CN104141285A

CN104141285A - Seepage-proofing seawall

Info

Publication number: CN104141285A
Application number: CN201410383109.8A
Authority: CN
Inventors: 曾甄; 袁文喜; 罗昉昕; 邵燕华; 毛丹红
Original assignee: Zhejiang Design Institute of Water Conservancy and Hydroelectric Power
Current assignee: Zhejiang Design Institute of Water Conservancy and Hydroelectric Power
Priority date: 2014-08-06
Filing date: 2014-08-06
Publication date: 2014-11-12

Abstract

Provided is a seepage-proofing seawall. The filling materials of the body of the seawall are mainly riprap, the middle portion of the body of the seawall is filled with filling sand, and concrete diaphragm walls are arranged in the filling sand. A filter bag contained rubble layer is arranged between the filling sand and the riprap, and a sand filled drainage layer is arranged on the bottom of the filling sand. The filling sand is filled through sand filling pipe bags. A double-row high pressure swing jet concrete diaphragm wall is adopted for each concrete diaphragm wall. Using of airtight earthwork is eliminated, the problem that airtight earthwork is difficult to fill is solved, construction duration can be shortened, project amount can be reduced, and therefore overall investment of a project can be saved; the section width of the body of the seawall is reduced, and the area, occupied by the seawall, of an intertidal zone or a sea area is reduced.

Description

A kind of antiseepage sea wall

Technical field

The present invention relates to a kind of water conservancy project water retaining structure, especially a kind of antiseepage sea wall that adopts ramp type jackstone to add concrete cut section configuration in conjunction with back-up sand.

Background technology

Land resources is the important foundation that ensures economic development, is accompanied by economic fast development, construction land growing tension, and Tidal Flat Reclamation not only can ensure soil safety, alleviate the contradiction of Land Demand, can also improve flood control and disaster reduction ability; Adjustment, the development of urbanization and the construction of infrastructure that it is the coastal area industrial structure provide good platform; It can promote socioeconomic sustainable development, is the important supplement approach that land resources obtains regeneration.

The embankment project of building at silt coast district Tidal Flat Reclamation at present, its structure be generally off-lying sea side by masonry dam gear tide, enclose district's side and adopt the antiseepage of holding one's breath of tidal land mud.Leakage preventing structure is mainly arranged in and encloses district's side, holds one's breath soil as main taking the mud of hypotonicity.The type sea wall can adapt to the larger sedimentation and deformation on mud soft soil foundation preferably, construction technology maturation, and stability and safety are better.But, along with Tidal Flat Reclamation engineering gradually by high beach enclose and cultivate in low beach enclose and cultivate development, traditional sea wall structure highlights the problem of following several respects: 1, the construction period is long.Two factors of efficiency of construction that what the construction period that tradition rock structure sea wall fills was mainly subject to that sea wall safety and stability controls allow rate of loading and antiseepage are held one's breath cubic metre of earth restrict, and the duration delays or delay manyly not increase because of the antiseepage earthwork construction progress of holding one's breath.2, the antiseepage supply difficulty of holding one's breath cubic metre of earth is large.Traditional structure sea wall cubic meter of stone amount and the antiseepage earth volume demand of holding one's breath is all larger, and the antiseepage earthwork of holding one's breath is mainly derived near tidal land mud sea wall, is coated with after face step-down on the one hand, and the depth of water is deepened, and traditional suction dredger not only efficiency is low, and cost multiplication; On the other hand, after the closure of sea wall Longkou, the earthwork of holding one's breath is all taken from and is enclosed inner side, district, and the increase later stage is made ground cost, has extended the construction period.3, sea wall design section is large, increase of investment.Sea wall section increases along with the reduction of the face of painting elevation, and the approximate relation with height of dam square multiple of sea wall investment increases.4, difficulty of construction is large, because engineering integral construction is long in time limit, need to experience multiple flood seasons, and the breakage that typhoon, sudden and violent tide will certainly be certain to embankment structure generation, washes away jackstone, has not only increased difficulty of construction, also will bring the engineering safety problem such as pass the flood period; After painting face reduces on the other hand, dykes and dams underwater portion section increases, and has increased the difficulty of construction of the levee body protection below the water surface, piece stone reason block and leveling.

Summary of the invention

The object of the invention is for the deficiencies in the prior art, a kind of antiseepage sea wall is provided, adopt ramp type jackstone to add concrete cut section configuration in conjunction with back-up sand.This sea wall barrier performance is good, cancelled the use that antiseepage is held one's breath cubic metre of earth, shortened levee body section width, reduced occupation of land (with the sea) area of sea wall, saved duration and engineering quantity, thereby reduced the entirety investment of engineering.

The technical solution used in the present invention is:

A kind of antiseepage sea wall, is characterized in that: the filling material of levee body, taking jackstone as main, fills back-up sand at levee body middle part, and concrete cut is set in back-up sand.

As preferably, between described back-up sand and jackstone, be provided with the packed macadam of anti-filter, back-up sand bottom is provided with sand mat of subgrade.

As preferably, described back-up sand adopts sandstone charging pipe bag to fill.

As preferably, described concrete cut adopts double high pressure swing pneumatically placed concrete impervious wall.

The invention has the beneficial effects as follows:

1, cancelled the use that antiseepage is held one's breath cubic metre of earth, solved antiseepage and held one's breath and cubic metre of earth fill the problem that difficulty is large, and can save duration and engineering quantity, thereby saved the investment of engineering entirety;

2, the filling material of levee body, taking jackstone as main, is arranged the back-up sand of certain width at levee body middle part, and concrete cut is set in back-up sand, and this structural shape has good barrier performance; And the angle of internal friction of jackstone and back-up sand is large, easily fills, section resistance to overturning is good, thereby dwindled sea wall levee body section width, has reduced sea wall and take the area in beach or marine site.

Brief description of the drawings

Fig. 1 is the section structure schematic diagram of antiseepage sea wall of the present invention;

Fig. 2 is the levee body middle part section structure schematic diagram of antiseepage sea wall of the present invention.

Label declaration in figure: 1-jackstone; 2-back-up sand; The packed macadam of 3-anti-filter; 4-sand mat of subgrade; 5-concrete cut; 6-spins geotextiles; 7-hardcore bed; 8-plastic draining plate; The outer slope of 9-mask; 10-inner slope mask; 11-wave wall; 12-sandstone charging pipe bag.

Detailed description of the invention

Below in conjunction with drawings and Examples, the present invention is described in further detail.

A kind of antiseepage sea wall of the present invention, the filling material of levee body, taking jackstone 1 as main, fills back-up sand 2 at levee body middle part, and concrete cut 5 is set in back-up sand 2; Between back-up sand 2 and jackstone 1, be provided with the packed macadam 3 of anti-filter, back-up sand 2 bottoms are provided with sand mat of subgrade 4; Back-up sand 2 adopts sandstone charging pipe bag 11 to fill; Concrete cut 5 adopts double high pressure swing pneumatically placed concrete impervious wall; Thereby form antiseepage body, reach the object of antiseepage.

The work progress of antiseepage sea wall of the present invention is: first lay subfoundation and spin geotextiles 6, jettisoning again hardcore bed 7 with charge sand mat of subgrade 4, adopt again plastic draining plate 8 to carry out based process, plastic draining plate 8 regular arrangement are inserted the following certain depth of painting face, carrying out afterwards main body levee body fills, layering is followed in filling of levee body jackstone 1, segmentation, subregion loads, ensure sea wall balanced rising within the scope of safe load, the packed macadam 3 of anti-filter fills immediately following jackstone 1 with back-up sand 2, and follow the leading principle of jackstone 1 appropriateness, back-up sand 2 adopts sandstone charging pipe bag 12 to fill, filling bag answers layering to place, stacking neat, arrange in order, tight, the upper and lower fissure of displacement, every layer of bag is advisable so that 0.4～0.8m is thick, fill in process at levee body, in conjunction with settlement Control, synchronously carry out outer slopes at different levels mask 9 and inner slope mask 10, until levee body fill top and sedimentation basicly stable after, with high pressure swing spray machine formation high pressure swing pneumatically placed concrete impervious wall 5, finally build levee crown wave wall 11.

Claims

1. an antiseepage sea wall, is characterized in that: the filling material of levee body, taking jackstone (1) as main, fills back-up sand (2) at levee body middle part, and concrete cut (5) is set in back-up sand (2).

2. according to the antiseepage sea wall described in claim 1, it is characterized in that: between described back-up sand (2) and jackstone (1), be provided with the packed macadam of anti-filter (3), back-up sand (2) bottom is provided with sand mat of subgrade (4).

3. antiseepage sea wall according to claim 1 and 2, is characterized in that: described back-up sand (2) adopts sandstone charging pipe bag (12) to fill.

4. antiseepage sea wall according to claim 1, is characterized in that: described concrete cut (5) adopts double high pressure swing pneumatically placed concrete impervious wall.