CN201021495Y

CN201021495Y - Vibration machine for plasm injection construction of sand earth foundation

Info

Publication number: CN201021495Y
Application number: CNU2006201596817U
Authority: CN
Inventors: 杜绍安
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-11-16
Filing date: 2006-11-16
Publication date: 2008-02-13
Anticipated expiration: 2016-11-16

Abstract

The utility model provides a mechanical vibration type implement used in grouting foundation consolidation and impervious curtain construction on sandy soil based engineering foundations, civil buildings and slopes. The sandy soil is liquefied by mechanical vibration so that slurry can be grouted in to permeate and consolidate with the sandy soil and shape into a stone body. After probing into the bottom of the grouting hole, the implement simultaneously performs vibrating, grouting and lifting to finish the grouting along the vertical thickness of the sandy soil horizon. The essential structure of the implement comprises a centrifugal block type vibration mechanism driven by a ground frequency-modulated motor, a multi-pore gunniting chamber feeding slurry by a ground grouting pump via pipelines, as well as multi-pore water collecting chamber collecting water contained in the sandy soil and discharging water onto the ground via pipelines.

Description

Sand basis mortar depositing construction vibrating type facility

Technical field

The utility model belongs to engineering machinery field, relates to a kind of mechanical-vibration type facility that use when implementing underpin and building the seepage proof curtain construction with slip casting method in sand bases such as engineering foundation and earthen structure and side slope.

Background technology

The clay foundation of mine construction in the construction work and mining engineering, traffic tunnel engineering, side slope training works, city underground engineering, underground people's air defense and defence construction, base pit engineering, dyke seepage control stabilization works and other underground geotechnical engineering adopts slip casting method to implement consolidation process and antiseepage water blockoff mostly, to guarantee engineering smooth construction and safe operation in the future.The pouring material that uses mainly is cement grout or cement clay slurry; Grouting method adopts methods such as rotary jet grouting or static pressure grouting.Yet, to sand basis (comprise fine sand soil basis and silt basis), because of it has can not perfusion property, very difficultly effectively implement consolidation process and antiseepage water blockoff with slip casting method, this is the construction technology difficult problem of domestic and international extensive concern always, has to be solved.Internet according to domestic and international dozens of site databases such as China National Library, china academia JOURNAL ABSTRACTS, CSCD, Chinese science and technology paper statistics and analytical database, CNKI, website, Europe and Univ California-Berkeley library searches the result, there is no the reported in literature similar to the utility model both at home and abroad.

Summary of the invention

The purpose of this utility model is: the mechanical-vibration type facility that a kind of use when constructing with slip casting method in sand bases such as engineering foundation and earthen structure and side slope (comprise fine sand soil basis and silt basis) is provided, can finish underpin and build seepage proof curtain by the engineering requirement, solve the construction technology difficult problem of sand underpin antiseepage.

The realization the technical solution of the utility model is: cause sand liquefaction mechanism according to principles of soil mechanics and earthquake, take local enforcement mechanical oscillation in the sand basis, make the sand in the subrange lose intensity because of liquefaction, the sand basis can not perfusion property be become placeability, slurries are infiltrated in the sand soil layer, become calculus body with the sand co-cure, reach the purpose of sand underpin and antiseepage with certain intensity and transmission coefficient.For realizing this conception, at first to Diffusion Law and influence factor research experiment thereof in the sand layer of slurries after liquefaction, by test the vibration frequency that can make sand liquefaction and amplitude (or power) and mechanical oscillation facility basic structure form being carried out squama then selects, final determine that the basic structure of mechanical oscillation facility is: facility are cylinder type substantially, so that probe in the injected hole (having bored appropriate during construction before this) in the sand basis.The facility middle part is provided with vibrating mechanism, selects the Weight type vibration for use, and centrifugal by ground Motor Drive.The facility bottom is provided with the whitewashing chamber that can spray slurries in injected hole, and slurries are supplied with the whitewashing chamber by ground grouting pump by pipeline.Facility top is provided with collecting chamber, is used for collecting the moisture content of sand, by the past ground of tubes rows.The slip casting of sand layer is finished in the draining while promoting of facility marginal not slurry.Ground plant equipment except that motor, is still used the plant equipment of using when in the past being used for clay foundation grouting and reinforcing and antiseepage.Because the granularity of the sand of different regions geological conditions is different with water content, liquefy frequency and the amplitude (or power) of required mechanical oscillation with different, the aperture of injected hole is also different in addition, the structural parameters of facility also should be different, need to be determined respectively, make the product line of facility with this by test and calculating.For example, test shows, to common sand basis and the injected hole of the diameter 150mm that uses always, when the facility external diameter is got 145mm, centrifugal quality should be 16～20kg, and the distance of the centrifugal center of gravity and the centre of gyration should be 30～40mm motor, and to select power for use be that 5.5kW, frequency are the frequency modulation motor (Chirp device) of 40～50Hz.Like this, facility can reach 26～30kN to the exciting force of sand, and the diffusion radius of slurries in sand can reach 600～700mm, and the compressive strength of calculus body can reach 3.5～6MPa, and the transmission coefficient of calculus body is less than 3 * 10 ^-7Cm/s.

Description of drawings

Fig. 1 is an axial sectional structure schematic diagram of the present utility model.

The specific embodiment

Referring to accompanying drawing Fig. 1, mechanical-vibration type facility described in the utility model, profile is that the bottom is cone shape cylinder.Its primary structure comprises vibrating mechanism and the whitewashing chamber of bottom setting and the collecting chamber that top is provided with that the middle part is provided with.Centrifugal [3] in the vibrating mechanism that the middle part is provided with are supported in the inner barrel [4] with bearing [14], and are driven by ground frequency modulation motor by rubber coupling [13] and flexible axle [7].The whitewashing chamber that the bottom is provided with is made up of cylinder chamber [2] and the circular cone chamber [1] of whitewashing of whitewashing, and a plurality of circular holes that are used to whitewash are all arranged on the locular wall; Slurries are supplied with by ground grouting pump with sending slurry pipe [12] by sending slurry flexible pipe [10].The collecting chamber [6] that top is provided with is the cylinder that is useful on a plurality of circular holes of collecting water on the locular wall, and indoor water is discharged into ground by gutter [11] and scupper hose [9].Filling can be fixed between inner barrel [4] and outer cylinder body [5] glass fiber reinforced plastic or bituminous material.Facility are connected with ground with the sleeve pipe [8] that is sleeved on outer cylinder body [5] top.Sleeve pipe [8] and send slurry flexible pipe [10] and scupper hose [9] all to adopt elastomeric material flexibly connects facility and ground, and facility probe into tool smoothness when underground, are not subjected to the influence of injected hole axis amount of deflection.Except that nonmetals, other parts all adopt steel.

Operating principle of the present utility model is: when construction is used, facility are insinuated into the bottom of injected hole after, ground frequency modulation motor and grouting pump start simultaneously, facility begin to vibrate.At this moment, grouting pump is by sending slurry flexible pipe [10] and sending slurry pipe [12] that slurries are sent to the whitewashing chamber and spray from cylinder whitewashing chamber [2] and the circular cone chamber [1] of whitewashing, slurries have at first been filled the space between facility outer cylinder bodies [5] and injected hole hole wall and facility sand have on every side been passed in the vibration of facility and made its liquefaction, slurries infiltrate in the sand that is liquefied and with the moisture content in the sand by grouting pressure and self gravitation to be extruded, and makes water enter collecting chamber [6] and is discharged into ground from gutter [11] and scupper hose [9].Slurries in the infiltration sand and sand co-cure gradually become the calculus body.Facility limit vibration marginal not slurry draining limit, limit is promoted with sleeve pipe [8] by ground, and the vertical thickness of sand layer is finished slip casting in by single injected hole.Afterwards, facility are probeed into another injected hole, repeat said process; Count up to into mortar depositing construction until whole injected holes, promptly finished the reinforcing of engineering foundation and the construction of seepage proof curtain by engineering design.

Claims

1. in sand bases such as engineering foundation and earthen structure and side slope, implement underpin and build the mechanical-vibration type facility that use when seepage proof curtain is constructed for one kind with slip casting method, it is characterized in that: its structure comprise the middle part by centrifugal [3], centrifugal [3] are supported on the interior bearing [14] of inner barrel [4], the driving force of ground frequency modulation motor is passed to the flexible axle [7] of centrifugal [3] and the vibrating mechanism of rubber coupling [13] composition, the whitewashing chamber of forming by cylinder whitewashing chamber [2] that a plurality of whitewashing circular holes are all arranged on the locular wall and circular cone whitewashing chamber [1] of bottom, the collecting chamber [6] that a plurality of circular holes are arranged on the locular wall that can collect water on top, between the inner barrel [4] and outer cylinder body [5] of filling with cementing material, and supply with sending slurry rubber hose [10] and sending slurry pipe [12] of slurries to the whitewashing chamber, water in the collecting chamber [6] is discharged into the gutter [11] and draining rubber hose [9] on ground, the gum sleeve [8] that is sleeved on outer cylinder body [5] top that is connected with ground.