: After the curing of the rock mass model 50 is completed, first remove the rock-embedded hole mold 200 to form a rock-embedded hole 500 at the center of the top surface of the rock mass model 50. Then, coaxially place the pile mold 300 on the top surface of the rock mass model 50 (see Figure 5 ), and then put the steel reinforcement cage of the pile model 60 into the rock-embedded hole 500 and the pile mold 300. Next, pour the pile model 60 in the rock-embedded hole 500 and the pile mold 300. After curing, the pile model 60 is formed, and the pile main reinforcement 600 is exposed on the top surface of the pile model 60 (see Figure 6 ). The pile model 60 and the rock mass model 50 together form a complete test model;

[0039] Step 3: After the curing of the pile model 60 is completed, remove the side molds of the pile mold 300 and the rock preparation mold 100. First, remove the locks or bolts between the transverse side templates 21 and the longitudinal side templates 22, and then use tools such as screws and electric screw rods to push the two transverse side templates 21 and the two longitudinal side templates 22 out along the channels 110 on the bottom mold 1. Since ball bearings 214 are installed on the bottom surfaces of the transverse side templates 21 and the longitudinal side templates 22, and antifriction plates 10 are covered on the inner surfaces of the transverse side templates 21 and the longitudinal side templates 22, the ejection resistance during the removal of the side molds can be reduced. After the side molds are removed, reinstall the two groups of side mold support steel profiles 212 one by one on the top surfaces of the two ends of a group of bottom mold support steel profiles 12, and install the hoisting frame 400 between the tops of the two groups of side mold support steel profiles 212 to form a test model carrier frame, which is convenient for hoisting the entire test model.

[0040] The above embodiments are only for illustrating the present invention, rather than limiting the present invention. Those skilled in the relevant technical fields can also make various changes or modifications without departing from the spirit and scope of the present invention. Therefore, all equivalent technical solutions should also fall within the scope of the present invention and should be defined by each claim.

Claims

1. A preparation device for a rock-embedded pile pull-out test model, comprising a rock preparation mold, a rock-embedded hole mold, a pile mold and a lifting frame; characterized in that: The rock mass preparation mold includes a bottom mold and a side mold, wherein: The bottom mold comprises a steel bottom plate and a set of bottom mold supporting steel sections which are detachably mounted on the bottom surface of the steel bottom plate and have a length greater than the width of the steel bottom plate; grooves are provided around the edges of the steel bottom plate; The side formwork is formed by assembling two transverse side formworks and two longitudinal side formworks and surrounded by connectors; each transverse side formwork comprises a transverse steel side plate, a group of side formwork support steels detachably mounted on the outer surface of the transverse steel side plate and having a height greater than that of the transverse steel side plate, and a friction-reducing plate covering the inner surface of the transverse steel side plate; a group of side formwork support steels on the two transverse side formworks are arranged correspondingly to a group of bottom formwork support steels; each longitudinal side formwork comprises a longitudinal steel side plate and a friction-reducing plate covering the inner surface of the longitudinal steel side plate; a plurality of bosses adapted to the grooves on the bottom formwork are arranged downwardly at intervals on the bottom surface of each transverse steel side plate and the bottom surface of each longitudinal steel side plate, and balls are installed between adjacent bosses; The bosses and balls at the bottom of the two transverse side templates and the bosses and balls at the bottom of the two longitudinal side templates are embedded in the grooves corresponding to the bottom template, and a group of side template support steels on the outer surfaces of the two transverse side templates are detachably mounted on the top surfaces of both ends of a group of bottom template support steels in a one-to-one correspondence; The rock-embedded hole mold is suspended at the upper center of the inner cavity of the rock mass preparation mold; The pile body mold is coaxially placed on the top of the rock-embedded hole formed by the rock-embedded hole mold after the rock-embedded hole model is prepared; The lifting frame is a grid-shaped frame welded from a group of transverse steel sections and a group of longitudinal steel sections. The spacing between the group of transverse steel sections of the lifting frame is adapted to the spacing between a group of side formwork supporting steel sections on the two transverse side formworks, so that the two ends of the group of transverse steel sections of the lifting frame are connected to the top of a group of side formwork supporting steel sections on the two transverse side formworks in a one-to-one correspondence.

2. The preparation device of the rock-embedded pile pull-out test model according to claim 1, characterized in that: The top surface of the steel bottom plate is also covered with a friction reducing plate.

3. The preparation device of the rock-embedded pile pull-out test model according to claim 1 or 2, characterized in that: The anti-friction plate is a polytetrafluoroethylene plate.

4. The preparation device of the rock-embedded pile pull-out test model according to claim 1, characterized in that: The connecting pieces between the transverse side formwork and the longitudinal side formwork are lock buckles or bolts; the transverse steel side plates and the side formwork supporting steel sections as well as the lifting frame and the side formwork supporting steel sections are all connected by bolts.

5. The preparation device of the rock-embedded pile pull-out test model according to claim 1, characterized in that: The rock-embedded hole mould is made of PVC or metal material.

6. The preparation device of the rock-embedded pile pull-out test model according to claim 1, characterized in that: A pair of lifting ears are evenly fixed on the top of the lifting frame.

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