CN207331698U - A kind of mud deep basal pit pipe alley structure - Google Patents

Abstract

The utility model discloses a kind of mud deep basal pit pipe alley structure, the mud of pipe alley both sides is consolidated to form solidified earth plate body using curing agent, as pipe alley construction operation platform, pipe laying is carried out in the pipe alley section for the anti-groove that digs out of entity square, and the upper limb of pipe alley consolidation body section is mutually connected with solidified earth plate body；At the pipe laying of the pipe alley bottom, equipped with metalling and concrete component layer.The utility model can solve in soft base deep basal pit pipe alley when constructing, and practical using a kind of simple economy, construction is convenient, environmentally protective, curing agent consolidation and section for entity square the anti-technical problem dug out groove and carry out pipe laying.

Description

A kind of mud deep basal pit pipe alley structure

Technical field

It the utility model is related to building structure in soft soil foundation.

Background technology

On deep layer silt soft soil foundation, the main common technology of deep foundation pit of construction pipe trench includes steel sheet pile supporting excavation skill Art, the crowded silt strong tamping technology of mountain skin soil and cement mixed pile technology.

1st, mud moisture content is high, and compression ratio is big, and compression modulus is very low, when big-diameter pipeline ditch is excavated without steel sheet pile supporting Landslide and mud levelling are easily caused, difficulty of construction is very big.

Using inner excavation depth after Larsen steel sheet pile supporting up to more than ten meters, it ensure that steel sheet pile groove interior conduit ditch is constructed It can be smoothed out.Supporting steel sheet pile need to build piling machine or excavator constructing operation passage first on large area silt soft foundation, To the antirust of steel plate, slideway lubrication, vertically lower stake required precision is higher, the old easy leak deformation of stake, and when pile pulling will prevent vibrations pair Main pipeline ditch structural damage, therefore must be operated by professional construction troop.Steel sheet pile technology is only one kind of no sloping timbering Method, also needs inside it mud to change to fill out mountain skin soil and squeeze the technology such as become silted up and be used cooperatively.

2nd, dynamic compaction reinforced soft soil foundation technology is to be introduced from foreign countries China's the 1970s, it passes through 8~30 tons Weight and 8~20 meters fall away from applying very big impact energy to foundation soil, play the compacted effect of draining.To silt soft Cannot be directly using heavy-tamping method, it is necessary to be used in combination with the crowded silt of mountain skin soil for base, mud skin soil Depth of filled soil of going up a hill takes Certainly in its lower silt depth, moisture content height, compression modulus height is surveyed lowly reports provided earth working material parameter, in sea Mountain skin soil embankment on phase silting and blowing-filling sludge layer under strong rammer effect, makes backfill mountain skin soil up to 3~6 meters of thickness It is stabilized.But around under the immersion of the long-time of mud and water, its bearing capacity is in reduction trend, is dripped thereon after often resulting in several years The cracking on blue or green road surface and the differential settlement of roadbed.

3rd, cement mixed pile technology is just to be introduced from abroad in the sixties in last century, is applied in soft soil foundation construction It is quite varied, by the physical-chemical reaction occurred between cement and soil, the bearing capacity and stability of soft soil foundation are enhanced, It is usually used in cofferdam construction, dykes and dams and massif are reinforced, plate body ground-based supports, weak soil foundation pit waterproof curtain and Gravity Retaining Wall.Water Mud mixing pile is often 0.6 meter with pile body diameter, and pile will fill 150~300 kilograms of cement per linear meter(lin.m.) in mud, and cement is becoming silted up Reinforcing positive effect in mud reduces.Higher or in the case of fine clay particle is more for moisture content in weak soil, cement stirs Mix and often occur pile breaking phenomenon in pile driving construction.If in mud deep basal pit drainage construction engineering by cement mixing pile, steel sheet pile and Mountain skin soil forced ramming construction method substantially carry out construction cost compare it finds that, this ratio the result is that 3：1.5：1, cement Mixing pile is a kind of construction method costly.Therefore above-mentioned traditional technology has different technical problems.

A kind of method that soft base deep basal pit pipe alley construction is only supporting and water blocking, steel sheet pile are carried out using steel sheet pile technology Pipe alley structure construction is also carried out inside and outside groove, a large amount of mountain skin soil of still needing are used for infrastructure and construction passage construction, largely Dredging work and backfill are filled for top.Steel sheet pile method construction precision is more demanding, need to frequently measure, construction quality is not easy Control.

Pipe alley construction is carried out in silt soft foundation, mountain skin soil strong rammer need to largely transport outward material, especially deep basal pit pipeline Greatly much less ditch construction slope, there is 3~6 meters thick mountain skin soil embankments below, a large amount of backfills are also wanted in top, also be relatively large in diameter compared with The pipeline of weight be seated in can over time in the mountain skin soil strong rammer of reduction trend on the basis of, design needs larger safety coefficient.

Here the construction of deep basal pit pipe alley need to largely transport outward material, be not environmentally greatest problem.Cement mixing pile does gravity Barricade, stake bottom need to be seated on the soil layer of certain bearing capacity, more than ten meters of cement mixing pile is built on soft base, stake footpath only has 0.6 meter, stake and stake is often needed to overlap and be double arrangement in detail design, this considerably increases the engineering of cement mixing pile Amount, expensive construction work expense often make design department to use.

The content of the invention

The purpose of this utility model is to provide a kind of mud deep basal pit pipe alley structure, to solve the deep basal pit pipe in soft base Road ditch spread man-hour, practical using a kind of simple economy, construction is convenient, environmentally protective, and curing agent consolidation and section are entity side The anti-technical problem dug out groove and carry out pipe laying of type.

In order to realize foregoing invention purpose, technical solution is as follows used by the utility model：

A kind of mud deep basal pit pipe alley structure, pipe alley both sides consolidate the solidified earth plate body knot of mud formation for curing agent Pipe laying is carried out in structure, the pipe alley section for entity square groove, and the upper limb of pipe alley consolidation body section is mutually held in the mouth with solidified earth plate body Connect；At the pipe laying of the pipe alley bottom, equipped with metalling and concrete component layer.

The advantages of the utility model and good effect are as follows：

The deep basal pit pipe alley structure of the utility model structure is all using sludge solidification soil material, convenient, structure of constructing Simply, of low cost, intensity meets design requirement.Due to the long-range Yushan Hill skin soil material of solidified earth intensity, therefore pipe can also be made Lower support structure simplifies, and the solidified earth dug out can meet to require as in terms of the performance of backfill and construction, so with tradition Technology is compared and greatly reduces total pipe alley construction cost.

Carry out the construction of deep basal pit pipe alley on the soft base of large area, substantially can be by the utility model and mountain skin soil strong rammer, drawing Gloomy steel sheet pile and cement mixed pile technology carry out construction cost comparison, this ratio is 1：2：3：6, do not consider solidified earth also here The construction period of deep basal pit pipe alley is compared with the shortening half of mountain skin soil strong rammer, and the influence of environmentally friendly cost.

Brief description of the drawings

Fig. 1 is that the pipe alley of the utility model cures stirring-head movement cabling precedence diagram.

Fig. 2, which is that the slope groove of the utility model is counter, digs formation figure.

Fig. 3 is the utilizing solidified earth from sludge pipe alley structure diagram of the utility model.

Numbered in figure：1st, the solidified earth plate body of utilizing solidified earth from sludge, 2, backfill, 3, pipeline, 4, metalling,

5th, concrete component layer, 6, the pipe alley section of utilizing solidified earth from sludge.

Embodiment

The concrete structure of the utility model and formation are consolidated referring to shown in Fig. 1,2,3 in large area mud using curing agent The construction problem of pipe alley can be run into during construction technology, if pipe alley is constructed using curing agent concretion technology, needs to reserve The position of pipe alley, pipe alley consolidation body section is entity square, and upper limb is mutually connected with solidified earth plate body.Entity square pipe alley Section lateral dimension is related such that, if pipe diameter is 1~2 meter, the operating spaces of both sides is 0.75 to multiply 2, two side Thickness multiplies 2 for 1.5~3 meters, therefore the lateral dimension of entity square is 5.5~9.5 meters.The depth of square pipe alley is by designing Lai really It is fixed, for natural Yield rainfall relation therefore use shelving to design, and consider each pipe trench length and vertical shaft quantity as a whole and be unlikely to pipe trench and consolidate Knot body depth is too big, and induration square scrapes out groove from center of top is counter, and the sequence of construction of silt consolidation pipe alley is shown in Fig. 1, anti-to dig The pipe alley slope groove of formation is shown in Fig. 2.

The construction of pipe alley consolidation is equipped with the special stirring-head with spiral propeller using excavator, and feed utilizes cement Tank car in bulk, air pressure only has 1~1.5MPa during feed, therefore construction is not easy to form airborne dust, curing agent used to have obtained patent of invention, Patent No. notification number：CN101081718A, a kind of sludge curing agent and its application.Pipe alley solidified earth design strength field sampling Detect and (soak within 7 days) up to 0.3~0.4MPa.

Referring to Fig. 1：On same section, stirring-head moves up and down, from left to right need to be 2 for a cycle period, feed Completed in~3 cycles, so that cloth is as far as possible uniform.To accomplish outer real internal weakness during cloth, outer how interior few, stirring-head is transported on the outside Scanning frequency degree will will be grown the slow or residence time, and surveying the speed of service inside will soon, and outside admixture curing agent 8~10%, inside is mixed Add curing agent 5~8%, inside solidification soil will be dug out for backfill.

Referring to Fig. 2：Curing agent 8~10% is filled in the mud of pipe alley shade position and requires field sampling non-confining strength Degree (soaking for 7 days) is more than 0.4MPa, and groove domestic demand digs out the utilizing solidified earth from sludge admixture curing agent 5~8% at position, it is desirable to field sampling Unconfined compressive strength (immersion in 7 days) is more than 0.3MPa, and the anti-groove that excavates after consolidation construction is operated in pipe alley completion stirring admittedly Completed after knot in 7~15 days, time short solidified earth insufficient strength, the time grown intensity too it is high can cause to excavate it is difficult.

Claims (1)

1. a kind of mud deep basal pit pipe alley structure, it is characterised in that pipe alley both sides consolidate consolidating for mud formation for curing agent Change native plate body structure, which comes pipe laying, the upper limb of pipe alley consolidation body section and curing for entity square groove Native plate body is mutually connected；At the pipe laying of the pipe alley bottom, equipped with metalling and concrete component layer.