CN204461818U - A kind of slurries sampler detected for TRD equal thickness Soil-cement Wall - Google Patents

Abstract

The utility model belongs to the slurries sampler that a kind of TRD equal thickness Soil-cement Wall in base pit engineering field detects, and it comprises gets slurry cylinder, piston, pull bar, unidirectional locking arrangement, outer tube, spherical retaining valve; Get tapered at the bottom of slurry cylinder cylinder top hollow out, cylinder and arrange spherical retaining valve, cylinder top, top is connected and fixed by connecting rod and outer tube, and piston is positioned at gets slurry cylinder, and employing rubber seal in piston outer ring starches that cylinder is closely knit to be contacted with getting, and has good impermeability.The pull bar be connected with piston is placed in outer tube, lifts piston by pull bar.Outer tube is provided with unidirectional locking arrangement, can carry out unidirectional locking in pull bar lift process to it.The utility model design of node is simple and reliable, can reduce engineering detecting cost, easy construction, practical.

Description

A slurry sampling device for the detection of TRD equal-thickness cement-soil mixing wall

technical field

The utility model belongs to a slurry detection and sampling device in the field of foundation pit engineering, which can be widely used in projects adopting TRD equal-thickness cement-soil mixing walls, and can also be used for sampling liquid substances such as underground continuous walls, cast-in-situ pile retaining mud, etc. .

Background technique

TRD equal-thickness cement-soil mixing wall can be inserted with section steel to form an equal-thickness steel-cement-soil mixing wall foundation pit enclosure structure, and can also be used for water-proof curtains of foundation pit engineering and groove wall reinforcement of underground diaphragm walls. This construction method is suitable for a wide range of strata, good wall homogeneity, reliable water-proof performance, and a construction depth of up to 60m. It is an energy-saving and environmentally friendly green construction method with high promotion value.

The current detection method used for cement-soil mixing walls of equal thickness is mainly drilling and coring detection. Drilling and coring testing is to continuously drill and core the entire wall through geological drilling rigs after the construction of the cement-soil mixing wall reaches a certain age, and conduct unconfined compressive strength tests on the sampling point core samples. During the process of drilling and coring, the disturbance of the cement soil core sample is large, and the strength of the sample is greatly lost. The test results often have a large deviation from the actual situation, and it is difficult to reflect the real strength of the cement soil core sample, and the test cost is high. In addition, the drilling and coring inspection is a destructive inspection, and excessive intensive inspection will have a certain impact on the water insulation effect of the cement-soil mixing wall of equal thickness, so generally only a small amount of random inspection can be carried out. However, extracting grout and making test blocks for the newly completed wall is non-destructive testing, which is simple and low-cost. A large number of sampling tests can be carried out according to the shift, which is conducive to comprehensively grasping the quality of the wall. However, there is no device that can extract the deep slurry of the cement-soil mixing wall in the current project, which cannot meet the needs of deep slurry sampling. Therefore, it is urgent to develop a reliable slurry sampling device to meet the requirements of deep slurry sampling and detection of the cement-soil mixing wall of equal thickness. need.

Utility model content

The technical problem to be solved by the utility model is to provide a slurry sampling device for testing the cement-soil mixing wall with equal thickness of TRD. The device can extract the deep slurry of the cement-soil mixing wall with equal thickness of TRD and is easy to use.

In order to solve the above-mentioned technical problems, the basic concept of the utility model is: the top of the pulp extraction cylinder is hollowed out, the bottom of the cylinder is conical, and a pulp inlet is provided. The rod is connected and fixed with the outer casing, the piston is located in the pulp extraction cylinder, the outer ring of the piston is in airtight contact with the pulp extraction cylinder, the pull rod connected with the piston is placed in the outer casing, the piston can be pulled by the pull rod, and the outer casing is equipped with There is a one-way locking device, which can be used for one-way locking during the pulling process of the pull rod. The outer sleeve and pull rod can be adjusted in length according to the sampling depth.

The working principle of the utility model is as follows: after the slurry extraction cylinder is sunk to a predetermined depth in the slurry, the piston in the slurry extraction cylinder can be pulled to form a vacuum in the cylinder below the piston, and the slurry is under vacuum negative pressure and surrounding mud pressure. Under the action of the action of the slurry inlet at the bottom of the cylinder, the pulp extraction cylinder is filled. After the slurry is full, the spherical check valve automatically closes the slurry inlet under the action of gravity, so as to achieve the purpose of extracting the slurry.

The device is easy to use and has strong practicability. It can extract the deep slurry of the cement-soil mixing wall with the thickness of TRD for test block detection. It can not only reflect the real strength of the cement-soil core sample, but also reduce the detection cost, and avoid conventional coring detection. Adverse effects on the wall.

Description of drawings

Below in conjunction with accompanying drawing and using method, the utility model is further described.

Figure 1 is a detailed structural diagram of the slurry sampling device for testing the cement-soil mixing wall with equal thickness.

Fig. 2 is a schematic diagram of the first construction process of the method of using the slurry sampling device for testing the cement-soil mixing wall of equal thickness.

Fig. 3 is a schematic diagram of the second construction procedure of the method of using the slurry sampling device for testing the cement-soil mixing wall of equal thickness.

Fig. 4 is a schematic diagram of the third construction process of the method of using the slurry sampling device for testing the cement-soil mixing wall with equal thickness.

Detailed ways

The utility model provides a slurry sampling device for detecting cement-soil mixing walls with equal thickness of TRD. After sinking the slurry extraction cylinder to the predetermined depth in the slurry, the piston in the slurry extraction cylinder is pulled to form a vacuum in the cylinder under the piston, and the slurry passes through the slurry inlet at the bottom of the cylinder under the action of the vacuum negative pressure and the surrounding mud pressure When the slurry extraction cylinder is full, the spherical check valve automatically closes the slurry inlet under the action of gravity after the slurry is full, so as to achieve the purpose of extracting the slurry. In conjunction with the accompanying drawings, the specific description is as follows.

As shown in Figure 1, it includes a pulp extraction cylinder 1, a piston 2, a pull rod 3, a connecting rod 8, a one-way locking device 4, an outer sleeve 5, and a spherical one-way valve 6; It is conical and equipped with a spherical one-way valve 6. The top of the upper cylinder is connected and fixed with the outer sleeve 5 through the connecting rod 8. The piston 2 is located in the pulp extraction cylinder 1. The outer ring of the piston 2 is in close contact with the pulp extraction cylinder 1 with a rubber sealing ring. And has good air tightness. The pull rod 3 connected with the piston 2 is placed in the outer sleeve 5, and the piston 2 can be pulled through the pull rod 3. The outer sleeve 5 is provided with a one-way locking device 4, which can lock the pull rod 3 during the pulling process. Connecting rod 8 one or more, quantity is not limited, and shape is not limited, only need get pulp tube and outer casing to be connected and fixed.

Figures 2 to 4 show the usage method of the slurry sampling device for the cement-soil mixing wall of equal thickness in TRD, as shown in Figure 2: the piston 2 is placed in the slurry cylinder 1, and the sampling device is sunk to the cement of equal thickness through the outer sleeve 5 The soil mixing wall slurry is sampled at a predetermined depth; as shown in Figure 3: the piston 2 is pulled by the pull rod 3 to form a vacuum in the cylinder below the piston 2, and the slurry 7 is filled through the slurry inlet under the action of the vacuum negative pressure and the surrounding mud pressure. The slurry cylinder, the one-way locking device 4 locks it one-way during the pulling process of the pull rod 3, and the spherical one-way valve 6 automatically closes the pulp inlet under the action of gravity after the slurry 7 is filled with the pulp extraction cylinder. As shown in FIG. 4 : after the pulp extraction cylinder 1 is filled with the slurry 7 , the sampling device is lifted out of the liquid surface through the outer sleeve 5 . The slurry in the slurry extraction cylinder 1 is made into a test block according to the requirements of the relevant specifications, and the inspection of the cement-soil mixing wall with equal thickness is completed.

The above is a detailed introduction to the solution provided by the utility model. For those of ordinary skill in the art, based on the idea of the embodiment of the utility model, there will be changes in the specific implementation and application range. To sum up, the contents of this specification should not be understood as limiting the utility model, and any changes made according to the design concept of the utility model are within the protection scope of the utility model.

Claims (1)

1. the slurries sampler detected for TRD equal thickness Soil-cement Wall, it is characterized in that: get slurry cylinder (1) cylinder top hollow out, the cylinder end, is tapered and arrange stock inlet, described stock inlet portion arranges spherical retaining valve (6), described cylinder top, top of getting slurry cylinder (1) is connected and fixed by connecting rod (8) and outer tube (5), slurry cylinder (1) is got described in piston (2) is positioned at, described piston (2) outer ring adopts rubber seal and described getting to starch cylinder (1) close contact, the pull bar (3) be connected with described piston (2) is placed in described outer tube (5), by described pull bar (3), described piston (2) is lifted, unidirectional locking arrangement (4) is provided with in described outer tube (5), unidirectional locking can be carried out to it in described pull bar (3) lift process.