5180 results about "Soil horizon" patented technology

The invention discloses a hydraulic pressure milling deep-mixing underground-wall machine in the field of construction machinery, comprising a guide rod; an air conveying pipeline and a slurry conveying pipeline are arranged in the guide rod, two fixing plates are symmetrically arranged at the lower end of the guide rod left and right, at least one group of sealing milling and digging mechanism is arranged on each fixing plate, the sealing milling and digging mechanism comprises a hydraulic pressure motor fixed on the fixing plate, the output shaft end of the hydraulic pressure motor is provided with a sealing cover board, the sealing cover board comprises an axial section sheathed on the output shaft of the hydraulic pressure motor and a radial disc which is radially extended outwards, a rotating body is arranged at the periphery of the radial disc, a plurality of digging mixing teeth are circularly distributed at the periphery of the rotating body; an inner cover shell is sheathed outside the axial section, a bearing is arranged between the outer circumference of the inner cover shell and the inner circumference of the rotating body, the outer ring of the inner cover shell is fixed with the fixing plate, and the inner cover shell, the axial section and the rotating body are connected in a motive sealing way. The machine can cut soil layers and rock, the structure is simple, the sealing is good, can be used for constructing deep underground wall.

The disclosure is directed to a composition for controlling wellbore fluid and gas invasion including methods for using said composition. The composition of the invention is a flowable slurry preferably comprising about 70 to 30% by weight of magnesium oxychloride and about 70 to 30% by weight of water. The composition is a flowable slurry at composition temperatures below about 60° C. and sets to form a substantially solid mass upon reaching a composition temperature of about 60-68° C. The phase transition is rapid, thereby limiting or avoiding formation of gel states which contribute to incomplete wellbore seals. The rapid set of the slurry further avoids invasive contamination of earthen formations surrounding the wellbore. The composition has a near-linear relationship between the time required for the phase transition to occur and the composition temperature at which the phase transition occurs. This advantageous property permits the composition set time to be accurately determined and modified as required through the addition of accelerators and inhibitors. The phase transition occurs predictably at high pressures typical of those encountered in wellbore operations. Additives may be included to modify the properties of the composition. The method includes use of the composition to control the loss of fluids and gases from the wellbore.

The invention discloses a testing device and a method of ground deformation caused by simulating metro shield tunnel construction, and belongs to the technical field of underground engineering experiments. The overall process that similar materials are used for simulating soil layer structures, a tunnel simulating device is used for simulating tunnel structures, and a ground loss simulation system is used for simulating disturbed soil around a tunnel and ground loss is included. After the installation of the device is completed, the ground loss simulation system is started, an airtight water bag which is filled with water by using a pressure water pump in advance is drained step by step through a drain pipe, and water discharge is accurately controlled through a water stop valve and a measuring tank. Moreover, the water discharge is recorded, the ground loss is simulated, a corresponding stratum is deformed, and then the earth surface subsides, the surface subsidence is accurately measured through a dial indicator, and a measured value is recorded. Stratum loss ratio is calculated out through conversion, and the stratum loss ratio and the subsidence measured value are made into forms and images together, and thereby the relation between the stratum loss ratio under different stratum structures and the surface subsidence can be measured out simply, conveniently and accurately.

The invention provides a comprehensive testing system for a shield tunnel structural model, which comprises a soil horizon simulating and soil pressure loading device and a tunnel structural model; the soil horizon simulating and soil pressure loading device is a simulated soil body cavity enclosed by steel plates; a horizontal reaction frame is arranged outside the soil body cavity; a horizontal soil pressure jack is connected between each edge of the reaction frame and the soil body cavity; the tunnel structural model is attached with a uniform water pressure loading device and a non-uniform water pressure loading device, and is axially and vertically arranged in the center of the soil body cavity; simulation testing soil is filled between the tunnel structural model and the soil body cavity; the upper part of the soil body cavity is covered by a steel cover board; a vertical reaction portal frame is arranged above the soil body cavity; and a vertical soil pressure jack is connected between the lower part of a girder of the vertical reaction portal frame and the steel cover board. The system can simulate interactions between tunnel structures in different forms of fractures with the stratum under different stratigraphic and hydrologic conditions, and more truly simulate the environment conditions of the tunnel structures with more accurate and reliable test data, thereby providing more reliable safeguard for shield tunnel constructions.

The invention discloses a high and steep rocky slope vegetation planting method. The high and steep rocky slope vegetation planting method comprises the following steps of 1 digging a plurality of planting holes in the surface of a high and steep rocky slope; 2 drilling a plurality of root system holes in the bottoms of the planting holes; 3 pouring water into the planting holes and the root system holes after the root system holes drilled, mixing and stirring clay and water to form slurry after accumulated water disappears, filling the slurry into the root system holes and coating slurry on the inner walls of the planting holes; 4 sequentially filling water storage layers, a nutrient soil layers, seed layers and evaporation preventing layers in the planting holes from bottoms to tops. By means of the high and steep rocky slope vegetation planting method, the vegetation moisture problem is solved, vegetation survival rate is improved, and maintenance cost is reduced.

A basement engineering waterproof and drainage method is provided. The wall footing of the outside wall in basement engineering is embedded in watertight or micro-watertight soil rock layer or cement soil layer. The wall footing intercepts water by a thin-part structure. The cushion of the basement engineering soleplate and the falling layer of the top board are composed of combined water-proof layers. The late poured band, the movement joint and the horizontal construction joint at the lower part of the outside wall are treated by a water-proof structure combined with waterproofing measures. The basement engineering is provided with a drainage system. The groundwater and surface water at the soleplate are drained into city drainage pipelines via a soleplate part of the drainage system. The rainwater of overburden layer bottom of the top board is then drained into city drainage pipelines via the indoor part of the drainage system. The invention is designed by adopting a one-body method of arranging the basement engineering waterproofing, drainage and anti-floating as well as underground engineering space enclosing structure and pipelines, thereby shortening the construction period, reducing the engineering cost, increasing the durability and reliability of underground building space enclosing structure and waterproof layer as well as pipelines.

A system for generating digital models of nitrogen availability based on field data, weather forecast data, and models of water flow, temperature, and crop uptake of nitrogen and water is provided. In an embodiment, field data and forecast data are received by an agricultural intelligence computing system. Based on the received data, the agricultural intelligence computing system models changes in temperature of different soil layers, moisture content of different soil layers, and loss of nitrogen and water to the soil through crop uptake, leaching, denitrification, volatilization, and evapotranspiration. The agricultural intelligence computing system creates a digital model of nitrogen availability based on the temperature, moisture content, and loss models. The agricultural intelligence computing system may then send nitrogen availability data to a field manager computing device and / or use the nitrogen availability data to create notifications, recommendations, agronomic models, and / or control parameters for an application controller.

A system for generating digital models of nitrogen availability based on field data, weather forecast data, and models of water flow, temperature, and crop uptake of nitrogen and water is provided. In an embodiment, field data and forecast data are received by an agricultural intelligence computing system. Based on the received data, the agricultural intelligence computing system models changes in temperature of different soil layers, moisture content of different soil layers, and loss of nitrogen and water to the soil through crop uptake, leaching, denitrification, volatilization, and evapotranspiration. The agricultural intelligence computing system creates a digital model of nitrogen availability based on the temperature, moisture content, and loss models. The agricultural intelligence computing system may then send nitrogen availability data to a field manager computing device and / or use the nitrogen availability data to create notifications, recommendations, agronomic models, and / or control parameters for an application controller.

The invention discloses a model for causing ground setting due to an engineering environment effect and a test method thereof. The model comprises a model casing, simulation materials, measuring equipment, data acquisition equipment and water pressure controlling equipment, wherein the simulation materials for simulating a research area are placed in the model casing; the measuring equipment is arranged in the model casing for measuring parameters; the data acquisition equipment is connected with the measuring equipment and is used for acquiring and processing the parameters measured by the measuring equipment; and the water pressure controlling equipment is connected with the model casing and provides water pressure for the model casing and is used for simulating a water table aquifer and an artesian aquifer on a practical soil layer. the test method comprises the following steps of: determining influence factors to be researched; considering the size and the distance of a simulationbuilding and the plane size of the model casing according to the consolidation principle; determining various similar constants by adopting a dimensional method; determining the simulation materials;simulating the early-stage preparations of the test; and carrying out a simulation test. According to the invention, the ground deformation due to the underground water level lifting and the ground setting due to the engineering environment effect can be researched.

The invention discloses a grouting simulating test device and a test method thereof, and belongs to the field of indoor grouting simulating test. The grouting simulating test device comprises a pressurizing system and a grouting permeating device, wherein the pressurizing system comprises a pressurizing air pump, a mortar storage bucket and a pressure gauge, a stirrer is arranged in the mortar storage bucket, and the upper part and lower part of the mortar storage bucket are respectively provided with a mortar inlet and a mortar outlet which are communicated with the pressurizing air pump and the grouting permeating device; the grouting permeating device comprises an inner cylinder and an outer cylinder, and water permeating holes are distributed in the wall of the inner cylinder; a grouting pipe is arranged at the top part of the grouting permeating device and extends into the grouting permeating device, the exterior of the grouting pipe is provided with external threads, and a porous separating plate is sheathed at the exterior of the grouting pipe, and can move vertically; holes are formed in the bottom part of the grouting permeating device, and the upper part of the grouting permeating device is provided with water permeating stones. The grouting simulating test device has the advantages that the grouting simulating test device can be used for grouting simulating test of multiple soil layer overlying conditions, different filling and building conditions and water-containing soil conditions; the operation of the test method is simple, multiple working conditions can be simulated, the grouting simulating effect is approximate to the actual condition, and the grouting effect is visual and visible.

The invention discloses an urban road rainfall runoff ecological coprocessing device and a method. The device comprises an urban road rainfall runoff ecological coprocessing box and a bioretention purification unit, wherein an overflow weir board, a second screen mesh partition and a perforation partition are arranged in the urban road rainfall runoff ecological coprocessing box at intervals sequentially; the interior of a box body is divided into an overflow chamber, a water inlet chamber, a water distribution chamber and a bioretention purification chamber that are sequentially arranged by the overflow weir board, the second screen mesh partition and the perforation partition; and the bioretention purification unit is arranged in the bioretention purification chamber, and comprises a gravel layer, a sand filter layer, a planting soil layer and plants. The device and the method can sequentially remove floating matters, particles and soluble pollutants that are in different particle sizes in rainfall runoff, achieve hierarchical control of the pollutants in the rainfall runoff, can store a part of rainfall runoff to meet growth requirements of the plants in the bioretention unit, achieve a water conservation effect, and can also achieve multi-purpose control of water quality and water quantity of the urban road rainfall runoff.

A method for determining a property of formations surrounding an earth borehole being drilled with a drill bit at the end of a drill string, using drilling fluid that flows downward through the drill string, exits through the drill bit, and returns toward the earth's surface in the annulus between the drill string and the periphery of the borehole, including the following steps: obtaining, downhole near the drill bit, a pre-bit sample of the mud in the drill string as it approaches the drill bit; obtaining, downhole near the drill bit, a post-bit sample of the mud in the annulus, entrained with drilled earth formation, after its egression from the drill bit; implementing pre-bit measurements on the pre-bit sample; implementing post-bit measurements on the post-bit sample; and determining a property of the formations from the post-bit measurements and the pre-bit measurements.

The invention relates to an active powder soil solidifying agent as well as a preparation method and application thereof. The active powder soil solidifying agent comprises the following components in percentage by weight: 4%-8% of binding materials, 76%-89% of aluminosilicate materials, 4%-12% of active materials and 3%-7% of exciting agents. The active powder soil solidifying agent disclosed by the invention is reasonable in component proportion, obtains the raw materials locally, is convenient, advisable, simple in production process, low in energy consumption, low in cost, wide in trial range on different soil, high in solidifying strength and stable in solidified soil layer property; the prepared soil solidifying agent is applied to a site construction process, simple and easy to operate; compared with the traditional construction process, the prepared soil solidifying agent is less in usage amount, creates better social benefit, economic benefit and environment benefit and plays a certain environmental protection role by utilizing waste residue coal ash, gangue, iron ore slag and the like.

The present invention relates to a method for planting grape in arid desert area. Said method includes the following several steps: according to the spacing distance of 4-6m excavating overwintering soil-covering cold-resisting channel, excavating planting channel in the centre of cold-resisting channel bottom, laying PVC plastic film on the channel bottom of planting channel and two side walls, filling coarse sand or chad into the channel bottom, then making the planting channel be filled up with soil and fertilizer mixture, according to the spacing distance of 1m planting grape young tree, at two sides of tree body respectively setting one drip irrigation band, at two sides of root system alternatively making irrigation, adopting small trellis form and pruning, when autumn changes into winter in every year, removing aerial portions of grape main vine and fruiting twigs from grape trellis and placing them into cold-resisting channel and covering said cold-resisting channel with a layer of sandy soil whose thickness is 50cm for overwintering.

The invention discloses a method for planting organic passion fruit trees. The method includes the steps of variety selection, site selection, soil preparation, soil pH adjustment, establishment of a passion fruit tree foundation, field planting, reshaping and pruning, field management, blossoming, fruit yielding and the like. According to the method, organic fertilizer and a low-toxicity prevention method are adopted in fertilization and pest control, so that the pulp of produced passion fruits is full of yellow fruit juice, the content of sugar is high, the color is bright, the yield reaches up to 2 tons per mu each year, pollution is avoided, and five seasons of fruits can be harvested each year. The successful planting of the organic passion fruit trees provides a theoretical and practical basis for creating incomes of local farmers. According to the method, a leeward apricus flat ground is selected, and the place where a good source of water is obtained, the soil layer is thick, fertility of the soil is above the average and transportation is convenient is used as a planting foundation, so that it is guaranteed that the passion fruit trees can grow in a good environment, the roots of nursery-grown plants are planted in furrows and exposed to the sun, hence, the roots can better absorb sunshine, and fertilization and weeding are further facilitated.

A temporary soil sheathing apparatus supports a set of intermediate bracing beams in a triangular supporting structure during pit excavation work for constructing an underground structure, so that it can satisfactorily support soil pressure. Thus, it is possible to prevent space from being reduced by a complicated supporting structure, reduce construction costs through reduced use of materials, and increase work space to improve productivity. The temporary soil sheathing apparatus simplifies a corner connecting structure, and reinforces ability to withstand the soil pressure transmitted from the bracing beams and wales. Thereby, it is possible to prevent space from being reduced by a complicated supporting structure, reduce construction costs through reduced use of materials, and increase work space to thus improve productivity.

The invention discloses a desert control method of a chemical sand-fixing greening technology based on organic composite materials, and the desert control method is characterized in that hydrophilic polyurethane resin curing agent solution is sprayed on a sand or soil layer of greening objects for sowing the vegetation for forming a porous fixed sand layer. The fixed sand layer formed by the method has appropriate thickness and strength, good durability, good anti-freeze and melt properties and functions of water retention, thermal insulation, ventilation, vegetation and the like. According to the method of the invention, the stable and effective solidifying can be carried out on sand even under the specific desert environments of no abundant groundwater sources and strong wind erosion, and the purpose of vegetation greening can be also realized. The method has large-scale construction properties and good economic performances, thereby being applicable to the needs of large-scale chemical sand fixing and vegetation greening of the vast desert and realizing the plant greening function and the ecological restoration and the control of desertified land.

The invention discloses an ecological integrated improved facility and improving method for saline and alkaline land. The ecological integrated improved facility and improving method are characterized in that: according to the ecological integrated improved facility for the saline and alkaline land, a salt removing filter layer is filled in a blind ditch; a layer of non-woven fabric is paved on the surface of the salt removing filter layer; mixed soil a of original soil and organic matters is filled above the non-woven fabric of the blind ditch; the blind ditch is filled and leveled up with the mixed soil; small square plots are arranged above the mixed soil a; acid salt removing columns are equidistantly arranged on each work plot; plants are respectively planted on each work plot; and thick peat soil is paved on the surface of the soil around the plants. The ecological integrated improving method for the saline and alkaline land comprises the following steps of: blocking; arranging the blind ditch; filling the blind ditch; filling and leveling up the peat soil; applying the organic matters; washing and removing salt; applying a modifying agent and acid fertilizer to the saline and alkaline land; arranging the salt removing columns; deeply ploughing and cultivating; and paving the thick peat soil. The ecological integrated improved facility and improving method disclosed by the invention have the advantages that a soil crumb structure is helped to form; the water permeability performance among soil layers is improved; and the development of crop root systems is effectively promoted.

A polycrystalline diamond cutting element for earth boring drill bits presents regions of different abrasion resistance to the earthen formation when in operation. The cutting element has an end working surface and a region which is substantially free of catalyzing material, forming a layer. In operation, this layer wears at a different rate than the underlying material causing a pair of protruding lips to form. The end working surface may be substantially planar or frusto-conical in form.

The invention discloses a method and a device for preparing a silty soil triaxial-test test sample. The method comprises the following steps: adding distilled water into silty soil and stirring to enable soil samples to be in a flow plastic state, namely slurry; precipitating the slurry in a split round die under the action of self weight; applying dead loads to the upper part of the test sample, removing the dead loads at the upper part of the test sample and enabling the test sample to be further solidified by adopting a vacuum negative pressure of minus 40 kPa, wherein in the process of applying the dead loads, to guarantee that the slurry does not overflow, the loads are slowly and gradually loaded and a next-stage load is applied after the soil samples complete solidification and drainage under a current load; and finally, removing the negative pressure and the split round die and completing preparation of the test sample, so that triaxial test equipment can be assembled to carry out static triaxial or dynamic triaxial test. The method and the device are simple to operate; the technical method is easy to master; equipment required for preparing the test sample is very simple; required test sample preparation cost is low; uniformity inside the soil samples is very good; reproduction degree between the soil samples is high; a microstructure of a soil layer in the nature can be reproduced to a higher degree; the soil samples do not need to be cut; disturbance is reduced; and the test result has high credibility.

The invention discloses an irrigation control method and system based on crop root zone soil moisture and root distribution. The method comprises the steps that parameters are set, soil water content in each soil layer of a root zone is monitored, root zone weighted average soil water content is computed according to relative root length density distribution, a crop water stress index (CWSI) is computed, when the CWSI computed value is larger than a preset CWSI critical value, irrigation is started; theoretical irrigation amount can also be computed according to planned moisture layer soil water content, and when practical irrigation amount reaches the theoretical irrigation amount, irrigation is stopped. According to the irrigation control method and system, the water stress degree of crops can be accurately and conveniently estimated, the fact that the root zone soil moisture distribution conditions and the crop moisture conditions are considered during irrigation is controlled according to the water stress degree, and an effective tool is provided for realizing of the purposes of water saving and production increasing.

The invention relates to a construction process for the pile foundation in the civil engineering, in particular to a construction process of a bored pouring pile. During the process, a steel casing is sunk on the upper surface of the dense soil layer at the soft soil layer section; the wall of the pile is protected by the steel casing; subsequently, a rotary excavation drilling machine with a friction-typed drilling rod is used for forming hole; at the dense soil layer section, the rotary excavation drilling machine with a lock-typed drilling rod is used for forming hole. Therefore, the boring deviation and diameter enlarging of the pile can be effectively avoided; the pile quality and the operation efficiency are improved; if the dense soil layer section contains the substance with plenty of underground water, the slurry is used for protecting the wall of the pile during the hole-forming process; after the hole is completed, the hole is arranged statically for certain a time; the sunk slag at the bottom of the pile is removed by a cylindrical drilling bucket; and if the dense soil layer contains the substance which has no underground water basically or has little underground, the dry hole-forming method is used. The construction process can avoid collapsing of the hole, reduces the displacement of the slurry and reduces the pollution to the environment.

The invention relates to a curing agent for reinforcing and treating a soft soil foundation and application thereof. The curing agent for soft soil contains 10-25% of cement clinker, 65-80% of slag, 4-10% of filling material, 1-10% of expanding agent, 0.2-5% of alkaline excitation agent and 0.02-0.3% of surfactant, wherein the filling material is fine sand or / and coal ash; the expanding agent is gypsum or desulfurization gypsum; the expanding agent is calcined lime or sodium hydroxide; and the surfactant is triethanolamine or calcium lignosulphonate. The curing agent for soft soil can be applied to reinforcing soft soil like cumulosol, high-salinity stratum or the like, and the using amount of the curing agent for soft soil is preferably 8-20% of the weight of a reinforced soil body. The curing agent for soft soil, provided by the invention, only contains a little cement clinker and can enable soil layers with poor cement reinforcing effects, such as cumulosol, high-salinity stratum or the like, to obtain better physical and mechanical performances after the curing agent for soft soil is applied.

The invention belongs to the field of tunneling in geotechnical engineering and underground engineering, and particularly relates to a centrifugal experimental simulation testing device for surface subsidence induced by city shield tunnel construction. The testing device mainly comprises a model box, a small displacement meter bracket, a big displacement meter bracket, a tunnel excavation device, a linear variable differential transformer (LVDT) displacement meter and the like, wherein the model box is a hollow cuboid; the small displacement meter bracket and the big displacement meter bracket adjust the LVDT displacement meter along the horizontal direction and the vertical direction, so that the surface subsidence and the soil layer deformation can be measured; and the tunnel excavation device can simulate the soil body deformation caused by stratum loss by discharging a certain volume of water. Through the device, the deformation influence of the city shield tunnel construction on surrounding soil layer can be more conveniently, really and effectively simulated, so more real and accurate experimental data can be provided for tunnel design and construction, and high efficiency and safety of the city shield tunnel construction are guaranteed.

A horizontal freezing method for constructing the tunnel in soft stratum includes such steps as determining the saline temp in active freezing period and maintaining freezing period, the average temp of frozen earth wall and the strength of frozen earth, designing and arranging the freezing hole, calculating the cold needed by freezing, excavating the horn-shaped portal tunnel segments at both ends, excavating middle segments, and enlarging the tunnel.

The invention discloses an indoor simulation experiment system for pipe-jacking grouting drag reduction, which comprises an experiment box. An opening and a vertical loading test system are arranged on the experiment box; obround holes are arranged on two opposite sides of the experiment box; a horizontal loading test system is arranged on the one side of the experiment box; the experiment box is internally filled with a soil sample; a pipe to be tested penetrates through the experiment box via the obround holes on the two sides of the experiment box. The experiment system also comprises a grouting system and a grouting pipe connected with the grounding system; the pipe to be tested is formed by a front pipe segment and a rear pipe segment that are connected with each other; and the diameter of the front pipe segment is larger than that of the rear pipe segment; at least one grouting hole is configured on the wall of the pipe to be tested; and a slurry outlet end of the grouting pipe extends in the pipe to be tested and is connected with the grouting holes. According to the invention, the experiment test can simulate pipe-jacking process in soil layers; mixed slurry is injected to surrounding soil during the jacking process to test frictional resistance and frictional coefficient during the pipe-jacking process under different slurry proportions and different grouting pressures, so that the grouting pressure and the grouting proportion suitable for pipe-jacking in the soil layers can be obtained comprehensively and accurately.

The present invention relates to a rainwater-collecting permeable concrete pavement system. It is characterized by that said pavement structure includes rammed earth layer whose thickness is greater than 10mm, general concrete base layer whose thickness is 80-100 mm, permeable concrete structure layer whose thickness is 100-150 mm and permeable concrete face layer whose thickness is 40-60mm from bottom to top. Said pavement system is adjacent to green belt, under the green belt a rainwater-collecting pool is set, and the bottom portion of said rainwater-collecting pool is equipped with a submersible pump. Along the length direction of said pavement structure two sides of said pavement system are respectively equipped with a rainwater-collecting channel, the outlet of said submersible pump is connected with pipe network, and said pipe network is distributed in the green belt.

The invention discloses a method for processing a soft roadbed through artificial composite crusts, including the following steps: first, constructing micro-piles; second, constructing a construction waste cushion layer; third, constructing pile caps and paving steel-plastic geotechnical grilles; fourth, filling and building a soillime layer; fifth, filling and building a compact clay-doped construction waste layer; and sixth, filling and building a road embankment. The micro-piles is connected with a plastic or hard plastic claypan and a soft plastic claypan; pile caps are arranged on the piles and the steel-plastic geotechnical grilles are connected on the pile caps; the undersides of the steel-plastic geotechnical grilles are connected with the construction waste cushion layer, and the upsides are connected with the soillime layer; and the soillime layer is connected with the compact clay-doped construction waste layer which is finally connected with the road embankment. The method reduces construction cost and environment pollution, realizes utilization of a large amount of construction waste, and remarkably improves the bearing strength and uneven settlement resistance of soft roadbeds. The method is also applicable for soft roadbed treatment in large area in other municipal projects.

The invention relates to a construction method of a connecting channel by a double-row hole horizontal freezing method. The method comprises the following steps: freezing parameters are defined; frozen holes are arranged and drilled; a freezing system is mounted and operated; the connecting channel is constructed and excavated; injected slurry is unfrozen and thawed initiatively, artificially and compulsively combining construction monitoring and natural unfreezing; in the method, at the time of natural unfreezing, hot brine circulates in the frozen holes, frozen soil is unfrozen compulsively in means of area separation, and the unfreezing is carried out from down to up; thaw settlement grouting is carried out by a pre-buried injection pipe, and the grouting is carried out from down to up; the frozen holes are arranged in a row of outer holes and a row of inner holes; the length of the holes is subject to the length reaching a side duct piece, the way of holing on the two sides is applied; the connecting channel is excavated in the way of dynamic excavation, namely the heading and constructing of two main tunnels are operated simultaneously. The method efficiently controls the stability of the mouth of a cave in the process of excavation and the sedimentation of the connecting channel and the two main tunnels, and has the advantage of saving the construction period, therefore, the method is applicable for the freezing construction of the connecting channel of various soft soil layers.

The invention discloses a hydraulic monitor rod of seabed soil multifunctional multipath pore in the sea detection technique domain, which is characterized by the following: the bottom of hydraulic monitor rod contains static CPT probe 5 and the top contains data sealing bin 1; several sectional interphase arrangements of detecting rod end connector 2 and hollow connection sleeve are connected between the data sealing bin 1 and static CPT probe 5. The invention can be used in the hard sand marine site of named 'steel sand', which is allocated safely at even slow speed to monitor different depths of wave and tide condition.